CN103413535A - Method and device for widening liquid crystal display screen visibility angle range - Google Patents
- ️Wed Nov 27 2013
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- CN103413535A CN103413535A CN2013103442023A CN201310344202A CN103413535A CN 103413535 A CN103413535 A CN 103413535A CN 2013103442023 A CN2013103442023 A CN 2013103442023A CN 201310344202 A CN201310344202 A CN 201310344202A CN 103413535 A CN103413535 A CN 103413535A Authority
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Abstract
The invention belongs to the field of liquid crystal display screens and provides a method and device for widening the liquid crystal display screen visibility angle range. The method comprises the steps that an original voltage value, controlling the color of a liquid crystal display screen, in an original color picture signal is obtained; meanwhile, digital-to-analog conversion are conducted on the original voltage value for twice so that two different driving voltages can be generated; the two different driving voltages are respectively adjusted according to the original voltage value so that two different control voltages can be obtained; every two sets of liquid crystal molecules corresponding to each pixel point are controlled to rotate respectively according to the two different control voltages. According to the method and device for widening the liquid crystal display screen visibility angle range, digital-to-analog conversion are conducted on the original voltage value of the color picture signal for twice so that the two different driving voltages can be generated, the driving voltages are adjusted, every two sets of liquid crystal molecules corresponding to one pixel point of the liquid crystal display screen are controlled to rotate respectively, and therefore the liquid crystal display screen visibility angle range is enlarged.
Description
Technical field
The invention belongs to the LCDs field, relate in particular to a kind of method and apparatus that improves LCDs angle of visibility scope.
Background technology
The video picture principle of LCDs, be that liquid crystal is placed between two electro-conductive glass, and the driving by electric field between two electrodes, cause the liquid crystal molecule distortion, and the intensity in transmission of visual light source is closely related with the liquid crystal molecule distortion angle.
We can find such problem when seeing TV, within the some angular ranges of the horizontal direction that stands in the televisor dead ahead, can very clearly see content shown on television display screen, and picture color is also very natural, comfortable; But when you see sideling, and while being up to the standard a certain angle of squint of direction, just can not gem-purely see the content of display screen, in other words, the television image color of seeing has become, such as losing coloured silk etc.The angle of visibility problem of Here it is televisor, can distortionlessly see that this angle of squint scope of picture is the angle of visibility scope, and the angle of visibility scope of existing LCDs is generally less.
Summary of the invention
The invention provides a kind of method that improves LCDs angle of visibility scope, be intended to solve the less problem of available liquid crystal display screen angle of visibility scope.
In order to solve the problems of the technologies described above, the present invention is achieved in that a kind of method that improves LCDs angle of visibility scope, each picture element of described LCDs is comprised of two groups of three primary colors respectively, described two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the method for described raising LCDs angle of visibility scope comprises the following steps:
Obtain the raw voltage values of controlling the color of described LCDs in the original color image signal;
Simultaneously described raw voltage values is carried out to twice digital-to-analog conversion and generate two different driving voltages;
Respectively described two different driving voltage adjustment are generated and control respectively two different control voltages that described two groups of liquid crystal molecules are rotated;
According to described two different control voltages, controlling respectively described two groups of liquid crystal molecules is rotated.
Further, the described step of simultaneously described raw voltage values being carried out to twice digital-to-analog conversion and generating two different driving voltages specifically comprises the following steps:
Described raw voltage values is carried out to digital-to-analog conversion for the first time and generate first group of first driving voltage that liquid crystal molecule is rotated in the described two groups of liquid crystal molecules of driving;
Described raw voltage values is carried out to digital-to-analog conversion for the second time and generate second group of second driving voltage that liquid crystal molecule is rotated in the described two groups of liquid crystal molecules of driving.
Further, describedly respectively described two different driving voltage adjustment are generated to the step of controlling respectively two different control voltages that described two groups of liquid crystal molecules are rotated and specifically comprise the following steps:
According to described raw voltage values and the first predetermined angle, described the first driving voltage is carried out to size adjustment, control the first control voltage of described first group of liquid crystal molecule to described the first predetermined angle of vertical plane anticlockwise with respect to described LCDs to generate;
According to described raw voltage values and the second predetermined angle, described the second driving voltage is carried out to size adjustment, control the second control voltage of described second group of liquid crystal molecule to described the second predetermined angle of vertical plane right rotation with respect to described LCDs to generate.
Further, described first controls voltage is less than described raw voltage values, and described second controls voltage is greater than described raw voltage values.
Further, describedly according to described two different control voltages, control respectively the step that described two groups of liquid crystal molecules are rotated and specifically comprise the following steps:
According to described first, control the described first group of liquid crystal molecule of Control of Voltage to described the first predetermined angle of the vertical plane anticlockwise with respect to described LCDs;
According to described second, control the described second group of liquid crystal molecule of Control of Voltage to described the second predetermined angle of the vertical plane right rotation with respect to described LCDs.
The present invention also provides a kind of device that improves LCDs angle of visibility scope, each picture element of described LCDs is comprised of two groups of three primary colors respectively, described two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the device of described raising LCDs angle of visibility scope comprises:
Signal acquiring unit, control the raw voltage values of the color of described LCDs for obtaining the original color image signal;
D/A conversion unit, generate two different driving voltages for simultaneously described raw voltage values being carried out to twice digital-to-analog conversion;
The voltage-regulation unit, for generating and control respectively two different control voltages that described two groups of liquid crystal molecules are rotated described two different driving voltage adjustment respectively;
The electrode control module, be rotated for according to described two different control voltages, controlling respectively described two groups of liquid crystal molecules.
Further, described D/A conversion unit comprises:
The first D/A conversion unit, generate for described raw voltage values being carried out to digital-to-analog conversion for the first time the first driving voltage that first group of liquid crystal molecule of the described two groups of liquid crystal molecules of driving is rotated;
The second D/A conversion unit, generate for described raw voltage values being carried out to digital-to-analog conversion for the second time the second driving voltage that second group of liquid crystal molecule of the described two groups of liquid crystal molecules of driving is rotated.
Further, described voltage-regulation unit comprises:
The first voltage-regulation unit, for according to described raw voltage values and the first predetermined angle, described the first driving voltage being carried out to size adjustment, control the first control voltage of described first group of liquid crystal molecule to described the first predetermined angle of vertical plane anticlockwise with respect to described LCDs to generate;
The second voltage regulon, for according to described raw voltage values and the second predetermined angle, described the second driving voltage being carried out to size adjustment, control the second control voltage of described second group of liquid crystal molecule to described the second predetermined angle of vertical plane right rotation with respect to described LCDs to generate.
Further, described first controls voltage is less than described raw voltage values, and described second controls voltage is greater than described raw voltage values.
Further, described electrode control module comprises:
The first electrode control module, for controlling the described first group of liquid crystal molecule of Control of Voltage to described the first predetermined angle of the vertical plane anticlockwise with respect to described LCDs according to described first;
The second electrode control module, for controlling the described second group of liquid crystal molecule of Control of Voltage to described the second predetermined angle of the vertical plane right rotation with respect to described LCDs according to described second.
In the present invention, by raw voltage values in colour picture signal being carried out to twice digital-to-analog conversion, obtain two control voltages, to controlling voltage, adjust, control respectively two groups of liquid crystal molecules that each picture element of LCDs is corresponding, make the liquid crystal molecule that each picture element of LCDs is corresponding be rotated distortion under the effect of controlling voltage, enlarge the angle of visibility scope of LCDs, solved the less problem of available liquid crystal display screen angle of visibility scope.
The accompanying drawing explanation
Fig. 1 is the process flow diagram of the method that LCDs angle of visibility scope is provided that provides of the embodiment of the present invention;
Fig. 2 be the liquid crystal molecule that provides of the embodiment of the present invention respectively left and to right rotation, enlarge the schematic diagram of angle of visibility scope;
Fig. 3 is the modular structure figure of the device that LCDs angle of visibility scope is provided that provides of the embodiment of the present invention;
Fig. 4 is the circuit structure diagram of the first voltage-regulation unit of providing of the embodiment of the present invention;
A1 means wherein a group in two groups of liquid crystal molecules that in LCDs, each picture element is corresponding;
A2 means another group in two groups of liquid crystal molecules that in LCDs, each picture element is corresponding.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment, specific implementation of the present invention is described in detail:
Fig. 1 illustrates the process flow diagram of the method for the raising LCDs angle of visibility scope that the embodiment of the present invention provides, and for convenience of explanation, only lists the part relevant to the present embodiment.
As one embodiment of the invention, the liquid crystal molecule of LCDs carries out the distortion rotation under the control of electrode, and when liquid crystal molecule has rotated different angles, thereby light source passes through color filter again in the different color of liquid crystal display screen display after seeing through liquid crystal molecule.
In embodiments of the present invention, each picture element of LCDs forms (three primary colors RGB and three primary colors R ' G ' B ' by two groups of three primary colors respectively, two kinds of three primary colors are identical), these two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the method that improves LCDs angle of visibility scope comprises the following steps:
Step S100, obtain in the original color image signal raw voltage values of the color of controlling LCDs.
In step S100, the original color image signal comprises the raw voltage values of controlling each picture element color, and the color of controlling each picture element is to realize by the different angle of distortion rotation of controlling liquid crystal molecule.
Step S200, simultaneously raw voltage values is carried out twice digital-to-analog conversion and generated two different driving voltages.
As one embodiment of the invention, raw voltage values is a digital signal, need to be converted into simulating signal, in embodiments of the present invention, needs simultaneously raw voltage values to be carried out to digital-to-analog conversion, generates two different driving voltages.
In step S200, simultaneously raw voltage values is carried out to the step that twice digital-to-analog conversion generate two different driving voltages and specifically comprises the following steps:
S201, raw voltage values is carried out to digital-to-analog conversion for the first time generate to drive first group of first driving voltage that liquid crystal molecule is rotated in two groups of liquid crystal molecules corresponding with each picture element;
S202, raw voltage values is carried out to digital-to-analog conversion for the second time generate to drive second group of second driving voltage that liquid crystal molecule is rotated in two groups of liquid crystal molecules corresponding with each picture element.
Step S300, respectively two different driving voltage adjustment are generated and control respectively two different control voltages that two groups of liquid crystal molecules are rotated.
In embodiments of the present invention, need to adjust the driving voltage carried out after digital-to-analog conversion, because, there are certain difference in magnitude of voltage and the raw voltage values of carrying out after digital-to-analog conversion, if directly using the first driving voltage and the second driving voltage to control respectively two groups of liquid crystal molecules is rotated, the color that so final LCDs shows is by distortion and comparatively serious, for fear of this imagination, just need to driving voltage, carry out (size) according to raw voltage values and adjust to generate control voltage, make its (control voltage) near raw voltage values, because liquid crystal molecule itself has visible angle (being generally 60 degree), when control voltage is greater than raw voltage values or is less than raw voltage values, angle of visibility scope perpendicular to LCDs one side will become large, the angle of visibility scope of opposite side will diminish, when two one of voltages of control are greater than raw voltage values, one while being less than raw voltage values, angle of visibility scope perpendicular to the LCDs both sides all will enlarge.
In step S300, respectively two different driving voltage adjustment are generated to the step of controlling respectively two different control voltages that two groups of liquid crystal molecules are rotated and specifically comprise the following steps:
S301, according to raw voltage values and the first predetermined angle, the first driving voltage is carried out to size adjustment, control first group of liquid crystal molecule and control voltage to first of vertical plane anticlockwise the first predetermined angle with respect to LCDs to generate;
S302, according to raw voltage values and the second predetermined angle, the second driving voltage is carried out to size adjustment, control second group of liquid crystal molecule and control voltage to second of vertical plane right rotation the second predetermined angle with respect to LCDs to generate.。
In step S301 and step S302, the first predetermined angle is that vertical plane with respect to LCDs is to a certain set angle of anticlockwise, the second predetermined angle is that vertical plane with respect to LCDs is to a certain set angle of right rotation, the anglec of rotation of liquid crystal molecule is by controlling voltage, to be added on the battery lead plate on liquid crystal molecule both sides to control, sense of rotation and angle that different control voltage is corresponding different, when we need liquid crystal molecule to the left or to the right during the angle of our needs of deflection, only need to correspondingly adjust the control voltage be added on battery lead plate, in embodiments of the present invention, first controls voltage is less than raw voltage values, second controls voltage is greater than raw voltage values, and when control voltage is less than raw voltage values, corresponding liquid crystal molecule can be to anticlockwise with respect to the vertical plane of LCDs, corresponding liquid crystal molecule can be to right rotation with respect to the vertical plane of LCDs when control voltage is greater than primary voltage.
Step S400, according to two different control voltages, control respectively two groups of liquid crystal molecules and be rotated.
In step S400, according to two different control voltages with control respectively the step that two groups of liquid crystal molecules are rotated and be specially:
Step S401, control first group of liquid crystal molecule of Control of Voltage to vertical plane anticlockwise the first predetermined angle with respect to LCDs according to first;
Step S402, control second group of liquid crystal molecule of Control of Voltage to vertical plane right rotation the second predetermined angle with respect to LCDs according to second.
In embodiments of the present invention, two different control voltages are added in respectively on the battery lead plate that controls the liquid crystal rotation in LCDs, liquid crystal molecule is the distortion rotation angle and direction corresponding with controlling voltage under the effect of controlling voltage, respectively to the vertical plane with respect to LCDs left and after with respect to the vertical plane of LCDs, having carried out the distortion rotation to the right, the angle of visibility scope of its sense of rotation will enlarge when two groups of liquid crystal molecules.
In embodiments of the present invention, every kind of color of each picture element the inside of LCDs is to be controlled by the control voltage that two driving voltage adjustment produce afterwards, each picture element is comprised of two groups of identical three primary colors, every group of corresponding one group of liquid crystal molecule of three primary colors difference, so namely on the basis of traditional LCDs, added one (electrode) and controlled voltage and one group of three primary colors and the one group liquid crystal molecule corresponding with three primary colors, by two, control voltage and control respectively the two groups of liquid crystal molecules difference predetermined angle of distortion rotation different (or identical) (different angle of liquid crystal molecule rotation that different control Control of Voltage is corresponding round about, when we need to make the liquid crystal molecule rotation reach the angle of our needs, only need the corresponding size of controlling voltage of adjusting to realize), as shown in Figure 2, for example first control one group of liquid crystal molecule of Control of Voltage to the vertical plane with respect to LCDs to anticlockwise θ 5 angles, second controls another group liquid crystal molecule of Control of Voltage to the vertical plane with respect to LCDs to right rotation θ 6 angles, if the angle of visibility of single liquid crystal molecule is 60 °, the user is moved to the left θ 5+60 ° in the display screen dead ahead, or the display screen dead ahead θ 6+60 ° that moves right, still within the angle of visibility scope of this picture element, still can see normal image, the angle of visibility scope that is LCDs has increased θ 6+ θ 5.
Fig. 3 illustrates the modular structure of the device of the raising LCDs angle of visibility scope that the embodiment of the present invention provides, and for convenience of explanation, only lists the part relevant to the present embodiment.
As one embodiment of the invention, the liquid crystal molecule of LCDs carries out the distortion rotation under the control of electrode, and when liquid crystal molecule has rotated different angles, thereby light source passes through color filter again in the different color of liquid crystal display screen display after seeing through liquid crystal molecule.
In embodiments of the present invention, each picture element of LCDs forms (three primary colors RGB and three primary colors R ' G ' B ' by two groups of three primary colors respectively, two kinds of three primary colors are identical), these two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the
device1 that improves LCDs angle of visibility scope comprises:
Signal acquiring
unit10, control the raw voltage values of the color of LCDs for obtaining the original color image signal;
D/A
conversion unit20, generate two different driving voltages for simultaneously raw voltage values being carried out to twice digital-to-analog conversion;
Voltage-
regulation unit30, for according to respectively two different driving voltage adjustment being generated and control respectively two different control voltages that described two groups of liquid crystal molecules are rotated;
40, be rotated for according to two different control voltages, controlling respectively two groups of liquid crystal molecules.
In embodiments of the present invention, the original color image signal comprises the raw voltage values of controlling each picture element color, and the color of controlling each picture element is to realize by the different angle of distortion rotation of controlling liquid crystal molecule, and raw voltage values is a digital signal, need to be converted into simulating signal, in embodiments of the present invention, simultaneously raw voltage values is carried out to digital-to-analog conversion, generate two different driving voltages, need to be because there are certain difference in magnitude of voltage and the raw voltage values of carrying out after digital-to-analog conversion to the driving voltage adjustment of carrying out digital-to-analog conversion, if directly using the first driving voltage and the second driving voltage to control respectively two groups of liquid crystal molecules is rotated, the color that so final LCDs shows is by distortion and comparatively serious, for fear of this imagination, just need to driving voltage, carry out (size) according to raw voltage values and adjust production control voltage, make its (control voltage) near raw voltage values, because liquid crystal molecule itself has visible angle (being generally 60 degree), when control voltage is greater than raw voltage values or is less than raw voltage values, angle of visibility scope perpendicular to LCDs one side will become large, the angle of visibility scope of opposite side will diminish, when two one of voltages of control are greater than raw voltage values, one while being less than raw voltage values, angle of visibility scope perpendicular to the LCDs both sides all will enlarge.
As one embodiment of the invention, D/A
conversion unit20 comprises:
The first D/A
conversion unit201, generate for raw voltage values being carried out to digital-to-analog conversion for the first time the first driving voltage that first group of liquid crystal molecule of two groups of liquid crystal molecules of driving is rotated;
The second D/A
conversion unit202, generate for raw voltage values being carried out to digital-to-analog conversion for the second time the second driving voltage that second group of liquid crystal molecule of two groups of liquid crystal molecules of driving is rotated.
In embodiments of the present invention, digital-to-analog conversion is that the binary digital signal amount is converted to the simulating signal amount, each binary digital code of input is become to corresponding analog quantity by its weights size conversion, then will represent everybody analog quantity addition, total analog quantity of gained is directly proportional to digital quantity, concrete, the aanalogvoltage uo(exported after digital-to-analog conversion i.e. the first driving voltage and the second driving voltage) to equal digital signal amount code be every corresponding each minute of 1 to simulate the voltage sum, wherein, the computing formula that binary digital code is converted into to decimal system analog quantity is as follows:
Dn = d n - 1 * 2 n - 1 + d n - 2 * 2 n - 2 + · · · + d 1 * 2 1 + d 0 * 2 0 = Σ i = 0 n - 1 d i 2 i
The aanalogvoltage u of output oComputing formula as follows:
u 0 = D n U REF = U REF Σ i = 0 n - 1 d i 2 i
Wherein, U REFFor reference voltage.
In the embodiment of the present invention, the detailed process of digital-to-analog conversion is: digital quantity is inputted in mould serial or parallel mode, and exist in data buffer, the U.S. figure place code of register output drives the electronic switch on corresponding numerical digit, and the corresponding numerical digit weights that will obtain in decoding network are sent into summing circuit; Summing circuit, by every weights addition, is just obtained to the analog quantity corresponding with digital quantity.
As one embodiment of the invention, the voltage-regulation unit comprises:
The first voltage-
regulation unit301, for according to raw voltage values and the first predetermined angle, the first driving voltage being carried out to size adjustment, control the first control voltage of first group of liquid crystal molecule to vertical plane anticlockwise the first predetermined angle with respect to LCDs to generate;
302, for according to raw voltage values and the second predetermined angle, the second driving voltage being carried out to size adjustment, control the second control voltage of second group of liquid crystal molecule to vertical plane right rotation the second predetermined angle with respect to LCDs to generate.
In embodiments of the present invention, in fact the first voltage-regulation unit 301 and second voltage regulon 302 are exactly the GAMMA calibrating installation (circuit) in traditional LCDs, in embodiments of the present invention, the GAMMA calibrating installation is two, the grey exponent number that corresponding the first voltage-regulation unit 301 of difference and second voltage regulon 302, the first voltage-regulation unit 301 and second voltage regulon 302 can produce respectively is 2 8individual, as shown in Figure 4, the first voltage-regulation unit 301(second voltage regulon 302 and the first voltage-regulation unit 301 are identical, and the present embodiment is only listed the circuit structure of the first voltage-regulation unit 301) reference voltage V REFand go here and there 256 precision resistances are arranged respectively between ground GND, the link of any two resistance can obtain a magnitude of voltage, this magnitude of voltage that utilization obtains is adjusted driving voltage, due to, in LCDs, the angle of liquid crystal molecule rotation distortion is all to follow the size of controlling voltage to change, when we need to make a certain angle of its rotation with the expansion visual range, only need the corresponding size of controlling voltage of adjusting, and control voltage, be to be obtained by the first voltage-regulation unit 301 and 302 pairs of the first driving voltages of second voltage regulon and the second driving voltage adjustment, and driving voltage is to carry out digital-to-analog conversion by raw voltage values, this value is unmodifiable, we just need to adjust by the first voltage-regulation unit 301 and second voltage regulon 302, make two groups of liquid crystal molecules rotate respectively its corresponding predetermined angle, thereby enlarge the angle of visibility scope of LCDs.As one embodiment of the invention, first controls voltage is less than raw voltage values, and second controls voltage is greater than raw voltage values.
In embodiments of the present invention, the first predetermined angle is that vertical plane with respect to LCDs is to a certain set angle of anticlockwise, the second predetermined angle is that vertical plane with respect to LCDs is to a certain set angle of right rotation, the anglec of rotation of liquid crystal molecule is by controlling voltage, to be added on the battery lead plate on liquid crystal molecule both sides to control, sense of rotation and angle that different control voltage is corresponding different, when we need liquid crystal molecule to the left or to the right during the angle of our needs of deflection, only need to correspondingly adjust the control voltage be added on battery lead plate, in embodiments of the present invention, first controls voltage is less than raw voltage values, second controls voltage is greater than raw voltage values, and when control voltage is less than raw voltage values, corresponding liquid crystal molecule can be to anticlockwise with respect to the vertical plane of LCDs, corresponding liquid crystal molecule can be to right rotation with respect to the vertical plane of LCDs when control voltage is greater than primary voltage.
As one embodiment of the invention,
electrode control module40 comprises:
The first
electrode control module401, for controlling first group of liquid crystal molecule of Control of Voltage to described the first predetermined angle of the vertical plane anticlockwise with respect to LCDs according to first;
The second
electrode control module402, for controlling second group of liquid crystal molecule of Control of Voltage to described the second predetermined angle of the vertical plane right rotation with respect to LCDs according to second.
In embodiments of the present invention, every kind of color of each picture element the inside of LCDs is to be controlled by the control voltage that two driving voltage adjustment produce afterwards, each picture element is comprised of two groups of identical three primary colors, every group of corresponding one group of liquid crystal molecule of three primary colors difference, so namely on the basis of traditional LCDs, added one (electrode) and controlled voltage and one group of three primary colors and the one group liquid crystal molecule corresponding with three primary colors, by two, control voltage and control respectively the two groups of liquid crystal molecules difference predetermined angle of distortion rotation different (or identical) (different angle of liquid crystal molecule rotation that different control Control of Voltage is corresponding round about, when we need to make the liquid crystal molecule rotation reach the angle of our needs, only need the corresponding size of controlling voltage of adjusting to realize), as shown in Figure 2, for example first control one group of liquid crystal molecule of Control of Voltage to anticlockwise θ 5 angles, second controls another group liquid crystal molecule of Control of Voltage to right rotation θ 6 angles, if the angle of visibility of single liquid crystal molecule is 60 °, the user is moved to the left θ 5+60 ° in the display screen dead ahead, or the display screen dead ahead θ 6+60 ° that moves right, still within the angle of visibility scope of this picture element, still can see normal image, the angle of visibility scope that is LCDs has increased θ 6+ θ 5.
The principle of work of the device of the raising liquid crystal TV set angle of visibility the scope below embodiment of the present invention provided is illustrated.
In embodiments of the present invention, colour picture signal was digital signal before being transferred to LCDs, the same with the conventional color image signal is also the signal of 8bit, according to every group of three primary colors all corresponding one control voltage, the brightest GTG of each picture element is set to 255, dull gray rank are set to 0, through the first voltage-regulation unit 301(the one GAMMA calibrating installation) control voltage after regulating is less than raw voltage values (virtual voltage), corresponding liquid crystal molecule can to respect to the LCDs vertical plane to anticlockwise, through second voltage regulon 302(the 2nd GAMMA calibrating installation) control voltage after regulating is greater than raw voltage values (virtual voltage), corresponding liquid crystal molecule can to respect to the LCDs vertical plane to right rotation.
For example, the color that some picture element A show is red, corresponding raw voltage values (virtual voltage) is 13V, D/A conversion unit 20 carries out simultaneously twice digital-to-analog conversion by raw voltage values and generates the first driving voltage and the second driving voltage, the first driving voltage generated, such as being 12.5V, because the first driving voltage after transforming has different with the actual corresponding raw voltage values 13V of picture element A, if directly with the first driving voltage, controlling first group of liquid crystal molecule is rotated, the color that picture element A shows will be non-redness (being display distortion), for fear of this imagination, the first voltage-regulation unit 301(the one GAMMA calibrating installation) according to raw voltage values, the first driving voltage adjustment is obtained to first and control voltage, after making to adjust, first controls voltage near raw voltage values, because liquid crystal molecule itself has certain visible angle (being generally 60 degree), when the first control voltage approaches but is less than raw voltage values, corresponding liquid crystal molecule can be to respect to the anticlockwise of LCDs vertical plane, but still can clearly see the redness of picture element A at the LCDs vertical plane, in the situation that guarantee perpendicular to the clear color of seeing picture element A clearly of LCDs energy, the first size of controlling voltage can be adjusted, due to different control voltage, the angle that the liquid crystal molecule rotation is different, when our default first group of liquid crystal molecule to respect to LCDs vertical plane anticlockwise θ 5 angles, just need in the first voltage-regulation unit 301, choose corresponding magnitude of voltage the first driving voltage is carried out to size adjustment, such as choosing 0.495V, and the voltage (referring to Fig. 4) at the Gamma244 place in corresponding the first voltage-regulation unit 301 of 0.495V, after the voltage at Gamma244 place and the first driving voltage 12.5V addition, be the first control voltage 12.995V, near 13V, first group of liquid crystal molecule that now picture element A is corresponding is to respect to LCDs vertical plane left-hand rotation θ 5 angles.
In like manner, such as raw voltage values being carried out to the second driving voltage generated after digital-to-analog conversion for the second time, be 12.4V, when our default second group of liquid crystal molecule to respect to LCDs vertical plane right rotation θ 6 angles, just need in
second voltage regulon302, choose corresponding magnitude of voltage the second driving voltage is carried out to size adjustment, such as choosing 0.605V, and the Gamma228 place voltage in corresponding the
second regulon302 of 0.605V, after Gamma228 place voltage and the second driving voltage 12.4V addition, be the second control voltage 13.005V, near 13V, second group of liquid crystal molecule that now picture element A is corresponding is to respect to LCDs vertical plane right-hand rotation θ 6 angles.
Control voltage 12.995V and second and control the corresponding two groups of liquid crystal molecules controlling of voltage 13.005V and belong to same picture element in LCDs due to first, the magnitude of voltage difference, deflection angle is also variant, has so just kept also seeing effect preferably outside certain angular range.
In embodiments of the present invention, by raw voltage values in colour picture signal being carried out to twice digital-to-analog conversion, obtain two control voltages, to controlling voltage, adjust, control respectively two groups of liquid crystal molecules that each picture element of LCDs is corresponding, make the liquid crystal molecule that each picture element of LCDs is corresponding be rotated distortion under the effect of controlling voltage, enlarge the angle of visibility scope of LCDs, solved the less problem of available liquid crystal display screen angle of visibility scope.
It will be appreciated by those skilled in the art that the unit comprised for above-described embodiment is to divide according to function logic, but be not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also, just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Those of ordinary skills it is also understood that, realize that all or part of step in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be in being stored in a computer read/write memory medium, described storage medium, comprise ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. method that improves LCDs angle of visibility scope, it is characterized in that, each picture element of described LCDs is comprised of two groups of three primary colors respectively, described two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the method for described raising LCDs angle of visibility scope comprises the following steps:
Obtain the raw voltage values of controlling the color of described LCDs in the original color image signal;
Simultaneously described raw voltage values is carried out to twice digital-to-analog conversion and generate two different driving voltages;
Respectively described two different driving voltage adjustment are generated and control respectively two different control voltages that described two groups of liquid crystal molecules are rotated;
According to described two different control voltages, controlling respectively described two groups of liquid crystal molecules is rotated.
2. the method for raising LCDs angle of visibility scope as claimed in claim 1, is characterized in that, the described step of simultaneously described raw voltage values being carried out to twice digital-to-analog conversion and generating two different driving voltages specifically comprises the following steps:
Described raw voltage values is carried out to digital-to-analog conversion for the first time and generate first group of first driving voltage that liquid crystal molecule is rotated in the described two groups of liquid crystal molecules of driving;
Described raw voltage values is carried out to digital-to-analog conversion for the second time and generate second group of second driving voltage that liquid crystal molecule is rotated in the described two groups of liquid crystal molecules of driving.
3. the method for raising LCDs angle of visibility scope as claimed in claim 1 or 2, it is characterized in that, describedly respectively described two different driving voltage adjustment are generated to the step of controlling respectively two different control voltages that described two groups of liquid crystal molecules are rotated and specifically comprise the following steps:
According to described raw voltage values and the first predetermined angle, described the first driving voltage is carried out to size adjustment, control the first control voltage of described first group of liquid crystal molecule to described the first predetermined angle of vertical plane anticlockwise with respect to described LCDs to generate;
According to described raw voltage values and the second predetermined angle, described the second driving voltage is carried out to size adjustment, control the second control voltage of described second group of liquid crystal molecule to described the second predetermined angle of vertical plane right rotation with respect to described LCDs to generate.
4. the method for raising LCDs angle of visibility scope as claimed in claim 3, is characterized in that, described first controls voltage is less than described raw voltage values, and described second controls voltage is greater than described raw voltage values.
5. the method for raising LCDs angle of visibility scope as claimed in claim 1 or 2, is characterized in that, describedly according to described two different control voltages, controls respectively the step that described two groups of liquid crystal molecules are rotated and specifically comprise the following steps:
According to described first, control the described first group of liquid crystal molecule of Control of Voltage to described the first predetermined angle of the vertical plane anticlockwise with respect to described LCDs;
According to described second, control the described second group of liquid crystal molecule of Control of Voltage to described the second predetermined angle of the vertical plane right rotation with respect to described LCDs.
6. device that improves LCDs angle of visibility scope, it is characterized in that, each picture element of described LCDs is comprised of two groups of three primary colors respectively, and described two groups of three primary colors are corresponding two groups of liquid crystal molecules respectively, and the device of described raising LCDs angle of visibility scope comprises:
Signal acquiring unit, control the raw voltage values of the color of described LCDs for obtaining the original color image signal;
D/A conversion unit, generate two different driving voltages for simultaneously described raw voltage values being carried out to twice digital-to-analog conversion;
The voltage-regulation unit, for generating and control respectively two different control voltages that described two groups of liquid crystal molecules are rotated described two different driving voltage adjustment respectively;
The electrode control module, be rotated for according to described two different control voltages, controlling respectively described two groups of liquid crystal molecules.
7. the device of raising LCDs angle of visibility scope as claimed in claim 6, is characterized in that, described D/A conversion unit comprises:
The first D/A conversion unit, generate for described raw voltage values being carried out to digital-to-analog conversion for the first time the first driving voltage that first group of liquid crystal molecule of the described two groups of liquid crystal molecules of driving is rotated;
The second D/A conversion unit, generate for described raw voltage values being carried out to digital-to-analog conversion for the second time the second driving voltage that second group of liquid crystal molecule of the described two groups of liquid crystal molecules of driving is rotated.
8. the device of raising LCDs angle of visibility scope as described as claim 6 or 7, is characterized in that, described voltage-regulation unit comprises:
The first voltage-regulation unit, for according to described raw voltage values and the first predetermined angle, described the first driving voltage being carried out to size adjustment, control the first control voltage of described first group of liquid crystal molecule to described the first predetermined angle of vertical plane anticlockwise with respect to described LCDs to generate;
The second voltage regulon, for according to described raw voltage values and the second predetermined angle, described the second driving voltage being carried out to size adjustment, control the second control voltage of described second group of liquid crystal molecule to described the second predetermined angle of vertical plane right rotation with respect to described LCDs to generate.
9. the device of raising LCDs angle of visibility scope as claimed in claim 8, is characterized in that, described first controls voltage is less than described raw voltage values, and described second controls voltage is greater than described raw voltage values.
10. the device of raising LCDs angle of visibility scope as described as claim 6 or 7, is characterized in that, described electrode control module comprises:
The first electrode control module, for controlling the described first group of liquid crystal molecule of Control of Voltage to described the first predetermined angle of the vertical plane anticlockwise with respect to described LCDs according to described first;
The second electrode control module, for controlling the described second group of liquid crystal molecule of Control of Voltage to described the second predetermined angle of the vertical plane right rotation with respect to described LCDs according to described second.
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