TWI787838B - Display apparatus and display method thereof - Google Patents

A display apparatus and a display method thereof are provided. The display apparatus includes a plurality of memory chips. The display apparatus enables a corresponding memory chip according to a placement state of the display apparatus, and outputs a mode adjustment notification signal to a host to inform the host to reread extended display identification data of the enabled memory chip.

顯示裝置及其顯示方法Display device and display method thereof

本發明是有關於一種電子裝置，且特別是有關於一種顯示裝置及其顯示方法。The present invention relates to an electronic device, and in particular to a display device and a display method thereof.

顯示器在製造的過程中，需將延伸顯示辨識資料(Extended Display Identification data, EDID)至顯示器的記憶體中，該延伸顯示辨識資料具有與顯示器功能相關基本資料的標準視訊資料格式，例如最大螢幕大小、螢幕解析度、色彩深度、頻率、數位格式與類比格式，如此當播放裝置連接至顯示器時，便可從其連接器對應之記憶體讀取到延伸顯示辨識碼，而獲得顯示器的相關功能。During the manufacturing process of the display, the extended display identification data (Extended Display Identification data, EDID) needs to be stored in the memory of the display. The extended display identification data has a standard video data format with basic data related to the display function, such as the maximum screen size , screen resolution, color depth, frequency, digital format and analog format, so that when the playback device is connected to the display, the extended display identification code can be read from the memory corresponding to the connector to obtain the relevant functions of the display.

對於可改變擺放狀態的顯示器，例如可藉由旋轉機構由原本水平擺放的狀態轉為垂直擺放的狀態的顯示器，由於在顯示器的擺放狀態改變後，影像信號來源(例如電腦或其它播放裝置)並無法得知顯示器的擺放狀態變化，因此無法主動地隨顯示器的擺放狀態變化改變顯示器的顯示方式，使其正確地顯示影像內容。For a display that can change its placement state, such as a display that can be changed from an original horizontal placement state to a vertical placement state by a rotating mechanism, after the placement state of the display is changed, the source of the image signal (such as a computer or other Playing device) has no way of knowing the change of the placement state of the display, so it cannot actively change the display mode of the display according to the change of the placement state of the display, so that it can correctly display the image content.

本發明提供一種顯示裝置及其顯示方法，可對應顯示裝置的擺放狀態調整影像畫面的顯示方向，以正確的顯示影像畫面。The invention provides a display device and a display method thereof, which can adjust the display direction of an image frame corresponding to the placement state of the display device, so as to display the image frame correctly.

本發明的顯示裝置包括狀態偵測模組、多個記憶體晶片以及控制電路。狀態偵測模組偵測顯示裝置的擺放狀態。各自儲存延伸顯示識別資料，各記憶體晶片所儲存的延伸顯示識別資料對應不同的擺放狀態。控制電路耦接狀態偵測模組與上述多個記憶體晶片，依據顯示裝置的擺放狀態致能對應的記憶體晶片，並輸出模式調整通知信號給主機，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。The display device of the present invention includes a state detection module, a plurality of memory chips and a control circuit. The status detection module detects the placement status of the display device. The extended display identification data are respectively stored, and the extended display identification data stored in each memory chip correspond to different placement states. The control circuit is coupled to the state detection module and the plurality of memory chips, enables the corresponding memory chips according to the placement state of the display device, and outputs a mode adjustment notification signal to the host to inform the host that re-reading is enabled An extension of the memory chip to display identification information.

在本發明的一實施例中，上述的狀態偵測模組偵測顯示裝置的旋轉角度，以偵測顯示裝置的擺放狀態。In an embodiment of the present invention, the above state detection module detects the rotation angle of the display device to detect the placement state of the display device.

在本發明的一實施例中，上述的狀態偵測模組包括第一傾斜開關以及第二傾斜開關，第一傾斜開關與第二傾斜開關對應顯示裝置的擺放狀態輸出偵測信號，控制電路依據偵測信號致能對應顯示裝置的擺放狀態的記憶體晶片。In an embodiment of the present invention, the above state detection module includes a first tilt switch and a second tilt switch, the first tilt switch and the second tilt switch output detection signals corresponding to the placement status of the display device, and the control circuit According to the detection signal, the memory chip corresponding to the placement state of the display device is enabled.

在本發明的一實施例中，上述的控制電路包括解多工器以及重置電路。解多工器耦接第一傾斜開關、第二傾斜開關以及上述多個記憶體晶片，解多工器依據偵測信號輸出致能信號至對應顯示裝置的擺放狀態的記憶體晶片。重置電路耦接解多工器，依據偵測信號改變模式調整通知信號的電壓準位，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。In an embodiment of the present invention, the above-mentioned control circuit includes a demultiplexer and a reset circuit. The demultiplexer is coupled to the first tilt switch, the second tilt switch and the plurality of memory chips, and the demultiplexer outputs an enabling signal to the memory chip corresponding to the placement state of the display device according to the detection signal. The reset circuit is coupled to the demultiplexer, and adjusts the voltage level of the notification signal according to the change mode of the detection signal, so as to inform the host to reread the extended display identification data of the enabled memory chip.

在本發明的一實施例中，上述的重置電路依據偵測信號將模式調整通知信號由高電壓準位轉為低電壓準位一段預設時間，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。In an embodiment of the present invention, the above-mentioned reset circuit changes the mode adjustment notification signal from a high voltage level to a low voltage level for a preset period of time according to the detection signal, so as to inform the host to re-read the enabled memory Extended display identification data for bulk chips.

在本發明的一實施例中，上述的模式調整通知信號為熱插拔偵測信號。In an embodiment of the present invention, the aforementioned mode adjustment notification signal is a hot plug detection signal.

在本發明的一實施例中，上述的重置電路包括第一電容、第二電容、第一電阻、第二電阻、第三電阻、第一電晶體以及第二電晶體。第一電容的第一端耦接解多工器的輸出端。第一電晶體耦接於第一電容的第二端與接地之間。第二電容與第一電阻耦接於第一電容的第一端與接地之間。第二電阻耦接於第一電阻與第二電容的共同接點與第一電晶體的控制端之間。第三電阻的第一端耦接第一電容的第二端。第二電晶體耦接於重置電路的輸出端與接地之間，第二電晶體的控制端耦接第三電阻的第二端。In an embodiment of the present invention, the above reset circuit includes a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a first transistor and a second transistor. The first terminal of the first capacitor is coupled to the output terminal of the demultiplexer. The first transistor is coupled between the second terminal of the first capacitor and ground. The second capacitor and the first resistor are coupled between the first terminal of the first capacitor and ground. The second resistor is coupled between the common junction of the first resistor and the second capacitor and the control terminal of the first transistor. The first terminal of the third resistor is coupled to the second terminal of the first capacitor. The second transistor is coupled between the output terminal of the reset circuit and the ground, and the control terminal of the second transistor is coupled to the second terminal of the third resistor.

在本發明的一實施例中，各記憶體晶片包括記憶體以及電晶體。記憶體耦接電源電壓。電晶體耦接於記憶體與接地之間，電晶體的控制端耦接解多工器，受控於致能信號而被導通，進而致能記憶體。In an embodiment of the present invention, each memory chip includes memory and transistors. The memory is coupled to the power supply voltage. The transistor is coupled between the memory and the ground, and the control end of the transistor is coupled to the demultiplexer, controlled by the enable signal to be turned on, and then the memory is enabled.

本發明還提供一種顯示裝置的顯示方法，顯示裝置包括多個記憶體晶片，各記憶體晶片儲存的延伸顯示識別資料對應顯示裝置不同的擺放狀態。顯示裝置的顯示方法包括下列步驟。偵測顯示裝置的擺放狀態。依據所偵測的擺放狀態致能對應的記憶體晶片。輸出模式調整通知信號給主機，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。The present invention also provides a display method for a display device. The display device includes a plurality of memory chips, and the extended display identification data stored in each memory chip corresponds to different placement states of the display device. The display method of the display device includes the following steps. Detect the placement state of the display device. The corresponding memory chip is enabled according to the detected arrangement state. The mode adjustment notification signal is output to the host to inform the host to reread the extended display identification data of the enabled memory chip.

在本發明的一實施例中，上述的顯示裝置的顯示方法包括，偵測顯示裝置的旋轉角度，以偵測顯示裝置的擺放狀態。In an embodiment of the present invention, the display method of the above-mentioned display device includes detecting the rotation angle of the display device to detect the placement state of the display device.

在本發明的一實施例中，上述的偵測顯示裝置的擺放狀態的步驟包括，利用第一傾斜開關以及第二傾斜開關的導通狀態，判斷顯示裝置的擺放狀態。In an embodiment of the present invention, the above-mentioned step of detecting the placement state of the display device includes using the conduction states of the first tilt switch and the second tilt switch to determine the placement state of the display device.

在本發明的一實施例中，上述的顯示裝置的顯示方法包括，改變模式調整通知信號的電壓準位，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。In an embodiment of the present invention, the display method of the above-mentioned display device includes changing the mode and adjusting the voltage level of the notification signal to inform the host to reread the extended display identification data of the enabled memory chip.

在本發明的一實施例中，上述的顯示裝置的顯示方法包括，將模式調整通知信號的由高電壓準位轉為低電壓準位一段預設時間，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。In an embodiment of the present invention, the display method of the above-mentioned display device includes: changing the mode adjustment notification signal from a high voltage level to a low voltage level for a preset period of time, so as to inform the host to re-read the enabled An extension of the memory chip to display identification information.

在本發明的一實施例中，上述的模式調整通知信號為熱插拔偵測信號。In an embodiment of the present invention, the aforementioned mode adjustment notification signal is a hot plug detection signal.

基于上述，本發明實施例的顯示裝置包括多個記憶體晶片，顯示裝置可依據顯示裝置的擺放狀態致能對應的記憶體晶片，並輸出模式調整通知信號給主機，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。如此，可在顯示裝置的擺放狀態改變時，使主機主動地重新讀取延伸顯示識別資料，以傳送對應的顯示資料，使顯示裝置對應擺放狀態的改變調整畫面顯示方向，而正確地顯示影像畫面。Based on the above, the display device of the embodiment of the present invention includes a plurality of memory chips, and the display device can enable the corresponding memory chips according to the placement state of the display device, and output a mode adjustment notification signal to the host to inform the host to re-read Extended display identification data of enabled memory chips. In this way, when the placement state of the display device changes, the host can actively re-read the extended display identification data to transmit the corresponding display data, so that the display device can adjust the display direction of the screen corresponding to the change of the placement state, and display correctly. video screen.

圖1是依照本發明的實施例的一種顯示裝置的示意圖，請參照圖1。顯示裝置102可包括記憶體晶片CP1~CP4、控制電路104以及狀態偵測模組106，控制電路104耦接記憶體晶片CP1~CP4以及狀態偵測模組106。顯示裝置102可例如為液晶顯示器或投影機，然不以此為限，其可例如透過視頻圖形陣列（Video Graphics Array，VGA）介面、數位視覺介面（Digital Visual Interface，DVI），或DisplayPort介面等各種介面標準與主機108連接。FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention, please refer to FIG. 1 . The display device 102 may include memory chips CP1 - CP4 , a control circuit 104 and a state detection module 106 , and the control circuit 104 is coupled to the memory chips CP1 - CP4 and the state detection module 106 . The display device 102 can be, for example, a liquid crystal display or a projector, but it is not limited thereto, and it can be, for example, through a video graphics array (Video Graphics Array, VGA) interface, a digital visual interface (Digital Visual Interface, DVI), or a DisplayPort interface, etc. Various interface standards are used to interface with the host computer 108 .

記憶體晶片CP1~CP4可例如為可程式化唯讀記憶體（Programmable Read Only Memory，PROM）晶片或電子可抹除可程式化唯讀記憶體（Electrically Erasable Programmable Read Only Memory，EEPROM）晶片，其可分別儲存延伸顯示識別資料，延伸顯示識別資料可包括預先定義的多個顯示訊號格式。其中各個記憶體晶片CP1~CP4所儲存的延伸顯示識別資料可分別用於擺放狀態不同的顯示裝置102。也就是說，各個記憶體晶片CP1~CP4所儲存的延伸顯示識別資料的顯示訊號格式分別對應顯示裝置102的一種畫面顯示方向。The memory chips CP1-CP4 can be, for example, programmable read-only memory (Programmable Read Only Memory, PROM) chips or electronically erasable programmable read-only memory (Electrically Erasable Programmable Read Only Memory, EEPROM) chips, which The extended display identification data can be stored separately, and the extended display identification data can include a plurality of pre-defined display signal formats. The extended display identification data stored in each of the memory chips CP1 - CP4 can be used for the display devices 102 in different placement states. That is to say, the display signal formats of the extended display identification data stored in the memory chips CP1 - CP4 respectively correspond to a display direction of the display device 102 .

舉例來說，記憶體晶片CP1的延伸顯示識別資料所記錄的顯示訊號格式可對應顯示裝置102的旋轉角度為0度時的水平方向，其包括解析度4096×2160、畫面顯示方向以及掃描頻率60赫茲的資訊。記憶體晶片CP2的延伸顯示識別資料所記錄的顯示訊號格式可對應顯示裝置102的旋轉角度為90度時的垂直方向，其包括解析度2160×4096、畫面顯示方向以及掃描頻率60赫茲的資訊。記憶體晶片CP3的延伸顯示識別資料所記錄的顯示訊號格式可對應顯示裝置102的旋轉角度為180度時的水平方向，其包括解析度4096×2160、畫面顯示方向以及掃描頻率60赫茲的資訊。記憶體晶片CP4的延伸顯示識別資料所記錄的顯示訊號格式可對應顯示裝置102的旋轉角度為270度時的垂直方向，其包括解析度2160×4096、畫面顯示方向以及掃描頻率60赫茲的資訊。For example, the display signal format recorded in the extended display identification data of the memory chip CP1 can correspond to the horizontal direction when the rotation angle of the display device 102 is 0 degrees, which includes a resolution of 4096×2160, a screen display direction and a scanning frequency of 60 Hertz information. The format of the display signal recorded in the extended display identification data of the memory chip CP2 can correspond to the vertical direction when the rotation angle of the display device 102 is 90 degrees, which includes the information of resolution 2160×4096, screen display direction and scanning frequency 60 Hz. The format of the display signal recorded in the extended display identification data of the memory chip CP3 can correspond to the horizontal direction when the rotation angle of the display device 102 is 180 degrees, which includes the information of resolution 4096×2160, screen display direction and scanning frequency 60 Hz. The format of the display signal recorded in the extended display identification data of the memory chip CP4 can correspond to the vertical direction when the rotation angle of the display device 102 is 270 degrees, which includes the information of resolution 2160×4096, screen display direction and scanning frequency 60 Hz.

狀態偵測模組106可偵測顯示裝置102的擺放狀態，例如圖2A和2C的水平擺放及圖2B和~2D的垂直擺放。狀態偵測模組106可包括傾斜開關TS1與TS2。傾斜開關TS1與TS2間的夾角小於180度(例如90度，然不以此為限)，以偵測顯示裝置102為水平擺放或垂直擺放。傾斜開關TS1與TS2可對應顯示裝置102的擺放狀態輸出偵測信號(在圖2A~2D實施例中，偵測信號為2位元信號)給控制電路104，以告知控制電路106顯示裝置102的擺放狀態。在圖2A中，當顯示裝置102以旋轉角度為0度的水平方向擺放時，傾斜開關TS1與TS2導通，而輸出2位元信號“11”給控制電路104。在圖2B中，當顯示裝置102以旋轉角度為90度的垂直方向擺放時，傾斜開關TS1斷開，傾斜開關TS2導通，而輸出2位元信號“01”給控制電路104。在圖2C中，當顯示裝置102以旋轉角度為180度的水平方向擺放時，傾斜開關TS1與TS2斷開，而輸出2位元信號“00”給控制電路104。在圖2D中，當顯示裝置102以旋轉角度為270度的垂直方向擺放時，傾斜開關TS1導通，傾斜開關TS2斷開，而輸出2位元信號“10”給控制電路104。The status detection module 106 can detect the placement status of the display device 102 , such as the horizontal placement in FIGS. 2A and 2C and the vertical placement in FIGS. 2B and ˜2D . The status detection module 106 may include tilt switches TS1 and TS2. The included angle between the tilt switches TS1 and TS2 is less than 180 degrees (for example, 90 degrees, but not limited thereto) to detect whether the display device 102 is placed horizontally or vertically. The tilt switches TS1 and TS2 can output a detection signal corresponding to the placement state of the display device 102 (in the embodiment of FIGS. placement status. In FIG. 2A , when the display device 102 is placed in a horizontal direction with a rotation angle of 0 degrees, the tilt switches TS1 and TS2 are turned on, and output a 2-bit signal “11” to the control circuit 104 . In FIG. 2B , when the display device 102 is placed in a vertical direction with a rotation angle of 90 degrees, the tilt switch TS1 is turned off, the tilt switch TS2 is turned on, and a 2-bit signal “01” is output to the control circuit 104 . In FIG. 2C , when the display device 102 is placed in a horizontal direction with a rotation angle of 180 degrees, the tilt switches TS1 and TS2 are turned off, and a 2-bit signal “00” is output to the control circuit 104 . In FIG. 2D , when the display device 102 is placed in a vertical direction with a rotation angle of 270 degrees, the tilt switch TS1 is turned on, the tilt switch TS2 is turned off, and a 2-bit signal “10” is output to the control circuit 104 .

控制電路104可依據傾斜開關TS1與TS2提供的2位元信號致能對應的記憶體晶片，並輸出模式調整通知信號HPD給主機108，以告知主機108重新讀取顯示裝置102中被致能的記憶體晶片的延伸顯示識別資料，使主機108傳送對應顯示裝置102的擺放狀態的顯示資料給顯示裝置102。如此，顯示裝置102便可對應擺放狀態的改變調整畫面顯示方向，而正確地顯示影像畫面，避免使用者觀看的影像畫面隨顯示裝置102旋轉而呈現90度傾倒或上下顛倒的狀態。The control circuit 104 can enable the corresponding memory chips according to the 2-bit signals provided by the tilt switches TS1 and TS2, and output the mode adjustment notification signal HPD to the host 108, so as to inform the host 108 to read the enabled memory chips in the display device 102 again. The extended display identification data of the memory chip enables the host computer 108 to transmit display data corresponding to the placement state of the display device 102 to the display device 102 . In this way, the display device 102 can adjust the display direction of the screen corresponding to the change of the placement state, and display the video screen correctly, preventing the video screen viewed by the user from being tilted 90 degrees or upside down when the display device 102 is rotated.

進一步來說，控制電路104可例如圖3所示，控制電路104包括解多工器DEMUX與重置電路RS1~RS4。解多工器DEMUX耦接傾斜開關TS1、TS2、重置電路RS1~RS4以及記憶體晶片CP1~CP4。解多工器DEMUX可依據傾斜開關TS1、TS2所提供的位元信號S0、S1將輸入端的致能信號E1輸出至輸出端Y0~Y3其中之一。位元信號S0、S1與解多工器DEMUX選擇輸出致能信號E1的輸出端Y0~Y3的關係可如下列真值表(表1)所示。 偵測信號 輸出端 S0 S1 Y0 Y1 Y2 Y3 1 1 0 0 0 1 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 表1 Further, the control circuit 104 can be, for example, as shown in FIG. 3 , the control circuit 104 includes a demultiplexer DEMUX and reset circuits RS1 - RS4 . The demultiplexer DEMUX is coupled to the tilt switches TS1 , TS2 , reset circuits RS1 - RS4 and memory chips CP1 - CP4 . The demultiplexer DEMUX can output the enable signal E1 at the input end to one of the output ends Y0-Y3 according to the bit signals S0, S1 provided by the tilt switches TS1, TS2. The relationship between the bit signals S0, S1 and the output terminals Y0~Y3 of the demultiplexer DEMUX selection output enable signal E1 can be shown in the following truth table (Table 1). detection signal output S0 S1 Y0 Y1 Y2 Y3 1 1 0 0 0 1 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 Table 1

舉例來說，當傾斜開關TS1、TS2所提供的位元信號為01(亦即位元信號S0等於0、位元信號S1等於1)時，解多工器DEMUX將致能信號E1由輸出端Y1輸出至重置電路RS2與記憶體晶片CP2。記憶體晶片CP2可被致能信號E1所致能，而記憶體晶片CP1、CP3以及CP4則處於禁能狀態。進一步來說，記憶體晶片CP2可例如圖4所示，包括記憶體402以及電晶體Q1，記憶體402與電晶體Q1串接於電源電壓VCC與接地之間，電晶體Q1的控制端耦接輸出端Y1。當電晶體Q1的控制端自輸出端Y1接收到致能信號時，電晶體Q1進入導通狀態，進而致能記憶體402。For example, when the bit signal provided by the tilt switches TS1 and TS2 is 01 (that is, the bit signal S0 is equal to 0, and the bit signal S1 is equal to 1), the demultiplexer DEMUX will enable the signal E1 from the output terminal Y1 Output to reset circuit RS2 and memory chip CP2. The memory chip CP2 can be enabled by the enable signal E1, while the memory chips CP1, CP3 and CP4 are in a disabled state. Further, the memory chip CP2 may be, for example, as shown in FIG. 4 , including a memory 402 and a transistor Q1. The memory 402 and the transistor Q1 are connected in series between the power supply voltage VCC and ground, and the control terminal of the transistor Q1 is coupled to Output Y1. When the control terminal of the transistor Q1 receives an enable signal from the output terminal Y1 , the transistor Q1 enters a conduction state, thereby enabling the memory 402 .

此外，重置電路RS2可依據致能信號E1改變模式調整通知信號HPD的電壓準位，以告知主機108重新讀取記憶體晶片CP2的延伸顯示識別資料。其中模式調整通知信號HPD在本實施例中為熱插拔偵測接腳HP1上的熱插拔偵測信號，然不以此為限。In addition, the reset circuit RS2 can adjust the voltage level of the notification signal HPD according to the enable signal E1 to change the mode, so as to inform the host 108 to read the extended display identification data of the memory chip CP2 again. The mode adjustment notification signal HPD is the hot plug detection signal on the hot plug detection pin HP1 in this embodiment, but it is not limited thereto.

進一步來說，重置電路RS2的實施方式可例如圖5所示，包括電阻R1~R3、電容C1、C2以及電晶體Q2、Q3。電阻R1與電容C1耦接於輸出端Y1與接地之間。電容C2與電晶體Q2耦接於輸出端Y1與接地之間。電阻R2耦接於電阻R1與電容C1的共同接點與電晶體Q2的控制端之間。電晶體Q3耦接於熱插拔偵測接腳HP1與接地之間。電阻R3耦接於電晶體Q2與電容C2的共同接點與電晶體Q3的控制端之間。如圖6所示，由輸出端Y1輸出的致能信號E1可先透過電容C2與電阻R3導通電晶體Q3，而使熱插拔偵測接腳HP1上的模式調整通知信號HPD轉為低電壓準位。隨著時間經過，電晶體Q2的控制端電壓逐漸上昇至可導通電晶體Q2的電壓，而將電晶體Q3的控制端電壓拉低，使電晶體Q3進入關閉狀態，此時模式調整通知信號HPD轉為高電壓準位。如此藉由將模式調整通知信號HPD由高電壓準位轉為低電壓準位一段預設時間T1，可告知主機108重新讀取記憶體晶片CP2的延伸顯示識別資料。其中預設時間T1可例如由電阻R1~R3的電阻值以及電容C1、C2的電容值決定，預設時間T1可例如為0.5~1ms，然不以此為限。Furthermore, the implementation of the reset circuit RS2 can be, for example, as shown in FIG. 5 , including resistors R1 - R3 , capacitors C1 , C2 , and transistors Q2 , Q3 . The resistor R1 and the capacitor C1 are coupled between the output terminal Y1 and the ground. The capacitor C2 and the transistor Q2 are coupled between the output terminal Y1 and the ground. The resistor R2 is coupled between the common junction of the resistor R1 and the capacitor C1 and the control terminal of the transistor Q2. The transistor Q3 is coupled between the hot plug detection pin HP1 and ground. The resistor R3 is coupled between the common junction of the transistor Q2 and the capacitor C2 and the control terminal of the transistor Q3. As shown in Figure 6, the enable signal E1 output from the output terminal Y1 can first turn on the transistor Q3 through the capacitor C2 and the resistor R3, so that the mode adjustment notification signal HPD on the hot plug detection pin HP1 turns to a low voltage quasi-position. As time goes by, the voltage at the control terminal of transistor Q2 gradually rises to the voltage that can turn on transistor Q2, and the voltage at the control terminal of transistor Q3 is pulled down, so that transistor Q3 enters an off state. At this time, the mode adjustment notification signal HPD to high voltage level. In this way, by changing the mode adjustment notification signal HPD from a high voltage level to a low voltage level for a preset time T1, the host computer 108 can be informed to read the extended display identification data of the memory chip CP2 again. The preset time T1 may be determined, for example, by the resistance values of the resistors R1-R3 and the capacitances of the capacitors C1 and C2, and the preset time T1 may be, for example, 0.5-1 ms, but it is not limited thereto.

類似地，當傾斜開關TS1、TS2所提供的位元信號為11、00、10時，解多工器DEMUX可將致能信號E1由對應的輸出端Y3、Y0、Y2輸出至對應的重置電路與記憶體晶片，重置電路RS1、RS3、RS4以及記憶體晶片CP1、CP3、CP4的實施方式也可例如與圖5、圖4相同，在此不再贅述。Similarly, when the bit signals provided by the tilt switches TS1, TS2 are 11, 00, 10, the demultiplexer DEMUX can output the enable signal E1 from the corresponding output terminals Y3, Y0, Y2 to the corresponding reset The implementation of the circuits and memory chips, reset circuits RS1 , RS3 , RS4 , and memory chips CP1 , CP3 , CP4 can also be the same as those shown in FIG. 5 and FIG. 4 , and will not be repeated here.

圖7是依照本發明的實施例的一種顯示裝置的顯示方法流程圖。顯示裝置包括多個記憶體晶片，各記憶體晶片儲存的延伸顯示識別資料對應不同的顯示裝置的擺放狀態。由上述實施例可知，顯示裝置的顯示方法可至少包括下列步驟。首先，偵測顯示裝置的擺放狀態(步驟S702)，例如可透過偵測顯示裝置的旋轉角度來偵測顯示裝置的擺放狀態為水平或垂直。在部分實施例中，可利用兩個傾斜開關來偵測顯示裝置的擺放狀態，透過偵測兩個傾斜開關可判斷顯示裝置的擺放狀態。接著，依據所偵測的擺放狀態致能對應的記憶體晶片(步驟S704)，例如可依據兩個傾斜開關所提供的2位元的偵測信號來判斷顯示裝置的擺放狀態。然後，輸出模式調整通知信號給主機，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料(步驟S706)。例如可改變模式調整通知信號的電壓準位，將模式調整通知信號的由高電壓準位轉為低電壓準位一段預設時間，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料，模式調整通知信號可例如為熱插拔偵測信號，然不以此為限。FIG. 7 is a flowchart of a display method of a display device according to an embodiment of the present invention. The display device includes a plurality of memory chips, and the extended display identification data stored in each memory chip corresponds to different placement states of the display device. It can be known from the above embodiments that the display method of the display device may at least include the following steps. Firstly, detect the placement state of the display device (step S702 ), for example, detect whether the display device is placed horizontally or vertically by detecting the rotation angle of the display device. In some embodiments, two tilt switches can be used to detect the placement status of the display device, and the placement status of the display device can be determined by detecting the two tilt switches. Next, the corresponding memory chip is enabled according to the detected arrangement state (step S704 ), for example, the arrangement state of the display device can be determined according to the 2-bit detection signal provided by the two tilt switches. Then, output a mode adjustment notification signal to the host to inform the host to reread the extended display identification data of the enabled memory chip (step S706 ). For example, the voltage level of the mode adjustment notification signal can be changed, and the mode adjustment notification signal can be changed from a high voltage level to a low voltage level for a preset period of time to inform the host to re-read the extended display of the enabled memory chip The identification data and the mode adjustment notification signal can be, for example, a hot plug detection signal, but are not limited thereto.

綜上所述，本發明實施例的顯示裝置包括多個記憶體晶片，顯示裝置可依據顯示裝置的擺放狀態致能對應的記憶體晶片，並輸出模式調整通知信號給主機，以告知主機重新讀取被致能的記憶體晶片的延伸顯示識別資料。如此，可在顯示裝置的擺放狀態改變時，使主機主動地重新讀取延伸顯示識別資料，以傳送對應的顯示資料，使顯示裝置對應擺放狀態的改變調整畫面顯示方向，而正確地顯示影像畫面。To sum up, the display device according to the embodiment of the present invention includes a plurality of memory chips, and the display device can enable the corresponding memory chip according to the placement state of the display device, and output a mode adjustment notification signal to the host to inform the host to reset Read the extended display identification data of the enabled memory chip. In this way, when the placement state of the display device changes, the host can actively re-read the extended display identification data to transmit the corresponding display data, so that the display device can adjust the display direction of the screen corresponding to the change of the placement state, and display correctly. video screen.

102：顯示裝置 104：控制電路 106：狀態偵測模組 108：主機 402：記憶體 CP1~CP4：記憶體晶片 HPD：模式調整通知信號 TS1、TS2：傾斜開關 DEMUX：解多工器 RS1~RS4：重置電路 S0、S1：位元信號 E1：致能信號 Y0~Y3：輸出端 Q1、Q2、Q3：電晶體 HP1：熱插拔偵測接腳 R1~R3：電阻 C1、C2：電容 S702~S706：顯示裝置的顯示方法步驟102: Display device 104: Control circuit 106: Status detection module 108: Host 402: Memory CP1~CP4: Memory chip HPD: Mode adjustment notification signal TS1, TS2: Tilt switch DEMUX: Demultiplexer RS1~RS4 : Reset circuit S0, S1: Bit signal E1: Enable signal Y0~Y3: Output terminal Q1, Q2, Q3: Transistor HP1: Hot plug detection pin R1~R3: Resistor C1, C2: Capacitor S702 ~S706: Steps of the display method of the display device

圖1是依照本發明的實施例的一種顯示裝置的示意圖。 圖2A~2D是依照本發明另一實施例的顯示裝置的示意圖。 圖3是依照本發明另一實施例的顯示裝置的示意圖。 圖4是依照本發明的實施例的一種記憶體晶片的示意圖。 圖5是依照本發明的實施例的一種重置電路的示意圖。 圖6是依照本發明的實施例的一種模式調整通知信號的波形圖。 圖7是依照本發明的實施例的一種顯示裝置的顯示方法流程圖。FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention. 2A-2D are schematic diagrams of a display device according to another embodiment of the present invention. FIG. 3 is a schematic diagram of a display device according to another embodiment of the invention. FIG. 4 is a schematic diagram of a memory chip according to an embodiment of the invention. FIG. 5 is a schematic diagram of a reset circuit according to an embodiment of the invention. FIG. 6 is a waveform diagram of a mode adjustment notification signal according to an embodiment of the present invention. FIG. 7 is a flowchart of a display method of a display device according to an embodiment of the present invention.

102：顯示裝置 104：控制電路 106：狀態偵測模組 108：主機 CP1~CP4：記憶體晶片 HPD：模式調整通知信號 102: display device 104: Control circuit 106: Status detection module 108: Host CP1~CP4: memory chips HPD: mode adjustment notification signal