CN109202296B - Texture processing method of protective cover plate - Google Patents

Referring to fig. 1, a flow chart of a texture processing method of a

110 according to a first embodiment of the invention is shown. The texture processing method of the

110 according to the embodiment of the present invention may be applied to any device having a protective cover plate, for example: electronic devices having a display function, such as tablet computers, mobile phones, electronic readers, Personal Computers (PCs), notebook computers, televisions, and wearable devices. In this embodiment, the

110 is disposed outside the camera or the fingerprint module of the electronic device, and the camera or the fingerprint module is exposed to the outside through the

110.

The texture processing method of the

110 provided by the first embodiment of the present invention includes:

s11: and laser forming a texture pattern on a preset area of the

110. It is understood that in other embodiments, a step of providing the

110 without the grain pattern may be included before the step S11. The

110 in the present embodiment is an aluminum-silicon, sodium-calcium or borosilicate glass cover plate.

In the present embodiment, step S11 includes: and laser-etching a predetermined concave-convex texture pattern on a predetermined area of the

110 by removing a surface material of the

110 with laser. According to the invention, the

110 is processed in a non-contact manner by adopting laser to form the texture pattern, so that the base body of the

110 is not damaged, and the quality and the yield of the

110 are improved. In addition, laser processing is utilized, processing technological parameters are controllable, and the definition of texture patterns formed by processing is high.

Specifically, step S11 includes: presetting laser etching patterns and technological parameters according to the texture patterns and the effect thereof; placing the

110 to be processed on a working platform of laser etching equipment, starting the laser etching equipment, focusing laser on the protective cover plate to be processed and scanning the protective cover plate, and removing the surface material of the

110 through the laser in the preset area to laser out a preset concave-convex texture pattern.

In the present embodiment, the laser is focused on the surface of the

110. The laser etching equipment is provided with a laser emitting system consisting of a

800, a beam expanding lens, a vibration lens group and a focusing lens, the relative position between the laser focusing point and the surface of the glass to be processed is adjusted by a lifting body, and the focusing lens is used for enabling the laser to be always focused on the surface of the glass to be processed. The

800, the vibration mirror group and the working platform are respectively controlled by an industrial personal computer. The repetition frequency of the laser pulse is 10 kHz-30 kHz, and the scanning speed of the laser is more than 500 mm/s.

In order to improve the definition and the three-dimensional effect of the texture pattern, the grain width b of the texture pattern is larger than 25 micrometers, the grain interval d is larger than 25 micrometers, and the grain depth c is larger than 5 micrometers. In this embodiment, the grain width b of the grain pattern is 30 micrometers, the grain interval d is 30 micrometers, and the grain depth c is 10 micrometers. It is understood that in other embodiments, the dimensions of the ridge width b, the ridge spacing d, and the ridge depth c may be selected to satisfy other values within the above ranges. In addition, the distance a between the grain pattern and the edge of the

110 is greater than a predetermined value, so as to prevent the laser spot from drifting out of the

110.

The

800 emits ultraviolet laser with the wavelength of 355nm, the diameter range of laser spots of the laser is 10-60 microns, and the minimum diameter of the laser spots reaches 10 microns through adjustment of the beam expander. And the line width b is larger than the laser spot diameter of the laser. In this embodiment, the grain width b is 30 micrometers, and the laser spot diameter is required to be smaller than 30 micrometers. It is understood that in other embodiments, the laser spot diameter size may be selected to be other values less than the ridge width b.

S12: and (3) placing the

110 into the 380-420 ℃

130 for salt bath to chemically strengthen the

110 with the texture pattern on the surface. The

130 is contained in a high temperature resistant container, and includes a molten salt for glass strengthening. During the temperature rise to 380-420 ℃, the

130 is transformed from a solid state to a liquid state. The

110 is immersed in a salt bath in the

130, and ions on the surface of the

110 are exchanged with ions in the

130, so that a pressure stress layer is formed on the

110. The compressive stress layer greatly improves the bending resistance of the chemically strengthened

110 and the texture patterns thereon. The use of the chemically strengthened

110 as the cover glass of the electronic device can prevent the cover glass from being deformed when the electronic device falls from a high place, and the cover glass is not broken. In this embodiment, the

130 includes potassium nitrate or sodium nitrate. It is understood that in other embodiments, the salt-type molten salt may include at least one of lithium ion, sodium ion, or potassium ion.

S13: the

140 is plated on the texture pattern, and the

140 improves the transmittance of incident light in a specific wavelength range and reflects the incident light in a specified wavelength range. In this embodiment, the

140 is used for reflecting light blue and violet light. It is understood that in other embodiments, the

140 may be configured to reflect deep red, deep blue, deep yellow, and deep green incident light. The dark

140 can increase the transmittance of blue light and red light at two ends of the spectrum at the same time, and only yellow green light in the middle of the spectrum is reflected, so that the transmittance curve of the

140 has two peak increasing values of red and blue, and the color gamut is effectively enlarged along the wide color range. In addition, the

140 allows a user to view a texture pattern and simultaneously display a colorful dazzling effect when the user changes the visual angle.

S14: printing

150 on the

140. The

150 is applied on the

110 to provide a background color. Specifically, in this embodiment, the

110 may be adhered and fixed to the surface of the electronic device through a back adhesive, and the

150 is coated on an edge area of the

110 to shield the back adhesive between the

110 and the electronic device. It is understood that in other embodiments, the

110 may be fixed to the surface of the electronic device by a snap or other structure, and the

150 is applied to the edge region of the

110 to block the fixing structure between the

110 and the electronic device. In this embodiment, the

140 is printed with

150 by screen printing. The screen printing equipment is simple, the operation is convenient, the printing and the plate making are simple and easy, the cost is low, and the adaptability is strong.

Referring to fig. 2, a flow chart of a texture processing method of the

210 according to a second embodiment of the invention is shown. The texture processing method of the

210 according to the second embodiment includes the following steps:

s21: and laser forming a texture pattern on a preset area of the

210.

S22: and placing the

210 into the 380-420 ℃

230 for salt bath.

S23: and plating a

240 on the back of the region corresponding to the texture pattern, wherein the

240 improves the transmittance of incident light in a specific wavelength range and reflects the incident light in a specified wavelength range. In this embodiment, the

240 is used to reflect light blue-violet light. It is understood that in other embodiments, the

240 may be configured to reflect deep red, deep blue, deep yellow, and deep green incident light. The dark

240 can increase the transmittance of blue light and red light at two ends of the spectrum, and only yellow green light in the middle of the spectrum is reflected, so that the transmittance curve of the

240 has two peak increasing values of red and blue, and the color gamut is effectively wide. In addition, the

240 allows a user to view a texture pattern and a color flare effect when the user changes the viewing angle.

S24: printing

250 on the

240. The

250 is applied to the

210 to provide a background color. Specifically, in this embodiment, the texture pattern on the

210 is exposed on the surface of the electronic device. The

210 can be fixed on the surface of the electronic device by back adhesive bonding, and the

150 is coated on the edge area of the

210 to shield the back adhesive between the

210 and the electronic device. It is understood that in other embodiments, the

210 may be fixed to the surface of the electronic device by a snap or other structure, and the

150 is applied to the edge area of the

210 to block the fixing structure between the

210 and the electronic device. In this embodiment, the

140 is printed with

150 by screen printing. The screen printing equipment is simple, the operation is convenient, the printing and the plate making are simple and easy, the cost is low, and the adaptability is strong.

Referring to fig. 3, a flow chart of a texture processing method of the

310 according to a third embodiment of the invention is shown. The texture processing method of the

310 provided by the third embodiment comprises the following steps:

s31: and laser forming a texture pattern on a preset area of the

310.

Wherein the

310 is a sapphire cover plate that is wear-resistant. Compared with common glass, the sapphire cover plate has higher hardness, chemical corrosion resistance, high temperature resistance, good heat conduction, high hardness and infrared transmission, is applied to instruments such as night vision infrared and far infrared sighting telescope, night vision camera and the like, and instruments and meters of satellite and space technology, and is used as a window of a high-power laser, various optical prisms, optical windows, UV and IR windows and lenses, an observation port of a low-temperature experiment and the like.

S32: and plating a

340 on the texture pattern.

S33: printing

350 on the

340.

Referring to fig. 4, fig. 4 is a flowchart illustrating a texture processing method of a protective cover 410 according to a fourth embodiment of the invention. The texture processing method of the

310 provided by the fourth embodiment comprises the following steps:

1. A method of texturing a protective cover sheet, the method comprising:

laser is carried out on a preset area of the protective cover plate to form a texture pattern;

plating a film coating layer on the back of the area corresponding to the texture pattern, wherein the film coating layer can improve the transmittance of incident light in a specific wavelength range, reflect the incident light in a specified wavelength range, and enable a user to show a colorful dazzling effect while watching the texture pattern when changing the visual angle;

printing ink on the coating layer.

2. The method of claim 1, wherein laser-patterning a predetermined area of the protective cover comprises:

and removing the surface material of the protective cover plate in a preset area of the protective cover plate through laser to laser out a preset concave-convex texture pattern.

3. The method of texturing a protective cover sheet according to claim 1, wherein the protective cover sheet is a sapphire cover sheet.

4. The method for texturing a protective cover sheet according to claim 1, wherein the protective cover sheet is an aluminum-silicon, sodium-calcium, or borosilicate glass cover sheet.

5. The method for texturing a protective cover according to claim 4, wherein after the step of laser-patterning a predetermined area of the protective cover and before the step of plating a coating layer on the back surface of the area corresponding to the textured pattern, the method further comprises:

and placing the protective cover plate into 380-420 ℃ molten salt for salt bath.

6. The method of texturing a protective cover sheet according to claim 1, wherein the grain width of the grain pattern is greater than 25 microns and the grain depth of the grain pattern is greater than 5 microns.

7. The method of texturing a protective cover sheet according to claim 1, wherein the laser spot diameter of the laser is 10 to 60 μm.

8. The method of texturing a protective cover sheet according to claim 1, wherein the printing ink on the coating layer comprises:

printing ink on the coating layer by adopting a screen printing mode.

9. The texturing method of a protective cover according to any one of claims 1 to 8, wherein the protective cover is disposed above a camera or a fingerprint module of a terminal.