Liquid crystal display comprising a light channel formed through a stack including at least a color film layer, a thin-film-transistor layer, and a backlight and electronic device having the same

Patent metadata

Field	Value
Publication number	US-11994902-B2
Application number	US-202217666922-A
Country	US
Kind code	B2
Filing date	Feb 8, 2022
Priority date	Apr 25, 2017
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A liquid crystal display (LCD) includes several transparent material layers and several non-transparent material layers that are disposed in a stacked mode. The LCD also has a local transparent region, and no non-transparent material is applied to the several non-transparent material layers in the local transparent region. This forms a transparent channel in the local transparent region along a stacking direction. An optical component is completely or partially disposed in the transparent channel of the LCD display. The optical component may be a camera, an ambient light sensor, an optical fingerprint sensor, or another component disposed under the display by using the local transparent region on the LCD display.

First claim

The invention claimed is:

1. An apparatus, comprising:
a liquid-crystal display (LCD) comprising a cover glass (CG), a first glass substrate, a color film (CF) layer, a thin-film transistor (TFT) layer, a second glass substrate, and a backlight sequentially formed in a stack, wherein at least the CF layer, the TFT layer, and the backlight comprise through holes to form a light channel in the LCD; and
an optical component completely or partially disposed at a position in the backlight, completely covered on one side by the CG and the first glass substrate, and configured to receive ambient light that passes through the CG, the first glass substrate, and the light channel from outside of the apparatus, wherein a space between the CG and the first glass substrate comprises a pin-through-hole and does not comprise any portion of the optical component.

2. The apparatus of claim 1 , wherein the optical component is further disposed beneath the through holes in the CF and the TFT layer and is configured to receive the ambient light that passes through the through holes in the CF and the TFT layer.

3. The apparatus of claim 1 , wherein the second glass substrate further comprises the through holes, and wherein the optical component is further completely or partially disposed in the second glass substrate.

4. The apparatus of claim 1 , wherein the LCD further comprises a metal line, and wherein the metal line is distributed around the light channel and is between the TFT layer and the CF layer.

5. The apparatus of claim 4 , wherein the CG comprises an inner surface, wherein the light channel comprises a circumference, wherein the apparatus further comprises a material that shields the metal line, wherein the material is disposed on the inner surface and is disposed around the circumference, and wherein the material is configured to prevent liquid crystal leakage.

6. The apparatus of claim 1 , wherein the CG comprises a lower surface, wherein the LCD further comprises a first polarizer and a second polarizer, and wherein the first polarizer, the first glass substrate, the CF, the TFT layer, the second glass substrate, the second polarizer, and the backlight are sequentially formed on the lower surface.

7. The apparatus of claim 1 , wherein the first glass substrate comprises a lower surface, wherein the second glass substrate comprises an upper surface, and wherein the apparatus further comprises a first iridium titanium oxide (ITO) material layer formed on the lower surface and a second ITO material layer formed on the upper surface.

8. The apparatus of claim 1 , wherein the optical component comprises an optical fingerprint sensor, a front camera, an optical proximity sensor, a structured light sensor, an infrared laser transmitter, or an ambient light sensor.

9. The apparatus of claim 1 , wherein the LCD comprises a rectangular display region having a length-to-width ratio of 16:9 or 18:9.

10. An apparatus, comprising:
a stack comprising a cover glass (CG), a first glass substrate, a color film (CF) layer, a thin film transistor (TFT) layer, a second glass substrate, and a backlight; and
a light channel covered by the CG and the first glass substrate and formed in the stack by through holes provided through at least the CF layer, the TFT layer, and the backlight and configured to receive and pass ambient light that passes through the CG and the first glass substrate, wherein surfaces of the CG and the first glass substrate are continuous through the light channel, and wherein a space between the CG and the first glass substrate comprises a pin-through-hole.

11. The apparatus of claim 10 , wherein the through holes are further provided through the second glass substrate.

12. The apparatus of claim 10 , further comprising a metal line, and wherein the metal line is distributed around the light channel and is between the TFT layer and the CF layer.

13. The apparatus of claim 12 , wherein the CG comprises an inner surface, wherein the light channel comprises a circumference, wherein the apparatus further comprises a material that shields the metal line, wherein the material is disposed on the inner surface and is disposed around the circumference, and wherein the material is configured to prevent liquid crystal leakage.

14. The apparatus of claim 10 , further comprising a first polarizer and a second polarizer, wherein the CG comprises a lower surface, and wherein the first polarizer, the first glass substrate, the CF, the TFT layer, the second glass substrate, the second polarizer, and the backlight are sequentially formed on the lower surface.

15. The apparatus of claim 10 , further comprising a first iridium titanium oxide (ITO) material layer and a second ITO material layer, wherein the first glass substrate comprises a lower surface, wherein the second glass substrate comprises an upper surface, wherein the first ITO material layer is formed on the lower surface, and wherein the second ITO material layer is formed on the upper surface.

16. The apparatus of claim 10 , further comprising a rectangular display region having a length-to-width ratio of 16:9 or 18:9.

17. An apparatus, comprising:
a liquid crystal display (LCD) comprising a cover glass (CG), a first glass substrate, a color film (CF) layer, a thin film transistor (TFT) layer, a second glass substrate, and a backlight sequentially formed in a stack, wherein at least the CF layer, the TFT layer, and the backlight comprise through holes forming a light channel in the LCD, wherein the light channel is configured to receive and pass ambient light that passes through the CG and the first glass substrate, wherein surfaces of the CG and the first glass substrate are continuous through the light channel, and wherein a space between the CG and the first glass substrate comprises a pin-through-hole; and
a metal line distributed around the light channel and between the TFT layer and the CF layer.

18. The apparatus of claim 17 , further comprising an optical component completely or partially disposed at a position in the backlight, completely covered on one side by the CG and the first glass substrate, and configured to receive the ambient light that passes through the CG, the first glass substrate, and the light channel from outside of the apparatus, wherein the optical component comprises an optical fingerprint sensor, a front camera, an optical proximity sensor, a structured light sensor, an infrared laser transmitter, or an ambient light sensor.

19. The apparatus of claim 17 , further comprising an optical component disposed within the backlight and covered by the CG, the first glass substrate, and the second glass substrate.

20. The apparatus of claim 17 , further comprising an optical component disposed within the light channel and covered by the first glass substrate.

Assignees

• Huawei Tech Co Ltd

Inventors

• Yin Bangshi
• Yang Fan
• Yan Bin
• Xue Kangle
• Chen Xiaomeng

Classifications

• G06F1/1605 Primary

  Multimedia displays, e.g. with integrated or attached speakers, cameras, microphones · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/133528

  Polarisers · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title