Inverted LCD structure for VR
View Patent ↗A liquid crystal display (LCD) is configured for use in a head mounted display (HMD) to increase the brightness and improve power consumption of the LCD by recycling light. The LCD includes a color filter (CF) substrate, a thin film transistor (TFT) substrate, and a backlight unit (BLU). The CF substrate is closer to the BLU than the TFT substrate. The CF substrate includes a first reflective layer in regions of the CF substrate between pixels to reflect light back towards the BLU to be recycled to increase the brightness of the LCD. The TFT substrate includes TFTs to drive the pixels and a second reflective layer covering TFTs to reflect light away from the TFTs.
1. A liquid crystal display device, comprising:
a liquid crystal panel including:
a thin film transistor (TFT) substrate including a plurality of TFTs disposed on the TFT substrate for driving a plurality of pixels of the liquid crystal panel;
a color filter substrate including a first reflective layer in regions of the color filter substrate between the plurality of pixels, wherein the color filter substrate further comprises a first surface and a second surface opposite the first surface, and the first reflective layer is disposed on the first surface of the color filter substrate and is in contact with liquid crystal material; and
the liquid crystal material disposed between the color filter substrate and the TFT substrate; and
a backlight unit disposed under the liquid crystal panel, wherein the color filter substrate of the liquid crystal panel is closer to the backlight unit than the TFT substrate.
2. The liquid crystal display device of claim 1 , wherein the first reflective layer is a dielectric mirror.
3. The liquid crystal display device of claim 1 , wherein the first reflective layer is a metal mirror.
4. The liquid crystal display device of claim 1 , wherein the TFT substrate further comprises a second reflective layer in regions of the TFT substrate covering the plurality of TFTs.
5. The liquid crystal display device of claim 4 , wherein the second reflective layer is a dielectric mirror.
6. The liquid crystal display device of claim 4 , wherein the TFT substrate further comprises a third surface and a fourth surface opposite the third surface, and the plurality of TFTs and the second reflective layer are disposed on the third surface of the TFT substrate adjacent to the liquid crystal material.
7. The liquid crystal display device of claim 1 , wherein the color filter substrate does not include a black matrix.
8. A head-mounted display (HMD) including the liquid crystal display device of claim 1 and an optics block configured to direct light from the liquid crystal display to an exit pupil of the HMD.
9. A liquid crystal display device, comprising:
a liquid crystal panel including:
a thin film transistor (TFT) substrate including a plurality of TFTs disposed on the TFT substrate to drive a plurality of pixels;
a color filter substrate including a first reflective layer in regions between the plurality pixels, wherein the color filter substrate further comprises a first surface and a second surface opposite the first surface, and the first reflective layer is disposed on the first surface of the color filter substrate and is in contact with liquid crystal material; and
the liquid crystal material disposed between the color filter substrate and the TFT substrate; and
a backlight unit disposed under the liquid crystal panel, wherein the first reflective layer is configured to reflect light from the backlight unit back towards the backlight unit to increase light output from the liquid crystal display device.
10. The liquid crystal display device of claim 9 , wherein the first reflective layer is a dielectric mirror.
11. The liquid crystal display device of claim 9 , wherein the first reflective layer is a metal mirror.
12. The liquid crystal display device of claim 9 , wherein the color filter substrate does not include a black matrix.
13. The liquid crystal display device of claim 9 , wherein the TFT substrate further comprises a second reflective layer in regions of the TFT substrate covering the plurality of TFTs.
14. A liquid crystal display device, comprising:
a liquid crystal panel including:
a color filter substrate;
a thin film transistor (TFT) substrate including a plurality of TFTs disposed on the TFT substrate to drive a plurality of pixels and a first reflective layer covering the plurality of TFTs, wherein the TFT substrate further comprises a first surface and a second surface opposite the first surface, and the plurality of TFTs and the first reflective layer are disposed on the first surface of the TFT substrate adjacent to liquid crystal material; and
the liquid crystal material disposed between the color filter substrate and the TFT substrate; and
a backlight unit disposed under the liquid crystal panel, wherein the first reflective layer is configured to reflect light from the backlight unit away from the plurality of TFTs.
15. The liquid crystal display device of claim 14 , wherein the first reflective layer is a dielectric mirror.
16. The liquid crystal display device of claim 14 , wherein the color filter substrate further comprises a second reflective layer in regions of the color filter substrate between the plurality of pixels.