Portable multifunction display panel and a liquid crystal display device adopting the same

• US 20060139524A1
• Filed: 10/28/2005
• Published: 06/29/2006
• Est. Priority Date: 12/28/2004
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Ga-Lane
• Application Number:
  US11/261,096
• Publication Number:
  US 20060139524A1
• Time in Patent Office: Days
• US Class Current: 349/114
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133507 Films for enhancing the luminance
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials

Abstract

A liquid crystal display device (20) includes a display panel (22) and a backlight module (21) positioned below the display panel. The display panel includes a lower substrate (221), an upper substrate (227) and a liquid crystal layer (224) sandwiched therebetween. One region of a surface of the lower substrate facing the liquid crystal layer is coated with a transmissive layer (2201), and the other region thereof is coated with a reflective layer (2202). In sunlight or in an ambient environment, the sunlight light or the ambient light is reflected by the reflective layer. In a dark or in a dim environment, uniform light beams originating from the backlight module are transmitted through the transmissive layer. The transmissive layer and the reflective layer are in a same plane, helping to ensure that the display panel has a small thickness and a small bulk. Therefore, the liquid crystal display device is readily portable.

Claims

1. A display panel comprising:

a lower substrate having an inner surface, the inner surface having a first inner surface region and a second inner surface region;

an upper substrate opposite to the lower substrate;

a liquid crystal layer sandwiched between the lower substrate and the upper substrate;

a transmissive layer formed on the first inner surface region of the lower substrate;

a reflective layer formed on the second inner surface region of the lower substrate, the reflective layer being substantially coplanar with the transmissive layer.

2. The display panel as claimed in claim 1, wherein the transmissive layer is comprised of at least one of indium-tin oxide and silicon dioxide.

3. The display panel as claimed in claim 1, wherein the reflective layer is comprised of a matrix with nano-particles dispersed therein, the nano-particles promoting reflection of light.

4. The display panel as claimed in claim 3, wherein a size of each nano-particle is in the approximate range of from 2 to 100 nanometers.

5. The display panel as claimed in claim 4, wherein the size of each nano-particle is about in the range of from 5 to 20 nanometers.

6. The display panel as claimed in claim 3, wherein the matrix is comprised of at least one of Indium indium-tin oxide and silicon dioxide, the nano-particle each being comprised of at least one of aluminum and silver.

7. The display panel as claimed in claim 1, wherein a thickness of each of the transmissive layer and the reflective layer is about in the range of from 100 to 500 nanometers.

8. The display panel as claimed in claim 1, wherein a lower polarizer plate is positioned on an outer surface of the lower substrate.

9. The display panel as claimed in claim 1, wherein a thin film transistor is positioned on the transmissive layer and on the reflective layer.

10. The display panel as claimed in claim 1, wherein a lower alignment film and a lower transparent electrode are positioned, in order, below the liquid crystal layer, and an upper alignment film and an upper transparent electrode are arranged upon the liquid crystal layer, in turn.

11. The display panel as claimed in claim 10, wherein the upper alignment film and the lower alignment film are homogeneous alignment films and are comprised of polyimide.

12. The display panel as claimed in claim 10, wherein the upper transparent electrode and the lower transparent electrode are comprised of indium-tin oxide.

13. The display panel as claimed in claim 1, wherein a color filter is positioned on an inner surface of the upper substrate, an upper polarizer plate, an anti-glare layer and an anti-reflection layer being positioned, in order, on an outer surface of the upper substrate.

14. A liquid crystal display device comprising:

a display panel comprising;

a lower substrate having an inner surface, the inner surface thereof having a transmissive layer and a reflective layer both formed directly thereon;

an upper substrate opposite to the lower substrate; and

a liquid crystal layer sandwiched between the lower substrate and the upper substrate; and

a backlight module positioned below the display panel.

15. The liquid crystal display device as claimed in claim 14, further comprising a dual light control device electrically connected with the backlight module, the dual light control device being configured for selectively turning on and turning off the backlight module based upon a degree of brightness of light sensed by the dual light control device.

16. The liquid crystal display device as claimed in claim 14, wherein the backlight module comprises a light guide plate and a light source positioned adjacent the light guide plate.

17. The liquid crystal display device as claimed in claim 16, wherein a reflective plate is situated below the light guide plate, and a diffusion plate, a bright-enhancement-film and a double-bright-enhancement-film are positioned, in order, upon the light guide plate.

18. The liquid crystal display device as claimed in claim 14, wherein the transmissive layer is comprised of at least one of indium-tin oxide and silicon dioxide, and the reflective layer has a matrix comprised of at least one of indium-tin oxide and silicon dioxide, the matrix further having nano-particles dispersed therein.

19. The liquid crystal display device as claimed in claim 18, wherein a size of each nano-particle is in the approximate range of from 2 to 100 nanometers.

20. The liquid crystal display device as claimed in claim 14, wherein a thickness of each of the transmissive layer and the reflective layer is about in the range of from 100 to 500 nanometers.