Plane display device with touch panel

• US 20040109097A1
• Filed: 12/10/2002
• Published: 06/10/2004
• Est. Priority Date: 12/10/2002
• Status: Abandoned Application

• Current Assignee: Toppoly Optoelectronics Corporation (InnoLux Corporation)
• Original Assignee: Toppoly Optoelectronics Corporation (InnoLux Corporation)
• Inventors: Mai, Che-Kuei
• Application Number:
  US10/315,110
• Publication Number:
  US 20040109097A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133616 Front illuminating devices
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 2203/02 reflective

Abstract

A plane display device with touch panel uses a light guide plate of front light of LCD as the substrate of touch panel to replace the glass substrate of conventional touch panel.

Claims

1. A planar display device with touch panel, comprising:

a reflective-type LCD display device having;

a transparent substrate; and

a light source located at the lateral end of said transparent substrate; and

a touch panel on said reflective-type LCD display device including;

a first transparent conductive layer on said transparent substrate;

an adhered layer on said first transparent conductive layer; and

a second transparent conductive layer on said adhered layer wherein said transparent substrate is used as the substrate of said touch panel.

2. The planar display device with touch panel according to claim 1, wherein said transparent substrate is used as the light guide plate.

3. The planar display device with touch panel according to claim 2 further comprising a transparent film located between said transparent substrate and said first transparent conductive layer.

4. The planar display device with touch panel according to claim 3, wherein the material of said transparent film is a transparent resin.

5. The planar display device with touch panel according to claim 3, wherein said transparent film is made for planarizing said transparent substrate.

6. The planar display device with touch panel according to claim 3, wherein the refractive indices of said light guide plate and said transparent film are different.

7. The planar display device with touch panel according to claim 2 further comprising a polarizing plate located between said light source and the lateral end of said light guide plate.

8. The planar display device with touch panel according to claim 7 further comprising a retardation film located between said polarizing plate and the lateral end of said light guide plate.

9. The planar display device with touch panel according to claim 2 further comprising a retardation film located between said light source and the lateral end of said light guide plate.

10. The planar display device with touch panel according to claim 2, wherein said reflective-type LCD includes a color filter below said light guide plate.

11. The planar display device with touch panel according to claim 10, wherein the refractive indices of said light guide plate and said color filter are different.

12. The planar display device with touch panel according to claim 2, wherein the material of said light guide plate is plastic.

13. The planar display device with touch panel according to claim 2 further comprising a transparent plate below said light guide plate, wherein the hardness of said transparent plate is larger than the hardness of said light guide plate.

14. The planar display device with touch panel according to claim 13, wherein the material of said light guide plate is an UV curable resin.

15. The planar display device with touch panel according to claim 13, wherein the material of said transparent plate is a transparent glass.

16. The planar display device with touch panel according to claim 1, wherein said light source includes two lights located at the opposite ends of said transparent substrate respectively.

17. A structure of front light of LCD panel device with touch panel, comprising:

a first substrate;

a matrix thin film transistor on said first substrate;

a liquid crystal layer on said matrix thin film transistor;

a second transparent substrate on said liquid crystal layer;

a light source located at the lateral end of said second transparent substrate;

a polarizing plate located between said light source and said second transparent substrate;

a retardation film located between said polarizing plate and said second transparent substrate;

a transparent film on said second transparent substrate;

a first transparent conductive layer on said transparent film;

an adhered layer on said first transparent conductive layer; and

a second transparent conductive layer on said adhered layer.

18. The structure of front light of LCD panel device with touch panel according to claim 17, wherein said first substrate, said matrix thin film transistor, said liquid crystal layer, said second transparent substrate, said light source, said polarizing plate, said retardation film and said transparent film are the components of said front light of LCD panel.

19. The structure of front light of LCD panel device with touch panel according to claim 18, wherein said transparent film, said first transparent conductive layer, said adhered layer and said second transparent conductive layer are the components said touch panel.