LIQUID CRYSTAL DISPLAY AND INPUT DEVICE WITH ELASTIC MEMBER THEREBETWEEN

• US 20010020985A1
• Filed: 07/20/1998
• Published: 09/13/2001
• Est. Priority Date: 11/21/1996
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: HINATA, SHOJI
• Granted Patent: US 6,369,865 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A liquid crystal (L) is sealed in a cell gap to be formed between a pair of transparent substrates (8a), (8b) to constitute a liquid crystal display device (2). Another plastic film (17b) of an input device (3) in which one plastic film (17a) is pressed by a pen (21), etc. under the instruction of the positional information is stacked on the liquid crystal display device (2) across a transparent elastic member (4), and a liquid crystal display device (1) is formed thereby. Both the descriptive durability and the input touch of a film-film type input device are improved at the same time. When the transparent substrates (8a),(8b) are formed of flexible material, the external force is prevented from being applied to the flexible transparent substrates (8a),(8b) easy to be locally deformed by absorbing the external force to be applied to the input device (3) by the transparent elastic member (4).

Claims

1. An input device having a pair of plastic films stacked on each other with a clearance one plastic film of which is pressed under the instruction of the positional information and the other plastic film of which is stacked on a visible information display means, wherein a transparent elastic member is provided on the surface of the plastic film on the side to be stacked on the visible information display means.

2. The input device according to

claim 1

, wherein the transparent elastic member is made of silicone rubber.

3. The input device according to

claim 1

, wherein the thickness of the transparent elastic member is not less than 0.5 mm to less than 2 mm.

4. The input device according to one of

claims 1

to

3

, wherein the Young'"'"'s modulus of the transparent elastic member is not less than 1×

10⁴ N/m² to less than 1×

10⁸ N/m².

5. A liquid crystal display device, comprising:

a liquid crystal display means having a pair of transparent substrates opposite to each other forming a cell gap therebetween and a liquid crystal sealed in the cell gap; and

an input means having a pair of plastic films stacked on each other with a clearance therebetween, one plastic film of which is pressed under the instruction of the positional information and the other plastic film of which is stacked on said visible information display means, wherein the transparent elastic member is provided between said liquid crystal display means and said input means.

6. The liquid crystal display device according to

claim 5

, wherein the transparent elastic member is made of silicone rubber.

7. The liquid crystal display device according to

claim 5

or

6

, wherein the thickness of the transparent elastic member is not less than 0.5 mm to less than 2 mm.

8. The liquid crystal display device according to one of

claims 5

to

7

, wherein the Young'"'"'s modulus of the transparent elastic member is not less than 1×

10⁴ N/m² to less than 1×

10⁸ N/m².

9. An electronic device having the liquid crystal display device according to one of

claims 5

to

8

.

10. The liquid crystal display device having a pair of flexible transparent substrates opposite to each other forming a cell gap and a liquid crystal sealed in the cell gap, comprising:

a transparent elastic member which is arranged on the outer side of one flexible transparent substrate and uniformly covers the flexible transparent substrate; and

a transparent covering member to uniformly cover the transparent covering member.

11. The liquid crystal display device according to

claim 10

, wherein the transparent covering member is lower in elasticity than the transparent elastic member.

12. The liquid crystal display device according to

claim 10

or

11

, wherein the transparent covering member is a protective plate to protect the flexible transparent substrate.

13. The liquid crystal display device according to

claim 10

or

11

, wherein the transparent covering member is an input device having a pair of transparent substrates stacked on each other with a clearance, and one of the transparent substrates is arranged on the outer side of the flexible transparent substrate so as to uniformly cover said flexible transparent substrate.

14. The liquid crystal display device according to

claim 10

or

11

, wherein the transparent elastic member is arranged in contact with the outer side of the flexible transparent substrate, and the transparent covering member is arranged on the outer side of the transparent elastic member.

15. The liquid crystal display device according to

claims 10

to

14

, wherein the transparent elastic member is made of silicone rubber.

16. The liquid crystal display device according to one of

claims 10

to

15

, wherein the thickness of the transparent elastic member is not less than 0.5 mm to less than 2 mm.

17. The liquid crystal display device according to one of

claims 10

to

16

, wherein the Young'"'"'s modulus of the transparent elastic member is not less than 1×

10⁴ N/m² to less than 1×

10⁸ N/m².

18. An electronic device having the liquid crystal display device according to one of

claims 10

to

17

.