Flat Panel Display Device with Improved External Light Visibility

• US 20120105956A1
• Filed: 03/23/2011
• Published: 05/03/2012
• Est. Priority Date: 10/27/2010
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jeong, Hwan-Hee, Park, Jung-Mok
• Application Number:
  US13/069,868
• Publication Number:
  US 20120105956A1
• Time in Patent Office: Days
• US Class Current: 359/488.01
• CPC Class Codes: G02B 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0444 using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A display device comprises: a display module for displaying images; a window integrated touch panel disposed on an upper portion of the display module and spaced apart from the display module; and a polarizing plate disposed under the window integrated touch panel. The polarizing plate is disposed under the window integrated touch panel so as to allow the polarizing plate to absorb light incident on a lower portion of the polarizing plate while preventing the window integrated touch panel from being scattered to the display module due to external impact, thereby making it possible to improve external light visibility.

Claims

1. A display device, comprising:

a display module for displaying images;

a window integrated touch panel disposed above an upper portion of the display module and spaced apart from the display module; and

a polarizing plate disposed on the window integrated touch panel.

2. The display device of claim 1, wherein the polarizing plate comprises a polarizing member and a phase delay film

3. The display device of claim 2, wherein the phase delay film is a λ

/4 phase delay film.

4. The display device of claim 2, further comprising a noise shield layer.

5. The display device of claim 4, wherein the noise shield layer is made of a transparent conductive material.

6. The display device of claim 4, wherein the noise shield layer and the display module are spaced apart from each other with a predetermined gap therebetween.

7. The display device of claim 4, further comprising an anti-reflective layer.

8. The display device of claim 4, wherein the phase delay film is disposed between the polarizing member and noise shield layer.

9. The display device of claim 8, wherein external light is reflected from the display module and is absorbed in the polarizing plate.

10. The display device of claim 4, further comprising an anti-reflective layer disposed under the noise shield layer.

11. The display device of claim 1, wherein the display module is any one selected from a liquid crystal display module, a plasma display module, an organic light emitting display module, a field effect display module, and an eletrophoretic display module.

12. The display device of claim 1, wherein external light is reflected from the display module and is absorbed in the polarizing plate.

13. The display device of claim 1, further comprising a noise shield layer disposed under the polarizing plate.

14. The display device of claim 13, wherein the noise shield layer is made of a transparent conductive material.

15. The display device of claim 13, wherein the noise shield layer and the display module are spaced apart from each other with a predetermined gap therebetween.

16. The display device of claim 13, further comprising an anti-reflective layer disposed under the noise shield layer.

17. The display device of claim 1, wherein the polarizing plate comprises a polarizing member which includes an upper support, a lower support, and a polarizing layer disposed between the upper support and the lower support.

18. The display device of claim 17, wherein the polarizing plate further comprises an adhesive layer disposed between the upper support and the window integrated touch panel.

19. The display device of claim 18, wherein the polarizing plate further comprises a phase delay film disposed under the lower support.

20. The display device of claim 1, wherein the polarizing plate comprises a polarizing member, an adhesive layer disposed between the polarizing member and the window integrated touch panel, and a phase delay film disposed under the polarizing member.