Display devices containing a circular polarizing system and methods related thereto

• US 8,537,311 B2
• Filed: 11/03/2010
• Issued: 09/17/2013
• Est. Priority Date: 11/03/2010
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Fletcher, Bergen Albert, Purdy, Michael Lorne, Robinson, James Alexander, Ruiz Prieto, Glover
• Primary Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US12/938,687
• Publication Number:
  US 20120105774A1
• Time in Patent Office: 1,049 Days
• Field of Search: None
• US Class Current: 349/98
• CPC Class Codes: G02B 5/3016 involving passive liquid crystal elements optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528
• CPC Class Codes: G02F 2201/38 Anti-reflection arrangements
• CPC Class Codes: H04M 1/027 including magnifying means

Abstract

Various embodiments include devices and methods that allow a display device to, among other things, substantially match reflected color or luminance, or both, between a lens border and an active area of the display device. In one embodiment, a circular polarizer located external to a display area of the device is used. In one embodiment an additional quarter wave retarder located external to the display area is used.

Claims

1. An apparatus comprising:

a display device that includes a display and a quarter wave retarder, the display device having an active area located on the display;

a lens device that includes a lens border having a lens border color that substantially matches an active area color of the active area of the display device; and

a circular polarizer located proximate to the lens border, the circular polarizer being substantially aligned with the display and substantially covering the display, and the quarter wave retarder of the display device being located between the circular polarizer and the display.

2. The apparatus of claim 1 wherein the active area has an active area luminance and the lens border has a lens border luminance which substantially matches the active area luminance.

3. The apparatus of claim 2 wherein the lens device further comprises a lens which is substantially aligned with and located external to the display.

4. The apparatus of claim 3 wherein the lens border is located between the lens and the circular polarizer.

5. The apparatus of claim 4 wherein the circular polarizer is secured to an inner surface of the lens.

6. The apparatus of claim 4 wherein the circular polarizer is integral with the inner surface of the lens.

7. The apparatus of claim 3 wherein the lens border is located on an inner surface of the circular polarizer.

8. The apparatus of claim 3 wherein the display contains an integral linear polarizer.

9. The apparatus of claim 3 wherein the display has a display border which defines the active area.

10. The apparatus of claim 9 wherein the lens border and display border are substantially aligned and the circular polarizer is substantially aligned with and substantially covers the active area.

11. The apparatus of claim 10 wherein the lens border is a silk-screened border, an inked border or a painted border located on the lens or the circular polarizer.

12. The apparatus of claim 3 further comprising one or more elements located between the display and the lens.

13. The apparatus of claim 12 wherein at least one of the one or more elements is a touch panel.

14. The apparatus of claim 3 wherein the display is in an off state.

15. The apparatus of claim 12 wherein the circular polarizer is located between about 0.2 mm and about 1.5 mm from the outer surface of the lens.

16. The apparatus of claim 12 wherein the display is a liquid crystal display (LCD), a light emitting diode (LED), an organic LED (OLED), an active matrix OLED (AMOLED), cathode ray tube (CRT), electro luminescent display, vacuum fluorescent display or micro electro-mechanical (MEM) display.

17. The apparatus of claim 3 wherein the display device is a transmissive display device or an emissive display device.

18. The apparatus of claim 1 wherein the lens border is located between the circular polarizer and the display device.

19. The apparatus of claim 18 wherein the lens device further comprises a lens, the circular polarizer being located between the lens and the lens border.

20. The apparatus of claim 1 wherein the lens device further comprises a lens which is substantially aligned with the display and located external to the display, the circular polarizer being located between the lens and the display device.

21. The apparatus of claim 1 wherein the display contains an integral linear polarizer.

22. A method comprising:

allowing ambient light to enter an apparatus comprising a display device having an active area and a lens device, the active area being located on a display included in the display device, wherein the lens device has a lens border with a lens border color that substantially matches an active area color of the active area of the display device;

with a circular polarizer, circularly polarizing the ambient light in a first direction, the circular polarizer located proximate to the lens border;

circularly polarizing light leaving the display with a quarter wave retarder located between the circular polarizer and the display; and

preventing light from passing outwardly through the circular polarizer by circularly polarizing light reflecting from the lens device.

23. The method of claim 22 wherein the light is prevented from passing outwardly through the circular polarizer by polarizing the light in a second direction opposite to the first direction and the lens border has a lens border luminance which substantially matches the active area luminance in an off state.

24. The method of claim 23 wherein the lens device further comprises a lens which is substantially aligned with and located external to the display.

25. The method of claim 24 wherein the lens border is located on an inner surface of the circular polarizer.

26. The method of claim 24 wherein the circular polarizer is substantially aligned with and substantially covers the active area.

27. The method of claim 24 wherein the circular polarizer is substantially aligned with and substantially covers the display.

28. The method of claim 23 wherein the lens device emits linearly polarized light.

29. The method of claim 28 wherein the active area color and active area luminance substantially match the lens border color and lens border luminance to provide the lens border and active area with a substantially uniform appearance.

30. The method of claim 24 wherein one or more elements are located between the display and the lens, and light is prevented from passing outwardly through the circular polarizer by circularly polarizing light reflecting from the one or more elements.

31. The method of claim 30 wherein at least one of the one or more elements is a touch panel.

32. The method of claim 22 wherein the lens border is located between the lens and the circular polarizer.