Display Device

• US 20080258995A1
• Filed: 09/13/2006
• Published: 10/23/2008
• Est. Priority Date: 09/21/2005
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Vissenberg, Michel Cornelis Josephus Marie, Ijzerman, Willem Lubertus, Binasch, Gabriela
• Granted Patent: US 9,411,181 B2
• Time in Patent Office: Days
• US Class Current: 345/1.1
• CPC Class Codes: B60K 2360/1526 Dual-view displays
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/22 Display screens
• CPC Class Codes: B60K 35/654 the user being the driver
• CPC Class Codes: B60K 35/656 the user being a passenger
• CPC Class Codes: B60R 2011/0005 Dashboard
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02F 1/1323 Arrangements for providing a switchable viewing angle
• CPC Class Codes: G02F 1/133391 Constructional arrangement for sub-divided displays
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

The present invention relates to a dual view display device where a display surface is divided into a first and a second sub-section (10a, 10b). A backlighting arrangement is used which provides light with different angular distributions (16a, 16b; 16a′, 16b′) to the different sub-sections. This allows at low cost e.g. in a vehicle the displaying of movies or computer game windows at a part of a display, which part is not visible for the driver of the vehicle.

Claims

1. A display device for displaying different content in different viewing angles, comprising:

an LCD panel and a backlighting arrangement, wherein a first subsection of the LCD panel is arranged to display a first image and a second subsection of the LCD panel is arranged to display a second image, and the backlighting arrangement, at said first subsection, is arranged to emit light with a first angular distribution and at the second subsection is arranged to emit light with a second angular distribution which is different from the first angular distribution.

2. A display device according to claim 1, wherein the backlighting arrangement further comprises a lightguide, arranged to selectively emit light with the first or second angular distribution, a first controllable shutter, covering the first LCD panel sub-section and a second controllable shutter, covering the second LCD panel sub-section, and is arranged to emit, in a first mode, light with the first angular distribution while making the first shutter transmissive and the second shutter blocking, and, in a second mode, light with the second angular distribution while making the first shutter blocking and the second shutter transmissive.

3. A display device according to claim 2, wherein the light with the first angular distribution is emitted by activating a first lamp and light with the second angular distribution is emitted by activating a second lamp.

4. A display device according to claim 2, wherein the backlighting arrangement is arranged to emit, in a third mode, light with both angular distributions simultaneously, while making both shutters transmissive.

5. A display device according to claim 2, wherein the backlighting arrangement is arranged to selectively emit light with a third angular distribution.

6. A display device according to claim 1, wherein the backlighting arrangement comprises a lightguide arranged to emit light with the second angular distribution and comprises a first diffuser covering the first LCD panel sub-section and changing the angular distribution at that sub-section into the first angular distribution.

7. A display device according to claim 6, wherein the first diffuser is controllable.

8. A display device according to claim 7, wherein the backlighting arrangement comprises a second controllable diffuser, covering the second LCD panel sub-section.

9. A display device according to claim 1, wherein the LCD panel has the format 16:

9 and the second sub-section has the format 4;

3, such that the division between the first and second sub-sections is accomplished by a vertical border.

10. A display device according to claim 1, wherein the LCD panel has the format 4:

3 and the second sub-section has the format 16;

9, such that the division between the first and second sub-sections is accomplished by a horizontal border.

11. A display device according to claim 1, wherein the display device is mounted in a vehicle, the first image is intended for the vehicle driver, and the second image is intended for a vehicle passenger.