Display apparatus having right-hand and left-hand illumination units

• US 7,972,050 B2
• Filed: 12/10/2004
• Issued: 07/05/2011
• Est. Priority Date: 01/07/2004
• Status: Expired due to Fees

• Current Assignee: TP Vision Holding BV (TPV Technology Co., Ltd. (f/k/a Nanjing Huadong Electronics Information & Technology))
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Verhagen, Johannes Petrus Cornelis Maria, Overes, Theodorus Franciscus Emilius Maria
• Primary Examiner(s): Sember; Thomas M
• Application Number:
  US10/596,759
• Publication Number:
  US 20090016076A1
• Time in Patent Office: 2,398 Days
• Field of Search: 362/231, 362/555, 362/551, 362/316, 362606-608, 362 26- 27, 362/612, 362/616, 362559-561, 362331-332, 362/515, 362/516, 362/285, 362/287, 362/418, 362/427, 362/14, 345/102, 385/901
• US Class Current: 362/555
• CPC Class Codes: H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control camera processing pipelines for colour balance H04N23/88

Abstract

The invention relates to a display apparatus with a display unit, having means for background lighting at the back of the display apparatus. According to the invention, the means for background lighting comprise two illumination units being provided at the right-hand and left-hand of the display apparatus, said illumination units being formed as substantially vertically positioned, longitudinal light guides comprising means for coupling out light, each of the light guides being provided on at least one of its ends with a light source. The light sources preferably comprise coloured LEDs.

Claims

1. A display apparatus with a display unit, having means for background lighting at a side or the back of the display apparatus to produce a back light pattern;

characterized in that the means for background lighting comprise two illumination units being provided at the right-hand and left-hand of the display apparatus, said illumination units being formed as substantially vertically positioned, longitudinal light guides comprising means for coupling out light, each of the light guides being provided on at least one of its ends with a light source;

further characterized in that the light guides are rotatable along a longitudinal axis to thereby allow adjustment of the back light pattern, wherein said rotation of each light guide is performed independently of any movement of the light guide'"'"'s corresponding light source.

2. A display apparatus according to claim 1, characterized in that the means for coupling out light are formed as a structure provided on the surface of the light guide.

3. A display apparatus according to claim 1, characterized in that the display apparatus comprises means for controlling the colour of the backlight and that the light guides are provided on both ends with a light source, said light source comprising a red, a green and a blue LED.

4. A display apparatus according to claim 3, characterized in that the display apparatus comprises a control circuit for controlling the colour of each of the light sources in dependence of a colour of a part of the display screen which is close to the light source.

5. A display apparatus with a display unit, having means for background lighting at a side or the back of the display apparatus;

characterized in that the means for background lighting comprise two illumination units being provided at the right-hand and left-hand of the display apparatus, said illumination units being formed as substantially vertically positioned, longitudinal light guides comprising means for coupling out light, each of the light guides being provided on at least one of its ends with a light source;

further characterized in that the light guides are rotatable along a longitudinal axis to thereby allow adjustment of the back light pattern, wherein said rotation of each light guide is performed independently of any movement of the light guide'"'"'s corresponding light source;

further characterized in that the means for background lighting produces a back light pattern on a wall.

6. A display apparatus according to claim 5, characterized in that the means for coupling out light are formed as a structure provided on the surface of the light guide.

7. A display apparatus according to claim 5, characterized in that the display apparatus comprises means for controlling the colour of the backlight and that the light guides are provided on both ends with a light source, said light source comprising a red, a green and a blue LED.

8. A display apparatus according to claim 7, characterized in that the display apparatus comprises a control circuit for controlling the colour of each of the light sources in dependence of a colour of a part of the display screen which is close to the light source.

9. A display apparatus with a display unit, having means for background lighting at a side or the back of the display apparatus to produce a back light pattern;

characterized in that the means for background lighting comprise two illumination units being provided at the right-hand and left-hand of the display apparatus, said illumination units being formed as substantially vertically positioned, longitudinal light guides comprising means for coupling out light, each of the light guides being provided on both ends with a light source;

wherein the display apparatus further comprises means for controlling the color of the background lighting, and a control circuit for controlling the color of each of the light sources in dependence upon a color of a part of the display unit which is close to the light source, characterized in that the display apparatus further comprises user controlled means for adjusting the wavelength and brightness of the color of the background lighting.

10. A display apparatus according to claim 9 wherein the means for coupling out light are formed as a structure provided on the surface of the light guide.

11. A display apparatus according to claim 9 wherein the light guides are rotatable along a longitudinal axis.