LIGHT GENERATING DEVICE AND DISPLAY APPARATUS HAVING THE SAME

• US 20160180778A1
• Filed: 08/13/2015
• Published: 06/23/2016
• Est. Priority Date: 12/22/2014
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHANG, Moon-hwan, NAM, Seokhyun
• Application Number:
  US14/825,562
• Publication Number:
  US 20160180778A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 45/22 using optical feedback

Abstract

A display apparatus includes a light source driving part generating a driving voltage in response to a control signal, a light source part generating a light in response to the driving voltage, a display panel receiving the light to display an image, a measuring part receiving the light from the light source part to measure a spectral power distribution of the light, an extracting part measuring optical data by elements of the light source part on the basis of the spectral power distribution and extracting optical characteristics by the elements on the basis of the optical data, and a light source controlling part controlling the control signal on the basis of the optical characteristics.

Claims

1. A light generating device comprising:

a light source driving part generating a driving voltage in response to a control signal;

a light source part generating a light in response to the driving voltage;

a measuring part receiving the light generated by the light source part to measure a spectral power distribution of the light;

an extracting part measuring optical data provided by elements of the light source part on the basis of the spectral power distribution and extracting optical characteristics provided by the elements on the basis of the optical data; and

a light source controlling part controlling the control signal on the basis of the optical characteristics.

2. The light generating device of claim 1, wherein the measuring part comprises a spectrophotometer disposed in the light source part to measure the spectral power distribution of the light.

3. The light generating device of claim 1, wherein the light source part comprises a plurality of light emitting diode units each comprising light emitting diode chips respectively displaying first, second, and third colors.

4. The light generating device of claim 3, wherein at least one of the first, second, and third colors comprises one of red, green, and blue color.

5. The light generating device of claim 1, wherein the light source part comprises a plurality of light emitting diode units each comprising a light emitting diode chip displaying a first color and a fluorescent layer displaying a fourth color different from the first color.

6. The light generating device of claim 1, wherein the spectral power distribution comprises at least two spectral power distributions and the optical characteristics by the elements of the light source part are extracted on the basis of the optical data caused by each of the spectral power distributions.

7. The light generating device of claim 6, wherein the optical data comprises one of;

an area of a peak area,

a peak wavelength,

an intensity of the peak wavelength,

a standard deviation,

a kurtosis,

a skew, and

a full-width at half-maximum with respect to each of the spectral power distributions.

8. A display apparatus comprising:

a light source driving part generating a driving voltage in response to a control signal;

a light source part generating a light in response to the driving voltage;

a display panel receiving the light to display an image;

a measuring part receiving the light from the light source part to measure a spectral power distribution of the light;

an extracting part measuring optical data by elements of the light source part on the basis of the spectral power distribution and extracting optical characteristics by the elements on the basis of the optical data; and

a light source controlling part controlling the control signal on the basis of the optical characteristics.

9. The display apparatus of claim 8, wherein the measuring part comprises a spectrophotometer disposed in the light source part to measure the spectral power distribution of the light.

10. The display apparatus of claim 8, wherein the light source part comprises a plurality of light emitting diode units each comprising light emitting diode chips respectively displaying first, second, and third colors.

11. The display apparatus of claim 10, wherein at least one of the first, second, and third colors comprises one of red, green, and blue color.

12. The display apparatus of claim 8, wherein the light source part comprises a plurality of light emitting diode units each comprising a light emitting diode chip displaying a first color and a fluorescent layer displaying a fourth color different from the first color.

13. The display apparatus of claim 8, further comprising a panel driving part to drive the display panel, wherein the panel driving part comprises:

an image controller generating an image signal, a gate control signal, and a data control signal;

a gate driver applying a gate signal to the display panel in response to the gate control signal; and

a data driver applying a data signal to the display panel in response to the data control signal.

14. The display apparatus of claim 13, wherein the light source part comprises a plurality of light emitting blocks each comprising one or more light emitting diode units.

15. The display apparatus of claim 14, wherein the measuring part comprises a plurality of spectrophotometers respectively corresponding to the light emitting blocks.

16. The display apparatus of claim 8, wherein the spectral power distribution comprises at least two spectral power distributions and the optical characteristics by the elements of the light source part are extracted on the basis of the optical data caused by each of the spectral power distributions.

17. The display apparatus of claim 16, wherein the optical data comprises one of

an area of a peak area,

a peak wavelength,

an intensity of the peak wavelength,

a standard deviation,

a kurtosis,

a skew, and

a full-width at half-maximum with respect to each of the spectral power distributions.

18. A light generating device comprising:

a light source driving part receiving a control signal and generating a driving voltage in response to the control signal;

a light source part generating a light in response to the driving voltage;

a measuring part receiving the light generated by the light source part and measuring a spectral power distribution of the light;

an extracting part measuring optical data outputted by elements of the light source part on the basis of the spectral power distribution and extracting optical characteristics including color coordinate and correlated color temperature provided by the elements on the basis of the measured optical data; and

a light source controlling part controlling the control signal on the basis of the extracted optical characteristics,

the measuring part comprises an array of spectrophotometers disposed in the light source part to measure the spectral power distribution of the light.

19. The light generating device of claim 18, wherein the light source part generates a white light by mixing a yellow and a blue light.