Light generating device, display apparatus having the same and method of driving the same
AssigneeSamsung Electronics Co., Ltd.
InventorsMun-Soo Park, Jong-Hyon Park, Myeong-Su Kim
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Abstract
A light generating device includes a brightness detector. The brightness detector extracts a brightness data from an image data. The light generating device compensates the uniformity of a white light whenever the image data that is greater than a reference gray scale is input through the brightness detector. Thus, the light generating device may compensate the uniformity of the white light in real time, so that a display apparatus employing the light generating device may improve a high-quality image.
Claims20
A light generating device comprising:
- a brightness detector receiving a plurality of image data from an exterior source, detecting a plurality of brightness data corresponding to the image data, comparing a plurality of gray scales corresponding to the image data with a reference gray scale, and outputting an enable signal based on the compared result;
- a dimming signal controller receiving a compensation signal and the brightness data and outputting a first dimming signal corresponding to the brightness data and a second dimming signal obtained by compensating the first dimming signal based on the compensation signal;
- a light source driver outputting a driving signal in response to either the first dimming signal or the second dimming signal from the dimming signal controller;
- a light source section comprising a plurality of light sources that generates a white light in response to the driving signal;
- and
- a light source compensator starting its operation in response to the enable signal, receiving the white light from the light source section, and outputting the compensation signal to compensate a light characteristic of the white light.
A display apparatus comprising:
- a display unit displaying an image corresponding to an image signal from an exterior source using a white light;
- and
- a light generating device provided under the display unit to generate the white light,
- the light generating device comprising:
- a brightness detector receiving a plurality of image data from an exterior source, detecting a plurality of brightness data corresponding to the image data, comparing a plurality of gray scales corresponding to the image data with a reference gray scale, and outputting an enable signal based on the compared result;
- a dimming signal controller receiving a compensation signal and the brightness data and outputting a first dimming signal corresponding to the brightness data and a second dimming signal obtained by compensating the first dimming signal based on the compensation signal;
- a light source driver outputting a driving signal in response to either the first dimming signal or the second dimming signal from the dimming signal controller;
- a light source section comprising a plurality of light sources that generates a white light in response to the driving signal;
- and
- a light source compensator starting its operation in response to the enable signal, receiving the white light from the light source section, and outputting the compensation signal to compensate a light characteristic of the white light.
A method of driving a light generating device having a plurality of light source units that generates a white light in response to a driving signal, the method comprising:
- receiving an image data from an exterior source;
- extracting a brightness data from the image data and comparing a gray scale of the image data with a reference gray scale;
- outputting either a first dimming signal corresponding to the brightness data or a second dimming signal obtained by compensating the first dimming signal based on the compared result;
- generating the driving signal corresponding to the first or second dimming signal;
- and
- emitting the white light from the light source units in response to the driving signal.
Dependencies are inferred from the claim text.