Method and circuit for adjusting background contrast in a display device
AssigneeSamsung Electronics Co., Ltd.
InventorsJae-Sung Kang, Im-Soo Kang, Jae-Bong Choi, Ji-Hyun Lee
Life of this patent
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Abstract
A method for adjusting the contrast of a background region in a display device is provided. A video signal for a background region is received in a background region mode. The gain of the video signal is adjusted responsive to a background region control signal thereby adjusting the contrast of the background region. The result is a high quality display device.
Claims17
A method for adjusting a contrast of a background region in a display device, comprising:
- receiving a background region video signal defining a background region responsive to a background region enable signal;
- receiving a data signal distinct from the background region video signal defining a highlighting region responsive to a highlighting region enable signal where the background region is an outer region of the highlighting region;
- setting a gain of the background region video signal and independently of setting a gain of the data signal responsive to a gain control signal;
- and
- adjusting a contrast of the background region after setting the gain responsive to a contrast control signal.
A method for adjusting the contrast of a background region in a display device, comprising:
- receiving predetermined coordinates;
- setting a highlighting region corresponding to the predetermined coordinates;
- receiving a video signal for a background region responsive to a background enable signal, the background region being an outer region of the highlighting region;
- setting a gain of the video signal for the background region responsive to receiving the predetermined coordinates and to a contrast control signal;
- receiving a video signal for the highlighting region responsive to the highlighting enable signal;
- and
- setting a gain of the video signal for the highlighting region responsive to a highlight control signal and independently of setting the gain of the video signal for the background region.
A circuit for adjusting a contrast of a display device, comprising:
- a background region;
- a highlight region set by predetermined coordinates, the background region being an outer region of the highlight region;
- a highlighting region contrast control circuit that receives a video signal for the highlight region responsive to a highlight enable signal and controls a gain of the video signal for the highlight region responsive to a highlight region control signal;
- and
- a background region contrast control circuit that receives a video signal for the background region responsive to a background enable signal and controls a gain of the video signal for the background region independent of the gain of the video signal for the highlighting region responsive to a background region control signal.
A circuit for adjusting contrast, comprising:
- a generating circuit to generate a highlighting enable signal responsive to a data signal, the data signal being adapted to define a highlighting region in a display region;
- and
- an amplifier circuit to adjust a gain of a video signal displayed in the highlighting region independently of adjusting a gain of a signal displayed in the display region responsive to the highlighting enable signal and the data signal;
- where the generating circuit includes:
- a system clock generating circuit to generate a system clock and a vertical pulse responsive to synchronization signals of the video signal;
- a control register to latch the data signal responsive to the system clock and the vertical pulse;
- a controller to generate the highlighting enable signal responsive to the system clock and the vertical pulse.
Dependencies are inferred from the claim text.