Pixel and display device
AssigneeSapien Semiconductors Inc.
InventorsJun Young Jung, Myunghee Lee
Life of this patent
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Abstract
The present embodiments disclose a display device. A display device according to an embodiment of the present disclosure may comprise a pixel including a plurality of sub-pixels having luminous elements respectively, wherein each of the plurality of sub-pixels may be arranged in parallel with each other; and a pixel circuit connected to the luminous elements for driving the luminous elements; wherein the luminous elements may emit light of one color among red, green, and blue, and wherein a number of luminous elements emitting red light may be greater than a number of luminous elements emitting green or blue light.
Claims6
A pixel circuit for driving a plurality of luminous elements with pulse width modulation (PWM) signals, the pixel circuit comprising:
- a pixel memory configured to store image data of red, green, and blue;
- and
- three sub-pixel drivers connected to luminous elements respectively, wherein the three sub-pixel drivers include first, second and third sub-pixel drivers, each sub-pixel driver including:
- a PWM generation circuit configured to generate PWM signals based on bit values of the image data and a clock signal such that each of a plurality of a subframes included in the frame have a PWM signal according to each bit value, and
- a control circuit configured to control a light-emission and non-emission of a respective luminous element in response to the PWM signals applied to each subframe,
- wherein
- the first sub-pixel driver is connected to and configured to drive two red luminous elements based on the image data of red stored in the pixel memory,
- the second sub-pixel driver is connected to and configured to drive a green luminous element based on the image data of green stored in the pixel memory, and
- the third sub-pixel driver is connected to and configured to drive a blue luminous element based on the image data of blue stored in the pixel memory.
A display device comprising:
- a pixel including
- at least two first sub-pixels each having a red light emitting diode (LED) emitting red light,
- a second sub-pixel having a green LED emitting green light, and
- a third sub-pixel having a blue LED emitting blue light, wherein each sub-pixel is arranged in parallel with each other;
- and
- a pixel circuit including three sub-pixel drivers configured to drive two red LEDs, the green LED, and the blue LED, each sub-pixel driver including:
- a PWM generation circuit configured to generate a PWM signal based on bit values of image data and a clock signal such that each of a plurality of subframes included in a frame is controlled according to each bit value, and
- a control circuit configured to control a light-emission and non-emission of a respective LED in response to the PWM signal applied to each of a plurality of subframes,
- wherein the pixel circuit includes:
- a memory unit having a first memory configured to store first image data of red, a second memory configured to store second image data of green, and a third memory configured to store third image data of blue;
- a first sub-pixel driver configured to drive two red LEDs according to a first sub-pixel driver control signal;
- a second sub-pixel driver configured to drive the green LED according to a second sub-pixel driver control signal;
- and
- a third sub-pixel driver configured to drive the blue LED according to a third sub-pixel driver control signal.
Dependencies are inferred from the claim text.