LED display device and driving method thereof

A technology of a display device and a driving method, which is applied to static indicators, instruments, etc., can solve problems such as difficulty in adjusting the ideal state, heavy workload, etc., and achieve the effect of improving the effect of gamma correction and the best display effect

Active Publication Date: 2017-02-01
CHIPONE TECH BEIJINGCO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the frame rate or refresh rate of the LED display screen changes, the gamma curve needs t

Method used

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  • LED display device and driving method thereof
  • LED display device and driving method thereof
  • LED display device and driving method thereof

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Embodiment Construction

[0029] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

[0030] In the following, many specific details of the present invention are described, such as device structures, materials, dimensions, processing techniques and techniques, for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0031] In this application, the term "frame" refers to a frame in a video image that can be displayed independently.

[0032] figure 1 A schematic structural diagram of an LED display device according to an embodiment of the present invention is shown. The LED display devi...

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Abstract

The application discloses an LED display device and a driving method thereof. The LED display device comprises a plurality of LEDs serving as pixel units. The method includes: gray scale data are generated according to a display image; according to a practical frame rate and a practical refreshing rate, a practical gamma table is generated; on the basis of the practical refreshing rate, gamma correction is carried out on the gray scale data to obtain display data; a PWM signal is generated based on the display data; and a constant-current source is controlled to provide a driving current by using a PWM signal, so that LEDs are lightened to generate brightens corresponding to a gray scale. According to the method, the practical gamma curve is generated based on the practical frame rate and the practical refreshing rate, thereby improving an effect of gamma correction.

Description

technical field [0001] The invention belongs to the field of display technology, and more specifically relates to an LED display device and a driving method thereof. Background technique [0002] Light-emitting diodes (light-emitting diodes, LEDs) are diodes that use the principle of recombination lighting of minority carriers and majority carriers in a PN junction. A forward voltage is applied between the PN junctions so that the diodes are turned on, and electrical energy can be converted into light energy. The LED display device is a display device using LEDs as pixel units, wherein the brightness of the LEDs corresponds to the gray scale to be displayed. [0003] LED display devices are different from liquid crystal display devices. In the liquid crystal display device, the deflection of the liquid crystal molecules changes the light transmittance of the pixel unit, so that the intensity of the light generated by the backlight source after passing through the liquid cr...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/32
CPCG09G3/2018G09G3/32G09G2320/0276
Inventor 唐永生王勇张哲高兴波
Owner CHIPONE TECH BEIJINGCO LTD
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