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LED display device and its driving method and chip

A technology of a display device and a driving method, which is applied to static indicators, cathode ray tube indicators, instruments, etc., and can solve the problem of reduced opening speed, deterioration of gray-scale linearity and consistency, and affecting the display effect of low-gray-scale images and other problems, to achieve the effect of increasing speed, compensating consistency, and improving low gray scale linearity

Active Publication Date: 2021-11-02
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, as the pixel pitch of the LED display screen decreases and the integration level increases, when displaying low-gray-scale images, the channel opening speed driven by PWM constant current will decrease, resulting in gray-scale distortion when displaying low-gray-scale images. Poor linearity and consistency, affecting the display effect of low-grayscale images

Method used

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  • LED display device and its driving method and chip
  • LED display device and its driving method and chip
  • LED display device and its driving method and chip

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Embodiment Construction

[0026] 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.

[0027] 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.

[0028] figure 1 A schematic structural diagram of an LED display device according to an embodiment of the present invention is shown. The LED display device 100 includes a row driving module 110 , a column driving module 120 , a channel control module 130 and a display arra...

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Abstract

The application discloses an LED display device, a driving method thereof and a chip. The LED display device includes: a display array, including a plurality of row lines, a plurality of column lines and a plurality of pixel units, each pixel unit in the plurality of pixel units includes a pixel connected to one of the plurality of row lines and one of the plurality of column lines LED; a row driving module, connected to a plurality of row lines, for providing a selection signal; a column driving module, connected to a plurality of column lines, for providing a driving signal corresponding to the grayscale data according to a pulse width modulation signal; And a channel control module, which is connected to multiple column lines, and is used to adjust the column line voltage of the corresponding column line to the target voltage during the first period of time when the pulse width modulation signal is valid, so as to improve the constant current when displaying low grayscale images The opening speed improves the linearity and consistency of low grayscale when displaying low grayscale.

Description

technical field [0001] The invention belongs to the field of display technology, and more specifically relates to an LED display device, a driving method and a chip thereof. Background technique [0002] Light-emitting diodes (light-emitting diodes, LEDs) are diodes that use the principle of recombination of minority carriers and majority carriers in a PN junction to emit light. 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 rotation 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 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/3275
CPCG09G3/32G09G3/3275G09G5/10G09G2310/0291G09G2320/064G09G3/3216G09G2310/08H05B45/325G09G2230/00G09G2310/06G09G2330/021G09G2320/0271
Inventor 黄志正
Owner CHIPONE TECH BEIJINGCO LTD