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LED display drive control method and device, and LED lamp panel

A technology of LED light panels and LED lights, which can be applied to static indicators, instruments, etc., can solve problems such as the first scan being too dark, and achieve the effect of reducing afterglow

Active Publication Date: 2015-12-23
XIAN NOVASTAR TECH
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Problems solved by technology

[0007] From the above analysis, it can be seen that in the LED screen using a general-purpose on-off driver chip or a PWM driver chip, the existing scanning method with a fixed sequence will lead to low gray due to the influence of the column line parasitic capacitance. The problem with the first sweep of the dark

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  • LED display drive control method and device, and LED lamp panel
  • LED display drive control method and device, and LED lamp panel
  • LED display drive control method and device, and LED lamp panel

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] See image 3 , a LED display driving control method proposed by the embodiment of the present invention can be applied to figure 2 The LED light board shown.

[0028] Such as figure 2 As shown, the LED light board includes: a plurality of scanning lines A~H, a plurality of data lines, a plurality of LED lamps electrically connected to the plurality of scanning lines A~H and the plurality of data lines, a row decoding circuit and A column drive chip; wherein, the plurality of scan lines A to H are electrically connected to a row decoding circuit through a row selection switch such as a PMOS transistor, and the plurality of data lines are respectively electrically connected to each output terminal OUT1 of the column drive chip...

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Abstract

The invention relates to an LED display drive control method used for driving and controlling a plurality of LED lamps electrically connected with M scan lines, wherein the M is a positive integer bigger than 1; the LED display drive control method comprises the following steps: carrying out N-round scanning in sequence, and M scans are done in each round of scanning, wherein the N is a positive integer bigger than 1. In addition, the scan lines corresponding to the first scan of M scans in each round scanning of the N-round scanning are different from each other. The invention also provides an LED lamp panel using the method, and an LED display drive control device realizing the method. The position of the first scan of at least partial rounds of scanning in the multi-round scanning in the prior art can be changed, i.e., a random scanning order is employed in each round of scanning, so each scan line could be the first scan, thus solving the dark problems of the low grey scale first scan of the LED display, and the random scanning order can mitigate afterglow and caterpillar problems.

Description

technical field [0001] The invention belongs to the technical field of LED display control, and in particular relates to an LED display drive control method, an LED lamp panel and an LED display drive control device. Background technique [0002] Since 2012, the pitch of LED display screens has broken through below P3, but in the process of use, the dimming of the first scan has always been a bottleneck for high-density small-pitch LED displays. [0003] At present, when the LED scanning display control system drives the LED screen with a general-purpose on-off driver chip, the gray scale is realized through subfields. Turn on the time to realize the weight corresponding to the bit. Usually, in order to improve the refresh rate of the scanning display screen, it is not to achieve the gray level of a certain line before realizing the gray level of the next line, but to divide the total number of sub-fields required to achieve the full gray level into multiple parts, for exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 梁伟刘德福王伙荣
Owner XIAN NOVASTAR TECH
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