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Brightness compensation method and correction system of direct type mini-LED backlight module and display device

A mini-led and brightness compensation technology, applied to static indicators, instruments, etc., can solve the problems of large-size Mini-LED backlight popularization and application obstacles, backlight brightness consistency is difficult to control, and is difficult to achieve, so as to achieve consistent optical brightness High reliability, accurate and reliable results, and reduced design and processing difficulty

Active Publication Date: 2021-07-23
HUAYUAN SEMICON SHENZHEN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if figure 1 As shown, some blocks have higher brightness, as shown in P2 in the figure; some blocks have lower brightness, as shown in P1 and P3 in the figure, causing the backlight to appear to have spots one by one
Therefore, the larger the size of the Mini-LED backlight, the more partitions will be required, and the correspondingly, the more difficult it is to control the brightness consistency of the backlight. In addition to achieving), the production process needs to be sufficiently stable (difficult to achieve in engineering), which has caused great obstacles to the popularization and application of large-size Mini-LED backlights in terms of technology and cost.

Method used

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  • Brightness compensation method and correction system of direct type mini-LED backlight module and display device
  • Brightness compensation method and correction system of direct type mini-LED backlight module and display device
  • Brightness compensation method and correction system of direct type mini-LED backlight module and display device

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Effect test

Embodiment 1

[0045] Such as image 3 As shown, the brightness compensation method of the direct-lit mini-LED backlight module in this embodiment includes the following steps:

[0046] The zoning step is zoning the direct-lit mini-LED backlight module.

[0047] The upper and lower limit brightness setting step is to set the brightness upper limit and brightness lower limit without compensation. The upper limit of brightness and / or the lower limit of brightness are configurable, wherein the upper limit of brightness can be configured as the maximum value of brightness, or any value below the maximum value that is greater than the lower limit of brightness; the lower limit of brightness can be configured as the minimum value of brightness value, or any value above the min value and less than the brightness cap. Apparently, the configured brightness value of the upper brightness limit should be greater than the configured brightness value of the lower brightness limit. When the upper limit ...

Embodiment 2

[0064] Such as Figure 7 Shown is a schematic diagram of a brightness correction system 100 of a mini-LED backlight display device according to an embodiment, including:

[0065] Initialize brightness and compensation data generation device 200 (such as PC, mobile phone, tablet computer, etc.), for human-computer interaction, to facilitate users to set system-related parameters (setting reference brightness information, etc.), and control the backlight brightness generation device to perform desired brightness output To the backlight system, control the brightness detector control system 700 to measure the brightness through the brightness detector 600, then compare the brightness information through the backlight brightness information comparison module in the initialization brightness and compensation data generating device 200, and calculate the brightness compensation data . Finally, the brightness compensation data is written into the non-volatile memory 402 .

[0066] ...

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Abstract

The invention discloses a brightness compensation method and correction system of a direct type mini-LED backlight module and a display device, and the brightness compensation method of the direct type mini-LED backlight module comprises the following steps: a partitioning step: partitioning the direct type mini-LED backlight module; an upper and lower limit brightness setting step: setting a brightness upper limit and a brightness lower limit which are not compensated; a judgment step: judging whether the brightness of each partition falls into the brightness upper limit and the brightness lower limit; a brightness compensation step, wherein the brightness compensation step comprises a brightness compensation data acquisition step and a brightness compensation data superposition step. By adopting the brightness compensation method provided by the invention, the optical brightness consistency of large-size backlight can be simply and effectively improved, and the design and processing difficulty of large-size backlight display equipment is reduced, so that the requirements on the aspects of a driving chip, production and manufacturing precision and the like are effectively reduced, and the cost is saved.

Description

technical field [0001] The present invention relates to the technical field of backlight modules, in particular to a mini-LED-based direct-lit backlight module and a brightness compensation method and correction system for a display device. Background technique [0002] In current LCD (Liquid crystal displays, liquid crystal display) display devices, since the LCD panel itself does not emit light, a backlight module needs to be equipped to provide the light source required by the display panel. The function of the backlight module is to provide sufficient brightness and evenly distributed light source so that the LCD can display images normally. The luminous effect of the backlight module will directly affect the visual effect and optical quality of the liquid crystal display module. [0003] The mini-LED (mini Light Emitting Diode, miniature light-emitting diode) backlight technology is to manufacture mini-LED light-emitting chips and driver chips on the backlight substrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/342G09G2320/0233
Inventor 刘克远罗来江张程龙
Owner HUAYUAN SEMICON SHENZHEN LTD
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