Edge-Disposed Backlight Drive Boards for Display Uniformity
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Solution Overview
Problem
Existing backlight drive systems face challenges in efficiently controlling and adjusting the brightness of backlight units due to long cables causing electromagnetic interference and reduced stability, with a need for improved heat dissipation and display uniformity.
Innovation Solution
A backlight drive system comprising a control board connected to multiple backlight drive boards at the edge of the display screen, with power supply boards and a transfer power board to reduce cable lengths, enhance signal transmission stability, and improve heat dissipation through strategic placement and design of heating components and heat dissipating layers on the backlight drive boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single backlight drive board is disposed in the central position of the display screen, then the structure is simple, but the cable length becomes long causing electromagnetic interference and reduced stability
Solution Approach 1:
The patent divides the single backlight drive board into multiple backlight drive boards, with each board disposed at different edge positions of the display screen. This segmentation reduces the cable length between each drive board and its corresponding backlight unit, thereby reducing electromagnetic interference and improving signal transmission stability.
2Reliability
If multiple backlight drive boards are disposed at the edge of the display screen, then cable length is reduced and electromagnetic interference is minimized, but the device complexity increases
Solution Approach 1:
The system segments the backlight drive function into multiple independent boards disposed at different edge positions. Each board handles a specific region, which simplifies the overall signal transmission path and reduces electromagnetic interference despite increasing the number of components.
Solution Approach 2:
The patent introduces a control board as an intermediary that coordinates multiple backlight drive boards. This control board manages the complexity by providing unified control signals to all edge-disposed drive boards, thereby maintaining system manageability while benefiting from the distributed architecture.
3Temperature
If backlight drive boards are disposed at the edge of the display screen, then heat dissipation is improved, but the control and coordination complexity increases
Solution Approach 1:
By disposing backlight drive boards at different edge positions, the patent segments the heat generation and dissipation process. Each board handles a specific region's backlight units, allowing localized heat dissipation that is more efficient than centralized heat management.
Solution Approach 2:
The control board serves as an intermediary that simplifies the control coordination among multiple edge-disposed backlight drive boards. It provides unified control signals and manages the complexity of coordinating multiple distributed boards, making the system manageable despite the increased number of components.
Data Source
AI summary
A backlight drive system, a display device and a backlight drive board, relates to the field of display technology. The backlight drive system is used for the display device, the display device comprises a display screen (20) and a plurality of backlight units, the backlight drive system comprises: a control board (10) and a plurality of backlight drive boards (11) electrically connected to the control board (10), the plurality of backlight drive boards (11) are disposed at the edge of display screen (20), the plurality of backlight drive boards (11) electrically connected to the plurality of backlight units by a backlight drive cable (111); the control board (10) is configured to output enabling control signal and brightness adjustment signal to the plurality of backlight drive board (11), to control the plurality of backlight drive boards (11) to drive the plurality of backlight units, to achieve enabling control and brightness adjustment.