Local Dimming Backlight Substrate Layout With Integrated Driver Chips
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Solution Overview
Problem
Existing display devices face challenges in improving image quality, managing LED driver boards, minimizing cable connections between main boards and LED substrates, and optimizing the arrangement and shape of LED substrates and driver ICs.
Innovation Solution
A display device structure featuring a display panel, frame, multiple substrates with mounted light sources and driver chips, an extension board connected to these substrates, and cables connecting the main board to the extension board, allowing for improved image quality through local dimming blocks and reduced cable complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple substrates with driver ICs are used for local dimming control, then image quality is improved, but device complexity increases
Solution Approach 1:
The backlight unit is divided into multiple substrates, each controlling a specific local dimming block. Each substrate has driver ICs mounted directly on it, enabling independent control of light sources in different regions. This segmentation allows precise local dimming control to improve image quality while distributing the control functionality across multiple independent units.
Solution Approach 2:
Driver ICs are mounted directly on the substrates themselves, with the driver ICs being nested on the substrate surface. This integration eliminates the need for separate LED driver boards and reduces the number of cable connections, thereby improving image quality through better control while reducing device complexity.
2Device complexity
If driver ICs are mounted on substrates instead of using a separate LED driver board, then device complexity is reduced, but manufacturing precision may worsen
Solution Approach 1:
The driver ICs and substrates are merged into a single integrated unit. Instead of having a separate LED driver board connected via cables, the driver ICs are mounted directly on the substrates that carry the light sources. This merging eliminates intermediate connection components and simplifies the overall device structure while maintaining precise control capability.
Solution Approach 2:
The substrates serve multiple functions: they carry the light sources and simultaneously host the driver ICs for controlling those light sources. This multi-functionality eliminates the need for dedicated LED driver boards and reduces cable connections, simplifying the device while maintaining control precision through direct integration.
3Device complexity
If the number of cables connecting main board to LED substrates is reduced, then device complexity is reduced, but reliability may worsen
Solution Approach 1:
The LED driver board and its associated cable connections are extracted from the system. By mounting driver ICs directly on the substrates, the patent removes the intermediate LED driver board and multiple cables, simplifying the device structure. The control signals are now transmitted through integrated pathways on the substrates themselves, reducing connection points and potential failure sources.
Data Source
AI summary
A display device is provided. The display device according to the present disclosure may include: a display panel; a frame positioned behind the display panel; a main board coupled to the frame; a plurality of substrates disposed between the display panel and the frame, the plurality of substrates coupled to the frame; a plurality of light sources mounted on each of the plurality of substrates; a driver chip mounted on each of the plurality of substrates; an extension board electrically connected to the plurality of substrates; and a cable electrically connecting the main board to the extension board.