Integrated Source Driver Circuit Reducing PCB Area
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Solution Overview
Problem
Existing source driving systems for display devices require a large circuit board area due to the distribution of power driving units, memory, data processors, backlight driving units, and gamma voltage sources, which limits space efficiency and increases complexity.
Innovation Solution
The implementation of a source driving system with multiple integrated circuits, where a master source driving integrated circuit and a slave source driving integrated circuit communicate and synchronize to generate and adjust driving voltages, reducing the need for extensive circuit board components by sharing power drivers and data processing tasks, and utilizing a gamma voltage source to generate display voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple source drivers and power driving units are distributed on the circuit board, then each pixel block can be driven independently, but the circuit board area increases significantly
Solution Approach 1:
The patent combines multiple source drivers into a single integrated source driver circuit that can sequentially drive different pixel blocks. The power driving unit is also integrated into this same circuit, merging functions that were previously distributed across separate components. This consolidation maintains the ability to independently drive each pixel block while significantly reducing the overall circuit board area required.
Solution Approach 2:
The integrated source driver circuit is designed with multi-functionality, serving as both the source driver and power driving unit. The circuit can selectively activate different driving functions for different pixel blocks through control signals, allowing one circuit to perform multiple roles that previously required separate dedicated circuits for each pixel block.
2Adaptability or versatility
If separate power driving units are provided for each source driver, then driving voltage can be optimized for each block, but device complexity increases
Solution Approach 1:
The patent merges multiple power driving units into a single integrated power driving unit that shares common circuitry with the source driver. This unified structure reduces the total number of power driving units while maintaining the capability to provide optimized driving voltages to different pixel blocks through selective activation and control signal management.
Solution Approach 2:
The integrated power driving unit incorporates dynamic control capabilities, allowing it to selectively activate different driving functions for different pixel blocks based on control signals. This dynamic switching enables voltage optimization for each block without requiring permanently dedicated power driving units for each block, thereby reducing overall device complexity.
3Adaptability or versatility
If distributed source drivers are used, then display parameters can be adjusted per block, but the number of components increases
Solution Approach 1:
The patent merges multiple source drivers into a single integrated source driver that can sequentially control different pixel blocks. The integrated circuit includes multiple driving units that are activated in sequence or simultaneously based on display requirements, reducing the total number of separate source driver components while maintaining per-block display parameter adjustment capabilities.
Solution Approach 2:
The integrated source driver incorporates dynamic switching capabilities that allow it to selectively activate different driving functions for different pixel blocks. Through control signals, the circuit can dynamically adjust which driving unit serves which pixel block, enabling flexible display parameter adjustment without requiring permanently dedicated source drivers for each block.
Data Source
AI summary
A source driving system includes first and second source driving integrated circuits. The first driving integrated circuit includes a first source driver for receiving first display data and driving pixels in a first block of a display panel according to the first display data. The second source driving integrated circuit includes a second source driver electrically connected to the first source driver for receiving second display data and driving pixels in a second block of the display panel according to the second display data. The first and the second source drivers generate first and second display parameters according to the first and the second display data respectively. The second display parameter is transmitted from the second source driver to the first source driver. The first source driver generates a third display parameter according to the first and second parameters and transmits the third display parameter to the second source driver.