Gamma Reference Voltage Circuit for Display Panel Output Deviation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing size and resolution of display panels with multiple driving chips lead to deviations in output, degrading display quality due to variations in gamma reference voltage between chips.
Innovation Solution
A gamma reference voltage output circuit is designed with one-sided and opposite-sided gamma buffer circuits, power input circuits, and relay circuits to generate and isolate gamma reference voltages, ensuring matching voltages across driving chips, thereby eliminating output deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If multiple driving chips are mounted on a display panel to increase size and resolution, then the display panel can achieve larger size and higher resolution, but output deviation between driving chips degrades display quality
Solution Approach 1:
The patent divides the power input circuit into separate one-sided and opposite-sided power input circuits, with each driving chip having its own independent power input circuit. This segmentation allows each chip to generate gamma reference voltages independently, eliminating the influence of mutual interference between chips and ensuring consistent output across all driving chips.
Solution Approach 2:
The patent configures different power input circuits for one-sided and opposite-sided driving chips, allowing each region to have optimized local characteristics. The one-sided power input circuit generates gamma reference voltages suitable for one-sided chips, while the opposite-sided power input circuit generates voltages optimized for opposite-sided chips, ensuring local output consistency.
2Device complexity
If gamma reference voltages are shared between driving chips, then circuit complexity is reduced, but output deviation occurs due to variations in voltage characteristics
Solution Approach 1:
The patent segments the gamma reference voltage generation into separate one-sided and opposite-sided power input circuits, with each chip having its own independent voltage generation circuit. This eliminates the need for complex voltage matching and sharing mechanisms while ensuring precise voltage consistency for each driving chip.
Solution Approach 2:
The patent adjusts the gamma reference voltage parameters independently for one-sided and opposite-sided power input circuits, allowing each circuit to optimize its voltage characteristics according to the specific requirements of its driving chip, thereby achieving precise voltage matching without complex sharing mechanisms.
Data Source
AI summary
The present embodiment relates to a gamma reference voltage output circuit of a display device, and more particularly, to a gamma reference voltage output circuit having a structure for sharing an element required for outputting a gamma reference voltage in the gamma reference voltage output circuit included in each of a plurality of driving chips.