Display Adjusting Device for Lateral Screen-Splitting Correction
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Solution Overview
Problem
Display devices with high-resolution display panels experience lateral screen-splitting deficiencies due to variations in output voltages from different gate drive circuit units, which cannot be adequately addressed by existing power source circuits that only provide a single gamma main voltage.
Innovation Solution
A display adjusting device with a start signal detection unit and a gamma main voltage setting unit that detects gate drive signals from each stage of gate drive circuit units and sets corresponding gamma main voltages to overcome the lateral screen-splitting issue by providing tailored gamma main voltages to different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single gamma main voltage AVDD is outputted by the power source circuit, then the device complexity is reduced, but the lateral screen-splitting deficiency caused by different gate drive circuit units cannot be overcome
Solution Approach 1:
The power source circuit is segmented to output multiple gamma main voltages (first gamma main voltage AVDD1 and second gamma main voltage AVDD2) corresponding to different gate drive circuit units. This segmentation allows each region to receive its dedicated voltage, eliminating lateral screen-splitting while maintaining manageable circuit complexity through modular voltage generation
Solution Approach 2:
Different regions of the display panel are provided with different gamma main voltages tailored to their specific gate drive circuit units. The first gamma main voltage AVDD1 is supplied to regions scanned by first gate drive circuit units, while the second gamma main voltage AVDD2 is supplied to regions scanned by second gate drive circuit units, ensuring local optimization of display quality
2Manufacturing precision
If multiple gamma main voltages AVDDs are provided to different regions, then the lateral screen-splitting deficiency is overcome, but the device complexity increases
Solution Approach 1:
The power source circuit dynamically selects and outputs appropriate gamma main voltages based on the scanning stage detected by the detection circuit. During first stage scanning, AVDD1 is outputted; during second stage scanning, AVDD2 is outputted. This dynamic adaptation enables multiple voltages for different regions while maintaining a relatively simple circuit structure through time-multiplexed voltage supply
3Manufacturing precision
If gamma main voltage is dynamically adjusted, then the lateral screen-splitting is alleviated, but the ease of operation is reduced
Solution Approach 1:
The power source circuit performs self-adjustment by automatically detecting the scanning stage through the detection circuit and autonomously selecting the appropriate gamma main voltage. The first gamma main voltage AVDD1 is automatically supplied during first stage scanning, and the second gamma main voltage AVDD2 is automatically supplied during second stage scanning, eliminating the need for manual voltage adjustment operations
Data Source
AI summary
A display adjusting device, a power source circuit, a display device and a display adjusting method are provided. The display adjusting device includes a start signal detection unit, configured to, in a case that a gate drive circuit including multiple stages of gate drive circuit units scans multiple rows of gate lines arranged in the display panel, detect a gate drive signal outputted by a last row of shift register unit included in each stage of gate drive circuit unit, where the gate drive signal serves as a start signal of a next stage of gate drive circuit unit adjacent to the stage of gate drive circuit unit, and a gamma main voltage setting unit, configured to set a corresponding gamma main voltage based on the start signal.