Display Panel Driving Circuit Adjusts Charging Time for Uniform Brightness
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Solution Overview
Problem
Conventional TFT-LCD display devices experience uneven brightness across the display panel due to attenuated scanning signals from the proximal end to the distal end, leading to inefficient charging and display quality issues.
Innovation Solution
A display panel with a driving circuit comprising a first and second circuit module, where the second circuit module adjusts scanning signals based on a default charging timing, including multiple charging periods, to ensure uniform charging of light emitting modules, using modules like scanning signal adjustment output modules, adjustment sub-modules, and control switch elements to synchronize charging times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If scanning signals are transmitted from proximal end to distal end in conventional TFT-LCD devices, then the display can be driven, but the scanning signals are attenuated causing uneven charging time and brightness across different areas
Solution Approach 1:
The display panel is divided into multiple areas (first area, second area, third area) with different charging time requirements. Each area is assigned a specific charging time period (first charging time period, second charging time period, third charging time period) to compensate for signal attenuation. This segmentation allows different regions to be charged at different times, ensuring uniform brightness across the entire display panel.
Solution Approach 2:
Different areas of the display panel are given different charging characteristics. The first area (proximal end) receives charging signals in the first charging time period, the second area (middle) in the second charging time period, and the third area (distal end) in the third charging time period. This local differentiation compensates for the signal attenuation that occurs during transmission from proximal to distal end.
2Illumination intensity
If conventional methods adjust data signal and scanning signal phases to improve uneven charging, then display effect is improved, but the adjustment process becomes complicated and efficiency decreases
Solution Approach 1:
The display panel incorporates a charging time adjustment circuit that automatically determines the charging time period for each area based on its position. The circuit includes comparison modules that compare charging voltages and control modules that adjust charging times accordingly. This self-service mechanism eliminates the need for complex manual signal phase adjustments while achieving uniform display效果.
3Productivity
If scanning signals are transmitted over long distances in TFT-LCD devices, then the entire panel can be scanned, but signal attenuation causes middle area charging time to be much shorter than left and right end areas
Solution Approach 1:
The charging time for each area is dynamically adjusted based on its position and signal attenuation characteristics. The charging time adjustment circuit continuously monitors charging voltages and modifies charging time periods accordingly. This dynamic adjustment ensures that areas experiencing greater signal attenuation receive extended charging time, maintaining uniformity while preserving overall charging efficiency.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a display unit, the display unit includes a plurality of light emitting modules, and a driving circuit electrically connected to the display unit and drives the display unit to display. The driving circuit includes a first circuit module and a second circuit module, the second circuit module is electrically connected to the first circuit module and the display unit, respectively.