Display Panel Capacitance Compensation for Uniform Transmittance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in increasing the screen-to-body ratio while maintaining light transmittance and display uniformity, particularly in regions with integrated photo-sensitive sensors like cameras, where pixel drive circuits and light-emitting elements are arranged to optimize image display and camera functionality.
Innovation Solution
A display panel design featuring a light-transmissive display region surrounded by a conventional display region, with pixel drive circuits and light-emitting elements arranged to minimize connection line lengths and utilize compensation portions to equalize capacitance differences, ensuring uniform light transmittance and image display across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If pixel drive circuits are arranged in the conventional display region to drive light-emitting elements in the light-transmissive display region, then the screen-to-body ratio is increased, but the connection line lengths become unequal causing display uniformity degradation
Solution Approach 1:
The patent introduces compensation portions that change the electrical parameters (capacitance) of the connection lines to equalize the charging/discharging characteristics. By adding capacitance to the shorter connection line, the system compensates for the length difference and achieves uniform display across both sides of the light-transmissive display region.
Solution Approach 2:
The compensation portions act as intermediary elements inserted into the connection lines. These additional capacitive components mediate the electrical signal transmission, balancing the timing and voltage differences caused by unequal connection line lengths, thereby enabling uniform operation despite the asymmetric layout.
2Illumination intensity
If the light-transmissive display region is surrounded by conventional display region, then light transmittance is improved, but connection line capacitance differences cause charging/discharging time variations
Solution Approach 1:
The patent modifies the electrical parameters of the connection lines by introducing compensation portions with specific capacitance values. This parameter change equalizes the total capacitance in both connection lines, thereby synchronizing the charging and discharging times of light-emitting elements on both sides and eliminating time variations.
Solution Approach 2:
The compensation portions work to create equipotential conditions in terms of electrical charging/discharging characteristics. By balancing the capacitance values, the system ensures that both connection lines experience equivalent time constants, achieving uniform temporal behavior despite spatial asymmetry.
Data Source
AI summary
Provided is a display panel. The display panel includes: a substrate, at least one row of light-emitting elements disposed on the substrate, a plurality of pixel drive circuits, a plurality of connection lines, and a plurality of compensation portions. A length of a first connection line electrically connected to a first pixel drive circuit is less than a length of a second connection line electrically connected to a second pixel drive circuit. A capacitance of the first connection line is compensated by electrically connecting the compensation portion to the first connection line, and thus a difference between the capacitance of the first connection line and a capacitance of the second connection line is reduced.