Dual-Pitch Pixel Electrode Layout for Uniform Display Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices, such as LCDs and OLEDs, face challenges in achieving optimal image display quality due to variations in pixel pitch and resolution across different display areas, leading to inconsistencies in light transmittance and luminance.
Innovation Solution
The display device incorporates a first and second display area with distinct pixel electrode pitches and lengths, along with a unique transistor and signal line configuration, including a pair of first transistors with connected driving gate electrodes and additional transistors, to enhance light transmittance and resolution, particularly in the second display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform pixel pitch is used across all display areas, then manufacturing is simplified, but image display quality and light transmittance consistency deteriorate
Solution Approach 1:
The patent applies different pixel pitches to different display areas: a first pixel pitch in the first display area and a second pixel pitch in the second display area. This local differentiation allows each area to be optimized for its specific function (high resolution for main display, light transmittance for sensor area) while maintaining overall manufacturing feasibility through a systematic approach.
2Illumination intensity
If pixel electrodes are made larger to increase light transmittance, then light transmittance improves, but resolution and pixel density deteriorate
Solution Approach 1:
The display area is segmented into a first display area with smaller pixel electrodes optimized for resolution and a second display area with larger pixel electrodes optimized for light transmittance. This segmentation allows each region to fulfill its specific functional requirement without compromising the other.
Solution Approach 2:
Different pixel electrode sizes are applied to different spatial locations: smaller electrodes in the first display area for high resolution imaging, and larger electrodes in the second display area for enhanced light transmittance to the sensor, achieving local optimization of both parameters.
3Reliability
If more transistors are added to control pixel circuits, then driving capability and signal control improve, but device complexity increases
Solution Approach 1:
The patent merges the driving gate electrodes of the first and second transistors into a single common driving gate electrode. This consolidation reduces the total transistor count and simplifies the circuit structure while maintaining the dual-transistor pixel circuit's driving capability and signal control functions.
Data Source
AI summary
A display device includes a first display area including a plurality of first pixel electrodes, and a second display area including a plurality of second pixel electrodes. A first pitch in a first direction of the plurality of first pixel electrodes is smaller than a second pitch in the first direction of the plurality of second pixel electrodes, and a length in the first direction of the first pixel electrodes is smaller than a length in the first direction of the second pixel electrode.