Display Voltage Trace Segmentation for Uniform Sub-Pixel Brightness
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Solution Overview
Problem
In self-emissive display devices, the inconsistency in image brightness is caused by sub-pixels receiving different driving voltages due to varying equivalent resistances in voltage traces, leading to non-uniform brightness across the display.
Innovation Solution
The implementation of an electronic device with multiple voltage traces and region electrodes, where each voltage trace is electrically insulated from the others and connected to a voltage source module that provides distinct driving voltages, ensuring each region electrode receives a consistent driving voltage regardless of its distance from the source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same voltage source is used for all sub-pixels, then the device complexity is reduced, but the image brightness uniformity deteriorates due to different equivalent resistances in voltage traces
Solution Approach 1:
The voltage source module is segmented into multiple independent voltage sources, with each voltage source dedicated to a specific voltage trace. This segmentation allows each sub-pixel region to receive precisely controlled driving voltage independent of other regions, eliminating the brightness uniformity issues caused by varying equivalent resistances in different voltage traces while maintaining manageable device complexity through modular architecture
Solution Approach 2:
Each voltage trace is assigned a dedicated voltage source that provides locally optimized driving voltage according to the specific requirements of that trace's equivalent resistance and distance characteristics. This local quality approach ensures that each region receives the appropriate voltage level needed to achieve uniform brightness, rather than applying a uniform voltage source configuration across the entire display
2Area of stationary object
If voltage traces are extended to reach distant sub-pixels, then the coverage area is increased, but the equivalent resistance increases causing voltage drop and brightness inconsistency
Solution Approach 1:
The display area is segmented into multiple voltage trace regions, each served by its own dedicated voltage source. This allows the overall coverage area to be extended without increasing the equivalent resistance of individual traces, as each trace maintains a reasonable length while the system collectively covers the entire display area through multiple segmented voltage supply zones
Solution Approach 2:
Dedicated voltage sources act as intermediaries between the power supply system and distant sub-pixels. These intermediary voltage sources compensate for the effects of trace resistance and distance by providing locally generated driving voltage, eliminating the voltage drop problem that would otherwise occur in extended voltage traces
Data Source
AI summary
An electronic device is provided and includes a first voltage trace, a second voltage trace, a first region electrode, a second region electrode, and a voltage source module. The second voltage trace is electrically insulated from the first voltage trace, the first region electrode is electrically connected to the first voltage trace, and the second region electrode is electrically connected to the second voltage trace. The voltage source module provides a first driving voltage to the first voltage trace and provides a second driving voltage to the second voltage trace, in which the first driving voltage is different from the second driving voltage. In a top-view direction of the electronic device, the first voltage trace is separated from the second voltage trace, and the first voltage trace and the second voltage trace are formed of a conductive layer.