Tournament Circuit Data Line Path Alignment for Display Uniformity
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Solution Overview
Problem
Existing electro-optical devices face display unevenness due to varying parasitic capacitance on data lines, which affects the voltage output and brightness consistency across the display.
Innovation Solution
The electro-optical device incorporates a tournament circuit with selection circuits that align the path lengths of data lines, ensuring consistent capacitance across all lines, and a test output terminal to monitor voltage based on selection, thereby maintaining uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data lines have different lengths or configurations, then the device can handle various display sizes and resolutions, but parasitic capacitance varies across data lines causing display unevenness
Solution Approach 1:
The patent applies local quality by making each data line have the same number of taps (sampling points) along its length, regardless of the overall data line length. This ensures that parasitic capacitance is uniformly distributed and controlled at local segments, compensating for the varying total lengths of data lines in different display configurations. The consistent tap arrangement creates uniform electrical characteristics locally, resolving the display unevenness caused by global variations in data line length.
2Device complexity
If the number of taps is reduced to simplify the tournament circuit, then device complexity decreases, but measurement precision of voltage output deteriorates
Solution Approach 1:
The patent applies partial action by implementing a reduced number of taps (sampling points) in the tournament circuit compared to traditional designs. Specifically, the circuit uses a minimal set of taps that are strategically positioned to capture the essential voltage characteristics without requiring exhaustive sampling. This partial sampling approach sufficiently monitors voltage output for quality assurance while keeping the circuit complexity low and manageable.
Data Source
AI summary
In a first operation, in a tournament circuit, any one row of data lines is selected according to a selection signal, and a voltage of the selected data line is output to a test output terminal via an amplifier. In a second operation, a selection circuit in a first layer in the tournament circuit is in an off state between all the data lines and an input end of a selection circuit in a second layer.