Display Panel Lighting Test Circuit Area Minimization
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Solution Overview
Problem
Display panels require a significant non-display area for lighting test circuits, which increases the size and weight of display devices, and existing solutions do not efficiently minimize this area while effectively performing lighting tests.
Innovation Solution
A display panel design that incorporates a first and second lighting test circuit in the non-display area, with a demultiplexer, to provide lighting test voltages to pixel rows through data lines, and a data integrated circuit mounted in a mounting area, allowing for a minimized non-display area by overlapping or cutting the second lighting test circuit after testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lighting test circuit is formed in the non-display area, then lighting test function is achieved, but the non-display area increases
Solution Approach 1:
The non-display area is segmented into a first region for the lighting test circuit and a second region for the data integrated circuit mounting. This segmentation allows the lighting test circuit to be positioned in the first region while the data integrated circuit is mounted in the second region, enabling both functions to coexist without excessive overlap and minimizing the total non-display area.
Solution Approach 2:
The patent utilizes spatial arrangement in multiple directions by extending data lines from the display area through the non-display area. The lighting test circuit is positioned to overlap partially with the data integrated circuit mounting area in a controlled manner, effectively using dimensional space to reduce the overall non-display area footprint while maintaining test functionality.
2Area of stationary object
If the non-display area is minimized, then device size and weight are reduced, but lighting test capability may be compromised
Solution Approach 1:
The lighting test circuit is designed to perform testing operations before the data integrated circuit is fully mounted or before final assembly. This preliminary action allows the lighting test to be completed when the non-display area is at its minimum, ensuring test capability is maintained while achieving compact device dimensions.
Solution Approach 2:
The patent uses data lines as intermediaries that extend from the display area through the non-display area to connect with both the lighting test circuit and the data integrated circuit. This intermediary structure allows the lighting test circuit to access pixel rows through existing data lines without requiring separate dedicated test lines, thereby minimizing the non-display area while preserving full lighting test capability.
Data Source
AI summary
A display panel may include a plurality of pixel groups, a first lighting test circuit for testing at least one pixel of the plurality of pixel groups, a demultiplexer for providing data signals to the plurality of pixel groups, and a second lighting test circuit for testing one or more pixels of the plurality of pixel groups. At least one of the first lighting test circuit and the demultiplexer is positioned between the plurality of pixel groups and the second lighting test circuit.