Pentile Flat Panel Pixel Aging Without Brightness Differences
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Solution Overview
Problem
In flat panel display devices with a pentile structure, the alternation of test and aging voltages applied to pixels can cause brightness differences and require additional equipment or modifications, leading to increased costs during the lighting test and aging process.
Innovation Solution
A lighting tester applies test and aging voltages through data lines, synchronizing control signals with scan signals to ensure each pixel column receives the appropriate voltage, preventing brightness differences without additional equipment or modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test and aging voltages are alternately applied to pixels in a pentile structure through data lines, then lighting test and aging can be performed, but brightness differences occur between pixels and additional equipment or modifications are required
Solution Approach 1:
The patent applies periodic action by alternating the application of first and second voltages to different pixel columns in a time-division manner. During a first time period, the first voltage is applied to the first pixel column and the second voltage is applied to the second pixel column. During a second time period, the voltage application is reversed. This periodic switching enables uniform aging of all pixels without requiring additional equipment, as each pixel receives both voltage types alternately.
Solution Approach 2:
The patent employs dynamics by making the voltage application configuration changeable over time. The lighting tester dynamically switches which pixel column receives which voltage based on the current time period. This dynamic reconfiguration allows the same equipment to uniformly age all pixels in a pentile structure without requiring static additional equipment for each pixel type.
2Manufacturing precision
If additional equipment or modifications are made to test and aging equipment for pentile structure, then each pixel can be properly tested and aged, but costs increase
Solution Approach 1:
The patent applies universality by designing a lighting tester that can universally test and age all types of pixels (first pixels, second pixels, and third pixels) using the same equipment. The tester switches its configuration over time to apply appropriate voltages to different pixel columns, making a single piece of equipment multi-functional rather than requiring separate dedicated equipment for each pixel type.
Solution Approach 2:
The patent uses parameter changes by varying the voltage application parameters (which pixel column receives which voltage) over time rather than changing the physical equipment. The lighting tester maintains the same hardware configuration but changes the electrical parameters dynamically, achieving accurate pixel testing and aging without additional equipment costs.
3Illumination intensity
If first and second pixels are alternately arranged in one scan line in a pentile structure, then full color display is achieved, but brightness differences and insufficient aging occur during testing
Solution Approach 1:
The patent resolves the brightness uniformity and aging completeness issue by applying periodic action. During a first time period, the first voltage is applied to the first pixel column and the second voltage is applied to the second pixel column. During a second time period, the voltage application is reversed. This ensures that over time, all pixels receive both voltage types uniformly, achieving both brightness uniformity and complete aging without requiring changes to the pentile pixel arrangement.
Data Source
AI summary
A flat panel display device formed in a pentile structure is provided, which includes a pixel portion and a lighting tester. The pixel portion includes a first pixel column, a second pixel column and a third pixel column. In the first pixel column, first pixels for displaying a first color and second pixels for displaying a second color are alternately arranged in a direction the data lines. In the second pixel column, first and second pixels arranged in reverse order of the first pixel column in a direction parallel to the data lines. In the third pixel column, third pixels for displaying a third color are arranged in a direction parallel to the data lines. The lighting tester applies a first voltage to the first pixel column and applies a second voltage to the second pixel column during a first time period. The lighting tester applies the second voltage to the first pixel column and applies the first voltage to the second pixel column during a second time period.