Liquid Crystal Display Panel Alternating Pixel Row Selection
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Solution Overview
Problem
Display unevenness occurs in large-size liquid crystal display panels driven by a method that selects scan lines in a two by two manner, leading to suboptimal display quality, particularly in high-definition applications.
Innovation Solution
A liquid crystal display panel with a matrix arrangement of pixels, including first and second subpixels connected through TFTs, gate bus lines, and source bus lines, where pixel row pairs are simultaneously selected with different source bus lines, and frame periods are alternated to vary the combination of pixel rows and polarity of display signal voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scan lines are selected in a two by two manner to increase charge time per pixel, then productivity is improved, but display unevenness occurs leading to deteriorated manufacturing precision
Solution Approach 1:
The patent applies periodic action by alternately switching between first and second frame periods. In the first frame period, pixel rows at odd positions are selected simultaneously with even positions. In the second frame period, the selection pattern is reversed. This periodic switching eliminates display unevenness while maintaining the productivity benefits of simultaneous pixel row selection.
Solution Approach 2:
The patent implements dynamics by making the pixel row selection pattern changeable between frame periods. The selection of pixel rows is not fixed but dynamically alternates between different patterns (first pattern for odd rows, second pattern for even rows), allowing the system to adapt and eliminate display unevenness while maintaining high charge time efficiency.
2Illumination intensity
If frame period is shortened to improve display quality of moving images, then brightness is improved, but charge time for each pixel becomes insufficient
Solution Approach 1:
The patent merges the selection of multiple pixel rows (both odd and even positions) into the same frame period by selecting them simultaneously. This combining of previously sequential selections into parallel operations increases the charge time available per pixel without extending the overall frame period, thereby maintaining display brightness while improving charge time sufficiency.
Data Source
AI summary
A liquid crystal display panel (100) includes a plurality of pixels, each of the pixels including a first subpixel and a second subpixel arranged so as to adjoin each other in a column direction. In any given frame period, the plurality of pixels include a plurality of pixel row pairs each associated with two selected pixel rows. In each pixel column, one pixel of each of the plurality of pixel row pairs is connected with a first source bus line (14a) associated with the pixel column, and the other pixel is connected with a second source bus line (14b) associated with the pixel column, and the plurality of pixel row pairs are each simultaneously selected. A plurality of frame periods include a first type frame period and a second type frame period differing in terms of combinations of two pixel rows to be associated with each of the plurality of pixel row pairs.