LCD Subpixel Electrode Layout for Gamma Consistency
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Solution Overview
Problem
Liquid crystal displays (LCDs) face issues with display quality due to differences in gamma values between color filters, leading to phenomena like 'color clustering' and rough screen appearance, especially when capturing clouds, which affects the accuracy of color representation.
Innovation Solution
The LCD design includes a specific arrangement of gate lines, data lines, and thin-film transistors (TFTs) that allow for a unique configuration of subpixel electrodes and TFT positions, enabling improved light transmission through color filters, particularly for the blue filter, to maintain consistent gamma values across different color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a black matrix is formed around each pixel region and color filters are formed using inkjet method, then manufacturing flexibility and planarization are improved, but gamma value consistency between different color filters deteriorates
Solution Approach 1:
The patent applies local quality by making the pixel regions asymmetric - specifically, the blue pixel region is designed with a larger area than the red and green pixel regions. This local differentiation compensates for the inherent gamma value differences caused by the inkjet fabrication process, allowing each color filter to achieve consistent gamma characteristics despite being manufactured using the same general process
2Measurement precision
If accurate color capture correction is performed, then color accuracy is improved, but gamma value differences between color filters become more apparent, leading to color clustering
Solution Approach 1:
The patent implements preliminary action by pre-adjusting the physical dimensions of the pixel regions during the manufacturing stage. The blue pixel region is intentionally made larger before any color capture correction is applied. This preliminary structural adjustment ensures that when ACC correction is performed, all color filters start from an equal footing, preventing the emergence of gamma value differences and color clustering artifacts
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances display quality by preventing gamma value discrepancies between red, green, and blue filters, reducing 'color clustering' and improving the overall visual smoothness of the screen.
Implementation Method 1
voltages are applied to electrodes to generate an electric field. The alignment of liquid crystal molecules of the liquid crystal layer is determined according to the electric field applied thereto
Implementation Method 2
The alignment of liquid crystal molecules of the liquid crystal layer is determined according to the electric field applied thereto, and thus the amount of light that passes through the liquid crystal layer is controlled
Implementation Method 3
forming a color filter in each pixel region using an inkjet method
Data Source
AI summary
A liquid crystal display (“LCD”) includes; a gate line, a plurality of pairs of a first data line and a second data line which border a plurality of pixel regions and are disposed respectively on both sides of each pixel region, a plurality of pairs of first and second thin-film transistors (“TFTs”) which are connected to the gate line and a pair of the first and second data lines, and a first and second subpixel electrode disposed in each pixel region and connected to the first and second TFTs, respectively, wherein the pixel regions include first through third pixel regions arranged in the first direction, wherein at least one of the first and second TFTs of the second pixel region is disposed on a same side of an adjacent data line as the first and second subpixel electrodes of one of the first and third pixel regions.