Color Filter Substrate with Asymmetric White Blocks for LCD Brightness
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Solution Overview
Problem
Conventional color filter substrates for liquid crystal displays face inefficiencies in production due to complex processes and high costs associated with pigment dispersion methods, and non-uniform color mixing issues in RGBW arrangements, which affect brightness and color accuracy.
Innovation Solution
A color filter substrate design featuring a base substrate with pixels comprising first filter blocks and colorful filter blocks, where each colorful filter block is adjacent to at least one first filter block, and a black matrix isolates them, along with a planarization layer to enhance uniformity and brightness, and the white filter blocks are uniformly distributed to improve light transmittance and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pigment dispersion method is used to form color filter blocks, then color filter substrate can be manufactured, but production efficiency is reduced and production cost is increased due to complex mask processes
Solution Approach 1:
The patent extracts and removes the complex mask processes from the conventional pigment dispersion method. By using inkjet printing technology, the color filter blocks are formed directly through selective ink deposition without requiring multiple mask alignment steps, thereby eliminating the production bottlenecks while maintaining manufacturing precision
Solution Approach 2:
The patent replaces the mechanical mask alignment system with a digital inkjet printing system. The inkjet method uses computer-controlled droplet deposition to form color filter blocks directly, substituting the mechanical mask positioning and alignment processes with a more efficient digital printing approach that improves productivity while maintaining precision
2Manufacturing precision
If pigment dispersion method is used to form color filter blocks, then color filter substrate can be manufactured, but production cost is increased due to multiple mask processes
Solution Approach 1:
The patent extracts and removes the expensive mask processes from the conventional manufacturing method. By using inkjet printing, the color filter blocks are formed directly through selective ink deposition without requiring multiple mask alignment steps, thereby eliminating the high costs associated with mask fabrication and alignment while maintaining manufacturing precision
Solution Approach 2:
The patent replaces expensive, reusable masks with a digital printing approach that uses inexpensive inkjet droplets. Each color filter block is formed by direct ink deposition, eliminating the need for costly mask materials and alignment mechanisms, thereby significantly reducing production costs while maintaining precision
3Illumination intensity
If W region is adjoining R, G, or B regions in conventional RGBW arrangement, then light transmittance is improved, but color mixing becomes non-uniform affecting brightness and color accuracy
Solution Approach 1:
The patent applies local quality by creating different spatial arrangements of white and color filter blocks within the pixel matrix. By strategically positioning white filter blocks adjacent to specific color regions (R, G, or B) rather than uniformly distributing them, the design optimizes local color mixing characteristics while maintaining overall uniformity across the display surface
Solution Approach 2:
The patent introduces asymmetry in the arrangement of white filter blocks relative to color filter blocks. Instead of symmetric or uniform distribution, the white regions are positioned asymmetrically adjacent to specific color regions, creating optimized local mixing zones that improve both color uniformity and light transmittance through non-uniform spatial distribution
Data Source
AI summary
Embodiments of disclosed technology provide a color filter substrate and a liquid crystal display having the same. The color filter substrate comprises: a base substrate; a plurality of pixels on the base substrate, each of which comprises first filter blocks and colorful filter blocks; and a black matrix disposed on the base substrate for isolating the filter blocks. In each of the pixels, each of the colorful filter blocks is disposed adjoining at least one first filter block to form a sub-pixel.