Liquid Crystal Display Device Color Sequential Data Arranging Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional data conversion methods for display devices are not suitable for the color sequential display (CSD) method, as they fail to appropriately reproduce images when using three independent light sources for RGB colors, leading to inefficiencies in aperture ratio and driving circuits.
Innovation Solution
An image data arranging circuit sorts and arranges input image data by color to form sub-frames for each light source, with a memory unit storing these sub-frames, and a data driver applies the arranged data sequentially to pixels, using the same gate signal for multiple rows to improve pixel charging rate and reduce the number of gate lines and driving circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional data conversion method is used for display device, then single light source can be controlled, but three-color light sources cannot appropriately reproduce images
Solution Approach 1:
The patent divides the display frame into three sub-frames corresponding to three color light sources (R, G, B). Each sub-frame contains image data for a specific color period, allowing independent control and accurate reproduction of each light source's contribution to the final image.
Solution Approach 2:
The patent performs preliminary arrangement of image data by sorting and organizing RGB image data into three separate sub-frames before display. This pre-processing ensures that when the three-color light sources are activated sequentially, the corresponding image data is already prepared and synchronized with each light source's activation period.
2Manufacturing precision
If pixel is divided into three sub-pixels, then color filtering can be achieved, but aperture ratio and yield are reduced
Solution Approach 1:
The patent uses periodic activation of three color light sources in sequence (R period, G period, B period) within one frame time. This temporal separation replaces the spatial separation of sub-pixels, allowing each pixel to be controlled by a single light source at a time, thereby maintaining high aperture ratio and yield while achieving full-color display.
Solution Approach 2:
The patent transitions from spatial color separation (three sub-pixels arranged horizontally or vertically) to temporal color separation (sequential activation of three light sources). This dimensional change from space to time allows full-color display without dividing the pixel structure, preserving aperture ratio and manufacturing yield.
3Productivity
If three-color light sources are used sequentially, then aperture ratio can be improved, but conventional data method cannot appropriately reproduce images
Solution Approach 1:
The patent segments the image data into three color-specific sub-frames (R sub-frame, G sub-frame, B sub-frame) that correspond to the three light sources. This segmentation enables accurate matching of image data with each light source's activation period, ensuring proper image reproduction while maintaining the benefits of sequential color display.
Solution Approach 2:
The patent introduces an image data arranging circuit as an intermediary between the conventional data input and the display device. This circuit performs color separation and sub-frame generation, acting as a mediator that converts conventional RGB image data into the format required for sequential color display, thereby enabling accurate image reproduction with three-color light sources.
4Manufacturing precision
If different gate signals are applied to each row, then precise pixel control can be achieved, but number of gate lines and driving circuits increases
Solution Approach 1:
The patent merges the control of multiple rows by applying the same gate signal to multiple rows simultaneously during each color period. This reduces the number of gate lines and driving circuits while maintaining precise pixel control through the combination of row-group gating and color-period timing control.
Solution Approach 2:
The patent makes gate signals universal by using the same gate signal for multiple rows across different color periods. Each gate line serves multiple functions: controlling multiple rows and operating during different color periods (R, G, B), thereby reducing the overall number of gate lines and driving circuits required.
Data Source
AI summary
A liquid crystal display device employing the color sequential display method includes multiple, different color light sources. An image data arranging circuit sorts image data input from an external source for each frame according to color and arranges the sorted image data into a plurality of sub-frames. A data driver applies the arranged image data for each color to the liquid crystal panel sequentially according to the sub-frames.