LCD Panel Driver Integration for Unfilled Pixel Cell Prevention
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Solution Overview
Problem
Liquid crystal display devices face challenges in reducing unit cost and preventing picture quality deterioration due to unfilled pixel cells, particularly with high power consumption and limited size and cost reduction in flexible printed circuit and gate-less designs.
Innovation Solution
The implementation of a liquid crystal display device with a built-in gate circuit and driving integrated circuit within the panel, where pixel cells are arranged with alternating colors along data lines and inverted video signal polarity is applied in units of data lines and gate lines, reducing the need for external gate drivers and minimizing pixel electrode size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If flexible printed circuit and gate-less design are used, then device thickness is reduced, but power consumption increases and cost reduction is limited
Solution Approach 1:
The patent combines the gate driver circuit and data driver circuit into a single integrated driver located at one corner of the liquid crystal panel. This merging of functions reduces the number of separate components and connection circuits, thereby reducing overall power consumption while maintaining the thin form factor achieved through the flexible printed circuit and gate-less design.
2Length of stationary object
If flexible printed circuit and gate-less design are used, then device thickness is reduced, but unit cost reduction is limited
Solution Approach 1:
By integrating both gate driver and data driver functions into a single driver IC, the patent reduces the number of separate components that need to be mounted and connected. This simplification of the assembly process and reduction of component count directly lowers manufacturing costs while preserving the thin device profile.
Solution Approach 2:
The single integrated driver performs multiple functions - both gate driving and data driving - that would traditionally require separate circuits. This multi-functionality reduces the overall system complexity and component count, leading to lower unit costs while maintaining the compact design.
3Ease of manufacture
If pixel cells are arranged with alternating colors along data lines, then manufacturing is simplified, but picture quality may deteriorate due to unfilled pixel cells
Solution Approach 1:
The patent implements a pixel arrangement where alternating colors are pre-configured along data lines during manufacturing. This preliminary arrangement simplifies the manufacturing process by reducing the complexity of color filter alignment and pixel formation, while the design ensures complete pixel coverage to maintain picture quality.
Data Source
AI summary
A liquid crystal display device is disclosed, which can reduce a unit cost and prevent deterioration of picture quality caused by unfilled pixel cells, the liquid crystal display device comprising a liquid crystal panel including a plurality of pixel cells formed at every regions defined by ‘n’ gate lines and ‘m’ data lines, three colors alternatively arranged along the data line direction, and the same colors arranged along the gate line direction; a gate built-in circuit, built-in the liquid crystal panel, for supplying gate-on voltages to the gate lines; and a driving integrated circuit, formed in the liquid crystal panel, for driving the gate built-in circuit, inverting a polarity of video signal in the unit of each data line and at least three gate lines, and supplying the video signal having the inverted polarity to the data lines.