Liquid Crystal Display Counter Electrode Drive Circuit Scale Reduction
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Solution Overview
Problem
The existing liquid crystal display devices with counter electrode signal drive circuits face challenges in miniaturization due to the large scale of these circuits, which increases the occupied area on the substrate and hampers the reduction of the picture frame size.
Innovation Solution
The proposed liquid crystal display device incorporates a configuration where one control signal outputting part is shared by two counter electrode signal lines, with transistors and output signal lines strategically connected to manage voltage outputs, allowing for a reduced scale of counter electrode signal drive circuits by alternating voltage values between counter electrode signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a counter electrode signal drive circuit is provided for every counter electrode signal line, then the image display quality is maintained, but the scale of the whole counter electrode signal drive circuits becomes large
Solution Approach 1:
One control signal outputting part is shared by two counter electrode signal lines. The control signal outputting part outputs first and second control signals that are inverted from each other, and these control signals are used to drive two different counter electrode signal lines, thereby merging the control function for multiple lines into a single circuit unit.
Solution Approach 2:
The control signal outputting part serves multiple functions by being shared across two counter electrode signal lines. It generates both the first control signal for the first counter electrode signal line and the second control signal for the second counter electrode signal line, making the circuit multi-functional and reducing overall circuit scale.
2Area of stationary object
If the scale of the counter electrode signal drive circuits is reduced, then the circuit occupying area is decreased, but the image display quality may be compromised
Solution Approach 1:
By merging the control signal generation function for two counter electrode signal lines into one control signal outputting part, the circuit occupying area is reduced while maintaining the ability to provide proper control signals for image display quality through the inverted control signal arrangement.
Solution Approach 2:
The control signal outputting part alternates between outputting the first control signal and the second control signal in a periodic manner, with the signals being inverted from each other. This periodic action ensures that both counter electrode signal lines receive appropriate control signals for maintaining image display quality while using a reduced circuit scale.
Data Source
AI summary
A liquid crystal display device which can reduce a scale of the whole counter-electrode-signal drive circuits is provided. The liquid crystal display device includes: a substrate; a plurality of counter electrodes which are formed on the substrate corresponding to pixels; a plurality of counter electrode signal lines which are formed on the substrate, are electrically made conductive with the counter electrodes, extend in the X direction, and are arranged parallel to each other in the Y direction which intersects the X direction; and counter electrode signal drive circuits having control signal outputting parts which are mounted on the substrate at a rate of one control signal outputting part for two counter electrode signal lines.