Shift Register Gate Driver Layout to Cut LCD Driver IC Count
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Solution Overview
Problem
The high manufacturing costs of liquid crystal display devices are significantly increased by the need for a driving device, which includes expensive signal lines and driving IC chips, particularly due to the complexity and cost of data driving IC chips.
Innovation Solution
A shift register and display device design that incorporates a gate driver with stages configured to alternately output voltages to gate lines, reducing the number of data lines and data driving IC chips required, and integrating gate drivers into the panel assembly to lower production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a driving device with signal lines and driving IC chips is used to control liquid crystal display, then the display can be driven effectively, but the manufacturing cost increases considerably
Solution Approach 1:
The patent merges the gate driver function with the liquid crystal panel by integrating shift registers directly into the panel structure. The shift registers are formed using the same thin film transistor technology as the display panel, eliminating the need for separate driving IC chips and reducing manufacturing complexity while maintaining driving functionality
Solution Approach 2:
The shift register stages are designed to perform multiple functions: they generate gate signals, control scanning of gate lines, and interface with data lines through the pixel electrodes. This multi-functionality reduces the need for separate dedicated driving components
2Manufacturing precision
If multiple data lines and data driving IC chips are used to control pixel electrodes, then precise voltage control is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The gate driver is segmented into multiple shift register stages, where each stage controls a portion of the gate lines. This segmentation allows precise control of individual gate lines while reducing the overall complexity compared to having separate driving IC chips for each data line
Solution Approach 2:
The shift register stages act as intermediary components between the external control signals and the pixel electrodes. They receive clock signals and control signals, process them through sequential stages, and generate the appropriate gate signals, thereby simplifying the interface requirements
Data Source
AI summary
A shift register includes a plurality of stages connected to one another to sequentially generate output signals. Each of the stages has a plurality of output terminals, and each of the output terminals is connected to at least two gate lines and outputs a first output voltage alternately to the at least two gate lines to turn on thin film transistors.