Single-Chip Voltage Generator for LCD Panel Integration
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Solution Overview
Problem
The existing liquid crystal display (LCD) devices have a large size and number of parts due to the numerous voltage generating circuits mounted on a printed circuit board, increasing manufacturing time and cost.
Innovation Solution
A single-chip drive voltage generating section is used to supply voltages to the liquid crystal panel, gate driver, data driver, and timing controller, reducing the number of components on the printed circuit board and minimizing board size by integrating the gate high and low voltage, common voltage, and supply voltage circuits into a single chip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple voltage generating circuits are individually mounted on the printed circuit board, then the liquid crystal display device can generate all required voltages, but the size and number of parts increase
Solution Approach 1:
The patent merges multiple voltage generating circuits (gate high voltage generating circuit, gate low voltage generating circuit, common voltage generating circuit, and drive voltage generating circuit) into a single integrated voltage generating section. This integration reduces the number of separate circuit devices from four to one, directly addressing the technical contradiction by maintaining complete voltage generation capability while significantly reducing device complexity and the number of parts.
2Reliability
If multiple voltage generating circuits are individually mounted on the printed circuit board, then all required voltages can be generated, but the printed circuit board size increases
Solution Approach 1:
The patent combines four separate voltage generating circuits into a single integrated voltage generating section, which dramatically reduces the area occupied on the printed circuit board. This merging approach maintains all necessary voltage generation functions while minimizing the board area, resolving the contradiction between voltage generation capability and board size.
3Reliability
If multiple voltage generating circuits are individually mounted on the printed circuit board, then all required voltages can be generated, but manufacturing time and cost increase
Solution Approach 1:
The patent integrates multiple voltage generating circuits into a single voltage generating section, which reduces the number of assembly steps and component mounting operations required during manufacturing. This integration improves manufacturing efficiency and reduces production time and cost, while still providing complete voltage generation capability for all circuit components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the size and thickness of the LCD device by minimizing the number of circuit devices and board area, while shortening wire lengths, thereby decreasing manufacturing costs and time.
Implementation Method 1
The LCD device displays an image using the optical anisotropy and the polarity of a liquid crystal. That is, the liquid crystal molecules included in the liquid crystal can be arranged in a predetermined (constant) direction. Further, the direction of the liquid crystal molecule arrangement can be controlled by applying an electric field to the liquid crystal.
Data Source
AI summary
A liquid crystal display device including a liquid crystal panel, a gate driver configured to drive a plurality of gate lines on the panel, a data driver configured to drive a plurality of data lines on the panel in response to the pixel data stream, a timing controller configured to control the gate driver and the data driver, and a single-chip drive voltage generating section configured to supply voltages used by the common electrode on the liquid crystal panel, the gate driver, the data driver, and the timing controller using an external input voltage.