Display Panel Driving Circuit Voltage Boost Integration
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Solution Overview
Problem
The existing driving circuits for display panels require external storage capacitors, which increase manufacturing costs and circuit area due to their large capacitance, necessitating a reduction in the size of these components to meet the requirements of modern, compact electronic devices like smartphones.
Innovation Solution
The proposed driving circuit utilizes a voltage boost circuit to provide different supply voltages to digital-to-analog converting circuits and driving units, eliminating or minimizing the need for external storage capacitors by integrating them within the chip, thereby reducing circuit area and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external storage capacitors are used to maintain the level of the output signal of the digital-to-analog converting circuit, then the stability of the output signal is improved, but the manufacturing cost increases and the circuit area increases
Solution Approach 1:
The patent merges the storage capacitor function into the integrated circuit chip itself rather than using a separate external capacitor. The driving circuit includes an integrated storage capacitor that is built into the chip structure, eliminating the need for external capacitor devices and reducing both manufacturing cost and circuit area while maintaining signal stability.
Solution Approach 2:
The patent extracts the storage capacitor requirement from the external component list and integrates it into the driving circuit chip. By taking out the external capacitor dependency and embedding the storage function within the chip's internal architecture, the design achieves miniaturization and cost reduction while preserving the necessary signal maintenance function.
2Device complexity
If the storage capacitor is disposed in the driving circuit, then the external component count is reduced, but the area of the driving circuit increases
Solution Approach 1:
The storage capacitor is merged with the driving circuit chip as an integrated component rather than a separate external component. This integration eliminates the need for external capacitor devices and reduces the overall circuit area, as the storage function is embedded within the chip's internal structure rather than occupying additional external space.
3Device complexity
If a single power supply is used to provide power to both digital-to-analog converting circuits and driving units, then the device complexity is reduced, but the voltage requirements and signal stability become more difficult to maintain
Solution Approach 1:
The patent segments the power supply into two separate voltage sources: a first power supply for the digital-to-analog converting circuits and a second power supply for the driving units. This segmentation allows each circuit type to receive the appropriate voltage level, maintaining signal stability and meeting specific voltage requirements while keeping the overall power supply structure relatively simple through the use of separate but coordinated power sources.
Data Source
AI summary
The present invention relates to a driving circuit of a display panel. A plurality of driving units produce a reference driving voltage according to a gamma voltage of a gamma circuit, respectively. A plurality of digital-to-analog converting circuits receive the reference driving voltages output by the plurality of driving units, and select one of the plurality of reference driving voltage as a data driving voltage according to pixel data, respectively. The plurality of digital-to-analog converting circuits transmit the plurality of data driving voltages to the display panel for displaying images. A voltage boost circuit is used for producing a first supply voltage and providing the first supply voltage to the plurality of digital-to-analog converting circuits. At least a voltage boost unit is used for producing a second supply voltage and providing the second supply voltage to the plurality of driving units.