Area-Saving Display Panel Driving Circuit with Segmented Voltage Boosters
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Solution Overview
Problem
Existing driving circuits for display panels require large external storage capacitors, increasing the circuit area and manufacturing costs, as they need to maintain the output signal level of digital-to-analog converting circuits.
Innovation Solution
The proposed area-saving driving circuit uses multiple voltage booster units to provide supply voltage to driving units, reducing the need for an external storage capacitor or allowing its elimination, thereby shrinking the circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage booster circuit is connected externally to maintain output signal level, then the signal level is maintained, but the circuit area increases due to large storage capacitor requirements
Solution Approach 1:
The patent divides the single voltage booster circuit into multiple voltage booster circuits, with each circuit serving a specific driving unit. This segmentation allows each voltage booster to use a smaller storage capacitor instead of one large capacitor, thereby reducing the overall circuit area while maintaining the required output signal level for each driving unit.
Solution Approach 2:
Each voltage booster circuit is locally configured to serve its specific driving unit with appropriate voltage and capacitor requirements. This local quality approach ensures that each driving unit receives the necessary voltage stabilization without requiring a large centralized storage capacitor, thus reducing the overall circuit area.
2Reliability
If a large external storage capacitor is used to maintain voltage level, then the voltage level is stable, but manufacturing cost increases
Solution Approach 1:
The patent segments the single large storage capacitor into multiple smaller storage capacitors, each associated with a specific voltage booster circuit. This segmentation reduces the complexity of external component selection and assembly, lowers manufacturing costs, while still providing sufficient voltage stability for each driving unit through localized capacitor-voltage booster pairs.
3Device complexity
If the storage capacitor is disposed inside the driving circuit, then external connections are simplified, but the driving circuit area increases
Solution Approach 1:
The patent segments the storage capacitor placement across multiple localized positions within the driving circuit, with each voltage booster having its own small storage capacitor nearby. This segmentation allows the capacitors to be integrated inside the circuit without requiring a single large capacitor that would significantly increase the overall driving circuit area, thus balancing internal integration benefits with area constraints.
Data Source
AI summary
The present invention relates to an area-saving driving circuit for a display panel, which comprises a plurality of digital-to-analog converting circuits convert input data, respectively, and produce a pixel signal. A plurality of driving units are coupled to the plurality of digital-to-analog converting circuits, respectively. They produce a driving signal according to the pixel signal and transmit the driving signal to the display panel for displaying. A plurality of voltage booster units are coupled to the plurality of driving units, respectively, and produce a supply voltage according to a control signal. Then the supply voltage is provided to the plurality of driving units. Thereby, by providing the supply voltage to the plurality of driving units of the display panel by means of the plurality of voltage booster units, the area of the external storage capacitor is reduced. Alternative, the external storage capacitor can be even not required.