Source Driver Circuit Heat Reduction via Gamma Voltage Extraction
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Solution Overview
Problem
The existing gamma voltage driver circuit in thin film transistor liquid crystal display devices has high power consumption and heat generation due to large voltage differences across operational amplifiers, making it difficult to integrate with other driver circuits.
Innovation Solution
A source driver circuit is designed with operational amplifiers connected to corresponding pixel gray scale reference voltages, reducing the need for operational amplifiers in the gamma driver circuit and facilitating integration by distributing heat generation and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If operational amplifiers are used in the gamma voltage driver circuit to convert digital signals to analog signals, then the gray scale reference voltage can be generated, but the power consumption and heat generation increase due to large voltage differences across the operational amplifiers
Solution Approach 1:
The patent extracts the operational amplifiers from the gamma voltage driver circuit and relocates them to the source driver circuit. This separation removes the heat-generating components from the gamma driver, allowing it to be integrated with other driver circuits without temperature buildup, while the source driver circuit assumes the function of voltage amplification and transformation.
2Measurement precision
If operational amplifiers are used in the gamma voltage driver circuit, then gray scale reference voltages can be generated, but the circuit integration with other driver circuits becomes difficult due to heat buildup
Solution Approach 1:
The patent extracts the operational amplifiers from the gamma voltage driver circuit and relocates them to the source driver circuit. This separation removes the heat-generating components from the gamma driver, allowing it to be integrated with other driver circuits without temperature buildup, while the source driver circuit assumes the function of voltage amplification and transformation.
3Measurement precision
If operational amplifiers are used in the gamma voltage driver circuit to amplify analog signals, then pixel gray scale reference voltages are produced, but the power consumption increases due to large voltage differences
Solution Approach 1:
The patent extracts the operational amplifiers from the gamma voltage driver circuit and relocates them to the source driver circuit. This separation removes the heat-generating components from the gamma driver, allowing it to be integrated with other driver circuits without temperature buildup, while the source driver circuit assumes the function of voltage amplification and transformation.
Data Source
AI summary
In the technical field of display, a source driver circuit and a display device according to the present disclosure, which can effectively reduce the heat generating efficiency of a gamma driver circuit cooperating with the source driver circuit, lower the temperature of the gamma driver circuit, and facilitate the integration of the gamma driver circuit with other driver circuits, are provided. The source driver circuit is in connection with several pixel gray scale reference voltages from the gamma driver circuit, and comprises several operational amplifiers, the number of which equals to that of the pixel gray scale reference voltages outputted from the gamma driver circuit, and the operational amplifiers each are connected with a corresponding pixel gray scale reference voltage.