Reference Voltage Circuit Layout for Lower Display Drive Power Loss
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Solution Overview
Problem
Conventional reference voltage generation circuits in display technology suffer from high power loss due to large potential differences between the data driving voltage and reference voltages, leading to increased temperature and reduced reliability of the drive circuit board.
Innovation Solution
A reference voltage generation circuit comprising a power supply module, a transformer module, and a voltage dividing module connected in sequence, where the transformer module steps down the benchmark voltage to a first data driving voltage less than the benchmark voltage, and the voltage dividing module generates a reference voltage less than the first data driving voltage, reducing the potential difference and power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the benchmark voltage is boosted to generate data driving voltage, then the reference voltages can be generated, but the potential difference between data driving voltage and reference voltages becomes large, causing high power loss
Solution Approach 1:
The voltage generation is segmented into multiple pathways: a first voltage generating sub-circuit generates first reference voltage from the boosted data driving voltage, while a second voltage generating sub-circuit generates second reference voltage directly from the benchmark voltage. This segmentation allows different voltage levels to be generated through optimal paths, reducing overall power loss.
Solution Approach 2:
The invention changes the generation parameter of reference voltages by providing two different generation pathways: one through voltage boosting and division, and another through direct voltage division from benchmark voltage. This parameter change enables flexible selection of generation paths based on voltage level requirements, minimizing potential differences and power loss.
2Device complexity
If the data driving voltage is used to generate all reference voltages, then voltage generation is simplified, but the power loss increases due to large potential difference
Solution Approach 1:
The voltage generation function is segmented between two sub-circuits: the first voltage generating sub-circuit handles reference voltages that can be efficiently derived from the data driving voltage, while the second voltage generating sub-circuit handles reference voltages that are more efficiently generated from the benchmark voltage. This segmentation reduces power loss without significantly increasing overall circuit complexity.
Solution Approach 2:
The voltage dividing sub-circuit is designed with multi-functionality to perform both voltage division from the data driving voltage and voltage division from the benchmark voltage. This universal design allows a single sub-circuit to handle multiple voltage generation tasks through different input sources, reducing power loss while maintaining reasonable complexity.
3Reliability
If the benchmark voltage is raised to data driving voltage through boost circuit, then reference voltages can be generated, but the temperature inside drive circuit board increases excessively
Solution Approach 1:
The power consumption is segmented and distributed across two independent voltage generation pathways. By generating certain reference voltages directly from the benchmark voltage without requiring full voltage boosting, the total power consumption is reduced, thereby reducing heat generation and temperature rise in the drive circuit board.
Solution Approach 2:
The invention converts the potentially harmful effect of voltage boosting (high power consumption and heat generation) into a beneficial solution by selectively applying voltage boosting only where necessary (for first reference voltage) while using direct voltage division for other reference voltages. This selective approach minimizes heat generation while still achieving all required voltage levels.
Data Source
AI summary
Please replace Abstract with the following amended Abstract: A reference voltage generation circuit is provided. The reference voltage generation circuit reduces a potential difference between a reference voltage less than a first data driving voltage and a data driving voltage, namely, the potential difference between a lower reference voltage and the data driving voltage is reduced. Therefore, the power loss of a voltage dividing module is reduced to prevent the problems of reduced reliability and reduced service life of a drive circuit board due to excessive internal temperature.