Display Driver Circuit Unified Power Supply Voltage
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Solution Overview
Problem
The existing display apparatuses face challenges in reducing power consumption and manufacturing costs due to the need for different transistor structures and power supply voltages for logic and amplifier units, which increases the number of manufacturing steps and costs.
Innovation Solution
A display apparatus with a driver circuit that includes a shift register circuit and an amplifier circuit, both supplied with the same power supply voltage, and transistors with gate insulating films of similar thickness, allowing for reduced power consumption and simplified power supply circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different transistor structures are arranged in one chip to meet different operational requirements, then the operational performance is improved, but the number of manufacturing steps increases and cost increases
Solution Approach 1:
The patent merges the logic unit and amplifier unit onto a single chip with unified transistor structures and power supply voltage, eliminating the need for multiple manufacturing processes. This integration maintains operational performance while reducing manufacturing complexity and cost.
Solution Approach 2:
The patent designs transistors with universal structures that can serve multiple functions in both logic and amplifier units. By using the same transistor structure and power supply voltage for different circuit functions, the patent reduces the number of manufacturing steps while maintaining adaptability.
2Reliability
If separate power supply circuits are provided for logic unit and amplifier unit, then the operational requirements are met, but the power supply circuit becomes complex and cost increases
Solution Approach 1:
The patent combines the power supply circuits for the logic unit and amplifier unit into a single unified power supply system. By providing the same power supply voltage to both units, the patent simplifies the power supply circuit structure and reduces cost while meeting operational requirements through proper circuit design.
3Power
If high power supply voltage is provided to amplifier unit, then the output voltage capability is improved, but the power consumption of the entire driver increases
Solution Approach 1:
The patent optimizes the power supply voltage parameter to achieve a balance between output voltage capability and power consumption. By carefully selecting and adjusting the power supply voltage level, the patent enables the amplifier unit to deliver sufficient output voltage while minimizing overall power consumption of the driver circuit.
Data Source
AI summary
A display apparatus which includes a driver with low power consumption and in which an output voltage of the driver is boosted by a pixel is provided. The source driver in which a logic unit and an amplifier unit operate appropriately by the same low voltage is included, and the pixel has a function of retaining first data, a function of adding second data to the first data to generate third data, and a function of supplying the third data to a display device. Thus, even when a voltage output from the source driver is low, the voltage can be boosted by the pixel; accordingly, the display device can operate appropriately.