Pixel Voltage-Boost Circuit for Low-Power Display Driving
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Solution Overview
Problem
Display apparatuses face challenges in reducing power consumption, particularly in the source driver's amplifier unit, which requires high power supply voltage, and need to operate efficiently with low input data voltages while maintaining image luminance and reliability.
Innovation Solution
A display apparatus design incorporating an inverter circuit and pixel structure that inverts and adds data, using transistors with metal oxide channels to generate higher voltages, reducing the power supply voltage requirements and enabling low-cost fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the amplifier unit uses high power supply voltage to achieve high output voltage and withstand voltage, then the output voltage capability is improved, but the power consumption increases
Solution Approach 1:
The patent introduces an inverter circuit that inverts the input data signal to generate complementary signals. This inversion approach enables the pixel circuit to perform voltage addition through capacitive coupling, allowing the output voltage to be doubled without increasing the power supply voltage, thereby reducing power consumption while maintaining high output voltage capability
Solution Approach 2:
The patent changes the voltage parameter by using capacitive coupling to add voltages. The pixel circuit combines the original data signal with its inverted version through capacitor connections, transforming the voltage level from V to 2V without requiring the power supply voltage to be increased, thus achieving high output voltage with low power consumption
2Power
If the source driver uses separate technology for amplifier unit and logic unit to meet different voltage requirements, then the voltage requirement is satisfied, but the manufacturing cost increases
Solution Approach 1:
The patent makes the power supply system universal by designing the pixel circuit to operate with a single low-voltage power supply. The inverter circuit and capacitive coupling mechanism enable both the amplifier unit and logic unit to function with the same voltage level, allowing common fabrication technology to be used for both units, thereby reducing manufacturing cost while satisfying different voltage requirements
3Use of energy by moving object
If the display apparatus operates with low input data voltage to reduce power consumption, then the power consumption is reduced, but the image luminance decreases
Solution Approach 1:
The patent changes the voltage parameter through capacitive voltage addition. The pixel circuit combines the input data voltage with the inverted data voltage via capacitive coupling, effectively doubling the output voltage from V to 2V. This voltage multiplication maintains high image luminance while the system operates with low power supply voltage, thereby reducing power consumption
Data Source
AI summary
A display apparatus with low-power consumption is provided. The display apparatus includes an inverter circuit and a pixel having a function of adding data, and the inverter circuit has a function of inverting data supplied from a source driver. The inverter circuit has a function of inverting data supplied from a source driver. The pixel has a function of adding data supplied from the source driver and the inverter circuit. Accordingly, the pixel can generate a voltage several times higher than the output voltage of the source driver and can supply the voltage to a display device. With such a structure, the output voltage of the source driver can be lowered, so that a display apparatus with low power consumption can be achieved.