Display Device Charge Pump for Lower Gate Driver Power
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption, particularly in generating efficient gate low voltages for gate drivers and emission drivers, which are crucial for sub-pixel operations.
Innovation Solution
A display device design incorporating a power voltage generator that utilizes a charge pump circuit to generate a second gate low voltage by subtracting a second input voltage from a first input voltage, along with a gate driver receiving a first input voltage as a first gate low voltage and providing gate signals to sub-pixels, and an emission driver receiving both input voltages to generate emission signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power voltage generator generates gate low voltage for the gate driver, then the gate driver can operate to control sub-pixels, but the power consumption increases due to voltage generation requirements
Solution Approach 1:
The patent applies parameter changes by generating a second gate low voltage with a higher absolute value than the first gate low voltage. This voltage parameter modification allows the power voltage generator to operate more efficiently while maintaining proper gate driver functionality, thereby reducing overall power consumption without compromising reliability
Solution Approach 2:
The power voltage generator acts as an intermediary component that receives input voltages and generates the required gate low voltage. By introducing this intermediate voltage generation stage with optimized parameters, the system achieves efficient gate driver operation while managing power consumption through controlled voltage transformation
2Use of energy by moving object
If the power voltage generator generates a second gate low voltage with higher absolute value, then power consumption is reduced, but the device complexity increases due to additional voltage generation circuitry
Solution Approach 1:
The power voltage generator is designed with multi-functionality, serving both the gate driver and emission driver voltage requirements. By making this single component serve multiple purposes, the patent reduces the need for separate dedicated voltage generation circuits, thereby managing device complexity while achieving power consumption reduction through the second gate low voltage generation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption by generating a second gate low voltage with a higher absolute value than the first, allowing for efficient operation of gate and emission drivers while minimizing power usage.
Implementation Method 1
a charge pump circuit configured to generate the second gate low voltage based on the first input voltage and the second input voltage
Data Source
AI summary
A display device includes a display panel including sub-pixels, a data driver, a gate driver, and a power voltage generator. The data driver provides data voltages to the sub-pixels. The gate driver receives a first input voltage as a first gate low voltage and provides gate signals to the sub-pixels. The power voltage generator receives the first input voltage and a second input voltage, generates a second gate low voltage based on the first input voltage and the second input voltage, and provides the second gate low voltage to the gate driver. The display device may also include a driving controller for controlling the data driver, the gate driver, and the power voltage generator.