Display Gate Driver Voltage Scaling for Lower Power
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Solution Overview
Problem
Liquid crystal display devices consume unnecessary power due to constant voltage supply to the gate electrode of the transistor, leading to inefficient power consumption, while OLED and QLED devices do not require separate backlights but face challenges in power management.
Innovation Solution
A display device with a gate driver that adjusts the gate-on voltage based on luminance, using a low-potential driving voltage, to reduce power consumption while maintaining light emission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a constant voltage is supplied to the gate electrode of the transistor, then the light-emitting element can emit light, but unnecessary power is consumed due to luminance changes
Solution Approach 1:
The gate driver dynamically adjusts the gate-on voltage based on the low-potential driving voltage to match the luminance requirements. Instead of using a fixed constant voltage, the system varies the gate voltage level according to the actual driving conditions, thereby reducing power consumption while ensuring adequate light emission performance across different luminance levels.
Solution Approach 2:
The invention changes the voltage parameter applied to the gate electrode from a constant value to a variable value that depends on the low-potential driving voltage. By adjusting the gate-on voltage parameter according to the actual driving voltage conditions, the system optimizes power consumption while maintaining the necessary light emission performance.
2Loss of energy
If a constant voltage is supplied to the gate electrode, then the transistor can drive the light-emitting element, but power consumption increases without improving light emission performance
Solution Approach 1:
The gate driver implements dynamic voltage adjustment by varying the gate-on voltage according to the low-potential driving voltage levels. This dynamic adaptation ensures that the transistor receives only the necessary voltage to drive the light-emitting element at the required luminance level, eliminating unnecessary power consumption while maintaining adequate light emission performance.
Solution Approach 2:
The system changes the gate voltage parameter from a fixed constant value to a variable parameter that adapts to the low-potential driving voltage. This parameter adjustment optimizes the balance between power consumption and light emission performance by providing higher gate voltage only when higher luminance is required.
Data Source
AI summary
A display device includes: a display panel including pixels, data lines and gate lines; a data driver connected to the data lines; and a gate driver connected to the gate lines, wherein the gate driver is configured to adjust a magnitude of a voltage to be applied to a gate electrode of a transistor of the pixels, based on a low-potential driving voltage of a light-emitting element of the pixels in the display panel.