Display Device Gate-On Voltage Control for Luminance and Power
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Solution Overview
Problem
Display devices face a challenge in achieving high luminance while minimizing increases in average power consumption, as increasing the driving current to enhance luminance also increases power consumption.
Innovation Solution
A display device design that includes a controller to calculate load, a data driver to generate data signals, a gate driver to generate gate signals, and a power supply to vary the gate-on voltage based on load, allowing for increased luminance while maintaining low power consumption by adjusting the gate-on voltage levels and reference voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the driving current flowing through the light emitting element is increased to enhance luminance, then the luminance is improved, but the power consumption is increased
Solution Approach 1:
The gate-on voltage is made dynamic and adjustable based on the load condition. The power supply unit varies the gate-on voltage according to the calculated load, allowing the display device to adapt its power consumption characteristics to the actual display requirements, thereby resolving the contradiction between maintaining high luminance and minimizing power consumption
Solution Approach 2:
The patent changes the electrical parameter (gate-on voltage) to optimize the balance between luminance and power consumption. By adjusting the gate-on voltage based on load conditions, the system achieves high luminance when needed while minimizing power consumption during normal operation, effectively resolving the technical contradiction
2Illumination intensity
If a constant high gate-on voltage is applied to maintain high luminance, then the luminance is improved, but the average power consumption is increased
Solution Approach 1:
The gate-on voltage transitions from a constant value to a dynamic variable that adjusts according to load conditions. The power supply unit calculates the load and varies the gate-on voltage accordingly, enabling the system to maintain high luminance only when necessary while reducing average power consumption during normal operation
Solution Approach 2:
Instead of applying a constant high gate-on voltage at all times, the system applies a high gate-on voltage only partially - specifically when the load condition requires high luminance. This partial action approach maintains the necessary performance while minimizing unnecessary power consumption
Data Source
AI summary
A display device includes: a display including a gate line, a data line, and a pixel electrically coupled to the gate line and the data line; a controller configured to calculate a load of input data; a data driver configured to: generate a data signal corresponding to a grayscale value in the input data; and provide the data signal to the data line; a gate driver configured to: generate a gate signal having a pulse, based on a gate-on voltage; and provide the gate signal to the gate line; and a power supply configured to: provide the gate-on voltage to the gate driver; and vary the gate-on voltage based on the load, wherein the gate-on voltage has a voltage level for turning on the first transistor, and wherein a luminance of the display is increased as the load is increased.