Display Panel Driving Chip Adjusting Negative Power Voltage
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Solution Overview
Problem
Current display panels consume excessive power due to the use of a constant negative power voltage signal, even in low brightness modes, which is unnecessary and increases power consumption.
Innovation Solution
A driving method and chip that adjust the negative power voltage signal based on pre-stored Gamma curves corresponding to different display modes, monitoring the current mode to output the appropriate signal, thereby reducing power consumption and improving image perception in line with human eye perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a constant negative power voltage signal corresponding to maximum brightness is provided to the display panel, then the display panel can display at maximum brightness, but power consumption increases when displaying at lower brightness levels
Solution Approach 1:
The patent applies dynamics by making the negative power voltage signal adjustable rather than fixed. The driving chip dynamically changes the negative power voltage signal based on the current display mode and Gamma curve, allowing the voltage to adapt to different brightness requirements. This resolves the contradiction by enabling the display panel to operate at appropriate voltage levels for each brightness condition, reducing power consumption when maximum brightness is not needed.
Solution Approach 2:
The patent changes the voltage parameter of the negative power voltage signal based on different display modes. By storing multiple Gamma curves corresponding to different display modes and selecting the appropriate curve, the system adjusts the voltage parameter to match the required brightness level. This parameter adaptation allows the display panel to consume less power when operating at lower brightness levels while maintaining the ability to display at maximum brightness when needed.
2Device complexity
If a constant negative power voltage signal is used regardless of display mode, then the circuit design is simple, but the displayed image does not match human eye perception in different brightness conditions
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple Gamma curves in the driving chip that correspond to different display modes. These curves are prepared in advance based on human eye perception characteristics for different brightness conditions. When a display mode is detected, the corresponding pre-prepared Gamma curve is selected and applied, enabling accurate image display that matches human perception without requiring complex real-time calculations or adjustments.
Data Source
AI summary
A driving method for a display panel, a driving chip, and a display device are provided. The method includes: pre-storing Gamma curves corresponding to different display modes of the display panel; monitoring a display mode of the display panel when an image is displayed by the display panel, and acquiring a negative power voltage signal corresponding to the display mode; acquiring a Gamma curve corresponding to the display mode from the pre-stored Gamma curves based on the monitored display mode; outputting the negative power voltage signal to the display panel; and correcting the image displayed by the display panel according to the acquired Gamma curve. The above driving method is configured to drive the image displayed by the display panel.