Display Device Data Driver Voltage Inversion Control
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while effectively displaying still images, as existing technologies often lead to increased power consumption due to frequent inversion of data voltages, which can deteriorate the display panel.
Innovation Solution
The display device operates in two frequency periods: one for dynamic image display and another for still images, with data voltages inverted every frame or every two frames, and uses storage voltages to maintain pixel voltages during still image periods, reducing power consumption and preventing panel deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data voltages are inverted frequently to maintain display quality, then display uniformity is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic frequency switching between first frequency mode (for moving images requiring frequent inversion every frame) and second frequency mode (for still images allowing less frequent inversion every two frames or longer). The system adaptively adjusts the inversion frequency based on the type of image being displayed, thereby maintaining display uniformity while reducing power consumption during still image periods.
Solution Approach 2:
The patent employs periodic voltage inversion with variable periods - inverting data voltages every frame during first frequency periods for moving images, and extending the inversion period to every two frames or longer during second frequency periods for still images. This periodic action with adaptive timing maintains display quality while optimizing power consumption based on image characteristics.
2Reliability
If data voltages are inverted every frame to prevent panel deterioration, then panel reliability is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the voltage inversion frequency based on image type - using first frequency inversion every frame for moving images to prevent panel deterioration, and switching to second frequency inversion every two frames or longer for still images. This dynamic adaptation maintains panel reliability while significantly reducing power consumption during still image display periods.
Solution Approach 2:
The patent changes the inversion parameter from fixed-frequency (every frame) to variable-frequency (every frame or every two frames or longer) based on image characteristics. By modifying this parameter according to whether the image is moving or still, the system maintains panel reliability through adequate inversion while optimizing power consumption by extending inversion intervals during still image periods.
3Use of energy by moving object
If storage voltage is applied to maintain pixel voltage during still image periods, then power consumption is reduced, but voltage control complexity increases
Solution Approach 1:
The patent segments the display operation into distinct frequency periods - first frequency periods for moving images and second frequency periods for still images. During second frequency periods, storage voltage is applied to maintain pixel voltages without requiring continuous data voltage updates. This segmentation allows the system to reduce power consumption during still image periods while managing voltage control complexity through clear operational phases.
Solution Approach 2:
The system applies storage voltage in advance during second frequency periods to maintain pixel voltages before actual display updates are needed. This preliminary action ensures that pixel voltages remain stable during still image periods without requiring continuous data voltage application, thereby reducing power consumption while managing voltage control through pre-established storage mechanisms.
Data Source
AI summary
A display device is provided. The display device includes a display panel, a gate driver, and a data driver. The display panel includes a plurality of pixels connected to a plurality of gate lines for receiving gate signals, a plurality of data lines for receiving data voltages, and a storage line for receiving a storage voltage. The gate driver is configured to generate the gate signals. The data driver is configured to operate individually in first and second frequency periods to generate the data voltages. The data voltages include a positive data voltage and a negative data voltage, and polarities of the data voltages are inverted every two data lines during the first frequency period and inverted every data line during the second frequency period.