Display Timing Controller Adaptive Drive Frequency
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Solution Overview
Problem
Current display devices, such as LCDs and OLEDs, consume excessive power due to constant driving modes regardless of image types, leading to inefficiencies in power usage.
Innovation Solution
A display device with a timing controller that adjusts its driving mode based on image signal differences and complexity, allowing for dot inversion, column inversion, frame inversion, and frequency changes to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display panel operates at a fixed drive frequency regardless of image type, then the driving control is simple, but power consumption increases due to unnecessary voltage transitions
Solution Approach 1:
The patent applies dynamics by making the drive frequency variable rather than fixed. The timing controller dynamically adjusts the drive frequency based on image characteristics (still images vs. moving images) and inversion driving modes, transforming the static driving system into an adaptive one that optimizes power consumption while maintaining simple control architecture
Solution Approach 2:
The patent changes the drive frequency parameter according to different operating conditions. For still images, it uses a first drive frequency, and for moving images, it switches to a second drive frequency higher than the first. This parameter adjustment resolves the contradiction by reducing power consumption during static display while maintaining responsiveness for dynamic content
2Speed
If the display panel always operates at a high drive frequency, then the response speed is fast, but power consumption increases due to constant voltage transitions
Solution Approach 1:
The patent implements periodic action by alternating between different drive frequencies based on image content. The system periodically evaluates image characteristics and adjusts the drive frequency accordingly, using a lower frequency for still images to reduce power consumption and switching to a higher frequency when image changes are detected, thus balancing speed and energy efficiency
Solution Approach 2:
The patent makes the drive frequency dynamic rather than static. The timing controller continuously monitors image characteristics and adjusts the drive frequency in real-time, allowing the system to maintain high response speed when needed while reducing power consumption during static display periods
3Device complexity
If the display panel uses a single inversion driving mode, then the driving control is simple, but power consumption increases due to unnecessary voltage transitions
Solution Approach 1:
The patent applies dynamics by making the inversion driving mode variable. The timing controller dynamically selects between dot inversion, line inversion, and frame inversion modes based on image characteristics, transforming the static driving system into an adaptive one that optimizes power consumption while maintaining simple control architecture
Solution Approach 2:
The patent changes the inversion driving mode parameter according to different image types. For still images, it selects modes with fewer voltage transitions, while for moving images, it chooses modes that maintain image quality. This parameter adjustment resolves the contradiction by reducing power consumption during static display while maintaining driving simplicity
Data Source
AI summary
A display device and a method of driving the same. The display device includes a display panel on which a plurality of data lines and a plurality of gate lines intersect each other to form a matrix, with a number of pixels being defined at intersections of the plurality of data lines and the plurality of gate lines. A data driver is connected to the plurality of data lines. A gate driver is connected to the plurality of gate lines. A timing controller controls the display panel to operate in a driving mode that changes depending on image signals.