Dual-Frequency Display Drivers for Low-Power Black-Region Text
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Solution Overview
Problem
Display apparatuses face increased power consumption and circuit area when inserting text information into black regions due to the need for constant operation of gate driver circuits and timing controllers to adjust image signals with different aspect ratios.
Innovation Solution
The display apparatus employs separate driver circuits and signal generation circuits for different image regions, using higher and lower frame frequencies to insert text information into black regions without constant operation of gate driver circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If text information is inserted into black regions using an image generator and timing controller, then text information can be displayed on black regions, but power consumption increases due to constant operation of gate driver circuits and timing controllers
Solution Approach 1:
The display region is divided into an image display region and a black region, with separate driver circuits for each. The gate driver circuit for the black region can operate independently at lower frequency or remain inactive when only text is displayed, reducing overall power consumption while maintaining text display capability in black regions.
Solution Approach 2:
Instead of constant operation, the gate driver circuit for the black region operates periodically or on-demand based on whether text information needs to be displayed. The circuit can be activated only when text insertion is required and deactivated otherwise, reducing power consumption while maintaining the capability to display text in black regions.
2Adaptability or versatility
If separate driver circuits are used for image region and black region, then text information can be inserted into black regions, but circuit area increases
Solution Approach 1:
The gate driver circuit for the black region is designed to serve multiple functions: displaying black levels when no text is present and displaying text information when needed. This multi-functional design eliminates the need for separate dedicated text display circuits, reducing overall circuit area while maintaining text insertion capability.
Solution Approach 2:
The functions of displaying black regions and displaying text information are merged into a single gate driver circuit for the black region. By combining these functions, the patent avoids the need for separate independent circuits, thereby reducing the total circuit area while preserving the ability to insert text into black regions.
Data Source
AI summary
A display apparatus with reduced power consumption is provided. The display apparatus includes a display portion including a first region and a second region, a first driver circuit corresponding to the first region, a second driver circuit corresponding to the second region, a first circuit, a second circuit, a first signal generation circuit, and a second signal generation circuit. The first circuit has a function of generating a first image signal corresponding to a first image, and the second circuit has a function of generating a second image signal corresponding to a second image. The second image contains character information. The first signal generation circuit has a function of generating a clock signal with a first frame frequency, and the second signal generation circuit has a function of generating a clock signal with a second frame frequency lower than the first frame frequency. The display apparatus displays the first image on the first region with the first frame frequency when the first image signal is transmitted to the first driver circuit, and displays the second image on the second region with the second frame frequency when the second image signal is transmitted to the second driver circuit.