Display Panel Shift Register Circuit for Variable Refresh Rates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display panels face challenges in efficiently managing power consumption when displaying different content types, such as videos and comments, which require varying refresh rates, leading to increased power usage when maintaining a high refresh rate across the entire panel.
Innovation Solution
A display panel with a shift register circuit that includes cascaded shift units, allowing for different refresh frequencies in adjacent sub-regions of the display panel, with the control circuit providing a non-enabling level to cut off the shift path between unit groups in certain frames, thereby reducing the refresh rate in specific sub-regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the entire display panel maintains a high refresh rate, then the display quality for video content is improved, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple sub-regions (first sub-region, second sub-region, third sub-region) that can operate at different refresh rates simultaneously. The shift register circuit is segmented into corresponding unit groups (first unit group, second unit group, third unit group) that can be independently controlled to output scanning signals at different frequencies, allowing video content to be displayed at high refresh rate while other regions operate at lower rates to reduce power consumption.
Solution Approach 2:
Different sub-regions of the display panel are assigned different refresh rate characteristics based on their specific display needs. The first sub-region displays video content requiring high refresh rates for smooth motion, while the second and third sub-regions display static or less dynamic content at lower refresh rates, optimizing power efficiency while maintaining display quality where needed.
2Use of energy by moving object
If different refresh rates are applied to different sub-regions, then power consumption is reduced, but the control complexity of the shift register circuit increases
Solution Approach 1:
The shift register circuit is divided into multiple independent unit groups, each responsible for driving specific sub-regions. This segmentation allows each unit group to be controlled independently with its own enable signal, simplifying the overall control architecture while enabling different refresh rates in different regions.
Solution Approach 2:
The control circuit uses periodic enable signals to selectively activate different unit groups at different time periods. During certain time periods, all unit groups operate to provide high refresh rates; during other time periods, only specific unit groups are enabled to reduce power consumption, creating a time-multiplexed control scheme that simplifies the control logic.
Data Source
AI summary
A display panel, a driving method thereof, and a display apparatus. The display panel includes a shift register circuit including shift units. The shift unit includes a first output circuit, a control circuit, and a first node. In a first mode, a display region includes a first sub-region refreshed with a first frequency and a second sub-region refreshed with a second frequency. The shift register circuit includes a first unit group and a second unit group. In some frames, the first and second unit groups output an active scanning level, and in some frames, the control circuit in a first shift unit supplies a non-enabling level to the first node at least after the first unit group outputs the active scanning level. The first shift unit is located in the second unit group and is adjacent to the first unit group.