Power Selection Circuit for OLED Split-Screen Refresh Control
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Solution Overview
Problem
Current OLED display products face challenges in operational performance, particularly during split-screen displays where different refresh frequencies cannot be effectively utilized for driving various regions.
Innovation Solution
A power selection circuit is introduced, featuring a voltage signal line that transmits signals to a first electrode of a light-emitting sub-pixel, allowing for independent light-emitting control of each group of sub-pixels. This enables row-by-row or group-by-group lighting by controlling time intervals for voltage signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single voltage signal line is used to drive all light-emitting sub-pixels simultaneously, then the circuit structure is simple, but different regions cannot be driven at different refresh frequencies during split-screen display
Solution Approach 1:
The patent divides the display panel into multiple groups of light-emitting sub-pixels (first group and second group), each group capable of being driven independently at different refresh frequencies. This segmentation allows different regions to operate at different refresh rates, enabling split-screen display with varying refresh frequencies while maintaining a relatively simple overall circuit structure.
Solution Approach 2:
The patent introduces controllable switching elements (such as transistors) that can dynamically adjust the connection state between voltage signal lines and different groups of light-emitting sub-pixels. This dynamic control enables the system to adaptively switch between different driving modes (simultaneous driving, sequential driving, or independent driving at different frequencies) based on display requirements.
2Ease of operation
If all light-emitting sub-pixels are controlled to emit light simultaneously, then the control circuit is simple, but row-by-row or group-by-group lighting control cannot be achieved
Solution Approach 1:
The patent divides the light-emitting sub-pixels into multiple independently controllable groups, where each group can be controlled to emit light separately. This segmentation enables precise control over which groups are illuminated at any given time, achieving row-by-row or group-by-group lighting effects while maintaining manageable control circuit complexity through systematic grouping.
Solution Approach 2:
The patent implements preliminary control by using scanning signal lines to sequentially select and activate different groups of light-emitting sub-pixels before the actual light emission occurs. This preliminary selection mechanism allows the control circuit to prepare and manage which groups will be illuminated next, enabling precise timing and sequencing of light emission across different groups.
3Adaptability or versatility
If multiple voltage signal lines are introduced to enable independent control of different sub-pixel groups, then group-by-group lighting control is achieved, but the circuit complexity increases
Solution Approach 1:
The patent designs voltage signal lines that can serve multiple functions: they can simultaneously drive different groups of light-emitting sub-pixels at different refresh frequencies, provide power supply, and enable various lighting modes (simultaneous, sequential, or independent driving). This multi-functionality reduces the need for entirely separate circuit paths for each control mode, thereby limiting the increase in overall circuit complexity while maintaining high adaptability.
Solution Approach 2:
The patent employs dynamic switching mechanisms that allow the same voltage signal lines to be dynamically assigned to different groups of light-emitting sub-pixels based on display requirements. This dynamic allocation enables the system to achieve multiple lighting modes and different refresh frequency configurations using a limited set of voltage signal lines, thereby controlling circuit complexity while maintaining versatility.
Data Source
AI summary
A power selection circuit, a display panel, and a display apparatus. The power selection circuit includes a voltage signal line, the voltage signal line being configured to transmit a voltage signal to a first electrode of a light-emitting sub-pixel, and control at least two groups of light-emitting sub-pixels to emit light group by group. One group of light-emitting sub-pixels includes at least one row of light-emitting sub-pixels or at least one row of light-emitting sub-pixel units, and one of the light-emitting sub-pixel units includes at least two different light-emitting sub-pixels. Independent light-emitting control over each group of light-emitting sub-pixels can be realized, thereby realizing row-by-row lighting or group-by-group lighting of respective rows of light-emitting sub-pixels.