Under-screen Display Panel with Time-Division Gating Circuit
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Solution Overview
Problem
In the field of display technologies, the 'full screen' trend is hindered by special-shaped displays with notch regions, where sensors like cameras are placed, reducing the screen-to-body ratio since the notch region cannot display, thus limiting the resolution and image quality in those areas.
Innovation Solution
A display panel design with a substrate, light-emitting devices, and pixel circuits, where the gating circuit connects multiple light-emitting devices to pixel circuits in a time-division manner, allowing for higher transmittance in the display region and improved resolution by placing pixel circuits in peripheral regions, thus enhancing the screen-to-body ratio without obstructing the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If special-shaped display screens with notch regions are used to arrange sensors, then the sensor function is achieved, but the screen-to-body ratio is reduced because the notch region cannot display
Solution Approach 1:
The patent implements under-screen display technology where light-emitting devices are positioned beneath the display screen surface, allowing the sensor to be nested within the display structure. This enables both sensing and display functions to coexist in the same physical space, eliminating the need for separate notch regions and thereby improving the screen-to-body ratio while maintaining sensor functionality.
2Ease of operation
If pixel circuits are placed in the display region to drive light-emitting devices, then the display function is achieved, but the transmittance of the display region is reduced
Solution Approach 1:
The patent relocates pixel circuits from the two-dimensional display plane to the third dimension by positioning them in peripheral regions surrounding the display area. This spatial reconfiguration allows the display region to remain optically transparent while pixel circuits are functionally connected through extended signal lines, thus maintaining both high transmittance and full display functionality.
3Measurement precision
If multiple pixel circuits are used to drive light-emitting devices in the display region, then the resolution is improved, but the device complexity increases
Solution Approach 1:
The patent implements a gating circuit mechanism that merges multiple light-emitting devices into groups, where each group is controlled by a single pixel circuit through time-division multiplexing. This consolidation reduces the total number of pixel circuits required while maintaining the ability to independently control individual light-emitting devices, thereby achieving high resolution without proportionally increasing circuit complexity.
Data Source
AI summary
A display panel has a first display region, a second display region, a first peripheral region and a second peripheral region. The first peripheral region is located outside the first display region, the second peripheral region is located outside the second display region, and a transmittance of the first display region is greater than a transmittance of the second display region. The display panel includes a substrate, light-emitting devices disposed on the substrate and located in the first display region, first pixel circuits disposed on the substrate and located in the first peripheral region, and a gating circuit disposed on the substrate and coupled to the light-emitting devices and the first pixel circuits. The gating circuit is configured to connect each first pixel circuit to at least two light-emitting devices in a time-division manner to drive the light-emitting devices connected to the first pixel circuit to emit light.