Virtual Pixel Circuit Layout for High Transmittance Display
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Solution Overview
Problem
The increasing screen-to-body ratio in display products, such as smartphones, is hindered by the need to accommodate front cameras, sensors, and other components, which obstruct full screen designs.
Innovation Solution
A display panel design that includes a base substrate with a display area and a peripheral area, featuring virtual and drive pixel circuits, and light emitting devices. The virtual pixel circuits in the peripheral area drive the first light emitting devices in the display area, while drive pixel circuits in the display area drive the second light emitting devices, enabling a light-emitting display effect without the need for pixel circuits or metal traces in the first display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pixel circuits and metal traces are placed in the entire display area to drive light emitting devices, then the display function is ensured, but the light transmittance in the display area is reduced and the screen-to-body ratio is limited
Solution Approach 1:
The patent divides the display panel into two distinct regions: a first display area without pixel circuits where light emitting devices are directly driven, and a second display area with conventional pixel circuits. This segmentation allows the first display area to achieve high light transmittance while the second display area ensures reliable display function through traditional pixel circuit control.
Solution Approach 2:
The patent moves the pixel circuits from the display area to the peripheral area, utilizing the spatial dimension outside the active display region. Virtual pixel circuits in the peripheral area electrically connect to and drive light emitting devices in the first display area through extending traces, effectively relocating the control function to another spatial dimension.
2Area of stationary object
If the peripheral area is reduced to increase the display area, then the screen-to-body ratio is improved, but the space for arranging virtual pixel circuits and connecting traces is insufficient
Solution Approach 1:
The patent employs asymmetric expansion of the peripheral area in specific directions, extending further in directions that do not compromise the display area. This asymmetric layout optimizes the arrangement of virtual pixel circuits and connecting traces, providing sufficient space for electrical connections while maximizing the display area.
Solution Approach 2:
The patent utilizes the peripheral area as an extended dimension for housing virtual pixel circuits that control the first display area. By placing these circuits in the peripheral region and using extending connecting traces, the patent effectively uses the peripheral dimension to support the enlarged display area without compromising functionality.
3Illumination intensity
If virtual pixel circuits are arranged in the peripheral area to drive light emitting devices in the display area, then light transmittance is enhanced, but the electrical connection distance increases
Solution Approach 1:
The patent performs preliminary action by extending the connecting traces from the virtual pixel circuits in the peripheral area toward the first display area during the manufacturing process. This pre-extension ensures that the traces are properly positioned and connected before the light emitting devices are activated, minimizing the effective connection distance and ensuring reliable electrical contact.
Solution Approach 2:
The extending connecting traces act as intermediaries that bridge the gap between the virtual pixel circuits in the peripheral area and the light emitting devices in the first display area. These traces serve as the electrical mediator that transfers control signals over the necessary distance while maintaining signal integrity.
Data Source
AI summary
Disclosed in the embodiments of the present disclosure are a display panel and a display device. The display panel includes: a display area and a peripheral area surrounding the display area, the display area includes a first display area and a second display area; a plurality of virtual pixel circuits and a plurality of drive pixel circuits, the plurality of virtual pixel circuits are arranged in the peripheral area, and the plurality of drive pixel circuits are arranged in the second display area; the plurality of first light emitting devices are arranged in the first display area, and the plurality of second light emitting devices are arranged in the second display area; the virtual pixel circuit is electrically connected with the first light emitting device, and the drive pixel circuit is electrically connected with the second light emitting device.