Display Substrate Recess Structure for Under-Display Camera Integration
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Solution Overview
Problem
Existing display technologies face challenges in achieving a high screen-to-body ratio while ensuring proper light transmittance and display effect at the position corresponding to the imaging module in display substrates.
Innovation Solution
A display substrate design featuring a first display region and a second display region, with a first base substrate, a second base substrate, and a light emitting unit, where the second base substrate has a recessed portion to accommodate the imaging module, enhancing light transmittance and maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a full screen design is adopted to increase screen-to-body ratio, then the screen-to-body ratio is improved, but the mechanical sealing performance deteriorates due to camera placement issues
Solution Approach 1:
The imaging module is nested within a recessed portion of the base substrate, allowing the camera to be positioned under the display screen while maintaining proper sealing. The recessed structure enables the imaging module to be embedded in the substrate thickness direction, achieving both full screen coverage and reliable mechanical sealing.
Solution Approach 2:
The solution transitions from a planar camera placement to a three-dimensional recessed structure. By creating a recessed portion in the base substrate, the imaging module is positioned in the thickness direction rather than on the surface, enabling full screen design while maintaining sealing integrity through vertical dimension utilization.
2Volume of stationary object
If the base substrate thickness is increased to accommodate the imaging module, then the imaging module can be properly housed, but the light transmittance deteriorates
Solution Approach 1:
The base substrate exhibits different thickness characteristics in different regions: a thicker first region accommodates the imaging module while a thinner second region maintains high light transmittance for display. This local variation in thickness allows simultaneous satisfaction of both imaging module accommodation and light transmission requirements.
Solution Approach 2:
The base substrate is divided into functional regions with different thicknesses - a first region with greater thickness for imaging module housing and a second region with smaller thickness for optimal light transmission. This segmentation allows each region to be optimized for its specific function without compromising the other.
3Illumination intensity
If a recessed portion is created in the base substrate to improve light transmittance, then the light transmittance is improved, but the structural strength deteriorates
Solution Approach 1:
A reinforcement layer with different material properties than the base substrate is introduced to compensate for the strength loss caused by the recessed portion. The reinforcement layer, positioned in the first region, provides additional structural support while allowing the recessed geometry to maintain high light transmittance in the second region.
Solution Approach 2:
The reinforcement layer acts as a counterbalancing element that compensates for the structural weakness introduced by the recessed portion. By adding this reinforcing structure in the first region, the overall structural strength is maintained despite the material removal necessary for light transmission optimization in the second region.
Data Source
AI summary
A display substrate includes a first display region and a second display region. The display substrate may include: a first base substrate; a second base substrate; a first barrier layer and a light emitting unit. The first base substrate includes a first through region penetrating the first base substrate, and the first barrier layer includes a second through region penetrating the first barrier layer. The second base substrate includes a first substrate sub-portion located in the first display region, the first substrate sub-portion penetrates the second through region, and at least a portion of the first substrate sub-portion is located in the first through region. The display substrate includes a recessed portion. The second base substrate includes a first surface located in the first display region and a second surface located in the second display region, and the first surface and the second surface are formed as a flat surface.