Reflective VR Display Panel With Pixel-Level Light Collimation
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Solution Overview
Problem
Conventional reflective display apparatuses, such as reflective liquid crystal displays, struggle to provide uniform light emission angles for all pixel regions, leading to suboptimal user experiences, particularly in virtual reality devices where human eyes have difficulty receiving light from all pixel regions.
Innovation Solution
Incorporating optical structure units, specifically condenser lenses, within the reflective display panel to process light emitted from light-emitting elements and reflect it back as collimated light, ensuring uniform light emission angles across all pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional reflective display apparatuses are used without optical structure units, then the device complexity is low, but the light emission angles are non-uniform across pixel regions
Solution Approach 1:
The display panel is segmented into multiple pixel regions, with each region equipped with its own optical structure unit (condenser lens). This segmentation allows independent control and optimization of light emission angles for each pixel region, ensuring uniformity across the entire display while maintaining manageable complexity through modular design
Solution Approach 2:
Optical structure units (condenser lenses) are introduced as intermediary components between the light-emitting elements and the external environment. These intermediaries process and collimate the light emitted by each pixel region, transforming divergent light into parallel beams with uniform emission angles, thereby resolving the non-uniformity issue without requiring fundamental changes to the display architecture
2Manufacturing precision
If optical structure units are added to process light for each pixel region, then light emission angle uniformity is improved, but the manufacturing complexity increases
Solution Approach 1:
By dividing the display into pixel regions with individual optical structure units, the manufacturing process can be standardized and modularized. Each optical structure unit can be pre-fabricated and tested independently, then assembled into the display panel in a systematic manner, making the increased complexity manageable through standardized procedures
Solution Approach 2:
The invention optimizes specific parameters of the optical structure units, such as the focal length of condenser lenses and their positioning relative to light-emitting elements. By carefully controlling these parameters (e.g., focal length matched to pixel pitch, precise positioning within micrometers), the system achieves uniform light emission angles while maintaining manufacturing feasibility through parameter standardization
3Adaptability or versatility
If light is emitted at different angles from different pixel regions, then the display can cover a wide viewing area, but human eyes cannot receive light uniformly in virtual reality applications
Solution Approach 1:
The optical structure units dynamically adapt light emission based on the specific requirements of virtual reality display. By collimating light into parallel beams with controlled emission angles, the system ensures that light from all pixel regions converges reliably at the user's eye position, maintaining high light reception reliability while preserving wide viewing area coverage through uniform angular distribution
Solution Approach 2:
The invention changes the emission angle parameter from variable across pixel regions to a controlled, uniform value. By adjusting and standardizing the emission angle parameter through optical collimation, the system ensures that light from all pixel regions reaches the user's eye with consistent intensity and angle, thereby improving reliability for virtual reality applications while maintaining adaptability to different viewing conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures that all pixels emit light at substantially the same angle, improving user experience in virtual reality devices by allowing human eyes to receive light from all pixel regions uniformly.
Implementation Method 1
the optical structure unit is configured to process first light emitted from the light-emitting element to produce second light; and the second light is reflected by the reflective layer back to the optical structure unit, and the second light is processed by the optical structure unit into collimated light
Implementation Method 2
the second light is reflected by the reflective layer back to the optical structure unit
Data Source
AI summary
The present disclosure provides a display apparatus, including a first substrate, and a reflective layer, a plurality of optical structure units, and a plurality of light-emitting elements, which are sequentially arranged in a direction away from the first substrate. An orthographic projection of each optical structure unit on the first substrate covers an orthographic projection of at least one light-emitting element on the first substrate, and each optical structure unit is configured to process first light emitted from the light-emitting elements to produce second light. The second light is reflected by the reflective layer back to the optical structure unit, and the second light is processed by the optical structure unit into collimated light emitted away from the first substrate. The present disclosure further provides a virtual reality device.