Misaligned Condensing Lenses for Display Panel Brightness
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Solution Overview
Problem
Personal immersion devices, such as VR and AR devices, face challenges in achieving high resolution, high brightness, and low-power driving while minimizing the size of the lens closest to the user's eyes, leading to issues with color and viewing angle characteristics that impair image quality.
Innovation Solution
A display panel design with a substrate featuring a first and second display area, a light emitting layer, a color filter layer, and condensing lenses misaligned with their corresponding emission areas, along with a bank structure and charge generation layer, to enhance light efficiency and reduce lens size, thereby improving image quality and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the lens closest to the user's eyes is decreased to improve the form factor of the personal immersion device, then the device size is reduced, but color and viewing angle characteristics of light emitted from front and side surfaces deteriorate, impairing image quality
Solution Approach 1:
The display area is divided into a first display area (central region) and a second display area (surrounding region), with different optical configurations for each region. The second display area is further segmented into multiple display regions, each with its own condensing lens, allowing optimized light control for different viewing zones while maintaining overall compact device size.
Solution Approach 2:
Different regions of the display have different optical properties and configurations. The condensing lenses are strategically positioned and sized differently for different display regions, with lens size and position optimized for each specific region's viewing requirements, enabling compact overall design while maintaining local image quality.
2Illumination intensity
If conventional display structures are used, then manufacturing is straightforward, but luminous efficiency is insufficient to achieve high brightness
Solution Approach 1:
Condensing lenses are introduced as intermediary optical elements between the light-emitting sub-pixels and the user's eye. These lenses focus and redirect light from the second display area, increasing the amount of light reaching the user's eye and improving luminous efficiency without requiring higher power consumption.
Solution Approach 2:
The optical parameters of the display system are changed by introducing condensing lenses with specific focal lengths, positions, and sizes. The distance between the condensing lens and the corresponding emission area is optimized to concentrate light effectively, transforming the light distribution pattern to achieve higher brightness and luminous efficiency.
3Ease of operation
If condensing lenses are aligned with their corresponding emission areas, then optical alignment is simple, but light direction control is insufficient to optimize viewing characteristics
Solution Approach 1:
The condensing lenses are intentionally misaligned with their corresponding emission areas, creating an asymmetric optical configuration. The central axis of each condensing lens is offset from the central axis of its corresponding emission area, allowing optimized control of light direction and viewing angle characteristics that cannot be achieved with symmetric alignment.
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 effectively increases luminous efficiency, achieves high brightness, and improves image quality by optimizing the display panel's design to better direct light towards the user's eye, while reducing the size of the eyepiece for improved form factor and user experience.
Implementation Method 1
a plurality of condensing lenses disposed on the color filter layer, and a central axis of the condensing lens is misaligned with a central axis of the emission area corresponding to the condensing lens
Data Source
AI summary
A display panel can include a first plurality of sub-pixels disposed on a substrate in a first display area, and a second plurality of sub-pixels disposed on the substrate in a second display area surrounding the first display area, a light emitting layer configured to emit light in each of the first plurality of sub-pixels and the second plurality of sub-pixels, a color filter layer disposed on the light emitting layer, and a plurality of condensing lenses disposed on the color filter layer in the second display area. Also, the plurality of condensing lenses are disposed to correspond one-to-one to emission areas of the second plurality of sub-pixels disposed in the second display area, and a central axis of each of the plurality of condensing lenses in the second display area is misaligned with a central axis of a corresponding emission area among the emission areas.