Display Panel Light-Emitting Control Layer for Directional Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) panels for virtual reality (VR)/augmented reality (AR) and transparent displays face challenges with divergent light emission direction control and low transparency due to their structural limitations.
Innovation Solution
A display panel design featuring a light-emitting control layer between substrates, which controls the light-emitting direction and color of subpixel areas to focus light towards the central portion of the panel, eliminating the need for a polarizer and allowing for high-transparency displays by integrating a wave-guide grating coupler that adjusts refractive indices and voltage to manage grayscale and light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional LCD structure is used, then display function is achieved, but light emission direction cannot be controlled and transparency is low
Solution Approach 1:
The display panel is divided into multiple subpixel areas (red, green, blue) within each pixel unit, allowing independent control of light emission direction and color for each subpixel. This segmentation enables precise directional control while maintaining display functionality.
Solution Approach 2:
The patent introduces a light-emitting control layer that operates in a new dimensional space between the substrates, controlling light emission direction through this intermediate layer rather than relying on conventional planar structures. This adds a new degree of freedom for directional control.
2Illumination intensity
If conventional LCD structure is used, then display function is achieved, but transparency is low
Solution Approach 1:
The patent removes the polarizer layer from the conventional LCD structure, extracting this component to achieve higher transparency. By eliminating the polarizer and using the light-emitting control layer to directly control light emission, the display maintains functionality while improving transparency.
Solution Approach 2:
The light-emitting control layer performs multiple functions simultaneously: it controls light emission direction, regulates grayscale, and eliminates the need for separate polarizer and color filter layers. This multi-functionality reduces structural complexity while improving transparency.
3Ease of operation
If light-emitting control layer is added to control light direction and color, then light emission control is improved, but device structure becomes more complex
Solution Approach 1:
The patent merges the functions of light emission direction control, color control, and grayscale regulation into a single light-emitting control layer. This consolidation reduces the number of separate components needed and simplifies the overall structure while maintaining precise control capabilities.
Solution Approach 2:
The light-emitting control layer regulates light emission by changing parameters such as voltage and refractive index, allowing dynamic control of light direction and color without adding complex mechanical or structural components. This parameter-based control simplifies the device structure.
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
This solution enables controlled light emission direction and color, enhancing transparency and light efficiency, enabling near-eye displays, high-resolution VR/AR, and transparent displays without the need for a polarizer or color filter, while maintaining high light efficiency.
Implementation Method 1
integrating a wave-guide grating coupler that adjusts refractive indices and voltage to manage grayscale and light emission
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a lower substrate and an upper substrate cell-assembled together; a light-emitting control layer disposed between the lower substrate and the upper substrate; and a plurality of pixel units defined by a plurality of data lines and gate lines intersected with each other. Each pixel unit includes a plurality of subpixel areas. One or more side surfaces of the lower substrate are configured to receive incidence of the collimated light. The light-emitting control layer is configured to control the light-emitting directions and the light-emitting colors of the subpixel areas, to allow the light-emitting directions of the subpixel areas toward the central portion of the display panel. The light-emitting control layer is also configured to control the display grayscale of the subpixel areas.