Display Panel With Integrated Mirror And Waveguide Pixels
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Solution Overview
Problem
Existing display panels require separate specially coated films to achieve both display and mirror functions, increasing manufacturing costs and process expenses.
Innovation Solution
A display panel design incorporating a substrate with pixels that include a first area for a waveguide display device, a second area with a reflective member to extract light, and a third area with a reflective member for mirror functionality, utilizing reflective electrodes and organic emission layers to manage light without a separate film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate specially coated film is used to realize mirror function, then the mirror function is achieved, but manufacturing costs and process expenses increase
Solution Approach 1:
The patent merges the mirror function with the display panel structure by utilizing the existing second electrode as a reflective member. This integration eliminates the need for a separate specially coated film, thereby achieving the mirror function while reducing manufacturing costs and process complexity.
Solution Approach 2:
The second electrode is designed to serve multiple functions: it acts as an electrode for light emission and simultaneously functions as a reflective member for the mirror effect. This multi-functionality reduces the number of separate components needed, lowering manufacturing costs while maintaining the mirror function.
2Reliability
If a separate specially coated film is used to realize mirror function, then the mirror function is achieved, but process expenses increase
Solution Approach 1:
The mirror function is merged into the existing display panel structure by using the second electrode as a reflective member. This eliminates the need for a separate film deposition process, thereby reducing process complexity while maintaining the mirror function.
Solution Approach 2:
The patent extracts the mirror function from the concept of a separate specially coated film and integrates it into the existing electrode structure. This extraction eliminates the need for additional manufacturing processes while preserving the desired mirror effect.
3Reliability
If light is transmitted parallel to the substrate in the first area, then the display function is achieved, but light extraction efficiency may be reduced
Solution Approach 1:
The pixel structure is segmented into different functional areas: the first area for waveguide light transmission parallel to the substrate, the second area for light extraction with reflective members at an angle, and the third area for mirror function. This segmentation allows each area to optimize its specific function, maintaining display performance while improving light extraction efficiency in the second area.
Solution Approach 2:
Different regions of the pixel are assigned different optical properties: the first area has waveguide characteristics for parallel light transmission, while the second area has reflective characteristics for efficient light extraction. This local differentiation of optical properties ensures that display function and light extraction efficiency are both optimized in their respective regions.
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
Enables efficient realization of both display and mirror functions without additional films, reducing costs and process complexity while maintaining effective light extraction and reflection capabilities.
Implementation Method 1
a display device including a first electrode, a second electrode, and an organic emission layer
Implementation Method 2
a first reflective member to extract the produced and transmitted light to an outside of the display panel by reflecting the produced and transmitted light
Implementation Method 3
a first area including a display device having a waveguide function to produce light and to transmit the produced light in a direction parallel to the substrate
Data Source
AI summary
A display panel that includes a plurality of pixels, each pixel includes a first area including a display device; a second area including a first reflective member to reflect light received from the display device to an outside of the display panel for viewing, and a third area including a second reflective member reflecting external light to provide a mirror function when the display device is not displaying an image. The display device includes a pair of reflective electrodes to cause the light produced by the display device to propagate towards the second area. One of the two electrodes may further include a transparent conductive material to provide a waveguide function to the display device in the first area to improve coupling efficiency of the display panel.