Self-Luminous Display Device with Dichroic Mirror Color Synthesis
Solution Overview
Problem
Existing image display devices using self-luminous elements, such as organic electroluminescent panels, lack an effective method for adjusting and synthesizing red, green, and blue color images, leading to inefficiencies in color reproduction.
Innovation Solution
The image display device incorporates three self-luminous display elements with specific peak emission wavelengths for red, green, and blue colors, each with a support substrate, reflective film, and light-emitting layer, utilizing dichroic mirrors and coloring layers to selectively transmit and reflect light, optimizing the optical path lengths to synthesize full-color images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic EL panels with microresonators are used to emit red, green, and blue colors, then color image display is enabled, but the method for adjusting and synthesizing colors is not provided, leading to inefficiency in color reproduction
Solution Approach 1:
The patent adjusts the film thickness of the light-emitting layer in the organic EL panels to control the peak emission wavelengths of red, green, and blue colors. By changing the film thickness parameter, the optical path length is optimized, enabling effective color synthesis through the dichroic mirrors without requiring complex additional adjustment mechanisms.
2Manufacturing precision
If three self-luminous display elements are used with dichroic mirrors to synthesize colors, then color image reproduction is improved, but the substrate configurations must be maintained identical, increasing manufacturing complexity
Solution Approach 1:
The patent employs identical substrate configurations for all three self-luminous display elements (red, green, and blue panels). The same substrate structure, including support substrate, reflective film, light-emitting layer, and semireflective semitransmissive electrode, serves multiple functions: providing mechanical support, optical reflection, light emission, and color filtering. This universal design simplifies manufacturing while achieving effective color synthesis.
3Productivity
If the light-emitting layer film thickness is optimized for each color, then color synthesis efficiency is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent optimizes the film thickness of the light-emitting layer for each color (red, green, blue) to control the peak emission wavelengths and optimize optical path lengths. Despite the different thickness values required for each color, the patent maintains a standardized substrate configuration that can accommodate these variations, thereby achieving efficient color synthesis without proportionally increasing manufacturing complexity.
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 configuration enables efficient synthesis of red, green, and blue light, resulting in improved color image reproduction and simplifies the manufacturing process by maintaining identical substrate configurations across panels.
Implementation Method 1
a prism including a dichroic mirror that synthesizes three colors of the first color light emitted from the first self-luminous display element, the second color light emitted from the second self-luminous display element, and the third color light emitted from the third self-luminous display element
Implementation Method 2
each include a support substrate, a reflective film, a light-emitting layer, and a semireflective semitransmissive electrode
Implementation Method 3
a first self-luminous display element that emits by itself an image of first color light having a peak in a first color region
Data Source
AI summary
An image display device according to the present disclosure includes a first self-luminous display element that self-emits an image of first color light, a second self-luminous display element that self-emits an image of second color light, a third self-luminous display element that self-emits an image of third color light, and a prism including a dichroic mirror; the first self-luminous display element includes a first functional layer and a first substrate portion, the second self-luminous display element includes a second functional layer and a second substrate portion, and the third self-luminous display element includes a third functional layer and a third substrate portion; the first, the second, and the third substrate portion have an identical configuration in the thickness directions thereof; and the first, the second, and the third functional layer have a mutually different film thickness.