Self-Luminous Display Elements with Optimized Optical Adjustment Layers
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Solution Overview
Problem
Existing image display devices using self-luminous elements, such as organic electroluminescent panels, face challenges in effectively synthesizing and adjusting color images without specific methods for color adjustment, leading to inefficiencies in light emission and display quality.
Innovation Solution
The image display device comprises three self-luminous display elements emitting red, blue, and green light, each with a specific peak wavelength region, and a dichroic prism with dichroic mirrors that intersect at 45 degrees to transmit and reflect light based on wavelength, allowing for precise synthesis of color images. The elements include a support substrate, reflective films, optical adjustment layers, transparent electrodes, and semireflective semitransmissive electrodes, with optimized thicknesses to control light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If organic EL panels with liquid crystal display and dichroic mirrors are used to synthesize color images, then color image display is achieved, but light-extraction efficiency is insufficient and color adjustment is difficult
Solution Approach 1:
The patent applies parameter changes by systematically varying the thickness of optical adjustment layers in the self-luminous display elements to control the wavelength and color of emitted light. By adjusting layer thickness parameters, the invention achieves precise color control and optimizes light extraction efficiency without requiring complex liquid crystal components or dichroic mirrors.
2Adaptability or versatility
If multiple self-luminous display elements with different color peaks are used, then color image synthesis is enabled, but device complexity increases
Solution Approach 1:
The patent merges multiple functional components into integrated self-luminous display elements. Each element combines the light-emitting layer, optical adjustment layers, and electrode structures into a single unified component that directly emits the required color light, eliminating the need for separate liquid crystal displays and dichroic mirror systems.
Solution Approach 2:
The self-luminous display elements serve multiple functions simultaneously: they generate light, control color through optical adjustment layers, and integrate electrode structures for electrical connection. This multi-functionality reduces the overall device complexity while maintaining color image synthesis capability.
3Ease of manufacture
If uniform thickness layers are used in self-luminous display elements, then manufacturing is simplified, but driving voltage uniformity and power consumption control are affected
Solution Approach 1:
The patent applies local quality by using different thickness values for optical adjustment layers in different self-luminous display elements (e.g., first thickness for red element, second thickness for green element, third thickness for blue element). This localized differentiation optimizes each element's performance while maintaining overall device reliability and voltage uniformity.
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 reliable emission of color images with improved light-extraction efficiency and uniform driving voltages across the elements, preventing power consumption increases and short-circuiting, while maintaining high luminous efficiency and accurate absorption of unwanted light.
Implementation Method 1
a prism including a dichroic mirror that synthesizes the first color light, the second color light, and the third color light
Implementation Method 2
a first optical adjustment layer... a second optical adjustment layer... a third optical adjustment layer
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 that synthesizes images of three colors, the first, the second, and the third self-luminous display element are each configured to extract light from a side of a semireflective semitransmissive electrode included in the first, the second, and the third self-luminous display element, and at least one of sums of a thickness of a transparent electrode and a thickness of an optical adjustment layer differs from other in the first, the second, and the third self-luminous display element.