OLED Display Band-Pass Filter for Ambient Light Damage
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Solution Overview
Problem
Outdoor OLED displays face issues of high power consumption, low contrast, and shortened operation life due to ambient light causing premature deterioration of organic materials.
Innovation Solution
Incorporating a band-pass filter device with red, green, and blue light band-pass filter films between the OLED device and the encapsulation layer, and a circular polarizer to filter out non-essential light components, while using alternately stacked inorganic and organic layers in the encapsulation layer to enhance protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If OLED displays operate in outdoor environments with high brightness requirements, then the display brightness is improved, but the operation life is shortened due to ambient light damaging the organic material
Solution Approach 1:
A band-pass filter device is introduced as an intermediary component between the OLED device and the ambient environment. This filter selectively transmits visible light wavelengths (400-700nm) while blocking harmful high-energy components, thereby mediating the interaction between ambient light and the organic light-emitting material to prevent damage while maintaining display brightness
Solution Approach 2:
The patent changes the spectral parameters of transmitted light by using a band-pass filter that only allows specific wavelength ranges (400-700nm) to pass through. This parameter modification ensures that harmful high-energy components are blocked while beneficial visible light components are transmitted, resolving the contradiction between brightness and operation life
2Duration of action of stationary object
If the band-pass filter device is disposed between the OLED device and the encapsulation layer, then the operation life is extended by filtering ambient light, but the device complexity increases
Solution Approach 1:
The band-pass filter device is merged with the encapsulation layer structure, where the filter is integrated between the OLED device and the encapsulation layer. This combining approach allows the filter to perform its light-blocking function while being structurally unified with the existing encapsulation system, thereby extending operation life without proportionally increasing device 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 reduces ambient light damage, extending the operation life of OLED displays, improving color saturation, and enhancing contrast.
Implementation Method 1
a band-pass filter device between the OLED device and the lid. The band-pass filter device includes red, green, and blue light band-pass filter films
Implementation Method 2
high energy components in the natural light would excite the organic material of the OLED displays, causing the organic material to prematurely deteriorate
Implementation Method 3
The encapsulation layer includes multiple inorganic layers and organic layers alternately stacked
Data Source
AI summary
An organic light emitting diode (OLED) display is disclosed, which includes a substrate, an OLED device having red, green, and blue light emitting layers on the substrate; an encapsulation layer on the OLED device; a lid on the encapsulation layer; and a band-pass filter device between the OLED device and the lid. The band-pass filter device includes red, green, and blue light band-pass filter films. The red light band-pass filter film is disposed oppositely to the red light emitting layer, the green light band-pass filter film is disposed oppositely to the green light emitting layer, and the blue light band-pass filter film is disposed oppositely to the blue light emitting layer. An OLED display manufacturing method is also disclosed. The present invention is able to reduce the damage caused by the ambient light on the light emitting layers so as to enhance their operation lives, color saturation, and contrast.