OLED Display Panel Color Resistor Structure for Reducing Reflection
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Solution Overview
Problem
COE OLED display panels exhibit a color separation phenomenon in a dark state due to directional reflection by smooth electrode layers, leading to uneven light distribution and color separation.
Innovation Solution
The OLED display panel design includes a color resistor structure with a chromatic color resistor layer and two black matrix layers arranged on either side of the color resistor layer, along with scattering layers to diffuse light and reduce directional reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circular polarizer and flexible touch control substrate are attached to lower reflection, then reflection is reduced, but the thickness increases which affects flexibility and folding performance
Solution Approach 1:
The patent extracts and removes the circular polarizer and flexible touch control substrate from the display structure, replacing them with a CF on Encapsulation (COE) technology that forms a chromatic color resistor layer directly on the encapsulated light-emitting device, thereby eliminating the need for thick additional layers while maintaining reflection reduction functionality
Solution Approach 2:
The patent merges the encapsulation structure with the color resistor function by forming the chromatic color resistor layer directly on the encapsulated light-emitting device, combining protection and optical functionality into a single integrated structure that reduces overall thickness
2Length of stationary object
If COE technology is used to reduce thickness and reflection, then panel thickness is reduced, but color separation phenomenon occurs in dark state under light source irradiation
Solution Approach 1:
The patent segments the black matrix function into two separate layers: a first black matrix layer on the front surface and a second black matrix layer on the rear surface of the chromatic color resistor layer, with each layer independently addressing color separation in different regions and improving overall color uniformity
Solution Approach 2:
The patent applies different black matrix layers at different locations (front and rear surfaces) to address the local color separation issues that occur in specific regions under light source irradiation, with each layer optimized for its specific position and function
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 significantly reduces the color separation degree of reflected light in the dark state, improving color uniformity and reducing the bending radius of the OLED module.
Implementation Method 1
both of the flexible touch control substrate and the circular polarizer are thick, which will affect the flexibility and folding performance of a whole OLED module, in view of this, in order to implement a better effect of folding and reduce a bending radius, a CF on Encapsulation (COE) technology is proposed currently, that is, a chromatic color resistor layer is formed on a thin-film encapsulated light-emitting device through a low-temperature yellow light process
Data Source
AI summary
The present application relates to the technical field of display, and discloses an OLED display panel and a display device. The OLED display panel includes a drive backplane; and an OLED device, an encapsulation structure and a color resistor structure which are arranged on the drive backplane; the encapsulation structure and the color resistor structure are located on a side, facing away from the drive backplane, of the OLED device, and the color resistor structure includes a chromatic color resistor layer, a first BM and a second BM; and the first BM is located on a side, facing away from the drive backplane, of the chromatic color resistor layer, and the second BM is located on a side, facing the drive backplane, of the chromatic color resistor layer.