OLED Display Panel Light Transmission Layer Design
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Solution Overview
Problem
The existing OLED display panels suffer from poor light transmittance, leading to inadequate light uptake by under-screen electronic elements, such as cameras, due to the low penetration rate through reflective anodes, translucent cathodes, and PI layers.
Innovation Solution
An OLED display panel design featuring a light-transmitting material-filled opening within the organic film layer, with a cylindrical or polyhedron-shaped light transmission layer made of transparent glass, and a package layer comprising inorganic and organic layers to enhance light penetration and contact with electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective anode, translucent cathode and PI layer are used in the OLED structure, then the OLED can achieve normal light emission function, but the light transmittance is poor and light intake of under-screen camera is insufficient
Solution Approach 1:
The patent segments the OLED structure by introducing a light transmission area that divides the display region into a non-transmission area (with reflective anode and standard layers) and a transmission area (with transparent anode and modified layers). This segmentation allows different regions to serve different functions: the non-transmission area provides normal display output while the transmission area allows natural light to pass through to the under-screen camera, thereby resolving the contradiction between light emission function and light transmittance.
Solution Approach 2:
The patent applies local quality by modifying specific properties in the light transmission area: using a transparent anode instead of reflective anode, adjusting the cathode transparency, and optimizing the PI layer in the transmission region. These localized property changes enable the OLED to maintain its light emission function in the non-transmission area while achieving high light transmittance in the transmission area, thus resolving the contradiction between these two requirements.
2Area of stationary object
If the screen proportion is increased to achieve full screen display, then the visual experience is improved, but the light intake for under-screen camera is further reduced due to larger area of low transmittance layers
Solution Approach 1:
The patent segments the display area into distinct transmission and non-transmission regions, allowing the screen proportion to be maximized while dedicating specific segments (the transmission areas) to light passage. This segmentation enables the overall screen area to be large for full-screen display effect, while localized transmission segments ensure sufficient light intake for the under-screen camera, resolving the contradiction between screen proportion and light intake.
3Illumination intensity
If laser cutting is used to create openings for light transmission, then the light transmittance is improved, but the manufacturing complexity and potential damage to the substrate increase
Solution Approach 1:
The patent applies preliminary action by pre-designing the light transmission area into the OLED structure during the manufacturing process, rather than creating openings through laser cutting after assembly. The transparent anode and modified layers are deposited in the transmission region during the standard OLED fabrication process, eliminating the need for subsequent laser cutting operations. This preliminary integration of the light transmission function into the manufacturing process improves light transmittance while avoiding the complexity and damage risks associated with laser cutting.
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 design significantly reduces light loss and enhances the light uptake of under-screen sensors, improving the overall light penetration and visual experience without the need for laser cutting, thereby increasing the screen's effective light intake.
Implementation Method 1
The natural light passes through the OLED device to excite a sensor of the camera... the light-transmitting material is transparent glass
Data Source
AI summary
An OLED display panel and the method for manufacturing the same are disclosed in the present invention. The OLED display panel includes an organic film layer, an array layer, an organic light emitting layer, and a package layer disposed on the organic light emitting layer, which are stacked in layers. The organic film layer is provided with a first opening, which is filled with a light-transmitting material to form a light transmission layer. An electronic component area is disposed on one side of the organic film layer away from the package layer and is corresponding to the light transmission layer.