OLED Display Panel Layout for Blue Pixel Brightness Retention
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Solution Overview
Problem
The brightness attenuation and reduced light-emitting efficiency of blue pixels in OLED display panels due to the use of white light-emitting layers for all color filters, leading to insufficient product performance.
Innovation Solution
Employing a blue light-emitting layer for the blue color filter region and a white light-emitting layer for the red and green color filter regions, while maintaining the same brightness levels, thereby increasing the light-emitting efficiency and prolonging the lifespan of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a white light-emitting layer is used for all color filters (red, green, and blue), then the manufacturing process is simple and the structure is uniform, but the blue pixel brightness attenuates severely and the light-emitting efficiency decreases
Solution Approach 1:
The patent applies local quality by differentiating the light-emitting layer composition for different color regions. Specifically, the blue color filter region uses a blue light-emitting layer with blue light-emitting material, while the red and green color filter regions use a white light-emitting layer with white light-emitting material. This localized differentiation resolves the contradiction by optimizing blue pixel brightness where needed while maintaining manufacturing simplicity for the majority regions.
2Device complexity
If a white light-emitting layer is used for all color filters, then the device structure is simplified, but the lifespan of the display device is reduced
Solution Approach 1:
The patent implements local quality by applying different light-emitting layer configurations to different color filter regions. The blue color filter region is equipped with a blue light-emitting layer that emits blue light directly, avoiding the need for blue color filter transmission and thereby extending the display device lifespan. The red and green regions continue to use the simpler white light-emitting layer approach, maintaining overall structural simplicity.
3Illumination intensity
If a white light-emitting layer is used for all color filters, then the overall brightness can be maintained, but the light-emitting efficiency of the display device is reduced
Solution Approach 1:
The patent applies local quality by optimizing the light-emitting layer for the blue color filter region with a blue light-emitting layer that directly emits blue light. This eliminates the energy loss associated with using a white light-emitting layer and blue color filter combination, thereby improving light-emitting efficiency for blue pixels while maintaining overall display brightness through the white light-emitting layer in red and green regions.
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 approach alleviates blue brightness attenuation without complicating the driving circuit or reducing overall brightness, enhancing the light-emitting efficiency and extending the service life of the OLED display panel.
Implementation Method 1
OLED (Organic Light Emitting Display, or organic electroluminescence display) is considered to be the next generation mainstream flat panel display technology
Implementation Method 2
add filters to display red, green, and blue light
Data Source
AI summary
This application discloses a display panel, a display device, and a method for manufacturing the display panel. A substrate, an anode, a pixel defining layer, a light-emitting layer, and a cathode are arranged in sequence. The cathode covers the light-emitting layer and the pixel defining layer. The filter layer is disposed on a side of the cathode facing away from the substrate. The second light-emitting region corresponds to the blue color filter. The second light-emitting region includes a blue light-emitting layer made of a blue light emitting material.