OLED Color Filter Layout for Higher Laser Repair Yield
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Solution Overview
Problem
Conventional OLED display panels face low laser repair yields due to the low light transmission rate of color filter layers for laser light, which affects the efficiency of repairing bright spots and other defects.
Innovation Solution
The OLED display panel incorporates a color filter layer with filter patterns that have a light transmission rate greater than 90% for laser light in the wavelength range of 900 nm to 1200 nm, specifically using carbonized light-emitting materials with a carbon content greater than 50%, and a laser repair method that utilizes laser light in this wavelength range to repair bright spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional color filter layers are used in OLED display panels, then the display function is maintained, but the light transmission rate for laser light is low, resulting in low laser repair yields
Solution Approach 1:
The patent changes the material composition parameter of the light-emitting layer by incorporating carbonized light-emitting materials with carbon content of 5-50%, which fundamentally alters the interaction between the layer and laser light, enabling high transmission rates for laser repair while maintaining display function
Solution Approach 2:
The patent creates a composite light-emitting material system by combining conventional light-emitting materials with carbonized materials, achieving a balance between display performance and laser transmission properties that neither material could achieve alone
2Ease of repair
If laser light is used to repair bright spots in OLED panels, then defect elimination is achieved, but the color filter layer blocks most laser light, making repair inefficient
Solution Approach 1:
The patent modifies the optical parameters of the light-emitting layer through carbonization, changing its absorption characteristics for laser wavelengths while preserving its electroluminescence properties, thus allowing laser light to pass through for efficient repair
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
The increased light transmission rate of the filter patterns enhances the laser repair yield, effectively converting bright spots into dark spots without affecting normal display functions, thus improving the repair efficiency.
Implementation Method 1
irradiating a light-emitting material of a light-emitting layer with a light of a fixed wavelength to make the light-emitting material fail
Implementation Method 2
at least one of the light-emitting patterns comprises a carbonized light-emitting material, the carbonized light-emitting material comprises at least carbon black
Data Source
AI summary
The present application provides an organic light-emitting diode (OLED) display panel and a laser repair method. The OLED display panel includes color filters with the light transmission rates of greater than 90% for laser light with a wavelength range of 900 nm to 1200 nm, and includes at least one light-emitting pattern containing carbon black. The laser repair method increases the light transmission rates of the filter patterns for the laser light with the wavelength range of 900 nm to 1200 nm, so a laser repair yield is increased.