OLED Sign Board with Pixel Electrodes for Mass Production
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Solution Overview
Problem
Conventional sign boards using fluorescent lamps for backlights have unsatisfactory visibility and are difficult to mass produce due to the need for specific lamp arrangements and manual manufacturing for each design, complicating the manufacturing process.
Innovation Solution
A sign board incorporating an organic light emitting device (OLED) with a substrate, conductive lines, pixel electrodes, an intermediate light emitting layer, and a face electrode, allowing for easy adaptation of various designs through electrical connections and mass production by connecting conductive lines and electrodes as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If fluorescent lamps are used as backlight in conventional sign boards, then the sign board can display images with specific designs, but the visibility is not satisfactory
Solution Approach 1:
The patent replaces the mechanical arrangement of fluorescent lamps with an OLED (organic light emitting device) that generates light electronically. The OLED includes pixel electrodes, conductive lines, and light emitting layers that can be electrically controlled to produce illumination, substituting the mechanical lamp arrangement system with an electronic light generation system that provides superior visibility and easier manufacturing through mass-producible OLED panels.
Solution Approach 2:
The patent changes the fundamental parameter of light generation from fluorescent lamp emission to OLED electroluminescence. By using organic light emitting materials in the OLED structure, the system achieves higher visibility through more efficient light emission while enabling standard semiconductor manufacturing processes for mass production, resolving the contradiction between visibility improvement and manufacturing ease.
2Adaptability or versatility
If light-emitting lamps are arranged in specific locations according to specific designs, then images with specific designs can be realized, but mass production becomes difficult
Solution Approach 1:
The patent segments the sign board into a matrix of pixel electrodes controlled by conductive lines in row and column arrangements. Each pixel can be independently controlled through the conductive line network, allowing specific designs to be created by selectively activating different pixel regions. This segmented structure enables both design flexibility and mass production, as the entire pixel matrix can be manufactured as a single OLED panel while still allowing programmable design configurations.
Solution Approach 2:
The patent introduces dynamic control capability through the OLED's electrical addressing system. The conductive lines and pixel electrodes can be selectively activated in different patterns to display various designs, allowing the sign board to dynamically change its displayed image without physical reconfiguration. This dynamic electrical control replaces static mechanical lamp arrangements, enabling both design versatility and mass-producible standardized panels.
3Reliability
If light-emitting lamps are individually examined and installed before manufacturing, then the sign board can function properly, but the manufacturing process becomes complicated
Solution Approach 1:
The patent merges the light-emitting function into a single integrated OLED panel that combines the backlight source, control electronics, and display elements into one monolithic structure. The OLED panel is manufactured as a complete functional unit with all conductive lines, pixel electrodes, and light emitting layers already interconnected, eliminating the need for separate examination and installation of individual lamps. This integration maintains functional reliability while dramatically simplifying the manufacturing process to standard OLED fabrication procedures.
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 OLED sign board achieves high visibility and simplifies the manufacturing process by enabling mass production and easy realization of various designs, with improved visibility and reduced complexity in producing specific patterned images.
Implementation Method 1
an organic light emitting device (OLED)... an intermediate layer disposed on the pixel electrodes and including a light emitting layer for emitting light
Data Source
AI summary
Provided is a high-quality sign board including an organic light emitting device (OLED) which can be easily adapted to various designs applied by users to the sign board. The sign board includes a substrate, a plurality of first conductive lines disposed on the substrate, a plurality of pixel electrodes electrically connected with the first conductive lines, an intermediate layer comprising a light emitting layer disposed on the pixel electrodes, and a face electrode disposed on the intermediate layer. In another embodiment, the sign board further includes a plurality of second conductive lines, each of which connects at least two of the first conductive lines to each other. In still another embodiment, the plurality of pixel electrodes includes a plurality of first pixel electrodes electrically connected with the first conductive lines, and a plurality of second pixel electrodes that are not electrically connected with the first conductive lines.