Display Panel Drying With Selective Infrared Pixel Heating
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Solution Overview
Problem
Existing heat treatment processes for manufacturing light-emitting display panels apply uniform temperatures, making it difficult to provide differential temperatures for pixels of different colors, leading to increased manufacturing time and cost.
Innovation Solution
A method and apparatus using a thermal heater and an infrared heater, combined with an infrared blocking mask, allow for baking pixels of different colors at distinct temperatures by applying heat through a thermal heater to all pixels and using the infrared heater and mask to selectively apply heat to specific pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If uniform heat treatment is applied to all pixels, then the manufacturing process is simple, but different bake temperatures cannot be provided for pixels of different colors
Solution Approach 1:
The heat treatment process is segmented into two independent heating systems: a thermal heater that provides uniform baseline heating to all pixels, and an infrared heater with an infrared blocking mask that provides selective differential heating to specific pixel regions. This segmentation allows simultaneous application of different temperatures to different pixel groups without requiring complete process division into multiple sequential steps.
Solution Approach 2:
The infrared blocking mask introduces local quality differences by selectively blocking infrared radiation to specific pixel regions. The mask contains infrared transmitting holes at positions corresponding to pixels requiring higher bake temperatures and infrared blocking layers at positions corresponding to pixels requiring lower bake temperatures, enabling spatially differentiated thermal treatment within a single processing step.
2Temperature
If heat treatment process is divided into multiple steps for different pixel colors, then different bake temperatures can be provided, but manufacturing time and cost increase
Solution Approach 1:
Multiple heating functions are merged into a single simultaneous processing step. The thermal heater and infrared heater operate concurrently, with the thermal heater providing uniform baseline heating to all pixels and the infrared heater providing selective additional heating to specific regions through the infrared blocking mask. This merging eliminates the need for sequential multi-step processing while achieving differential temperature requirements for different pixel colors.
Solution Approach 2:
The dual heating system maintains continuous useful action throughout the heat treatment process. Both the thermal heater and infrared heater operate simultaneously and continuously during the baking process, ensuring that all pixels receive their required thermal treatment at the same time without interruption or sequential delays, thereby reducing manufacturing time.
3Temperature
If heat treatment process is divided into multiple steps for different pixel colors, then different bake temperatures can be provided, but manufacturing cost increases
Solution Approach 1:
The infrared blocking mask serves multiple functions simultaneously: it blocks infrared radiation to specific pixel regions requiring lower temperatures, transmits infrared radiation to pixel regions requiring higher temperatures, and maintains mechanical stability during the heat treatment process. This multi-functionality eliminates the need for separate processing equipment or multiple sequential processing steps, thereby reducing manufacturing cost while achieving differential temperature treatment.
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 reduces manufacturing time and cost by enabling precise temperature control for different pixel colors, optimizing the drying process.
Implementation Method 1
The thermal heater may apply heat to the first light-emitting element, the second light-emitting element, and the third light-emitting element
Implementation Method 2
providing an infrared heater on the stage; baking at least one of the first light-emitting element, the second light-emitting element, and the third light-emitting element at different bake temperatures by the thermal heater and the infrared heater
Implementation Method 3
The infrared blocking mask may include an infrared transmitting hole at a position corresponding to the first light-emitting element and the second light-emitting element, and may include an infrared blocking layer at a position corresponding to the third light-emitting element
Data Source
AI summary
A method for drying a display panel includes providing a display panel including a first light-emitting element, a second light-emitting element, and a third light-emitting element on a stage including a thermal heater; providing an infrared heater on the stage; providing an infrared blocking mask between the display panel and the infrared heater; and baking at least one of the first light-emitting element and the second light-emitting element, and the third light-emitting element, at different bake temperatures by the thermal heater and the infrared heater.