OLED Display Substrate Segmented Light Emitting Units
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Solution Overview
Problem
The existing OLED display technology is limited by the minimum film forming width, which restricts the reduction in size of light emitting units, thereby hindering the increase in display resolution.
Innovation Solution
The display substrate is divided into multiple light emitting units, each with a specific configuration of layers formed from the same material in a film forming process, allowing for the integration of multiple light emitting layers within a single film forming width, and the use of barrier layers to control carrier and exciton transport, enabling smaller light emitting component widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If each light emitting unit is provided with a light emitting layer of a primary color with width not smaller than the lower limit of film forming width, then the film forming process can be completed, but the overall width of each OLED becomes large which restricts increase in display resolution
Solution Approach 1:
The patent divides each pixel into multiple light emitting units (first, second, third, and fourth light emitting units), where each unit contains a light emitting layer. By segmenting the pixel structure, the total width required for one pixel can be distributed across multiple narrower units, effectively reducing the width constraint per unit while maintaining overall pixel functionality and improving display resolution.
Solution Approach 2:
The patent merges adjacent light emitting layers from different light emitting units into a single integral portion formed by the same film forming process. Specifically, the light emitting layer of the first light emitting unit and the light emitting layer of the second light emitting unit are formed as an integral portion, as are the third and fourth light emitting units. This merging allows the film forming process to operate at its lower limit width while achieving the desired resolution through the combined structure.
Data Source
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AI summary
The present invention provide a display substrate, a fabricating method thereof, and a display apparatus, and belongs to the filed of display technology. The display substrate comprises a plurality of pixels, each of the pixels is divided into a plurality of light emitting units, each of the light emitting units comprises an anode, a cathode, a carrier transport layer, and a light emitting layer, wherein at least one of the plurality of light emitting units comprises a light emitting layer and at least one process auxiliary layer; the process auxiliary layer and the light emitting layer in other light emitting units are formed into an integral portion from a same material in a film forming process. Display resolution can be improved in the present invention.