OLED Edge Sub-Pixel Layout for Sawtooth-Free Display Contours
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Solution Overview
Problem
Special-shaped OLED display panels often exhibit a sawtooth shape at their edges due to mismatched sub-pixel arrangements, leading to poor display quality.
Innovation Solution
The display panel incorporates edge sub-pixels with distinct shapes and areas that match the edge contour of the display area, ensuring uniform brightness by adjusting the driving current and TFT channel ratios, allowing edge sub-pixels to fill the region between internal sub-pixels and the edge, thus aligning the edge contour with the display area's shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If strip-shaped sub-pixels are used in a special-shaped display panel, then the display area can be covered, but the edge sub-pixels form a stepped structure that creates a sawtooth shape and poor display quality
Solution Approach 1:
The patent applies different sub-pixel shapes to different locations: internal sub-pixels use a first shape while edge sub-pixels use a second shape. This local differentiation allows edge sub-pixels to align with the display area edge contour, eliminating the stepped structure and sawtooth effect while maintaining full display area coverage.
2Manufacturing precision
If edge sub-pixels with different shapes are used to fill the region between internal sub-pixels and the edge, then the sawtooth shape is eliminated, but the sub-pixel arrangement complexity increases
Solution Approach 1:
The patent segments the display area into internal sub-pixels and edge sub-pixels with distinct shapes. This segmentation allows each segment to be optimized for its specific location: internal sub-pixels maintain standard shapes while edge sub-pixels adopt customized shapes that match the display area contour, thereby eliminating the stepped structure without requiring complete redesign of all sub-pixels.
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 configuration effectively eliminates the sawtooth shape at the special-shaped edge, enhancing the display effect by maintaining uniform brightness and matching the edge contour with the display area's shape.
Implementation Method 1
the light emitting principle of the OLED display devices is that the semiconductor material and the organic light-emitting material are driven by the electric field, and the light emitting is caused by carrier injection and combination. Specifically, the OLED display devices typically adopt an ITO pixel electrode and a metal electrode as the anode and the cathode of the devices. Under certain voltage driving, electrons and holes are respectively injected from the cathode and the anode to the electron transport layer and the hole transport layer. Electrons and holes migrate through the electron transport layer and the hole transport layer to the light-emitting layer and meet each other in the light-emitting layer to form excitons and excite the light-emitting molecules for exciting, and the molecules emits emit visible light by radiation.
Data Source
AI summary
A display panel, comprising a plurality of sub-pixels of at least one color provided corresponding to a display area. The peripheral sub-pixels of the sub-pixels provided along the edge of the display area are edge sub-pixels, and the remaining sub-pixels surrounded by the edge sub-pixels and located in the display area are internal sub-pixels; a portion of the plurality of sub-pixels in the display area is a display pixel portion, and the edge contour of the display pixel portion is formed by the edge sub-pixels; the shape of the edge sub-pixels in the plurality of sub-pixels is different from that of the internal sub-pixels of the same color; the edge sub-pixels in the plurality of sub-pixels fill an area between the internal sub-pixels and the edge of the display area, so that the edge contour shape of the display pixel portion is consistent with that of the display area.