OLED Pixel Structure with Shared Quadrilateral Sub-pixels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional RGB pixel arrangements in OLED display panels fall short in meeting the increasing demands for higher PPI (pixels per inch) requirements, leading to issues with power consumption and process complexity.
Innovation Solution
A pixel structure comprising a first sub-pixel surrounded by second, third, and fourth sub-pixels that form a quadrilateral, with the second, third, and fourth sub-pixels acting as secondary display elements common to four adjacent pixel units, allowing for a higher aperture ratio and reduced process difficulty while maintaining the same PPI and design margin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional RGB pixel arrangements are used, then full-color display is achieved, but the PPI (pixels per inch) requirement cannot be met
Solution Approach 1:
The pixel structure is segmented into a central first sub-pixel and surrounding second, third, and fourth sub-pixels arranged in a quadrilateral pattern. This segmentation allows each sub-pixel to be optimized independently while collectively achieving higher PPI through the shared quadrilateral arrangement that reduces overall pixel unit area.
Solution Approach 2:
The second, third, and fourth sub-pixels serving as secondary display elements are common to four adjacent pixel units, forming a shared quadrilateral structure. This multi-functional design allows these sub-pixels to contribute to multiple pixel units simultaneously, increasing PPI without proportionally increasing the total number of sub-pixels required.
2Measurement precision
If color filters are used in OLED display panels, then resolution and large panel requirements are satisfied, but power consumption increases significantly
Solution Approach 1:
The invention extracts and eliminates the color filter layer from the OLED display structure by using organic emission layers that directly emit red, green, and blue light. This removal of the color filter component prevents light energy loss and significantly reduces power consumption while maintaining full-color display capability and high resolution.
Solution Approach 2:
The mechanical/optical system of white light generation plus color filtering is replaced with a direct emission system where organic emission layers generate specific colors through electroluminescence. This substitution eliminates the need for color filters and reduces energy loss, achieving both high resolution and low power consumption.
3Reliability
If three vapor deposition processes are carried out for RGB sub-pixels, then full-color electroluminescent layers are formed, but process complexity and difficulty increase
Solution Approach 1:
The fabrication process merges the formation of multiple electroluminescent layers into a single vapor deposition process. By using a mask with patterns for all sub-pixel types (first, second, third, and fourth sub-pixels), the invention combines what would traditionally require three separate deposition processes into one, reducing process complexity and difficulty while maintaining reliable electroluminescent layer formation.
Data Source
AI summary
A pixel structure and an organic light-emitting diode (OLED) display panel incorporating the pixel structure are disclosed. Each pixel unit (110) in the pixel structure includes a first sub-pixel (111), a second sub-pixel (112), a third sub-pixel (113) and two fourth sub-pixels (114). The second sub-pixel (112), the third sub-pixel (113) and the fourth sub-pixels (114) are arranged to define a quadrilateral encompassing the first sub-pixel (111) and be common to four adjacent pixel units (110). The first sub-pixel (111) serves as a primary display element, while each of the second sub-pixel (112), the third sub-pixel (113) and the fourth sub-pixels (114) acts as a secondary display element. As a result, a higher aperture ratio of the primary display element can be obtained at the same PPI and design margin, or an increased design margin and reduced process difficulty can be obtained at the same PPI and aperture ratio.