Pixel Region Segmentation for Reflective and Emissive Display Control
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Solution Overview
Problem
Current display devices face challenges in achieving low power consumption, high display quality, and high manufacturing yield while maintaining productivity, particularly in integrating reflective and light-emitting elements with different control mechanisms.
Innovation Solution
A display device design featuring first and second pixels with distinct display regions, where the second display region has a rhombic shape and is positioned inside the first display region, allowing for separate control of reflective and light-emitting elements using different transistors, and utilizing a metal oxide film semiconductor layer to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a transmissive liquid crystal display device is combined with a surface-emitting light source to reduce power consumption, then power consumption is reduced, but display quality deteriorates
Solution Approach 1:
The pixel is divided into two distinct display regions: a first display region for reflective display and a second display region for light emission. This segmentation allows each region to be optimized for its specific function, with the reflective region providing high display quality and the light-emitting region providing low power consumption operation.
Solution Approach 2:
Different portions of the pixel are assigned different display characteristics. The first display region uses a reflective liquid crystal display structure for high quality display, while the second display region uses a light-emitting structure for low power consumption. This local differentiation resolves the contradiction by allowing each region to excel at its intended function.
2Reliability
If reflective and light-emitting elements are integrated with different control mechanisms, then display quality improves, but device complexity increases
Solution Approach 1:
The patent combines the reflective liquid crystal display element and the light-emitting element into a single pixel structure with two display regions. The control mechanisms for both elements are integrated within the same pixel, allowing coordinated operation while maintaining separate control capabilities for each display region.
Solution Approach 2:
The pixel structure is designed to perform multiple functions: it can operate in reflective mode for high quality display, in light-emitting mode for low power consumption, and can switch between modes as needed. This multi-functionality is achieved within a unified pixel structure that accommodates both display technologies.
3Manufacturing precision
If the second display region is positioned inside the first display region, then manufacturing yield increases, but productivity decreases
Solution Approach 1:
The second display region is positioned inside the outer periphery of the first display region in a top-down view. This nested arrangement allows both display regions to be formed within the same pixel area, simplifying the manufacturing process and improving yield by reducing alignment complexity while maintaining efficient space utilization.
Solution Approach 2:
The patent specifies the positional relationship between display regions in the horizontal plane (top-down view) rather than in the vertical direction. This dimensional approach allows the second display region to be positioned inside the first display region's periphery without interfering with the vertical stacking of display elements, thereby improving manufacturing yield while maintaining productivity.
Data Source
AI summary
A display device includes a first pixel and a second pixel. The first pixel and the second pixel are adjacent to each other. Each of the first pixel and the second pixel includes a first display region and a second display region. The first display region is configured to reflect incident light. The second display region is positioned inside the first display region and configured to emit light. The second display region has at least two pairs of parallel sides. A position of the second display region inside the first display region in the first pixel and a position of the second display region inside the first display region in the second pixel are different from each other.