Overlapping Driver Circuit Layout for High Pixel Density Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with a short distance between the display surface and the user, such as head-mounted displays and electronic viewfinders, suffer from pixel granularity issues, leading to decreased immersion and realistic feeling, particularly due to low pixel density and resolution.
Innovation Solution
A display device design featuring a stacked structure with overlapping gate driver and source driver circuits, utilizing metal oxide transistors with elements like Al, Ga, Y, or Sn, and Zn, to achieve high pixel density and resolution, enabling high-definition, high-luminance, and high-dynamic-range image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display distance is shortened to improve immersion in AR/VR applications, then the sense of immersion is improved, but pixel granularity becomes visible and decreases image quality
Solution Approach 1:
The patent transitions from planar pixel arrangement to a three-dimensional micro-lens array structure, where multiple lenses are stacked vertically. This dimensional change allows light from a single pixel to be distributed across multiple lens elements, effectively increasing the optical resolution without requiring higher pixel density on the display panel itself.
Solution Approach 2:
The patent changes the optical parameters by introducing micro-lenses with specific focal lengths and aperture ratios. By optimizing these optical parameters, the system achieves higher effective resolution and reduces pixel visibility while maintaining a short display distance, thus improving both immersion and image quality.
2Manufacturing precision
If pixel density is increased to reduce granularity perception, then image quality is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the optical function from the display function by introducing a separate micro-lens array layer. This segmentation allows the display panel to maintain standard pixel densities while the optical layer provides the additional resolution enhancement, thereby improving image quality without proportionally increasing the complexity of the display panel itself.
Solution Approach 2:
The patent employs a composite structure combining a standard display panel with a micro-lens array made of optical materials. This composite approach leverages the strengths of both components: the display panel provides the base image, while the micro-lens array enhances the optical output, achieving high effective resolution without requiring the display panel to be manufactured with extremely fine pixels.
3Productivity
If metal oxide transistors are used to achieve high field-effect mobility for high-resolution display, then display performance is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent optimizes the composition parameters of the metal oxide semiconductor material, specifically adjusting the ratios of indium, gallium, and zinc to achieve the desired field-effect mobility. By carefully controlling these compositional parameters, the patent achieves high-performance transistors that can drive high-resolution displays while maintaining compatibility with existing manufacturing processes.
Solution Approach 2:
The patent incorporates preliminary doping and annealing steps in the manufacturing process to pre-establish the desired electrical characteristics of the metal oxide semiconductor layers. These preliminary actions reduce the need for complex post-processing steps and enable better control over transistor performance, thereby improving ease of manufacture while achieving high field-effect mobility.
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
The solution provides a display device with significantly increased pixel density, enabling high-definition and high-luminance image display with a high dynamic range, suitable for applications like VR, AR, and electronic viewfinders, while reducing power consumption and frame size.
Implementation Method 1
A transistor using a metal oxide has field-effect mobility higher than that in the case where amorphous silicon is used
Implementation Method 2
A metal oxide that can be used for a semiconductor layer can be formed by a sputtering method
Data Source
AI summary
A high-definition display device is provided. A small display device is provided. In the display device, a first layer and a second layer are stacked and provided. The first layer includes a gate driver circuit and a source driver circuit, and the second layer includes a display portion. The gate driver circuit and the source driver circuit are provided to include a region overlapping with the display portion. The gate driver circuit and the source driver circuit have an overlap region where they are not strictly separated from each other. Five or more gate driver circuits and five or more source driver circuits can be provided.