Pixel Layout Structure for High Resolution Displays
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Solution Overview
Problem
Existing display technologies face challenges in achieving high resolution and uniformity, particularly in virtual reality and augmented reality applications, due to issues with pixel density, silicon yield, and the introduction of defects like bright and dark dots.
Innovation Solution
The implementation of a display device with a diffusion layer providing a single well, utilizing all p-channel metal-oxide-semiconductor (PMOS) devices for a uniform layout, and employing multiple pixel drivers to drive a single diode with an average current, reducing the perceptibility of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional pixel layouts are used, then manufacturing is simpler, but resolution and pixel density are limited
Solution Approach 1:
Multiple pixel drivers are merged to control a single diode, with drivers sharing common diffusion regions and electrodes. This consolidation reduces the number of independent transistor structures needed, enabling higher pixel density while maintaining manufacturability through standardized process steps.
Solution Approach 2:
The patent transitions from planar pixel arrangements to a multi-layered vertical structure where multiple drivers operate beneath a single diode. This dimensional reorganization allows multiple control elements to coexist in the vertical stack, achieving higher effective resolution without increasing lateral footprint.
2Manufacturing precision
If multiple pixel drivers are used to drive a single diode, then resolution increases, but device complexity increases
Solution Approach 1:
Multiple pixel drivers share common source and drain electrodes through shared diffusion regions. This merging of electrical pathways reduces the total number of discrete electrode structures needed, lowering fabrication complexity while maintaining the functional capability of multiple independent drivers.
Solution Approach 2:
The shared diffusion regions and electrodes serve multiple functions: they act as both source/drain for different drivers and as interconnect structures. This multi-functionality reduces the number of specialized structures required, simplifying the overall device architecture despite having multiple drivers.
3Manufacturing precision
If higher pixel density is achieved, then resolution improves, but defects like bright and dark dots become more prevalent
Solution Approach 1:
The system incorporates redundant pixel drivers that can compensate for defective drivers before defects manifest as visible display errors. By having multiple drivers controlling each diode, the system creates a buffer against individual driver failures, reducing the impact of defects on overall display reliability.
Solution Approach 2:
The multiple driver architecture enables feedback mechanisms where the state of each driver can be monitored and adjusted. Defective drivers can be detected through their impact on diode performance, allowing for compensation or correction to prevent visible defects in the final display output.
4Manufacturing precision
If all PMOS devices are used for uniform layout, then manufacturing uniformity improves, but device functionality is limited
Solution Approach 1:
The patent varies the gate voltage parameters of the PMOS drivers to achieve different functional states. By changing electrical parameters rather than structural configurations, the system maintains layout uniformity while achieving the functional diversity needed for multi-driver operation and defect compensation.
Data Source
AI summary
A display device includes a diffusion layer providing a single well, an optical element configured to receive light and output the received image light including a concentric series of lens segments made up of active facets, and a waveguide having an in-coupling grating and a waveguide body optically coupled to the image light, where a polarizing component is disposed over an output surface of the optical element. A method to improve a yield of silicon backplane displays includes connecting a diode having a resolution to a backplane and repairing a defect on a pixel display area by dividing the pixel display area into at least one subcircuit, while improving geometry stylization transfer for 3D models of real-world environments. A method for suppressing crosstalk for user conversations includes receiving multiple speech signals captured by multiple microphones and generating directional data for the multiple speech signals based on spatial filtering.