Layered Display and Sensor Integration for Compact HMDs
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Solution Overview
Problem
Head-mounted display (HMD) devices for virtual and augmented reality face challenges in reducing size and weight while integrating sensing functions, leading to impaired wearability due to increased component count and size.
Innovation Solution
The electronic device features a layered structure with a driver circuit, arithmetic circuit, pixel circuits, and light-receiving and light-emitting devices, utilizing silicon and metal oxide transistors, and organic light-emitting diodes, with light-receiving devices separated by photolithography, to minimize size and maximize resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various kinds of sensors such as an image sensor and a temperature sensor are installed in a housing, then the sensing function is improved, but the size of the HMD-type electronic device increases
Solution Approach 1:
The patent combines multiple sensors (image sensor, temperature sensor, other sensors) into a single integrated sensor module that is incorporated into the display device structure. This merging of multiple sensing functions into one compact unit allows the HMD to achieve enhanced adaptability and versatility without proportionally increasing the overall device size, as the sensors share common structural support and housing space within the display assembly.
2Volume of stationary object
If the size of the housing is reduced, then the wearability is improved, but the number of components must be reduced
Solution Approach 1:
The patent implements a nested structure where the sensor module is embedded within the display device housing, and various sensor components are arranged in a compact, space-efficient configuration. The image sensor, temperature sensor, and other sensors are nested within the same housing structure, allowing multiple functional components to coexist in a reduced overall volume while maintaining full sensing capabilities.
3Volume of stationary object
If the display device is reduced in size, then the wearability is improved, but the resolution may be compromised
Solution Approach 1:
The patent employs parameter changes in the transistor design, specifically using metal oxide semiconductors with optimized electrical characteristics to enable high-resolution display functionality in a compact form factor. By adjusting material parameters and device geometry at the micro-scale, the display maintains high resolution despite the reduced overall size of the HMD.
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 results in a compact, high-resolution display that enhances wearability and immersion, allowing for efficient image capture and display while maintaining effective sensing functions.
Implementation Method 1
the light-receiving devices are each preferably configured to capture an image of the user's eyes and/or the surroundings of the eyes
Implementation Method 2
the light-receiving devices each preferably include an organic light-emitting diode, and the light-emitting devices are preferably organic EL devices
Implementation Method 3
the light-emitting devices are preferably organic EL devices
Data Source
AI summary
To provide a novel electronic device. The electronic device includes a housing and a display device. The display device includes a first layer, a second layer, and a third layer. The first layer, the second layer, and the third layer are provided in different layers. The first layer includes a driver circuit and an arithmetic circuit. The second layer includes pixel circuits and a cell array. The third layer includes light-receiving devices and light-emitting devices. The pixel circuits each have a function of controlling light emission of the light-emitting device. The driver circuit has a function of controlling the pixel circuits. The arithmetic circuit has a function of performing arithmetic processing on the basis of first data corresponding to currents output from the light-receiving devices and second data corresponding to a potential held in the cell array.