Layered Display and Sensor Integration for Compact HMDs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Head-mounted display (HMD) devices for virtual and augmented reality face challenges in minimizing size and weight while integrating display and 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 optimize space and functionality.
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 sensing function is improved, but the size of the housing increases
Solution Approach 1:
The patent combines multiple sensors (image sensor, temperature sensor, etc.) and the display device into a single integrated housing structure. The sensors are embedded within the housing rather than being separate components, merging sensing functions with the display device structure to avoid increasing overall size.
Solution Approach 2:
The housing serves multiple functions simultaneously: it acts as the structural enclosure for the display device, houses various sensors for environmental and user monitoring, and provides mounting structures for optical components. This multi-functionality reduces the need for separate components and maintains compact size while enhancing sensing capabilities.
2Manufacturing precision
If an optical component is provided in the display device to enlarge an image, then display capability is improved, but the size of the housing increases
Solution Approach 1:
The optical component is nested within the housing structure in a space-efficient manner. The housing is designed to accommodate the optical component internally, with the display device positioned to utilize the enlarged image. This nesting arrangement allows the optical component to be integrated without proportionally increasing the external dimensions of the housing.
3Volume of moving object
If the display device is made smaller to improve wearability, then wearability is improved, but pixel recognition and graininess increase
Solution Approach 1:
The patent transitions from a two-dimensional display approach to a three-dimensional configuration by incorporating optical components that create depth and magnification. The optical system projects the display image through lenses, effectively using the third dimension to enlarge the perceived image size while maintaining a compact physical display device, thereby reducing pixel visibility and graininess.
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 reduces the size and weight of the HMD, enhancing wearability and providing high-resolution displays with improved immersion and sensing capabilities.
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-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.