Micro Display Driving Substrate for HMD Signal Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional head-mounted display (HMD) terminals are bulky and heavy due to numerous components, including data and power transmission wires, which hinder their slimness and practicality, especially when using a conventional LCoS panel.
Innovation Solution
A micro display driving substrate is developed that embeds essential devices like a differential signal receiver, light source control unit, and communication units, converting video and control signals into differential signals for efficient transmission, reducing the need for separate wires and components, and integrating them into a single backplane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LCoS panel with separate components is used, then signal transmission reliability is improved, but device weight and volume increase
Solution Approach 1:
The patent merges the differential signal receiver, light source control unit, and other control circuits directly into the driving substrate (backplane) of the HMD terminal. This integration eliminates the need for separate components and their associated transmission wires, significantly reducing the overall weight and volume of the HMD device while maintaining signal transmission reliability through direct electrical connections on the substrate.
Solution Approach 2:
The driving substrate is designed to perform multiple functions: it serves as both the display driver for the LCoS panel and as the integration platform for the differential signal receiver, light source control unit, and other control circuits. This multi-functional design consolidates what would traditionally be separate components into a single unified substrate, reducing weight without compromising functionality.
2Stability of the object's composition
If multiple separate components are installed in HMD terminal, then signal transmission stability is improved, but device volume and thickness increase
Solution Approach 1:
The patent combines multiple control functions into a single integrated driving substrate. The differential signal receiver, light source control unit, and other control circuits are all fabricated on the same substrate as the LCoS panel driver, eliminating the need for separate component housings and reducing overall device volume while maintaining signal stability through controlled impedance traces and direct connections.
Solution Approach 2:
The patent transitions from a three-dimensional arrangement of separate components stacked or mounted in space to a two-dimensional integration on a flat substrate. By laying out all control circuits on the driving substrate in a planar configuration, the device achieves compact volume while maintaining stable signal transmission through optimized trace routing and direct electrical connections.
3Reliability
If separate transmission wires are used for data and power, then signal transmission quality is improved, but device thickness and practicality worsen
Solution Approach 1:
The patent integrates power transmission and data transmission pathways directly into the driving substrate through dedicated trace networks. This eliminates the need for bulky separate transmission wires and connectors, reducing device thickness and improving practicality while maintaining signal quality through controlled impedance design and direct electrical connections between components.
Data Source
AI summary
A micro display driving substrate for a head-mounted display (HMD) terminal unit worn by a user, comprises: an LCoS (Liquid Crystal on Silicon) pixel array configured of one or more first electrode lines arranged while keeping a predetermined distance and one or more second electrode lines arranged to intersect with the first electrode lines while keeping a predetermined distance; a data driving unit for supplying the video data converted into an analog signal to the first electrode lines of the LCoS pixel array; a line driving unit for receiving the video control signal and providing a line selection signal for selecting a second electrode line; and a support control unit for driving a light source needed to display an image.