Embedded Optical Sensor Array for 3D Display Positioning
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Solution Overview
Problem
Existing 3D interactive systems face limitations in capturing interactions near the display panel due to a limited capturing angle, particularly when using CCD cameras, which increases system volume and restricts interactive range.
Innovation Solution
A method utilizing an optical sensor array with alternately arranged first and second optical sensor rows and a barrier to determine the pointing object's position by analyzing light intensity distributions, allowing for positional information to be obtained in multiple directions without increasing system volume, by embedding optical sensors within the display panel and using a barrier as a visual disparity mask.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a CCD camera is used as the sensing component, then the 3D interactive system can capture images, but the system volume increases and the capturing angle is limited
Solution Approach 1:
The patent merges the sensing function into the display panel by embedding optical sensors directly within the display structure. This integration eliminates the need for separate external sensing components like CCD cameras, thereby maintaining image capture capability while significantly reducing system volume.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both the display medium and the sensing component. By embedding optical sensors within the display panel, the system achieves both display and interaction detection functions using a single integrated component, avoiding volume expansion from additional dedicated sensing devices.
2Measurement precision
If a CCD camera is used as the sensing component, then the 3D interactive system can capture images, but the capturing angle is limited and interactions near the display panel cannot be detected
Solution Approach 1:
By integrating optical sensors directly into the display panel, the sensing components are positioned at the optimal location for detecting interactions near the display surface. This eliminates the distance and angle limitations inherent in external CCD cameras, enabling detection of interactions in the region immediately adjacent to the display panel.
Solution Approach 2:
The patent employs multiple optical sensor rows with different orientations (first optical sensor rows and second optical sensor rows) arranged in specific patterns within the display panel. This local arrangement of sensors with specialized orientations enables detection of interactions from multiple angles simultaneously, greatly expanding the effective capturing angle for near-field interactions.
3Volume of stationary object
If optical sensors are embedded in the display panel, then the system volume is reduced, but the complexity of determining pointing object position increases
Solution Approach 1:
The patent divides the optical sensor array into multiple segments: first optical sensor rows and second optical sensor rows with different orientations. By segmenting the sensor array and assigning different functional roles to different segments, the system simplifies the calculation process for determining pointing object position, as each segment provides specific directional information that can be processed independently.
Solution Approach 2:
The patent introduces a barrier with barrier strips as an intermediary element between the pointing object and the optical sensors. This barrier creates distinct light-shading patterns that serve as intermediate signals, making it easier to determine the pointing object's position by analyzing the light-shading intensity maximum values, thereby simplifying the overall position determination process.
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
Enables 3D image display and interaction in the region near the display panel without volume expansion, widening the interactive range and allowing for accurate determination of pointing object positions in multiple directions.
Implementation Method 1
acquiring a first detected light intensity distribution of the optical sensors of the first optical sensor rows and a second detected light intensity distribution of the optical sensors of the second optical sensor rows
Data Source
AI summary
An exemplary method of determining a pointing object position for three-dimensional interactive system, adapted for an interaction between a pointing object and a three-dimensional interaction display with embedded optical sensors. The method includes the steps of: acquiring a two-dimensional detected light intensity distribution caused by the pointing object acting on the three-dimensional interaction display; obtaining two light-shading intensity maximum values according to the two-dimensional detected light intensity distribution; and determining a one-dimensional positional information of the pointing object on a distance direction of the pointing object relative to the three-dimensional interaction display by use of the positional distance between the two light-shading intensity maximum values.