3D Interactive Display Panel with Embedded Sensor and Light Source

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Solution Overview

Problem

Conventional three-dimensional interactive display devices are bulky due to the external placement of light transmitters and image sensors, limiting their operating range and providing only two-dimensional coordinate detection.

Innovation Solution

A display device comprising a backlight source, a display panel with a sensor array, and a first light source disposed on a side of the panel, which transmits detection light of varying angles to sense the object's projection point, allowing for three-dimensional coordinate determination using trigonometric calculations based on reflective light brightness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If light transmitters and image sensors are disposed outside the liquid crystal display panel to enable three-dimensional coordinate detection, then three-dimensional coordinate detection capability is improved, but device size increases and operating range is limited

Engineering Contradiction:

Improvethree-dimensional coordinate detection capabilityVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent merges the light transmitter and image sensor functions directly into the liquid crystal display panel structure. The light transmitter is integrated into the display panel's internal structure, and the image sensor is positioned behind the display panel, allowing both components to work together within a compact form factor while enabling three-dimensional coordinate detection through their coordinated operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements a nested structure where the light transmitter is embedded within the display panel layers, and the image sensor is positioned in the space behind the display panel. This nested arrangement allows multiple functional components to occupy overlapping or adjacent spatial zones, achieving three-dimensional detection capability without proportionally increasing the overall device volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If light transmitters and image sensors are disposed outside the liquid crystal display panel, then three-dimensional coordinate detection is enabled, but operating range is limited

Engineering Contradiction:

Improvethree-dimensional coordinate detectionVSAvoidoperating range

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

By integrating the light transmitter within the display panel and positioning the image sensor immediately behind it, the patent creates a compact detection system that maintains a wide operating range. The merged structure eliminates the need for extensive external component spacing, allowing the system to detect objects across a broader area while keeping the device footprint small.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If conventional interactive display devices use external sensing devices, then three-dimensional coordinate detection is achieved, but device complexity increases

Engineering Contradiction:

Improvethree-dimensional coordinate detectionVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent reduces device complexity by merging the light transmitter into the display panel's internal structure and positioning the image sensor behind the panel, eliminating the need for separate external sensing devices. This integration simplifies the overall system architecture while maintaining three-dimensional coordinate detection capability through the coordinated operation of these combined components.

Inventive Principle:

Principle #5Merging (Combining)

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 precise three-dimensional interaction near the display panel with reduced device size, eliminating the need for external sensing devices and enhancing Z-axis resolution without increasing the device's size.

Implementation Method 1

the first reflection light is generated from an object reflecting first detection light

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

the first light source...repeatedly transmitting second detection light of different transmitting angles to the object...to generate a second reflection light, wherein the second reflection light is sensed by the sensor array

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS9052779B2Display and method of determining a position of an object applied to a three-dimensional interactive display

Publication Date: 2015.06.09 AU OPTRONICS CORP

AI summary

A display includes a backlight source, display panel, first light source, and controller. The display panel includes a sensor array for sensing first reflection light generated from an object reflecting first detection light. The first detection light is generated by the backlight source for locating a coordinate of a projection point of the object on the display panel. The first light source is disposed in a first side of the display panel, for repeatedly transmitting second detection light of different transmitting angles to the object at different time to generate a second reflection light. The second reflection light is sensed by the sensor array. The controller is for performing a corresponding operation according to a transmitting angle of the first light source and the coordinate of the projection point when brightness value of the reflective light is substantially greater than a predict value.