Transparent Display Transparency Control by User Presence Detection

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Solution Overview

Problem

Existing transparent display technologies lack the ability to adjust light transmittance optimally for TV viewing scenarios, and there is no mechanism to recognize users in front of the display to adjust transparency accordingly.

Innovation Solution

A transparent display device equipped with a camera and controller that recognizes the presence or absence of a user, adjusting transparency based on user detection and environmental conditions such as direction and time zone.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the transparent display blocks light to improve visibility of displayed content, then the visibility of the display is improved, but the transparency of the display deteriorates

Engineering Contradiction:

Improvevisibility of displayed contentVSAvoidtransparency of display

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The display panel's light blocking property is made dynamically adjustable through a controller that modifies the light blocking degree based on detected environmental conditions (ambient light, background image brightness) and viewing conditions (user presence, viewing direction), allowing the display to transition between transparent and opaque states as needed

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The light blocking degree of the display panel is changed as a controllable parameter, adjusted by the controller according to measured ambient light intensity, background image luminance, and detected user presence, enabling optimization of both visibility and transparency based on operating conditions

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If the transparent display maintains high transparency to preserve background visibility, then the transparency is improved, but the visibility of displayed content deteriorates

Engineering Contradiction:

Improvetransparency of displayVSAvoidvisibility of displayed content

Core Design Contradiction:

Ease of manufactureVSIllumination intensity

Solution Approach 1:

The display dynamically adjusts its light blocking degree in response to changing conditions, increasing opacity when content visibility is needed and returning to transparent state when not in use or when ambient conditions provide sufficient contrast

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The controller continuously monitors ambient light conditions, background image characteristics, and user presence detection feedback to automatically adjust the light blocking degree, creating a closed-loop system that optimizes visibility while maintaining transparency when appropriate

Inventive Principle:

Principle #23Feedback

3Illumination intensity

If the transparent display blocks sunlight to prevent viewing obstruction, then the visibility under sunlight is improved, but the transparency deteriorates during daytime

Engineering Contradiction:

Improvevisibility under sunlightVSAvoidtransparency during daytime

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The light blocking degree parameter is adjusted based on detected ambient light intensity and time of day, with the controller increasing opacity during sunny daytime conditions to prevent sunlight from washing out the displayed content while maintaining transparency during nighttime or low-light conditions

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If the transparent display adjusts transparency frequently to optimize for different conditions, then the adaptability is improved, but the device complexity increases

Engineering Contradiction:

Improveadaptability to conditionsVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The controller performs multiple functions using a single integrated unit: detecting ambient light conditions, detecting user presence, analyzing background image characteristics, and controlling the light blocking degree, thereby achieving high adaptability without proportionally increasing device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

5Ease of manufacture

If the transparent display remains transparent when no user is present to save energy and maintain aesthetics, then the transparency is improved, but the visibility when user returns deteriorates temporarily

Engineering Contradiction:

Improvetransparency when no userVSAvoidvisibility when user returns

Core Design Contradiction:

Ease of manufactureVSIllumination intensity

Solution Approach 1:

The controller detects user approach in advance using the camera module and begins adjusting the light blocking degree before the user actually arrives, ensuring that the display is already optimized for visibility by the time the user returns, eliminating any temporary visibility degradation

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260104753A1Transparent display device

Publication Date: 2026.04.16 LG ELECTRONICS INC

AI summary

An objective of the present disclosure is to adjust the degree of light-shielding of a transparent display according to a surrounding situation. A transparent display device according to an embodiment of the present disclosure includes a transparent display, a camera, and a controller configured to recognize a user located in front of the transparent display on the basis of an image captured through the camera and increase in transparency of the transparent display when an absence of the user is sensed during a first time after the recognition of the user.