Slidable Flexible Display Control via Ambient Light Detection

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Solution Overview

Problem

Conventional rollable display devices lack real-time control over the effective display area as the slidable region rolls up or unrolls, leading to poor flexibility and inaccurate image control.

Innovation Solution

A display device with a flexible display panel, driver IC, and detection circuits that detect ambient light to transmit detection currents, allowing the driver IC to determine the effective display region length and control image display based on the detection current magnitude, ensuring accurate and flexible image presentation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the slidable region rolls up or unrolls to change display area, then the flexibility and adaptability of the display device is improved, but the real-time control over the effective display area becomes difficult to achieve

Engineering Contradiction:

Improveflexibility of display areaVSAvoiddetermination accuracy of effective display region length

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical measurement methods with optical detection. Phototransistors detect ambient light changes caused by the slidable region's position, converting mechanical displacement into electrical signals that indicate the effective display region length, achieving precise measurement without mechanical sensors.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces ambient light as an intermediary to detect the slidable region's position. The light intensity changes serve as a mediator between the mechanical movement and the control system, enabling indirect but accurate measurement of the effective display region through optical detection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If detection circuits are added to detect ambient light and determine effective display region, then the measurement precision and control accuracy are improved, but the device complexity increases

Engineering Contradiction:

Improvedetermination accuracy of effective display region lengthVSAvoidcomplexity of detection circuits and signal lines

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The detection circuits serve multiple functions: they detect ambient light intensity, determine the effective display region length, and provide feedback for real-time image control. This multi-functionality reduces the need for separate dedicated components for each task, thereby managing complexity while achieving precise measurement.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the detection circuits with the existing display panel structure, integrating phototransistors and signal lines into the peripheral region. This merging approach consolidates multiple functions into a unified system rather than adding separate independent components, reducing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

3Speed

If the driver IC continuously monitors detection current to control image display in real-time, then the control responsiveness and image display quality are improved, but the energy consumption increases

Engineering Contradiction:

Improvecontrol responsivenessVSAvoidenergy consumption of driver IC

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The driver IC performs periodic monitoring of the detection current at key moments during the slidable region's movement, rather than continuous monitoring. This periodic sampling approach maintains real-time control responsiveness while significantly reducing energy consumption compared to continuous operation.

Inventive Principle:

Principle #19Periodic action

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 high flexibility and accurate determination of the effective display region length, ensuring real-time control and improved image display quality as the slidable region rolls up or unrolls.

Implementation Method 1

each of the detection circuits includes at least one phototransistor... configured to transmit a detection current to the detection signal line based on an input signal provided by the input signal line when detecting external ambient light

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS12170040B2Flexible display device with a slidable region and control method thereof

Publication Date: 2024.12.17 BEIJING BOE TECH DEV CO LTD

AI summary

Provided is a display device, which includes a flexible display panel including a display region and a peripheral region surrounding the display region; a driver integrated circuit (IC) disposed in the peripheral region; a plurality of detection circuits disposed in the peripheral region and close to the slidable region; at least one input signal line; at least one control signal line and at least one detection signal line.