Switchable Light Guide Plate for Full-Screen Display

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Solution Overview

Problem

Conventional under-screen camera display panels cannot achieve full-screen display due to the inability of the backlight module to provide light to areas surrounding the camera opening, leading to impaired full-screen display effects.

Innovation Solution

A display panel design featuring a backlight module with a second sub-backlight module that includes a light guide plate switchable between transparent and light-scattering states, along with a first light-shielding member to prevent light leakage, allowing for full-screen display and ambient light transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an opening area is defined in the backlight module to place the camera module, then the camera module can be installed and ambient light can be transmitted, but the display panel body cannot display images in the opening area and sealant frame area, resulting in impaired full-screen display effects

Engineering Contradiction:

Improvecamera operation capabilityVSAvoiddisplay brightness in opening area

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The backlight module is divided into two independent sub-modules: the first sub-backlight module corresponding to the display area and the second sub-backlight module covering the electronic component area. This segmentation allows each module to independently control lighting in its respective area, enabling full-screen display while maintaining camera functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second light guide plate is designed to be switchable between transparent state and light-scattering state. When transparent, it allows ambient light transmission for camera operation; when in light-scattering state, it enables the second backlight source to illuminate the electronic component area for full-screen display. This dynamic state change resolves the contradiction between camera operation and display functionality.

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If a sealant frame is disposed surrounding the opening area to prevent light leakage, then light leakage can be prevented, but the area of the sealant frame cannot provide light to the display panel body, affecting full-screen display

Engineering Contradiction:

Improvelight leakage preventionVSAvoiddisplay area coverage

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The sealing function is integrated into the second sub-backlight module structure rather than using a separate sealant frame. The second light guide plate and its components form a sealed structure that prevents light leakage from the first sub-backlight module into the electronic component area, while still allowing the display area to be fully illuminated.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sealing function is merged with the second sub-backlight module components. The second light guide plate, second backlight source, and associated structures work together to both seal the opening area and provide illumination, eliminating the need for a separate sealant frame that would block light.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If the second light guide plate is in transparent state to transmit ambient light to the electronic component area, then camera operation is enabled, but the display panel body cannot display images in this area

Engineering Contradiction:

Improveambient light transmissionVSAvoidbacklight illumination in electronic component area

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The optical properties of the second light guide plate are changed by altering its light transmission characteristics. By switching between transparent and light-scattering states, the plate's ability to transmit or diffuse light is modified, enabling it to serve dual functions of ambient light transmission and backlight illumination based on operational requirements.

Inventive Principle:

Principle #35Parameter changes

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 full-screen display while preventing light leakage, allowing the display panel to function effectively both for image display and camera operations without compromising the display area.

Implementation Method 1

the second light guide plate comprises a transparent state and a light-scattering state and is configured to be switched between the transparent state and the light-scattering state

Methodology Applied

Scientific EffectLight scattering: Scattering

Data Source

PatentUS11947156B2Display panel and electronic device

Publication Date: 2024.04.02 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

The present application provides a display panel and an electronic device. A first sub-backlight module is arranged in a display area of the display panel, and a second sub-backlight module is arranged in an electronic component area. A light guide plate of the second sub-backlight module can be switched between a light-scattering state and a transparent state, so that the electronic component area can display images and take photos. The first light-shielding member is arranged in an accommodating space defined by the display panel body and the backlight module to avoid light leakage during shooting, so that full-screen display can be realized without light leakage.