Liquid Crystal Display Transparent Region for Optical Devices
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Solution Overview
Problem
Conventional mobile phone designs have a low screen-to-body ratio due to the need to accommodate camera modules and ambient light sensors on the periphery of the screen, limiting the arrangement space and resulting in a smaller display area.
Innovation Solution
A liquid crystal display with a transparent region for light transmission, a light shielding region, and a display region, featuring a stacked structure with an upper and lower polarizer, a liquid crystal box, and a backlight module, where the upper polarizer has a transparent hole and the lower polarizer is continuous across all regions, along with a light shielding part and double-sided tape to prevent light leakage, allowing for a more compact and efficient use of space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If camera module and ambient light sensor are placed on the periphery of the screen, then the optical devices can be accommodated, but the screen-to-body ratio is reduced and arrangement space is limited
Solution Approach 1:
The patent transitions from lateral arrangement of optical devices to vertical stacking by introducing a transparent region in the display panel that allows light transmission. This enables optical devices to be positioned in the thickness dimension (below the display panel) rather than occupying lateral screen space, thereby increasing the screen-to-body ratio while accommodating camera modules and sensors.
Solution Approach 2:
The patent embeds the optical devices within the thickness dimension of the display structure. The transparent region allows the display panel to be transparent to specific wavelengths, enabling optical devices to be nested below the panel in the Z-direction, effectively utilizing the thickness space rather than competing for lateral display area.
2Area of stationary object
If a transparent region is introduced in the display panel, then the screen-to-body ratio is increased, but light leakage may occur
Solution Approach 1:
The patent applies different properties to different regions of the display panel. The transparent region is specifically designed to be transparent to certain wavelengths (allowing optical devices to function), while the surrounding light shielding region maintains its light-blocking properties. This local differentiation of optical properties prevents light leakage from the transparent region while preserving the display function of the rest of the panel.
Solution Approach 2:
The patent introduces a light shielding region as an intermediary structure between the transparent region and the display area. This intermediate light shielding layer prevents light from the backlight module from leaking through the transparent region to the display area, thereby eliminating light leakage issues while maintaining the high screen-to-body ratio enabled by the transparent region.
3Object-generated harmful factors
If the upper polarizer is made continuous, then light leakage is prevented, but the transparent region cannot transmit light for optical devices
Solution Approach 1:
The patent differentiates the polarizer structure between the transparent region and the display region. In the transparent region, the upper polarizer is made transparent (or has a hole) to allow light transmission for optical devices, while in the light shielding region, the upper polarizer remains continuous to prevent light leakage. This local differentiation of polarizer properties simultaneously achieves both light transmission functionality and light leakage prevention.
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
This design increases the screen-to-body ratio by reducing the frame area and enhancing display quality, while ensuring the optical device can directly face the transparent region without occupying lateral space, thus improving the overall appearance and functionality of the electronic device.
Implementation Method 1
A part that is of the liquid crystal box and that is located in the transparent region is configured to allow visible light to pass through
Implementation Method 2
A part that is of the liquid crystal box and that is located in the light shielding region is configured to shield visible light
Implementation Method 3
The lower polarizer continuously covers the transparent region, the light shielding region, and the display region
Data Source
Figure 1~2A
Figure 2B~3
Figure 4~6
AI summary
Implementations of this application disclose a liquid crystal display, including a transparent region, a light shielding region, and a display region. The liquid crystal display includes a liquid crystal box, a lower polarizer, and a backlight module that are sequentially disposed in a stacked manner. A part that is of the liquid crystal box and that is located in the transparent region is configured to allow visible light to pass through, a part that is of the liquid crystal box and that is located in the light shielding region is configured to shield visible light, and a part that is of the liquid crystal box and that is located in the display region is configured to display an image. The lower polarizer covers the display region and is provided with a transparent hole, and a hole wall of the transparent hole is located in the light shielding region. The backlight module includes a bracket, and an inner hole side part of the bracket is located in the light shielding region. The liquid crystal display further includes a light shielding part, the light shielding part is located in the light shielding region and continuously surrounds the transparent region, and the light shielding part is connected to the liquid crystal box, the hole wall of the transparent hole, and the inner hole side part. A screen-to-body ratio of the liquid crystal display is relatively high. Implementations of this application further disclose an electronic device and a liquid crystal display manufacturing method.