Display Device Back Plate Layer Thickness Reduction

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Solution Overview

Problem

The existing display devices have a thicker thickness due to the arrangement of multiple supporting layers, which affects their slimness and reliability.

Innovation Solution

A display device design that includes a back plate layer made of black light-shielding material, where the first back plate is directly attached to a rigid supporting layer, eliminating the need for a separate buffer and light-shielding layer, thereby reducing the overall thickness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If multiple supporting layers (first back plate, buffer layer, rigid supporting layer, second back plate) are arranged at the back side of the flat plate, then the display device has excellent structural support and flat surface maintenance, but the display device thickness increases

Engineering Contradiction:
Improvestructural supportVSAvoiddisplay device thickness
Core Design Contradiction:
StrengthVSLength of stationary object

Solution Approach 1:

The patent combines the buffer layer and light-shielding layer into a single integrated layer. The buffer layer is made of black foam material that simultaneously provides mechanical buffering against external forces and light-shielding functionality, eliminating the need for separate buffer and light-shielding layers and reducing overall device thickness

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The buffer layer is designed to perform multiple functions: it acts as a mechanical buffer to absorb external forces and impacts, serves as a light-shielding layer to prevent light leakage, and provides structural support. This multi-functional design reduces the number of separate layers needed while maintaining device performance

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Shape

If multiple supporting layers are arranged at the back side of the flat plate, then the display device maintains flat surface quality, but the device becomes thicker and heavier

Engineering Contradiction:
Improveflat surface qualityVSAvoiddisplay device thickness
Core Design Contradiction:
ShapeVSLength of stationary object

Solution Approach 1:

The patent merges the buffer layer and light-shielding layer into one integrated component. The black foam material of the buffer layer inherently provides both mechanical buffering and optical shielding properties, allowing the device to maintain flat surface quality with reduced thickness

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If a separate buffer and light-shielding layer is placed between the back plate and rigid supporting layer, then the device has good impact resistance, but the overall thickness increases

Engineering Contradiction:
Improveimpact resistanceVSAvoiddisplay device thickness
Core Design Contradiction:
ReliabilityVSLength of stationary object

Solution Approach 1:

The patent integrates the buffer and light-shielding functions into a single buffer layer made of black foam material. This layer is positioned between the back plate and rigid supporting layer, providing both impact resistance and light shielding in one component, thereby reducing the number of layers and overall device thickness

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS12310220B2Display device and display terminal
Publication Date: 2025.05.20 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
  • US12310220B2 patent drawing
  • US12310220B2 patent drawing
  • US12310220B2 patent drawing

AI summary

Embodiments of the present application provide a display device and a display terminal. By arranging a back plate layer with a black light-shielding function, the back plate layer and a buffer and light-shielding layer are combined as one. The back plate includes a first back plate, and the first back plate is directly attached to a rigid supporting layer. The buffer and light-shielding layer is not required. As such, a thickness of the display device can be reduced, so that the display device is lighter and thinner.