Rear Light-Blocking Film Layout for Bendable Display Panels
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Solution Overview
Problem
External light passing through a display device from its back surface can degrade the image quality displayed on the front surface.
Innovation Solution
A display device design incorporating a light-blocking film layer and a polarizing layer, where the upper surface of the light-blocking film layer directly contacts the lower surface of the display panel, and the polarizing layer's lower surface matches the display panel's upper surface, effectively blocking external light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a display device allows external light to pass through from the back surface, then the structure remains simple, but the image quality displayed on the front surface deteriorates
Solution Approach 1:
A light-blocking film layer is introduced as an intermediary component between the display panel and the external environment. This film layer selectively blocks harmful external light from passing through the back surface while allowing the display to function normally, thus resolving the contradiction between structural simplicity and light interference protection
Solution Approach 2:
The light-blocking film layer is constructed as a composite material structure that combines light-blocking functionality with flexibility and thinness. This composite approach enables the device to maintain simplicity in overall structure while effectively preventing external light from degrading image quality
2Object-affected harmful factors
If the light-blocking film layer covers the entire back surface, then external light blocking is maximized, but the area for light emission is reduced
Solution Approach 1:
The light-blocking film layer is designed with local quality differentiation: it covers the entire back surface area to maximize external light blocking, while the display panel's light emission areas remain unaffected since the film is positioned on the opposite side. This localized approach ensures maximum protection without compromising light emission functionality
Solution Approach 2:
The solution moves the light-blocking function to a different dimension (the back surface) rather than attempting to block light at the front emission surface. By positioning the light-blocking film layer on the rear side of the display panel, the system achieves comprehensive light blocking while preserving the full light emission area of the display
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
Enhances display quality by preventing external light from being recognized, thereby maintaining image clarity and integrity.
Implementation Method 1
a light-blocking film layer disposed under the display panel, where an entirety of an upper surface of the light-blocking film layer directly contacts an entirety of a lower surface of the display panel in the display area
Implementation Method 2
a polarizing layer disposed on the display panel, where an upper surface of the display panel in the display area directly contacts a lower surface of the polarizing layer
Data Source
AI summary
A display device includes a display panel including a display area in which a plurality of pixels is disposed and a bending area bent from the display area, a polarizing layer disposed on the display panel and a light-blocking film layer disposed under the display panel, where an entirety of an upper surface of the light-blocking film layer directly contacts a lower surface of the display panel in the display area, and an area of a lower surface of the light-blocking film layer is smaller than an area of the upper surface of the light-blocking film layer.