Display substrate, method for manufacturing same, and display device
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Solution Overview
Problem
The quality of images acquired by cameras in full-screen display devices is poor due to direct light emission from the display substrate entering the camera's light incident surface, which affects the screen-to-body ratio when attempting to increase the opening size for better light incidence.
Innovation Solution
A display substrate with a multilayered functional film layer and a light-shielding film on the side wall of the opening, where the opening size gradually increases and may include sub-openings, prevents direct light emission from entering the camera by blocking it with a metal or non-metal light-shielding film, maintaining the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the opening size is increased to improve light incidence for the camera, then the image quality is improved, but the screen-to-body ratio is reduced
Solution Approach 1:
The patent transitions from a two-dimensional opening problem to a three-dimensional solution by adding a light-shielding film on the side wall of the opening. This vertical dimension approach allows light to pass through the opening while blocking direct light from the display substrate, resolving the contradiction between opening size and screen-to-body ratio.
Solution Approach 2:
The light-shielding film acts as an intermediary element between the display substrate and the camera. It selectively blocks harmful direct light while allowing necessary ambient light to reach the camera through the opening, thereby improving image quality without requiring a larger opening.
2Measurement precision
If a light-shielding film is added to block direct light, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent employs a thin film light-shielding layer deposited on the side wall of the opening. This thin film approach blocks direct light effectively while adding minimal structural complexity and maintaining a compact device design.
Solution Approach 2:
Instead of increasing the horizontal opening size, the solution moves to the vertical dimension by coating the side wall. This dimensional shift provides an elegant and simple way to block light without complicating the overall device structure.
3Use of energy by moving object
If the opening size is increased to allow more ambient light, then camera performance is improved, but the display substrate area is reduced
Solution Approach 1:
The light-shielding film is applied locally and selectively on the side wall of the opening, specifically targeting the path of direct light from the display substrate. This localized treatment allows maximum ambient light entry while blocking only the harmful direct light, optimizing camera performance without reducing display substrate area.
Solution Approach 2:
The light-shielding film serves as a selective mediator that distinguishes between useful ambient light (which should pass through) and harmful direct light (which should be blocked). This selective mediation enables small opening sizes to achieve optimal camera performance.
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
The solution effectively enhances image quality by blocking light from the display substrate without increasing the opening size, thus preserving the screen-to-body ratio and ensuring high image quality for cameras in display devices.
Implementation Method 1
a light-shielding film on a side wall of the opening... blocking light from the display substrate without increasing the opening size
Data Source
AI summary
Disclosed are a display substrate, a method for manufacturing the same, and a display device. The display substrate includes: a base substrate, and a multilayered functional film layer on the base substrate. The multilayered functional film layer is provided with an opening penetrating through the multilayered functional film layer. A light-shielding film is on a side wall of the opening.