Display Panel Aperture Layout for Viewing-Angle Color Deviation
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Solution Overview
Problem
Conventional display panels with fingerprint recognition functions experience color deviation at viewing angles due to increased light exitance at large angles, affecting display performance.
Innovation Solution
A display panel design with a light-shielding layer featuring apertures positioned such that the distance between orthographic projections of the light-emitting layer and apertures satisfies the condition L≥d×sinθn2-sin2θ, where d is the distance between the light-emitting layer and the light-shielding layer, n is the refractive index of a functional film layer, and θ is the visible angle, ensuring light exits outside the visible range and minimizing color deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-shielding layer with apertures is provided to allow reflected light to enter the fingerprint recognition module, then fingerprint recognition function is enabled, but color deviation occurs at large viewing angles due to increased light exitance
Solution Approach 1:
The patent applies local quality by differentiating the functions of different regions in the light-shielding layer. The light-shielding layer includes both apertures (for fingerprint recognition) and light-shielding portions (for preventing color deviation). By making different parts of the light-shielding layer have different properties - some areas transparent for light transmission and others opaque for light blocking - the patent resolves the contradiction between enabling fingerprint recognition and preventing color deviation at viewing angles.
2Ease of operation
If apertures are formed in the light-shielding layer to enable light transmission for fingerprint recognition, then fingerprint recognition is achieved, but the amount of light exiting at large angles increases causing color deviation
Solution Approach 1:
The patent segments the light-shielding layer into functionally distinct regions: apertures for light transmission and fingerprint recognition, and light-shielding portions for blocking light at large angles. This segmentation allows each region to perform its specific function independently - the apertures enable fingerprint recognition while the light-shielding portions prevent color deviation by blocking oblique light rays.
Solution Approach 2:
The light-shielding portions act as an intermediary element between the apertures and the external environment. They mediate the light transmission process by selectively blocking light at large angles while allowing the fingerprint recognition function to operate through the apertures. This intermediary structure prevents the harmful effect of color deviation without compromising the useful function of fingerprint recognition.
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 configuration effectively prevents color deviation within the visible angle range, enhancing user viewing experience by maintaining image clarity across various viewing angles without affecting light intensity within the visible range.
Implementation Method 1
the distance L between the second orthographic projection and at least one first orthographic projection adjacent to the second orthographic projection satisfies L≥d×sinθ/√(n²-sin²θ), where d denotes a distance between the light-emitting layer and the light-shielding layer, n denotes a refractive index of a functional film layer
Data Source
AI summary
Provided is a display panel having a display region and a non-display region, and the display panel includes: a substrate; light-emitting elements disposed at a side of the substrate and located in the display region, each of light-emitting elements includes a light-emitting layer; and a light-shielding layer disposed at a side of the light-emitting elements facing away from the substrate, the light-shielding layer includes first apertures, and in a direction perpendicular to the substrate, each first aperture does not overlap with the light-emitting layer. In an embodiment, a distance between a first point on an edge of a first orthographic projection and a second point on an edge of a second orthographic projection is defined as a distance L, which satisfiesL≥d×sinθn2-sin2θ,where d denotes a distance between the light-emitting layer and the light-shielding layer, n denotes a refractive index of a functional film layer, θ denotes a visible angle and 0°<θ<90°.