Display Panel Anti-Peeping via Segmented Light Emission
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Solution Overview
Problem
Display panels with anti-peeping functions often restrict multiple users from viewing the screen simultaneously, compromising user experience due to the grating structure that narrows the viewing angle, thereby affecting privacy protection.
Innovation Solution
A display panel design incorporating a light-emitting element layer with primary and auxiliary light-emitting elements, where the auxiliary elements are arranged peripherally and covered by a light-shielding layer, allowing for flexible switching between anti-peeping and normal modes by controlling the visibility of light emitted at different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a grating structure is provided on the light-exiting surface to form an anti-peeping film, then privacy protection is improved, but multiple users cannot view the screen simultaneously
Solution Approach 1:
The light-emitting element layer is segmented into primary light-emitting elements and auxiliary light-emitting elements. The primary elements are covered by the light-shielding layer except at opening positions, while auxiliary elements are arranged at periphery and can emit light at large viewing angles. This segmentation allows the display panel to provide both anti-peeping function (through primary elements) and multi-user viewing capability (through auxiliary elements visible at wide angles).
Solution Approach 2:
Different regions of the display panel have different light-emitting characteristics. The central region with primary light-emitting elements provides narrow viewing angle for privacy protection, while the peripheral region with auxiliary light-emitting elements provides wide viewing angle for multi-user viewing. The light-shielding layer is selectively applied to create opening positions that allow primary elements to be visible only at specific angles, while auxiliary elements remain visible at large viewing angles.
2Object-affected harmful factors
If the light-shielding layer covers auxiliary light-emitting elements, then anti-peeping function is achieved, but the auxiliary elements are not visible at normal viewing angles
Solution Approach 1:
The solution transitions from a single viewing angle dimension to multiple angular dimensions. The light-shielding layer with opening positions controls light emission in the vertical angular dimension (perpendicular to screen), allowing primary elements to be visible only at small viewing angles. Meanwhile, auxiliary elements emit light in the horizontal angular dimension (parallel to screen), making them visible at large viewing angles. This dimensional separation resolves the contradiction between anti-peeping function and visibility.
Data Source
AI summary
A display panel including a substrate, a light-emitting element layer, and a light-shielding layer. The light-shielding layer is arranged at a side of the light-emitting element layer facing away from the substrate. In the light-emitting element layer, an auxiliary light-emitting element is arranged at a periphery of the primary light-emitting element. The light-shielding layer includes a first opening corresponding to the primary light-emitting element and a light-shielding part covering the auxiliary light-emitting element. When both the primary light-emitting element and the auxiliary light-emitting element emit light, the viewer at a large viewing angle sees light emitted by the primary light-emitting element and interfering light emitted by the auxiliary light-emitting element; and when the primary light-emitting element emits light and the auxiliary light-emitting element does not emit light, the viewer only sees the light emitted by the primary light-emitting element.