Photosensitive Device Lens Array Uniformity Using Dummy Pinhole
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Solution Overview
Problem
Existing photosensitive devices face issues of uneven shape and distribution of lenses and pinholes, leading to inconsistent performance and reliability.
Innovation Solution
Incorporating a dummy lens and dummy pinhole arrangement in the photosensitive device, ensuring even distribution and shape consistency of lenses and pinholes through the use of a collimator layer and lens array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lenses and pinholes are arranged in the photosensitive device, then light concentration and sensing performance are improved, but the shape uniformity and distribution consistency of lenses and pinholes deteriorate due to manufacturing irregularities
Solution Approach 1:
The patent applies homogeneity by ensuring that all lenses have identical curvature radii and all pinholes have identical diameters. The collimator layer is designed with uniformly distributed pinholes, and the lens array is configured with lenses of consistent size and shape. This uniformity in structural parameters across all components directly addresses the manufacturing precision issue while maintaining reliable sensing performance.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the collimator layer and lens array with predetermined, uniform geometric parameters before the manufacturing process. The pinhole array is designed with specific pitch and diameter values, and the lens array is configured with predetermined curvature radii and spacing. This pre-planned uniformity compensates for potential manufacturing variations by establishing a consistent baseline structure.
2Use of energy by moving object
If a collimator layer with pinhole array and lens array are added to concentrate light, then light concentration efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the collimator layer with pinhole array and the lens array into a single integrated optical system. The collimator layer is positioned directly above the photosensitive component, and the lens array is arranged immediately above the collimator layer, creating a compact combined structure. This integration achieves effective light concentration while minimizing the overall device footprint and reducing structural complexity.
Solution Approach 2:
The patent utilizes the vertical dimension by stacking the photosensitive component, collimator layer with pinholes, and lens array in a layered configuration along the first direction. This vertical arrangement allows light to pass through multiple functional layers in sequence, achieving concentration efficiency while maintaining a compact horizontal footprint, thus managing device complexity effectively.
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
Improves the uniformity of lens and pinhole shapes and sizes, enhancing the device's performance and reliability by addressing irregularities in the manufacturing process.
Implementation Method 1
the light will be reflected by the user's finger, and then the light will enter the photosensitive devices under the display panel. The photosensitive components in the photosensitive devices receive the light and generate signals. In some photosensitive devices, the light is better concentrated on the photosensitive components by the arrangement of lenses.
Implementation Method 2
The first collimator layer is located above the first photosensitive component and has a first pinhole array
Data Source
AI summary
A photosensitive device includes a first photosensitive unit, a first collimator layer, a first lens, and a first dummy lens. The first photosensitive unit includes a first photosensitive component and a first control circuit. The first control circuit is electrically connected to the first photosensitive component. The first collimator layer is located above the first photosensitive component and has a first pinhole and a first dummy pinhole. The first lens is located above the first collimator layer and overlapping with the first photosensitive component and the first pinhole in a first direction. The first dummy lens is located above the first collimator layer and overlapping with the first dummy pinhole in the first direction.