Photosensitive image element, image collector, fingerprint collection device and display device

Abstract

The embodiment of the invention discloses a photosensitive image element, an image collector, a fingerprint collection device and a display device supporting a collection function. The photosensitive image element comprises a cavity for holding a photovoltaic conversion unit, the upper portion of the cavity is coated with a light-blocking film with a light transmission pin hole, and the upper portion of the light-blocking film is provided with a transparent dielectric layer and a micro lens in order. The micro lens, the transparent dielectric layer and the light transmission pin hole allow the photosensitive image element to have an object space field for limiting an angle of visual field, image points or image spot of the object points located in the object space field are arranged in the light transmission pin hole of the light-blocking film; and the image points or the image spots of the object points located at the external portion of the object space field are arranged at the external portion of the light transmission pin hole. The pin hole on the light-blocking film and the micro lens are configured to restrain an incident light path to allow the photosensitive image element to have a narrow field of view, the image collector based on the photosensitive image element with the narrow field of view cannot longer depend on a lens system or a pinhole imaging to restrain the incident light path to allow thinning of a sharp image to be possible while obtaining the sharp image through the image collection device so as to facilitate integration with other devices.

Description

technical field [0001] The invention relates to the technical field of image collection, in particular to a photosensitive pixel with a narrow field of view, an image collector and an optical fingerprint collection device using the photosensitive pixel. Background technique [0002] The smallest unit for receiving light signals in an image collector is a photosensitive pixel, and several photosensitive pixels are usually set in the image collector. The photosensitive pixels used by image collectors on the market all have a wide field of view. The viewing angle of a photosensitive pixel refers to the maximum angle formed by the photosensitive pixel that can respond to incident light from different directions. figure 1 A schematic diagram showing the field of view angle of the photosensitive pixel in the existing image collector. Such as figure 1 As shown, the field angle of the photosensitive pixel 01 on the existing image collector is close to 180 degrees, that is, the ma...

AI Technical Summary

Problems solved by technology

For the increasingly ultra-thin forms and requirements of existing electronic equipment, image acquisition equipment with a thicker thickness cannot meet the requirements of manufacturers. The image acquisition equipment that can obtain clear images and meet the production requirements

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