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Under display optical fingerprint sensor arrangement for mitigating moire effects

An optical sensor and display technology, applied in the field of optical sensors, can solve problems such as interference with fingerprint characteristics

Pending Publication Date: 2018-08-28
BEIJING JIIOV TECH CO LTD
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  • Summary
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  • Claims
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AI Technical Summary

Problems solved by technology

The combined periodicity of the optical sensor elements and display components can lead to Moiré effects, resulting in parts of the fingerprint image with bright and dark regions, which in turn can interfere with the analysis of fingerprint features such as ridges and valleys

Method used

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  • Under display optical fingerprint sensor arrangement for mitigating moire effects
  • Under display optical fingerprint sensor arrangement for mitigating moire effects
  • Under display optical fingerprint sensor arrangement for mitigating moire effects

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Embodiment Construction

[0020] The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary, brief description of the drawings, or the following detailed description.

[0021] An optical fingerprint sensor for under-display use is described. The display has a periodic structure corresponding to the pitch of the individual display pixels and sub-pixels. Optical fingerprint sensors also have periodic structures that correspond to the pitch of individual sensor pixels or elements. One solution is to design the optical fingerprint sensor such that all sensor elements fall directly under openings in the display, eg under areas of the display that are not occupied by display pixels. However, it is difficult to design the sensor to exactly match the opening in the ...

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Abstract

The invention provides an under display optical fingerprint sensor arrangement for mitigating moire effects. A system and method for an electronic device for imaging a biometric object having structural features of interest is disclosed. The electronic device includes a display including rows of pixel elements, the rows of pixel elements being parallel a first primary direction along a first axisand an optical sensor mounted underneath the display, the optical sensor being parallel to a second primary direction along a second axis. The second axis is rotated at an angle relative the first axis to adjust a moire pattern outside of a frequency range of the features of interest.

Description

technical field [0001] The present disclosure relates generally to optical sensors, and more particularly to an under-display optical fingerprint sensor arrangement that mitigates the moiré effect. Background technique [0002] Object imaging is used in a variety of applications. For example, a biometric identification system images a biometric object for use in identifying and / or authenticating a user of a device that includes the identification system. Biometric imaging provides a reliable, non-invasive way to verify an individual's identity for identification purposes. Various types of sensors can be used for biometric feature imaging. [0003] Fingerprints, like other biometric features, are based on unique personal characteristics and thus provide a reliable mechanism for identifying individuals. Therefore, fingerprint sensors have many potential applications. For example, fingerprint sensors can be used to provide access control in stationary applications such as s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1359G06V40/13G06V40/1318
Inventor B.L.麦基R.J.格罗夫
Owner BEIJING JIIOV TECH CO LTD
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