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Noise filtering method of tof module, tof module and device

A technology of noise filtering and module, applied in the field of electronics, can solve the problems of complexity, high cost, affecting the overall space setting of the device, etc., to achieve the effect of improving the measurement accuracy and eliminating the impact

Active Publication Date: 2022-03-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the use of the first method will affect the consistency of the appearance of the device, and the assembly of two cover plates is more complicated than one cover plate, requiring separate coating, and the cost is high; the use of the second method will affect the overall space setting of the device

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  • Noise filtering method of tof module, tof module and device
  • Noise filtering method of tof module, tof module and device
  • Noise filtering method of tof module, tof module and device

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Embodiment Construction

[0046] In order to understand the characteristics and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present application.

[0047] The noise filtering method of a TOF module provided in the embodiment of the present application is based on the principle of TOF ranging,

[0048] Figure 4 It is a schematic diagram of window switching mode inside a pixel, such as Figure 4 As shown, after the transmitting unit emits the outgoing light signal, the outgoing light signal is reflected by the target object to form reflected light and enters the receiving unit. Each pixel at the receiving end is composed of a photosensitive unit (such as a photodiode), which can The incident light is converted ...

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Abstract

The embodiment of the present application discloses a noise filtering method of a TOF module, a TOF module and a device. The method includes: controlling the emitting unit to emit an outgoing optical signal; controlling the receiving unit to receive an incident optical signal; wherein, the The incident light signal at least includes: the target incident light formed by the reflection of the target shooting object, and the non-target incident light that introduces the noise signal; the receiving unit is controlled to convert the incident light signal into an electrical signal; wherein, the The electrical signal at least includes: a target electrical signal corresponding to the target incident light, and the noise signal corresponding to the non-target incident light; filtering the noise signal in the electrical signal based on the noise filtering unit, Obtain the target electrical signal. In this way, the effective target electrical signal is used to realize the depth measurement, which can improve the measurement accuracy and eliminate the influence of the noise signal on the depth measurement.

Description

technical field [0001] The present application relates to electronic technology, and in particular to a noise filtering method for a time of flight (Time Of Flight, TOF) module, a TOF module and a device. Background technique [0002] The TOF module calculates the distance between the external shooting object and the camera by measuring the flight time of the emitted optical signal in space. figure 1 The principle of TOF module ranging is shown in , and the TOF module includes a transmitting unit, a receiving unit, a modulating unit, a demodulating unit and a processor. Among them, the modulation unit is responsible for modulating the emitted infrared light, and emits the infrared light through the transmitting unit; the receiving unit receives the reflected light reflected by the surface of the photographed object, and the demodulation unit is responsible for demodulating the reflected light received by the receiving unit; signal processing The module includes an analog-to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/487
CPCG01S7/4802G01S7/4876
Inventor 王路
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD