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Noise filtering method and device of TOF module and TOF module

A noise filtering and module technology, applied in the electronic field, can solve the problems of affecting the appearance consistency of the device, affecting the overall space setting of the device, and high cost

Active Publication Date: 2019-11-26
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

Method used

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  • Noise filtering method and device of TOF module and TOF module
  • Noise filtering method and device of TOF module and TOF module
  • Noise filtering method and device of TOF module and TOF module

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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 invention discloses a noise filtering method and device of a TOF module and a TOF module. The method comprises the following steps: controlling a transmitting unit to transmit anemergent light signal; controlling a receiving unit to receive an incident light signal at least including target incident light formed by reflection of a target shooting object and non-target incident light with introduction of a noise signal; controlling the receiving unit to convert the incident light signal into an electric signal at least including a target electric signal corresponding to the target incident light and the noise signal corresponding to the non-target incident light; and filtering the noise signal in the electric signal based on a noise filtering unit to obtain a target electric signal. Therefore, depth measurement is realized by utilizing the obtained effective target electric signal, thereby improving the measurement precision and eliminating the influence of a noise signal on 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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IPC IPC(8): G01S7/487
CPCG01S7/4802G01S7/4876
Inventor 王路
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD