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Phase calibration method and electronic equipment

An electronic device and phase calibration technology, applied in the field of communication, can solve problems such as abnormal interruption of MIPI communication, and achieve the effect of improving stability

Active Publication Date: 2020-05-15
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a phase calibration method and electronic equipment to solve the problem of abnormal interruption of MIPI communication due to the phase shift between the clock signal CLK and the data signal DATA

Method used

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  • Phase calibration method and electronic equipment
  • Phase calibration method and electronic equipment
  • Phase calibration method and electronic equipment

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Experimental program
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Embodiment 1

[0037] see figure 1 , which shows a flowchart of a phase calibration method provided by Embodiment 1 of the present invention, which is applied to electronic equipment, and the method includes:

[0038] Step 101. Obtain a phase value of a clock signal of a camera sensor of the electronic device.

[0039] The phase calibration method in the embodiment of the present invention can be applied to electronic equipment, and the camera sensor of the electronic equipment uses a MIPI-DPHY interface. Described electronic equipment specifically includes but is not limited to: smart phone, panel computer, e-book reader, MP3 (moving picture expert compression standard audio level 3, Moving Picture Experts Group Audio LayerIII) player, MP4 (moving picture expert compression standard audio Layer 4, Moving Picture Experts GroupAudio Layer IV) player, laptop portable computer, car computer, desktop computer, set-top box, smart TV, wearable device, etc.

[0040] In the embodiment of the prese...

Embodiment 2

[0084] For the first case, this embodiment describes in detail the specific process of calibrating the phase value of the clock signal of the camera sensor of the electronic device.

[0085] In an optional embodiment of the present invention, the obtaining the clock signal phase value of the camera sensor of the electronic device in step 101 includes: obtaining the phase value of the camera sensor when the connection status of the MIPI is abnormal. The phase value of the clock signal; the working state of the MIPI changes, specifically referring to the change of the connection state of the MIPI from abnormal to normal.

[0086] For the first case of the embodiment of the present invention, when the camera has a functional failure, and the CPU of the electronic device receives an MIPI communication abnormal interruption (or MIPI communication error prompt), that is, in the connection state of the MIPI If it is abnormal, the phase value of the clock signal of the camera sensor o...

Embodiment 3

[0102] For the second case, this embodiment describes in detail the specific process of calibrating the phase value of the clock signal of the camera sensor of the electronic device.

[0103] In an optional embodiment of the present invention, the obtaining the clock signal phase value of the camera sensor of the electronic device in step 101 includes: obtaining the phase value of the camera sensor when the connection status of the MIPI is normal. The phase value of the clock signal; the working state of the MIPI changes, specifically referring to the change of the connection state of the MIPI from normal to abnormal.

[0104] For the second case of the embodiment of the present invention, when the CPU of the electronic device does not receive the MIPI communication abnormal interruption (or MIPI communication error prompt), that is, when the connection status of the MIPI is normal , to acquire the phase value of the clock signal of the camera sensor of the electronic device. ...

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Abstract

The embodiment of the invention provides a phase calibration method and electronic equipment. The method comprises the following steps: acquiring a clock signal phase value of a camera sensor of the electronic equipment; gradually adjusting the clock signal phase value according to a first direction by taking a first variable quantity as a step length, and judging whether the working state of a mobile industry processor interface (MIPI) of the camera sensor is changed or not after the clock signal phase value is adjusted each time; wherein the change of the working state of the MIPI comprisingthe change of the connection state of the MIPI from a normal state to an abnormal state or the change of the connection state of the MIPI from the abnormal state to the normal state; if the working state of the MIPI is changed, determining the clock signal phase value at the moment as a first phase value; determining a target phase value according to the first phase value; and determining the clock signal phase of the camera sensor as the target phase value. According to the embodiment of the invention, the clock signal phase value of the camera sensor can be automatically optimized.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a phase calibration method and electronic equipment. Background technique [0002] MIPI (Mobile Industry Processor Interface, Mobile Industry Processor Interface) DPHY is a standard universal interface for mobile industry processor interfaces. At present, the MIPI-DPHY interface is widely used in mobile phone camera image sensors and is used to transmit image data. The DPHY interface consists of CLK lane (clock signal channel) and DATAlane (data signal channel). Both CLK lane and DATAlane are differential signals, namely CLK lane is composed of positive edge clock signal CLKP and negative edge clock signal CLKN. DATAlane is composed of positive edge data signal DATAP and negative edge data signal DATAN. ​​The data reading adopts double-edge sampling, that is, both rising and falling edges of CLK Sampling data, one CLK edge, read the level of DATA once, and sample data twi...

Claims

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Application Information

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IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 吕宗安
Owner VIVO MOBILE COMM CO LTD