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Camera-module-based ambient light monitoring method

A camera module and ambient light technology, applied in the field of ambient light monitoring, can solve the problems of adding additional light transmission holes, increasing the difficulty of mold opening, increasing the complexity of layout, etc.

Active Publication Date: 2012-07-18
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] At present, the known ambient light detection applied to mobile phones is realized by special photosensitive devices and circuits; this method needs to increase the cost of additional devices and design circuits; at the same time, the structure also needs to add additional light-transmitting holes, which increases the difficulty of mold opening ;The circuit board PCB adds extra space for placing devices, increasing the complexity of the layout

Method used

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  • Camera-module-based ambient light monitoring method
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  • Camera-module-based ambient light monitoring method

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Embodiment Construction

[0025] At first, explain core and key of the present invention:

[0026] The present invention is based on the exposure of the sensor, and further uses the data output by the sensor to do a brightness detection application. To realize this application, it must first ensure that the exposure of the sensor is fixed, that is, prohibit the AE and automatic white balance AWB of the sensor itself Function; ensure that the exposure time is fixed and the digital gain is fixed in the exposure environment. The invention utilizes the photosensitive function of the camera to realize the ambient light detection method.

[0027] Second, describe in detail in conjunction with specific embodiments of the present invention applied to mobile phones, the following camera equipment corresponds to the camera module:

[0028] Such as figure 1 As shown, the ambient light detection application program on the mobile phone of the specific embodiment of the present invention includes:

[0029] 101) F...

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Abstract

The invention relates to a camera-module-based ambient light monitoring method, which comprises: fixedly setting the exposure time and digital gain of a camera module; and receiving, counting and processing exposure data of the camera module to acquire a brightness value. The camera-module-based ambient light monitoring method can be used for monitoring the brightness of ambient light without anyextra hardware on the basis of the conventional camera module, and is particularly applicable to compact equipment such as mobile phones.

Description

technical field [0001] The invention relates to ambient light monitoring, in particular to an ambient light monitoring method based on a camera module, especially applied to mobile phones. Background technique [0002] At present, the known ambient light detection applied to mobile phones is realized by special photosensitive devices and circuits; this method needs to increase the cost of additional devices and design circuits; at the same time, the structure also needs to add additional light-transmitting holes, which increases the difficulty of mold opening ; The circuit board PCB adds additional space for placing devices, increasing the complexity of the layout. The control method of the automatic exposure control device AE of the current camera generally adopts the method of analog and digital simultaneous control. For example, if the current exposure is not enough, the sensor internally increases the analog gain (that is, the exposure time) and the digital gain to reach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/235G03B7/08
Inventor 蓝和杨鑫裴广宇
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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