Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for over-temperature protection of terminal flash lamp

An over-temperature protection and flashlight technology, applied in lighting devices, lamp circuit layout, light source and other directions, can solve problems such as damage to the flashlight, impact on service life, and inability to monitor the temperature of the flashlight, so as to increase the service life and eliminate individual differences.

Inactive Publication Date: 2015-08-12
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, mobile phones generally do not have the function of temperature detection of the flash, and the mobile phone will not prompt the user when the temperature of the flash is overheated. Now the space of the motherboard of the mobile phone is getting tighter, and the heat dissipation space for the flash is getting smaller and smaller. The heat dissipation of the flash is problematic. It will become more and more serious; because if the flash works at high temperature for a long time, the service life will be affected, and the flash may be seriously damaged; although the general flash driver chip has built-in over-temperature protection function, but the driver chip overheat The temperature protection function is only a temperature protection for the driver chip itself, it cannot monitor the temperature of the flash and protect it

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for over-temperature protection of terminal flash lamp
  • Method and device for over-temperature protection of terminal flash lamp
  • Method and device for over-temperature protection of terminal flash lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Please refer to figure 1 , which is a flow chart of the method for overtemperature protection of the flashlight 30 of the terminal provided in the first embodiment. The method of this embodiment is mainly applied to various terminals, including mobile phones, e-book readers, MP3 (Moving Picture Experts Group Audio Layer III, moving picture experts compression standard audio level 3) players, MP4 (Moving Picture Experts Group Audio Layer IV, Motion Picture Expert Compression Standard Audio Level 4) Players, Laptops, Tablets, etc. The method includes:

[0065] S101. Presetting the threshold value ΔV of the over-temperature protection of the flash lamp 30 F .

[0066] The flash 30 is a light-emitting diode, which is essentially a diode. According to the temperature characteristics of the diode, as the temperature rises, the volt-ampere (IF / VF) characteristic curve of the diode will shift to the left, that is, for a certain operating current, the higher the temperature ...

Embodiment 2

[0095] The difference between this embodiment and Embodiment 1 lies in that the acquisition method of the reference voltage adopted in this embodiment is different. The method of this embodiment is mainly applied to various terminals, including mobile phones, e-book readers, MP3 (Moving Picture Experts Group Audio Layer III, moving picture experts compression standard audio level 3) players, MP4 (Moving Picture Experts Group Audio Layer IV, Motion Picture Expert Compression Standard Audio Level 4) Players, Laptops, Tablets, etc. The method includes:

[0096] S101. Presetting the threshold value ΔV of the over-temperature protection of the flash lamp 30 F .

[0097]The flash 30 is a light-emitting diode, which is essentially a diode. According to the temperature characteristics of the diode, as the temperature rises, the volt-ampere (IF / VF) characteristic curve of the diode will shift to the left, that is, for a certain operating current, the higher the temperature , the sma...

Embodiment 3

[0131] Please refer to Figure 4 , Figure 4 It is a device structure diagram of the over-temperature protection of the flashlight 30 of the terminal provided by the third embodiment.

[0132] The device of this embodiment is set or applied to a terminal, and the method of Embodiment 1 or Embodiment 2 can be executed by using this device, so as to realize the over-temperature protection of the flashlight of the terminal. The device uses or applies certain hardware or software of the terminal, including mobile phones, e-book readers, MP3 (Moving Picture Experts Group Audio Layer III, moving picture experts compression standard audio layer 3) players, MP4 (Moving Picture Experts Group Audio Layer IV, dynamic image experts compress standard audio layer 4) Players, laptops, tablets, etc. The device includes: a main control chip 10 , a driver chip 20 and a memory 40 .

[0133] The main control chip 10 includes: a threshold setting unit 11 , a voltage sampling unit 12 , a referen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an over-temperature protection method and device of a flashlight of a terminal. The over-temperature protection method comprises the steps of obtaining a reference voltage V0 of the flashlight, storing the reference voltage V0 into a storage of the terminal, monitoring and recording the current actual work voltage Vs of the flashlight in real time when the flashlight works, judging whether the value of V0-Vs is larger than delta VF or not, if yes, controlling a driving chip to turn off the flashlight, if not, permitting the flashlight to work continuously, and continuing monitoring and recording the current actual work voltage of the flashlight. The over-temperature protection method and device of the flashlight of the terminal utilize the temperature characteristic of the flashlight and monitor the temperature by sampling the voltage of the flashlight, additional arrangement of temperature sensors is not needed, the purpose of protecting the flashlight and the driving chip is achieved, and the service life of the flashlight is prolonged.

Description

technical field [0001] The invention relates to the field of temperature monitoring of electronic devices, in particular to a method and device for over-temperature protection of a terminal flash lamp. Background technique [0002] Now the camera function has become more and more important for mobile phones, and even now the camera function of some mobile phones can be compared with ordinary card machines. Therefore, the user experience of the camera function is particularly important, and one of the more important items is the effect of taking pictures and imaging under low-light conditions. As a result, more phones are now equipped with a flash for better imaging. [0003] The core component that works with the flashlight is a driver chip, which converts the battery voltage into the voltage required by the flashlight, and transmits signals through I2C and mobile phones to control whether the flashlight is on or not, and which mode it is on . General flash driver chips h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 洪军可
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com