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Use InfraRed sensor to trigger mobile phone vibrate mode

IP.com Disclosure Number: IPCOM000198179D
Publication Date: 2010-Jul-29
Document File: 4 page(s) / 110K

Publishing Venue

The IP.com Prior Art Database

Abstract

The key idea of this invention is to use passive infrared sensor to detect if there is human body around to automatically decide which phone mode: "Meeting" vibrate mode or "Normal" ring mode should be selected.

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Use InfraRed sensor to trigger mobile phone vibrate mode

Background

Human bodies are very good infrared sources. The temperature of a typical human body is about 37 ℃, to estimate human body radiation of heat to their environment; the Stefan-Boltzman's Law can be used [1]. The average human frame radiates about 100 W/㎡of power (

wavelength of

able to detect humans [3].

Recently, passive pyroelectric infrared sensors have been used for a wide range of applications such as intruder detection , light actuators, and auxiliary sensing. But infrared detector doesn't be applied in mobile.

A passive infrared sensor is designed in this disclosure to be used to detect temperature of human body by mobile phone

                                                                             . The output of PIR circuit will trigger to change profiles of mobile phone correspondingly to make sure user can catch all coming call .

Problems

Scenario 1: In office, mobile phone and telephone rings one after another. It make our office so noisy.

Scenario 2: User A just came back from a meeting, he has set his mobile profile to "meeting" mode during the meeting. But he forgot to change back to ring mode. He put it in his drawer then work hard on his computer. He has a coming call soon, mobile is vibrated but he didn't heard. He missed an important coming call from his customer.

Scenario 3: User B is on her way home. She is on bus with her handbag. Her phone is in vibrate mode since she always set it to vibrate mode in office. When she got back home, she take her phone out to check and find she missed so much coming calls.

Scenario 4: User C is in an important negotiation. He put his cell-phone at his hand. His mobile rings suddenly. He is so embarrassed and change his mobile profile manually.

Solution

The main solution in this disclosure is to use passive infrared sensor to detect if there is human body around to automatically decide which phone mode: "Meeting" vibrate mode or "Normal" ring mode should be selected.

1

9 - 10ìm ) [2]. Infrared detectors that are sensitive in a range of 8~14ìm

would thus be

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This disclosure take advantage of the PIR can detect human by accepting infrared radiated by human body . If there is obstructer ahead of PIR, it can detect nothing.

Following graph is the main design a...