CN103841263A

CN103841263A - Distance sensor scheme achieved based on CTP

Info

Publication number: CN103841263A
Application number: CN201410054410.4A
Authority: CN
Inventors: 赵进; 王玉路; 杜旭; 彭广溢
Original assignee: Shanghai Chinapalms Communication Technology Co Ltd
Current assignee: Shanghai lucky Communication Technology Co., Ltd.
Priority date: 2014-02-18
Filing date: 2014-02-18
Publication date: 2014-06-04

Abstract

The invention discloses a distance sensor scheme achieved based on a CTP. The distance sensor scheme is characterized by comprising the following the steps that A, the CTP is initialized; B, two input devices are established for a TP and a PS respectively; C, a PS control node is established; D, the CTP is in the touch mode; E, whether a call comes in or not is judged, if yes, the step F is executed, and if not, the step D is executed; F, whether the CTP is in the PS working state or not is judged, if yes, the step H is executed, and if not, the step D is executed; H, whether the CTP is close to or away from the face is judged, if the CTP is close to the face, an LCD is in the dark state, and if the CTP is away from the face, the LCD is awakened; G, communication is finished, and the step D is executed again. A novel software control system is provided, the CTP can achieve practicability of man-machine interaction between a user and a mobile phone terminal and can also simulate the distance sensing function during phone communication, and the cost of the whole mobile phone is reduced.

Description

A kind of range sensor scheme realizing based on CTP

Technical field

The present invention relates to a kind of based on CTP(capacitance touch screen) the range sensor scheme that realizes.

Background technology

Current, smart mobile phone all adopts CTP touch-screen to be used as man-machine inputting equipment, and for avoiding in communication process because facial contact CTP causes false triggering problem, design is to increase the problem that range sensor is evaded false triggering conventionally.Generally, design is to use digital Distance sensor chip, and the method can more effectively be evaded the problem of CTP false triggering, and shortcoming is that mainboard needs the extra chips that increases, and chip selection is RPR400, and design cost increases by 0.3 dollar; In addition, this scheme also requires very high to structure seal, need to rationally open loophole with a black gum cover and CTP and evade range sensor transmitting-receiving optical crosstalk and cause malfunctioning problem, generally, the cost of gum cover is 0.02 dollar, and CTP opens 0.15 dollar of loophole cost.The complete machine cost increase that uses traditional range sensor scheme to introduce is 0.47 dollar.At some, for the very responsive low order complete machine scheme of cost, the cost that traditional range sensor scheme increases is very large to complete machine cost impact, so, as why not increased design cost, also can realize range sensor scheme.

Summary of the invention

The object of the present invention is to provide a kind of range sensor scheme realizing based on CTP touch-screen, substituted traditional infrared apart from inductive scheme, reduced mobile phone overall design cost.

To achieve these goals, technical scheme of the present invention is as follows: a kind of range sensor scheme realizing based on CTP touch-screen, is characterized in that this scheme comprises the following steps: A, CTP initialization; B, two input equipments of establishment, respectively for TP and PS; C, establishment PS control node; D, CTP enter touch mode; E, judged whether incoming call or call out, if enter F, enter if not D; F, judge whether CTP enters PS operating conditions, enter in this way H, as otherwise D; H, judge TCP be approach or leave face, as approach face LCD enter the screen state that goes out, as leave face change wake up LCD; G, end of conversation, enter D.

The variation of method for designing based on CTP capacitance herein, in communication process, by the pattern recognition CTP that determined whether facial contact, realizes the function of simulated range transducer with this.Specifically, under normal conditions, user is in the time of operation CTP, and just one or several is pointed, and scope is less, can think the contact event of a small size; And in communication process, human face and CTP contact area are very large, it is a large-area contact event.Because of the difference of two kinds of contact events, the variation of the CTP capacitance of initiation has larger difference, by this method, CTP is switched to different mode of operation (touch mode of operation and distance perspective and answer mode of operation).

On software, after removing range sensor equipment, in Android systems soft ware, just lack the control logic that distance perspective is answered, therefore, CTP equipment is invented to two virtual input devices (linux input equipment), guarantee that two virtual units all normally work, and do not occur phase mutual interference.The design's method provides a kind of software control system of novelty, allows CTP can meet the practicality of user and mobile phone terminal man-machine interaction, again can be in the time making a phone call simulated range inducing function, reduced the complete machine cost of mobile phone.

Accompanying drawing explanation

Fig. 1 is the flow chart of the specific embodiment of the invention.

Embodiment

Remarks: for convenience of style of writing, below range sensor-Proximity Sensor be abbreviated as PS, touch-screen-Touch Panel is abbreviated as TP.

The design's method, based on Android system, needs to change kernel(kernel) drive and HAL(hardware abstraction layer).

Following according to flow chart, method for designing is described further.

First 3 work in the middle of Kernel, have been needed

1, CTP starts initialization, complete power on, the action such as RST;

2,, in CTP facility registration, register two input equipment, respectively for TP and PS simultaneously;

3, be that PS equipment creates one and controls node, call for HAL, be used for opening, closing PS.

After Kernel phased mission completes, HAL can start the work that adapter state switches.Each user's start, TP starts to enter normal touch mode of operation.In use procedure, if any incoming call or call, HAL layer can call PS and control node, starts to allow the work of PS virtual unit, and then whether CTP enters PS operating conditions (for example loud speaker call mode, PS just can not be activated) according to condition judgment.

As entered PS operating conditions, human face is as close CTP, and LCD enters the screen state that goes out, and reduces power consumption; When people's ear leaves CTP, LCD can be waken up, normal display frame.So repeatedly, until end of conversation, CTP exits PS operating conditions, comes back to touch mode of operation.

By Kernel, the cooperation in two stages of HAL, whole virtual unit just can normally be worked.Due to method simple practical, this design is suitable for most CTP on Vehicles Collected from Market.

Claims

1. the range sensor scheme realizing based on CTP touch-screen, is characterized in that this scheme comprises the following steps: A, CTP initialization; B, two input equipments of establishment, respectively for TP and PS; C, establishment PS control node; D, CTP enter touch mode; E, judged whether incoming call or call out, if enter F, enter if not D; F, judge whether CTP enters PS operating conditions, enter in this way H, as otherwise D; H, judge TCP be approach or leave face, as approach face LCD enter the screen state that goes out, as leave face change wake up LCD; G, end of conversation, enter D.