CN205105003U

CN205105003U - Wisdom family terminal

Info

Publication number: CN205105003U
Application number: CN201520950187.1U
Authority: CN
Inventors: 袁朝朋; 李擘
Original assignee: CHENGDU SANOFI ELECTRICAL Co Ltd
Current assignee: CHENGDU SANOFI ELECTRICAL Co Ltd
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2016-03-23
Anticipated expiration: 2025-11-25

Abstract

The utility model discloses a wisdom family terminal, including power, data acquisition module, wireless communication module, relay, touch panel module, remote terminal, host system, gather data by data acquisition module and give remote terminal through host system analysis processes, the data behind the host system analysis processes by wireless communication module teletransmission, remote terminal fails the entry control signal to carry out analysis and discernment for host system through wireless communication module teletransmission, the break -make of the control signal control relay that host system obtained according to analysis and discernment, power, data acquisition module, relay, touch panel module and wireless communication module all connect on host system, form the minor structure of electricelectric, and host system passes through wireless communication module and remote terminal communication connection. The utility model discloses a structure of current block terminal has been simplified to the minor structure of electricelectric, and the wiring is convenient, and can remote control, has improved the security greatly.

Description

Wisdom home terminal

Technical field

The utility model belongs to distribution technique field, particularly relates to wisdom home terminal.

Background technology

Along with growth in the living standard, household electrical appliance or office equipment also get more and more, and distribution box also just becomes and must arrange standby, and traditional distribution box many employings air switch controls the break-make of each power circuit, plays overcurrent protection simultaneously.But traditional distribution box employing is mechanical type, intelligence degree is low, the electricity consumption situation of each electrical appliance in household cannot be checked whenever and wherever possible, also cannot the break-make of remote control home electrical appliance power supply placed in the middle, cannot observe the real-time electricity consumption situation of each electrical appliance in household intuitively, simultaneously air switch is once disconnect can only hand-reset, as air switch breaking-up, manually carrying out complex potential must be very dangerous, can not meet the modern life to intelligentized demand.

Utility model content

In view of the above-mentioned problems in the prior art, main purpose of the present utility model is to address the deficiencies of the prior art, and provides wisdom home terminal, adopt the structure of pure electronic type, simplify the structure of existing distribution box, easy-to-connect, and can Long-distance Control, substantially increase fail safe.

The technical solution adopted in the utility model is as follows:

Wisdom home terminal, comprises mainboard, mainboard is integrated with power supply, data acquisition module, wireless communication module, relay module, contact control module, human-computer interaction module, main control module, anti-surge circuit module and leakage protection module;

Power supply, for power supply;

Data acquisition module, for gathering on off state, the running status of indoor clock, electric current, voltage, humiture data and power consumption equipment;

Wireless communication module, for remote transmission by the data of data collecting module collected and the control signal that sent by remote terminal;

Relay module, has one at least, for the break-make of power consumption equipment power supply in control room;

Contact control module, for the break-make of local touch control relay;

Human-computer interaction module, is integrated with the APP based on linux system, and is provided with display, for read clock, electric current, voltage, humiture data, and the break-make of control relay module and telecommunication;

Remote terminal, for long-range display by the data of data collecting module collected and send control signal;

Main control module, for analyzing, identifying and process by the data of data collecting module collected and the control signal that sent by remote terminal;

Concrete, power supply, data acquisition module, contact control module, human-computer interaction module and wireless communication module are all connected on main control module, and main control module is communicated to connect by wireless communication module and remote terminal; Main control module is connected to the relay module by Power supply, and relay module comprises the photoelectrical coupler that at least one is connected to main control module, and each photoelectrical coupler is all connected with corresponding magnetic latching relay; Each magnetic latching relay is equipped with leakage protection module, and each magnetic latching relay is connected to power consumption equipment respectively by respective leakage protection module, and magnetic latching relay is also connected with outdoor inlet wire, and anti-surge circuit model calling is in outdoor inlet wire;

By data collecting module collected to data through main control module analyzing and processing, the data after main control module analyzing and processing are sent to human-computer interaction module and/or wireless communication module, by wireless communication module remote transmission to remote terminal;

Human-computer interaction module is directly to main control module input control signal; Remote terminal is by wireless communication module to main control module input control signal, and main control module is analyzed the control signal received and identified, main control module is according to analyzing and identifying that the control signal obtained controls the break-make of magnetic latching relay.

Further, main control module is also connected with the terminal of Smart Home relevant device and government department, neighbourhood committee, community and/or residential property by wireless communication module.Human-computer interaction module by APP preset on it to main control module send data collecting module collected to information, and send information by wireless communication module to the terminal of government department, neighbourhood committee, community or residential property, report notice for government department, neighbourhood committee, community or residential property provide, remind and public service ads, play the effect that a network information transmits terminal, realize telecommunication; Even, when main control module is connected with Smart Home relevant device by wireless communication module, as intelligent illuminating switch, smart jack etc., human-computer interaction module just can control intelligent illuminating switch by the control signal of radio communication mold Bulk transport, other Smart Home relevant devices such as smart jack.

Further, the system of described human-computer interaction module also comprises Android system or Windows system, for replacing linux system.

Further, human-computer interaction module adopts light-emitting diode display or LCD display.

Further, main control module is connected to memory.

Further, main control module comprises CPU.

Further, wireless communication module adopts at least one communication based on bluetooth, WIFI, 3G, 4G, 5G, GPS.

Further, relay module preferably arranges two, and the control use for commonly using, another is used as subsequent use.

Further, contact control module adopts touch-screen or touches chip.

In sum, compared with prior art, the beneficial effects of the utility model are:

First, data acquisition module, contact control module and main control module etc. are integrated on mainboard by the utility model, constitute the structure of pure electronic type, so, not only simplify the structure of existing distribution box, and facilitate staff's wiring, are convenient to install, secondly, the utility model have employed contact control module, solves in prior art the defect needing firmly to pull with hand, more time saving and energy saving, then, the utility model adds human-computer interaction module, human-computer interaction module can directly to main control module input control signal, the break-make of control relay module, it also can send information by wireless communication module to the terminal of government department, neighbourhood committee, community or residential property, report notice for government department, neighbourhood committee, community or residential property provide, remind and public service ads, play the effect that a network information transmits terminal, realize telecommunication, when main control module is connected with Smart Home relevant device by wireless communication module, as intelligent illuminating switch, smart jack etc., human-computer interaction module just can control intelligent illuminating switch by the control signal of radio communication mold Bulk transport, other Smart Home relevant devices such as smart jack, in addition, the utility model additionally uses the mode of radio communication, telecommunication is carried out by wireless communication module and remote terminal (as mobile phone etc.), data that the remote terminals such as mobile phone just can arrive according to data collecting module collected or according to actual conditions input control signal, and carry out analyzing and identifying to main control module by wireless communication module remote transmission, main control module is according to the break-make analyzing and identify the control signal control relay obtained, not only achieve the break-make of the indoor power consumption equipment power supply of Long-distance Control, effectively prevent and manually carry out the danger brought that resets, and also achieve Long-distance Control and the local combination controlled like this, staff or user can select suitable mode to control the break-make of power consumption equipment power supply according to actual conditions, have more hommization, when staff or user are inconvenient to use mobile phone, control by this locality the break-make that contact control module controls power consumption equipment power supply, when convenience mobile phone, control the break-make of power consumption equipment power supply by Long-distance Control, and employing the utility model, the break-make of power consumption equipment power supply can also be controlled respectively according to actual conditions, or by controlling the break-make of all power consumption equipment power supplys, magnetic latching relay is have employed again in the utility model, and the magnetic latching relay be connected with power consumption equipment is equipped with leakage protection module, so just can realize detection of electrical leakage and the protection of each power consumption equipment, earth leakage protective as compared with the past can only have electric leakage in measure loop and clearly can not determine that the defect of specifically which electric leakage is greatly improved, due to the characteristic of magnetic latching relay, also can play circuit and automatically connect and cutting action, normally closed or the normally open of magnetic latching relay is the effect relying on permanent-magnet steel completely, the conversion of its on off state leans on the pulse electrical signal of one fixed width to trigger, only need to use just (instead) DC pulse voltage excitation coil, relay just completed out and the State Transferring closed in moment, therefore, quick action, is obviously better than traditional switch.When usual contact is in hold mode, coil does not need to continue energising, only just can maintain the state of relay by the magnetic force of permanent magnet constant.

Accompanying drawing explanation

The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the front view of projecting type capacitor multi-point touch panel in the utility model embodiment 1;

Fig. 3 is the right view of projecting type capacitor multi-point touch panel in the utility model embodiment 1;

Fig. 4 is that in the utility model embodiment 2, contact control module is arranged on the structural representation on mainboard;

Fig. 5 is the structural representation of 5G wireless router in the utility model embodiment 3.

Embodiment

All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Embodiment 1

As shown in Figure 1: the wisdom home terminal of the present embodiment, comprise mainboard, mainboard is integrated with power supply, data acquisition module, wireless communication module, relay module, contact control module, human-computer interaction module, main control module, anti-surge circuit module and leakage protection module, constitute the structure of pure electronic type, so, the structure of existing distribution box is not only simplified, and exquisite, generous in appearance, also facilitate staff's wiring, be convenient to install;

Power supply, for power supply;

Data acquisition module, for gathering the data such as clock, electric current, voltage, humiture;

Wireless communication module, adopts wireless WIFI communication module, for remote transmission by the data of data collecting module collected and the control signal that sent by remote terminal;

Relay module, is provided with two, for the break-make of power consumption equipment power supply in control room;

Contact control module, for the break-make of local touch control relay;

Remote terminal, as mobile phone, computer, panel computer etc., for long-range display by the data of data collecting module collected and send control signal;

Main control module, comprises CPU, for analyzing, identifying and process by the data of data collecting module collected and the control signal that sent by remote terminal;

Human-computer interaction module, be integrated with the APP based on linux system, adopt light-emitting diode display or LCD display, for showing the data such as clock, electric current, voltage, humiture, electric degree arrived through data collecting module collected in real time, the break-make of control relay module, break down in telecommunication and family the failure code of reporting to the police, and fault comprises (overcurrent, overvoltage, under-voltage, short circuit and electric leakage etc.);

Memory, for storing the data such as clock, electric current, voltage, humiture arrived through data collecting module collected;

Human-computer interaction module is directly to main control module input control signal; Remote terminal is by wireless communication module to main control module input control signal, and main control module is analyzed the control signal received and identified, main control module is according to analyzing and identifying that the control signal obtained controls the break-make of magnetic latching relay;

As shown in Figure 1, concrete, power supply, data acquisition module, relay, display, memory, contact control module, human-computer interaction module and wireless communication module are all connected on main control module, and main control module is communicated to connect by wireless communication module and remote terminal; Anti-surge circuit module is provided with between power supply and main control module; Main control module is connected to the relay module by Power supply, and relay module comprises the photoelectrical coupler that at least one is connected to main control module, and each photoelectrical coupler is all connected with corresponding magnetic latching relay; Each magnetic latching relay is equipped with leakage protection module, each magnetic latching relay is connected to power consumption equipment respectively by respective leakage protection module, so just can detect and protect the electric leakage in each loop, in the present embodiment, be also provided with identical leakage protection module in one end of outdoor inlet wire; Magnetic latching relay is also connected with outdoor inlet wire, and anti-surge circuit model calling is in outdoor inlet wire; The design of high-low pressure isolation makes people operate under any condition all to avoid and the electrical contact of high pressure city, and safety is relieved, also can prevent overvoltage, electric leakage etc. from causing damage to system.Leakage protection module, replaces traditional earth leakage protective device, and make each loop to increase creepage protection function, user can match according to demand.

Main control module is also connected with the terminal of Smart Home relevant device and government department, neighbourhood committee, community and/or residential property by wireless communication module, makes human-computer interaction module and Smart Home relevant device form spider net type and is connected.Human-computer interaction module by APP preset on it to main control module send data collecting module collected to information, and send information by wireless communication module to the terminal of government department, neighbourhood committee, community or residential property, report notice for government department, neighbourhood committee, community or residential property provide, remind and public service ads, play the effect that a network information transmits terminal, realize telecommunication; Even, when main control module is connected with Smart Home relevant device by wireless communication module, as intelligent illuminating switch, smart jack etc., human-computer interaction module just can control intelligent illuminating switch by the control signal of radio communication mold Bulk transport, other Smart Home relevant devices such as smart jack.

When human-computer interaction module adopts light-emitting diode display, except can in display room in the parameter such as electric current, voltage, humiture, also show the on off state in each loop, equipment running status, and the failure code of reporting to the police that breaks down in family, fault comprises (overcurrent, overvoltage, under-voltage, short circuit, electric leakage), and main control module can record all fault messages occurred, for user or maintenance personal's inquiry; When human-computer interaction module adopts LCD display, LCD display is functionally expanded greatly, except realizing the repertoire of LED display module, also has the functions such as audio and video playing.

Above-mentioned power supply shown in Fig. 1 is also connected to magnetic latching relay, and a point two-way is powered to magnetic latching relay and CPU.

Remote terminal comprises mobile phone, computer, panel computer etc., and CPU is connected to wireless router by wireless WIFI communication module, carries out information interaction by wireless router and the mobile phone, computer, panel computer etc. being connected to the Internet.

Wherein, data acquisition module comprises clock module, for time synchronized, calculates local time and date;

Current transformer, is made up of iron core and winding, comprises first side winding and secondary side winding, primary side big current can be converted to secondary side small area analysis and detect electric current, also have electrical isolation effect simultaneously;

Voltage transformer, comprises two windings, and one is a winding, one is secondary winding, and two windings are all contained in or around on iron core, between two windings and have insulation between winding and iron core, make between two windings and have electrical isolation between winding and iron core, for detecting voltage;

Temperature Humidity Sensor, for gathering indoor temperature and humidity;

Above-mentioned clock module and Temperature Humidity Sensor are all connected on CPU; Current transformer is connected with filter amplification circuit, be connected on CPU by filter amplification circuit again, the circuit such as A/D conversion are integrated with in CPU, current transformer detects the electric current of required testing circuit, the current signal detected enters in CPU after filter amplification circuit, carry out intellectual analysis process, thus realize the detection of electric current, the current information drawn is transported to light-emitting diode display to last CPU or LCD display shows; In like manner, voltage transformer is connected with filter amplification circuit, be connected on CPU by filter amplification circuit again, voltage transformer detects the voltage of required testing circuit, the voltage signal detected enters in CPU after filter amplification circuit, carry out intellectual analysis process, thus realize the detection of voltage, the information of voltage drawn is transported to light-emitting diode display to last CPU or LCD display shows; The connection of data acquisition module and CPU is realized by the annexation of above-mentioned clock module, current transformer, voltage transformer, Temperature Humidity Sensor and CPU, the Time Calculation of clock module, the function such as synchronous and the function such as the temperature of Temperature Humidity Sensor, the collection of humidity adopt prior art to realize, the technology be known to the skilled person, therefore no longer does herein and specifically repeats.

As shown in Fig. 2 ~ Fig. 3, contact control module, what adopt in the present embodiment is projecting type capacitor multi-point touch panel, described capacitive multi-touch screen is by top ITOGLASS1, optical cement 2, bottom SENSOR3 is formed, described top ITOGLASS1 is the cover of touch-screen, the contact-making surface that user taps, also be the upper circuit part of touch-screen simultaneously, printing and ITO etching combination wiring is starched by silver, described optical cement 2 is for the top ITOGLASS1 and bottom SENSOR3 that bonds, described bottom SENSOR3 is conducting wire plate, for wiring topology, for the lower circuit part of touch-screen.The material of described bottom SENSOR3 is ITOFILM or ITOGLASS.

Projecting type capacitor multi-point touch panel in the present embodiment, holistic cost is compared other structures and be have dropped significantly, and result of use obtains significantly promotes, and this makes some middle and high end quality product also can enter the ranks of mass consumption.

Below more by reference to the accompanying drawings 1 ~ 3, general principle of the present utility model is briefly described.

First, the utility model have employed data acquisition module, the contact control module and main control module etc. of pure electronic type, and by data acquisition module, contact control module etc. are connected on main control module, constitute the structure of pure electronic type, so, just facilitate staff's wiring, be convenient to install, then, the utility model have employed contact control module simultaneously, solves in prior art the defect needing firmly to pull with hand, more time saving and energy saving, in addition, the utility model additionally uses the mode of radio communication, telecommunication is carried out by wireless communication module and remote terminal (as mobile phone etc.), data that the remote terminals such as mobile phone just can arrive according to data collecting module collected or according to actual conditions input control signal, and carry out analyzing and identifying to main control module by wireless communication module remote transmission, main control module is according to the break-make analyzing and identify the control signal control relay obtained, so not only achieve the break-make of the indoor power consumption equipment power supply of Long-distance Control, and also achieve Long-distance Control and the local combination controlled like this, staff or user can select suitable mode to control the break-make of power consumption equipment power supply according to actual conditions, have more hommization, when inconvenience mobile phone, the break-make that projecting type capacitor multi-point touch panel controls power consumption equipment power supply is controlled by this locality, and staff or user had both controlled the break-make of single power consumption equipment power supply respectively by contact control module, also control the break-make of all power consumption equipment power supplys by contact control module, when convenience mobile phone, control the break-make of power consumption equipment power supply by Long-distance Control, and employing the utility model, the break-make of power consumption equipment power supply can also be controlled according to actual conditions respectively, or control the break-make of all power consumption equipment power supplys.

And in the utility model, have employed magnetic latching relay again, due to the characteristic of magnetic latching relay, also can play circuit and automatically connect and cutting action, but, normally closed or the normally open of magnetic latching relay is the effect relying on permanent-magnet steel completely, the conversion of its on off state leans on the pulse electrical signal of one fixed width to trigger (what rely in the utility model is that CPU gives magnetic latching relay pulse electrical signal), only need to use just (instead) DC pulse voltage excitation coil, relay just completed out and the State Transferring closed in moment, therefore, quick action, obviously be better than traditional switch.When usual contact is in hold mode, coil does not need to continue energising, only just can maintain the state of relay by the magnetic force of permanent magnet constant.

Embodiment 2

Be with the main distinction of embodiment 1, the present embodiment adopts 4G(or bluetooth, 3G, GPS) communication module, carry out radio communication by 4G communication module and mobile phone terminal; Because above-mentioned technology is ripe, those skilled in the art all can know its implementation, therefore, no longer do and too much repeat.And the present embodiment is also integrated with alarm on mainboard, alarm is connected on main control module, uses as warning and prompt facility.

In addition, with reference to figure 4, contact control module and energy-conservation soft-touch control in the present embodiment, what adopt is touch chip, touch and refer in particular to single-point or multipoint-touch-technology at this, touch chip and solve traditional button groove position easily overstocked dirt problems, add the useful life controlling button, be the quantum jump by key control simultaneously; The quantity of energy-conservation soft-touch control is determined according to the number of power consumption equipment in actual conditions, each energy-conservation soft-touch control controls a corresponding power consumption equipment respectively, namely wherein the energy-conservation soft-touch control of corresponding each power consumption equipment is indoor point relay, controlling all energy-conservation soft-touch controls is that " one " set up of character patt ern is on mainboard, and be equipped with switch indication light above or below each energy-conservation soft-touch control, to indicate the "on" position of soft-touch control (opening or closing).

Embodiment 3

Be with the main distinction of embodiment 1 and 2, the present embodiment adopts 5G communication module to replace the communication mode of WIFI and 4G; Because 5G technology is not also widely used, now an explanation is done to the 5G communication technology.

The 5G communication technology, namely the 5th generation mobile phone mobile communication standard, also claim the 5th third-generation mobile communication technology, the extension after being also 4G.As everyone knows, 4G network speed probably exceeds about ten times than 3G, and 5G network speed exceeds 4G especially far away, data transmission bauds can improve hundred times, and it, only in second, is used in the utility model and will greatly improves data transmission efficiency by downloading high definition film, improve the response speed of relay, when dangerous accident occurs in indoor, can cut off the electricity supply early, provide against hidden trouble.

Adopt the system construction drawing of the 5G communication technology similar to Example 1, accompanying drawing can be used for reference Fig. 1 to understand, namely the wireless communication module of the present embodiment needs to adopt 5G wireless communication module, 5G wireless communication module is wirelessly connected with 5G wireless router, and 5G wireless router is connected with terminal communications such as the 5G mobile phones of terminal again.

Again the concrete structure of 5G wireless router is described further below, comprises: 5G module, WIFI module, power management module (PMU), radio-frequency module (RFIC), antennal interface (ANT); Described WIFI module is connected with 5G module by USB port; Described power management module (PMU) is connected with 5G module, with thinking 5G module for power supply; Described power management module (PMU) is connected with radio-frequency module (RFIC), with thinking that radio-frequency module (RFIC) is powered; Described radio-frequency module (RFIC) is connected with antennal interface (ANT), in order to send radiofrequency signal by antennal interface (ANT); Described WIFI module has 2 power interfaces, and one is 1.5V power interface, and another is 3.3V power interface; Described WIFI module is connected by the output of 1.5V power interface with the first DC-DC module 11, and the input of described first DC-DC module 11 is connected with+5V power supply.Described WIFI module is connected by the output of 3.3V power interface with the second DC-DC module 12, and the input of described second DC-DC module 12 is connected with+5V power supply; Described WIFI module is connected with an external flap (RJ45 × 1), in order to access RJ45 cable network; Described WIFI module has memory interface, and WIFI module is connected by memory interface and SDRAM (SynchronousDynamicRandomAccessMemory, synchronous DRAM).Synchronously refer to Memory need of work synchronised clock, the transmission of inner order and the transmission of data all with it for benchmark; Dynamically refer to that storage array needs constantly to refresh to ensure that data are not lost; Refer to that data are not linearly store successively at random, but free assigned address carries out reading and writing data; Described WIFI module also has Serial Peripheral Interface, and WIFI module is connected with FLASH by Serial Peripheral Interface (SerialPeripheralInterface, SPI); Described WIFI module also has USB interface, and WIFI module is connected with 5G module by USB interface; Described 5G module has SD card interface and mobile phone card interface, and 5G module is connected with SD card by SD card interface, is connected with Mobile phone card (as SIM card etc.) by mobile phone card interface; 5G module is connected with power management module, and 5G module sends control signal to power management module, powers in order to control power management module; Described power management module is connected with 5G module, in order to the voltage signal (VRGE) after adjustment is inputed to 5G module; Described power management module is connected with 5G module, in order to the clock of control 5G module by oscillator module (TemperatureCompensateX ' tal (crystal) Oscillator, TCXO); Described power management module (PMU) is connected with radio-frequency module (RFIC), with thinking that radio-frequency module (RFIC) is powered; Described 5G router adopts common 3.7V lithium battery power supply, and charging adopts external MINIUSB mouth, is convenient to connect PC and general charging head, be a kind ofly to be convenient for carrying, the routing device of Universal joint.

Description of the present utility model and application are illustrative, not want by scope restriction of the present utility model in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present utility model or substantive characteristics, and the utility model with other forms, structure, layout, ratio, and can realize with other elements, material and parts.

Claims

1. wisdom home terminal, is characterized in that, comprises mainboard, mainboard is integrated with power supply, data acquisition module, wireless communication module, relay module, contact control module, human-computer interaction module, main control module and anti-surge circuit module;

Power supply, for power supply;

Contact control module, for the break-make of local touch control relay;

2. wisdom home terminal according to claim 1, is characterized in that, described main control module is also connected with the terminal of Smart Home relevant device and government department, neighbourhood committee, community and/or residential property by wireless communication module.

3. wisdom home terminal according to claim 1, is characterized in that, the system of described human-computer interaction module also comprises Android system or Windows system, for replacing linux system.

4. wisdom home terminal according to claim 3, is characterized in that, human-computer interaction module adopts light-emitting diode display or LCD display.

5. wisdom home terminal according to claim 1, it is characterized in that, main control module is connected to memory.

6. wisdom home terminal according to claim 1, it is characterized in that, main control module comprises CPU.

7. wisdom home terminal according to claim 1, is characterized in that, wireless communication module adopts at least one communication based on bluetooth, WIFI, 3G, 4G, 5G, GPS.

8. wisdom home terminal according to claim 1, is characterized in that, relay module arranges two.

9. wisdom home terminal according to claim 1, is characterized in that, contact control module adopts touch-screen or touches chip.

10. wisdom home terminal according to claim 9, is characterized in that, described touch-screen is capacitive multi-touch screen.