CN200953145Y

CN200953145Y - Touch screen testing device

Info

Publication number: CN200953145Y
Application number: CN 200620017226
Authority: CN
Inventors: 刘真源; 李航; 喻安荣; 刘嘉
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2006-07-24
Filing date: 2006-07-24
Publication date: 2007-09-26
Anticipated expiration: 2016-07-24

Abstract

This utility model publicizes a touch screen test device, consists of A/D conversion module, SCM, serial port and touch screen interface module. The A/D conversion module combined with SCM may be used for controlling the touch screen, simulate the touch screen on the PC through the serial port through the PC communication so as to test the touch screen on the PC. One set of tools may be used for testing several types of touch screens, without replacing the hardware and software.

Description

A kind of testing device for touch screens

[technical field]

The utility model relates to a kind of testing device for touch screens.

[background technology]

Testing touch screen is the important procedure in touch-screen production, the use.This test mainly is that test touch is shielded when being subjected to touching, and whether can export correct response signal, and its test can comprise each point on the screen, perhaps the point of selecting on the screen.

Just because the signal of touch-screen output is the signal that has only instrument to discern,, generally uses a display screen and link to each other, show the response results of touch-screen during test with display screen, the state of simulate with touch-screen in order to make test result visual.Fig. 1 is the test mode of a kind of touch-screen of adopting at present often, and it is the pattern that adopts " mainboard+LCD+TP (touch-screen) ", promptly drives LCD and touch-screen with mainboard, and the test result of touch-screen is shown on LCD.

When testing with the method, the size of touch-screen and the size of LCD such as must be at big (or amplify in proportion or dwindle), and different LCD and touch-screen can the different drivings of corresponding mainboard, so this method only is applicable to the touch-screen of surveying single model.If survey multiple model, just need be modified to correspondingly suitable LCD and mainboard program, this will cause operation inconvenience, and the waste resource.

[utility model content]

The purpose of this utility model is to propose a kind of testing device for touch screens, need not change convenient the use when the touch-screen of test different model.

For this reason, testing device for touch screens of the present utility model comprises clock and data conversion module, controller and the analog-to-digital conversion module that links to each other successively; When using, described clock and data conversion module link to each other with computing machine.

Further, the utility model also comprises:

Serial interface module is connected between described clock and data conversion module and the computing machine;

The touch screen interface module is used for described analog-to-digital conversion module is linked to each other with tested touch-screen in use.

The utility model testing device for touch screens utilizes interface that control information and response message are delivered on the computing machine, and computing machine is handled these data, and the state of simulate reaches the purpose that test touch is shielded.The program of computer terminal can show the test effect of touch-screen according to the display window of the newly-built same size of size of touch-screen, so this method of testing just need not need look for the LCD with the touch-screen size to show as classic method like that, also removed from because of changing the trouble that LCD goes to change the mainboard program, realized testing the touch-screen of multiple model, and need not change hardware and software with kit.

[description of drawings]

Fig. 1 is the prior art synoptic diagram.

Fig. 2 is the utility model synoptic diagram.

Fig. 3 is the block diagram of the utility model embodiment test board part.

Fig. 4 is the utility model embodiment D/A converter module synoptic diagram.

Fig. 5 is the utility model embodiment single-chip microcomputer synoptic diagram.

Fig. 6 is the utility model embodiment touch screen interface module diagram.

Fig. 7 is the utility model embodiment clock and data conversion module synoptic diagram.

Fig. 8 is the utility model embodiment serial interface module synoptic diagram.

Fig. 9 is the program circuit synoptic diagram of the utility model embodiment single-chip microcomputer end operation.

Figure 10 is the program circuit synoptic diagram of the utility model embodiment PC end operation.

[embodiment]

The utility model block diagram as shown in Figure 2.Test board 2 (by interface module, hereinafter will state) links to each other with PC 3 with tested touch-screen 1 respectively, and the response message of control information and touch-screen 1 is delivered on the PC 3, and PC 3 is handled these data, the state of simulate.

Wherein test board 2 is exactly the example of the embodiment of testing device for touch screens of the present invention.Its structure as shown in Figure 3, as seen from the figure, clock and data conversion module (MAX232) 22, single-chip microcomputer (8052) 25, analog-to-digital conversion module (TSC2046) 24 link to each other successively.And clock and data conversion module (MAX232) 22 can pass through serial interface module (RS232) 21 when using and link to each other with PC 3; Analog-to-digital conversion module (TSC2046) 24 can link to each other with tested touch-screen 11 by touch screen interface module (TOUCH_PANEL_4WIRES) 23 in use.

The circuit theory diagrams of each module and function are as follows respectively:

Analog-to-digital conversion module (TSC2046) 24, its circuit theory diagrams as shown in Figure 4, its function is: the simulating signal that touch-screen 1 is produced changes into digital signal, passes to single-chip microcomputer 25 with the interruption form.

Single-chip microcomputer (8052) 25, its circuit theory diagrams as shown in Figure 5, its function is: this module controls analog-to-digital conversion module (TSC2046) 24, and the signal that will be produced by touch-screen 1 at first sends clock and data conversion module (MAX232) 22 to, finally is delivered on the PC 3 by serial interface module (RS232) 21.Process flow diagram shown in Figure 9 is the schematic flow sheet of the control program in this single-chip microcomputer 25.This program compilation becomes binary code, downloads on the single-chip microcomputer 25.

Touch screen interface module (TOUCH_PANEL_4WIRES) 23, its circuit theory diagrams as shown in Figure 6, its function is: this module connects touch-screen 1.When touch-screen 1 was subjected to outside pressure, touch-screen 1 can produce the meeting simulating signal, is delivered in the analog-to-digital conversion module (TSC2046) 24 by this module.

Clock and data conversion module (MAX232) 22, its circuit theory diagrams as shown in Figure 7, its function is to be used for clock conversion.The clock and the data of serial ports and single-chip microcomputer 25 are changed mutually.

Serial interface module (RS232) 21, its circuit theory diagrams as shown in Figure 8, its function is: by this module the response message of touch-screen is delivered to serial ports, and finally passes on the PC 3.

Shown in Figure 10 is the process flow diagram that runs on the control program on the PC 3, and this program compilation becomes executable program, operates in the PC end.

During use, touch-screen is received on the touch screen interface module (TOUCH_PANEL_4WIRES) 23, an end of serial port data line is linked to each other with PC 3 serial ports, an end links to each other with serial interface module (RS232) 21 modules.And single-chip microcomputer 25 is inserted into the relevant position of test board, promptly between clock and data conversion module (MAX232) 22 and the analog-to-digital conversion module (TSC2046).Add power supply for monolithic 25 machine ends, allow its operation; Double-click the program of PC 3 ends, allow its operation.With four corners of hand touching touch-screen 1, the size (size) that makes PC end program measure touch-screen is touched the pilot to be measured of touch-screen to be tested, if this point is out of question, then will highlightedly show on position corresponding on the PC.

The characteristics of present embodiment are to utilize analog-to-digital conversion module 24 (chip TSC2046) to drive touch-screen, by serial ports with the control information of touch-screen and response message is delivered on the PC and to these data processing, demonstration, reach the purpose of test touch screen.Those of ordinary skill in the art can know, the foregoing description is used for just that present invention is described, rather than to the restriction of invention protection domain.Such as: PC can be the computing machine of other types, and LCD can be the display device of other types such as CRT, and single-chip microcomputer can be with single card microcomputer or other controller chips, or the like.

Claims

1, a kind of testing device for touch screens is characterized in that: comprise the clock and data conversion module (22), controller (25) and the analog-to-digital conversion module (24) that link to each other successively; When using, described clock and data conversion module (22) link to each other with computing machine (3).

2, testing device for touch screens as claimed in claim 1 is characterized in that: also comprise serial interface module (21), be connected between described clock and data conversion module (22) and the computing machine (3).

3, testing device for touch screens as claimed in claim 1 or 2 is characterized in that: also comprise touch screen interface module (23), be used for described analog-to-digital conversion module (24) is linked to each other with tested touch-screen (11) in use.