CN113238114B

CN113238114B - Universal automatic detection device and method for touch screen

Info

Publication number: CN113238114B
Application number: CN202110782447.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen Y&D Electronics Information Co Ltd
Current assignee: Shenzhen Y&D Electronics Information Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-10-22
Anticipated expiration: 2041-07-12
Also published as: CN113238114A

Abstract

The invention relates to a universal automatic detection device and method for a touch screen. This general type touch-sensitive screen automatic checkout device includes: the device comprises a conversion joint connected with a touch screen, a route selection switch circuit connected with the conversion joint, a parameter detection module communicated with the route selection switch circuit, and a controller used for controlling the parameter detection module to perform parameter detection; the route selection switch circuit comprises a plurality of route selection units, each channel of the route selection units corresponds to the induction wiring terminal of the touch screen one by one, and each channel serial number corresponds to each induction wiring terminal address signal one by one; the controller gates two paths in different routing units based on the parameters to be detected to detect the parameters of the touch screen. The invention can adapt to the detection of most touch screen parameters by only configuring corresponding joints without a touch screen driving chip, and has the advantages of high detection speed, high precision and flexibly configurable detection parameters.

Description

Universal automatic detection device and method for touch screen

Technical Field

The present invention relates to a touch screen, and more particularly, to an apparatus and method for automatically detecting a general-purpose touch screen.

Background

The structure of the touch screen is shown in fig. 1A. The touch is determined by measuring the change of capacitance or resistance values cross-induced or induced to the ground GND by the sensing terminals arranged in both the vertical Y direction and the horizontal X direction on the screen. This is because a touch action may cause the parameter to change significantly. The parameter detection of the touch screen is mostly completed by depending on the driver chip, as shown in fig. 1B, the driver chip may communicate with the host through the IIC or SPI bus, receive command control, and transmit the parameter detection result to the host. However, the detection method depends on the driving chip, and different driving chips need to be adopted for different touch screens, which results in that the detection device cannot be used universally. In addition, for a developer of the touch screen, before finding a proper driving chip, parameters of the display screen need to be detected, and the existing detection device depending on the driving chip is obviously not realized. Furthermore, details of the driving chip of some touch screens are difficult to obtain, which makes the development of the detection device difficult.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a universal automatic detection device for a touch screen, which can adapt to the detection of most touch screen parameters by only configuring corresponding connectors without a touch screen driving chip, and has the advantages of high detection speed, high precision and flexible configuration of detection parameters.

The technical scheme adopted by the invention for solving the technical problems is as follows: a general-purpose type touch screen automatic detection device is constructed, and comprises: the device comprises a conversion joint connected with a touch screen, a route selection switch circuit connected with the conversion joint, a parameter detection module communicated with the route selection switch circuit, and a controller used for controlling the parameter detection module to perform parameter detection;

the route selection switch circuit comprises a plurality of route selection units, each channel of the route selection units corresponds to the induction wiring terminal of the touch screen one by one, and each channel serial number corresponds to each induction wiring terminal address signal one by one; the controller gates two paths in different routing units based on the parameters to be detected to detect the parameters of the touch screen.

In the automatic detection device for the universal touch screen, the plurality of routing chips comprise a plurality of groups of routing chips which are connected in parallel, an X even routing chip, an X odd routing chip, a Y even routing chip, a Y odd routing chip, a first port routing chip and a second port routing chip;

the even numbered terminals at the X end of the adapter are respectively connected with the multi-path input ends of the first group of routing chips in a one-to-one corresponding manner, the odd numbered terminals at the X end are respectively connected with the multi-path input ends of the second group of routing chips in a one-to-one corresponding manner, the even numbered terminals at the Y end are respectively connected with the multi-path input ends of the third group of routing chips in a one-to-one corresponding manner, and the odd numbered terminals at the Y end are respectively connected with the multi-path input ends of the fourth group of routing chips in a one-to-one corresponding manner; the X-end even-numbered terminal, the Y-end even-numbered terminal and the Y-end odd-numbered terminal of the adapter respectively correspond to an X even-numbered address signal, an X odd-numbered address signal, a Y even-numbered address signal and a Y odd-numbered address signal of the touch screen;

the single-path output ends of the first group of routing chips are respectively connected with the multi-path input ends of the X even routing chips, the single-path output ends of the second group of routing chips are respectively connected with the multi-path input ends of the X odd routing chips, the single-path output ends of the third group of routing chips are respectively connected with the multi-path input ends of the Y even routing chips, and the single-path output ends of the fourth group of routing chips are respectively connected with the multi-path input ends of the Y odd routing chips; the single-path output end of the X even routing chip, the single-path output end of the X odd routing chip, the single-path output end of the Y even routing chip and the single-path output end of the Y odd routing chip are respectively connected with the multi-path input ends of the first port routing chip and the second port routing chip in a one-to-one correspondence manner; and the single-path output end of the first port routing chip is connected with the first detection interface and the second detection interface of the parameter detection module, and the single-path output end of the second port routing chip is connected with the third detection interface and the fourth detection interface of the parameter detection module.

In the automatic detection device for the universal touch screen, the parameter detection module is an LCR meter, and the LCR meter is used for detecting the calibration of the touch screen, the ground short circuit of each induction terminal, the short circuit of adjacent induction terminals and the induction function.

In the automatic detection device for the universal touch screen, the controller controls the first port routing chip and the second port routing chip to be open-circuited, then the open-circuit calibrates the LCR table, then controls the first port routing chip and the second port routing chip to be short-circuit, and then the short-circuit calibrates the LCR table.

In the automatic detection device for the universal touch screen, the controller controls the first port routing chip to gate and ground, gates the channels from each sensing terminal to the second port routing chip one by one according to the sensing terminal address signals, and detects the ground parameters of each channel in sequence by adopting the LCR to detect the ground short circuit of each sensing terminal.

In the automatic detection device for the universal touch screen, aiming at each odd induction terminal, the controller controls and gates a passage from the odd induction terminal to the first port route selection chip through the induction terminal address signal, gates a passage from each even induction terminal to the second port route selection chip one by one according to the induction terminal address signal, and detects the parameters of each passage in sequence by adopting the LCR table to detect the short circuit between the adjacent induction terminal passages.

In the automatic detection device for the universal touch screen, aiming at each X even-numbered induction terminal, the controller controls and gates a path from the X even-numbered induction terminal to the first port route selection chip through the induction terminal address signal, gates paths from each X odd-numbered induction terminal, each Y even-numbered induction terminal and each Y odd-numbered induction terminal to the second port route selection chip one by one according to the induction terminal address signal, and detects the parameters of each path in sequence by adopting the LCR table to detect the induction between the adjacent induction terminals.

In the automatic detection device for the universal touch screen, the route selection chip is a 16-to-16-channel chip, and the one-to-one correspondence relationship between each channel serial number and each induction terminal address signal is stored in address table configuration information.

Another solution adopted to solve the technical problem is to construct an automatic detection method for a universal touch screen, which includes calibrating the touch screen, short-circuiting each sensing terminal to ground, short-circuiting adjacent sensing terminals, and detecting sensing functions by using the automatic detection device for a universal touch screen.

In the automatic detection method of the universal touch screen, the parameter detection comprises the calibration of the touch screen, the short circuit to the ground of each sensing terminal, the short circuit of the adjacent sensing terminals and the sensing function.

The invention relates to a universal type touch screen automatic detection device and a method thereof.A route selection switch circuit formed by a plurality of route selection units is adopted, each channel of the route selection unit is in one-to-one correspondence with an induction terminal of a touch screen, each channel serial number is in one-to-one correspondence with each induction terminal address signal, and then two channels positioned in different route selection units are gated based on the parameters to be detected so as to detect the parameters of the touch screen.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1A is a schematic diagram of a touch screen configuration;

FIG. 1B is a diagram of a prior art touch screen with a driver chip;

FIG. 2 is a schematic block diagram of the universal touch screen automatic detection device of the present invention;

FIG. 3 is an equivalent circuit diagram of the general touch screen automatic detection device shown in FIG. 2;

FIG. 4 is a schematic structural diagram of a preferred routing chip employed in the automatic detection device for a general-purpose touch screen shown in FIG. 2;

FIG. 5 is a schematic diagram of a serial-to-parallel cascade of the preferred routing chips shown in FIG. 4;

FIG. 6 is a schematic diagram of a routing switch circuit of the automatic detection device for a general-purpose touch screen according to the preferred embodiment of the invention;

FIG. 7 is a schematic flow chart of calibration using the automatic detection device for a general-purpose touch screen shown in FIG. 6;

FIG. 8 is a schematic flow chart of the detection of the short circuit to ground by the automatic detection device of the general touch screen shown in FIG. 6;

FIG. 9 is a schematic view showing a flow of detecting short circuit between adjacent sensing terminals by using the automatic detecting device for a general touch screen shown in FIG. 6;

fig. 10 is a schematic flow chart illustrating the sensing function detection of adjacent sensing terminals by using the automatic detection device for a general-purpose touch screen shown in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention relates to a universal touch screen automatic detection device, comprising: the device comprises a conversion joint connected with a touch screen, a route selection switch circuit connected with the conversion joint, a parameter detection module communicated with the route selection switch circuit, and a controller used for controlling the parameter detection module to perform parameter detection; the route selection switch circuit comprises a plurality of route selection units, each channel of the route selection units corresponds to the induction wiring terminal of the touch screen one by one, and each channel serial number corresponds to each induction wiring terminal address signal one by one; the controller gates two paths in different routing units based on the parameters to be detected to detect the parameters of the touch screen. The invention uses the route selection switch circuit formed by a plurality of route selection units, and makes each channel of the route selection unit correspond to the induction connection terminal of the touch screen one by one, and the serial number of each channel corresponds to the address signal of each induction connection terminal one by one, and then based on the parameter to be detected, the two channels in different route selection units are gated to detect the parameter of the touch screen, therefore, the invention can adapt to the detection of most parameters of the touch screen only by configuring corresponding joints without a driving chip of the touch screen, and has the advantages of high detection speed, high precision and flexible configuration of the detection parameter.

Fig. 2 is a schematic block diagram of an automatic detection apparatus of the general touch screen 100 of the present invention. Fig. 3 is an equivalent circuit diagram of the automatic detection device of the general-purpose touch panel 100 shown in fig. 2. As shown in fig. 2, the automatic detection device for a general-purpose touch screen 100 includes a connector 200 connected to the touch screen 100, a routing switch circuit 300 connected to the connector 200, a parameter detection module 500 connected to the routing switch circuit 300, and a controller 400 for controlling gating of two paths to be detected in the routing switch circuit 300 so that the parameter detection module 500 can perform parameter detection.

In a preferred embodiment of the present invention, the routing switch circuit 300 includes a plurality of routing units, each path of the routing units corresponds to a sensing terminal of the touch screen 100, and each path serial number corresponds to an address signal of each sensing terminal. The controller 400 gates two paths in different routing units based on the parameter to be detected to detect the parameter of the touch screen 100.

In the present invention, the touch screen 100 to be detected is connected to the routing switch circuit 300 through the transit connector 200. The routing switch circuit 300 may include a plurality of routing units, and the routing units may be routing chips, such as a multi-selection chip shown in fig. 4, a serial-parallel cascade module of the routing chips shown in fig. 5, or a relay module. In the invention, a chip with more than one selection is preferably adopted, because compared with a relay scheme, the chip with more than one selection has the advantages of high integration level, less power consumption, high switching speed and low cost. The resistance of a few ohms is increased by routing through a chip, the deviation can be reduced to be below 1 ohm through a calibration measure, the influence on the detection impedance is small, and the detection effect is not influenced. Of course, in other preferred embodiments of the present invention, based on the teaching of the present invention, those skilled in the art can also use relays to construct the routing unit of the present invention.

In a preferred embodiment of the present invention, the parameter detection module 500 may be any suitable inductive resistance voltage measurement instrument, which is preferably an LCR meter. It may of course comprise any suitable inductance, resistance and voltage meter or combination thereof. The controller 400 may include any suitable circuit, module or software, and is configured to control the routing switch circuit 300 to sequentially gate 2 paths to be detected and control the parameter detection module 500 to perform detection according to a one-to-one correspondence relationship between each stored path serial number and each sensed terminal address signal based on an instruction input by a user or a built-in program instruction. After each detection, the next group of 2-path paths can be switched to for detection. In a preferred embodiment of the present invention, the LCR meter may be employed for detecting calibration of the touch screen 100, short-circuiting each sensing terminal to ground, short-circuiting adjacent sensing terminals, and sensing functionality.

The invention uses the route selection switch circuit formed by a plurality of route selection units, and makes each channel of the route selection unit correspond to the induction connection terminal of the touch screen one by one, and the serial number of each channel corresponds to the address signal of each induction connection terminal one by one, and then based on the parameter to be detected, the two channels in different route selection units are gated to detect the parameter of the touch screen, therefore, the invention can adapt to the detection of most parameters of the touch screen only by configuring corresponding joints without a driving chip of the touch screen, and has the advantages of high detection speed, high precision and flexible configuration of the detection parameter.

In a further preferred embodiment of the present invention, the routing switch circuit 300 is constructed using a series-parallel cascade of modules of the routing chip shown in FIG. 5. An LCR table is used as the parameter detection module 500. Because the number of selectable paths of a single routing chip is limited, the path is generally selected from 1 to 16, and a plurality of routing chips are required to be combined for use. The multi-selection chip can only select one of the multiple paths as a path, so that 2 paths of signals needing to be gated need to be gated from different path selection chips. In order to reduce the influence of the detection circuit on the detection parameters, the number of connection branches when the same detection signal is wired should be reduced as much as possible. For the detection requirements of the sensing terminals in the X direction and the sensing terminals in the Y direction of the touch screen shown in fig. 1A, the interaction parameters need to be detected, and therefore, the detection requirements need to be arranged on different routing chips. Adjacent sensing terminals (pins) also need to be measured for short circuits and also need to be placed on different routing chips. Each sensing terminal (pin) needs to be able to measure a ground reference. Furthermore, calibration of the LCR table requires open and short routing, which is also taken into account in the routing. In view of the above, fig. 6 shows a schematic structural diagram of a routing switch circuit of the automatic detection device for a general-purpose touch screen according to the preferred embodiment of the invention.

As shown in fig. 6, the routing switch circuit 300 includes a plurality of routing chips, i.e., a plurality of sets of routing

chips

311 and 318 connected in parallel, an X even routing chip 321, an X odd routing chip 322, a Y even routing chip 323, a Y odd routing chip 324 cascaded with each set of routing chips, a first port routing chip 331 and a second port routing chip 332. The routing chips 311 and 318 are divided into four groups, and each two routing chips are a group. Of course, in other preferred embodiments of the present invention, a greater number of routing chips may be included.

In the present embodiment, referring to the touch screen 100 shown in fig. 1A, it is known that the sensing terminals are arranged in both the vertical Y direction and the horizontal X direction on the screen, i.e., a sensing terminal address signal of (Xn, Ym) can be assigned to each sensing terminal. The outgoing line of the touch screen 100 is connected to the adaptor connector 200. The output terminals of the adapter 200 correspond to the sensing terminals one by one. According to the corresponding address signal of the sensing terminal, the output terminal of the adapter connector 200 is divided into an X-end even-numbered terminal, an X-odd-numbered terminal, a Y-end even-numbered terminal, and a Y-odd-numbered terminal as shown in fig. 6. Therefore, the X-end even-numbered terminal, the Y-end even-numbered terminal, and the Y-end odd-numbered terminal of the adaptor 200 correspond to an X even address signal, an X odd address signal, a Y even address signal, and a Y odd address signal, respectively, in the sensing terminal address signals of the touch screen 100. Then, the even-numbered terminals at the X-end of the crossover sub 200 are connected to the multi-path input terminals of the

routing chips

311 and 312, respectively, in a one-to-one correspondence. Similarly, the odd-numbered terminals at the X end of the adapter 200 are connected to the multi-path input ends of the

routing chips

313 and 314 in a one-to-one correspondence. The even-numbered terminals at the Y end of the crossover sub 200 are connected to the multi-path input ends of the

routing chips

315 and 316, respectively, and the odd-numbered terminals at the Y end of the crossover sub 200 are connected to the multi-path input ends of the

routing chips

317 and 318, respectively, in a one-to-one correspondence. Thus, each sensing terminal on the touch screen 100 corresponds to a path of the routing chip.

The single-path output ends of the

routing chips

311 and 312 are respectively connected to the multi-path input ends of the X even routing chip 321, the single-path output ends of the

routing chips

313 and 314 are respectively connected to the multi-path input ends of the X odd routing chip 322, the single-path output ends of the

routing chips

315 and 316 are respectively connected to the multi-path input ends of the Y even routing chip 323, and the single-path output ends of the

routing chips

317 and 318 are respectively connected to the multi-path input ends of the Y odd routing chip 324. As further shown in fig. 6, the single output terminal of the X even routing chip 321, the single output terminal of the X odd routing chip 322, the single output terminal of the Y even routing chip 323, and the single output terminal of the Y odd routing chip 324 are respectively connected to the multiple input terminals of the first port routing chip 331 and the second port routing chip 332 in a one-to-one correspondence manner. The single output end of the first port routing chip 331 is connected to the first detection interface and the second detection interface of the parameter detection module 500, and the single output end of the second port routing chip 332 is connected to the third detection interface and the fourth detection interface of the parameter detection module 500.

In the preferred embodiment, the

routing chip

311 and 318, the X even routing chip 321, the X odd routing chip 322, the Y even routing chip 323, and the Y odd routing chip 324, the first port routing chip 331 and the second port routing chip 332 can select 16-to-16 routing chips, and the one-to-one correspondence relationship between each routing serial number and each sensing terminal address signal is stored in the address table configuration information. The controller 400 may query the relationship between the gated channel serial number and the corresponding sensing terminal address signal in the address table configuration information by looking up a table. For example, X0 corresponds to the path number 1 of the routing chip 311, X2 corresponds to the path number 2, … of the routing chip 311, X32 corresponds to the path number 16 of the routing chip 311, and … X2n corresponds to the path number n/2 of the routing chip 312. Similarly, X1 corresponds to the path number 1 of the routing chip 313, X3 corresponds to the path number 2, … of the routing chip 313, X33 corresponds to the path number 16 of the routing chip 313, and … X2n +1 corresponds to the path number n/2 of the routing chip 314. Similarly, Y0 corresponds to the path number 1 of the routing chip 315, Y2 corresponds to the path number 2, … of the routing chip 315, Y32 corresponds to the path number 16 of the routing chip 315, and … Y2n corresponds to the path number n/2 of the routing chip 316. Similarly, Y1 corresponds to the channel number 1 of the routing chip 317, Y3 corresponds to the channel number 2, … of the routing chip 317, Y33 corresponds to the channel number 16 of the routing chip 317, and … Y2n +1 corresponds to the channel number n/2 of the routing chip 314. Similarly, as shown in fig. 6, the single-path output end of the routing chip 311 corresponds to the path number 1 of the X even routing chip 321, the single-path output end of the routing chip 312 corresponds to the path number 2 of the X even routing chip 321, the single-path output end of the routing chip 313 corresponds to the path number 1 of the X odd routing chip 322, the single-path output end of the routing chip 314 corresponds to the path number 2 of the X odd routing chip 322, the single-path output end of the routing chip 315 corresponds to the path number 1 of the Y even routing chip 323, the single-path output end of the routing chip 316 corresponds to the path number 2 of the Y even routing chip 323, the single-path output end of the routing chip 317 corresponds to the path number 1 of the Y odd routing chip 324, and the single-path output end of the routing chip 318 corresponds to the path number 2 of the Y odd routing chip 324. The X odd routing chip 322, the Y even routing chip 323, and the Y odd routing chip 324 correspond to the channel numbers 1-4 of the first port routing chip 331 and the channel numbers 1-4 of the second port routing chip 332, respectively.

For example, if the sensing terminal address signal is the path serial number corresponding to (X3, Y6), the address table configuration information may be queried for the path serial number 2 of the routing chip 313 corresponding to the first path, the path serial number 1 of the X odd routing chip 322, and the path serial number 2 of the routing chip 331 for the first port or the routing chip 332 for the second port; the corresponding second channel signal is a channel number 4 of the routing chip 315, a channel number 1 of the Y even routing chip 323, and a channel number 3 of the first port routing chip 331 or the second port routing chip 332. For other sense terminal address signals, the analogy can be made and the description will not be repeated here.

With the preferred design of the embodiment shown in FIG. 6, an LCR meter can be used to detect calibration of the touch screen, shorting of individual sense terminals to ground, shorting of adjacent sense terminals, and sensing functionality. When performing detection, the controller 400 divides the signals to be routed into the LCR table into 4 groups, which are: an even-numbered terminal at the X end, a ground, a short circuit calibration signal and an open circuit calibration signal; the X end odd numbered terminal, the ground, a short circuit calibration signal and an open circuit calibration signal; y end even numbered terminal, ground, short circuit calibration signal, open circuit calibration signal; y end odd number terminal, ground, short circuit calibration signal, open circuit calibration signal. The reason for this grouping is that no pair-wise detection is required within these 4 groups, but between groups. Finally, the gated 2-way port is connected to the LCR table, which is port 1 and port 2 in fig. 6, wherein port 1 is connected to the first and second detection ports of the LCR table, and port 2 is connected to the third and fourth detection ports of the LCR table.

Fig. 7 is a schematic flowchart of calibration performed by the automatic detection device for a general-purpose touch screen shown in fig. 6. As shown in fig. 7, the controller 400 controls the first port routing chip 331 and the second port routing chip 332 to be open-circuited, and then open-circuited to calibrate the LCR table, and then controls the first port routing chip 331 and the second port routing chip 332 to be short-circuited, and then short-circuited to calibrate the LCR table. The calibration step is generally fast in operation, can be set to automatically operate once when the computer is started, and does not occupy detection time when detection is carried out.

Fig. 8 is a schematic flow chart of the detection of the ground short circuit by using the automatic detection device for a general-purpose touch screen shown in fig. 6. As shown in fig. 8, the controller 400 controls the first port routing chip 331 to gate the ground, gates the paths from each sensing terminal to the second port routing chip 332 one by one according to the sensing terminal address signal, and detects the ground parameter of each path in sequence by using the LCR table to detect the ground short circuit of each sensing terminal. Referring to FIG. 6, for example, for the sensing terminal address signals (X3, Y6), the first channel can be selected as channel number 2 of the routing chip 313, channel number 1 of the X odd routing chip 322, and channel number 2 of the second port routing chip 332; the second channel gate is a channel number 4 of the routing chip 315, a channel number 1 of the Y even routing chip 323, and a channel number 3 of the second port routing chip 332. The LCR can then make inductance, voltage and resistance measurements to determine if there is a short to ground fault in the path and analyze if there is a short to ground fault at the sense terminal. The detection step of the path to the parameters needs to carry out switching and detection for X total number + Y total number, the switching and detection times are few, and the operation is fast.

Fig. 9 is a schematic flow chart of the detection of short circuit between adjacent sensing terminals by using the automatic detection device for a general touch screen shown in fig. 6. The adjacent channel parameters are usually used to determine whether there is a short circuit fault between the channels. It can be judged whether or not there is a short-circuit fault at the sensing terminal. For each odd sensing terminal, the controller 400 controls the path from the odd sensing terminal to the first port routing chip 331 to be gated by the sensing terminal address signal, gates the path from each even sensing terminal to the second port routing chip 332 to be gated one by one according to the sensing terminal address signal, and detects the parameter of each path in sequence by using the LCR table to detect the short circuit between adjacent sensing terminal paths.

For example, for the X3 path, the first port routing chip 331 may gate the path signal for the X5 path, and the second port routing chip 332 may gate the path signal for the X4 path. Specific path gating can be referred to the above embodiments and will not be described again here. The adjacent channel parameter detection needs to perform switching and detection for n (for example, 14) + m (for example, 10 in fig. 1A) -2= (22) times, the switching and detection times are few, and the operation is fast.

As can be seen from fig. 6, the first channel can select channel number 3 of the routing chip 313, channel number 1 of the X odd routing chip 322, and channel number 2 of the first port routing chip 331; the second path may be a path number 3 of the routing chip 311, a path number 1 of the X even routing chip 321, and a path number 1 of the second port routing chip 332. For other sense terminal address signals, the analogy can be made and the description will not be repeated here.

Fig. 10 is a schematic flow chart illustrating the sensing function detection of adjacent sensing terminals by using the automatic detection device for a general-purpose touch screen shown in fig. 6. In this embodiment, for each X even-numbered sensing terminal, the controller 400 controls the path from the X even-numbered sensing terminal to the first port routing chip 331 by the sensing terminal address signal, and gates the paths from each X odd-numbered sensing terminal, each Y even-numbered sensing terminal, and each Y odd-numbered sensing terminal to the second port routing chip 332 one by one according to the sensing terminal address signal, and detects the parameter of each path in sequence by using the LCR table to detect the sensing between adjacent sensing terminals. That is, taking fig. 1A as an example, the first port routing chip 331 can gate the path signals of the X0-X13 paths in turn, and the second port routing chip 332 can gate the path signals of the Y1-Y10 paths. For example, the first channel may select channel number 1 of the routing chip 313, channel number 1 of the X even routing chip 322, and channel number 1 of the first port routing chip 331; the second channel can be channel number 1 of the routing chip 317, channel number 1 of the Y even routing chip 324, and channel number 4 of the second port routing chip 332. For other sense terminal address signals, the analogy can be made and the description will not be repeated here.

X, Y interaction parameters are usually used to detect the touch screen sensing function, and the interaction parameter detection needs to perform n (14) × m (10 in fig. 1A) =140 switches and detections, with the switch and detection times being many and the operation being slowest.

The general automatic detection device for the touch screen is implemented by adopting a route selection switch circuit formed by a plurality of route selection units, each channel of the route selection unit corresponds to the induction wiring terminal of the touch screen one by one, the serial number of each channel corresponds to the address signal of each induction wiring terminal one by one, and then two channels in different route selection units are gated based on the parameters to be detected so as to detect the parameters of the touch screen.

The invention also relates to an automatic detection method of the universal touch screen, which comprises the steps of calibrating the touch screen 100, detecting the ground short circuit of each sensing terminal, the short circuit of adjacent sensing terminals and the sensing function by using the automatic detection device of the universal touch screen 100.

Accordingly, the present invention can be realized in hardware, software, or a combination of hardware and software. The present invention can be realized in a centralized fashion in at least one computer system, or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods of the present invention is suited. A typical combination of hardware and software could be a general purpose computer system with a computer program that, when being loaded and executed, controls the computer system such that it carries out the methods described herein.

The present invention may also be implemented by a computer program product, comprising all the features enabling the implementation of the methods of the invention, when loaded in a computer system. The computer program in this document refers to: any expression, in any programming language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to other languages, codes or symbols; b) reproduced in a different format.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a general type touch-sensitive screen automatic checkout device which characterized in that includes: the device comprises a conversion joint connected with a touch screen, a route selection switch circuit connected with the conversion joint, a parameter detection module communicated with the route selection switch circuit, and a controller used for controlling the parameter detection module to perform parameter detection;

the route selection switch circuit comprises a plurality of route selection units, each channel of the route selection units corresponds to the induction wiring terminal of the touch screen one by one, and each channel serial number corresponds to each induction wiring terminal address signal one by one; the controller gates two paths in different routing units based on the parameters to be detected so as to detect the parameters of the touch screen; the route selection unit comprises a plurality of route selection chips, and the route selection chips comprise a plurality of groups of route selection chips which are connected in parallel with one another, an X even route selection chip, an X odd route selection chip, a Y even route selection chip, a Y odd route selection chip, a first port route selection chip and a second port route selection chip;

2. The universal touch screen automatic detection device according to claim 1, wherein the parameter detection module is an LCR meter, and the LCR meter is used for detecting calibration of the touch screen, short circuit to ground of each sensing terminal, short circuit of adjacent sensing terminals, and sensing function.

3. The apparatus of claim 2, wherein the controller controls the first port routing chip and the second port routing chip to open and then open and calibrate the LCR table, and then controls the first port routing chip and the second port routing chip to short and then short and calibrate the LCR table.

4. The automatic detection device for the universal touch screen according to claim 2, wherein the controller controls the first port routing chip to gate to ground, gates each sensing terminal to the second port routing chip one by one according to the sensing terminal address signal, and detects the ground parameter of each channel in sequence by using the LCR meter to detect the ground short circuit of each sensing terminal.

5. The automatic detection device for the universal touch screen according to claim 2, wherein for each odd sensing terminal, the controller controls to gate the path from the odd sensing terminal to the first port routing chip through the sensing terminal address signal, gates each even sensing terminal to the path from the second port routing chip one by one according to the sensing terminal address signal, and detects the parameters of each path in sequence by using the LCR table to detect the short circuit between adjacent sensing terminal paths.

6. The device as claimed in claim 2, wherein the controller controls, for each X even-numbered sensing terminal, a path for gating the X even-numbered sensing terminal to the first port routing chip by the sensing terminal address signal, gates each X odd-numbered sensing terminal, each Y even-numbered sensing terminal, and a path for each Y odd-numbered sensing terminal to the second port routing chip one by one according to the sensing terminal address signal, and sequentially detects parameters of each path by using the LCR meter to detect the sensing between adjacent sensing terminals.

7. The automatic detection device of the universal touch screen according to any one of claims 2 to 6, wherein the routing chip is a 16-channel chip, and a one-to-one correspondence relationship between each channel serial number and each sensing terminal address signal is stored in the address table configuration information.

8. An automatic detection method for a universal touch screen, which is characterized by comprising the step of detecting parameters of the touch screen by using the automatic detection device for the universal touch screen according to any one of claims 1 to 7.

9. The method of claim 8, wherein the parameter detection comprises calibration of the touch screen, short-circuiting to ground of each sensing terminal, short-circuiting of adjacent sensing terminals, and sensing functions.