CN211698766U - Infrared touch screen capable of realizing random size splicing of two liquid crystal screens - Google Patents
Infrared touch screen capable of realizing random size splicing of two liquid crystal screens Download PDFInfo
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- CN211698766U CN211698766U CN202020237575.6U CN202020237575U CN211698766U CN 211698766 U CN211698766 U CN 211698766U CN 202020237575 U CN202020237575 U CN 202020237575U CN 211698766 U CN211698766 U CN 211698766U
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Abstract
The utility model relates to the field of double-screen touch control of display screens, in particular to an infrared touch screen which can realize random size splicing of two liquid crystal screens, comprising a plane screen, wherein the plane screen comprises two horizontal frames and two vertical frames which are oppositely arranged, a first horizontal infrared sensing tube group and a second horizontal infrared sensing tube group which are independently operated are arranged in the horizontal frames, a first vertical infrared sensing tube group and a second vertical infrared sensing tube group which are independently operated are arranged in the vertical frames, the first horizontal infrared sensing tube group and the first vertical infrared sensing tube group are matched with each other to form the first infrared sensing tube group, and the second horizontal infrared sensing tube group are matched with each other to form the second infrared sensing tube group, the infrared touch screen with double-screen touch can provide touch coordinate information for two hosts at the same time.
Description
Technical Field
The utility model relates to a display screen double screen touches field, specifically is a can realize infrared touch-sensitive screen of two kinds of LCD screen random size concatenations.
Background
In order to meet various use requirements, the requirements of people for displays are increasingly high, for example, when drawing is performed by using drawing software, a certain material needs to be found out while the software is used, a window which can be used for reference materials needs to be opened, a single host and a single screen are difficult to meet the use requirements in many times, if two hosts are used, two operation contents are respectively executed, and the visual angle switching of a user is troublesome, so that the application is provided in the display field at present, the single display is provided with two HDMI display interfaces, each HDMI interface can be respectively connected with two liquid crystal screens, and the two liquid crystal screens are usually connected together in a splicing mode. The two liquid crystal screens can be connected with two different hosts through HDMI interfaces to respectively display different image contents, and the contents of the two hosts are simultaneously displayed through a single display screen. The two liquid crystal screens can be the same in size or different in size. The resolutions may be the same or different. Under there are many application occasions, this kind of screen of double screen concatenation also need can touch, nevertheless because this kind of special concatenation display needs two host computers to respond to the touch simultaneously, the size of two LCD screens, resolution ratio, concatenation seam size etc. are all inequality, realize the touch function relatively difficult, and under the condition that this type screen wants to realize touch-control function, operability and usability meeting greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a can realize two kinds of infrared touch-sensitive screens of LCD screen arbitrary size concatenation is provided, this technical scheme sets up first infrared sensing nest of tubes and second infrared sensing nest of tubes around the plane screen through adopting crisscross interval mode of arranging each other, adopt two sets of completely independent working circuit again, obtain the absolute coordinate of the output coordinate scope of two LCD screens, computer only need can realize accurate touch with output coordinate and resolution ratio linear mapping, the problem that present infrared display screen is difficult to realize that single display screen carries out the concatenation of two infrared touch-sensitive screens is solved.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides an infrared touch screen that can realize two kinds of LCD screen random dimension concatenations, includes the plane screen, the plane screen is including relative two horizontal frames and two vertical frames that set up be equipped with first horizontal infrared sensing nest of tubes and the horizontal infrared sensing nest of tubes of second of independent operation each other in the horizontal frame be equipped with the first vertical infrared sensing nest of tubes and the vertical infrared sensing nest of tubes of second of independent operation each other in the vertical frame, first horizontal infrared sensing nest of tubes and the first vertical infrared sensing nest of tubes cooperate and form first infrared sensing nest of tubes, and the horizontal infrared sensing nest of tubes of second cooperate and form the infrared sensing nest of tubes of second.
Optionally, one of them be equipped with first horizontal infrared emission nest of tubes and second horizontal infrared receiving nest of tubes in the horizontal frame, first horizontal infrared emission nest of tubes with second horizontal infrared receiving nest of tubes all with horizontal frame parallel arrangement, crisscross setting and certain clearance have between first horizontal infrared emission nest of tubes and the second horizontal infrared receiving nest of tubes, be equipped with first horizontal infrared receiving nest of tubes and second horizontal infrared emission nest of tubes in another horizontal frame, first horizontal infrared receiving nest of tubes with second horizontal infrared emission nest of tubes all with horizontal frame parallel arrangement, crisscross setting and certain clearance have between first horizontal infrared receiving nest of tubes and the second horizontal infrared emission nest of tubes, first horizontal infrared emission nest of tubes and first horizontal infrared receiving nest of tubes cooperate and form first horizontal infrared sensing nest of tubes, second horizontal infrared emission nest of tubes and second horizontal infrared receiving nest of tubes cooperate and form second horizontal infrared sensing tube And (4) grouping.
Optionally, one of them be equipped with first perpendicular infrared emission nest of tubes and second perpendicular infrared receiving nest of tubes in the vertical frame, first perpendicular infrared emission nest of tubes and second perpendicular infrared receiving nest of tubes all with vertical frame parallel arrangement, crisscross setting and certain clearance have between first perpendicular infrared emission nest of tubes and the second perpendicular infrared receiving nest of tubes, be equipped with first perpendicular infrared receiving nest of tubes and second perpendicular infrared emission nest of tubes in another vertical frame, first perpendicular infrared receiving nest of tubes with second perpendicular infrared emission nest of tubes all with vertical frame parallel arrangement, crisscross setting and certain clearance have between first perpendicular infrared receiving nest of tubes and the second perpendicular infrared emission nest of tubes, first perpendicular infrared emission nest of tubes and first perpendicular infrared receiving nest of tubes cooperate and form first perpendicular infrared sensing nest of tubes, second perpendicular infrared emission nest of tubes and second perpendicular infrared receiving nest of tubes cooperate and form second perpendicular infrared sensing nest of tubes.
Optionally, the first horizontal infrared transmitting tube group and the second horizontal infrared receiving tube group respectively include a plurality of first horizontal infrared transmitting tubes and a plurality of second horizontal infrared receiving tubes, the first horizontal infrared transmitting tubes and the second horizontal infrared receiving tubes are equal in number, the first horizontal infrared transmitting tubes and the second horizontal infrared receiving tubes are arranged in a crossing manner, the first horizontal infrared receiving tube group and the second horizontal infrared transmitting tube group respectively include a plurality of first horizontal infrared receiving tubes and a plurality of second horizontal infrared transmitting tubes, the first horizontal infrared receiving tubes and the second horizontal infrared transmitting tubes are equal in number, the first horizontal infrared receiving tubes and the second horizontal infrared transmitting tubes are arranged in a crossing manner, the first horizontal infrared transmitting tubes correspond to the first horizontal infrared receiving tubes one to one, and the corresponding horizontal infrared transmitting tubes and the first horizontal infrared receiving tubes are located on the same horizontal line, the second horizontal infrared transmitting tubes and the second horizontal infrared receiving tubes are in one-to-one correspondence, and the corresponding second horizontal infrared transmitting tubes and the corresponding second horizontal infrared receiving tubes are located on the same horizontal line.
Optionally, the first vertical infrared transmitting tube group and the second vertical infrared receiving tube group respectively include a plurality of first vertical infrared transmitting tubes and a plurality of second vertical infrared receiving tubes, the first vertical infrared transmitting tubes and the second vertical infrared receiving tubes are spaced from each other at equal intervals, the number of the first vertical infrared transmitting tubes and the number of the second vertical infrared receiving tubes are equal, the first vertical infrared transmitting tubes and the second vertical infrared receiving tubes are arranged in a crossed manner, that is, a second vertical infrared receiving tube is arranged between two first vertical infrared transmitting tubes, a first vertical infrared transmitting tube is arranged between two second vertical infrared receiving tubes, the first vertical infrared receiving tube group and the second vertical infrared transmitting tube group respectively include a plurality of first vertical infrared receiving tubes spaced from each other at equal intervals and a plurality of second vertical infrared transmitting tubes spaced from each other at equal intervals, the number of the first vertical infrared receiving tubes and the number of the second vertical infrared transmitting tubes are equal, the first vertical infrared receiving tubes and the second vertical infrared receiving tubes are arranged in a crossed mode, namely a second vertical infrared receiving tube is arranged between the two first vertical infrared receiving tubes, a first vertical infrared receiving tube is arranged between the two second vertical infrared receiving tubes, the first vertical infrared receiving tubes are in one-to-one correspondence with the first vertical infrared receiving tubes, one corresponding vertical infrared receiving tube and one corresponding first vertical infrared receiving tube are located on the same vertical line, the second vertical infrared receiving tube and one corresponding second vertical infrared receiving tube are located on the same vertical line.
Optionally, the first horizontal infrared transmitting tube group and the second horizontal infrared transmitting tube group are located on the inner side of the horizontal frame, the first vertical infrared transmitting tube group and the second vertical infrared transmitting tube group are located on the inner side of the vertical frame, the second horizontal infrared receiving tube group and the first horizontal infrared receiving tube group are located on the outer side of the horizontal frame, and the second vertical infrared receiving tube group and the first vertical infrared receiving tube group are located on the outer side of the vertical frame.
Optionally, the first infrared sensing tube group and the second infrared sensing tube group adopt two sets of working circuits with the same working principle, and each set of working circuit operates independently.
Optionally, the two sets of working circuits are respectively composed of an infrared emission tube driving circuit, a PT array original signal acquisition circuit, a signal conditioning circuit, an AD conversion circuit and a main control module circuit which are electrically connected in sequence.
Optionally, the signal conditioning circuit includes a signal waveform shaping circuit and a signal amplifying circuit, an output end of the PT array original signal acquisition circuit is electrically connected to an input end of the signal waveform shaping circuit, an output end of the signal waveform shaping circuit is electrically connected to an input end of the signal amplifying circuit, and an output end of the signal amplifying circuit is electrically connected to an input end of the AD conversion circuit.
Optionally, 8 second horizontal infrared receiving tubes, 8 first horizontal infrared receiving tubes, 8 second vertical infrared receiving tubes and 8 first vertical infrared receiving tubes form a group, so as to form the passive optical sensor.
Compared with the prior art, the utility model beneficial effect who has is:
the infrared touch screen is applied to a single display spliced by two liquid crystal screens with different sizes, each liquid crystal screen is connected with different computer hosts, a first horizontal infrared sensing tube group and a second horizontal infrared sensing tube group which independently operate with each other are arranged in a horizontal frame of a planar screen, a first vertical infrared sensing tube group and a second vertical infrared sensing tube group which independently operate with each other are arranged in a vertical frame, the first horizontal infrared sensing tube group and the first vertical infrared sensing tube group are matched to form a first infrared sensing tube group, the second horizontal infrared sensing tube group and the second horizontal infrared sensing tube group are matched to form a second infrared sensing tube group, the first infrared sensing tube group and the second infrared sensing tube group are arranged around the planar screen in a mutually staggered and spaced mode, two completely independent working circuits are adopted, and the two working circuits respectively control the first infrared sensing tube group and the second infrared sensing tube group, the decoder is controlled by an address line, which infrared transmitting tube is selected to be lightened at present, which infrared receiving tube is selected to be gated for receiving, each set of working circuit can completely and flexibly control the induction area to obtain the absolute coordinates of the output coordinate ranges of the two liquid crystal screens, the infrared touch screen with double-screen touch can simultaneously provide touch coordinate information for the two computer hosts, and the computer host corresponding to each liquid crystal screen can realize accurate touch only by linearly mapping the output coordinates and the resolution.
Drawings
FIG. 1 is a schematic diagram of an infrared touch screen in the prior art;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic diagram of the touch area dividing method of two liquid crystal panels in the present invention;
fig. 4 is a schematic block diagram of A, B two sets of working circuits in the present invention;
FIG. 5 is a circuit diagram of the mid-IR transmitting tube gating circuit of the present invention;
fig. 6 is a circuit diagram of the gating circuit of the mid-infrared receiving tube of the present invention.
The reference numbers in the figures are:
1-an infrared emission tube;
2-an infrared receiving tube;
3-a flat screen; 3 a-horizontal rim; 3 b-vertical rims;
4-a first set of horizontal infrared emitting tubes; 4 a-a first horizontal infrared emission tube;
5-a second horizontal infrared receiving tube group; 5 a-a second horizontal infrared receiving tube;
6-a first set of horizontal infrared receiving tubes; 6 a-a first horizontal infrared receiving tube;
7-a second set of horizontal infrared emitting tubes; 7 a-a second horizontal infrared emission tube;
8-a first set of vertical infrared emitting tubes; 8 a-a first vertical infrared emission tube;
9-a second set of vertical infrared receiving tubes; 9 a-a second vertical infrared receiving tube;
10-a first set of vertical infrared receiving tubes; 10 a-a first vertical infrared receiving tube;
11-a second set of vertical infrared emitting tubes; 11 a-a second vertical infrared emission tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The infrared touch screen is a convenient absolute positioning system for man-machine interaction and two-dimensional motion tracking, a user can control the operation of a computer only by using a certain position of the finger touch screen, and the infrared touch screen is widely applied to the fields of industrial control, portable equipment and the like. Among a plurality of touch screen technologies, infrared touch screens are always concerned by relevant scientific research and engineering technicians at home and abroad due to the advantages of high light transmittance, accurate positioning, strong stability and the like. It can be touched by finger, pen or any object which can block light, it is not easy to be damaged by man-made operation, its visual effect and positioning principle are superior to other touch screen technology, it is not interfered by current, voltage and static electricity, it has no need of adding any extra transparent surface layer in front of the display, it has no influence on the common optical parameters of the display, it can also adapt to the bad environmental condition, its principle is shown in figure 1, it is formed by infrared transmitting and receiving sensing elements mounted on the outer frame of the touch screen, the infrared transmitting sensing element is infrared transmitting tube 1, the infrared receiving sensing element is infrared receiving tube 2, for example, on two sides oppositely arranged on the rectangular plane screen, one side is arranged with infrared transmitting sensing element, the other side is arranged with infrared receiving sensing element, it correspondingly forms a horizontal-vertical crossed infrared matrix, that is, a set of infrared transmitting-receiving sensing sets is formed on two sides of the rectangular flat screen disposed opposite to each other, and the rectangular flat screen has two sets of such infrared transmitting-receiving sensing sets. When the infrared transmitting-receiving sensing group works, an infrared detection net is formed on the surface of the screen, and any touch object can change the infrared rays on the touch points to realize the touch screen operation. The infrared touch screen is implemented on the principle similar to the surface acoustic wave touch screen, and uses infrared emitting and receiving sensing elements. The elements form an infrared detection network on the surface of the screen, and an object (such as a finger) operated by touch can change the infrared ray of a touch point and further be converted into a coordinate position of touch to realize the response of the operation.
Because the double-screen display needs to be connected with two host computers at the same time, the size and the resolution ratio of the liquid crystal screen of each host computer are different, the common infrared touch screen is difficult to realize the function. Because the infrared touch screen needs to be provided with the infrared transmitting tube 1 and the infrared receiving tube 2 in the horizontal direction and the vertical direction, the infrared reflecting tube 1/the infrared receiving tube 2 in the vertical direction or the horizontal direction cannot be arranged between the two liquid crystal screens, and the double-spliced display in the prior art cannot be simultaneously provided with the two infrared touch screens.
Referring to fig. 2, the utility model discloses an infrared touch screen that can realize two kinds of LCD screen arbitrary size concatenations, including plane screen 3, plane screen 3 is the rectangle screen, including two horizontal frames 3a and two vertical frames 3b of relative setting, in this embodiment, horizontal frame 3a sets up for horizontal plane parallel, and vertical frame 3b sets up for the horizontal plane is perpendicular. A first horizontal infrared sensing tube group and a second horizontal infrared sensing tube group which operate independently from each other are arranged in the horizontal frame 3a, a first vertical infrared sensing tube group and a second vertical infrared sensing tube group which operate independently from each other are arranged in the vertical frame 3b, the first horizontal infrared sensing tube group and the first vertical infrared sensing tube group are matched to form the first infrared sensing tube group, and the second horizontal infrared sensing tube group are matched to form the second infrared sensing tube group.
Specifically, a first horizontal infrared transmitting tube group 4 and a second horizontal infrared receiving tube group 5 are arranged in one horizontal frame 3a, the first horizontal infrared transmitting tube group 4 and the second horizontal infrared receiving tube group 5 are both arranged in parallel with the horizontal frame 3a, the first horizontal infrared transmitting tube group 4 and the second horizontal infrared receiving tube group 5 are arranged in a staggered mode and have a certain gap, a first horizontal infrared receiving tube group 6 and a second horizontal infrared transmitting tube group 7 are arranged in the other horizontal frame 3a, similarly, the first horizontal infrared receiving tube group 6 and the second horizontal infrared transmitting tube group 7 are both arranged in parallel with the horizontal frame 3a, and the first horizontal infrared receiving tube group 6 and the second horizontal infrared transmitting tube group 7 are arranged in a staggered mode and have a certain gap. Be equipped with first perpendicular infrared emission nest of tubes 8 and second perpendicular infrared receiving nest of tubes 9 in one of them vertical frame 3b, first perpendicular infrared emission nest of tubes 8 and second perpendicular infrared receiving nest of tubes 9 all with vertical side frame 3b parallel arrangement, crisscross setting and certain clearance have between first perpendicular infrared emission nest of tubes 8 and the second perpendicular infrared receiving nest of tubes 9, be equipped with first perpendicular infrared receiving nest of tubes 10 and second perpendicular infrared emission nest of tubes 11 in another vertical frame 3b, the samely, first perpendicular infrared receiving nest of tubes 10 and second perpendicular infrared emission nest of tubes 11 all with vertical side frame 3b parallel arrangement, crisscross setting and certain clearance have between first perpendicular infrared receiving nest of tubes 10 and the second perpendicular infrared emission nest of tubes 11.
The first horizontal infrared transmitting tube group 4 and the second horizontal infrared receiving tube group 5 respectively comprise a plurality of first horizontal infrared transmitting tubes 4a with equal intervals and a plurality of second horizontal infrared receiving tubes 5a with equal intervals, the number of the first horizontal infrared transmitting tubes 4a and the number of the second horizontal infrared receiving tubes 5a are equal, the first horizontal infrared transmitting tubes 4a and the second horizontal infrared receiving tubes 5a are arranged in a crossed mode, namely, one second horizontal infrared receiving tube 5a is arranged between the two first horizontal infrared transmitting tubes 4a, and one first horizontal infrared transmitting tube 4a is arranged between the two second horizontal infrared receiving tubes 5 a. The first horizontal infrared receiving tube group 6 and the second horizontal infrared transmitting tube group 7 respectively comprise a plurality of first horizontal infrared receiving tubes 6a with equal intervals and a plurality of second horizontal infrared transmitting tubes 7a with equal intervals, the number of the first horizontal infrared receiving tubes 6a and the number of the second horizontal infrared transmitting tubes 7a are equal, the first horizontal infrared receiving tubes 6a and the second horizontal infrared transmitting tubes 7a are arranged in a crossed manner, namely, one second horizontal infrared transmitting tube 7a is arranged between the two first horizontal infrared receiving tubes 6a, and one first horizontal infrared receiving tube 6a is arranged between the two second horizontal infrared transmitting tubes 7 a. The first horizontal infrared transmitting tubes 4a are in one-to-one correspondence with the first horizontal infrared receiving tubes 6a, one corresponding horizontal infrared transmitting tube 4a and the first horizontal infrared receiving tube 6a are located on the same horizontal line, the second horizontal infrared transmitting tube 7a is in one-to-one correspondence with the second horizontal infrared receiving tube 5a, and the corresponding second horizontal infrared transmitting tube 7a and the second horizontal infrared receiving tube 5a are located on the same horizontal line.
Similarly, the first vertical infrared transmitting tube group 8 and the second vertical infrared receiving tube group 9 respectively include a plurality of first vertical infrared transmitting tubes 8a with equal distance from each other and a plurality of second vertical infrared receiving tubes 9a with equal distance from each other, the number of the first vertical infrared transmitting tubes 8a and the number of the second vertical infrared receiving tubes 9a are equal, the first vertical infrared transmitting tubes 8a and the second vertical infrared receiving tubes 9a are arranged in a crossed manner, that is, one second vertical infrared receiving tube 9a is arranged between two first vertical infrared transmitting tubes 8a, and one first vertical infrared transmitting tube 8a is arranged between two second vertical infrared receiving tubes 9 a. The first vertical infrared receiving tube group 10 and the second vertical infrared transmitting tube group 11 respectively comprise a plurality of first vertical infrared receiving tubes 10a with equal intervals and a plurality of second vertical infrared transmitting tubes 11a with equal intervals, the number of the first vertical infrared receiving tubes 10a and the number of the second vertical infrared transmitting tubes 11a are equal, the first vertical infrared receiving tubes 10a and the second vertical infrared transmitting tubes 11a are arranged in a crossed manner, namely, one second vertical infrared transmitting tube 11a is arranged between the two first vertical infrared receiving tubes 10a, and one first vertical infrared receiving tube 10a is arranged between the two second vertical infrared transmitting tubes 11 a. The first vertical infrared transmitting tubes 8a are in one-to-one correspondence with the first vertical infrared receiving tubes 10a, the corresponding one of the vertical infrared transmitting tubes 8a and the first vertical infrared receiving tubes 10a are located on the same vertical line, the second vertical infrared transmitting tubes 11a are in one-to-one correspondence with the second vertical infrared receiving tubes 9a, and the corresponding second vertical infrared transmitting tubes 11a and the second vertical infrared receiving tubes 9a are located on the same vertical line.
In the present embodiment, the infrared tubes that perform the transmission work are disposed inside the horizontal rim 3a and the vertical rim 3b, the infrared tubes that perform the reception work are disposed outside the horizontal rim 3a and the vertical rim 3b, that is, the first horizontal infrared-transmission tube group 4 and the second horizontal infrared-transmission tube group 7 are disposed inside the horizontal rim 3a, the first vertical infrared-transmission tube group 8 and the second vertical infrared-transmission tube group 11 are disposed inside the vertical rim 3b, the second horizontal infrared-reception tube group 5 and the first horizontal infrared-reception tube group 6 are disposed outside the horizontal rim 3a, and the second vertical infrared-reception tube group 9 and the first vertical infrared-reception tube group 10 are disposed outside the vertical rim 3 b.
When the light emitted by each infrared tube executing the emission work reaches the opposite frame, the light passes through the middle gap between the two infrared tubes executing the emission work at the inner side (front row) and enters the corresponding infrared tube executing the receiving work at the outer side (rear row), an infrared detection network is formed on the surface of the flat screen 3, and any touch object can change the infrared ray on the contact point to realize the touch screen operation. The infrared tubes for executing the transmitting work and the infrared tubes for executing the receiving work in each frame are provided with independent numbers, so that the software programming and control are facilitated, and the length and the width of the frame of the flat screen 3, the distance between two rows of infrared tube groups in each frame and the interval between the infrared tubes in the infrared tube groups are designed by matching the optical groups and the structural groups.
The first horizontal infrared sensing pipe group and the first vertical infrared sensing pipe group are matched to form a first infrared sensing pipe group, and the second horizontal infrared sensing pipe group are matched to form a second infrared sensing pipe group. The first infrared sensing tube group and the second infrared sensing tube group adopt A, B sets of working circuits. Each set of working circuits is completely independent. Each set of working circuit comprises an infrared transmitting tube and an infrared receiving tube respectively. In order to realize the double-screen touch function, A, B the infrared transmitting tubes and the infrared receiving tubes of the two sets of working circuits are installed around the flat screen 3 in a staggered and spaced arrangement mode, in this embodiment, the set a of working circuits controls the first infrared sensing tube group, namely the infrared transmitting tubes on the upper frame (horizontal frame 3a) and the right frame (vertical frame 3b) of the flat screen 3, and the infrared receiving tubes on the lower frame (horizontal frame 3a) and the left frame (vertical frame 3b) respectively; the B sets of working circuits control the second infrared sensing tube group, namely, the infrared transmitting tubes on the lower frame (the horizontal frame 3a) and the left frame (the vertical frame 3B) of the touch screen and the infrared receiving tubes on the upper frame (the horizontal frame 3a) and the right frame (the vertical frame 3B) of the touch screen respectively.
Referring to fig. 3, the infrared touch screen may be arbitrarily divided into two display areas, namely, a display area 1 and a display area 2. The two liquid crystal screens are connected in a splicing mode, the display Area is an operable (AA) Area corresponding to the liquid crystal screen, and the display Area 1 and the display Area 2 correspond to the AA areas of the two liquid crystal screens. The touch area of the touch screen generally needs to be overlapped with the AA area of the liquid crystal screen. The touch of the first display area 1 is realized by using the infrared transmitting tube and the infrared receiving tube which are controlled by the set A of working circuits and the corresponding control circuits, and the touch of the first display area 2 is realized by using the infrared transmitting tube and the infrared receiving tube which are controlled by the set B of working circuits and the corresponding control circuits. Since the first vertical infrared emission tubes 8a of the first vertical infrared emission tube group 8, which are labeled with a-H1, are one first vertical infrared emission tube 8a forward, the first vertical infrared emission tubes 8a of the first vertical infrared emission tube group 8, which are labeled with a-H2, are one first vertical infrared emission tube 8a backward, and fall outside the display area 1, therefore, (a-H1, a-H2) is a boundary in the horizontal direction of the display area 1, and also, (a-V1, a-V2) is a boundary in the vertical direction of the display area 1 because the first horizontal infrared emission tube 4a before the first horizontal infrared emission tube 4a of the a-V1 designation in the first horizontal infrared emission tube group 4 and the first horizontal infrared emission tube 4a toward the next first horizontal infrared emission tube 4a in the first horizontal infrared emission tube group 4 fall outside the display area 1. Because the set A of working circuits can control the lighting of each infrared transmitting tube and the gating of the infrared receiving lamp, the main control software takes the rectangle formed by (A-H1, A-H2), (A-V1 and A-V2) as an independent touch screen, and the output coordinate range of the infrared touch screen controlled by the set A of working circuits is (0-32767 ) absolute coordinates. The host corresponding to the display area 1 can realize accurate touch only by linearly mapping the output coordinates and the resolution.
Similarly, since the second vertical infrared emission tube 11a before the second vertical infrared emission tube 11a labeled with B-H1 in the second vertical infrared emission tube group 11 and the second vertical infrared emission tube 11a after the second vertical infrared emission tube 11a labeled with B-H2 in the second vertical infrared emission tube group 11 fall outside the display area 2, (B-H1, B-H2) is a boundary in the horizontal direction of the display area 2; also, since the second horizontal infrared emission tube 7a before the second horizontal infrared emission tube 7a is labeled with B-V1 in the second horizontal infrared emission tube group 7 and the second horizontal infrared emission tube 7a after the second horizontal infrared emission tube 7a is labeled with B-V2 in the second horizontal infrared emission tube group 7 fall outside the display area 2, (B-V1, B-V2) is a boundary in the vertical direction of the display area 2. Since the B set of working circuits can control the lighting of each infrared transmitting tube and the gating of the infrared receiving lamp, the main control software takes the rectangle formed by (B-H1, B-H2), (B-V1 and B-V2) as an independent touch screen. The output coordinate range of the infrared touch screen controlled by the set B of working circuits is (0-32767 ) absolute coordinates. The host corresponding to the display area 2 can realize accurate touch only by linearly mapping the output coordinates and the resolution.
Referring to fig. 4, A, B two sets of working circuits in the infrared touch screen mainly include an infrared transmitting tube driving circuit (not shown), a PT (infrared receiving tube) array original signal acquisition circuit, a signal conditioning circuit, an AD (analog-to-digital) conversion circuit, and a main control module circuit. The infrared transmitting tube driving module is driven by using a triode row-column gating pulse and controls the magnitude of driving current and the pulse period time according to the performance characteristics of the infrared transmitting tube. According to the scanning working principle, the infrared receiving tube gating circuit inputs original signals into the signal conditioning module one by one. Because the original signal is a weak current signal, the signal conditioning circuit comprises a signal waveform shaping circuit and a signal amplifying circuit, the current signal is firstly converted into a voltage signal, then the voltage signal is filtered and amplified, and the like, and finally a proper voltage signal is output. The analog-to-digital conversion circuit adopts a 10-bit high-precision AD converter, and the converted digital signals are input into the main control module circuit for software operation. And the MCU processor dynamically controls the infrared transmitting tube driving circuit and the gating circuit of the infrared receiving tube according to the touch state and the action. And finally, calculating the coordinate information and outputting the coordinate information through a USB interface or a serial port.
Referring to fig. 5, the principle of the infrared touch screen gating operation is to determine which transmitting tube is operating according to the form of address decoding, and all infrared transmitting tubes are turned on in turn during operation. The anode and cathode of the infrared transmitting tube are both provided with current source switches, and the current flowing through the infrared transmitting tube lamp is generally determined by a current limiting resistor. In the actual debugging process, the resistance value of the current-limiting resistor can be properly increased and decreased, the resistance value of the resistor is increased, and the current is reduced, so that the transmitting power of the infrared transmitting tube is reduced; and the resistance value of the resistor is reduced, so that the emission power of the infrared emission tube is increased.
Referring to fig. 6, in the present embodiment, 8 infrared receiving tubes are used as 1 group, and there are multiple groups of infrared receiving tubes, and these infrared receiving tubes are used as passive photo sensors to determine whether there is a shielding between the infrared emitting tube and the infrared receiving tube associated therewith according to the intensity of the infrared light sensed by the infrared receiving tubes. The multiple groups of infrared receiving tubes are also conducted in turn by adopting a decoding addressing mode, and 8 receiving tubes in the group are conducted simultaneously, so that external infrared light signals can be sensed simultaneously. But the generated 8 paths of optical voltage signals are alternately gated by 1 path of signals through the 8-to-1 analog switch and are sent to the signal processing circuit. The 8-channel analog switch and 8 0.1uF capacitors form a positive output high-pass filter, and voltage signals generated by dark current of the phototriode can be filtered. When the left side of the 0.1uF capacitor is switched between the receiving tube groups, a period of grounding time (only 8 paths of analog switches are closed) is needed to eliminate the effect of light pressure generated by the front group on the capacitor.
In this embodiment, the MCU processors of A, B two sets of working circuits may both adopt the main control chip of GD32F 103. In order to realize touch of two touch screens spliced in random sizes, A, B two sets of working circuits control an infrared transmitting tube and an infrared receiving tube of each set of infrared touch screen through a decoder. The main control chip GD32F103 controls the decoder through the address line to select which infrared transmitting tube is lighted at present and which infrared receiving tube is received in a gating mode, and therefore each set of infrared touch screen can completely and flexibly control the sensing area. And the output coordinate range of the infrared touch screen is absolute coordinates of (0-32767 ). The host corresponding to each liquid crystal screen can realize accurate touch only by linearly mapping the output coordinates and the resolution.
To sum up, compared with the prior art, the utility model has the advantages that:
the infrared touch screen is applied to a single display spliced by two liquid crystal screens with different sizes, each liquid crystal screen is connected with different computer hosts, a first horizontal infrared sensing tube group and a second horizontal infrared sensing tube group which independently operate with each other are arranged in a horizontal frame of a planar screen, a first vertical infrared sensing tube group and a second vertical infrared sensing tube group which independently operate with each other are arranged in a vertical frame, the first horizontal infrared sensing tube group and the first vertical infrared sensing tube group are matched to form a first infrared sensing tube group, the second horizontal infrared sensing tube group and the second horizontal infrared sensing tube group are matched to form a second infrared sensing tube group, the first infrared sensing tube group and the second infrared sensing tube group are arranged around the planar screen in a mutually staggered and spaced mode, two completely independent working circuits are adopted, and the two working circuits respectively control the first infrared sensing tube group and the second infrared sensing tube group, the decoder is controlled by an address line, which infrared transmitting tube is selected to be lightened at present, which infrared receiving tube is selected to be gated for receiving, each set of working circuit can completely and flexibly control the induction area to obtain the absolute coordinates of the output coordinate ranges of the two liquid crystal screens, the infrared touch screen with double-screen touch can simultaneously provide touch coordinate information for the two computer hosts, and the computer host corresponding to each liquid crystal screen can realize accurate touch only by linearly mapping the output coordinates and the resolution.
Claims (10)
1. The utility model provides an infrared touch screen that can realize two kinds of LCD screens random dimension concatenations, a serial communication port, includes plane screen (3), plane screen (3) are including relative two horizontal frames (3a) and two vertical frames (3b) that set up be equipped with first horizontal infrared sensing nest of tubes and the horizontal infrared sensing nest of tubes of second of independent operation each other in horizontal frame (3a) be equipped with the first vertical infrared sensing nest of tubes and the vertical infrared sensing nest of tubes of second of independent operation each other in vertical frame (3b), first horizontal infrared sensing nest of tubes and the first vertical infrared sensing nest of tubes cooperate and form first infrared sensing nest of tubes, and the horizontal infrared sensing nest of tubes of second cooperate and form the infrared sensing nest of tubes of second.
2. The infrared touch screen capable of splicing two liquid crystal screens in random sizes according to claim 1, wherein a first horizontal infrared transmitting tube set (4) and a second horizontal infrared receiving tube set (5) are arranged in one of the horizontal frames (3a), the first horizontal infrared transmitting tube set (4) and the second horizontal infrared receiving tube set (5) are both arranged in parallel with the horizontal frame (3a), the first horizontal infrared transmitting tube set (4) and the second horizontal infrared receiving tube set (5) are arranged in a staggered manner with a certain gap, a first horizontal infrared receiving tube set (6) and a second horizontal infrared transmitting tube set (7) are arranged in the other horizontal frame (3a), the first horizontal infrared receiving tube set (6) and the second horizontal infrared transmitting tube set (7) are both arranged in parallel with the horizontal frame (3a), first horizontal infrared receiving group (6) and second horizontal infrared transmitting group (7) are crisscross between setting up and have certain clearance, and first horizontal infrared transmitting group (4) and first horizontal infrared receiving group (6) cooperate and form first horizontal infrared sensing group, and second horizontal infrared transmitting group (7) and second horizontal infrared receiving group (5) cooperate and form second horizontal infrared sensing group.
3. The infrared touch screen capable of splicing two liquid crystal screens in random sizes as claimed in claim 2, wherein a first vertical infrared transmitting tube set (8) and a second vertical infrared receiving tube set (9) are arranged in one of the vertical frames (3b), the first vertical infrared transmitting tube set (8) and the second vertical infrared receiving tube set (9) are both arranged in parallel with the vertical frame (3b), the first vertical infrared transmitting tube set (8) and the second vertical infrared receiving tube set (9) are staggered with a certain gap, a first vertical infrared receiving tube set (10) and a second vertical infrared transmitting tube set (11) are arranged in the other vertical frame (3b), the first vertical infrared receiving tube set (10) and the second vertical infrared transmitting tube set (11) are both arranged in parallel with the vertical frame (3b), first perpendicular infrared receiving nest of tubes (10) and second perpendicular infrared transmitting nest of tubes (11) are crisscross to be set up and have certain clearance between, and first perpendicular infrared transmitting nest of tubes (8) and first perpendicular infrared receiving nest of tubes (10) cooperate and form first perpendicular infrared sensing nest of tubes, and second perpendicular infrared transmitting nest of tubes (11) and second perpendicular infrared receiving nest of tubes (9) cooperate and form second perpendicular infrared sensing nest of tubes.
4. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 3, wherein the first horizontal infrared transmitting tube group (4) and the second horizontal infrared receiving tube group (5) respectively comprise a plurality of first horizontal infrared transmitting tubes (4a) with equal distance from each other and a plurality of second horizontal infrared receiving tubes (5a) with equal distance from each other, the number of the first horizontal infrared transmitting tubes (4a) and the number of the second horizontal infrared receiving tubes (5a) are equal, the first horizontal infrared transmitting tubes (4a) and the second horizontal infrared receiving tubes (5a) are arranged in a crossing manner, the first horizontal infrared receiving tube group (6) and the second horizontal infrared transmitting tube group (7) respectively comprise a plurality of first horizontal infrared receiving tubes (6a) with equal distance from each other and a plurality of second horizontal infrared transmitting tubes (7a) with equal distance from each other, the quantity of the first horizontal infrared receiving tubes (6a) is equal to that of the second horizontal infrared transmitting tubes (7a), the first horizontal infrared receiving tubes (6a) and the second horizontal infrared transmitting tubes (7a) are arranged in a crossed mode, the first horizontal infrared transmitting tubes (4a) correspond to the first horizontal infrared receiving tubes (6a) one by one, one corresponding horizontal infrared transmitting tube 4a and the first horizontal infrared receiving tube (6a) are located on the same horizontal line, the second horizontal infrared transmitting tubes (7a) correspond to the second horizontal infrared receiving tubes (5a) one by one, and the corresponding second horizontal infrared transmitting tubes (7a) and the second horizontal infrared receiving tubes (5a) are located on the same horizontal line.
5. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 4, wherein the first vertical infrared transmitting tube group (8) and the second vertical infrared receiving tube group (9) respectively comprise a plurality of first vertical infrared transmitting tubes (8a) with equal distance from each other and a plurality of second vertical infrared receiving tubes (9a) with equal distance from each other, the number of the first vertical infrared transmitting tubes (8a) and the number of the second vertical infrared receiving tubes (9a) are equal, the first vertical infrared transmitting tubes (8a) and the second vertical infrared receiving tubes (9a) are arranged in a crossed manner, that is, one second vertical infrared receiving tube (9a) is arranged between two first vertical infrared transmitting tubes (8a), one first vertical infrared transmitting tube (8a) is arranged between two second vertical infrared receiving tubes (9a), and the first vertical infrared receiving tube group (10) and the second vertical infrared transmitting tube group (11) respectively comprise a plurality of second vertical infrared receiving tubes (9a) with equal distance from each other First vertical infrared receiving tubes (10a) with equal intervals and a plurality of second vertical infrared transmitting tubes (11a) with equal intervals, wherein the number of the first vertical infrared receiving tubes (10a) and the number of the second vertical infrared transmitting tubes (11a) are equal, the first vertical infrared receiving tubes (10a) and the second vertical infrared transmitting tubes (11a) are arranged in a crossed manner, namely, one second vertical infrared transmitting tube (11a) is arranged between the two first vertical infrared receiving tubes (10a), one first vertical infrared receiving tube (10a) is arranged between the two second vertical infrared transmitting tubes (11a), the first vertical infrared transmitting tubes (8a) are in one-to-one correspondence with the first vertical infrared receiving tubes (10a), one corresponding vertical infrared transmitting tube (8a) and the first vertical infrared receiving tube (10a) are positioned on the same vertical line, and the second vertical infrared transmitting tubes (11a) are in one-to-one correspondence with the second vertical infrared receiving tubes (9a), the corresponding second vertical infrared transmitting tube (11a) and the second vertical infrared receiving tube (9a) are positioned on the same vertical line.
6. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 5, wherein the first horizontal infrared emission tube group (4) and the second horizontal infrared emission tube group (7) are positioned on the inner side of the horizontal frame (3a), the first vertical infrared emission tube group (8) and the second vertical infrared emission tube group (11) are positioned on the inner side of the vertical frame (3b), the second horizontal infrared receiving tube group (5) and the first horizontal infrared receiving tube group (6) are positioned on the outer side of the horizontal frame (3a), and the second vertical infrared receiving tube group (9) and the first vertical infrared receiving tube group (10) are positioned on the outer side of the vertical frame (3 b).
7. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 6, wherein the first infrared sensing tube group and the second infrared sensing tube group adopt two sets of working circuits with the same working principle, and each set of working circuits operates independently.
8. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 7, wherein the two sets of working circuits are composed of an infrared emission tube driving circuit, a PT array original signal acquisition circuit, a signal conditioning circuit, an AD conversion circuit and a main control module circuit which are electrically connected in sequence.
9. The infrared touch screen of claim 8, wherein the signal conditioning circuit comprises a signal waveform shaping circuit and a signal amplifying circuit, the output terminal of the PT array original signal acquisition circuit is electrically connected to the input terminal of the signal waveform shaping circuit, the output terminal of the signal waveform shaping circuit is electrically connected to the input terminal of the signal amplifying circuit, and the output terminal of the signal amplifying circuit is electrically connected to the input terminal of the AD conversion circuit.
10. The infrared touch screen capable of realizing random size splicing of two liquid crystal screens as claimed in claim 9, wherein 8 second horizontal infrared receiving tubes (5a), first horizontal infrared receiving tubes (6a), second vertical infrared receiving tubes (9a) and first vertical infrared receiving tubes (10a) form a group to form a passive light sensor.
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| CN202020237575.6U CN211698766U (en) | 2020-03-02 | 2020-03-02 | Infrared touch screen capable of realizing random size splicing of two liquid crystal screens |
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| CN202020237575.6U CN211698766U (en) | 2020-03-02 | 2020-03-02 | Infrared touch screen capable of realizing random size splicing of two liquid crystal screens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126758A1 (en) * | 2020-12-17 | 2022-06-23 | 安徽鸿程光电有限公司 | Control method and apparatus for infrared touch screen and infrared touch screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126758A1 (en) * | 2020-12-17 | 2022-06-23 | 安徽鸿程光电有限公司 | Control method and apparatus for infrared touch screen and infrared touch screen |
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