CN102880358A - Infrared touch screen - Google Patents
Infrared touch screen Download PDFInfo
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- CN102880358A CN102880358A CN2012103760750A CN201210376075A CN102880358A CN 102880358 A CN102880358 A CN 102880358A CN 2012103760750 A CN2012103760750 A CN 2012103760750A CN 201210376075 A CN201210376075 A CN 201210376075A CN 102880358 A CN102880358 A CN 102880358A
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Abstract
The invention discloses an infrared touch screen. The infrared touch screen comprises a display screen, a first infrared emitting pipe, a second infrared emitting pipe or a first reflector, and a parallelogram circuit board external frame which is arranged on the surface of the display screen; a first light transmitting reflector set and a second light transmitting reflector set are correspondingly arranged on two adjacent sides of the circuit board external frame; and a first infrared receiving pipe set and a second infrared receiving pipe set are respectively arranged on the other two adjacent sides of the circuit board external frame. With the adoption of the infrared touch screen disclosed by the invention, the function of the traditional infrared touch screen can be simply achieved by cooperation of two infrared emitting pipes or one infrared emitting pipe and one reflector; the quantity of the infrared emitting pipes is greatly reduced; the producing cost is reduced; the working stability of the whole infrared touch screen is improved; meanwhile, few infrared emitting pipes are adopted, so the resolution ratio of the infrared touch screen can be correspondingly improved without consideration of the size of the infrared emitting pipe.
Description
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Technical field
The present invention relates to a kind of touch screen technical field, relate in particular to a kind of infrared touch screen.
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Background technology
Existing infrared touch screen is to utilize the infrared ray matrix that gathers on X, the Y-direction to detect the also touch of consumer positioning.This infrared touch screen is in the front of display screen a circuit board housing to be installed, and arrange on four limits of circuit board housing infrared transmitting tube and with infrared transmitting tube infrared receiving tube one to one, because infrared transmitting tube and corresponding one by one with infrared transmitting tube, thereby form the infrared ray matrix that anyhow intersects.The user is when the touch display screen curtain, and finger will block anyhow two infrared rays through this position, thereby can judge the touch point in the position of display screen.But people's early stage idea thinks, infrared touch screen exists that resolution is low, touch manner is restricted and be subject to environmental interference and the technical limitation such as misoperation, thereby makes the infrared touch screen market of once fading out.Although the infrared touch screen of the second generation after this part has solved the problem that light disturbs, and the third generation and the 4th generation infrared touch screen also improve to some extent on resolution and the stability promoting, all not having has qualitative leap at key index or combination property.But the people who understands touch screen technology knows, infrared touch screen is owing to having and be not subjected to electric current, voltage and electrostatic interference, and the advantage of suitable rugged environment condition is so become the final development trend of touch screen product.And, adopt the touch screen of acoustics and other materialogy technology to have it to be difficult to separately the barrier of going beyond, for example single-sensor is impaired, aging, and touch interface is afraid of contaminated, the destructive use safeguarded numerous and diverse etc. problem.Infrared touch screen has been as long as really realized high stable performance and high resolving power, will substitute other technical products and becomes the touch-screen market mainstream.
Simultaneously, because the circuit board housing of existing infrared touch screen adopts four limits arrange infrared transmitting tube and this ad hoc structure of infrared receiving tube, each infrared transmitting tube will corresponding infrared receiving tube, reach higher resolution, must increase simultaneously the quantity of infrared transmitting tube and infrared receiving tube, so just increase the overall volume of infrared touch screen.But for portable, the volume of infrared touch screen generally all can not make excessive, therefore be limited by the volume (mainly being the volume of infrared transmitting tube) of infrared transmitting tube and infrared receiving tube owing to existing infrared touch screen, thereby limited the resolution of infrared touch screen.And too much infrared transmitting tube and infrared receiving tube have also improved the manufacturing cost of infrared touch screen and have affected the job stability of infrared touch screen.
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Summary of the invention
Technical matters to be solved by this invention provides a kind of volume that need not to be limited by infrared transmitting tube and infrared receiving tube, just can have higher resolution, and with low cost, the infrared touch screen of good operating stability.
In order to solve the problems of the technologies described above, the first technical scheme content that the present invention adopts is specific as follows:
A kind of infrared touch screen, it comprises display screen, the first infrared transmitting tube, the second infrared transmitting tube, be arranged on the display screen surface and the circuit board housing of parallelogram; On wherein two adjacent sides of described circuit board housing respectively correspondence be provided with the first transparency mirror group and the second transparency mirror group, be respectively equipped with the first infrared receiving tube group and the second infrared receiving tube group on the adjacent side of the two other of described circuit board housing; Described the first transparency mirror group is formed a line and first transparency mirror of center on same straight line forms along circuit board housing length direction by a plurality of with being spaced from each other, described the second transparency mirror group is in line and second transparency mirror of center on same straight line forms along circuit board housing Width by a plurality of with being spaced from each other, described the first infrared receiving tube group is comprised of a plurality of the first infrared receiving tubes, and described the first infrared receiving tube is corresponding one by one with described the first transparency mirror; Described the second infrared receiving tube group is comprised of a plurality of the second infrared receiving tubes, and described the second infrared receiving tube is corresponding one by one with described the second transparency mirror; Described the first infrared transmitting tube is located on one of them end of circuit board housing side at the first transparency mirror group place, and the infrared ray that sends of the first infrared transmitting tube passes successively the center of each the first transparency mirror and reflexes to by each first transparency mirror on the receiving end of each corresponding first infrared receiving tube of the first transparency mirror; Described the second infrared transmitting tube is located on one of them end of circuit board housing side at the second transparency mirror group place, and the infrared ray that sends of the second infrared transmitting tube passes successively the center of each the second transparency mirror and reflexes to by each second transparency mirror on the receiving end of each corresponding second infrared receiving tube of the second transparency mirror.
In order to form the anyhow intersection infrared ray matrix of a rule, preferably, described circuit board housing is rectangular, and each described first transparency mirror becomes 45 degree with circuit board housing Width, and each described second transparency mirror becomes 135 to spend with circuit board housing Width.
Preferably, described the first infrared transmitting tube is located at the front end of the circuit board housing side at the first transparency mirror group place, and described the second infrared transmitting tube is located at the left end of the circuit board housing side at the second transparency mirror group place.Perhaps, described the first infrared transmitting tube is located at the rear end of the circuit board housing side at the first transparency mirror group place, and described the second infrared transmitting tube is located at the left end of the circuit board housing side at the second transparency mirror group place; Again or, described the first infrared transmitting tube is located at the front end of the circuit board housing side at the first transparency mirror group place, described the second infrared transmitting tube is located at the right-hand member of the circuit board housing side at the second transparency mirror group place; Or described the first infrared transmitting tube is located at the rear end of the circuit board housing side at the first transparency mirror group place, and described the second infrared transmitting tube is located at the right-hand member of the circuit board housing side at the second transparency mirror group place.
For infra-red intensity that every the first transparency mirror reflects being consistent and the infra-red intensity that every the second transparency mirror reflects being consistent, preferably, the reflectivity of the first transparency mirror of described the first transparency mirror group increases successively along the ultrared transmission sequencing that the first infrared transmitting tube sends; The reflectivity of the second transparency mirror of described the second transparency mirror group increases successively along the ultrared transmission sequencing that the second infrared transmitting tube sends.
Compared with prior art, to have produced beneficial effect specific as follows for the first technical scheme of the present invention:
1, the infrared touch screen of the first technical scheme of the present invention mainly uses the first infrared transmitting tube to cooperate the first transparency mirror group that the infrared ray of the first infrared transmitting tube emission is assigned in each first infrared receiving tube equably, simultaneously, use the second infrared transmitting tube to cooperate the second transparency mirror group that the infrared ray of the second infrared transmitting tube emission is assigned in each second infrared receiving tube equably, thereby form an infrared ray matrix that anyhow intersects.Compare the traditional infrared touch screen and need the huge infrared transmitting tube of quantity, infrared touch screen of the present invention only need to use two infrared transmitting tubes just can realize the function of traditional infrared touch screen, greatly reduced the quantity of infrared transmitting tube, not only reduced production cost, improved the job stability of whole infrared touch screen, simultaneously because employed infrared transmitting tube quantity is little, need not to consider the volume of infrared transmitting tube, just can improve accordingly the resolution of infrared touch screen, satisfy user's user demand.
2 and, because infrared ray passes first transparency mirror and just reduces some strength at every turn, if the reflectivity of the first transparency mirror all equates, the intensity of the first transparency mirror institute reflected infrared will reduce step by step so, so the reflectivity of the first transparency mirror of the first transparency mirror group is set to increase successively along the ultrared transmission sequencing that the first infrared transmitting tube sends, and the infra-red intensity that every the first transparency mirror reflects is consistent; In like manner, the reflectivity of the second transparency mirror of the second transparency mirror group is set to increase successively along the ultrared transmission sequencing that the second infrared transmitting tube sends, and the infra-red intensity that every the second transparency mirror reflects is consistent.
In order to solve the problems of the technologies described above, the second technical scheme content of the present invention is specific as follows:
A kind of infrared touch screen, it comprises display screen, the first infrared transmitting tube, the first catoptron, be arranged on the display screen surface and the circuit board housing of parallelogram; On wherein two adjacent sides of described circuit board housing respectively correspondence be provided with the first transparency mirror group and the second transparency mirror group, be respectively equipped with the first infrared receiving tube group and the second infrared receiving tube group on the adjacent side of the two other of described circuit board housing; Described the first transparency mirror group is formed a line and first transparency mirror of center on same straight line forms along circuit board housing length direction by a plurality of with being spaced from each other, described the second transparency mirror group is in line and second transparency mirror of center on same straight line forms along circuit board housing Width by a plurality of with being spaced from each other, described the first infrared receiving tube group is comprised of a plurality of the first infrared receiving tubes, and described the first infrared receiving tube is corresponding one by one with described the first transparency mirror; Described the second infrared receiving tube group is comprised of a plurality of the second infrared receiving tubes, and described the second infrared receiving tube is corresponding one by one with described the second transparency mirror; Described the first infrared transmitting tube is located on one of them end of circuit board housing side at the first transparency mirror group place, and the infrared ray that sends of the first infrared transmitting tube passes successively the center of each the first transparency mirror and reflexes to by each first transparency mirror on the receiving end of each corresponding first infrared receiving tube of the first transparency mirror; Described the first catoptron is located at the connecting position place of the circuit board housing side at the first transparency mirror group and the second transparency mirror group place, and the infrared ray that the first infrared transmitting tube sends passes behind the center of each the first transparency mirror also successively by described the first mirror reflects on the second transparency mirror group, passes successively the center of each the second transparency mirror again and reflexes to by each second transparency mirror on the receiving end of each corresponding second infrared receiving tube of the second transparency mirror.
In order to form the anyhow intersection infrared ray matrix of a rule, preferably, described circuit board housing is rectangular, and each described first transparency mirror becomes 45 degree with circuit board housing Width, and each described second transparency mirror becomes 135 to spend with circuit board housing Width.
Preferably, described the first infrared transmitting tube is located at the front end of the circuit board housing side at the first transparency mirror group place; Described the first catoptron is located at the connecting position place of left end of the circuit board housing side at the rear end of circuit board housing side at the first transparency mirror group place and the second transparency mirror group place.
For infra-red intensity that every the first transparency mirror reflects being consistent and the infra-red intensity that every the second transparency mirror reflects being consistent, preferably, the reflectivity of the first transparency mirror of described the first transparency mirror group increases successively along the ultrared transmission sequencing that the first infrared transmitting tube sends; The reflectivity of the second transparency mirror of described the second transparency mirror group increases successively along the ultrared transmission sequencing that the first catoptron reflects.
Compared with prior art, to have produced beneficial effect specific as follows for the first technical scheme of the present invention:
1, the infrared touch screen of the second technical scheme of the present invention mainly uses the first infrared transmitting tube to cooperate the first transparency mirror group that the infrared ray of the first infrared transmitting tube emission is assigned in each first infrared receiving tube equably, simultaneously, use the first catoptron to cooperate the second transparency mirror group that the infrared ray of the first mirror reflects is assigned in each second infrared receiving tube equably, thereby form an infrared ray matrix that anyhow intersects.Compare the traditional infrared touch screen and need the huge infrared transmitting tube of quantity, infrared touch screen of the present invention only need to use an infrared transmitting tube to cooperate a catoptron just can realize the function of traditional infrared touch screen, greatly reduced the quantity of infrared transmitting tube, not only reduced production cost, improved the job stability of whole infrared touch screen, simultaneously because employed infrared transmitting tube quantity is little, need not to consider the volume of infrared transmitting tube, just can improve accordingly the resolution of infrared touch screen, satisfy user's user demand.
2 and, because infrared ray passes first transparency mirror and just reduces some strength at every turn, if the reflectivity of the first transparency mirror all equates, the intensity of the first transparency mirror institute reflected infrared will reduce step by step so, so the reflectivity of the first transparency mirror of the first transparency mirror group is set to increase successively along the ultrared transmission sequencing that the first infrared transmitting tube sends, and the infra-red intensity that every the first transparency mirror reflects is consistent; In like manner, the reflectivity of the second transparency mirror of the second transparency mirror group is set to increase successively along the ultrared transmission sequencing that the first catoptron reflects, and the infra-red intensity that every the second transparency mirror reflects is consistent.
The invention will be further described below in conjunction with the drawings and specific embodiments.
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Description of drawings
Fig. 1 is the structural representation of more preferably embodiment of the infrared touch screen of the first technical scheme of the present invention.
Fig. 2 is the structural representation of more preferably embodiment of the infrared touch screen of the second technical scheme of the present invention.
Wherein, the accompanying drawing mark of Fig. 1 is as follows: 1, the first infrared transmitting tube; 2, the second infrared transmitting tube; 3, circuit board housing; 4, the first transparency mirror group; 41, the first transparency mirror; 5, the second transparency mirror group; 51, the second transparency mirror; 6, the first infrared receiving tube group; 61, the first infrared receiving tube; 7, the second infrared receiving tube group; 71, the second infrared receiving tube.
The Reference numeral of Fig. 2 is as follows: 1, the first infrared transmitting tube; 2, the first catoptron; 3, circuit board housing; 4, the first transparency mirror group; 41, the first transparency mirror; 5, the second transparency mirror group; 51, the second transparency mirror; 6, the first infrared receiving tube group; 61, the first infrared receiving tube; 7, the second infrared receiving tube group; 71, the second infrared receiving tube.
And the direction of arrow among Fig. 1 and Fig. 2 is exactly ultrared travel path.
Embodiment
As shown in Figure 1, be the infrared touch screen of the first technical scheme of the present invention, it comprises display screen (not shown), the first infrared transmitting tube 1, the second infrared transmitting tube 2, be arranged on the display screen surface and the circuit board housing 3 of parallelogram; On wherein two adjacent sides of described circuit board housing 3 respectively correspondence be provided with the first transparency mirror group 4 and the second transparency mirror group 5, be respectively equipped with the first infrared receiving tube group 6 and the second infrared receiving tube group 7 on the adjacent side of the two other of described circuit board housing 3; Described the first transparency mirror group 4 is formed a line by a plurality of length directions along circuit board housing 3 with being spaced from each other and first transparency mirror 41 of center on same straight line forms, described the second transparency mirror group 5 is in line by a plurality of Widths along circuit board housing 3 with being spaced from each other and second transparency mirror 51 of center on same straight line forms, described the first infrared receiving tube group 6 is comprised of a plurality of the first infrared receiving tubes 61, and described the first infrared receiving tube 61 is corresponding one by one with described the first transparency mirror 41; Described the second infrared receiving tube group 7 is comprised of a plurality of the second infrared receiving tubes 71, and described the second infrared receiving tube 71 is corresponding one by one with described the second transparency mirror 51; Described the first infrared transmitting tube 1 is located on one of them end of circuit board housing side at the first transparency mirror group 4 places, and the infrared ray that sends of the first infrared transmitting tube 1 passes successively the center of each the first transparency mirror 41 and reflexes to by each first transparency mirror 41 on the receiving end of each the first transparency mirror 41 corresponding first infrared receiving tube 61; Described the second infrared transmitting tube 2 is located on one of them end of circuit board housing side at the second transparency mirror group 5 places, and the infrared ray that sends of the second infrared transmitting tube 2 passes successively the center of each the second transparency mirror 51 and reflexes to by each second transparency mirror 51 on the receiving end of each the second transparency mirror 51 corresponding second infrared receiving tube 71.
In order to form the anyhow intersection infrared ray matrix of a rule, particularly, described circuit board housing 3 is rectangular, and each described first transparency mirror 41 becomes 45 degree with the Width of circuit board housing 3, and each described second transparency mirror 51 becomes 135 degree with the Width of circuit board housing 3.
Particularly, described the first infrared transmitting tube 1 is located at the front end of the circuit board housing side at the first transparency mirror group 4 places, and described the second infrared transmitting tube 2 is located at the left end of the circuit board housing side at the second transparency mirror group 5 places.Perhaps, described the first infrared transmitting tube 1 is located at the rear end of the circuit board housing side at the first transparency mirror group 4 places, and described the second infrared transmitting tube 2 is located at the left end of the circuit board housing side at the second transparency mirror group 5 places; Again or, described the first infrared transmitting tube 1 is located at the front end of the circuit board housing side at the first transparency mirror group 4 places, described the second infrared transmitting tube 2 is located at the right-hand member of the circuit board housing side at the second transparency mirror group 5 places; Or described the first infrared transmitting tube 1 is located at the rear end of the circuit board housing side at the first transparency mirror group 4 places, and described the second infrared transmitting tube 2 is located at the right-hand member of the circuit board housing side at the second transparency mirror group 5 places.
For infra-red intensity that every the first transparency mirror 41 reflects being consistent and the infra-red intensity that every the second transparency mirror 51 reflects being consistent, particularly, the reflectivity of the first transparency mirror 41 of described the first transparency mirror group 4 increases successively along the ultrared transmission sequencing that the first infrared transmitting tube 1 sends; The reflectivity of the second transparency mirror 51 of described the second transparency mirror group 5 increases successively along the ultrared transmission sequencing that the second infrared transmitting tube 2 sends.For example, when the reflectivity of first the first transparency mirror 41 is 1%, the reflectivity of next piece the first transparency mirror 41 is 1.01%, reflectivity at next piece the first transparency mirror 41 is 1.02%, thereby make by the infrared ray of the first transparency mirror 41 reflections and guarantee uniform intensity, the ratio that finally can account for according to the ultrared intensity of the first transparency mirror 41 current incident infrared is adjusted reflecting rate.In like manner, the reflectivity set-up mode of the second transparency mirror 51 is similar to the reflectivity set-up mode of the first transparency mirror 41, no longer is described further at this.
Simultaneously, above-mentioned infrared touch screen, can also the original position of the first infrared receiving tube 61 and the second infrared receiving tube 71 arrange with the first infrared receiving tube 61 and the second infrared receiving tube 71 one to one the optical fiber (not shown) remove to replace the first corresponding infrared receiving tube 61 and the second infrared receiving tube 71, this moment, described the first infrared receiving tube 61 and the second infrared receiving tube 71 just were integrated in the infrared receiving box (not shown), a corresponding optical fiber wherein end receives the infrared ray that the first transparency mirror group 4 or the second transparency mirror group 5 reflect back as receiving end is corresponding, and the other end connects the first infrared receiving tube 61 or the second infrared receiving tube 71 corresponding in the described infrared receiving box as the transmission end.Utilize the optical fiber receiving infrared-ray signal, and the first infrared receiving tube 61 and the second infrared receiving tube 71 integrated, make the original position requirement on machining accuracy of the first infrared receiving tube 61 on the infrared touch screen and the second infrared receiving tube 71 lower, cut down finished cost, simultaneously because the less volume of optical fiber, can cooperate the infrared emission end structure of (comprising the first infrared transmitting tube 1, the second infrared transmitting tube 2, the first transparency mirror group 4 and the second transparency mirror group 5), further improve the precision of infrared touch screen.
And the receiving end of above-mentioned optical fiber also is provided with light diffusion end cap (not shown), makes the infrared ray generation diffuse reflection of rectilinear propagation, is more conducive to the propagation of infrared ray in optical fiber.
Need to prove, the Width of described circuit board housing 3 refers to the directions X among the figure, and the length direction of described circuit board housing 3 refers to the Y-direction among the figure.
As shown in Figure 2, be the infrared touch screen of the second technical scheme of the present invention, it comprises display screen (not shown), the first infrared transmitting tube 1, the first catoptron 2, be arranged on the display screen surface and the circuit board housing 3 of parallelogram; On wherein two adjacent sides of described circuit board housing 3 respectively correspondence be provided with the first transparency mirror group 4 and the second transparency mirror group 5, be respectively equipped with the first infrared receiving tube group 6 and the second infrared receiving tube group 7 on the adjacent side of the two other of described circuit board housing 3; Described the first transparency mirror group 4 is formed a line by a plurality of length directions along circuit board housing 3 with being spaced from each other and first transparency mirror 41 of center on same straight line forms, described the second transparency mirror group 5 is in line by a plurality of Widths along circuit board housing 3 with being spaced from each other and second transparency mirror 51 of center on same straight line forms, described the first infrared receiving tube group 6 is comprised of a plurality of the first infrared receiving tubes 61, and described the first infrared receiving tube 61 is corresponding one by one with described the first transparency mirror 41; Described the second infrared receiving tube group 7 is comprised of a plurality of the second infrared receiving tubes 71, and described the second infrared receiving tube 71 is corresponding one by one with described the second transparency mirror 51; Described the first infrared transmitting tube 1 is located on one of them end of circuit board housing side at the first transparency mirror group 4 places, and the infrared ray that sends of the first infrared transmitting tube 1 passes successively the center of each the first transparency mirror 41 and reflexes to by each first transparency mirror 41 on the receiving end of each the first transparency mirror 41 corresponding first infrared receiving tube 61; Described the first catoptron 2 is located at the connecting position place of the circuit board housing side at the first transparency mirror group 4 and the second transparency mirror group 5 places, and the infrared ray that the first infrared transmitting tube 1 sends also reflexes on the second transparency mirror group 5 by described the first catoptron 2 after passing successively the center of each the first transparency mirror 41, passes successively the center of each the second transparency mirror 51 again and reflexes to by each second transparency mirror 51 on the receiving end of each the second transparency mirror 51 corresponding second infrared receiving tube 71.
In order to form the anyhow intersection infrared ray matrix of a rule, particularly, described circuit board housing 3 is rectangular, and each described first transparency mirror 41 becomes 45 degree with the Width of circuit board housing 3, and each described second transparency mirror 51 becomes 135 degree with the Width of circuit board housing 3.
Particularly, described the first infrared transmitting tube 1 is located at the front end of the circuit board housing side at the first transparency mirror group 4 places; Described the first catoptron 2 is located at the connecting position place of left end of the circuit board housing side at the rear end of circuit board housing side at the first transparency mirror group 4 places and the second transparency mirror group 5 places.
For infra-red intensity that every the first transparency mirror 41 reflects being consistent and the infra-red intensity that every the second transparency mirror 51 reflects being consistent, particularly, the reflectivity of the first transparency mirror 41 of described the first transparency mirror group 4 increases successively along the ultrared transmission sequencing that the first infrared transmitting tube 1 sends; The reflectivity of the second transparency mirror 51 of described the second transparency mirror group 5 increases successively along the ultrared transmission sequencing that the first catoptron 2 reflects.For example, when the reflectivity of first the first transparency mirror 41 is 1%, the reflectivity of next piece the first transparency mirror 41 is 1.01%, reflectivity at next piece the first transparency mirror 41 is 1.02%, thereby make by the infrared ray of the first transparency mirror 41 reflections and guarantee uniform intensity, the ratio that finally can account for according to the ultrared intensity of the first transparency mirror 41 current incident infrared is adjusted reflecting rate.In like manner, the reflectivity set-up mode of the second transparency mirror 51 is similar to the reflectivity set-up mode of the first transparency mirror 41, no longer is described further at this.
Simultaneously, above-mentioned infrared touch screen, can also the original position of the first infrared receiving tube 61 and the second infrared receiving tube 71 arrange with the first infrared receiving tube 61 and the second infrared receiving tube 71 one to one the optical fiber (not shown) remove to replace the first corresponding infrared receiving tube 61 and the second infrared receiving tube 71, this moment, described the first infrared receiving tube 61 and the second infrared receiving tube 71 just were integrated in the infrared receiving box (not shown), a corresponding optical fiber wherein end receives the infrared ray that the first transparency mirror group 4 or the second transparency mirror group 5 reflect back as receiving end is corresponding, and the other end connects the first infrared receiving tube 61 or the second infrared receiving tube 71 corresponding in the described infrared receiving box as the transmission end.Utilize the optical fiber receiving infrared-ray signal, and the first infrared receiving tube 61 and the second infrared receiving tube 71 integrated, make the original position requirement on machining accuracy of the first infrared receiving tube 61 on the infrared touch screen and the second infrared receiving tube 71 lower, cut down finished cost, simultaneously because the less volume of optical fiber, can cooperate the infrared emission end structure of (comprising the first infrared transmitting tube 1, the first catoptron 2, the first transparency mirror group 4 and the second transparency mirror group 5), further improve the precision of infrared touch screen.
And the receiving end of above-mentioned optical fiber also is provided with light diffusion end cap (not shown), makes the infrared ray generation diffuse reflection of rectilinear propagation, is more conducive to the propagation of infrared ray in optical fiber.
Need to prove, the Width of described circuit board housing 3 refers to the directions X among the figure, and the length direction of described circuit board housing 3 refers to the Y-direction among the figure.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion should belong within the protection domain of claim of the present invention all.
Claims (8)
1. infrared touch screen is characterized in that: it comprises display screen, the first infrared transmitting tube, the second infrared transmitting tube, be arranged on the display screen surface and the circuit board housing of parallelogram; On wherein two adjacent sides of described circuit board housing respectively correspondence be provided with the first transparency mirror group and the second transparency mirror group, be respectively equipped with the first infrared receiving tube group and the second infrared receiving tube group on the adjacent side of the two other of described circuit board housing; Described the first transparency mirror group is formed a line and first transparency mirror of center on same straight line forms along circuit board housing length direction by a plurality of with being spaced from each other, described the second transparency mirror group is in line and second transparency mirror of center on same straight line forms along circuit board housing Width by a plurality of with being spaced from each other, described the first infrared receiving tube group is comprised of a plurality of the first infrared receiving tubes, and described the first infrared receiving tube is corresponding one by one with described the first transparency mirror; Described the second infrared receiving tube group is comprised of a plurality of the second infrared receiving tubes, and described the second infrared receiving tube is corresponding one by one with described the second transparency mirror; Described the first infrared transmitting tube is located on one of them end of circuit board housing side at the first transparency mirror group place, and the infrared ray that sends of the first infrared transmitting tube passes successively the center of each the first transparency mirror and reflexes to by each first transparency mirror on the receiving end of each corresponding first infrared receiving tube of the first transparency mirror; Described the second infrared transmitting tube is located on one of them end of circuit board housing side at the second transparency mirror group place, and the infrared ray that sends of the second infrared transmitting tube passes successively the center of each the second transparency mirror and reflexes to by each second transparency mirror on the receiving end of each corresponding second infrared receiving tube of the second transparency mirror.
2. infrared touch screen as claimed in claim 1, it is characterized in that: described circuit board housing is rectangular, and each described first transparency mirror becomes 45 degree with circuit board housing Width, and each described second transparency mirror becomes 135 degree with circuit board housing Width.
3. infrared touch screen as claimed in claim 1, it is characterized in that: described the first infrared transmitting tube is located at the front end of the circuit board housing side at the first transparency mirror group place, and described the second infrared transmitting tube is located at the left end of the circuit board housing side at the second transparency mirror group place.
4. such as any one described infrared touch screen of claim 1-3, it is characterized in that: the reflectivity of the first transparency mirror of described the first transparency mirror group increases successively along the ultrared transmission sequencing that the first infrared transmitting tube sends; The reflectivity of the second transparency mirror of described the second transparency mirror group increases successively along the ultrared transmission sequencing that the second infrared transmitting tube sends.
5. infrared touch screen is characterized in that: it comprises display screen, the first infrared transmitting tube, the first catoptron, be arranged on the display screen surface and the circuit board housing of parallelogram; On wherein two adjacent sides of described circuit board housing respectively correspondence be provided with the first transparency mirror group and the second transparency mirror group, be respectively equipped with the first infrared receiving tube group and the second infrared receiving tube group on the adjacent side of the two other of described circuit board housing; Described the first transparency mirror group is formed a line and first transparency mirror of center on same straight line forms along circuit board housing length direction by a plurality of with being spaced from each other, described the second transparency mirror group is in line and second transparency mirror of center on same straight line forms along circuit board housing Width by a plurality of with being spaced from each other, described the first infrared receiving tube group is comprised of a plurality of the first infrared receiving tubes, and described the first infrared receiving tube is corresponding one by one with described the first transparency mirror; Described the second infrared receiving tube group is comprised of a plurality of the second infrared receiving tubes, and described the second infrared receiving tube is corresponding one by one with described the second transparency mirror; Described the first infrared transmitting tube is located on one of them end of circuit board housing side at the first transparency mirror group place, and the infrared ray that sends of the first infrared transmitting tube passes successively the center of each the first transparency mirror and reflexes to by each first transparency mirror on the receiving end of each corresponding first infrared receiving tube of the first transparency mirror; Described the first catoptron is located at the connecting position place of the circuit board housing side at the first transparency mirror group and the second transparency mirror group place, and the infrared ray that the first infrared transmitting tube sends passes behind the center of each the first transparency mirror also successively by described the first mirror reflects on the second transparency mirror group, passes successively the center of each the second transparency mirror again and reflexes to by each second transparency mirror on the receiving end of each corresponding second infrared receiving tube of the second transparency mirror.
6. infrared touch screen as claimed in claim 5, it is characterized in that: described circuit board housing is rectangular, and each described first transparency mirror becomes 45 degree with circuit board housing Width, and each described second transparency mirror becomes 135 degree with circuit board housing Width.
7. infrared touch screen as claimed in claim 5, it is characterized in that: described the first infrared transmitting tube is located at the front end of the circuit board housing side at the first transparency mirror group place; Described the first catoptron is located at the connecting position place of left end of the circuit board housing side at the rear end of circuit board housing side at the first transparency mirror group place and the second transparency mirror group place.
8. such as any one described infrared touch screen of claim 5-7, it is characterized in that: the reflectivity of the first transparency mirror of described the first transparency mirror group increases successively along the ultrared transmission sequencing that the first infrared transmitting tube sends; The reflectivity of the second transparency mirror of described the second transparency mirror group increases successively along the ultrared transmission sequencing that the first catoptron reflects.
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| CN2012103760750A CN102880358A (en) | 2012-09-29 | 2012-09-29 | Infrared touch screen |
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| CN2012103760750A CN102880358A (en) | 2012-09-29 | 2012-09-29 | Infrared touch screen |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268173A (en) * | 2013-05-30 | 2013-08-28 | 京东方科技集团股份有限公司 | Infrared touch screen |
| CN103353812A (en) * | 2013-06-20 | 2013-10-16 | 长城信息产业股份有限公司 | Novel infrared touch screen optical glass system and touch detection method |
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| CN104991685A (en) * | 2015-08-05 | 2015-10-21 | 合肥鑫晟光电科技有限公司 | Infrared touch screen and touch detection method, and display apparatus |
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