CN202171793U - Infrared touch screen - Google Patents
Infrared touch screen Download PDFInfo
- Publication number
- CN202171793U CN202171793U CN2011202814129U CN201120281412U CN202171793U CN 202171793 U CN202171793 U CN 202171793U CN 2011202814129 U CN2011202814129 U CN 2011202814129U CN 201120281412 U CN201120281412 U CN 201120281412U CN 202171793 U CN202171793 U CN 202171793U
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- transmitting tube
- infrared transmitting
- infrared
- touch
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Abstract
One embodiment of the utility model discloses an infrared touch screen, belonging to the technical field of the infrared touch system. The infrared touch screen is designed to reduce the erroneous judgment of a touch point. The infrared touch screen comprises an infrared transmitting tube array, an infrared receiving tube array, a touch detection area and a processing circuit, wherein the infrared light from at least one infrared transmitting tube in the infrared transmitting tube array is received by at least one infrared receiving tube in the infrared receiving tube array; the infrared transmitting tube array comprises at last one infrared transmitting tube set along at least one detection direction and each infrared transmitting tube set comprises at least two infrared transmitting tubes with light emitting surfaces mounted towards different directions. The infrared touch screen has features of multi-point touch, simple structure, reduced ghost point and furthermore reduced erroneous judgment.
Description
Technical field
The utility model relates to infrared touch system or infrared touch panel field, relates in particular to the infrared touch panel that a kind of part infrared transmitting tube deflection is installed.
Background technology
Touch-screen has obtained using widely as a kind of human-computer interaction device simply and easily; Multiple touch screen technology has appearred in the market; Comprise resistance screen, capacitance plate, optical panel, infrared screen, surface acoustic wave screen, projected capacitive screen or the like; Wherein infrared touch panel, low cost and other advantages simple in structure because of it is applied to multiple occasion, for example, and ATM, POS machine, Subway automatic ticket issuing machine etc.In recent years; Development along with the infrared touch technology; The infrared multi-point touch technology also obtains fast development; The occasion of using is also more and more, and for example multiplayer, many people write etc. simultaneously, and be as shown in Figure 1; Be existing a kind of structural drawing of realizing the infrared touch panel of multiple point touching; Its basic structure is around touching surveyed area, infrared transmitting tube array 101 and infrared receiving tube array 102 to be installed, and all infrared transmitting tubes in the infrared transmitting tube array 101 and all vertical edge installation that touches surveyed area 103 of infrared receiving tube in the infrared receiving tube array 102, and infrared transmitting tube is corresponding one by one with infrared receiving tube; The infrared light of one of them infrared transmitting tube emission can be received also and can be received with its tiltedly right infrared receiving tube by the infrared receiving tube relative with it, can discern a plurality of touch points through on-axis rays with from the situation of blocking of axial ray.
The infrared touch panel that the inventor finds said structure is far away and touch point negligible amounts is more effective for decipherment distance, but for a fairly large number of situation in touch point or touch point of close together, owing to block mutually; Can produce the phenomenon of erroneous judgement, as shown in Figure 2, two touch point 201 distances are closer; Because the angle of divergence of the light of infrared transmitting tube emission is limited; The angle of inclination of light is less, through the be blocked crossing combination of light efficiency of horizontal direction and vertical direction, can produce two with the approaching ghost point 202 of touch point size; In practical application, be difficult to judge that these two points 202 are true touch point or terrible point, be easy to generate erroneous judgement.Through increasing the dispersion angle of infrared transmitting tube; That is to say to make the light of an infrared transmitting tube emission can shine wider scope, received, can reduce terrible point like this by more infrared receiving tube; And then reduce erroneous judgement, but the cost of infrared transmitting tube that adopts wide-angle is than higher.
Above-mentioned deficiency in view of multiple spot infrared touch panel existence at present need provide a kind of infrared multi-point touch screen that any structure element and cost just can reduce erroneous judgement that need not increase.
The utility model content
The purpose of the utility model provides a kind of infrared multi-point touch screen that any parts and cost just can reduce erroneous judgement that need not increase.
For achieving the above object, the embodiment of the utility model adopts following technical scheme:
A kind of infrared touch panel; Comprise infrared transmitting tube array, infrared receiving tube array, touch surveyed area and treatment circuit; Said infrared transmitting tube array and said infrared receiving tube array are installed in four edges of said touch surveyed area respectively; The infrared light of the infrared transmitting tube emission at least one said infrared transmitting tube array is received by the infrared receiving tube at least one said infrared receiving tube array; At least one detection side upwards, said infrared transmitting tube array comprises at least one infrared transmitting tube group, and each said infrared transmitting tube group comprises the infrared transmitting tube that at least two light-emitting areas are installed towards different directions.
According to an aspect of the utility model, said infrared transmitting tube array comprises at least two infrared transmitting tube groups.
According to an aspect of the utility model, each said infrared transmitting tube group comprises the infrared transmitting tube that at least three light-emitting areas are installed towards different directions.
According to the aspect of the utility model, each said infrared transmitting tube group comprise the infrared transmitting tube installed at the edge of at least one vertical said touch surveyed area, infrared transmitting tube and at least one that at least one acutangulates installation with the edge of said touch surveyed area along clockwise direction along counterclockwise and the edge of said touch surveyed area acutangulate the infrared transmitting tube of installation.
According to the aspect of the utility model, the infrared transmitting tube that acutangulates installation with the edge of said touch surveyed area along clockwise direction in each said infrared transmitting tube group with along counterclockwise and the edge of the said touch surveyed area infrared transmitting tube that acutangulates installation be positioned at the both sides of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area.
An aspect according to the utility model; Be positioned at a side of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area in each said infrared transmitting tube group along clockwise direction with infrared transmitting tube that the edge of said touch surveyed area acutangulates installation, and along counterclockwise and the edge of the said touch surveyed area infrared transmitting tube that acutangulates installation be positioned at the opposite side of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area.
According to the aspect of the utility model, each said infrared transmitting tube group comprise an infrared transmitting tube, that acutangulates installation with the edge of said touch surveyed area along clockwise direction along counterclockwise and the edge of said touch surveyed area acutangulate the infrared transmitting tube that the edge of infrared transmitting tube and a vertical said touch surveyed area of installation is installed.
According to the aspect of the utility model, the infrared transmitting tube that the edge of at least one vertical said touch surveyed area is installed is installed also between two adjacent said infrared transmitting tube groups.
According to an aspect of the utility model, for level or the vertical said infrared touch panel of placing, on horizontal and/or longitudinal direction, said infrared transmitting tube array comprises at least one infrared transmitting tube group.
Adopt the infrared touch panel of technique scheme; Be divided into a plurality of infrared transmitting tube groups to the infrared transmitting tube array, all contain the infrared transmitting tube that oriented at least two different directions are installed in each infrared transmitting tube group, can provide degree of tilt bigger light; If with such infrared transmitting tube group as a transmitter unit; Can enlarge the angle of divergence of this transmitter unit, the light that degree of tilt is bigger so just can pass the ghost point zone among Fig. 2, is divided into many less zones to ghost point zone; And the position at true touch point place does not have light penetration, therefore can be easy to identify true touch point.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of structural diagrams intention that realizes the infrared touch panel of multiple point touching in the prior art;
Fig. 2 is the synoptic diagram that produces the ghost point when having the touch point of two close together in the prior art;
Fig. 3 is first kind of embodiment of the utility model embodiment one;
Fig. 4 is second kind of embodiment of the utility model embodiment one;
Fig. 5 is the third embodiment of the utility model embodiment one;
Fig. 6 is the 4th kind of embodiment of the utility model embodiment one;
Fig. 7 is the 5th kind of embodiment of the utility model embodiment one;
Fig. 8 is the 6th kind of embodiment of the utility model embodiment one;
Fig. 9 is the 7th kind of embodiment of the utility model embodiment one;
Figure 10 bigger light in angle of inclination when having the touch point of two close together in one first kind of embodiment of the utility model embodiment passes the synoptic diagram in ghost point zone among Fig. 2;
Figure 11 is a kind of embodiment of the utility model embodiment two;
Figure 12 is a kind of embodiment of the utility model embodiment three;
Figure 13 is a kind of embodiment of the utility model embodiment four.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the utility model, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
Embodiment one
As shown in Figure 3; The utility model embodiment provides a kind of infrared touch panel; Comprise infrared transmitting tube array 101, infrared receiving tube array 102, touch surveyed area 103 and treatment circuit (not shown); Infrared transmitting tube array 101 is installed in four edges that touch surveyed area 103 respectively with infrared receiving tube array 102; The infrared light of each infrared transmitting tube emission is received by at least one infrared receiving tube; Among the figure in a lateral direction; Infrared transmitting tube array 101 comprises a plurality of infrared transmitting tube groups 302; Each infrared transmitting tube group 302 comprise infrared transmitting tube 3022 and one that the infrared transmitting tube installed at a vertical edge that touches surveyed area 103 3021, one acutangulate installation with the edge that touches surveyed area 103 along clockwise direction along counterclockwise and the edge that touches surveyed area 103 acutangulate the infrared transmitting tube 3023 of installation; Also be that each infrared transmitting tube group 302 comprises a light-emitting area over against touching infrared transmitting tube that surveyed area installs 3021, light-emitting area infrared transmitting tube 3022 installed of deflection (with respect to for the infrared transmitting tube 3021) certain angle and the infrared transmitting tube 3023 of light-emitting area deflection (for infrared transmitting tube 3021) certain angle installation to the right left; The infrared transmitting tube 3021 that wherein vertically touches the edge installation of surveyed area 103 is positioned at the centre of infrared transmitting tube group; Acutangulate the infrared transmitting tube 3022 of installation and be positioned at both sides along counter clockwise direction and the infrared transmitting tube 3023 that the edge that touches surveyed area 103 acutangulates installation with the edge that touches surveyed area 103 along clockwise direction, each infrared transmitting tube group 302 can be used as a transmitter unit.
The edge of above-mentioned touch surveyed area is meant the edge that the infrared transmitting tube array of the infrared transmitting tube that comprises tilting installation is positioned at; Describe for ease; The infrared transmitting tube 3021 that the vertical edge that touches surveyed area 103 is installed calls normal infrared transmitting tube 3021; Call clockwise infrared transmitting tube 3022 to the infrared transmitting tube 3022 that acutangulates installation with the edge that touches surveyed area 103 along clockwise direction, along counterclockwise and the edge of touch surveyed area 103 infrared transmitting tube 3023 that acutangulates installation call counterclockwise infrared transmitting tube 3023.
Preferably; In the front of first infrared transmitting tube group and the back of last infrared transmitting tube group a normal infrared transmitting tube 3021 is installed respectively; Between per two adjacent infrared transmitting tube groups 302 one normal infrared transmitting tube 3021 is installed also; Remaining is not distributed in the infrared transmitting tube that reaches between the infrared transmitting tube group 302 in the infrared transmitting tube group 302 and can freely installs; The infrared transmitting tube that reaches between the infrared transmitting tube group in the infrared transmitting tube group like this has the rule of arranging as follows: between the infrared transmitting tube that per two deflections are installed (infrared transmitting tube 3022 and infrared transmitting tube clockwise counterclockwise) a normal infrared transmitting tube 3021 is arranged all; Wherein infrared transmitting tube 3022 produces the light of wide-angle tilt left clockwise; Infrared transmitting tube 3023 produces the light of wide-angle tilt to the right counterclockwise; The oblique light ray irradiation that the light of normal infrared transmitting tube 3021 emissions can replenish the clockwise infrared transmitting tube 3022 that is positioned at its both sides and infrared transmitting tube 3023 emissions counterclockwise less than the place so that the infrared light of infrared transmitting tube array emission can shine whole touch surveyed area more equably.The size of the performance parameter of the size of the infrared transmitting tube 3022 and the deflection angle of counterclockwise infrared transmitting tube 3023 and infrared transmitting tube and touch surveyed area is confirmed clockwise, also can pass through experiment test, finds the best deflection angle of effect.
In fact, alternatively, between two adjacent infrared transmitting tube groups 302 a plurality of normal infrared transmitting tubes 3021 (like Fig. 4) can be installed also, normal infrared transmitting tube 3021 (like Fig. 5 and Fig. 6) also can be installed; Can comprise a plurality of normal infrared transmitting tubes 3021 (like Fig. 7) in each infrared transmitting tube group, also can comprise the counterclockwise infrared transmitting tube 3023 (like Fig. 8) of a plurality of clockwise infrared transmitting tubes 3022 and equal number; The number of the clockwise infrared transmitting tube that comprises in each infrared transmitting tube group 3022 and infrared transmitting tube 3023 counterclockwise also can (like Fig. 9) inequality; Preferably, the clockwise infrared transmitting tube 3022 of all in each infrared transmitting tube group is positioned at a side of normal infrared transmitting tube 3021, the opposite side of all are counterclockwise infrared transmitting tube 3023 is positioned at normal infrared transmitting tube 3021; Alternatively, the both sides of normal infrared transmitting tube 3021 have a clockwise infrared transmitting tube 3022 and counterclockwise infrared transmitting tube 3023 respectively at least; Alternatively; Also can comprise the infrared transmitting tube that at least three light-emitting areas are installed towards different directions in each infrared transmitting tube group; That is to say that the infrared transmitting tube of installing between clockwise infrared transmitting tube and the counterclockwise infrared transmitting tube in the infrared transmitting tube group also can be not orthogonal to the edge that touches surveyed area.Certainly; In practical application, comprise in each infrared transmitting tube group between 305 groups of the several normal infrared transmitting tubes 3021, several clockwise infrared transmitting tube 3022,3023, two adjacent infrared transmitting tubes of several counterclockwise infrared transmitting tube several normal infrared transmitting tubes 3021 are installed; Need confirm according to user's demand and the performance parameter of infrared transmitting tube (like the angle of divergence); Generally speaking, mounting means shown in Figure 3, light are more uniform; Just light is more even in the distribution that touches surveyed area, is a kind of preferred mode.
The utility model embodiment provides a kind of infrared touch panel, on the basis that does not increase any element, installs through being divided into the infrared transmitting tube in the infrared transmitting tube array three kinds of mounting means spaces; The infrared transmitting tube of at least one inclined in opposite directions is installed on the infrared transmitting tube both sides of normal mounting, and wherein the infrared transmitting tube of inclined in opposite directions installation can provide the bigger light in angle of inclination of left and right sides both direction, and the infrared transmitting tube of the infrared transmitting tube of normal mounting and both sides both direction deflection installation is to the left and right combined and is equivalent to a wide angle emitted element; The light of some wide-angle tilts is provided; Except the zone at true touch point place, other zone all can have light to pass basically, and is shown in figure 10 like this; The light of wide-angle tilt can pass the ghost point zone among Fig. 2; Become many to ghost point Region Segmentation, can't compare, be easy to be removed with true touch point than the zonule; Can significantly reduce the quantity of ghost point, and then the probability that reduces to judge by accident.
Embodiment two
Shown in figure 11; The another kind of infrared touch panel that provides for the utility model embodiment; In a lateral direction; Infrared transmitting tube in the infrared transmitting tube array 101 is normal mounting all; In a longitudinal direction; Infrared transmitting tube array 101 comprises a plurality of infrared transmitting tube groups 302; The arrangement mode of the infrared transmitting tube in each infrared transmitting tube group 302 is identical with embodiment one, comprise the infrared transmitting tube 3021 (normal infrared transmitting tube 3021) installed at least one vertical edge that touches surveyed area 103, infrared transmitting tube 3022 (infrared transmitting tube 3022 clockwise) that at least one acutangulates installation with the edge that touches surveyed area 103 along clockwise direction with at least one along counterclockwise and the edge that touches surveyed area 103 acutangulate the infrared transmitting tube 3023 (infrared transmitting tube 3023 counterclockwise) of installation, and normal infrared transmitting tube 3021 is clockwise between infrared transmitting tube 3022 and the counterclockwise infrared transmitting tube 3023; Preferably; The quantity of infrared transmitting tube 3022 is identical with the quantity of counterclockwise infrared transmitting tube 3023 clockwise in each infrared transmitting tube group 302, between two adjacent infrared transmitting tube groups normal infrared transmitting tube can be installed, and also can not install.
Embodiment three
Shown in figure 12; The another kind of infrared touch panel that provides for the utility model; Infrared transmitting tube array 101 horizontal or longitudinal direction comprises a plurality of infrared transmitting tube groups 302 among the figure; Each infrared transmitting tube group 302 comprises the infrared transmitting tube (being 3022, one counterclockwise infrared transmitting tubes 3023 of a clockwise infrared transmitting tube among Figure 12) that two light-emitting areas are installed towards the different directions deflection.Preferably, two deflections are installed between the infrared transmitting tube at least one normal infrared transmitting tube 3021 can be installed.Present embodiment is identical with embodiment two with embodiment one, and the infrared transmitting tube that deflection is installed can provide the light of big angle excursion, thereby reduces the generation of ghost point.
Embodiment four
Like Figure 13; The utility model embodiment provides another kind of infrared touch panel; On horizontal and vertical both direction; Infrared transmitting tube array 101 comprises a plurality of infrared transmitting tube groups 302, and the installation of the infrared transmitting tube in each infrared tube group 305 and arrangement mode and embodiment one, embodiment two are identical with embodiment three.
Need to prove that the infrared transmitting tube that mounting means is identical in the embodiment of the utility model uses identical Reference numeral.
The above; Be merely the embodiment of the utility model; Do not represent the quality of embodiment, the protection domain of the utility model also is not limited to this, and the technician of any skilled is in the disclosed technical scope of the utility model; The variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of said claim.
Claims (10)
1. infrared touch panel; Comprise infrared transmitting tube array, infrared receiving tube array, touch surveyed area and treatment circuit; Said infrared transmitting tube array and said infrared receiving tube array are installed in four edges of said touch surveyed area respectively; The infrared light of the infrared transmitting tube emission at least one said infrared transmitting tube array is received by the infrared receiving tube at least one said infrared receiving tube array; It is characterized in that: at least one detection side upwards, said infrared transmitting tube array comprises at least one infrared transmitting tube group, and each said infrared transmitting tube group comprises the infrared transmitting tube that at least two light-emitting areas are installed towards different directions.
2. according to the described infrared touch panel of claim 1, it is characterized in that: said infrared transmitting tube array comprises at least two infrared transmitting tube groups.
3. according to the described infrared touch panel of claim 2, it is characterized in that: each said infrared transmitting tube group comprises the infrared transmitting tube that at least three light-emitting areas are installed towards different directions.
4. according to the described infrared touch panel of claim 3, it is characterized in that: each said infrared transmitting tube group comprise the infrared transmitting tube installed at the edge of at least one vertical said touch surveyed area, infrared transmitting tube and at least one that at least one acutangulates installation with the edge of said touch surveyed area along clockwise direction along counterclockwise and the edge of said touch surveyed area acutangulate the infrared transmitting tube of installation.
5. according to the described infrared touch panel of claim 4, it is characterized in that: the infrared transmitting tube that acutangulates installation with the edge of said touch surveyed area along clockwise direction in each said infrared transmitting tube group with along counterclockwise and the edge of the said touch surveyed area infrared transmitting tube that acutangulates installation be positioned at the both sides of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area.
6. according to the described infrared touch panel of claim 5; It is characterized in that: be positioned at a side of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area in each said infrared transmitting tube group along clockwise direction with infrared transmitting tube that the edge of said touch surveyed area acutangulates installation, and along counterclockwise and the edge of the said touch surveyed area infrared transmitting tube that acutangulates installation be positioned at the opposite side of the infrared transmitting tube of installing at the edge of vertical said touch surveyed area.
7. according to the described infrared touch panel of claim 6, it is characterized in that: each said infrared transmitting tube group comprise an infrared transmitting tube, that acutangulates installation with the edge of said touch surveyed area along clockwise direction along counterclockwise and the edge of said touch surveyed area acutangulate the infrared transmitting tube that the edge of infrared transmitting tube and a vertical said touch surveyed area of installation is installed.
8. according to each described infrared touch panel in the claim 1 to 7, it is characterized in that: the infrared transmitting tube that the edge of at least one vertical said touch surveyed area is installed also is installed between two adjacent said infrared transmitting tube groups.
9. according to each described infrared touch panel in the claim 1 to 7, it is characterized in that: for level or the vertical said infrared touch panel of placing, on horizontal and/or longitudinal direction, said infrared transmitting tube array comprises at least one infrared transmitting tube group.
10. according to the described infrared touch panel of claim 9, it is characterized in that: for level or the vertical said infrared touch panel of placing, on horizontal and/or longitudinal direction, said infrared transmitting tube array comprises at least one infrared transmitting tube group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202814129U CN202171793U (en) | 2011-05-06 | 2011-08-04 | Infrared touch screen |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120142806 | 2011-05-06 | ||
| CN201120142806.6 | 2011-05-06 | ||
| CN2011202814129U CN202171793U (en) | 2011-05-06 | 2011-08-04 | Infrared touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202171793U true CN202171793U (en) | 2012-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202814129U Expired - Fee Related CN202171793U (en) | 2011-05-06 | 2011-08-04 | Infrared touch screen |
Country Status (1)
| Country | Link |
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| CN (1) | CN202171793U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104156125A (en) * | 2014-08-15 | 2014-11-19 | 广州华欣电子科技有限公司 | Infrared touch screen lamp tube receiving and transmitting method and infrared touch screen |
| CN104238827A (en) * | 2013-06-13 | 2014-12-24 | 冠捷投资有限公司 | Optical touch panel |
| CN104503634A (en) * | 2014-12-02 | 2015-04-08 | 昆山国显光电有限公司 | Infrared touch control device and method |
| CN107967083A (en) * | 2017-12-18 | 2018-04-27 | 青岛海信电器股份有限公司 | The definite method and device of touch point |
| CN109799930A (en) * | 2019-01-15 | 2019-05-24 | 中山佳时光电科技有限公司 | A kind of 4K ultra high-definition display touch-control electronic blank |
-
2011
- 2011-08-04 CN CN2011202814129U patent/CN202171793U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238827A (en) * | 2013-06-13 | 2014-12-24 | 冠捷投资有限公司 | Optical touch panel |
| CN104156125A (en) * | 2014-08-15 | 2014-11-19 | 广州华欣电子科技有限公司 | Infrared touch screen lamp tube receiving and transmitting method and infrared touch screen |
| CN104503634A (en) * | 2014-12-02 | 2015-04-08 | 昆山国显光电有限公司 | Infrared touch control device and method |
| CN104503634B (en) * | 2014-12-02 | 2018-07-24 | 昆山国显光电有限公司 | A kind of infrared touch control device and method |
| CN107967083A (en) * | 2017-12-18 | 2018-04-27 | 青岛海信电器股份有限公司 | The definite method and device of touch point |
| CN107967083B (en) * | 2017-12-18 | 2021-06-01 | 海信视像科技股份有限公司 | Touch point determination method and device |
| CN109799930A (en) * | 2019-01-15 | 2019-05-24 | 中山佳时光电科技有限公司 | A kind of 4K ultra high-definition display touch-control electronic blank |
| CN109799930B (en) * | 2019-01-15 | 2022-03-29 | 中山佳时光电科技有限公司 | Clear touch-control whiteboard that shows of 4K superelevation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangzhou Hua Xin Electronic Science and Technology Co., Ltd. Assignor: Beijing UNITOP New Technology Co., Ltd. Contract record no.: 2014990000925 Denomination of utility model: Identification method of multi-touch of infrared touch screen Granted publication date: 20120321 License type: Common License Record date: 20141212 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Guangzhou Hua Xin Electronic Science and Technology Co., Ltd. Assignor: Beijing UNITOP New Technology Co., Ltd. Contract record no.: 2014990000925 Date of cancellation: 20160831 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20200804 |
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| CF01 | Termination of patent right due to non-payment of annual fee |