CN114253426A - Method for solving edge reflection of infrared touch pad - Google Patents
Method for solving edge reflection of infrared touch pad Download PDFInfo
- Publication number
- CN114253426A CN114253426A CN202111661004.0A CN202111661004A CN114253426A CN 114253426 A CN114253426 A CN 114253426A CN 202111661004 A CN202111661004 A CN 202111661004A CN 114253426 A CN114253426 A CN 114253426A
- Authority
- CN
- China
- Prior art keywords
- infrared
- filter strip
- infrared filter
- sand blasting
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005488 sandblasting Methods 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000002390 adhesive tape Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000006004 Quartz sand Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 238000005270 abrasive blasting Methods 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
Abstract
The invention provides a method for solving edge reflection of an infrared touch pad, which comprises the following steps: attaching one surface of the infrared filter strip with the width of 6.5mm to a metal plate by using an adhesive tape, wherein the surface of the infrared filter strip with the width of 8.5mm is opposite to the surface of the infrared filter strip with the width of 6.5mm, so as to complete the sand blasting position determination of the infrared filter strip; the mounting grooves on the opposite sides of the light filtering strips are shielded by adhesive tapes; fixing the metal plate adhered with the infrared filter strip in a working bin of a press-in dry sand blasting machine; one surface of the infrared filter strip which is subjected to sand blasting treatment and has the width of 8.5mm is exposed in the working bin, and the bin door of the press-in dry sand blasting machine is closed; because infrared filter strip is the plastics material, chooses for use quartz sand as the sandblast material, sets for the sandblast time for 120s, starts the dry sand blasting machine of forced type, reduces the marginal reflection influence of infrared filter strip, solves the "marginal reflection" phenomenon that the filter strip that exists of current product leads to, and then influences the touch precision of infrared pair transistor touch frame.
Description
Technical Field
The invention mainly relates to the field of filter strips, in particular to a method for solving edge reflection of an infrared touch pad.
Background
The infrared pair of tubes touch frame based on optics, through distributing paired infrared emission and receiving device around the screen, through whether detect that there is shielding thing between two tubes to discern the touch, because the light that infrared emission device sent is the face divergence formula, so the infrared light that the emitting device that is close to the corner sent can be reflected by the filter surface, and the reverberation can avoid shielding thing to be received by its infrared receiving device that corresponds, thereby leads to the system can not discern the shielding thing, and this kind of phenomenon is "edge reflection".
When a touch point exists between an emission lamp tube at the edge and a receiving tube at the edge corresponding to the emission lamp tube, light emitted by the emission lamp tube at the edge is still reflected by the surface of a filter strip at the edge of an infrared pair tube touch frame and then is received by the edge receiving tube corresponding to the emission lamp tube, so that the infrared touch frame cannot identify the touch point.
In addition, the method can only reduce the influence of the edge reflection to a certain extent, can not completely solve the problem of touch breakpoints caused by the edge reflection, and the phenomenon of the edge reflection still exists in the manufacturing process of products.
Disclosure of Invention
Problems to be solved by the invention
The invention provides a method for solving the edge reflection of an infrared touch pad, which is used for solving the technical problem that the touch precision of an infrared pair tube touch frame is influenced by the edge reflection phenomenon caused by a filter strip in the existing product in the background technology.
Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for solving edge reflection of an infrared touch pad comprises the following steps:
and (3) sticking one surface of the infrared filter strip with the width of 6.5mm on a metal plate by using an adhesive tape, wherein the surface of the infrared filter strip with the width of 8.5mm is opposite to the surface of the infrared filter strip with the width of 6.5mm, and thus the sand blasting position determination of the infrared filter strip is completed.
The mounting grooves on opposite sides of the light filter strip are shielded by the adhesive tape.
And fixing the metal plate adhered with the infrared filter strip in a working bin of a press-in dry sand blasting machine.
One surface of the infrared filter strip which is subjected to sand blasting treatment and has the width of 8.5mm is exposed in the working bin, and the bin door of the press-in dry sand blasting machine is closed.
Because infrared filtering strip is the plastics material, selects for use quartz sand as the abrasive blasting, sets for 120s with the sandblast time, starts the dry sand blasting machine of forced.
Furthermore, the infrared light passing rate of the infrared filter strip is 60% to 80%, and the two transversely opposite side surfaces of the infrared filter strip are a light inlet surface and a light outlet surface, wherein the widths of the light inlet surface and the light outlet surface are 8.5mm and 6.5mm respectively.
Furthermore, the outer surface of the light inlet surface is treated by adopting a sand blasting process, and the sand blasting mesh number of the light inlet surface adopts 60, 80, 100 and 120.
Furthermore, the outer surface of the light-emitting surface is a smooth surface.
Furthermore, mounting clamping grooves are formed in two longitudinally opposite side surfaces of the infrared filter strip, and the two longitudinally opposite side surfaces of the infrared filter strip maintain smooth surfaces.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention provides a method for solving the edge reflection of an infrared touch pad, which is characterized in that the device is used for reducing the edge reflection occurrence probability of the surface of an infrared filter strip, sand blasting is carried out on a light inlet surface with the width of 8.5mm of the infrared filter strip by changing the surface structure of the infrared filter strip, the surface reflectivity of the infrared filter strip is reduced, the infrared transmittance of the infrared filter strip with the changed surface structure is reduced from about 80% to 65% to 70%, the method is applied to batch products, and the problem of touch breakpoints of the products of the type caused by the edge reflection of the infrared touch pad is thoroughly solved from the use effect.
The invention provides a method for solving edge reflection of an infrared touch pad, solves the problem of insufficient manufacturing standardization of an infrared touch display through the device, improves the working stability of the existing infrared touch display, meets the low-temperature environment requirement of special display, has important reference significance for airborne and shipborne infrared touch displays, and is applied in batch at present.
Drawings
FIG. 1 is a schematic view of a sandblasting process for the structure of the novel infrared filter strip of the present invention;
FIG. 2 is a schematic diagram showing the comparison between the structure of the novel infrared filter strip of the present invention before and after sandblasting;
FIG. 3 is a cross-sectional view of the novel infrared filter strip structure of the present invention;
fig. 4 is an infrared light matrix distribution diagram of the novel infrared filter strip structure of the present invention.
Reference numerals
1-infrared filter strip; 2-a light inlet surface; 3-light emitting surface; 4-installing a clamping groove.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Examples
A method for solving edge reflection of an infrared touch pad comprises the following steps:
and (3) sticking one surface of the infrared filter strip 1 with the width of 6.5mm on a metal plate by using an adhesive tape, wherein the surface of the infrared filter strip 1 with the width of 8.5mm is opposite to the surface of the infrared filter strip 1 with the width of 6.5mm, and completing the sand blasting position determination of the infrared filter strip 1.
The mounting grooves on opposite sides of the light filter strip are shielded by the adhesive tape.
And fixing the metal plate adhered with the infrared filter strip 1 in a working bin of a press-in dry sand blasting machine.
One surface of the infrared filter strip 1 which is subjected to sand blasting treatment and has the width of 8.5mm is exposed in the working bin, and the bin door of the press-in dry sand blasting machine is closed.
Because infrared filtering strip 1 is the plastics material, chooses quartz sand for use as the abrasive blasting, sets for 120s with the sandblast time, starts the dry sand blasting machine of forced.
Referring to fig. 1 to 4, the infrared light transmittance of the infrared filter strip 1 is 60% to 80%, two lateral opposite sides of the infrared filter strip 1 are a light inlet surface 2 and a light outlet surface 3, wherein the widths of the light inlet surface 2 and the light outlet surface 3 are 8.5mm and 6.5mm, respectively, the infrared filter strip 1 with a changed surface structure is matched with the light inlet surface 2 and the light outlet surface 3, and the reflectivity is only about 8% under the conditions that the infrared light with the same wavelength and the incident angle are 8 °, so that the reduction of the surface reflectivity of the infrared filter strip 1 is completed.
The outer surface of the light inlet surface 2 is treated by adopting a sand blasting process, the sand blasting mesh number of the light inlet surface 2 adopts 60, 80, 100 and 120, and the actual working performance of the light inlet surface 2 of the infrared light filtering strip 1 adopting the sand blasting mesh number of 80 is shown due to the fact that the sand blasting mesh number is 60, 100 and 120 through testing the sand blasting treated infrared light filtering strip 1.
The outer surface of the light-emitting surface 3 is a smooth surface, and the light-emitting surface 3 of the infrared filter strip 1 is kept smooth and maintains light transmittance without sand blasting.
The installation clamping grooves 4 are formed in the two longitudinal opposite side surfaces of the infrared filter strip 1, the two longitudinal opposite side surfaces of the infrared filter strip 1 maintain smooth surfaces, the infrared filter strip 1 is quickly installed and used through the installation clamping grooves 4 in the two longitudinal opposite side surfaces of the infrared filter strip 1, and the installation clamping grooves 4 do not need sand blasting.
In the present embodiment, it is preferred that,
in order to meet the requirement that infrared rays with 940nm wave bands emitted from the infrared pair tubes normally penetrate through the infrared filter strip 1 on the influence of the surface reflectivity of the infrared filter strip 1 on emitting and receiving light beams in the existing product infrared pair tubes, sand blasting operations with the sand blasting meshes of 60, 80, 100 and 120 are respectively carried out on a light inlet surface 2 with the width of 8.5mm of the infrared filter strip 1 by changing the surface structure of the infrared filter strip 1, and the sand blasting meshes are optimal for 80 meshes after transmittance and surface reflectivity tests and actual use effects.
The infrared filter strip 1 with the changed surface structure has the reflectivity of only about 8 percent under the conditions that the infrared light with the same wavelength and the incident angle are 8 degrees, the reduction of the surface reflectivity of the infrared filter strip 1 is completed, the infrared transmittance of the infrared filter strip 1 with the changed surface structure is reduced from about 80 percent to 65 percent to 70 percent, the method is applied to batch products, and the problem of touch breakpoints of the products of the type caused by 'edge reflection' of the infrared touch pad is thoroughly solved from the using effect
Fig. 2 is a front view of the infrared filter strip 1 before and after the improvement, where 1 in fig. 2 is a front view after the improvement, and 2 in fig. 2 is a front view of the untreated infrared filter strip 1, and the PC material of the infrared filter strip 1 can be seen from fig. 2 that the surface gloss of the untreated infrared filter strip 1 is good, and the effect of 1 in fig. 2 can be obtained by performing sand blasting on the front surface of the infrared filter strip 1.
The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A method for solving edge reflection of an infrared touch pad is characterized in that: the method comprises the following steps:
the method comprises the following steps of (1) attaching one side, with the width of 6.5mm, of an infrared filter strip (1) to a metal plate by using an adhesive tape, wherein the side, with the width of 8.5mm, of the infrared filter strip (1) is opposite to the side, with the width of 6.5mm, of the infrared filter strip (1), and completing sand blasting position determination of the infrared filter strip (1);
the mounting grooves on the opposite sides of the light filtering strips are shielded by adhesive tapes;
fixing the metal plate adhered with the infrared filter strip (1) in a working bin of a press-in dry sand blasting machine;
one surface of the infrared filter strip (1) which is subjected to sand blasting treatment and has the width of 8.5mm is exposed in a working bin, and a bin door of the press-in dry sand blasting machine is closed;
because infrared filtering strip (1) is the plastics material, chooses for use quartz sand as the abrasive blasting, sets for 120s with the sandblast time, starts the dry sand blasting machine of forced.
2. The method of addressing edge reflections for an infrared touch pad of claim 1, wherein: the infrared light passing rate of the infrared light filtering strip (1) is 60-80%, the two transversely opposite side surfaces of the infrared light filtering strip (1) are a light inlet surface (2) and a light outlet surface (3), and the widths of the light inlet surface (2) and the light outlet surface (3) are 8.5mm and 6.5mm respectively.
3. The method of addressing edge reflections for an infrared touch pad of claim 2, wherein: the outer surface of the light inlet surface (2) is treated by adopting a sand blasting process, and the sand blasting mesh number of the light inlet surface (2) adopts 60, 80, 100 and 120.
4. The method of addressing edge reflections for an infrared touch pad of claim 2, wherein: the outer surface of the light emitting surface (3) is a smooth surface.
5. The method of addressing edge reflections for an infrared touch pad of claim 1, wherein: mounting clamping grooves (4) are formed in the two longitudinal opposite side faces of the infrared filter strip (1), and the two longitudinal opposite side faces of the infrared filter strip (1) maintain smooth surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111661004.0A CN114253426A (en) | 2021-12-31 | 2021-12-31 | Method for solving edge reflection of infrared touch pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111661004.0A CN114253426A (en) | 2021-12-31 | 2021-12-31 | Method for solving edge reflection of infrared touch pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114253426A true CN114253426A (en) | 2022-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111661004.0A Pending CN114253426A (en) | 2021-12-31 | 2021-12-31 | Method for solving edge reflection of infrared touch pad |
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| Country | Link |
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| CN (1) | CN114253426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895385A (en) * | 2022-06-29 | 2022-08-12 | 芜湖韩保光学新材料有限公司 | Optical protection film for reducing edge diffuse reflection |
-
2021
- 2021-12-31 CN CN202111661004.0A patent/CN114253426A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895385A (en) * | 2022-06-29 | 2022-08-12 | 芜湖韩保光学新材料有限公司 | Optical protection film for reducing edge diffuse reflection |
| CN114895385B (en) * | 2022-06-29 | 2023-10-31 | 芜湖韩保光学新材料有限公司 | Optical protection film for reducing diffuse reflection at edge |
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