CN111065995B - Touch screen device of infrared mode - Google Patents
Touch screen device of infrared mode Download PDFInfo
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- CN111065995B CN111065995B CN201780094778.5A CN201780094778A CN111065995B CN 111065995 B CN111065995 B CN 111065995B CN 201780094778 A CN201780094778 A CN 201780094778A CN 111065995 B CN111065995 B CN 111065995B
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
A touch screen device according to an embodiment of the present invention includes: an optical high-pass filter that allows only infrared rays greater than a specific wavelength band to pass; and a first optical band-pass filter that allows only infrared rays of a set wavelength band to pass through for an optical signal incident through the optical high-pass filter; wherein the first optical band-pass filter is inserted and fixed in the corresponding frame along the length squareA mounting groove in a shape of a Chinese character; the first optical band-pass filter and the optical high-pass filter are arranged at an angle of 5 DEG to 10 DEG with respect to the vertical or inclined direction of the optical axis of the infrared signal (L1).
Description
Technical Field
The present invention relates to an infrared touch panel device.
Background
A touch screen is a device that calculates an input signal from coordinates of a specific portion on a screen when the specific portion is touched by a hand or a tool directly or indirectly.
In the touch screen technology in the prior art, an infrared method of recognizing coordinates in a touch screen using an infrared sensor is mainly used for a large-sized touch screen, and an Opto-Matrix method is a typical method of the infrared method, that is, a plurality of light emitting elements and light receiving elements are arranged to transmit and receive simultaneously or sequentially, so that a light grid is formed on the upper portion of the screen, a finger or an article capable of blocking light is used for touching, and coordinates of a position where light reception is blocked are calculated to recognize a touched portion.
The infrared touch panel is suitable for a relatively large touch panel, can maintain excellent performance based on high reliability, and can be realized in a relatively inexpensive manner.
In view of recent market demands, although the size of a display panel of an infrared touch panel tends to be large, the size of a Bezel (Bezel) becomes narrower and narrower, and thus, related structures constituting the touch panel are all Slim (Slim). The touch panel having the narrow frame (Bezel) structure is not only installed in an indoor environment which is not affected by sunlight, but also installed in an interior of a building (similar to the outside) where the outside or the sunlight is irradiated more and more, and the use of a large screen of the touch screen is also increasing.
However, in a touch panel of a large screen, the interference wavelength (hereinafter referred to as "external interference light") from sunlight is greatly affected directly or indirectly, and the maximum detection value of an infrared receiving element becomes abnormally high, whereas the detection value (Signal) of an infrared receiving portion generated by a user's touch is significantly lower than the maximum detection value that becomes abnormally high due to the influence of the external interference light, and there is a problem that noise increases in the Signal-to-noise ratio (SNR) of an optical Signal transmitted by infrared rays, and erroneous operation or reduction in the operation speed is caused.
The root cause of the above problem is that the infrared filter employed by the infrared touch type touch panel having a narrow frame (Bezel) has a poor blocking (removing) effect of external interference light, because the larger the touch screen is, the larger the interference caused by the external interference light is.
In addition, in order to use the infrared touch screen device outdoors, it is necessary to have a waterproof function and a dustproof function, but there is no structural method capable of thoroughly solving the above problems, which brings about a great limitation to the use outdoors.
The waterproof and dustproof treatment of the infrared touch screen device in the prior art is mostly realized by using double-sided adhesive and silicon treatment between a structural object and a corresponding member. However, double-sided adhesives, silicon, and the like have many problems in terms of stable use in an outdoor environment for a long period of time due to poor durability against temperature change and long-term use, and have disadvantages such as poor productivity and assemblability, difficulty in maintenance when failure occurs, and the like.
The root cause of the above problems is that, for stable transmitting and receiving functions of the infrared transmitting and receiving element of the touch screen device of the infrared system, an infrared filter of a thin plastic structure is used in front of a frame in front of most touch module structures, but the sealing function between the infrared plastic filter and the touch module structures (an iron plate of aluminum or NCT structure) is very difficult to achieve. Even if the sealing function between the filter and the touch module structure is realized, most of the productivity is poor due to its complex structure, which is the greatest difficulty in realizing the waterproof function and the dustproof function of the infrared touch module.
In addition, since a touch panel device of a general infrared system performs a touch function by directly contacting a glass surface, a structure of adhesion to glass is indispensable, and such a structure of adhesion to glass is not problematic in an indoor environment. However, the adhesion and bonding structure with glass in an outdoor environment causes many problems in terms of convenience for users, touch functions, maintenance, and the like.
Specifically, in a touch panel device used in an outdoor environment, the temperature of the glass surface for touch is highly lowered due to high temperature or solar heat emitted from a display panel (LCD, LED, etc.), and a user needs to touch the glass surface at high temperature with a hand. In addition, foreign matters such as yellow sand, dust, rainwater, etc. are accumulated at the end portion of the touch screen device closely combined with the glass surface due to the change of the climate environment, resulting in abnormality of the touch function.
Prior art literature
Korean registered patent publication No. 10-1030077 (2011.04.19)
Korean patent laid-open publication No. 10-2008-0096975 (2008.11.04.)
Disclosure of Invention
Technical problem
The invention aims to overcome the defects of the prior art and provide an infrared touch screen device, which can greatly eliminate the interference of external interference light by using an optical band-pass filter only allowing specific wave bands to pass, thereby improving the touch recognition rate, reducing error operation and greatly improving waterproof and dustproof functions so as to be used outdoors.
Another object of the present invention is to provide an infrared touch panel device having an optical high-pass filter for eliminating the influence of external interference light, external scattered light, reflected light, and the like, which is improved in performance as compared with an optical high-pass filter used in the related art in an infrared touch panel device including an array of a plurality of infrared light emitting elements and light receiving elements, and an improved structure for mounting the optical high-pass filter.
Another object of the present invention is to provide an infrared touch panel device which can sufficiently eliminate the influence of external interference light, external scattered light, reflected light, and the like, and which can be used in an outdoor environment.
Another object of the present invention is to provide an infrared-type touch screen device which reflects a recent trend of narrowing a Bezel (Bezel), provides a narrow and long optical filter structure, and thus achieves high quality and low price by saving production costs while catering for a product market trend (trend).
Another object of the present invention is to provide an infrared touch panel device that can be used stably in an outdoor environment by using an innovative waterproof structure and dustproof structure that can realize a complete sealing function at a joint portion between a touch module and an optical filter, and thus prevent foreign substances such as external dust, snow water, and rainwater from flowing into the touch module.
Another object of the present invention is to provide an infrared touch panel device that can ensure a certain space in a joint portion between the touch panel device and the touch glass, thereby ensuring that the touch panel device can be stably used in an outdoor environment.
Embodiments of the present invention can achieve not only the above-described problems but also other problems not specifically described.
Means for solving the problems
To achieve the above object, rootAccording to an embodiment of the present invention, an infrared touch screen device includes: a frame 110 having a square shape for mounting a touch screen panel; a plurality of light transmitting elements 121 mounted on one of the lateral frames 110a of the frames 110 and transmitting infrared rays forward; an optical high-pass filter 133 mounted on one of the lateral frames 110a and disposed in front of the plurality of light-transmitting elements 121 so as to transmit only infrared rays larger than a set wavelength band among the infrared rays transmitted from the plurality of light-transmitting elements 121; a first optical band-pass filter 131 installed on the other lateral frame 110a and arranged in parallel with the optical high-pass filter 133, and allowing only infrared rays of a set wavelength band to pass through an optical signal incident through the optical high-pass filter 133; and a plurality of light receiving elements 132 mounted on the other lateral frame 110a and disposed on the rear side of the first optical bandpass filter 131, for receiving infrared rays passing through the first optical bandpass filter 131; wherein the first optical band-pass filter 131 is inserted and fixed in the corresponding frame along the length of the frameA mounting groove 112 in a letter shape; the first optical band-pass filter 131 and the optical high-pass filter 133 are provided in a direction perpendicular to the optical axis of the infrared signal L1.
In addition, in the infrared-mode touch screen device according to the embodiment of the present invention, the optical high-pass filter 133 is disposed to be inclined by 5 ° to 10 ° with respect to an axis perpendicular to the optical axis of the infrared signal L1, and the first optical band-pass filter 131 is disposed in a direction perpendicular to the optical axis of the infrared signal L1.
In addition, in the infrared touch screen device according to the embodiment of the present invention, the first optical band pass filter 131 and the optical high pass filter 133 are disposed to be inclined by 5 ° to 10 ° with respect to an axis perpendicular to an optical axis of infrared rays.
The infrared touch panel device according to the embodiment of the present invention further includes rubbers 150 and 151 provided between the optical high-pass filter 133 and a contact surface of a portion fixed to the frame and made of a rubber material or a silicon material having stretchability.
In the infrared touch panel device according to the embodiment of the present invention, the rubber 150 is provided to contact both side contact surfaces of the optical high-pass filter 133 at a portion where the optical high-pass filter 133 is fixed to the bezel.
In addition, the touch panel device of the infrared mode according to the embodiment of the present invention further includes: the frame 110 has a fastening screw hole 160 formed at one side of the free end; and a fastening screw 161 coupled to the fastening screw hole 160 to compress the frame 110, thereby preventing shrinkage of the rubber 150.
In the infrared touch panel device according to the embodiment of the present invention, the plurality of light-transmitting elements 121 and the optical high-pass filter 133 are mounted on one of the vertical frames 110b; the optical high-pass filter 133, the first optical band-pass filter 131, and the plurality of light receiving elements 132 are mounted on the other vertical frame 110b of the frames.
In the infrared touch panel device according to the embodiment of the present invention, the first and second optical bandpass filters 131 and 122 are formed of a polycarbonate material, and the entire filter has uniform optical filter characteristics by a vacuum vapor deposition process.
In addition, in the infrared touch screen device according to the embodiment of the present invention, a block module 181 is interposed between the touch glass 170 and the bezel 110 to form a space g between the touch glass 170 and the bezel 110.
The details of other embodiments will become more apparent from the following detailed description and the accompanying drawings.
Effects of the invention
In the infrared touch panel device according to the embodiment of the present invention configured as described above, in the infrared touch panel of the narrow frame (Bezel) structure, an optical band-pass filter that allows only a band from the light transmitting element to pass therethrough is inserted instead of the conventional infrared filter (high pass filter) to improve the performance of removing the external interference light, so that the interference amount of the external interference light is reduced by five times or more as compared with the conventional filter, and the improvement effect of removing the external interference light interference can be realized for installation use outdoors and in an environment similar to the outdoors.
In addition, according to one embodiment of the present invention, it is easy to improve touch speed and touch accuracy and to implement high-performance multi-touch by reducing interference of external interference light, and touch application control algorithm is reduced by removing or reducing external interference light signal interferometry algorithm, thereby saving CPU and auxiliary circuit materials (material costs) and development costs.
In addition, according to an embodiment of the present invention, by applying a structure in which a Bezel (Bezel) is easily inserted in a product, an external interference light blocking effect is improved, thereby improving productivity by improving production efficiency, and saving production costs by reducing defective products and the like.
In addition, according to an embodiment of the present invention, the waterproof function and the dustproof function are realized by completely blocking external foreign matters through rubber interposed between the bezel and the infrared filter, thereby providing an infrared-type touch screen device that can be stably used even in an outdoor environment.
In addition, according to an embodiment of the present invention, a certain space is secured between the infrared touch screen device and the touch glass, thereby user convenience and reliability of a touch function in an outdoor environment.
Drawings
FIG. 1 is an exemplary diagram of an infrared-mode touch screen device according to an embodiment of the present invention;
fig. 2 is an exemplary diagram of an installation state of an optical band pass filter in an infrared-mode touch screen device according to an embodiment of the present invention;
fig. 3 is a sectional view showing an installation state of each structure in the infrared-mode touch screen device according to the first embodiment of the present invention;
fig. 4 is a schematic view of an incident path on a receiving portion side in the infrared touch panel device shown in fig. 3;
fig. 5 is a sectional view showing an installation state of each structure in an infrared-mode touch screen device according to a second embodiment of the present invention;
fig. 6 is a sectional view showing an installation state of each structure in an infrared-mode touch screen device according to a third embodiment of the present invention;
fig. 7 is a sectional view showing an installation state of each structure in an infrared-mode touch screen device according to a fourth embodiment of the present invention;
fig. 8 is a sectional view of a rubber structure and an installation state of each structure in an infrared-mode touch screen device according to a fifth embodiment of the present invention;
fig. 9 is a sectional view of a rubber structure and an installation state of each structure in an infrared-mode touch panel device according to a sixth embodiment of the present invention;
FIG. 10 is a cross-sectional view of a rubber fixing structure according to a sixth embodiment of the present invention;
FIG. 11 is a schematic diagram showing a comparison of characteristics of an optical high pass filter and an optical band pass filter according to an embodiment of the present invention;
fig. 12 is a schematic view of a structure for securing a certain space with a touch glass surface according to an embodiment of the present invention.
Detailed Description
The advantages and features of the present invention and the method of advance will become apparent from the accompanying drawings and the embodiments described in detail below.
Various embodiments of the present invention are described in detail below with reference to the drawings to aid those skilled in the art in better understanding the present invention. The present invention may be embodied in a variety of different forms and is not limited to the embodiments described herein. For example, the touch module structure (one transmitting unit and one receiving unit) may be a non-quadrangular touch structure, and may be configured by only left and right or upper and lower frames.
In the drawings, for the purpose of more clearly explaining the present invention, descriptions thereof are omitted, and the same or similar structures throughout the specification are given the same reference numerals. In addition, a detailed description of the known technology is omitted.
In this specification, when a certain portion is said to "include" a certain member, unless the contrary is intended, other members are not excluded, but other members may be included. The terms "part," "… module," and the like in the specification refer to a unit that processes at least one function or action, and may be implemented by hardware or software, or a combination of hardware and software.
Description of the reference numerals
100: touch screen device
110: frame
110a: transverse frame
110b: vertical frame
112: mounting groove
114: gap(s)
120: transmitting unit
121: light-transmitting element
131. 122: first and second optical bandpass filters
130: receiving part
132: light receiving element
133: optical high-pass filter
140: PCB substrate
150: rubber material
160: fastening screw hole
161: fastening screw
170: touch glass
180: cover structure
181: block module
L1: infrared signal
L2: external interference light
Co: optical high-pass filter characteristic curve of the prior art
Cn: the characteristic curve of the optical high-pass filter of the invention
Cb: optical bandpass filter curve
Description of the embodiments
Next, an infrared touch panel device according to an embodiment of the present invention will be described with reference to fig. 1 to 11.
Fig. 1 is an exemplary diagram of an infrared-mode touch screen device according to an embodiment of the present invention. As shown in fig. 1, the infrared touch screen device 100 according to an embodiment of the present invention may include a bezel 110, two transmitting portions 120, and two receiving portions 130.
The frame 110 is formed in a quadrangular shape combining two horizontal frames 110a (X-axis) and two vertical frames 110b (Y-axis), and a touch panel (not shown) is mounted in a quadrangular internal space formed by the frame 110.
The transmitting part 120 may be mounted to one of the lateral frames 110a and one of the vertical frames 110b.
The receiving part 130 may be mounted to the other lateral frame 110a and the other vertical frame 110b.
The transmitting unit 120 and the receiving unit 130 may be provided so as to face each other, and the infrared signal L1 transmitted from the transmitting unit 120 may be incident on the receiving unit 130.
The transmitting unit 120 is a grid-shaped infrared ray formed by a plurality of light transmitting elements 121, which are disposed at intervals along the longitudinal direction of the frame in the horizontal frame 110a or the vertical frame 110b.
Each of the plurality of light transmitting elements 121 transmits an infrared signal L1 of a specific frequency band through the exposed portion of the horizontal frame 110a or the vertical frame 110b. The Light transmitting element 121 may be an LED (Light-Emitting Diode) element or a LD (Laser Diode) element, or the like.
As shown in fig. 11, the receiving part 130 may include: a first optical band-pass filter 131 filtering an infrared signal L1 of the same frequency band as that used by the light-transmitting element; the plurality of light receiving elements 132 receive the infrared signal L1 having the same frequency band as the frequency band used by the light transmitting element or a frequency band slightly wider than the same frequency band. In particular, the plurality of light receiving elements 132 may be infrared light receiving elements having a light peak and a bandwidth of ±10nm from the center wavelength.
The plurality of light transmitting elements 121 are provided inside the lateral frame 110a or the frames 110a and 110b at an installation interval along the longitudinal direction of the frame, and enter the first optical bandpass filter 131 through the exposed part of the frame to receive the infrared signal L1 of the specific frequency band optically filtered. For example, as is clear from the optical wavelength characteristics of the infrared receiver shown in fig. 11, the spread distribution of sunlight (i.e., the influence of sunlight) is small in the optical wavelength range of about 900nm to 1,000 nm. Therefore, the first optical bandpass filter 131 optically filters the region of least interference of sunlight and makes the region enter the light receiving element 132, and removes the influence of sunlight by the optical filtering method of the non-electric filtering method, thereby realizing a more effective and stable sunlight removing method.
In addition, according to the embodiment of the present invention, the optical filtering band of the first optical band-pass filter 131 is set according to the band of the optical signal transmitted by the light transmitting element 121, and the light receiving band of the light receiving element 132 is determined. This means that, when the optical signal transmitted from the light transmitting element 121 changes, the optical filtering range of the first optical bandpass filter 131 and the light receiving range of the light receiving element 132 also change.
In order to further reduce the influence of the external interference light L2, the transmitting unit 120 may further include a second optical bandpass filter 122 (see fig. 2) for filtering only the infrared signal L1 of a specific frequency band used in the light transmitting element 121, among the infrared signals L1 transmitted by the light transmitting element 121.
Next, a case where the second optical bandpass filter 122 (see fig. 2) is attached to the transmitting unit side will be described as an example.
Fig. 2 is a diagram showing an example of the installation state of an optical band pass filter in an infrared-mode touch screen device according to an embodiment of the present invention. As shown in fig. 2, a second optical bandpass filter 122 may be mounted on the transmitting part 120.
In general, in a conventional infrared touch panel device using an optical high-pass filter, when the region removed by the optical high-pass filter is viewed from the optical spectrum, the external interference light is usually passed in a frequency band larger than 700nm, and the external interference light is removed in a frequency band smaller than 600nm, so that the amount of interference of the removable external interference light is small. In addition, in a frequency band larger than 700nm, since the infrared receiver has a broadband receiving characteristic, there is a possibility that the interference of external interference light cannot be avoided because the external interference light removal rate is low in the conventional infrared touch panel using only the high pass filter.
As shown in fig. 2, the infrared touch panel device according to the embodiment of the present invention uses the first and second optical band pass filters 131 and 122 that allow only a specific wavelength band to pass.
The first and second optical bandpass filters 131 and 122 are formed in a narrow and long shape to prevent interference signals other than the light emission (light transmission) signal transmitted from the light transmission element 121 from being incident on the light receiving element 132, so that the adjacent light receiving element 132 or light transmission element 121 is positioned in the horizontal frame 110a or the vertical frame 110b.
For example, the first and second optical bandpass filters 131 and 122 are formed in a narrow and long stripe shape according to the length of the horizontal frame 110a or the vertical frame 110b, and are attached to the horizontal frame 110a or the vertical frame 110b.
The first and second optical bandpass filters 131 and 122 may be formed in two or three strips that are narrow and long to increase the solar light removal rate, and are attached to the horizontal frame 110a or the vertical frame 110b.
Of course, although the number of the first and second optical band pass filters 131 and 122 mounted on one frame is one, a plurality of the first and second optical band pass filters 131 and 122 may be mounted according to the manufacturing cost and other conditions, and the longer the length of the horizontal frame 110a or the vertical frame 110b, the larger the number of the first and second optical band pass filters 131 and 122 to be mounted.
In addition, when the first and second optical bandpass filters 131 and 122 are manufactured using a mixture of polycarbonate materials and a chemical bonding structure of a coating material capable of absorbing light energy of different wavelengths, as in the case of manufacturing an infrared optical filter in the related art, there is a possibility that the mixture components are uniformly distributed throughout the filter, and uniformity is lowered, and thus the optical filter cannot function in a high-wavelength band. In particular, if the lengths of the first and second optical bandpass filters 131 and 122 are made narrow and long as in the present invention, the above situation becomes more serious.
Therefore, the first and second optical bandpass filters 131 and 122 according to the embodiment of the invention are manufactured by a vacuum vapor deposition method, and in order to ensure the reliability of the manufacturing process and product of the vapor deposition target similar to those of the infrared touch panel in the related art, the optical bandpass filter structure allowing only a specific optical band to pass through is vapor deposited on a plastic-like (polycarbonate material or the like) material having a wide area similar to that of the related art optical bandpass filter. The overall length of the first and second optical band-pass filters 131 and 122 manufactured in the above-described manner may be, for example, about 0.1m to 5m, so as to be suitable for various touch screen sizes, and the whole touch screen pickup is uniformly realized by the optical filter characteristics that selectively allow only specific frequency bands to pass through. In this case, the wavelength of the light allowed to pass is the wavelength of the infrared ray band including the 940nm band which has been widely used recently, and can be changed and produced according to the required option of the touch panel device.
Fig. 3 is a sectional view showing an installation state of each structure in the infrared-mode touch screen device according to the first embodiment of the present invention, and is a sectional view of the lateral frame 110a shown in fig. 2 cut in the vertical direction. Of course, the installation state of each structure shown in fig. 3 may be realized in the same manner in the vertical frame 110b.
As shown in fig. 3, in the touch screen device 100 of the infrared mode according to the first embodiment of the present invention, one or more first and second optical band pass filters 131 and 122 may be installed in one horizontal frame 110a or one vertical frame 110b. Each of the horizontal frame 110a and the vertical frame 110b is formed with a frame formed along the longitudinal directionThe mounting groove 112 having a letter shape is formed in front of a portion where the light transmitting element 121 or the light receiving element 132 is formed, and a through groove is formed along the element direction or along an axis where the light transmitting element 121 or the light receiving element 132 is provided.
Thus, the first and second optical bandpass filters 131, 122 are insertedThe mounting groove 112 having a letter shape is fixed and mounted in a direction perpendicular to the optical axis of the infrared signal L1.
The light transmitting element 121 or the light receiving element 132 is installed in the inner space formed by the lateral frame 110a or the vertical frame 110b, and transmits the infrared rays filtered by the first optical band pass filter 122 through the slot or receives the infrared rays filtered by the first optical band pass filter 131.
In addition, in the inner space formed by the horizontal frame 110a or the vertical frame 110b, the PCB substrate 140 is fixedly installed, and the light transmitting element 121 or the light receiving element 132 is electrically connected to the PCB substrate 140 several times.
Light incident from the receiving portion side in the infrared-mode touch panel device according to the first embodiment of the present invention having the above-described structure will be described with reference to fig. 4. The infrared light transmitted from the light transmitting element 121 is also incident with external disturbance light L2 such as sunlight or an illumination lamp. Of course, most of the external disturbance light is filtered and removed by the optical band-pass filter, so that only the infrared signal L1 transmitted from the light transmitting element is incident on the light receiving element 1332.
However, if the intensity of the external disturbance light L2 including sunlight increases, it is possible to install the first and second optical bandpass filters 131 and 122The fine slit 114 of the mounting groove 112 having a letter shape is affected by the passage of the external interference light L2. In order to remove the influence of the external disturbance light L2 passing through the minute slit 114 of the mounting groove 112 described above, the following second to third embodiments of the present invention are provided.
Fig. 5 is a sectional view showing an installation state of each structure in the infrared-mode touch screen device according to the second embodiment of the present invention. As shown in fig. 5, the infrared touch screen device 100 according to the second embodiment of the present invention is a case where an optical high-pass filter 133 is added to the first embodiment of the present invention as shown in fig. 4. At this time, the optical high-pass filter 133 is mounted in front of the first and second optical band-pass filters 131 and 122 to be located at the outer side of the frame, and may be mounted closely to the first and second optical band-pass filters 131 and 122. Accordingly, the infrared ray incident on the light receiving element 132 is filtered for the first time by the optical high-pass filter, and is filtered for the second time by the first optical band-pass filter 131.
Here, the optical high-pass filter 133 preferably has a characteristic of removing at least a light wavelength smaller than 900nm and allowing a light wavelength larger than 900nm to pass therethrough, but may have a characteristic of removing a light wavelength smaller than 600nm, which is generally allowed to pass therethrough, in the related art.
Fig. 6 is a sectional view showing an installation state of each structure in the infrared-mode touch screen device according to the third embodiment of the present invention. As shown in fig. 6, the infrared touch panel device 100 according to the third embodiment of the present invention has the optical high-pass filter 133 mounted in front of the first and second optical band-pass filters 131 and 122 as in the second embodiment, but the optical high-pass filter 133 is mounted at a tilt setting angle with respect to the optical axis of the infrared signal L1. For example, the optical high-pass filter 133 may be inclined by 5 ° to 10 ° with respect to a vertical axis (an axis perpendicular to the optical axis of the infrared signal).
By providing the optical high-pass filter 133 inclined by 5 ° to 10 ° with respect to the vertical axis, interference of reflected signals at the edge portion of the touch frame can be reduced.
The optical high-pass filter 133 is provided so as to be inclined by 5 ° to 10 ° with respect to the vertical axis, and is designed to cope with a case where when light is blocked by a finger or the like in a dead angle area (corner portion) where the X axis and the Y axis meet, erroneous touch recognition is immediately caused by reflection of light transmitted from another axis adjacent thereto. That is, if the light is blocked at the corners near the left side portion of the horizontal frame 110a and the upper side portion of the vertical frame 110b, the light receiving elements 102 of the adjacent horizontal frame 110a receive light due to the reflection of the light from the light transmitting element 121 of the vertical frame 110b, and there is a possibility that an error is recognized. Therefore, tilting is implemented at the introduction portion of the filter to prevent reflected light from being directly introduced, thereby preventing the occurrence of the above-described error.
Fig. 7 is a sectional view showing an installation state of each structure in the infrared-type touch panel device according to the fourth embodiment of the present invention. As shown in fig. 6, in the third embodiment, only the optical high-pass filter 133 is provided inclined by 5 ° to 10 ° with respect to the vertical axis, but unlike this, in the fourth embodiment shown in fig. 7, the optical high-pass filter 133 and the first and second optical band-pass filters 131 and 122 are provided inclined by 5 ° to 10 ° with respect to the vertical axis at the same time, achieving the same effects as the third embodiment.
Fig. 8 is a sectional view showing a structure of a frame for realizing waterproofing and dust prevention, a rubber insertion structure, and the like in an infrared-mode touch screen device according to a fifth embodiment of the present invention.
As shown in fig. 8, the optical high-pass filter 133 and the first and second optical band-pass filters 131 and 122 may be fixed to each of the lateral frame 110a and the vertical frame 110bA groove in the shape of a letter. In addition, the rubber 150 may be disposed between the above-described frame, specifically, the lateral frame 110a or the vertical frame 110b, and the optical high-pass filter 133.
In particular, the rubber 150 may be provided in front of the optical high-pass filter 133, for example, in contact with a surface on the side where external light is introduced, and may be provided in plurality and provided on both sides of the optical high-pass filter 133 as shown in fig. 8.
* The rubber 150 is made of the same length as the horizontal frame 110a or the vertical frame 110b, and may be made of a stretchable material such as a rubber material or a silicon material.
Therefore, the rubber 150 can realize a waterproof function and a dustproof function.
Fig. 9 is a cross-sectional view showing a structure in which rubber 151 is used as both side contact surfaces as in the sixth embodiment, according to another embodiment of the fifth embodiment of the present invention.
As shown in fig. 8, a certain rubber 150 may be provided at a portion combined and fixed with the lateral frame 110a or the vertical frame 110b in front of the optical high-pass filter 133, retracted as shown in fig. 9, and another rubber 151 may be provided at the rear of the high-pass filter 133. That is, since the plurality of rubbers 150 and 151 are provided so as to be in contact with both side contact surfaces of the optical high-pass filter 133, the optical high-pass filter 133 is brought into close contact with the bezel 110 by the rubbers 150 and 151.
Fig. 10 is a sectional view showing a state of a structure or the like of a fixing screw as a prevention of shrinkage of rubber 150 in an infrared-type touch screen device according to a fifth embodiment of the present invention.
In the structure of the horizontal frame 110a or the vertical frame 110 in which the first and second optical band-pass filters 131 and 122 and the optical high-pass filter 133 are combined, the rubber 150 inserted in the front or both front and rear surfaces of the optical high-pass filter 133 has stretchability in terms of the characteristics of the material, and there is a possibility that shrinkage phenomenon may occur after the combination. Since the shrinkage phenomenon may generate a space in which foreign matter may flow into the horizontal frame 110a or the vertical frame 110b, in order to prevent the shrinkage phenomenon, as shown in fig. 9, fastening screw holes 160 to which fastening screws 161 are coupled are formed in the filter coupling surface of the horizontal frame 110a or the vertical frame 110b, so that the fastening screws 161 are fastened to prevent shrinkage of the rubber 150.
As shown in fig. 9, the fastening screw hole 60 may be formed at a free end side of the frame 110. Specifically, in the frame 110, fastening screw holes 160 are formed in a lower body, and coupling holes are formed in an upper body of the frame 100. In the coupling hole, the screw portion of the fastening screw 161 passes, and the head of the fastening screw 161 is caught. That is, the fastening screw 161 may penetrate the coupling hole of the upper body and be coupled to the fastening screw hole 160 of the lower body, and the frame 110 may not be arbitrarily opened or deformed depending on the fastening degree of the fastening screw 161, thereby maintaining the original sectional shape. In addition, by maintaining the cross-sectional shape of the frame 110, the rubbers 150, 151 are prevented from being excessively compressed or deformed.
Fig. 12 is a sectional view showing a combined state of the touch panel superimposing apparatus in which the cover structure 180 and the block module 181 are combined with the touch panel apparatus.
The cover structure 180 may firmly fix the block module 181 and the frame 110, and may improve a coupling structure with the touch glass 170, which may occur in an outdoor environment.
In addition, as shown in fig. 12, according to the touch screen device of the embodiment of the present invention, a space g between the touch glass 170 and the bezel 110 can be secured by the insertion block module 181.
The shape of the block module 181 described above may be changed according to options of the shape of the touch screen device.
The above-described embodiments are provided to illustrate the present invention and not to limit it, and it should be understood by those skilled in the art that the present invention may be modified, changed, or equivalent.
But is intended to be encompassed within the scope of the claims without departing from the spirit and scope of the invention.
Industrial applicability
The infrared-type touch panel device according to the embodiment of the present invention can be used as an input device in a display device or a touch-type information input device.
Claims (9)
1. An infrared-mode touch screen device, comprising:
a frame (110) which is quadrilateral and is provided with a touch screen panel;
a plurality of light-transmitting elements (121) which are mounted on one of the side frames (110) and transmit infrared rays forward;
an optical high-pass filter (133) which is mounted on one of the lateral frames (110 a) and is provided in front of the plurality of light-transmitting elements (121) so as to transmit only infrared rays larger than a set wavelength band among the infrared rays transmitted from the plurality of light-transmitting elements (121);
a first optical band-pass filter (131) which is mounted on the other lateral frame (110 a) of the frames (110) and is arranged in parallel with the optical high-pass filter (133), and which allows only infrared rays of a set wavelength band to pass through an optical signal incident through the optical high-pass filter (133); and
A plurality of light receiving elements (132) mounted on the other lateral frame (110 a) and disposed on the rear side of the first optical bandpass filter (131) to receive infrared rays passing through the first optical bandpass filter (131);
wherein the first optical band-pass filter (131) is inserted and fixed in the corresponding frame along the length of the frameA mounting groove (112) having a letter shape;
the first optical band-pass filter (131) and the optical high-pass filter (133) are disposed in a direction perpendicular to the optical axis of the infrared signal (L1).
2. The infrared touch screen device according to claim 1, wherein:
the optical high-pass filter (133) is disposed at an inclination of 5 DEG to 10 DEG with respect to an axis perpendicular to the optical axis of the infrared signal (L1), and the first optical band-pass filter (131) is disposed in a direction perpendicular to the optical axis of the infrared signal (L1).
3. The infrared touch screen device according to claim 1, wherein:
the first optical band-pass filter (131) and the optical high-pass filter (133) are disposed at an inclination of 5 DEG to 10 DEG with respect to an axis perpendicular to the optical axis of the infrared signal (L1).
4. The infrared touch screen device according to claim 1, wherein:
the optical high-pass filter (133) is provided between the optical high-pass filter and the contact surface of the frame, and is made of rubber (150, 151) having stretchability and made of rubber material or silicon material.
5. The infrared touch screen device according to claim 4, wherein:
the rubber (150) is provided at a portion of the optical high-pass filter (133) fixed to the frame so as to be in contact with both side contact surfaces of the optical high-pass filter (133).
6. The infrared touch screen device according to claim 4, further comprising:
a frame (110) with a fastening screw hole (160) formed at one side of the free end; and
And a fastening screw (161) coupled to the fastening screw hole (160) to compress the frame (110) so as to prevent shrinkage of the rubber (150).
7. The infrared touch screen device according to claim 1, wherein:
the plurality of light-transmitting elements (121) and the optical high-pass filter (133) are mounted on one of the vertical frames (110 b);
the optical high-pass filter (133), the first optical band-pass filter (131), and the plurality of light receiving elements (132) are mounted on the other vertical frame (110 b) of the frames.
8. The infrared touch screen device according to claim 1, wherein:
the first optical band-pass filter (131) has a uniform optical filter characteristic over the entire filter by a vacuum deposition process on a polycarbonate material.
9. The infrared touch screen device according to claim 1, wherein:
and a block module (181) interposed between the touch glass (170) and the frame (110) to form a space (g) between the touch glass (170) and the frame (110).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/KR2017/009985 WO2019054524A1 (en) | 2017-09-12 | 2017-09-12 | Infrared touch screen device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111065995A CN111065995A (en) | 2020-04-24 |
| CN111065995B true CN111065995B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780094778.5A Active CN111065995B (en) | 2017-09-12 | 2017-09-12 | Touch screen device of infrared mode |
Country Status (2)
| Country | Link |
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| CN (1) | CN111065995B (en) |
| WO (1) | WO2019054524A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210605673U (en) * | 2019-11-29 | 2020-05-22 | 广州视源电子科技股份有限公司 | Touch frame and touch screen comprising same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100804815B1 (en) * | 2007-09-10 | 2008-02-20 | (주)컴버스테크 | Touch screen using infrared camera to be hardly affected by external optical |
| CN101952793A (en) * | 2008-10-13 | 2011-01-19 | 好感新技术有限公司 | Touch screen adopting an optical module system using linear infrared emitters |
| KR101030077B1 (en) * | 2010-10-27 | 2011-04-19 | 김길선 | Infrared rays touch screen apparatus of which touch sensing accuracy is improved |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11338637A (en) * | 1998-05-25 | 1999-12-10 | Carol Touch Japan | Optical touch panel |
| KR20080096975A (en) * | 2007-04-30 | 2008-11-04 | 안영수 | Method for driving touch-screen |
| KR20100075327A (en) * | 2008-12-24 | 2010-07-02 | 엘지디스플레이 주식회사 | Touch type display device |
-
2017
- 2017-09-12 WO PCT/KR2017/009985 patent/WO2019054524A1/en active Application Filing
- 2017-09-12 CN CN201780094778.5A patent/CN111065995B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100804815B1 (en) * | 2007-09-10 | 2008-02-20 | (주)컴버스테크 | Touch screen using infrared camera to be hardly affected by external optical |
| CN101952793A (en) * | 2008-10-13 | 2011-01-19 | 好感新技术有限公司 | Touch screen adopting an optical module system using linear infrared emitters |
| KR101030077B1 (en) * | 2010-10-27 | 2011-04-19 | 김길선 | Infrared rays touch screen apparatus of which touch sensing accuracy is improved |
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| Publication number | Publication date |
|---|---|
| WO2019054524A1 (en) | 2019-03-21 |
| CN111065995A (en) | 2020-04-24 |
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