CN107145263B - Touch screen system using linear laser light source - Google Patents
Touch screen system using linear laser light source Download PDFInfo
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- CN107145263B CN107145263B CN201710188049.8A CN201710188049A CN107145263B CN 107145263 B CN107145263 B CN 107145263B CN 201710188049 A CN201710188049 A CN 201710188049A CN 107145263 B CN107145263 B CN 107145263B
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- 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
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- 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
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
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Abstract
A touch screen system adopting a linear laser light source relates to a touch screen. The touch panel comprises a touch panel and a microprocessor system, wherein the microprocessor system is connected with a touch position detection module for detecting the position of a touch point, the touch position detection module comprises an optical signal receiving head and a signal processing module, the optical signal receiving head is provided with a photosensitive element, and the photosensitive element is connected with the signal processing module; the optical signal receiving head comprises at least four filtering channels; one end of the filtering channel is provided with a light inlet, the other end of the filtering channel is provided with a photosensitive element, and the channel wall of the filtering channel has a shading function; the optical signal receiving head is arranged in front of the touch pad, the light inlets of at least four filtering channels of the optical signal receiving head face the touch pad, and corresponding optical signal receiving areas are formed on the touch pad. By adopting the technical scheme, the invention has the advantages of simple structure and low cost, and fewer devices can be used.
Description
The filing date of the original application of the divisional application is as follows: 7/6/2011, application numbers are: 2011101503644, the name is: the front of the touch pad is provided with a touch screen system of an optical signal receiving head.
Technical Field
The present invention relates to electronic devices, and particularly to a touch screen system.
Background
With the increasing development of multimedia technology, touch screen systems are widely used in telecommunication offices, banks, information inquiry of city streets, industrial control, multimedia teaching, etc., by the most convenient, simple and natural input means. By using the technology, the user can realize the operation only by lightly touching the pictures and texts on the display screen by fingers or other touch pieces, thereby leading the human-computer interaction to be more intuitive and greatly facilitating the user.
The existing touch screen system has various forms, wherein the infrared touch screen system has the advantages of no current, voltage and static interference, suitability for certain severe environmental conditions and the like compared with other touch screen systems. With almost overwhelming advantages, the market for other touch screen systems is gradually being dominated. However, the infrared touch screen system has a limited application environment due to the fact that a frame is added to a common screen, which affects the compactness of the structure. And the cost of the infrared touch screen system is still high, so that the infrared touch screen system is not convenient to be applied to a touch screen system with the size of more than 30 inches.
Disclosure of Invention
The present invention is directed to a touch screen system using a linear laser light source to solve the above-mentioned problems.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the touch screen system adopting the linear laser light source comprises a touch pad and a microprocessor system, wherein the microprocessor system is connected with a touch position detection module for detecting the position of a touch point;
the optical signal receiving head comprises at least four filtering channels; one end of the filtering channel is provided with a light inlet, the other end of the filtering channel is provided with the photosensitive element, and the channel wall of the filtering channel has a shading effect;
the optical signal receiving head is arranged in front of the touch pad, light inlets of at least four filtering channels of the optical signal receiving head face the touch pad, and corresponding optical signal receiving areas are formed on the touch pad.
The optical signal receiving head is arranged in front of the touch pad, namely the optical signal receiving head is arranged in front of the front surface of the touch pad, or the optical signal receiving head is arranged in front of the back surface of the touch pad;
the touch screen system adopting the linear laser light source further comprises a linear laser, the linear laser is arranged on one side of the touch pad, and the linear laser forms a laser emergent surface parallel to the touch pad in the touch range of the touch pad; when the touch piece touches the touch pad, the laser emergent surface is shielded to form an optical contact;
when an optical contact which can be identified by the touch position detection module is formed on the touch pad, an optical signal sent out by the optical contact is received by at least one photosensitive element in the touch position detection module, is processed by the signal processing module to generate a touch signal, and transmits the touch signal to the microprocessor system; and the microprocessor system regards that the optical contact is positioned in an optical signal receiving area corresponding to an optical inlet of the filtering channel where the photosensitive element receiving the optical signal is positioned, and associates the optical signal receiving area with the touch panel or a picture displayed on the touch panel.
The photosensitive element receives light rays in the area towards the light inlet, so that an effective light signal receiving area is formed in front of the light inlet. And the photosensitive element in the filtering channel receives the optical signal in the optical signal receiving area through the light inlet. Light signals on the touch panel outside the light signal receiving area are received by the light sensitive elements very little, or even not at all, so that the light sensitive elements are not responsive to light signals outside the light signal receiving area.
The design is particularly suitable for controlling electrical appliances such as televisions, air conditioners and the like. The design adopts the photosensitive element to scan the optical contact, so that the touch position detection module has the remarkable advantages of simple structure, low cost, simplicity in installation and debugging and the like.
The photosensitive element may employ an infrared receiving head. To simplify the system and reduce the signal processing load of the touch position detection module.
The width of the interior of the filtering channel is as follows: the width of one end of the light inlet is larger than that of one end of the photosensitive element, and the width of the end of the light inlet is gradually reduced from the end of the light inlet to the end of the photosensitive element.
The at least four light filtering channels are sequentially arranged into at least two rows, one end where the photosensitive elements are located is adjacent to the other end where the light inlet is located is adjacent to the other end. The above design makes the optical signal receiving areas face in the same direction.
The light-filtering channels are sequentially arranged in a row, one end where the photosensitive elements are located is adjacent, and the other end where the light-entering ports are located is adjacent. The above design makes the optical signal receiving areas face in the same direction.
And the light inlet is provided with an optical filter so as to filter out non-relevant optical signals. The optical signal receiving head is characterized in that the light inlets of the optical signal receiving head are the same optical filter.
The channel wall of the filtering channel is provided with a light reflecting layer to enhance light. So as to ensure that the photosensitive element corresponding to the filtering channel can receive the optical signal emitted from the optical signal area corresponding to the filtering channel.
The channel walls of the filtering channels are provided with a dark coating to absorb light. So as to prevent the photosensitive element corresponding to the filtering channel from receiving the optical signal emitted from the optical signal region corresponding to the other filtering channel.
When the plurality of photosensitive elements in the same row of filtering channels receive the light reflected by the optical contact, the optical contact is considered to be positioned in the middle between the optical signal areas where the two photosensitive elements at the two ends of the plurality of photosensitive elements are positioned, the signal processing module generates a touch signal and transmits the touch signal to the microprocessor system, and the microprocessor system correlates the determined positions of the optical contacts to the touch panel. The plurality of photosensitive elements refers to more than two photosensitive elements.
Specifically, the following steps can be performed: when even number of photosensitive elements in the filtering channels in the same row receive the light reflected by the optical contacts, the optical contacts are regarded as being positioned in the middle of the optical signal area where the middle two photosensitive elements are positioned, the signal processing module generates touch signals and transmits the touch signals to the microprocessor system, and the microprocessor system associates the middle of the optical signal receiving area where the middle two photosensitive elements are positioned with the touch panel.
When the light reflected by the optical contacts is received by the odd number of photosensitive elements in the same row of filtering channels, the optical contacts are regarded as the optical signal areas where the intermediate photosensitive elements are located, the signal processing module generates touch signals and transmits the touch signals to the microprocessor system, and the microprocessor system associates the optical signal areas where the intermediate photosensitive elements are located with the touch panel.
The touch member generates a light beam that forms a light contact on the touch panel.
The touch piece can adopt a remote touch pen, the remote touch pen adopts a laser, and an optical contact is formed on the touch pad through the laser. The remote touch pen comprises a laser and a power supply, and is further provided with a signal generation module, the power supply is connected with the signal generation module, the signal generation module is connected with the laser, the signal generation module generates an oscillating electric signal, and drives the laser to emit a flashing laser signal corresponding to the electric signal. The remote touch pen realizes corresponding remote operation on the touch screen system adopting the linear laser light source through the remote control optical contact. The remote touch pen is provided with a switch.
The touch piece can adopt a short-range touch pen, the short-range touch pen comprises a light-emitting element, and the light-emitting element of the touch piece is triggered to emit light when the touch piece touches the touch plate, so that an optical contact is formed on the touch plate. The short-range touch pad comprises a pen shell, a power supply, a switch and a light-emitting element, wherein the switch controls the light-emitting condition of the light-emitting element; the switch is connected with the touch end of the short-range touch pen, the touch end triggers the switch when touching the touch pad, the light-emitting element emits light, and an optical contact is formed on the touch pad. The short-range touch pen emits light when contacting with the touch pad, an optical contact is formed on the touch pad, and the optical contact moves along with the movement of the short-range touch pen, so that the touch operation of the short-range touch pen on a touch screen system adopting a linear laser light source is realized through the optical contact.
The solar cell touch panel is characterized by further comprising a power supply, wherein the power supply comprises a storage battery, the storage battery is connected with a photocell, the light receiving surface of the photocell faces the touch panel, and the photocell receives light energy on the touch panel to realize charging.
The microprocessor system is connected with a remote controller module and sends signals to a remote controller receiving end of the controlled equipment through the remote controller module.
The remote controller module adopts an infrared remote controller module, and a light-diffusing plate is arranged in front of an infrared emission head of the infrared remote controller module, so that light signals are emitted to the periphery to reduce blind areas.
The light inlets of the at least four filtering channels are strip-shaped, and the length directions of the light signal receiving areas formed on the touch pad by the at least two strip-shaped light inlets are staggered.
When the optical signals sent by the optical contacts are received and identified by the photosensitive elements in at least two filtering channels with staggered optical signal receiving areas in the length direction, the micro-processor system receives one photosensitive element data processed by the signal processing module to obtain that the optical contacts are positioned in one optical signal area, the micro-processor system receives the other photosensitive element data processed by the signal processing module to obtain that the optical contacts are positioned in the other optical signal area, the micro-processor system regards that the optical contacts are positioned at the crossing position of one optical signal area and the other optical signal area, and the micro-processor system relates the optical signal area positioned at the crossing position of one optical signal area and the other optical signal area to the touch panel or a picture displayed at the touch panel. By increasing the number of the staggered parts, the touch precision can be effectively improved on the premise of not increasing the number of the photosensitive elements.
Wherein at least two strip-shaped light inlets have an overlapping area in the width direction of the light signal receiving area formed on the touch panel.
When the optical signal emitted by the optical contact is simultaneously received and identified by the photosensitive elements in at least two of the filtering channels corresponding to at least two optical signal receiving areas with partial overlapping areas in the width direction, the microprocessor system regards the optical contact as being positioned in the overlapping area of the at least two optical signal receiving areas in the width direction on the touch panel.
By setting the overlapping area in the width direction and identifying the optical contact in the overlapping area, the touch precision can be effectively improved.
Two optical signal receiving regions having overlapping regions in the width direction are staggered with two other optical signal receiving regions having overlapping regions in the width direction in the length direction; when the optical signals of the optical contact are received and identified by the photosensitive elements corresponding to the two optical signal receiving areas at the same time, the microprocessor system regards the optical contact as being positioned at the intersection of the two overlapping areas.
By adding the algorithm, the touch precision can be further effectively improved.
The touch panel comprises at least two optical signal receiving heads, wherein the at least two optical signal receiving heads are arranged in front of the touch panel; the light inlets of at least two filtering channels of an optical signal receiving head are strip-shaped, and the light inlets are arranged in parallel in the length direction; the light inlets of at least two filtering channels of the other optical signal receiving head are strip-shaped, and the light inlets are arranged in parallel in the length direction;
at least two optical signal receiving areas formed on the touch panel by one optical signal receiving head are staggered with at least two optical signal receiving areas formed on the touch panel by the other optical signal receiving head in the length direction.
The structure of a single optical signal receiving head is simplified by arranging two optical signal receiving heads. And can provide a hardware basis for further improving system performance.
When the touch pad is large, the linear lasers can be arranged in a plurality of numbers, the linear lasers can be arranged on the side edge of the touch pad, and the linear lasers can also be arranged as required, so long as a laser emitting surface formed by the linear lasers covers the touch range of the touch pad. And the signal processing module receives the receiving information sent by the two optical signal receiving heads in a time-sharing scanning mode in a time-sharing mode. The design can reduce the number of the linear lasers, thereby reducing the cost.
The shell is a shell with a cartoon animal shape; the shell is provided with two light-transmitting openings which are arranged left and right;
the two light transmitting openings are respectively provided with one optical signal receiving head; the light-transmitting openings can be eyes with cartoon animal shapes and are placed in a room to increase interestingness. The length directions of the light inlets of the filtering channels arranged in the two optical signal receiving heads are different, so that the optical signal areas formed by mapping on the touch pad are arranged in a matrix shape.
And a calibration laser system is arranged in the middle of the two light-transmitting openings, and a laser emitting opening of the calibration laser system faces a touch area on the touch pad. The laser is a cross laser or a point laser.
The laser is provided with a laser switch which is a normally open switch. The calibration laser system is used for calibrating so that the centers of the two optical signal receiving heads are aligned with the center position of the touch screen system.
The shell of the cartoon animal shape can be provided with two vertically symmetrical light-transmitting openings, and the two vertically symmetrical light-transmitting openings are respectively provided with an optical signal receiving head.
The microprocessor system adopts a microprocessor system of a television set top box. The touch screen system adopting the linear laser light source is in signal connection with the television set top box and shares a microprocessor system with the television set top box to realize the touch operation on the television.
The microprocessor system is a microprocessor system of a computer. The touch screen system adopting the linear laser light source is in signal connection with the computer and shares a microprocessor system with the computer to realize the touch operation of the computer.
The microprocessor system is connected with a wireless local area network communication module and is in signal connection with external equipment needing touch operation in a wireless mode, and the touch operation function is achieved.
The micro-processor system is connected with a Bluetooth communication module and is in signal connection with external Bluetooth equipment needing touch operation in a Bluetooth transmission mode, and the touch operation function is achieved.
The microprocessor system is connected with an infrared communication module and is in signal connection with external infrared equipment needing touch operation in an infrared transmission or infrared remote control mode, and the touch operation function is achieved.
Has the advantages that: due to the adoption of the technical scheme, the touch screen is simple in structure and low in cost, and can realize the function of high-precision touch by using fewer devices.
Drawings
FIG. 1 is a circuit block diagram of the present invention;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is a schematic diagram of an optical signal receiving head according to the present invention;
FIG. 4 is a schematic diagram of another structure of an optical signal receiving head according to the present invention;
FIG. 5 is a schematic diagram of the optical signal receiving head of FIG. 4 associated with an optical signal receiving area on a touch pad;
fig. 6 is a schematic view of a structure of an optical signal receiving head in which light inlets of at least four filter channels are respectively in a strip shape;
FIG. 7 is a schematic diagram of the optical signal receiving head of FIG. 6 associated with an optical signal receiving area on a touch pad;
fig. 8 is a schematic structural diagram of a receiver using two optical signal receiving heads.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific drawings.
Referring to fig. 1 and 2, the touch screen system using a linear laser light source includes a touch panel 2 and a microprocessor system 11. The microprocessor system 11 is connected to a touch position detection module 12 for detecting the position of a touch point, and the touch position detection module 12 includes an optical signal receiving head 13 and a signal processing module 14. The optical signal receiving head 13 is provided with a photosensitive element 15, and the photosensitive element 15 is connected with the signal processing module 14. The optical signal receiving head 13 is placed in front of the touch panel 2. In the case where the touch panel 2 transmits light, the optical signal receiving head 13 may also be placed behind the touch panel 2. The manner in which the optical signal receiving head 13 is placed behind the touch panel 2 is particularly suitable for a display that displays in a rear projection manner.
The touch screen system adopting the linear laser light source also comprises a power supply. The power supply comprises a battery connected to a photocell having a light-receiving surface facing the touch panel 2. The photocell receives the light sent from the touch pad 2, converts the light into electric energy, and provides electric energy for the system operation or charges the storage battery. Part of the electric energy or all the electric energy is supplied to the whole system through the photocell.
The communication between the touch screen system and the controlled device using the linear laser light source may be one or more of the following:
(1) the microprocessor system 11 is connected to a wireless local area network communication module, and is in signal connection with external equipment needing touch operation in a wireless mode, so that the touch operation function is realized.
(2) The microprocessor system 11 is connected with a bluetooth communication module, and is in signal connection with external bluetooth equipment needing touch operation in a bluetooth transmission mode, so that the touch operation function is realized.
(3) The microprocessor system 11 is connected with an infrared communication module, and is in signal connection with external infrared equipment needing touch operation in an infrared transmission or infrared remote control mode, so that a touch operation function or a remote control function is realized.
(4) The microprocessor system 11 is connected with a remote controller module, and the microprocessor system 11 sends signals to a remote controller receiving end of the controlled equipment through the remote controller module. The remote controller module adopts an infrared remote controller module, and a light-diffusing plate is arranged in front of an infrared emission head of the infrared remote controller module, so that light signals are emitted to the periphery to reduce blind areas. It is especially suitable for remote control of TV set and air conditioner.
The microprocessor system 11 may take the form of:
(1) directly adopting a microprocessor system 11 in the controlled equipment, such as a microprocessor system of a television set-top box; a microprocessor system employing a computer. The structure is simplified and the cost is reduced by sharing the CPU.
(2) An independent micro-processor system 11 is adopted, and the micro-processor system 11 preferably adopts a small micro-processor system such as a single chip microcomputer system, an ARM system and the like.
Referring to fig. 3, the optical signal receiving head 13 includes at least four filter channels 131. One end of the filtering channel 131 is provided with a light inlet 132, the other end of the filtering channel 131 is provided with the photosensitive element 15, and the channel wall of the filtering channel 131 is a channel wall with a light shielding function. The light inlets 132 of the at least four filter channels 131 of the optical signal receiving head 13 face the touch panel 2. The photosensitive element 15 may be a photodiode, a phototransistor, or an infrared receiver. The specific design can be preferably an infrared receiving head, and the infrared receiving head is formed by integrating an infrared receiving circuit in one component. The general internal circuits include infrared monitor diodes, amplifiers, limiters, band-pass filters, integrators, comparators, etc. The infrared receiving head can be regarded as a part of or even all of the circuits of the photodiode and the signal processing module 14 are integrated together. Therefore, the use of the infrared receiving head can simplify the system, reduce the signal processing amount of the touch position detection module 12 or omit the signal processing module 14.
The photosensitive element 15 receives the light from the light inlet 132 toward the region, so that an effective light signal receiving region 21 is formed in front of the light inlet 132. The photosensitive element 15 in the filter channel 131 receives the optical signal in the optical signal receiving area 21 through the light inlet 132. The optical signal outside the optical signal receiving area 21 on the touch panel 2 is rarely received by the photosensor 15 or is not received at all by the photosensor 15 because of the light shielding effect of the channel wall of the filter channel 131 having the light shielding effect, so that the photosensor 15 does not respond to the optical signal outside the optical signal receiving area 21.
When the optical contact 3 capable of being recognized by the touch position detection module 12 is formed on the touch panel 2, an optical signal emitted from the optical contact 3 is received by at least one photosensitive element 15 in the touch position detection module 12, processed by the signal processing module 14 to generate a touch signal, and the touch signal is transmitted to the microprocessor system 11. The microprocessor system 11 regards the optical contact 3 as being located in the optical signal receiving area 21 corresponding to the light inlet 132 of the filter channel 131 where the photosensitive element 15 receiving the optical signal is located, and associates the optical signal receiving area with the touch panel 2 or a picture displayed on the touch panel 2. The design is particularly suitable for controlling electrical appliances such as televisions, air conditioners and the like. The design adopts the photosensitive element 15 to scan the optical contact 3, so that the touch position detection module 12 has the remarkable advantages of simple structure, low cost, simple installation and debugging and the like. When the screen is large, a plurality of optical signal receiving heads 13 may be employed.
The specific design for the filter channel 131 is as follows:
in a specific design, the walls of the filtering channels 131 may be provided with a light reflecting layer to enhance the light. So as to ensure that the photosensitive element 15 corresponding to the filter channel 131 can receive the optical signal emitted from the optical signal region corresponding to the filter channel 131. This design is suitable for the case of weak light of the optical contact 3.
The walls of the channels of the filter channel 131 may also be provided with a dark coating or a dark frosted coating to absorb light so as to prevent the light sensitive element 15 corresponding to the filter channel 131 from receiving light signals emitted from the light signal regions corresponding to other filter channels. This design is suitable for the case of a strong light of the optical contact 3.
Referring to fig. 3, the width inside the filtering channel 131 is: the width of the end where the light inlet 132 is located is greater than the width of the end where the photosensitive element 15 is located, and the width gradually decreases from the end where the light inlet 132 is located to the end where the photosensitive element 15 is located. Preferably, the light inlet 132 is arcuate. On the premise that the light inlet 132 is arc-shaped, the cross section of the filter channel 131 is more preferably fan-shaped.
The way of producing the optical contacts 3 may be two of the following:
firstly, the touch piece which emits light is adopted for generation.
The light beam is generated by the touching member and forms an optical contact on the touch panel 2.
The touch member may be a remote touch pen using a laser, and the optical contact point is formed on the touch panel 2 by the laser. The remote touch pen comprises a laser and a power supply, and is further provided with a signal generating module, the power supply is connected with the signal generating module, the signal generating module is connected with the laser, and the signal generating module generates an oscillating electric signal and drives the laser to emit a flashing laser signal corresponding to the electric signal. The remote touch pen realizes corresponding remote operation on the touch screen system adopting the linear laser light source through the remote control optical contact. The remote touch pen is provided with a switch.
The touch member may be a proximity touch pen including a light emitting element, and the touch member triggers the light emitting element of the touch member to emit light when touching the touch panel 2, thereby forming an optical contact point on the touch panel 2. The proximity touch panel 2 includes a pen case, a power source, a switch, and a light emitting element, and the switch controls the light emission of the light emitting element. The switch is connected with a touch end of the proximity touch pen, the touch end triggers the switch when touching the touch pad 2, the light emitting element emits light, and an optical contact is formed on the touch pad 2. The short-range touch pen emits light when contacting the touch pad 2, an optical contact is formed on the touch pad 2, and the optical contact moves along with the movement of the short-range touch pen, so that the touch operation of the short-range touch pen on a touch screen system adopting a linear laser light source is realized through the optical contact.
Secondly, a laser is arranged in front of the touch pad
Referring to fig. 5, the touch screen system employing a line laser light source further includes a line laser 4. A line laser 4 is disposed at the corner of the touch panel 2. A line laser 4 forms a laser exit face parallel to the touch panel 2 within the touch range of the touch panel 2. When the touch member touches the touch panel 2, the laser exit surface is blocked, and the optical contact 3 is formed. When the touch panel 2 is large, a plurality of line lasers 4 may be provided, and a plurality of line lasers 4 may be provided on the side of the touch panel 2, or may be provided as needed. As long as a layer of laser exit surfaces formed by a plurality of line-shaped lasers 4 covers the touch range of the touch panel 2.
Specific example 1:
referring to fig. 4, at least four filter channels 131 are sequentially arranged in at least two rows, one end of each of the photosensitive elements 15 is adjacent to the other end of the corresponding one of the light inlets 132, and the light signal receiving areas are oriented in the same direction.
Preferably, at least four filter channels 131 are arranged in a row in sequence, one end of the photosensitive element 15 is adjacent to one end of the light inlet 132 is adjacent to one end of the light inlet. The light inlet 132 is provided with a filter to filter out the uncorrelated light signals. The same optical filter is used for at least four light inlets 132 of the optical signal receiving head 13, so as to simplify the structure.
Referring to fig. 5, the optical signal receiving areas 21 corresponding to two adjacent light inlets 132 have overlapping portions, which are shown by the hatched portions in the figure.
When the optical contact 3 is located in the overlapping portion (hatched portion), at least two photosensitive elements 15 receive light reflected or scattered at the optical contact 3. Such as three, four, five or even more light sensitive elements 15.
When even number of photosensitive elements 15 in the filtering channels 131 in the same row receive the light reflected or scattered by the optical contacts 3, the optical contacts 3 are considered to be located in the middle of the optical signal area where the middle two photosensitive elements 15 are located, the signal processing module 14 generates a touch signal and transmits the touch signal to the microprocessor system 11, and the microprocessor system 11 associates the middle of the optical signal area where the middle two photosensitive elements 15 are located with the touch panel 2 or with a picture displayed on the touch panel 2.
When an odd number of photosensitive elements 15 in the same row of filter channels 131 receive the light reflected at the optical contact 3, the optical contact 3 is considered to be located in the optical signal area corresponding to the middle photosensitive element 15. The signal processing module 14 generates a touch signal and transfers the touch signal to the microprocessor system 11. The microprocessor system 11 associates the light signal area corresponding to the photosensor 15 located in the middle to the touch panel 2 or to a screen displayed on the touch panel 2.
Specific example 2:
referring to fig. 6, the light inlets of the at least four filter channels 131 are respectively in a strip shape, and include a longitudinal light inlet 1321 and a transverse light inlet 1322.
Referring to fig. 7, longitudinal light inlets 1321 and transverse light inlets 1322 are staggered in the longitudinal direction of optical signal receiving area 21 formed on touch panel 2, and the staggered positions are hatched.
When the optical signal emitted by the optical contact 3 is received and identified by the photosensitive elements 15 in at least two filtering channels 131 corresponding to the optical signal receiving regions 211 with staggered length directions, the micro processor system 11 receives data of one photosensitive element processed by the signal processing module 14 to obtain that the optical contact 3 is located in an optical signal region corresponding to one photosensitive element, and the micro processor system 11 receives data of another photosensitive element processed by the signal processing module 14 to obtain that the optical contact is located in an optical signal region corresponding to another photosensitive element. The micro-processor system 11 is regarded as the optical contact 3 is located at the intersection 211 of one optical signal area and another optical signal area. The microprocessor system 11 associates an optical signal area located at a position where one optical signal area intersects another optical signal area on the touch panel 2 or on a screen displayed at the touch panel 2. By increasing the number of the staggered parts, the touch precision can be effectively improved on the premise of not increasing the number of the photosensitive elements.
Referring further to fig. 7, at least two stripe-shaped light inlets 1321 or light inlets 1322 have an overlapping area in the width direction of the optical signal receiving area 21 formed on the touch panel 2, such as the overlapping area 212 of the plurality of light inlets 1322.
When the optical signal emitted from the optical contact 3 is simultaneously received and identified by the photosensitive elements 15 in at least two filter channels 131 corresponding to at least two optical signal receiving areas having the partially overlapped area 212 in the width direction. The microprocessor system 11 regards the optical contact 3 as being located in the overlapping area 212 in the width direction of at least two optical signal receiving areas on the touch panel 2. By providing the overlapping area 212 in the width direction and recognizing the optical contact 3 in the overlapping area 212, the touch accuracy can be effectively improved.
Two optical signal receiving regions having the overlapping region 212 in the width direction are staggered in the longitudinal direction from the other two optical signal receiving regions having the overlapping region 213 in the width direction. When the optical signal of the optical contact 3 is received and identified by the photosensitive elements 15 corresponding to the two optical signal receiving areas at the same time, the microprocessor system 11 regards the optical contact 3 as being located at the intersection of the overlapping area 212 and the overlapping area 213. By adding the algorithm, the touch precision can be further effectively improved.
Referring to fig. 8, a hardware basis may be provided for further simplifying the structure of a single optical signal receiving head and further improving the system performance. The original optical signal receiving head 13 is divided into two, that is, an optical signal receiving head 13a and an optical signal receiving head 13 b.
The light inlets of at least two filter channels of the optical signal receiving head 13a are strip-shaped, and are arranged in parallel in the length direction. The light inlets of at least two filter channels of the optical signal receiving head 13b are strip-shaped, and are arranged in parallel in the length direction.
Referring to fig. 7, at least two optical signal receiving areas formed on the touch panel 2 by the optical signal receiving head 13a are staggered in the longitudinal direction from at least two optical signal receiving areas formed on the touch panel 2 by the optical signal receiving head 13 b. Similar to the two sets of filter channels 131 in fig. 6 with the light inlets 1321 and 1322, the filter channels are separately disposed on two relatively independent optical signal receiving heads.
Further, the touch screen system using the linear laser light source further includes a housing, and the microprocessor system 11, the touch position detection module 12, the storage battery, and the like are disposed in the housing. The shell adopts a shell with a cartoon animal shape. Two light-transmitting openings which are arranged left and right are arranged on the shell. The two light transmitting ports are respectively provided with an optical signal receiving head 13a and an optical signal receiving head 13 b. The light-transmitting opening can be an eye part with a cartoon animal shape and is placed in a room to increase interestingness. The optical signal receiving heads 13a and 13b are arranged such that the longitudinal directions of the light inlets of the filter channels are not the same. The length directions may intersect or may be further arranged to be perpendicular to each other. So that the optical signal areas mapped and formed on the touch panel 2 are arranged in a matrix. The shell of the cartoon animal model can also be provided with two vertically symmetrical light-transmitting openings, and the two vertically symmetrical light-transmitting openings are respectively provided with an optical signal receiving head.
A calibration laser system is arranged in the middle of the two light-transmitting openings, namely between the optical signal receiving head 13a and the optical signal receiving head 13b, and the emitting opening of the laser 5 of the calibration laser system faces the touch area on the touch panel 2. The laser 5 is a cross laser or a spot laser. The laser 5 is provided with a laser switch which is a normally open switch. The calibration laser system is used to calibrate such that the centers of the two optical signal receiving heads are as close as possible to the center of the touch screen system 2.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (15)
1. The touch screen system adopting the linear laser light source comprises a touch pad and a microprocessor system, wherein the microprocessor system is connected with a touch position detection module for detecting the position of a touch point;
the optical signal receiving head comprises at least four filtering channels; one end of the filtering channel is provided with a light inlet, the other end of the filtering channel is provided with the photosensitive element, and the channel wall of the filtering channel has a shading effect;
the optical signal receiving head is arranged in front of the touch pad, the light inlets of at least four filtering channels of the optical signal receiving head face the touch pad, corresponding optical signal receiving areas are formed on the touch pad,
the optical signal receiving head is arranged in front of the touch pad, namely the optical signal receiving head is arranged in front of the front surface of the touch pad, or the optical signal receiving head is arranged in front of the back surface of the touch pad;
the touch screen system adopting the linear laser light source further comprises a linear laser, the linear laser is arranged on one side of the touch pad, and the linear laser forms a laser emergent surface parallel to the touch pad in the touch range of the touch pad; when the touch piece touches the touch pad, the laser emergent surface is shielded to form an optical contact;
when an optical contact which can be identified by the touch position detection module is formed on the touch pad, an optical signal sent out by the optical contact is received by at least one photosensitive element in the touch position detection module, is processed by the signal processing module to generate a touch signal, and transmits the touch signal to the microprocessor system; the micro-processor system regards that the optical contact is positioned in an optical signal receiving area corresponding to an optical inlet of a filtering channel where the photosensitive element receiving the optical signal is positioned, and associates the optical signal receiving area with the touch panel or a picture displayed on the touch panel;
the photosensitive element receives light rays in the area towards the light inlet, so that an effective light signal receiving area is formed in front of the light inlet;
the width of the interior of the filtering channel is as follows: the width of one end of the light inlet is larger than that of one end of the photosensitive element, and the width of the light inlet is gradually reduced from one end of the light inlet to one end of the photosensitive element;
the channel wall is provided with a light reflecting layer, or the channel wall is provided with a dark coating.
2. The touch screen system using a linear laser light source as claimed in claim 1, wherein the photosensitive element is an infrared receiver, and the light inlet is provided with a filter.
3. The touch screen system of claim 1, wherein at least four of the filter channels are arranged in a row, the photosensitive elements are adjacent at one end, and the light inlets are adjacent at one end.
4. The touch screen system using a linear laser light source according to claim 1, wherein when a plurality of the photosensitive elements in the same row of the filtering channels receive the light reflected from the optical contact, the optical contact is considered to be located in the middle between the optical signal areas where two of the photosensitive elements at two ends of the plurality of the photosensitive elements are located, the signal processing module generates a touch signal and transmits the touch signal to the microprocessor system, and the microprocessor system associates the determined position of the optical contact with the touch panel.
5. The touch screen system using a linear laser light source as claimed in claim 4, wherein when there are even numbers of said photo sensors in the same row of filter channels receiving the light reflected at said photo contacts, the photo contacts are considered to be located in the middle of the photo signal area where the middle two of said photo sensors are located, said signal processing module generates the touch signal and transmits the touch signal to said micro-processor system, said micro-processor system associates the middle of the photo signal area where the middle two of said photo sensors are located with said touch panel;
when the light reflected by the optical contacts is received by the odd number of photosensitive elements in the same row of filtering channels, the optical contacts are regarded as the optical signal areas where the intermediate photosensitive elements are located, the signal processing module generates touch signals and transmits the touch signals to the microprocessor system, and the microprocessor system associates the optical signal areas where the intermediate photosensitive elements are located with the touch panel.
6. The touch screen system using a linear laser light source as claimed in claim 1, wherein the micro-processor system is connected to a remote controller module, and the micro-processor system sends a signal to a remote controller receiving end of the controlled device through the remote controller module;
the remote controller module adopts an infrared remote controller module, and a light-diffusing plate is arranged in front of an infrared emission head of the infrared remote controller module, so that light signals are emitted to the periphery to reduce blind areas.
7. The touch screen system of claim 1, wherein the light inlets of at least four of the filter channels are strip-shaped, and wherein at least two strip-shaped light inlets are staggered along the length of the light signal receiving area formed on the touch panel.
8. The touch screen system using a line laser light source as claimed in claim 7, when the optical signals emitted by the optical contacts are simultaneously received and identified by the photosensitive elements in at least two filter channels with staggered optical signal receiving areas in the length direction, the microprocessor system receives the data of a photosensitive element processed by the signal processing module to obtain that the optical contact is positioned in an optical signal area, the microprocessor system receives the data of another photosensitive element processed by the signal processing module to obtain that the optical contact is positioned in another optical signal area, the microprocessor system is regarded as the optical contact is positioned at the intersection position of one optical signal area and another optical signal area, the microprocessor system associates an optical signal area located at a position where an optical signal area crosses another optical signal area on the touch panel or on a screen displayed at the touch panel.
9. The touch screen system using a linear laser light source as claimed in claim 7, wherein when the optical signal emitted from the optical contact is simultaneously received and identified by the photosensitive elements in at least two of the filter channels corresponding to at least two of the optical signal receiving areas having a partially overlapping area in the width direction, the microprocessor system regards the optical contact as being located in the overlapping area in the width direction of at least two of the optical signal receiving areas on the touch panel.
10. The touch screen system using a line laser light source as claimed in claim 9, wherein two of the light signal receiving areas having an overlapping area in the width direction are staggered with respect to the other two of the light signal receiving areas having an overlapping area in the width direction; when the optical signals of the optical contact are received and identified by the photosensitive elements corresponding to the two optical signal receiving areas at the same time, the microprocessor system regards the optical contact as being positioned at the intersection of the two overlapping areas.
11. The touch screen system using a line laser light source as claimed in claim 10, further comprising at least two of said optical signal receiving heads, said at least two optical signal receiving heads being disposed in front of said touch pad; the light inlets of at least two filtering channels of an optical signal receiving head are strip-shaped, and the light inlets are arranged in parallel in the length direction; the light inlets of at least two filtering channels of the other optical signal receiving head are strip-shaped, and the light inlets are arranged in parallel in the length direction;
at least two optical signal receiving areas formed on the touch panel by one optical signal receiving head are staggered with at least two optical signal receiving areas formed on the touch panel by the other optical signal receiving head in the length direction.
12. The touch screen system using a line laser light source as claimed in claim 11, wherein the signal processing module uses a time-sharing scanning manner to receive the receiving information sent by the two optical signal receiving heads in a time-sharing manner.
13. The touch screen system using a linear laser light source as claimed in claim 1, further comprising a housing, wherein the housing is a housing with cartoon animal shape; the shell is provided with two light-transmitting openings which are arranged left and right;
the two light transmitting openings are respectively provided with one optical signal receiving head; the light-transmitting opening is an eye with a cartoon animal shape.
14. The touch screen system using a linear laser light source of claim 13, wherein the length directions of the light inlets of the filter channels arranged in the two optical signal receiving heads are different, so that the optical signal areas mapped on the touch pad are arranged in a matrix.
15. The touch screen system using a line laser light source of claim 13, wherein a calibration laser system is provided in the middle of the two light-transmissive openings, the laser emitting openings of the calibration laser system facing the touch area on the touch panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710188049.8A CN107145263B (en) | 2011-06-07 | 2011-06-07 | Touch screen system using linear laser light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150364.4A CN102819355B (en) | 2011-06-07 | 2011-06-07 | Touch pad front sets the touch-screen system that optical signal receives head |
| CN201710188049.8A CN107145263B (en) | 2011-06-07 | 2011-06-07 | Touch screen system using linear laser light source |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110150364.4A Division CN102819355B (en) | 2011-06-07 | 2011-06-07 | Touch pad front sets the touch-screen system that optical signal receives head |
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| CN107145263A CN107145263A (en) | 2017-09-08 |
| CN107145263B true CN107145263B (en) | 2020-02-07 |
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| CN201710188049.8A Active CN107145263B (en) | 2011-06-07 | 2011-06-07 | Touch screen system using linear laser light source |
| CN201710190073.5A Active CN107132953B (en) | 2011-06-07 | 2011-06-07 | Touch screen with optical signal receiving head arranged in front of touch pad |
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| CN110941369B (en) * | 2019-12-11 | 2024-01-16 | 业成科技（成都）有限公司 | Photosensitive module and sensing device |
| CN113030020A (en) * | 2019-12-24 | 2021-06-25 | 北汽福田汽车股份有限公司 | Gas detection device in oil supply pipeline and vehicle with same |
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| CN101566899A (en) * | 2009-05-27 | 2009-10-28 | 清华大学 | Multi-point triggering method and system based on linear array laser |
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| CN1459705A (en) * | 2002-05-23 | 2003-12-03 | 高启烈 | Contact surface plate device having optical position detection |
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| CN101320307B (en) * | 2007-06-04 | 2011-08-10 | 北京汇冠新技术股份有限公司 | Method for recognizing multiple touch points on infrared touch screen |
| FR2933511A1 (en) * | 2008-07-04 | 2010-01-08 | Optinnova | INTERACTIVE VISUALIZATION DEVICE AND METHOD USING DETECTION CAMERA AND OPTICAL POINTER |
| CN101344827A (en) * | 2008-08-22 | 2009-01-14 | 李兴文 | Optical touch screen and touch pen |
| CN201413509Y (en) * | 2009-06-05 | 2010-02-24 | 北京汇冠新技术股份有限公司 | Infrared touch screen |
| TWI413923B (en) * | 2009-06-30 | 2013-11-01 | E Pin Optical Industry Co Ltd | Mems scanning coordinate detection method and touch panel thereof |
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| CN201804315U (en) * | 2010-09-30 | 2011-04-20 | 上海理工大学 | Infrared touch screen with converging lenses |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107132953A (en) | 2017-09-05 |
| CN102819355B (en) | 2017-05-31 |
| CN107145263A (en) | 2017-09-08 |
| CN102819355A (en) | 2012-12-12 |
| CN107132953B (en) | 2021-03-26 |
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Effective date of registration: 20201208 Address after: 274300 Dongcheng East Outer Ring Nanfan fire brigade West, Shan county, Heze City, Shandong Province Patentee after: Sui Meiqing Address before: 201111 Shanghai city Minhang District Yuanjiang Road No. 5500 building second room 577 Patentee before: SHANGHAI KEDOU ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. |