CN107145264B - Optical signal receiving head and application thereof - Google Patents
Optical signal receiving head and application thereof Download PDFInfo
- Publication number
- CN107145264B CN107145264B CN201710191452.6A CN201710191452A CN107145264B CN 107145264 B CN107145264 B CN 107145264B CN 201710191452 A CN201710191452 A CN 201710191452A CN 107145264 B CN107145264 B CN 107145264B
- Authority
- CN
- China
- Prior art keywords
- light
- touch
- optical signal
- signal receiving
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 196
- 238000001914 filtration Methods 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 241000180587 Pinnidae Species 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
An optical signal receiving head and application thereof relate to a touch screen. The optical touch screen comprises a touch pad, a touch position detection module and a microprocessor system, wherein the touch position detection module comprises a signal processing module and an optical signal receiving head, and a photosensitive element is arranged on the optical signal receiving head and connected with the signal processing module; the optical signal receiving head comprises at least four filtering channels; one end of the light filtering channel is provided with a light inlet, and the other end of the light filtering channel is provided with a photosensitive element; the photosensitive element receives the 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 light inlets of the four filtering channels face the position of the touch pad, and at least four optical signal receiving areas are formed in front of 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: 2011101503748, the name is: optical touch screen systems.
Technical Field
The present invention relates to electronic devices, and particularly to a touch screen.
Background
With the increasing development of multimedia technology, touch screens are applied more and more widely, such as information query, industrial control, multimedia teaching and the like of telecommunication offices, banks and city streets. The touch screen has the advantages of firmness, durability, high response speed, space saving, easy communication and the like. 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 direct and more convenient for the user.
The existing touch screen mainly adopts an infrared touch screen. Compared with other touch screens, the infrared touch screen has a series of advantages of stable performance, strong anti-interference capability, long service life, high precision and the like. Almost overwhelming, the market for other touch screens is gradually being taken. The infrared touch screen still has the fatal weak point and is difficult to overcome. In addition, an infrared correlation tube is required to be arranged outside the screen, so that the compactness of the structure is influenced, and the small screen is inconvenient to adopt, such as the screen of a mobile phone and a palm computer. And the cost of the infrared touch screen is still high.
Disclosure of Invention
The present invention is directed to an optical touch screen to solve the above technical problems.
It is also an object of the present invention to provide an optical signal receiving head.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
an optical signal receiving head, comprising at least four filter 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 is a channel wall made of shading materials;
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;
at least four optical signal receiving areas are formed in front of positions where light inlets of the four filtering channels face; and the four optical signal receiving areas do not completely overlap or do not completely overlap.
The optical touch screen comprises a touch pad, a touch position detection module for detecting the position of a touch point, and a microprocessor system, wherein the touch position detection module comprises a 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 the photosensitive element, and the channel wall of the filtering channel is a channel wall made of shading materials;
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 light inlets of the four filtering channels face the position of the touch pad, and at least four optical signal receiving areas are formed in front of the touch pad; and the four optical signal receiving areas are not completely overlapped or not overlapped;
forming a light spot (taking the light spot as a touch point) which can be recognized by the touch position detection module on the touch pad, wherein after an optical signal sent out from the light spot is received by at least one photosensitive element in the touch position detection module, the optical signal generates a touch signal and transmits the touch signal to the microprocessor system; the microprocessor system regards that the light spot is positioned in a light signal receiving area corresponding to a light inlet of the filtering channel where the photosensitive element receiving the light signal is positioned, and associates the light signal receiving area with the touch pad.
The design does not need to refer to background pictures, is convenient to control and is particularly suitable for controlling electrical appliances such as televisions, air conditioners and the like. The light spot is scanned by the photosensitive element in the design, 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.
At least four filtering channels are arranged in sequence in a mode that one end where the photosensitive elements are located is adjacent to one end where the light inlet is located. The above design makes the optical signal receiving areas face in the same direction.
At least four of the filter channels are arranged in a row in sequence. The optical signal receiving head is arranged at the side of the touch pad and scans light spots.
At least four filtering channels are arranged in at least two rows in sequence. The optical signal receiving head is arranged in front of the touch pad and scans light spots.
The filtering channel is a flat fan-shaped surface, and the fan-shaped surface is parallel to the plane where the touch pad is located; at least four filtering channels are sequentially arranged on a plane parallel to the plane of the touch pad to form a row.
The filtering channels can also be in a hollow tubular shape, and at least four filtering channels are sequentially arranged on a plane parallel to the plane of the touch pad to form a row.
The light inlet of the filtering channel faces the touch panel, and the corresponding optical signal receiving area corresponds to (is mapped on) the touch panel.
The filtering channel is conical, and the filtering channel is pyramidal.
And the light inlet is provided with a light filter. In order to filter out the uncorrelated 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 light filtering channel is provided with a 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 of the light filtering channel is 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.
The microprocessor system adopts a microprocessor system of a television set top box. The optical touch screen is in signal connection with the set-top box of the television and shares a microprocessor system with the set-top box of the television, so that the touch operation of the television is realized.
The microprocessor system adopts a microprocessor system of a computer. The optical touch screen is in signal connection with a computer and shares a microprocessor system with the computer, so that touch operation on the computer is realized.
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 mode, and the touch operation function is achieved.
When even number of photosensitive elements in the filtering channels in the same row receive the light reflected by the light points, the light points are regarded as being positioned in the middle of the light 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 light signal receiving area where the middle two photosensitive elements are positioned with the touch panel.
When the light reflected by the light points is received by the odd number of photosensitive elements in the same row of filtering channels, the light points are regarded as light signal areas where the photosensitive elements in the middle are located, the signal processing module generates touch signals and transmits the touch signals to the microprocessor system, and the microprocessor system associates the light signal areas where the photosensitive elements in the middle are located with the touch panel.
In order to further improve the accuracy of the touch screen, at least two light signal receiving areas are formed in front of the touch pad by the light inlets of at least two filter channels in the same row, and when an overlapping area exists and photosensitive elements in at least two filter channels receive light signals sent out by the light points and respond, the microprocessor system regards the light points as being located in the overlapping area of the two signal receiving areas. The overlapping area may be formed by partially overlapping two optical signal receiving areas, or may be formed by partially overlapping three, four, or more optical signal receiving areas.
The optical signal receiving device comprises at least two optical signal receiving heads, and optical signal areas corresponding to the at least two optical signal receiving heads are crossed.
At least two optical signal receiving heads are respectively arranged on two sides of the touch pad.
At least two optical signal receiving heads are respectively arranged in front of the touch pad.
The signal processing module processes information of an optical signal receiving head to obtain that a light spot is positioned in an optical signal area; the signal processing module processes the information of the other optical signal receiving head to obtain that the light spot is positioned in the other optical signal area, the signal processing module generates a touch signal and transmits the touch signal to the micro-processor system, and the micro-processor system associates the optical signal area positioned at the intersection position of the optical signal area and the other optical signal area with the touch pad to further determine the position of the light spot on the touch pad.
The optical signal of a light spot is received and identified by the photosensitive elements of at least two filter channels in the same row of an optical signal receiving head; is also received and identified by the photosensitive element of at least one filtering channel of another optical signal receiving head; then, the microprocessor system determines that the light spot is located in an overlapping area of the light signal areas of at least two of the filter channels in the same row of one light signal receiving head and an overlapping area of the light signal area of at least one of the filter channels of another light signal receiving head.
By adding the algorithm, the touch precision can be further effectively improved.
The touch pad further comprises a touch piece, wherein the touch piece generates a light beam, and the light beam forms a light spot on the touch pad. The light beam generated by the touch piece can adopt laser, and the light spot is formed on the touch plate through the laser.
The touch piece can adopt a remote touch pen, the remote touch pen comprises a laser and a power supply, and further comprises 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 the signal generation module drives the laser to emit a flashing laser signal corresponding to the electric signal. The remote touch pen realizes corresponding remote operation on the optical touch screen through remote control of light spots. The remote touch pen is provided with a switch.
The touch piece 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 light spots are formed on the touch plate.
The touch piece can adopt a short-range touch pen, the short-range touch pad comprises a pen shell, a power supply, a switch and a light-emitting element, and 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 light spots are formed on the touch pad. The short-range touch pen emits light when contacting with the touch pad, a light spot is formed on the touch pad, and the light spot moves along with the movement of the short-range touch pen, so that the touch operation of the short-range touch pen on the optical touch screen is realized through the light spot.
The touch panel is characterized by further comprising a linear laser, wherein the linear laser is arranged on one side of the touch panel and forms a layer of laser emergent ray parallel to the touch panel within the touch range of the touch panel;
when the touch piece touches the touch pad, the laser emergent ray is shielded to form a light spot.
The linear laser adopts a linear laser, and the linear laser can be arranged at the opposite side of the optical signal receiving head. 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 layer of laser emergent rays formed by the linear lasers cover the touch range of the touch pad.
The line shape laser instrument be at least two, and the number with the number of light signal receiving head is the same, a line shape laser instrument sets up the offside of light signal receiving head, at least two the scintillation frequency of the light that a line shape laser instrument sent is different, the laser that a line shape laser instrument of offside was sent is received respectively to the light signal receiving head. After the frequency of the linear laser is adjusted, each touch position detection module can receive the corresponding linear laser to complete the scanning of the light spot.
The number of the optical signal receiving heads is at least two, the number of the linear lasers is one, and only one layer of laser emergent rays formed by the linear lasers covers the touch range of the touch pad. And the signal processing module receives the receiving information sent by at least two optical signal receiving heads in a time-sharing scanning mode in a time-sharing mode. The design can reduce the number of linear lasers, and further reduce the cost.
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 schematic diagram of an optical signal receiving head according to the present invention;
FIG. 2 is a schematic diagram of another optical signal receiving head according to the present invention;
FIG. 3 is a schematic structural diagram of the present invention;
FIG. 4 is a side view of another construction of the present invention;
FIG. 5 is another schematic structural view of the present invention;
FIG. 6 is another schematic structural view of the present invention;
FIG. 7 is another schematic structural view of the present invention;
fig. 8 is another schematic structure of the present invention.
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 to 8, the optical touch screen includes a touch panel 1, a touch position detection module for detecting a position of a touch point, and a micro processor system, wherein the touch position detection module includes a signal processing module, the touch position detection module further includes an optical signal receiving head 2, and the optical signal receiving head 2 is provided with a photosensitive element connected to the signal processing module. The optical signal receiving head 2 includes at least four filter channels 21. One end of the filtering channel 21 is provided with a light inlet, the other end of the filtering channel 21 is provided with a photosensitive element 22, and the channel wall of the filtering channel 21 is a channel wall made of a light shielding material. The light sensor 22 receives the light from the light inlet facing area, so that an effective light signal receiving area is formed in front of the light inlet. The light inlets of the four filter channels 21 face the position of the touch panel 1, and at least four optical signal receiving areas are formed in front of the touch panel 1. And the four optical signal receiving areas do not completely overlap or do not completely overlap.
A light spot 3 capable of being recognized by the touch position detection module is formed on the touch panel 1, and the light spot 3 is taken as a touch point. The light signal emitted at the light spot 3 is received by at least one light sensitive element 22 in the touch position detection module, generates a touch signal and transmits the touch signal to the microprocessor system. The photosensor 22 may employ an infrared receiving head. To simplify the system and reduce the signal processing load of the touch position detection module.
The individual light sensitive elements 22 in the detection module can constantly time-share the presence and location of the scanning spot 3. The microprocessor system regards that the light spot 3 is positioned in the light signal receiving area corresponding to the light inlet of the filter channel 21 where the photosensitive element 22 receiving the light signal is positioned, and associates the light signal receiving area with the touch panel 1. The design does not need to refer to background pictures, is convenient to control and is particularly suitable for controlling electrical appliances such as televisions, air conditioners and the like. The light spot 3 is scanned by the photosensitive element 22 in the design, so that the touch position detection module has the remarkable advantages of simple structure, low cost, simplicity in installation and debugging and the like.
Referring to fig. 1 and 2, the width inside the filter channel 21 is: the width of the end where the light inlet is located is larger than that of the end where the photosensitive element 22 is located, and the width gradually decreases from the end where the light inlet is located to the end where the photosensitive element 22 is located. At least four filter channels 21 are arranged in sequence in such a way that the ends where the photosensitive elements 22 are located are adjacent and the ends where the light inlets are located are adjacent.
Referring to fig. 1 and 3, at least four filter channels 21 are sequentially arranged in a row. The optical signal receiving head 2 is arranged at the side of the touch panel 1 to scan the light spot 3. The filtering channel 21 is a flat fan-shaped surface, and the fan-shaped surface is parallel to the plane of the touch pad 1; at least four filter channels 21 are arranged in sequence in a row in a plane parallel to the plane of the touch panel 1. The filter channels 21 may also be hollow tubes, and at least four filter channels 21 are arranged in a row in a plane parallel to the plane of the touch panel 1. Referring to fig. 3, one optical signal receiving head 2 is disposed at one side of the touch panel 1, and the optical signal receiving head 2 includes four photosensitive elements 22, and the four photosensitive elements 22 correspond to the optical signal area 1a, the optical signal area 1b, the optical signal area 1c, and the optical signal area 1d on the touch panel 1. When the light spot 3 formed by the touch piece is positioned at the optical signal area 1a, the light ray reflected by the light spot 3 is received by the photosensitive element 2a, and the signal processing module receives the received information sent by the photosensitive element 2a and determines that the touch signal is in the range of the optical signal area 1 a.
Referring to fig. 2 and 4, at least four filter channels 21 are sequentially arranged in at least two rows. The optical signal receiving head 2 is arranged in front of the touch panel 1 and scans the light spot 3. The light inlet of the filter channel 21 faces the touch panel 1, and the corresponding light signal receiving area corresponds to (is mapped onto) the touch panel 1. The filter channel 21 is conical and the filter channel 21 is pyramidal.
The light inlet is provided with a light filter. In order to filter out the uncorrelated optical signals. At least four light inlets of the optical signal receiving head 2 adopt the same optical filter. The filter channel 21 is provided with a reflective layer to enhance the light. So as to ensure that the light sensor 22 corresponding to the filter channel 21 can receive the light signal emitted from the light signal region corresponding to the filter channel 21. The channels of the filter channel 21 are kept dark coated to absorb light. In order to avoid that the light sensitive element 22 corresponding to a filter channel 21 receives the light signal emitted at the light signal area corresponding to the other filter channel 21.
The microprocessor system is a microprocessor system of a television set-top box. The optical touch screen is in signal connection with the set-top box of the television and shares a microprocessor system with the set-top box of the television, so that the touch operation of the television is realized. The microprocessor system is a microprocessor system of a computer. The optical touch screen is in signal connection with a computer and shares a microprocessor system with the computer, so that touch operation on the computer is realized. 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, so that the touch operation function is realized. 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 mode, and the touch operation function is achieved.
When even number of the photosensitive elements 22 receive the light reflected by the light spot 3, the light spot 3 is considered to be located in the middle of the light signal area where the middle two photosensitive elements 22 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 middle of the light signal area where the middle two photosensitive elements 22 are located with the touch panel 1. For example, in fig. 5, the light spot 3 is located in the middle of the optical signal area 1a and the optical signal area 1b, the photosensitive element 2a and the photosensitive element 2b both receive the light reflected by the light spot 3, the signal processing module receives the received information sent by the photosensitive element 2a and the photosensitive element 2b, respectively, and determines the middle of the optical signal area 1a and the optical signal area 1b on the touch panel 1 according to the above determination method.
When the odd number of the photosensitive elements 22 receive the light reflected by the light spot 3, the light signal area of the photosensitive element 22 with the light spot 3 in the middle is regarded as the light signal area, the signal processing module generates a touch signal and transmits the touch signal to the microprocessor system, and the microprocessor system associates the light signal area of the photosensitive element 22 in the middle with the touch panel 1. For example, in fig. 6, although the light spot 3 is located at the optical signal area 1b, the photosensitive element 2a, the photosensitive element 2b, and the photosensitive element 2c all receive the light reflected by the light spot 3, the signal processing module receives the received information sent by the photosensitive element 2a, the photosensitive element 2b, and the photosensitive element 2c, respectively, and determines that the touch signal is within the range of the optical signal area 1b where the middle photosensitive element 2b is located according to the above determination method.
In order to further improve the accuracy of the touch screen, the light inlets of the at least two filter channels 21 in the same row form at least two light signal receiving areas in front of the touch panel 1, and when an overlapping area exists, the light sensors 22 in the at least two filter channels 21 all receive the light signals emitted from the light spots 3 and respond. The microprocessor system sees the spot 3 as being in the overlapping region of the two signal receiving areas. The overlapping region may be formed by partially overlapping two optical signal receiving regions, or may be formed by partially overlapping three, four, or more optical signal receiving regions.
Referring to fig. 7, the present invention may include at least two optical signal receiving heads 2, where the optical signal areas corresponding to the at least two optical signal receiving heads 2 are intersected. At least two optical signal receiving heads 2 are respectively disposed at both sides of the touch panel 1. At least two optical signal receiving heads 2 are respectively disposed in front of the touch panel 1. The signal processing module processes information of one optical signal receiving head 2 to obtain that a light spot 3 is positioned in one optical signal area, the signal processing module processes information of another optical signal receiving head to obtain that the light spot 3 is positioned in another optical signal area, the signal processing module (or a micro-processor system) regards that the light spot 3 is positioned at the intersection position of one optical signal area and the other optical signal area, and the signal processing module generates a touch signal. And transmits the touch signal to the microprocessor system, which correlates the optical signal area located at the intersection of one optical signal area and another optical signal area to the touch panel 1, thereby determining the position of the light spot 3 on the touch panel 1.
For example, in fig. 7, two side corners of the touch panel 1 are respectively provided with one optical signal receiving head 2, and each optical signal receiving head 2 includes four photosensitive elements. The four photosensitive elements of the optical signal receiving head 2 on the left side form an optical signal area 1a, an optical signal area 1b, an optical signal area 1c, and an optical signal area 1d on the touch panel 1. The four photosensitive elements of the optical signal receiving head 2 on the right side form an optical signal area 1e, an optical signal area 1f, an optical signal area 1g, and an optical signal area 1h on the touch panel 1. The signal processing module processes the received information sent by the photosensitive element in the left optical signal receiving head 2 to obtain that the light spot 3 is located in the range of the optical signal area 1 b. Then, the signal processing module processes the received information sent by the photosensitive element in the right optical signal receiving head 2, and the light spot 3 is located in the range of the optical signal area 1 g. Finally, the signal processing module determines that the touch signal is located at the overlap of the optical signal area 1b and the optical signal area 1 g.
The optical signal of a light spot 3 is received and identified by the light sensitive elements 22 of at least two filter channels 21 of the same row of an optical signal receiving head 2. And is also received and identified by the photosensitive element of at least one filter channel of another optical signal receiving head. Then, the microprocessor system determines that the light spot 3 is located in the overlapping area of the light signal areas of at least two filter channels 21 in the same row of one optical signal receiving head 2 and the overlapping area of the light signal area of at least one filter channel of another optical signal receiving head.
When the photosensitive elements of at least two filtering channels of another optical signal receiving head receive and identify. The light spot is also located at the position, and the other light signal receiving head can also be the overlapping area of the light signal areas of the two filter channels.
The formation of the light spots 3 can take many forms, such as a touching member generating a light beam which forms one light spot 3 on the touch panel 1. The light beam generated by the touch member may be a laser by which a spot 3 is formed on the touch panel 1. The touch piece can adopt a remote touch pen, the remote touch pen comprises a laser and a power supply, and the remote touch pen further comprises 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 optical touch screen through the remote control light point 3. The remote touch pen is provided with a switch.
The touch member includes 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 1, thereby forming a light spot 3 on the touch panel 1. The touch piece can adopt a short-range touch pen, the short-range touch pen comprises a pen shell, a power supply, a switch and a light-emitting element, and 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 1, the light-emitting element emits light, and light spots 3 are formed on the touch pad 1. When the short-range touch pen is in contact with the touch pad 1, light is emitted, a light spot 3 is formed on the touch pad 1, and the light spot 3 moves along with the movement of the short-range touch pen, so that the touch operation of the short-range touch pen on the optical touch screen is realized through the light spot 3.
Referring to fig. 3, 5 and 6, the touch panel further comprises a line laser 4, the line laser 4 is arranged on one side of the touch panel 1, and the line laser 4 forms a layer of laser emergent rays parallel to the touch panel 1 in the touch range of the touch panel 1. The line laser 4 is preferably a line laser that blocks the laser beam to form a spot 3 when the touch member touches the touch panel 1. The line laser 4 may be disposed on the opposite side of the optical signal receiving head 2. When the touch panel 1 is large, a plurality of linear lasers 4 may be provided, and a plurality of linear lasers 4 may be provided on a side of the touch panel 1, or may be provided as needed, as long as a layer of laser outgoing line formed by the plurality of linear lasers 4 covers a touch range of the touch panel 1. Referring to fig. 7, there are at least two line lasers 4, the number of the line lasers 4 is the same as that of the optical signal receiving heads 2, the line lasers 4 are disposed on opposite sides of the optical signal receiving heads 2, the frequencies of the at least two line lasers 4 are different, and the optical signal receiving heads 2 respectively receive laser light emitted by the opposite line lasers 4. After the frequency of the linear laser 4 is adjusted, each touch position detection module can receive the corresponding linear laser 4 to complete the scanning of the light spot 3. Referring to fig. 8, there are at least two optical signal receiving heads 2 and one line laser 4, as long as a layer of laser emergent rays formed by the line laser 4 covers the touch range of the touch panel 1. The signal processing module receives the receiving information sent by the at least two optical signal receiving heads 2 in a time-sharing scanning mode. The design can reduce the number of the linear lasers 4, thereby reducing the cost. In fig. 8, three optical signal receiving heads 2, one line laser 4, are used.
The more the photosensitive elements in the optical signal receiving head 2 of the present invention are arranged, the higher the touch accuracy, and the more the optical signal receiving head 2 of the present invention is arranged, the higher the touch accuracy. For example, 1) one optical signal receiving head 2 is arranged, and four photosensitive elements are arranged in the optical signal receiving head 2, so that four optical signal areas are formed in front of the touch panel. An optical signal receiving head 2 is arranged, n photosensitive elements are arranged in the optical signal receiving head 2, and n optical signal areas are formed in front of the touch pad. 2) Two optical signal receiving heads 2 are arranged, and each optical signal receiving head 2 is provided with n photosensitive elements, so that n × n optical signal areas are formed in front of the touch panel. Four optical signal receiving heads 2 are arranged, n photosensitive elements are arranged in each optical signal receiving head 2, and n light sensors are formed in front of the touch panel4An optical signal area. Thus, the touchpad can recognize n4Light emitting deviceThe invention adopts a simple structure and realizes a high-precision touch function.
When the touch panel 1 of the present invention is a wide screen or a tiled screen, a plurality of optical signal receiving heads 2 may be provided, and the optical signal receiving heads 2 may be provided at the corners of the side edges of the touch panel 1, or the optical signal receiving heads 2 may be provided at the middle or other side positions of the touch panel 1, so that at least one of the photosensitive elements of each optical signal receiving head 2 can receive the optical spot 3 at the touch panel.
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 (12)
1. The optical touch screen comprises a touch pad, a touch position detection module for detecting the position of a touch point, and a microprocessor system, wherein the touch position detection module comprises a 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 light inlet is provided with an optical filter, the other end of the filtering channel is provided with the photosensitive element, and the channel wall of the filtering channel is a channel wall made of shading materials;
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 light inlets of the four filtering channels face the position of the touch pad, and at least four optical signal receiving areas are formed in front of the touch pad; and the four optical signal receiving areas are not completely overlapped or not overlapped;
forming a light spot on the touch pad, wherein the light spot can be recognized by the touch position detection module, and after a light signal sent out by the light spot is received by at least one photosensitive element in the touch position detection module, generating a touch signal and transmitting the touch signal to the microprocessor system; the microprocessor system regards that the light spot is positioned in a light signal receiving area corresponding to a light inlet of the filtering channel where the photosensitive element receiving the light signal is positioned, and associates the light signal receiving area with the touch pad;
when even number of photosensitive elements in the same row of filtering channels receive the light reflected by the light points, the light points are regarded as being positioned in the middle of the light 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 light signal receiving area where the middle two photosensitive elements are positioned with the touch panel;
when the light reflected by the light points is received by the odd number of photosensitive elements in the same row of filtering channels, the light points are regarded as light signal areas where the photosensitive elements with the light points positioned in the middle are located, the signal processing module generates touch signals and transmits the touch signals to the microprocessor system, and the microprocessor system associates the light signal areas where the photosensitive elements with the light points positioned in the middle to the touch panel;
the light inlet of at least two filtering channels in the same row forms at least two light signal receiving areas in front of the touch pad, and when an overlapping area exists, the photosensitive elements in the at least two filtering channels receive light signals sent by the light points and respond, the microprocessor system regards that the light points are positioned in the overlapping area of the two signal receiving areas.
2. The optical touch screen of claim 1, wherein the width of the interior of the filter channel is: 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.
3. The optical touch screen of claim 1, wherein at least four of the filter channels are arranged in a sequence such that the ends at which the photosensors are located are adjacent to each other and the ends at which the light inlets are located are adjacent to each other.
4. The optical touch screen of claim 3, wherein at least four of the filter channels are arranged in a row in sequence, and the optical signal receiving heads are arranged at the sides of the touch pad to scan light spots;
or at least four filtering channels are sequentially arranged into at least two rows, and the optical signal receiving head is arranged in front of the touch pad to scan light spots.
5. The optical touch screen of claim 3, wherein the filter channels are flat sectors, the sectors being parallel to the plane of the touch pad; at least four filtering channels are sequentially arranged on a plane parallel to the plane of the touch pad to form a row;
or, the filtering channels are hollow tubes, at least four filtering channels are sequentially arranged on a plane parallel to the plane of the touch pad to form a row, the light inlet of each filtering channel faces the touch pad, and the corresponding optical signal receiving area corresponds to the touch pad;
or, the filtering channel is conical, and the filtering channel is pyramidal.
6. The optical touch screen of claim 1, wherein the channels of the filtering channels are devoid of a reflective layer;
or the channel of the filtering channel is avoided from being provided with a dark coating.
7. The optical touch screen of claim 1, wherein the microprocessor system is a microprocessor system of a television set-top box;
alternatively, the microprocessor system is a microprocessor system of a computer.
8. The optical touch screen of claim 1, further comprising at least two of the optical signal receiving heads, wherein the optical signal areas corresponding to the at least two optical signal receiving heads intersect;
the at least two optical signal receiving heads are respectively arranged at two sides of the touch pad, or the at least two optical signal receiving heads are respectively arranged in front of the touch pad;
the signal processing module processes information of an optical signal receiving head to obtain that a light spot is positioned in an optical signal area; the signal processing module processes the information of the other optical signal receiving head to obtain that the light spot is positioned in the other optical signal area, the signal processing module generates a touch signal and transmits the touch signal to the micro-processor system, and the micro-processor system associates the optical signal area positioned at the intersection position of the optical signal area and the other optical signal area with the touch pad to further determine the position of the light spot on the touch pad;
the optical signal of a light spot is received and identified by the photosensitive elements of at least two filter channels in the same row of an optical signal receiving head; is also received and identified by the photosensitive element of at least one filtering channel of another optical signal receiving head; then, the microprocessor system determines that the light spot is located in an overlapping area of the light signal areas of at least two of the filter channels in the same row of one light signal receiving head and an overlapping area of the light signal area of at least one of the filter channels of another light signal receiving head.
9. The optical touch screen of claim 1, further comprising a touch member, the touch member generating a light beam, the light beam forming a light spot on the touch panel;
the touch piece adopts a remote touch pen, the remote touch pen comprises a laser and a power supply, and is also 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, and the remote touch pen realizes corresponding remote operation on the optical touch screen through remote control of a light spot;
or the touch piece adopts a short-range touch pen, the short-range touch pad comprises a pen shell, a power supply, a switch and a light-emitting element, and 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 to form a light spot on the touch pad, the short-range touch pen emits light when contacting the touch pad to form a light spot on the touch pad, and the light spot moves along with the movement of the short-range touch pen, so that the touch operation of the short-range touch pen on the optical touch screen is realized through the light spot.
10. The optical touch screen according to claim 1, further comprising a linear laser, wherein the linear laser is arranged on one side of the touch pad, the linear laser forms a layer of laser emergent rays parallel to the touch pad in a touch range of the touch pad, and when the touch pad is touched by the touch piece, the laser emergent rays are shielded to form light spots;
the linear laser adopts a linear laser, and the linear laser is arranged at the opposite side of the optical signal receiving head.
11. The optical touch screen of claim 10, wherein the number of the line-shaped lasers is at least two and is the same as the number of the optical signal receiving heads, the line-shaped lasers are arranged at opposite sides of the optical signal receiving heads, the light emitted by at least two of the line-shaped lasers has different flashing frequencies, and the optical signal receiving heads respectively receive the laser light emitted by the line-shaped lasers at the opposite sides;
after the frequency of the linear laser is adjusted, each touch position detection module can receive the corresponding linear laser to complete the scanning of the light spot.
12. The optical touch screen of claim 10, wherein the number of the optical signal receiving heads is at least two, and the number of the linear lasers is one, as long as a layer of laser emergent rays formed by the linear lasers covers the touch range of the touch pad;
and the signal processing module receives the receiving information sent by at least two optical signal receiving heads in a time-sharing scanning mode in a time-sharing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710191452.6A CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110150374.8A CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
| CN201710191452.6A CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110150374.8A Division CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107145264A CN107145264A (en) | 2017-09-08 |
| CN107145264B true CN107145264B (en) | 2020-05-15 |
Family
ID=47303492
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110150374.8A Expired - Fee Related CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
| CN201710191452.6A Expired - Fee Related CN107145264B (en) | 2011-06-07 | 2011-06-07 | Optical signal receiving head and application thereof |
| CN201610598941.9A Expired - Fee Related CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201610598910.3A Expired - Fee Related CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110150374.8A Expired - Fee Related CN102819356B (en) | 2011-06-07 | 2011-06-07 | Optical touch screen system |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610598941.9A Expired - Fee Related CN106227391B (en) | 2011-06-07 | 2011-06-07 | Touch screen control system |
| CN201610598910.3A Expired - Fee Related CN106249967B (en) | 2011-06-07 | 2011-06-07 | Wireless touch system |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN102819356B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9367177B2 (en) * | 2013-06-27 | 2016-06-14 | Hong Kong Applied Science and Technology Research Institute Company Limited | Method and system for determining true touch points on input touch panel using sensing modules |
| CN105514766A (en) * | 2016-02-29 | 2016-04-20 | 北京仁光科技有限公司 | Large-angle uniform line laser sector modulation device |
| CN107283442B (en) * | 2017-08-07 | 2023-08-15 | 深圳欧沃机器人有限公司 | Control device and robot system |
| CN113075138A (en) * | 2020-01-03 | 2021-07-06 | 北京小米移动软件有限公司 | State identification method and device of target characteristics and electronic equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344827A (en) * | 2008-08-22 | 2009-01-14 | 李兴文 | Optical touch screen and touch pen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4455391B2 (en) * | 2005-04-15 | 2010-04-21 | キヤノン株式会社 | Coordinate input device, control method therefor, and program |
| DK2229617T3 (en) * | 2007-12-05 | 2011-08-29 | Almeva Ag | Interaction device for interaction between a display screen and a pointing object |
| CN201465072U (en) * | 2009-04-04 | 2010-05-12 | 李兴文 | Virtual touch screen |
| CN101872271B (en) * | 2009-04-27 | 2013-04-24 | 鸿富锦精密工业（深圳）有限公司 | Touch control system |
| CN102043575B (en) * | 2009-10-23 | 2012-12-19 | 鸿富锦精密工业（深圳）有限公司 | Touch electronic device with optimization configuration function and optimization configuration method of touch electronic device |
| CN102004586B (en) * | 2010-11-23 | 2013-01-09 | 广东威创视讯科技股份有限公司 | Touch point positioning device and method |
-
2011
- 2011-06-07 CN CN201110150374.8A patent/CN102819356B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201710191452.6A patent/CN107145264B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201610598941.9A patent/CN106227391B/en not_active Expired - Fee Related
- 2011-06-07 CN CN201610598910.3A patent/CN106249967B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344827A (en) * | 2008-08-22 | 2009-01-14 | 李兴文 | Optical touch screen and touch pen |
| CN101630213A (en) * | 2008-08-22 | 2010-01-20 | 李兴文 | Optical touch screen, optical touch screen light source and touch pen |
| CN101661352A (en) * | 2008-08-22 | 2010-03-03 | 李兴文 | Optical touch screen, touch pen and desk provided with optical touch screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106227391A (en) | 2016-12-14 |
| CN106249967A (en) | 2016-12-21 |
| CN102819356A (en) | 2012-12-12 |
| CN102819356B (en) | 2017-05-10 |
| CN107145264A (en) | 2017-09-08 |
| CN106249967B (en) | 2019-04-30 |
| CN106227391B (en) | 2019-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI569187B (en) | Touch sensing device, touch fingerprint image collector and touch electronic device | |
| US8659561B2 (en) | Display device including optical sensing frame and method of sensing touch | |
| US20110115748A1 (en) | Infrared Touch Screen | |
| JP5591069B2 (en) | Coordinate input device, control method therefor, and program | |
| CN107145264B (en) | Optical signal receiving head and application thereof | |
| US10209799B2 (en) | Touch display system and touch operation device | |
| JP2004295644A (en) | Optical touch panel and electronic equipment | |
| JP2016154035A (en) | Display with optical sensor and noncontact input method | |
| JP4097752B2 (en) | Optical input device | |
| WO2014190599A1 (en) | Infrared touchscreen | |
| CN101266530B (en) | Large-screen three-dimensional measuring touch screen | |
| CN104571731A (en) | Touch panel and display device | |
| CN107132953B (en) | Touch screen with optical signal receiving head arranged in front of touch pad | |
| US20130162597A1 (en) | Optical touch control module | |
| CN103399671A (en) | Double-camera touch screen and touch pen thereof | |
| KR101296722B1 (en) | Touch screen device using optical fiber | |
| KR101497416B1 (en) | Touch screen device with two-dimensional conductive sensing network | |
| KR101666490B1 (en) | Touchscreen device having conductive sensor | |
| JP7471432B2 (en) | Liquid crystal module, electronic device, and screen interaction system | |
| JP2006268111A (en) | Coordinate input device | |
| JP3161486U (en) | Pointer input device | |
| KR101808523B1 (en) | Optical Touch Input Device and Driving Method for the Same | |
| CN103793108A (en) | Touch screen and matched touch pen | |
| US20130161491A1 (en) | Optical touch control module | |
| JP2005128693A (en) | Coordinate input device, its control method, and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |