CN101587254B - Touch induction liquid crystal display - Google Patents
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- CN101587254B CN101587254B CN2009101418729A CN200910141872A CN101587254B CN 101587254 B CN101587254 B CN 101587254B CN 2009101418729 A CN2009101418729 A CN 2009101418729A CN 200910141872 A CN200910141872 A CN 200910141872A CN 101587254 B CN101587254 B CN 101587254B
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Abstract
The invention discloses a system, a method and a technology for integrating the touch induction function to a liquid crystal display. In a special embodiment, a photo induction detector is arranged on a backlight plate for detecting the light change incident on the backlight plate for responding a physical touch on the LED surface and estimating a position of the physical touch based on the signals received from the photo induction detector. A searching table stores comparison result of signal intensity detected by the detector aiming at each touch position in a forecasting process, each comparison result matches one ID corresponding to a touch position. The ID of the touch position stored in the searching table is searched and the touch position is identified at least partially according to the comparison result of the signal intensity detected by the current touch induction optical detector.
Description
Technical field
The present invention relates to a kind of LCD with touch sensing function.
Background technology
LCD (LCD) extensively is implemented in many display application, as graphoscope, PDA(Personal Digital Assistant), common information booth (kiosk), mobile phone display screen etc.Touch inductive display screen allows the user to use various input medias to select the specific region on screen, as long as touch that zone of display screen simply or will touch or just passable near that zone such as objects such as finger, pointer (stylus) or pens.
A kind of method that touch sensing function is integrated into LCD display comprises photosensor array is integrated in Thin Film Transistor (TFT) (TFT) base plate of LCD display.This photosensor array can be sensed one or more objects on display screen by detecting shade or the reflected by objects light that object blocks bias light, as finger.This photosensor array has different structures, contains the material that is different from LCD TFT base plate.So, these sensor arraies are integrated in the TFT base plate can increase the manufacturing process step usually.This can increase the complicacy of manufacturing expense and display, also can reduce the output of display.In addition, this photosensor array can be reduced in the pixel aperture of LCD display than (aperture ratio of pixel), influences the performance of display.Up to now, this method only limits to the small size LCD display owing to make difficulty.
So, expecting to have a kind of LCD display with touch sensing function, it can significantly not increase cost, and can not influence the performance of display.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes following technical scheme:
A touch sensitive dis-play comprises:
A LCD display, one side have a light guide plate, and opposite side has a LCD backlight;
Described LCD backlight, comprise at least one visible light source and at least one touch sensible photo-detector, this at least one visible light source is configured to and sends visible light and pass described LCD display, this at least one touch sensible photo-detector is positioned on the described backlight with the detecting touch induction light
Wherein be the lip-deep touch of the described light guide plate of response, described at least one touch sensible photo-detector is used to survey the variation of the touch sensible light that incides on the described backlight,
A lookup table is stored in the forecasting process comparative result of the signal intensity that is detected by detector at each touch location, the ID of every group of corresponding corresponding touch location of comparative result,
The comparative result of the signal intensity of being surveyed according to current touch sensible photo-detector is searched the ID that is stored in touch location in the lookup table at least in part, identifies touch location.
The operation method of a kind of touch sensible LCD comprises:
The visible light that sends from least one visible light source that is placed on the backlight passes LCD display;
For responding, receive one or more signals from least one the touch sensible photo-detector that is placed on the described backlight in the lip-deep touch of described LCD display; With
Handle the described signal that receives and calculate position in the described lip-deep described touch of described LCD display, wherein, lookup table has been stored in forecasting process the comparative result of the signal intensity that is detected by detector at each touch location, the ID of every group of corresponding corresponding touch location of comparative result, the comparative result of the signal intensity of being surveyed according to current touch sensible photo-detector at least in part, search the ID that is stored in touch location in the lookup table, identify touch location.
Description of drawings
Describe the feature of non-limiting and nonexcludability of the present invention with reference to the following drawings, wherein identical reference code is represented identical parts in each accompanying drawing, wherein:
Fig. 1 is the schematic cross-section of the touch sensible LCD of an embodiment;
Fig. 2 is the synoptic diagram of the touch sensible LCD of an embodiment;
Fig. 3 is the schematic cross-section of the touch sensible LCD that comprises pressure transport membranes (pressure transfer film) of an embodiment;
Fig. 4 is the schematic cross-section of the LCD display of an embodiment;
Fig. 5 A and 5B are the planimetric maps of the optional embodiment of a back light unit, be equipped with on this back light unit the touch sensible photo-detector and visible light source;
Fig. 6 be according to an embodiment describe processing from the signal of touch sensible photo-detector to estimate the process flow diagram of a physics touch location on the LCD display surface;
Fig. 7 describes a kind of lookup table of using according to an embodiment and obtains the special technology that the physics touch is estimated on LCD display; With
Fig. 8 describes the process flow diagram that some aspects that a last touch location is estimated, LCD display surface are provided according to an embodiment.
Embodiment
In the following detailed description, a plurality of special details have been set forth so that can complete understanding the present invention.But it will be understood to those of skill in the art that does not need these special details can implement the present invention yet.In addition, for the ease of clearly describing the present invention, method well-known to those skilled in the art, device or system will can not be described in detail.
In whole instructions, " embodiment " is meant that special feature, result or a characteristic describing in conjunction with a special embodiment may be included at least one embodiment of the invention.Therefore, each local " in the embodiment " who occurs at instructions not necessarily is meant same embodiment or described any one special embodiment.In addition, be appreciated that described special feature, structure or characteristic can combinations in every way in one or more embodiment.Usually, these or other problems can change with the use of specific context certainly.So the description of specific context or the use of these terms can help understands context.
According to special embodiment, in order to provide one to have touch sensing function but can significantly not increase the LCD display of cost and complicacy, the back light unit of a LCD display can comprise fixing photo-detector or sensor, and it can be to the variation of the incident light that caused by touch and responds.The signal that receives from photo-detector can be processed and be calculated position in the lip-deep touch of LCD display.By photo-detector is placed on the back light unit, can avoid integrated photosensor array to interior relevant complicacy and the expense of the TFT of LCD display base plate.
Fig. 1 is the sectional view of the embodiment of a touch sensible LCD 100, comprising: an optics light guide plate 101, and at least one touch sensible radiant 104 is positioned in its edge; A LCD display 102 and a back light unit 103.
Optics light guide plate 101 can be the plate of a homogeneous transparent, and as acrylic panel (acrylic plate) or poly (methyl methacrylate) plate, its refractive index is greater than 1.0.The thickness of optics light guide plate 101 can be at 4.0mm in the scope of 20.0mm.But, should be appreciated that, can use different thickness and material.Touching quick light source 104 and can send non-visible light, is the near infrared light of 750nm to 1000nm as wavelength coverage, passes the edge surface of light guide plate 101 and enters in the optics light guide plate 101.But, should be appreciated that, can use the light of different wave length.As everyone knows, when light from high index n
1Medium enter another than low-refraction n
2Medium, if in borderline incident angle greater than a critical angle θ
c, can experiences total internal reflection.Can utilize Snell law formula n
1* sin (θ
c)=n
2, calculate critical angle θ
cFor example, in this example, if light guide plate 101 is acrylic panels, its refractive index approximately is n
1=1.5, and another kind of material is an air, refractive index is approximately n
2=1.0, critical angle can be defined as about 41.8 ° so.So, on the border of light guide plate 101 and air, if angle of light greater than 41.8 °, light just can be reflected fully and is limited in the light guide plate 101, and reflections propagate between surface and the lower surface thereon.The light that is limited in the light guide plate 101 is looked at as touch sensible light 110.In case have the object such as finger to touch the surface that touches optics light guide plate 101, internal reflection just is interrupted, because light no longer is limited in the optics light guide plate 101, but overflows to respond this touch from light guide plate 101.These light that overflow are expressed as 109 in Fig. 1.
For the touch object of different materials and size is made a more unified response, can above optics light guide plate 101, place a pressure transport membranes (pressure transfer film).As shown in Figure 3, pressure transport membranes 330 is placed near light guide plate 101.A very little clearance is arranged between pressure transport membranes 330 and the light guide plate 101, make when having touch pressure transport membranes 330 surperficial, can not keep internal reflection.In special an enforcement, pressure transport membranes 330 can be transparent and flexibility.Touch the object applied pressure in order to respond, depression takes place and touches light guide plate 101 in the local part of the pressure transport membranes 330 that is touched, thereby interrupts the internal reflections in the light guide plate 101 and make light overflow, as mentioned above.At this, pressure transfer film 330 deforms because touch, thereby touches the surface of light guide plate 101, and causes the total internal reflection of light in light guide plate 101 to be interrupted.As a result, a part of light 109 overflows light guide plate from contact position.Especially, the thickness of pressure transfer film 330 can be in 0.2mm arrives the scope of 5.0mm.
According to an embodiment, touch sensible radiant 104 can be that maximum emission wavelength (peakemission wavelength) is greater than 850nm but less than the infrared light-emitting diode (LED) of 1000nm.High-power light emitting LED in this wavelength coverage can not disturb the image that shows on the LCD display 102.Touch sensible radiant 104 can be fixed to printed circuit board (PCB) (PCB does not show among the figure) by welding, is positioned in as shown in the figure on the edge of light guide plate 101.Touch sensible radiant driving circuit 204 can be controlled the luminous intensity of light source 104 according to signal and/or the instruction from touch sensible LCD control module 220.For coupling light in the light guide plate 101 of will sending effectively, if light guide plate 101 is acrylic panel or poly (methyl methacrylate) plate, touch sensible radiant 104 can have one less than 40 ° half-intensity beam angle.In this context, half-intensity beam angle is a such angle, promptly is reduced to half angle of its maximum emission intensity from the light intensity of light source.At this, touch sensible radiant 104 can be settled with certain angle with respect to light guide plate 101 edges.
In special an enforcement, LCD display 102 can comprise a sandwich construction as shown in Figure 4.Two glass substrates 403 and 404 have the polaroid (polarizer) 401 and 402 that is attached on a side respectively.Red 405, green 406 and blue 407 color filter layers be fabricated on the glass substrate 403.Each filter layer makes corresponding visible light to pass.For example, red filter layer 406 only allows the visible light of red wavelength to pass.On these filter coatings, be placed a transparency conducting layer 408, as the public electrode (as on pel array, sharing a public electrode) of LC by a plurality of pixels.Pixel electrode 409 mutual insulatings.Pixel electrode 409 can be driven and/or apply voltage by pixel TFT 410 separately.Liquid crystal layer 411 is sandwiched between public electrode 408 and the pixel electrode 409.At liquid crystal layer 411, according to the voltage that applies on the pixel electrode 409, the liquid crystal molecule that can align, and the light transmission that related pixel is passed in control.For example, according to the command signal from touch sensible LCD control module 220, LCD pixel-driving circuit 202 can apply a suitable voltage and arrive pixel electrode 409 through pixel TFT 410.
Although the light transmission by pixel can change by the voltage that adjustment is applied to a related pixel electrode 409, but the light transmission of passing through the LCD pixel that this is adjustable is not suitable for the infrared ray of wavelength greater than 850nm because polaroid can not polarization greater than the electromagnetic wave of 850nm.In addition, filter coating is to infrared ray inoperative (being that infrared ray can pass the color filter coating).Checking after tested, when showing a dark image, about 70% infrared ray (maximum emission wavelength 880nm) can pass LCD display.Therefore, the light 109 that overflows can pass LCD display 102 and arrive back light unit 103.
According to special embodiment, Fig. 5 A and 5B are the planimetric maps of White LED light source 105 and photo-detector 106 configurations.Detector 106 is evenly distributed in the middle of the back light 105 with lattice.Spacing between any two detectors 106 can be according to selecting such as cost and touch resolution or precision.Little spacing means the more detector of needs, causes higher cost.If the spacing between two detectors is very big, some detector signals may not be strong enough to estimates touch location exactly.In an example, the spacing between two detectors is configured near the distance between LCD display and the backlight (as about 40mm).For a Diagonal Dimension is 32 inches touch sensible LCD, can use 144 detectors, and this will be less than the detector number that is integrated in usually in the LCD display far away, and it is identical with the number of LCD display pixel usually.Few more detector also allows to use few more signal processing resources.As shown in Figure 2, induction light signal detection circuit 206 can be used to receive and handle the signal from photo-detector 106.
The output signal of photo-detector 106 can be an analog signal form, and it is converted into digital signal by an analog to digital conversion (ADC) device (not shown), and analog-digital commutator is integrated in 206 li of induced signal detection circuits.These digital signals are analyzed by a digital signal processing circuit (not shown) and are determined a coordinate that touches object, and digital signal processing circuit also is integrated in 206 li of signal detection circuits.But other combination of programmed processor, software and/or hardware can be used to processing digital signal.How processing digital signal is calculated the position that a physics touches to flow chart description shown in Figure 6 according to a special embodiment.
Because the spectrum of surround lighting is to small part and the spectra overlapping that touches light, and since surround lighting along with different environment and service condition can change, surround lighting can increase ground unrest and cause and survey failure.In order to reduce this noise effect that is caused by surround lighting, testing process can be divided into two cycles.At this, touch sensible radiant 104 can be opened in the period 1, and is closed in second round.At first, the digital signal processing circuit of induction of signal detection circuit 206 is surveyed received signal (module 601) in first time interval of detect cycle, then, with the value storage of these signal corrections in a storer, this storer can be by the visit of signal processing circuit numeral.Then, in module 602, signal processing circuit is surveyed received signal in second time interval of detect cycle.Then, thus the signal numerical value that module 603 was surveyed in the period 1 deducts the signal value that the signal numerical value of surveying in second round obtains being used for calculated touch location.Utilize said process, can reduce or reduce the ground unrest of surround lighting.
Subtraction on the module 603 and the signal that obtains can be processed to estimate a physics touch location on the LCD display 102.The calibration value of photoinduction detector 106 can be based on the non-uniform sensitivity of white-noise level and single detector 106, is stored in the storer of digital signal processing circuit before it.These calibration values can by in the fully dark environment and the signal value of the detector of measuring in the environment at even optical illumination 106 obtain.In module 604, the numerical value that obtains from subtraction can compare by the calibration value corresponding with it, and corrects the non-homogeneous response characteristic of detector 106, as sensitivity and white noise.In module 605, the numerical value that obtains on module 604 can also compare with a threshold value that is stored in before in the digital signal processing circuit, extracts the signal of numerical value greater than threshold value.
According to an embodiment, for response changes at the lip-deep distance function that touches between the position that the signal intensity that receives on the photoinduction detector 106 touches on along with photoinduction detector 106 and LCD display 102 surfaces of LCD display 102.Thus, compare from touching the farther touch sensible photo-detector 106 of object 107 lateral separations with those, laterally the touch sensible photo-detector 106 of more close touch object 107 more is hopeful to receive a stronger light signal (i.e. the light 109 that overflows from optics light guide plate 101).So, being the 102 lip-deep touches of response LCD display, touch sensible photo-detector 106 is used to survey the variation of the touch sensible light (as from overflowing light 109) that incides on the backlight.But, should be appreciated that this only is a kind of variation on the touch sensible light that can detect according to special embodiment, can survey other change type of this incident touch sensible light, and can not break away from the present invention.If photoinduction detector 106 has configuration as shown in Figure 5, the position of touch or point are in the zone of being defined by four detectors 106.At this, these four signals that detector 106 receives are greater than the signal that is received by other detector 106.
Be different from the photo-detector that is integrated in the LCD display, wherein the spacing between two adjacent detectors may only be the hundreds of micron, and touch can be located exactly by the peak signal numerical value in the zone.As described above, in the example that detector 106 is integrated in the back light unit 103, in order to use less detector (as based on cost consideration), the spacing between two detectors may approximately be 10 millimeters or bigger.In special an enforcement, in order to estimate a touch location on the LCD display 102 exactly, the signal intensity and the distribution situation of light intensity on backlight that can receive in conjunction with four detectors (as surrounding a zone that comprises touch location).For example, this light intensity distributions can characterize touch location and suspect a lateral separation between the position of detector 106 of picked up signal.In an optional enforcement, can utilize the mode of lookup table to come partly based on the signal strength values that obtains from detector 106 at least to being detected the touch location in device 106 delimited area.
As an example, can lookup table be set by the following stated method.Detector array on the backlight can be divided into a plurality of, and each piece comprises four detectors and the zone of being defined by these four detectors (106.1,106.2,106.3 and 106.4), and as shown in Figure 7, this delimited area evenly is divided into a plurality of subregions 701.Each subregion candidate's touch location of 701 expressions or point.Being stored in the data that are used for identifying a touch location 707 in the lookup table can utilize measurement result to calculate by experimental measurement to obtain again.For example, directly over position 707, touch tangible surface, four detectors in the position around 707 receive respectively and are labeled as S
1, S
2, S
3And S
4Signal intensity.The data that are used for discerning touch location 707 are comparative results of these four signal values.Comparative result can be (a, b, c), a=S wherein
2/ S
1, b=S
3/ S
1And c=S
4/ S
1Identical process can be used for other touch location and obtain a corresponding data carrying out location recognition.Then, each touch location is assigned with a sign (ID) data.
By the signal that on step 606, relatively obtains, and its comparative result is mapped to the ID that is stored in touch location in the lookup table, can identifies touch location (step 607).Then, be sent to touch sensible LCD control module 220 at 608, one touch locations that identify of module.According to the touch location of determining, control module 220 can provide a response signal and/or instruction, to upgrade the image that shows on the LCD display.
The flow chart description of Fig. 8 the implementation process of touch sensible LCD 100.As described above, in module 801, provide a touch sensible LCD 100, it comprises that LCD display 102, one sides have a light guide plate 101, and opposite side has a back light unit 103.Then, touch sensible radiant 104 is positioned on the edge of light guide plate 101, and back light and touch sensible photo-detector are positioned in the back light unit ( module 802A and 802B).At this, module 801,802A and 802B describe according to a special process of implementing to make touch sensitive dis-play.When carrying out, control module 220 can output image signal to LCD pixel-driving circuit 202 and according to the light transmission rate (module 803B) of picture signal change LCD pixel.Simultaneously, control module 220 can send signal and/or indication backlight drive circuit 205 and open visible light source 105, makes the image that shows on the LCD display be illuminated, and can be seen by the user (module 803C).Control module 220 can at first be indicated touch sensible radiant driving circuit 204 and be opened touch sensible radiant 104, thereby guiding touch sensible light 110 enters in the light guide plate 101 (module 803A).Touch light guide plate 101 surfaces for response touches object 107, some touch sensible light overflow (module 804) by reflection or refraction from light guide plate 101.The light 109 that overflows passes LCD display 102, and the detector 106 that is positioned on the back light unit 103 detects (module 805).Induced signal detection circuit 206 is collected in the result of detection that touches quick light on the photoinduction detector 106, and the transmission representative touches the coordinate information of estimated position to control module 220 (module 806).Then, for response touches request, control module upgrades LCD and goes up the image (module 807) that shows.
Method described herein can be implemented in every way, depends on the application according to special feature and/or example.For example, this method can be implemented with hardware, firmware, software and/or its array mode.For example, in hardware was implemented, processing unit can be one or more special ICs (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, electronic installation, other can carry out device unit and/or its combination of said function.
In this disclosed, " one ", " one or more ", " at least one " were counted as and are equal to.For example, describe one, will be counted as and to arrive more than one like instruction or notion by application class if disclose.
Though described example embodiment of the present invention in detail, it will be understood to those of skill in the art that not breaking away from and to make various modifications and equivalent under the condition of the present invention and replace.In addition, under the instruction of the present invention that does not break away from said central concept, can make many modifications.So the present invention is not limited to special embodiment described herein, the present invention also can comprise all embodiment and the equivalent thereof that belongs in the claims scope.
Claims (18)
1. touch sensitive dis-play comprises:
A LCD display, one side have a light guide plate, and opposite side has a LCD backlight;
Described LCD backlight, comprise at least one visible light source and at least one touch sensible photo-detector, this at least one visible light source is configured to and sends visible light and pass described LCD display, this at least one touch sensible photo-detector is positioned on the described backlight with the detecting touch induction light
Wherein be the lip-deep touch of the described light guide plate of response, described at least one touch sensible photo-detector is used to survey the variation of the touch sensible light that incides on the described backlight,
A lookup table is stored in the forecasting process comparative result of the signal intensity that is detected by detector at each touch location, the ID of every group of corresponding corresponding touch location of comparative result,
The comparative result of the signal intensity of being surveyed according to current touch sensible photo-detector is searched the ID that is stored in touch location in the lookup table at least in part, identifies touch location.
2. light guide plate according to claim 1, it comprises that at least one touch sensible radiant is positioned on its at least one side.
3. touch sensitive dis-play according to claim 1 also comprises a controller, and it is used to calculate the position of described touch.
4. touch sensitive dis-play according to claim 1, wherein said backlight comprise a substrate, and at least one visible light source is installed on it, and wherein said at least one touch sensible photo-detector is fixedly attached to described substrate.
5. touch sensitive dis-play according to claim 4, wherein said at least one touch sensible photo-detector is fixedly attached to described substrate by welding.
6. touch sensitive dis-play according to claim 1, also comprise a pressure transport membranes that is positioned in described LCD display surface, for the physics of response on described pressure transport membranes touches, wherein said at least one touch sensible photo-detector is used to survey the variation of the touch-sensing light that incides on the described backlight.
7. the operation method of a touch sensible LCD comprises:
The visible light that sends from least one visible light source that is placed on the backlight passes LCD display;
For responding, receive one or more signals from least one the touch sensible photo-detector that is placed on the described backlight in the lip-deep touch of described LCD display; With
Handle the described signal that receives and calculate position in the described lip-deep described touch of described LCD display, wherein, lookup table has been stored in forecasting process the comparative result of the signal intensity that is detected by detector at each touch location, the ID of every group of corresponding corresponding touch location of comparative result, the comparative result of the signal intensity of being surveyed according to current touch sensible photo-detector at least in part, search the ID that is stored in touch location in the lookup table, identify touch location.
8. method according to claim 7, the described signal that receives of wherein said processing also comprises: be based, at least in part, on the signal value that obtains from described at least one touch sensible photo-detector under the dark condition, the numerical value of calibration and the described signal correction that receives.
9. method according to claim 7, also comprise: pass light guide plate from touch sensible light to the small part that at least one touch sensible radiant on described light guide plate sends, the variation of the touch sensible light on described at least one touch sensible photo-detector is incided in the wherein said signal representative that receives.
10. method according to claim 9, the described variation of wherein inciding the described touch sensible light on described at least one touch sensible photo-detector are that the corresponding at least a portion touch sensible light that is caused by described touch overflows from described light guide plate.
11. method according to claim 7, the described signal that receives of wherein said processing also comprises:
From the described signal of a part that comprises ambient light noise, pick out the described signal that receives of at least a portion and the corresponding variation of inciding the touch sensible light on described at least one touch sensible photo-detector.
12. method according to claim 11, wherein said touch sensible light comprises non-visible light.
13. method according to claim 11, wherein from the described signal of a part that comprises ambient light noise, pick out the described signal that receives of at least a portion and the corresponding variation of inciding on described at least one touch sensible photo-detector of touching quick light, also comprise:
In the very first time interval of a detect cycle, also during the touch sensible radiant is unlocked, from described at least one touch sensible photo-detector received signal;
In second time interval of a detect cycle, also be during the touch sensible radiant is pent, from described at least one touch sensible photo-detector received signal; With
From the described signal of at least a portion that receives at interval in the described very first time, deduct the described signal of at least a portion that receives in described second time interval.
14. method according to claim 7, the described signal that receives of wherein said processing estimates that described position also comprises:
At least in part according to the signal value that receives from least two touch sensible photo-detectors,, and determine the position of described estimation at least in part according to one or more numerical value of in lookup table, selecting.
15. method according to claim 13 also comprises from a plurality of touch sensible photo-detector received signals, the described signal that receives of wherein said processing and calculate described touch location and also comprise:
At least in part according to the signal value that receives from described a plurality of touch sensible photo-detectors, according to one or more numerical value of in lookup table, selecting, in the zone that is surrounded by described a plurality of touch sensible photo-detectors, determine the position of described touch at least in part.
16. method according to claim 14 is wherein calculated according to the signal of measuring touch sensible photo-detector gained at least in part, obtains to be stored in the described numerical value in the described lookup table.
17. method according to claim 15 also comprises:
The signal value that receives from described touch sensible photo-detector relatively; With
Selection provides a plurality of touch sensible photo-detectors of highest signal value, determines the zone that is surrounded by described a plurality of touch sensible photo-detectors.
18. method according to claim 7 also comprises: at least in part according to the described calculating location of described touch, and on described LCD display the update displayed image.
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|---|---|---|---|
| CN2009101418729A CN101587254B (en) | 2009-05-19 | 2009-05-19 | Touch induction liquid crystal display |
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|---|---|---|---|
| CN2009101418729A CN101587254B (en) | 2009-05-19 | 2009-05-19 | Touch induction liquid crystal display |
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| CN101587254B true CN101587254B (en) | 2011-09-14 |
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|---|---|---|---|---|
| JP5934194B2 (en) * | 2010-06-09 | 2016-06-15 | バーント インターナショナル リミテッド | Modular position detection system and method |
| KR101698454B1 (en) * | 2010-10-22 | 2017-01-23 | 삼성디스플레이 주식회사 | Optical source assembly and touch screen device having the same |
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| CN108810195B (en) * | 2018-03-16 | 2021-03-09 | Oppo广东移动通信有限公司 | Electronic device and method for manufacturing the same |
| CN108845623B (en) * | 2018-07-31 | 2023-11-24 | Oppo广东移动通信有限公司 | Display screen assembly, electronic equipment and control method of electronic equipment |
| CN112667108A (en) * | 2021-01-04 | 2021-04-16 | 深圳市华星光电半导体显示技术有限公司 | Touch display device and touch method thereof |
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