CN102231032A - Touch-type liquid crystal lens and driving method thereof, three-dimensional display device and computer system - Google Patents
Touch-type liquid crystal lens and driving method thereof, three-dimensional display device and computer system Download PDFInfo
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- CN102231032A CN102231032A CN 201110132565 CN201110132565A CN102231032A CN 102231032 A CN102231032 A CN 102231032A CN 201110132565 CN201110132565 CN 201110132565 CN 201110132565 A CN201110132565 A CN 201110132565A CN 102231032 A CN102231032 A CN 102231032A
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Abstract
The invention discloses a touch-type liquid crystal lens panel, which comprises a first electrode structure, a second electrode structure and a liquid crystal layer, wherein the second electrode structure is formed opposite to the first electrode structure; the liquid crystal layer is formed between the first electrode structure and the second electrode structure; the first electrode structure, the liquid crystal layer and the second electrode structure are configured into a liquid crystal lens with a function of changing the light ray transmitting direction; and the first electrode structure, the liquid crystal layer and the second electrode structure are further configured into a touch position signal for detecting at least one touch occurring on the touch-type liquid crystal lens panel and representing the occurrence of the touch on the touch-type liquid crystal lens panel. The touch-type liquid crystal lens panel has the functions of the liquid crystal lens and multi-point touch and a simple structure. The invention further provides a three-dimensional display device and a computer system applying the touch-type liquid crystal lens panel.
Description
[technical field]
The invention belongs to the stereo display field, relate in particular to a kind of touch liquid crystal lens and driving method thereof, also relate to a kind of computer system of using the 3 d display device of touch liquid crystal lens and using this 3 d display device.
[background technology]
Along with the continuous development of liquid crystal technology, liquid crystal material is widely used in various fields.
For example, traditional optical zoom mirror group needs two above lens to cooperatively interact to move the effect that just can reach zoom at least.In actual application, this kind optical zoom mirror group is often comparatively thick and heavy and volume is big, brings great inconvenience for user's use.
LC Lens (Liquid Crystal Lens, liquid crystal lens) be a kind of utilize the liquid crystal molecule birefringent characteristic and change alignment characteristics with Electric Field Distribution allow light beam focus on or the optical module of dispersing.LC Lens can change the orientation of liquid crystal molecule by the change operating voltage, and then realizes the effect of focusing/zooming distance, and the frivolous characteristic of LC Lens is a big advantage especially, and it can reach effective optical zoom effect in little space.
Liquid crystal lens has widely to be used, and wherein a kind of typical case is applied as solid (3D) display application, and liquid crystal lens cooperates display device, the right and left eyes of the parallax picture beam split oriented users that display device is shown, thus make the user form stereoscopic vision.Can also realize simultaneously the handoff functionality of 2D/3D picture, user-friendly.
Along with the development of display technique, can give the user and refer to which control touching technique where also becomes the trend of display technique development gradually.If yet want in 3 d display device, to realize simultaneously stereo display and touch function, must in display device, use lens panel and touch panel to realize simultaneously.The use of two kinds of panels has increased the complexity of display device, causes the heaviness of display device, is inconvenient to carry.Simultaneously and since lens panel and touch panel might exist optics or electric on interference, this can influence display effect greatly, reduces user's experience.
[summary of the invention]
Technical matters solved by the invention provides a kind of touch liquid crystal lens and driving method, thereby realizes liquid crystal lens function and touch function on same panel simultaneously.The present invention also provides a kind of 3 d display device and computer system of using above-mentioned touch liquid crystal lens and driving method simultaneously.
A kind of touch liquid crystal lens panel comprises: first electrode structure; Second electrode structure that is oppositely arranged with first electrode structure; And be arranged at liquid crystal layer between described first electrode structure and second electrode structure;
Described first electrode structure, liquid crystal layer, second electrode structure are configured to have the liquid crystal lens that changes the light ray propagation directive effect;
Described first electrode structure, liquid crystal layer, second electrode structure also are configured to detect at least one touch that takes place on described touch liquid crystal lens panel, and are that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, described first electrode structure comprises a plurality of first electrodes along first direction extension and mutual electrical isolation, described second electrode structure comprises a plurality of second electrodes along second direction extension and mutual electrical isolation, and first direction intersects at second direction.
According to a preferred embodiment of the invention, also comprise driving circuit, described driving circuit is used to described a plurality of first electrode and described a plurality of second electrode that the liquid crystal lens drive signal is provided, touches drive signal and discerns the touch location signal that produces.
According to a preferred embodiment of the invention, described a plurality of first electrode and described a plurality of second electrode intersect a plurality of capacitance sensing nodes of formation, described capacitance sensing node is coupled to described driving circuit, and the touch location signal is discerned in the variation that described driving circuit provides drive signal for described capacitance sensing node and detects described capacitance sensing node.
According to a preferred embodiment of the invention, the separate work of described a plurality of capacitance sensing nodes and represent diverse location on the described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, described driving circuit comprises the liquid crystal lens driving circuit and touches driving circuit, described liquid crystal lens driving circuit provides the liquid crystal lens drive signal forming electric field between first electrode structure and second electrode structure for described first electrode structure and described second electrode structure, and the liquid crystal molecule in the described electric field driven liquid crystal layer rearranges to produce or to keep or change the liquid crystal lens effect; Described touch driving circuit provides the touch drive signal for described first electrode structure or described second electrode structure, and detects the touch location signal that described second electrode structure or described first electrode structure produce.
According to a preferred embodiment of the invention, described driving circuit also comprises signal coupling circuit, and described liquid crystal lens drive signal and described touch drive signal are coupled to described first electrode structure and described second electrode structure by described signal coupling circuit.
According to a preferred embodiment of the invention, described driving circuit also comprises the touch signal separation circuit, described touch signal separation circuit detects and separates the touch location signal of described first electrode structure or the generation of described second electrode structure, and the touch location signal is transferred to described touch driving circuit.
According to a preferred embodiment of the invention, the frequency of described liquid crystal lens drive signal is less than the frequency of described touch drive signal.
According to a preferred embodiment of the invention, described touch drive signal the threshold voltage that deflects less than liquid crystal molecule in the described liquid crystal layer of voltage magnitude.
According to a preferred embodiment of the invention, described first electrode and described second electrode are strip electrode.
According to a preferred embodiment of the invention, the bearing of trend of described first electrode and described second electrode is vertical substantially.
According to a preferred embodiment of the invention, the bearing of trend of described first electrode and described second electrode is vertical substantially.
According to a preferred embodiment of the invention, described a plurality of first electrode is parallel to each other, described a plurality of second electrodes are parallel to each other.
According to a preferred embodiment of the invention, described touch liquid crystal lens panel comprises also and is arranged on first both alignment layers between described first electrode structure and the described liquid crystal layer and is arranged on second both alignment layers between described second electrode structure and the described liquid crystal layer that described first both alignment layers and described second both alignment layers cooperatively interact so that the liquid crystal molecule of described liquid crystal layer is arranged along the initial arrangement direction.
According to a preferred embodiment of the invention, described touch liquid crystal lens panel also comprises first substrate and second substrate, and described first electrode structure is arranged on described first substrate, and described second electrode structure is arranged on described second substrate.
A kind of driving method of touch liquid crystal lens panel comprises:
Dispose described touch liquid crystal lens panel, form liquid crystal lens with change light ray propagation directive effect;
Dispose described touch liquid crystal lens panel, form a plurality of drive points that independently touch;
Detect the touch signal that produces on described a plurality of touch drive point to determine the position of touch signal at described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, any one touch liquid crystal lens panel in described touch liquid crystal lens panel the foregoing description.
A kind of driving method of touch liquid crystal lens panel, described touch liquid crystal lens panel comprises first electrode structure, and second electrode structure that is oppositely arranged of first electrode structure and be arranged at liquid crystal layer between described first electrode structure and second electrode structure, and described driving method comprises:
Dispose voltage between described first electrode structure and second electrode structure changing the arrangement of the liquid crystal molecule in the liquid crystal layer, thereby form liquid crystal lens;
Dispose the voltage between described first electrode structure and second electrode structure, form a plurality of touch drive points;
Detect the touch signal that produces on described a plurality of touch drive point to determine the position of described touch signal at described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, detect the touch signal process that produces on described a plurality of touch drive point and comprise that the filtering to touch signal has reduced undesired signal.
A kind of 3 d display device comprises: display panel and the touch liquid crystal lens panel that is arranged on the display panel, and described touch liquid crystal lens panel comprises: first electrode structure; Second electrode structure that is oppositely arranged with first electrode structure; And be arranged at liquid crystal layer between described first electrode structure and second electrode structure;
Wherein, described first electrode structure, liquid crystal layer, second electrode structure are configured to have the liquid crystal lens that changes the light ray propagation directive effect, thereby the image with parallax that described display panel is shown transfers to the predetermined field of view direction;
Described first electrode structure, liquid crystal layer, second electrode structure also are configured to detect at least one touch that takes place on touch liquid crystal lens panel, and are that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, described 3 d display device also comprises head tracking circuit, image processing circuit, described head is followed the trail of circuit and is used to gather user's head portrait positional information, and described image processing circuit is adjusted display image according to user's head portrait positional information.
According to a preferred embodiment of the invention, described head is followed the trail of circuit and is comprised head portrait capturing apparatus and head portrait position analysis circuit, described head portrait capturing apparatus is used to absorb user's head image information, and described head portrait position analysis circuit is used for according to the position of user's head image information identification user head portrait with respect to described 3 d display device.
According to a preferred embodiment of the invention, described touch liquid crystal lens panel also comprises touch liquid crystal lens driving circuit, thereby described touch liquid crystal lens driving circuit drives described touch liquid crystal lens panel makes it form liquid crystal lens, and adjusts the optical parametric of the liquid crystal lens of described touch liquid crystal lens panel formation according to user's head portrait positional information.
According to a preferred embodiment of the invention, described touch liquid crystal lens driving circuit comprises the touch driving circuit, and described touch driving circuit drives described touch liquid crystal lens panel and detection and Identification and is created in touch location signal on the described touch liquid crystal lens panel.
According to a preferred embodiment of the invention, described first electrode structure comprises a plurality of first electrodes along first direction extension and mutual electrical isolation, described second electrode structure comprises a plurality of second electrodes along second direction extension and mutual electrical isolation, and first direction intersects at second direction.
According to a preferred embodiment of the invention, described a plurality of first electrodes and described a plurality of second electrode intersect a plurality of capacitance sensing nodes of formation, discern the touch location signal by the variation that detects described a plurality of capacitance sensing nodes.
According to a preferred embodiment of the invention, the separate work of described a plurality of capacitance sensing nodes and represent diverse location on the described touch liquid crystal lens panel.
A kind of computer system comprises: processor, the operation that it is configured to execute instruction and execution is relevant with computer system; 3 d display device, it is operatively coupled to described processor.Described 3 d display device comprises: display panel and be arranged on touch liquid crystal lens panel on the display panel.Described touch liquid crystal lens panel is configured to have the liquid crystal lens that changes the light ray propagation directive effect, thereby the image with parallax that described display panel is shown transfers to the predetermined field of view direction, described touch liquid crystal lens panel is configured also to be configured to detect at least one touch that takes place on described touch liquid crystal lens panel, and is that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel;
Described processor is carried out relevant computer operation according to the touch location signal that described touch liquid crystal lens panel produces.
According to a preferred embodiment of the invention, described touch liquid crystal lens panel is any one the touch liquid crystal lens panel in the foregoing description.
Compared to prior art, touch liquid crystal lens panel only uses a panel, by configuration to electrode, liquid crystal etc., can realize liquid crystal lens and touch two kinds of functions, simplified the structure of product, reduced the thickness of product, adopted above-mentioned touch liquid crystal lens panel electronic installation more frivolous thereby make; Simultaneously,, avoided touching the interference between drive signal and the liquid crystal lens drive signal like this, helped to keep the stability of touch liquid crystal lens panel owing to realize that the electric voltage frequency of the drive signal of liquid crystal lens and touch control function can be different with amplitude.
Simultaneously, independent control can be realized, multi-touch function can be realized because each of touch liquid crystal lens panel touches drive point, user-friendly greatly.
Compared to prior art, computer system has adopted panel display board and touch liquid crystal lens panel, can integrate three-dimensional display function and multiple point touching control function, user friendly operation under the situation of not obvious increase device thickness and complexity; Simultaneously, the cooperation that computer system is also followed the trail of circuit by first-class head portrait capturing apparatus of shooting and head, detect customer location in real time, and by image processing circuit and adjustment display frame of liquid crystal lens driving circuit and liquid crystal lens, make the user be in best viewing location all the time, promoted user's vision and operating experience greatly.
[description of drawings]
Fig. 1 is the structural representation that Fig. 1 is shown a preferred embodiment of touch liquid crystal lens panel provided by the invention;
Fig. 2 is the schematic perspective view of the part-structure of touch liquid crystal lens panel shown in Figure 1;
Fig. 3 is the synoptic diagram of touch liquid crystal lens panel and driving circuit thereof;
Fig. 4 is another synoptic diagram of second electric field in first preferred embodiment of the present invention;
Fig. 5 is the touch liquid crystal lens panel part-structure synoptic diagram when realizing the liquid crystal lens function;
Fig. 6 is the constitutional diagram that touch liquid crystal lens panel forms liquid crystal lens;
Fig. 7 is the structural representation of computer system of the present invention.
[embodiment]
The present invention is described in detail below in conjunction with drawings and Examples.
Touch liquid crystal lens panel provided by the invention comprises two electrode structure and the liquid crystal layers that are provided with at interval.Wherein, liquid crystal layer is arranged between two electrode structures, and liquid crystal layer comprises a plurality of liquid crystal molecules.
In specific implementation process, by configuration, electric field between these two electrode structures, electric field makes liquid crystal molecule be in predetermined ordered state, changes the direction of propagation of light, so that liquid crystal layer has lens effect.Further, this electrode structure also constitutes variable capacitance, form to touch drive point, by apply driving voltage on an electrode of variable capacitance, surveys voltage/current on another electrode and changes and realize that capacitor type touches positioning function.
See also Fig. 1, Fig. 1 is shown the structural representation of a preferred embodiment of touch liquid crystal lens panel provided by the invention.In the present embodiment, touch liquid crystal lens panel 100 comprises first substrate 11, first electrode structure 12, first both alignment layers 13, liquid crystal layer 14, second both alignment layers 15, second electrode structure 16 and second substrate 17 successively.
Please consult Fig. 2 simultaneously, Fig. 2 is the perspective view of touch liquid crystal lens panel 100 shown in Figure 1, is the convenient present embodiment of describing, and only shows the part exemplary configuration of touch liquid crystal lens panel 100 among Fig. 2.Wherein, first electrode structure 12 is arranged on first substrate 11, comprises a plurality of first strip electrodes 121.A plurality of first strip electrode, 121 spaces and electrical isolation setting, and extend along the first bearing of trend D1.Fig. 2 has exemplarily shown four first strip electrode 121a, 121b, 121c, 121d.
In specific implementation process, the first bearing of trend D1 and the second bearing of trend D2 intersect mutually.Preferably, the first bearing of trend D1 is vertical mutually with the second bearing of trend D2.Thereby the cross matrix lattice structure that first strip electrode 121 and second strip electrode 161 are formed as shown in Figure 3.
Include the liquid crystal molecule of arranging along the initial arrangement direction 141 in the liquid crystal layer 14.First both alignment layers 13 and second both alignment layers 15 cooperatively interact so that liquid crystal molecule 141 is arranged along the initial arrangement direction.In the present embodiment, by modes such as friction matching or radiation orientations, make the alignment direction of the alignment direction of the both alignment layers 13 of winning and second both alignment layers 15 all parallel, make the initial arrangement direction of liquid crystal molecule be parallel to the second bearing of trend D2 with the second bearing of trend D2.
Preferably, first substrate 11 and second substrate 17 are glass substrate, can certainly be the transparency carriers of other material, as long as make light to see through, do not enumerate one by one herein.
Preferably, first strip electrode 121, second strip electrode 161 are transparency conducting layer, for example can be indium tin oxide (Indium Tin Oxide, ITO) or indium-zinc oxide (Indium Zinc Oxide IZO), does not enumerate herein one by one.
According to said structure, cooperate suitable driving method, touch liquid crystal lens panel 100 can be realized the combination of touch function and liquid crystal lens function.
See also Fig. 4, touch liquid crystal lens panel 100 further comprises touch LCD lens drive circuit 190.Touch LCD lens drive circuit 190 can comprise liquid crystal lens driving circuit 191, touch driving circuit 192, signal coupling circuit 193 and touch signal separation circuit 194.Liquid crystal lens driving circuit 191 is used to produce the liquid crystal lens drive signal, as driving voltage, and the liquid crystal lens drive signal is transferred to signal coupling circuit 193; Touch driving circuit 192 and be used for producing and touch drive signal,, and will touch drive signal and be transferred to signal coupling circuit 193 as driving voltage; Signal coupling circuit 193 is transferred to first electrode structure 12 and second electrode structure 16 respectively, thereby produces corresponding liquid crystal lens or touch function after liquid crystal lens drive signal and touch drive signal are coupled as a composite signal.Touch signal separation circuit 194 is electrically coupled to second electrode structure 16, is used for second electrode structure 16 is touched the detecting voltage separation and is transferred to touch driving circuit 192, finishes the identification to touch location.
Below specifically introduce the realization principle of liquid crystal lens function and touch function.
For the liquid crystal lens function, thereby when applying certain voltage on a plurality of first strip electrodes 121 and a plurality of second strip electrode 161 and between a plurality of first strip electrodes 121 and a plurality of second strip electrode 161, form the electric field that certain rule distributes, liquid crystal molecule 141 in the electric field driven liquid crystal layer 14 changes orientation according to the regularity of distribution of electric field, make the ray refraction rate of 14 pairs of special polarization state of liquid crystal layer present parabola shaped variation, thereby make liquid crystal layer 14 have the effect that changes the light ray propagation direction, form liquid crystal lens.
More specifically, please consult Fig. 4 and Fig. 5 simultaneously, liquid crystal lens driving circuit 191 applies equal reference voltage Vref or no-voltage by signal coupling circuit 193 on the first strip electrode 121a, 121b, 121c, 121d, on a plurality of second strip electrode 161a, 161b, 161c, 161d, apply simultaneously suitable liquid crystal lens driving voltage V1, V2, V3 and V4, wherein, for guaranteeing to form good lens effect, V1, V2, V3, V4 for example can be that the voltage of sinusoidal variation distributes for having periodically variable voltage.Like this, form corresponding voltage difference between a plurality of first strip electrodes 121 and second strip electrode 161, these a plurality of voltage differences produce periodically variable electric field in liquid crystal layer 14.Liquid crystal molecule 141 orientation under effect of electric field in the liquid crystal layer 14 changes.In liquid crystal layer 14, the deflection angle of the liquid crystal molecule 141 of zones of different changes with electric field change, make liquid crystal layer 14 refractive indexes in certain zone, present parabola shaped variation, make liquid crystal layer 14 have the effect of liquid crystal lens, realize the purpose that focuses on or disperse thereby reach.Be illustrated in figure 6 as the constitutional diagram behind the formation liquid crystal lens under electric field driven, owing to periodically variable liquid crystal lens driving voltage is applied on second strip electrode 161, so the bearing of trend of liquid crystal lens is the second bearing of trend D2 shown in Figure 2.
In first preferred embodiment, in order to accelerate the time that liquid crystal layer produces lens effect, produce in the process of lens effect at liquid crystal layer 14, voltage V1, V2, V3 and V4 adopt overdrive voltage (overdrive voltage), make voltage V1, V2, V3 and V4 cooperate formation one overdrive voltage poor with no-voltage or reference voltage Vref.This overdrive voltage difference produces bigger electric field in liquid crystal layer 14, make the pace of change of liquid crystal molecule 141 under bigger effect of electric field accelerate.After in due course, voltage V1, V2, V3 and V4 switch to burning voltage again, make to keep steady voltage difference in the liquid crystal layer 14, and this burning voltage official post liquid crystal layer 14 keeps lens effects.Because the overdrive voltage difference, has been quickened the time that liquid crystal lens produces lens effect greatly greater than steady voltage difference.
At a time change the distribution or the optical parametric of liquid crystal lens as need, can change the voltage regularity of distribution that is applied on second strip electrode 161 by liquid crystal lens driving circuit 190, thereby regulate the optical parametric of liquid crystal optical lens, as focal length, pitch etc., equally, adopt the type of drive of dynamic electric voltage, also can make liquid crystal lens carry out left and right sides translation, can realize complete controlled liquid crystal lens like this, to be applied to stereo display better.
As can be seen, the voltage between first strip electrode 121 and second strip electrode 161 has the effect of generation, maintenance, change liquid crystal lens effect.
Be appreciated that, can exchange the voltage of first strip electrode 121 and second strip electrode 161 equally, promptly, apply periodically variable liquid crystal lens driving voltage at a plurality of first strip electrodes 121, on a plurality of second strip electrodes 161, apply equal reference voltage, thereby the bearing of trend that makes the liquid crystal lens of formation is changed to along first direction D1, and the arrangement of liquid crystal lens just produces the rotation of 90 degree.This type of drive produces vital role in some special application, during as the above-mentioned liquid crystal lens of application in portable display device, when display frame produces 90 degree rotations, need the corresponding rotations of adjusting liquid crystal lens generation 90 degree could realize stereo display, above-mentioned type of drive then can satisfy this generic request.
For touching positioning function, because liquid crystal layer 141 can be regarded approximate insulating material as, a plurality of first strip electrodes 121 intersect mutually with a plurality of second strip electrodes 161, form matrix structure as shown in Figure 3.The point of crossing of each first strip electrode 121 and second strip electrode 161 forms Inductance and Capacitance like this, each Inductance and Capacitance forms one and independently touches drive point, the variation of the capacitance parameter by surveying each point of crossing can realize the function of capacitive touch screen.
More specifically, please consult Fig. 3, Fig. 4 and Fig. 5 simultaneously, touch driving method and comprise:
Produce drive signal: touch driving circuit 192 and apply touch driving voltage Vt to the first strip electrode 121a by signal coupling circuit 193, because the Inductance and Capacitance effect, the infall of the second strip electrode 161a, 161b, 161c, 161d and the first strip electrode 121a generates electric charge respectively.The influence that is subjected to outer electrode owing to this Inductance and Capacitance easily changes capacitance, so Inductance and Capacitance can be regarded as and is variable capacitance;
Read touch signal: touch signal separation circuit 194 at first reads its capacitance parameter from the second strip electrode 161a, as voltage, electric current etc., and filter other undesired signals, for example stray capacitance signal, liquid crystal lens drive signal etc., and the touch signal that filters fed back to touch driving circuit 192;
Identification touch signal: after touching driving circuit 192 and receiving touch signal separation circuit 194 feedback touch signals, the current signal (or predetermined reference value) that reads that read signal and a last moment is discerned and judged whether current this position has touch action.Particularly, if current time has the point of crossing of the finger touch second strip electrode 161a and the first strip electrode 121a, then finger constitutes an electrode, finger forms capacity effect with the first strip electrode 121a, it influences the Inductance and Capacitance value of the second strip electrode 161a and first strip electrode 121a formation, reduced the Inductance and Capacitance value between the second strip electrode 161a and the first strip electrode 121a specifically, to redistribute electric charge this moment on the second strip electrode 161a, form induced current, judge that present bit is equipped with touch signal this moment, identifies current touch location signal; If the voltage that reads, current value with respect to the reference value no change, are then judged current location no touch signal;
Continue the point of crossing touch signal of the identification second strip electrode 161b, 161c, 161d etc. and the first strip electrode 121a then respectively, this process is similar with the touch signal step of the point of crossing of the identification second strip electrode 161a and the first strip electrode 121a, repeats no more.
Adopt above-mentioned same method can further discern the touch signal of arbitrary first strip electrode 121 and arbitrary second strip electrode 161 point of crossing, realize full frame touch signal identification, this is a scanning recognition cycle.
Touch driving circuit 192 and also comprise all touch signals that touches drive points are carried out compound calculating, as the touch area being judged etc., and discern current touch control action etc. according to the variation of touch location.
As can be seen, because arbitrary first strip electrode 121 is separate with the touch drive point that arbitrary second strip electrode 161 point of crossing form, and can carry out independent identification to the touch signal that touches drive point, a full screen scanning can be discerned M*N touch signal in theory, realizes multiple point touching.Multiple point touching is particularly important for current computer systems, can realize multiple operational order by multiple point touching, improves user experience.
The area of touch point of considering the user is generally bigger, and as approximating the area of ordinary people's finger touch greatly, therefore to the identification of touch point area and particularly important, this helps more accurate senses touch to move and touch location.
Further, for realizing the once identification of full frame touch signal, the scanning times of electrode is M*N, and wherein M is that number, the N of first strip electrode 121 are the number of second strip electrode 161.And in order to cooperate display frame and other control, full screen scanning frequency F generally arrives the hundreds of hertz tens.In sum, the sweep frequency of electrode should be M*N*F, its numerical value even can reach more than several thousand to several ten thousand hertz.When general liquid crystal molecule produces the deflection response, require just can respond below the change frequency hundreds of hertz of electric field.Under above-mentioned high-frequency touch drive signal scanning, liquid crystal molecule 141 in the liquid crystal layer 14 has little time to carry out the deflection response, just touch drive signal the deflection angle of liquid crystal molecule 141 is become influence inadequately, thereby also the formation and the control of liquid crystal lens is not exerted an influence.Just, in the forming process of liquid crystal lens, liquid crystal layer 14 has been born the function that changes the light refraction direction; And in the process that touches control, liquid crystal layer 14 has only been born the function of transparent dielectric, and two kinds of functions are not disturbed mutually, realizes the coexistence of liquid crystal lens and touch function, and this point is particularly important.
According to liquid crystal lens and touch the requirement difference of control to electric field frequency, can with the liquid crystal lens drive signal with touch drive signal and be coupled by signal coupling circuit 193, form composite signal.For example can in the touch drive signal of high frequency narrow pulsewidth, insert the liquid crystal lens drive signal of the high pulsewidth of low frequency, make touch drive signal and liquid crystal lens drive signal transfer to first strip electrode 121 and/or second strip electrode 161 simultaneously; Also can in certain period of time, only allow touch drive signal or liquid crystal lens drive signal to transfer to first strip electrode 121 and/or second strip electrode 161 by signal coupling circuit 193 controls.
Further, in realizing the liquid crystal lens merit, need liquid crystal molecule 141 to produce corresponding oblique arrangement, this requires to have higher electric field intensity between first strip electrode 121 and/or second strip electrode 161, and electric field intensity produces the threshold value of deflection greater than liquid crystal molecule; And to realize touch control function, only need first strip electrode 121 and/or second strip electrode to form certain electric field (being the Inductance and Capacitance effect), the easier influence that is subjected to external condition of this electric field so just is more conducive to the influence of senses touch action to Inductance and Capacitance, and identification touches control action.Therefore, can also utilize above-mentioned characteristic to design and touch drive signal and liquid crystal lens drive signal strength, avoid touching the interference between drive signal and the liquid crystal lens drive signal.For example can design the threshold voltage that the electric field intensity that touches drive signal deflects less than liquid crystal molecule, even like this under some opposite extreme situations, touch drive signal and liquid crystal lens drive signal and produce interference, also be unlikely to help to keep the stability of touch liquid crystal lens panel 100 to causing the disorder of touch function and liquid crystal lens function.
In addition,, may only need the liquid crystal lens function or only need touch function,, can realize the liquid crystal lens function separately or realize touch function separately by signal coupling circuit 193 controls in some specific occasions.
Compared to prior art, above-mentioned touch liquid crystal lens panel 200 only uses a panel, by configuration to electrode, liquid crystal etc., can realize two kinds of functions of liquid crystal lens and multiple point touching, simplified the structure of product, reduced the thickness of product, adopted above-mentioned touch liquid crystal lens panel electronic installation more frivolous thereby make; Simultaneously,, avoided touching the interference between drive signal and the liquid crystal lens drive signal like this, helped to keep the stability of touch liquid crystal lens panel owing to realize that the electric voltage frequency of the drive signal of liquid crystal lens and touch control function can be different with amplitude.
See also Fig. 7, the present invention also provides a kind of computer system of using touch liquid crystal lens panel.Computer system 200 comprises 3 d display device 21, camera 22, head tracking circuit 23, image processing circuit 24, general processor 25 and touch LCD lens drive circuit 190.3 d display device 21 comprises display panel 210 and is arranged on the touch LCD lens panel 100 of display panel 210 display surfaces.Liquid crystal lens driving circuit 190 can comprise liquid crystal lens driving circuit 191, touch driving circuit 192, signal coupling circuit 193 and touch signal separation circuit 194.The principle of work of touch LCD lens panel 100 and liquid crystal lens driving circuit 190 is as indicated above, repeats no more herein.
The following specifically describes the principle of work of computer system 200:
Display panel 210 can be for display panels, Plasmia indicating panel, organic electroluminescence display panel etc., and is unrestricted herein, the operation that it is used to be configured to execute instruction and execution is relevant with computer system.Liquid crystal lens driving circuit 190 is used to separate a plurality of images with parallax that display panel 210 shows and enters user's specific field of view such as right and left eyes, thereby makes user's right and left eyes receive different anaglyphs, produces stereoscopic vision.
Camera 22 is arranged on the display panel 210, be used to gather user's head image information and send user's head image information to head and follow the trail of circuit 23, head is followed the trail of circuit 23 and is judged that according to user's head image information the user is current relatively and the viewing location of display panel 210, and user position information is transferred to image processing circuit 24 and liquid crystal lens driving circuit 190.Image processing circuit 24 except can under general case, provide image data to display panel 210, can also adjust stereo image information according to customer location, for example adjusting pixel arrangement, image depth, the solid of stereo-picture plays up etc., simultaneously in order to cooperate the adjustment of stereo-picture, liquid crystal lens driving circuit 190 also can be adjusted the optical parametric of liquid crystal lens according to customer location, as the focal length of lenticulation, pitch etc., thereby make the user of current location be in the stereos copic viewing position an of the best all the time and obtain best stereos copic viewing effect.。
After touching the driving circuit 192 touch liquid crystal lens panels 100 of driving and discerning touch signal, touch signal is transferred to general processor 25 carries out respective handling.The touch action that the identification of common treatment circuit is current, and the execution computer operation relevant with touch operation as control figure image manipulation, I/O, calling program etc., are not done concrete qualification at this.
Computer system 200 has adopted panel display board 210 and touch liquid crystal lens panel 100, can be under the situation of not obvious increase device thickness and complexity, integrate three-dimensional display function and multiple point touching control function, simultaneously, the cooperation that computer system 200 is also followed the trail of circuit 23 by camera 22 and head, detect customer location in real time, and by image processing circuit 24 and liquid crystal lens driving circuit 191 adjustment display frame and liquid crystal lens, make the user be in best viewing location all the time, promoted user's vision and operating experience greatly.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (30)
1. touch liquid crystal lens panel comprises:
First electrode structure;
Second electrode structure that is oppositely arranged with first electrode structure; And
Be arranged at the liquid crystal layer between described first electrode structure and second electrode structure;
It is characterized in that described first electrode structure, liquid crystal layer, second electrode structure are configured to have the liquid crystal lens that changes the light ray propagation directive effect;
Described first electrode structure, liquid crystal layer, second electrode structure also are configured to detect at least one touch that takes place on described touch liquid crystal lens panel, and are that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel.
2. touch liquid crystal lens panel as claimed in claim 1, it is characterized in that, described first electrode structure comprises a plurality of first electrodes along first direction extension and mutual electrical isolation, described second electrode structure comprises a plurality of second electrodes along second direction extension and mutual electrical isolation, and first direction intersects at second direction.
3. touch liquid crystal lens panel as claimed in claim 2, it is characterized in that, also comprise driving circuit, described driving circuit is used to described a plurality of first electrode and described a plurality of second electrode that the liquid crystal lens drive signal is provided, touches drive signal and discerns the touch location signal that produces.
4. touch liquid crystal lens panel as claimed in claim 3, it is characterized in that, described a plurality of first electrode and described a plurality of second electrode intersect a plurality of capacitance sensing nodes of formation, described capacitance sensing node is coupled to described driving circuit, and the touch location signal is discerned in the variation that described driving circuit provides drive signal for described capacitance sensing node and detects described capacitance sensing node.
5. touch liquid crystal lens panel as claimed in claim 3 is characterized in that, the separate work of described a plurality of capacitance sensing nodes and represent diverse location on the described touch liquid crystal lens panel.
6. described touch liquid crystal lens panel as claimed in claim 3, it is characterized in that, described driving circuit comprises the liquid crystal lens driving circuit and touches driving circuit, described liquid crystal lens driving circuit provides the liquid crystal lens drive signal forming electric field between first electrode structure and second electrode structure for described first electrode structure and described second electrode structure, and the liquid crystal molecule in the described electric field driven liquid crystal layer rearranges to produce or to keep or change the liquid crystal lens effect; Described touch driving circuit provides the touch drive signal for described first electrode structure or described second electrode structure, and detects the touch location signal that described second electrode structure or described first electrode structure produce.
7. described touch liquid crystal lens panel as claimed in claim 6, it is characterized in that, described driving circuit also comprises signal coupling circuit, and described liquid crystal lens drive signal and described touch drive signal are coupled to described first electrode structure and described second electrode structure by described signal coupling circuit.
8. described touch liquid crystal lens panel as claimed in claim 6, it is characterized in that, described driving circuit also comprises the touch signal separation circuit, described touch signal separation circuit detects and separates the touch location signal of described first electrode structure or the generation of described second electrode structure, and the touch location signal is transferred to described touch driving circuit.
9. described touch liquid crystal lens panel as claimed in claim 6 is characterized in that the frequency of described liquid crystal lens drive signal is less than the frequency of described touch drive signal.
10. described touch liquid crystal lens panel as claimed in claim 6 is characterized in that, described touch drive signal the threshold voltage that deflects less than liquid crystal molecule in the described liquid crystal layer of voltage magnitude.
11. described touch liquid crystal lens panel as claimed in claim 2 is characterized in that described first electrode and described second electrode are strip electrode.
12. described touch liquid crystal lens panel as claimed in claim 2 is characterized in that the bearing of trend of described first electrode and described second electrode is vertical substantially.
13. described touch liquid crystal lens panel as claimed in claim 2 is characterized in that the bearing of trend of described first electrode and described second electrode is vertical substantially.
14. described touch liquid crystal lens panel as claimed in claim 2 is characterized in that, described a plurality of first electrodes are parallel to each other, described a plurality of second electrodes are parallel to each other.
15. described touch liquid crystal lens panel as claimed in claim 1, it is characterized in that, described touch liquid crystal lens panel comprises also and is arranged on first both alignment layers between described first electrode structure and the described liquid crystal layer and is arranged on second both alignment layers between described second electrode structure and the described liquid crystal layer that described first both alignment layers and described second both alignment layers cooperatively interact so that the liquid crystal molecule of described liquid crystal layer is arranged along the initial arrangement direction.
16. described touch liquid crystal lens panel as claimed in claim 1, it is characterized in that, described touch liquid crystal lens panel also comprises first substrate and second substrate, and described first electrode structure is arranged on described first substrate, and described second electrode structure is arranged on described second substrate.
17. the driving method of a touch liquid crystal lens panel comprises:
Dispose described touch liquid crystal lens panel, form liquid crystal lens with change light ray propagation directive effect;
Dispose described touch liquid crystal lens panel, form a plurality of drive points that independently touch;
Detect the touch signal that produces on described a plurality of touch drive point to determine the position of touch signal at described touch liquid crystal lens panel.
18. the driving method of touch liquid crystal lens panel as claimed in claim 17 is characterized in that, described touch liquid crystal lens panel is described any one the touch liquid crystal lens panel of claim 1-16.
19. the driving method of a touch liquid crystal lens panel, described touch liquid crystal lens panel comprises first electrode structure, and second electrode structure that is oppositely arranged of first electrode structure and be arranged at liquid crystal layer between described first electrode structure and second electrode structure, and described driving method comprises:
Dispose voltage between described first electrode structure and second electrode structure changing the arrangement of the liquid crystal molecule in the liquid crystal layer, thereby form liquid crystal lens;
Dispose the voltage between described first electrode structure and second electrode structure, form a plurality of touch drive points;
Detect the touch signal that produces on described a plurality of touch drive point to determine the position of described touch signal at described touch liquid crystal lens panel.
20. the driving method of touch liquid crystal lens panel as claimed in claim 19 is characterized in that, detects the touch signal process that produces on described a plurality of touch drive point and comprises that the filtering to touch signal has reduced undesired signal.
21. a 3 d display device comprises:
Display panel;
Be arranged on the touch liquid crystal lens panel on the display panel, described touch liquid crystal lens panel comprises:
First electrode structure;
Second electrode structure that is oppositely arranged with first electrode structure; And
Be arranged at the liquid crystal layer between described first electrode structure and second electrode structure;
Wherein, described first electrode structure, liquid crystal layer, second electrode structure are configured to have the liquid crystal lens that changes the light ray propagation directive effect, thereby the image with parallax that described display panel is shown transfers to the predetermined field of view direction;
Described first electrode structure, liquid crystal layer, second electrode structure also are configured to detect at least one touch that takes place on touch liquid crystal lens panel, and are that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel.
22. 3 d display device as claimed in claim 21, it is characterized in that, also comprise head tracking circuit, image processing circuit, described head is followed the trail of circuit and is used to gather user's head portrait positional information, and described image processing circuit is adjusted display image according to user's head portrait positional information.
23. 3 d display device as claimed in claim 22, it is characterized in that, described head is followed the trail of circuit and is comprised head portrait capturing apparatus and head portrait position analysis circuit, described head portrait capturing apparatus is used to absorb user's head image information, and described head portrait position analysis circuit is used for according to the position of user's head image information identification user head portrait with respect to described 3 d display device.
24. 3 d display device as claimed in claim 22, it is characterized in that, described touch liquid crystal lens panel also comprises touch liquid crystal lens driving circuit, thereby described touch liquid crystal lens driving circuit drives described touch liquid crystal lens panel makes it form liquid crystal lens, and adjusts the optical parametric of the liquid crystal lens of described touch liquid crystal lens panel formation according to user's head portrait positional information.
25. 3 d display device as claimed in claim 24, it is characterized in that, described touch liquid crystal lens driving circuit comprises the touch driving circuit, and described touch driving circuit drives described touch liquid crystal lens panel and detection and Identification and is created in touch location signal on the described touch liquid crystal lens panel.
26. 3 d display device as claimed in claim 21, it is characterized in that, described first electrode structure comprises a plurality of first electrodes along first direction extension and mutual electrical isolation, described second electrode structure comprises a plurality of second electrodes along second direction extension and mutual electrical isolation, and first direction intersects at second direction.
27. 3 d display device as claimed in claim 26 is characterized in that, described a plurality of first electrodes and described a plurality of second electrode intersect a plurality of capacitance sensing nodes of formation, discern the touch location signal by the variation that detects described a plurality of capacitance sensing nodes.
28. touch liquid crystal lens panel as claimed in claim 27 is characterized in that, the separate work of described a plurality of capacitance sensing nodes and represent diverse location on the described touch liquid crystal lens panel.
29. a computer system comprises:
Processor, the operation that it is configured to execute instruction and execution is relevant with computer system;
3 d display device, it is operatively coupled to described processor, and described 3 d display device comprises:
Display panel;
Be arranged on the touch liquid crystal lens panel on the display panel, described touch liquid crystal lens panel is configured to have the liquid crystal lens that changes the light ray propagation directive effect, thereby the image with parallax that described display panel is shown transfers to the predetermined field of view direction, described touch liquid crystal lens panel is configured also to be configured to detect at least one touch that takes place on described touch liquid crystal lens panel, and is that described touch produces the touch location signal of the described touch of expression on described touch liquid crystal lens panel;
Described processor is carried out relevant computer operation according to the touch location signal that described touch liquid crystal lens panel produces.
30. computer system as claimed in claim 29 is characterized in that, described touch liquid crystal lens panel is described any one the touch liquid crystal lens panel of claim 1-16.
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| CN 201110132565 CN102231032B (en) | 2011-05-20 | 2011-05-20 | Touch-type liquid crystal lens and driving method thereof, three-dimensional display device and computer system |
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| CN 201110132565 CN102231032B (en) | 2011-05-20 | 2011-05-20 | Touch-type liquid crystal lens and driving method thereof, three-dimensional display device and computer system |
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