CN101634920B - Display device and method for determining touch position thereon - Google Patents
Display device and method for determining touch position thereon Download PDFInfo
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- CN101634920B CN101634920B CN200910164590.0A CN200910164590A CN101634920B CN 101634920 B CN101634920 B CN 101634920B CN 200910164590 A CN200910164590 A CN 200910164590A CN 101634920 B CN101634920 B CN 101634920B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Nonlinear Science (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
An embodiment of the present invention provides a display device and a method for determining Touch position thereon, the display device includes: a first substrate; an optical layer on the first substrate, comprising a plurality of pixels for displaying an image and an array of optical sensors for detecting a contact location on the display apparatus; and a contact detector detecting whether or not the display apparatus is touched.
Description
The cross reference of related application
This application claims the U.S. Provisional Application No.61/081 submitted to U.S.Patent & Trademark Office respectively on July 17th, 2008 and on July 9th, 2009,496 and U.S. Patent application No.12/500, the right of priority of 530 and rights and interests, and the right of priority of the korean patent application No.10-2009-0017763 to submit to Korean Intellectual Property Office on March 2nd, 2009 and rights and interests, the full contents of these three applications are by reference to being incorporated in this.
Technical field
The present invention relates to and have by the display device of the function of optical sensor input information and determine the method for contact position on the display apparatus.
Background technology
Conventionally, in order to input signal is supplied computing machine, mouse or keyboard are used.And user uses telechiric device to select the specific function in Digital Television (TV).But, if the input equipment of the uncomfortable operation of user such as mouse, keyboard or telechiric device and so on, then he may have difficulty in these equipment of use.
Touch panel or touch-screen are the new-type input equipments in order to eliminate these difficulties and exploitation.Touch panel allows user by utilizing the finger of this user or straightly connecing touch display panel instead of utilize such as mouse to carry out input order signal.Therefore, to utilizing the inconvenient user of the input equipment of such as mouse or keyboard and so on, can such as his/her points the digital device that direct touch display panel uses such as computing machine and so on without difficulty simply by utilization.Touch panel can be classified according to the method for the outside input of induction.Such as, touch panel can be divided into the touch panel utilizing electrostatic capacitance, the touch panel utilizing resistive layer, utilizes the touch panel of the integral method of hyperacoustic touch panel, utilization measurement tension force, utilizes the touch panel of piezoelectric effect and utilize the touch panel of optical sensor.
Specifically, in the touch panel utilizing optical sensor, the contact undertaken by the finger of such as user is by forming optical diode in the panel and responding to by the electric current of the light generation incided on this optical diode sensed.Manufacture simply to the optical diode that this touch panel is necessary element, this is because it can be out manufactured in the process of driving circuit forming display panel, described display panel such as liquid crystal display (LCD) or Organic Light Emitting Diode (OLED).
But, utilize the conventional method of induction light, whether the object being difficult to the finger or light pen and so on determining such as user touches screen, and is difficult to the coordinate accurately calculating this object.And, the disadvantage of this conventional method is utilized to be, the induction that the shade of object may lead to errors, and whether a large amount of power may have been carried out contacting by certain objects the optical sensor sweep circuit that all works and the circuitry consumes of induced signal for reading.
Summary of the invention
The one side of the embodiment of the present invention is for a kind of display device with the function utilizing light at display information on screen, this display device can not only utilize optional equipment when need not explain catch and deny image determined whether contact, and can utilize optical sensor determine contact position.
The another aspect of the embodiment of the present invention also provides a kind of method utilizing described display device to realize low-power consumption.
The embodiment of the present invention provides a kind of display device, comprising: first substrate; Optical layers on described first substrate, this optical layers comprises for showing multiple pixel of image and the optic sensor array for detecting contact position on said display means; And detect the contact detector whether described display device be touched.
Described contact detector can comprise variable condenser, and whether this variable condenser is used for detecting described display device by capacitance measurement and is touched.
Described variable condenser can be included in the negative electrode of contact detection layer in described optical layers and described multiple pixel.
Described display device may further include the second substrate between described contact detection layer and described optical layers.
Described display device may further include the dielectric layer on described contact detection layer.
Described variable condenser can comprise: the first contact detection layer; And separate and the second parallel contact detection layer with described first contact detection layer.
Described display device may further include the dielectric layer between described first contact detection layer and described second contact detection layer.
Described display device may further include the second substrate between described first contact detection layer and described second contact detection layer.
Described display device may further include the dielectric layer between described first contact detection layer and described second contact detection layer.
Described dielectric layer can comprise the material with specific inductive capacity or the gap changed according to being applied to the pressure on described dielectric layer.
Described display device may further include the second substrate between described dielectric layer and described second contact detection layer.
Described display device may further include the second substrate between described second contact detection layer and described optical layers.
Described display device may further include the second substrate in described optical layers, and wherein said contact detector can be included on described second substrate for the touch membrane by converting electric signal at described contact position applied pressure.
The hyaline membrane that described touch membrane can comprise nesa coating or be applied by conductive material.
Described touch membrane can comprise at least one material selected from the group be made up of pet resin, polyethersulfone, poly-carbon, polyarylate, tin indium oxide, tin oxide, zinc paste, CdSnO4 and combination thereof.
Described touch membrane can be configured to utilize at least one in pressure-sensing method, resistive layer method or capacitive method to convert institute's applied pressure to described electric signal.
Described contact detector can be included in the voltage sensitive sensor being configured to change in response to institute's applied pressure resistance of the below of described first substrate.
Another embodiment of the present invention provides a kind of display device, comprise: display panel, this display panel comprises: for showing multiple pixels of image, for multiple optical sensors of inspected object contact position on said display panel, and for detecting the contact detection layer whether described display panel is touched by object; And contact position determining unit, for determining contact position on said display panel according to the signal exported by described multiple optical sensor.
Described contact detection layer can be embedded in described display panel.
Described contact detection layer can on the surface of described panel.
Described contact position determining unit can comprise contact measurement unit, and this contact measurement unit is used for receiving contact information from described contact detection layer and measuring the intensity of variation of described contact information.
Described contact information has at least one item comprised in electric capacity, specific inductive capacity, gap and resistance value.
Described contact position determining unit may further include contact determining unit, and this contact determining unit is used for, according to the intensity of variation of the contact information exported by described contact measurement unit, determining whether described display panel is touched.
Described contact determining unit can be configured to determine whether described display panel is touched by the intensity of variation of described contact information and reference value being compared.
Described contact position determining unit may further include the signal generation unit for generating the first signal or secondary signal, wherein said first signal instruction drives described multiple optical sensor and reads information from described multiple optical sensor when contact being detected, described secondary signal instruction is interrupted when contact not detected the reading from described multiple optical sensor of the driving of described multiple optical sensor and information.
Described display device may further include sensor array driver element, and this sensor array driver element is used for driving described multiple optical sensor when described first signal is received from described signal generation unit.
Described display device may further include sensor information reading unit, and this sensor information reading unit is used for receiving the signal responded to and for responded to signal is supplied to described contact position determining unit from described multiple optical sensor.
Described contact position determining unit may further include coordinate calculating unit, and the signal responded to that this coordinate calculating unit is used for according to receiving from described sensor information reading unit determines described contact position.
Another embodiment of the present invention provides a kind of method determining contact position on the display apparatus, this display device comprises display panel, sensor array driver element, sensor information reading unit and contact position determining unit, described display panel has multiple pixel, optic sensor array and contact detection layer, and described method comprises: utilize described contact detection layer inspected object contact information on said display panel; When not contacting, stop using described sensor array driver element and described sensor information reading unit; And when there being contact, enable described sensor array driver element and described sensor information reading unit to read from described multiple optical sensor the signal responded to.
Described method may further include the sweep signal according to receiving from described sensor array driver element, obtains the image of the object of the described display panel of contact.
Described method may further include the coordinate calculating the position of contact by analyzing described image.
Another embodiment of the present invention provides a kind of display device, comprising: the image-display units comprising viewing area; For determining the contact detection unit whether described display device is touched; And for determining the contact position recognition unit of the position be touched on the display region.
Accompanying drawing explanation
Drawing and description illustrate exemplary embodiment of the present invention together, and accompanying drawing and explanation one are used from elaboration principle of the present invention.
Fig. 1 is the sectional view utilizing thin layer to determine whether the panel of contact according to an embodiment of the invention;
Fig. 2 is that the thin layer that utilizes of organic light-emitting display device according to another embodiment of the present invention determines whether the perspective section view of the panel of contact;
Fig. 3 is the sectional view of a modified embodiment of panel shown in Fig. 1 according to an embodiment of the invention;
Fig. 4 is the sectional view of another modified embodiment of panel shown in Fig. 1 according to an embodiment of the invention;
Fig. 5 A, Fig. 5 B and Fig. 5 C are the sectional views of the panel utilizing thin layer to determine whether to contact according to other embodiments of the present invention;
Fig. 6 is the sectional view of panel shown in Fig. 5 A, Fig. 5 B and Fig. 5 C that improve according to the embodiment of the present invention;
Fig. 7 is the sectional view of panel shown in Fig. 5 A, Fig. 5 B and Fig. 5 C that improve according to the embodiment of the present invention;
Fig. 8 is the block diagram schematically showing the display device with the information input equipment utilizing light according to the embodiment of the present invention; And
Fig. 9 is the process flow diagram of the method for the low-power consumption for realizing the display device in Fig. 8 illustrated according to the embodiment of the present invention.
Embodiment
In the following detailed description, only certain exemplary embodiments of the present invention is shown and described simply by example.Those skilled in the art will recognize that, described embodiment can be modified in a variety of ways, and all these all do not depart from the spirit or scope of the present invention.Therefore, drawing and description should be considered to illustrative rather than restrictive in itself.In the accompanying drawings, identical Reference numeral represents identical element all the time.
Fig. 1 determines whether the sectional view of the panel of contact according to the thin layer that utilizes of the embodiment of the present invention.With reference to Fig. 1, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, contact detection layer 104 and the dielectric layer 105 with multiple optical sensor 103.
Optic sensor array layer 100 is placed on second substrate 102.In the present embodiment, optical sensor 103 is inserted between first substrate 101 and second substrate 102, and but, the present invention is not limited thereto, and multiple thin film transistor (TFT) and various display device also can be inserted between first substrate 101 and second substrate 102.First substrate 101 and second substrate 102 can be formed by glass, metal or plastics.Although do not illustrate in the present example, optic sensor array layer 100 can comprise formation thin film transistor (TFT) (TFT) layer, such as, form multiple electrodes of semiconductor layer and insulation course, and organic light emitting apparatus.This organic light emitting apparatus comprises pixel electrode, in the face of the counter electrode of this pixel electrode, and comprise the luminescent layer be inserted between pixel electrode (such as anode) and counter electrode (such as negative electrode).
In certain objects, such as, when pointing 107 touch panel, optical sensor 103 is by explaining that the shadow image of the finger 107 produced according to light source calculates the coordinate of the position of touch panel, by explaining that the amount of light creates binary picture, and the coordinate of the position of touch panel is explained according to this binary picture, or, by explaining that the amount of the light from external light source reflection creates binary picture, and calculate the coordinate of the position of touch panel.Optical sensor 103 can be PIN type optical diode.
Contact detection layer 104 is inserted between first substrate 101 and dielectric layer 105, and utilizes transparent lamina to be formed to increase transmitance, thus reduces the performance degradation of (or preventing) display device.And contact detection layer 104 can be embedded in display panel substrate during manufacture panel, or is additionally formed on display panel substrate.If finger 107 touches or touch panel, then contact detection layer 104 detects the capacitance variations caused by finger 107.In this case, contact detection layer 104 and panel form capacitor.In the present example, contact detection layer 104 forms capacitor with the negative electrode below first substrate 101.Herein, this negative electrode is included in organic light emitting apparatus, and this organic light emitting apparatus is included in optic sensor array layer 100.Therefore, additional electrode or layer do not need to be formed to form capacitor together with contact detection layer 104.In the present example, as mentioned above, utilize contact detection layer 104 in the display device of the function of display information on screen having, whether there is contact to determine by contacting the capacitance variations caused by detecting in contact detection layer 104, and do not need to utilize optical sensor 103 to explain the image of catching.Whether whether such as, can skip complicated image interpretation process, in this image interpretation process, edge is detected, have edge to move along the direction different from other edge and calculated, and have contact to be determined based on result of calculation.Therefore, optical sensor 103 can calculate the coordinate of the position of contact one by one, and does not need to explain the image of catching.Herein, if the capacitance detected by contact detection layer 104 is less than or greater than thresholding capacitance (such as predetermined threshold capacitance), then main frame or contact determination module are determined such as to contact with finger 107.Alternatively, when optical sensor 103 calculates the position of contact, the information relevant with the contact detected by contact detection layer 104 can be utilized to reduce the calculated amount being performed the coordinate determining the position contacted.
Utilize light in the conventional display device of the function of display information on screen having, utilize captured images edge to detect, and utilize the edge detected to determine whether this screen of object contact.That is, the direction of edge is detected, and when there being edge to move along the direction different from other edge, defines object contact screen.If define object contact screen, then by calculating the position coordinates obtaining contact along the center of gravity at the edge of different directions movement.But, according to one embodiment of present invention, utilize contact detection layer to determine whether object than according to normal image disposal route is easier, especially by finger contact screen, thus reduce the calculated amount of CPU (central processing unit) (CPU) and the load of internal memory.And, likely reduce (or preventing) mistake induction that is more incidental in conventional image analysis method, that caused by the shade of object.
Dielectric layer 105 is formed on contact detection layer 104, and reduces or prevent natural light outside from inciding on luminous display unit or optical sensor 103, or reflection comes from this natural light outside.If needed, dielectric layer 105 can be omitted.
Fig. 2 illustrates the perspective section view utilizing the contact detection layer 104 of Fig. 1 to form capacitor.With reference to Fig. 2, the contact detection layer 104 contacted with finger 107 is used as an electrode of capacitor, and the negative electrode 106 be formed in below first substrate 101 is used as another electrode of capacitor, and wherein other electrode toward each other.Therefore, contact detection layer 104 and negative electrode 106 form capacitor, and measure the capacitance variations caused by the contact of finger 107.In another embodiment of the invention, if display light-emitting device is organic light emitting apparatus, electrode/the layer added then is not needed to form capacitor together with contact detection layer 104, this is because the negative electrode 106 being included in the organic light emitting apparatus in optic sensor array layer 100 is formed on the below of first substrate 101, to cover the bottom of (such as covering completely) first substrate 101.
Fig. 3 is the sectional view of the modified embodiment according to the present invention's panel shown in Figure 1.With reference to Fig. 3, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, first contact detection layer 108, second contact detection layer 109 and the dielectric layer 105 with multiple optical sensor 103.Panel shown in Fig. 3 with the panel shown in Fig. 1 except the first contact detection layer 108 is identical except the second contact detection layer 109.Therefore identical with Fig. 1 Reference numeral represents identical element, therefore no longer repeats the description of operation to them and characteristic.The panel of Fig. 3 will be described now for these differences.
Second contact detection layer 109 is formed on first substrate 101, and the first contact detection layer 108 is formed on the second contact detection layer 109.First contact detection layer 108 and the second contact detection layer 109 form capacitor, and detect the capacitance variations caused by the contact of finger 107.As shown in Figure 3, between the first contact detection layer 108 and the second contact detection layer 109,105 ' is had living space.Space 105 ' can be filled by dielectric material (such as predetermined dielectric material).Although the present invention is described for the organic light emitting apparatus in above-described embodiment, but it is evident that for those of ordinary skills, the present invention can be applied to the panel display apparatus of other type, such as liquid crystal display (LCD) or Plasmia indicating panel (PDP), as long as they are the devices that optical sensor can be utilized to determine input information.
Fig. 4 is the sectional view of another modified embodiment according to the present invention's panel shown in Figure 1.With reference to Fig. 4, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, first contact detection layer 110, second contact detection layer 111 and the dielectric layer 105 with multiple optical sensor 103.Panel shown in Fig. 4 with the panel in Fig. 1 except the first contact detection layer 110 is identical except the second contact detection layer 111.Therefore identical with Fig. 1 Reference numeral represents identical element, therefore no longer repeats the description of operation to them and characteristic.The panel of Fig. 4 will be described now for these differences.
With reference to Fig. 4, the second contact detection layer 110 is formed on first substrate 101, and the second contact detection layer 111 is formed on the below of first substrate 101.First contact detection layer 110 and the second contact detection layer 111 form capacitor, and measure the capacitance variations caused by the contact of panel and finger.
Fig. 5 A, Fig. 5 B and Fig. 5 C are the sectional views of the panel utilizing thin layer to determine whether to contact according to other embodiments of the present invention.
In the preceding embodiment described referring to figs. 1 through Fig. 4, one or two contact detection layer is used to Detection capacitance change, and in the present example, the dielectric change between specific inductive capacity or contact detection layer is used to Detection capacitance change.Therefore, by carrying out the change in the gap between the change of Measuring Dielectric Constant or contact detection layer according to the contact institute applied pressure of finger, whether contact can be easily determined with finger, and do not need optical sensor.And, likely reduce or prevent mistake that is more incidental in normal image interpretation procedure, that caused by the shade of the thing except finger from responding to.
With similar in the preceding embodiment described referring to figs. 1 through Fig. 4, the coordinate of the position of finger contact utilizes optical sensor to calculate.
With reference to Fig. 5 A, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, first contact detection layer 112, second contact detection layer 113, dielectric 114 and the dielectric layer 105 with multiple optical sensor 103.
First contact detection layer 112 is placed on the below of first substrate 101, the second contact detection layer 113 and the first contact detection layer 112 spaced apart, this distance can be determined in advance.Space between first contact detection layer 112 and the second contact detection layer 113 is filled by dielectric 114.In the embodiments described, dielectric 114 is a kind of specific inductive capacity or gap according to putting on this pressure and the material changed.
When finger 107 touch panel, specific inductive capacity or the gap between the first contact detection layer 112 with the second contact detection layer 113 are applied to the pressure of this panel according to by contacting finger 107 and change.Therefore, by detecting the change of specific inductive capacity or the gap between the first contact detection layer 112 and the second contact detection layer 113, easily can determine whether panel is touched.
Fig. 5 B is the sectional view of the improvement example according to the panel illustrated in fig. 5 of the present invention.With reference to Fig. 5 B, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, first contact detection layer 115, second contact detection layer 116, dielectric 117 and the dielectric layer 105 with multiple optical sensor 103.Panel in panel shown in Fig. 5 B and Fig. 5 A is different in the position of the first contact detection layer 115 and the second contact detection layer 116.The Reference numeral identical with Fig. 1 with Fig. 5 A represents identical element, therefore no longer repeats the description of operation to them and characteristic.The panel of Fig. 5 B will be described now for these differences.
Second contact detection layer 116 is placed on below first substrate 101, and dielectric is applied on first substrate 101.First contact detection layer 115 is formed on dielectric 117.
When finger 107 touch panel, the specific inductive capacity of the dielectric 117 below the first contact detection layer 115 or the gap between the first contact detection layer 115 and the second contact detection layer 116 change.Therefore, by detecting the change of specific inductive capacity or the gap between the first contact detection layer 115 and the second contact detection layer 116, easily can determine whether panel is touched.
Fig. 5 C is the sectional view of another improvement example according to the panel illustrated in fig. 5 of the present invention.With reference to Fig. 5 C, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102, first contact detection layer 118, second contact detection layer 119, dielectric 120 and the dielectric layer 105 with multiple optical sensor 103.Panel in panel shown in Fig. 5 C and Fig. 5 A is different in the position of the first contact detection layer 118 and the second contact detection layer 119.The Reference numeral identical with Fig. 1 with Fig. 5 A represents identical element, therefore no longer repeats the description of operation to them and characteristic.The panel of Fig. 5 C will be described now for these differences.
Second contact detection layer 119 and the first contact detection layer 118 are formed on first substrate 101 in order successively, and the space between the first contact detection layer 118 and the second contact detection layer 119 is filled by dielectric 120.If finger 107 touch panels, then the specific inductive capacity of the dielectric 120 below the first contact detection layer 118 or the gap between the first contact detection layer 118 and the second contact detection layer 119 change.Therefore, by detecting the change of the specific inductive capacity of dielectric 120 or the gap between the first contact detection layer 118 and the second contact detection layer 119, easily can determine whether panel is touched.
Fig. 6 is the sectional view utilizing touch membrane 121 to determine the panel whether panel is touched according to another embodiment of the present invention.With reference to Fig. 6, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102 and the touch membrane 121 with multiple optical sensor 103.
Touch membrane 121 is adhered to the top surface of first substrate 101.Touch membrane 121 preferably clear conducting film, and convert finger 107 applied pressures to electric signal.Touch membrane 121 preferably has following characteristic, such as low surface resistance, high light transmittance, high-adhesiveness, smooth surface and thermotolerance.Usually, nesa coating is classified into the hyaline membrane with electric conductivity and the hyaline membrane applied by conductive material.The basement membrane of nesa coating can be formed by polyethylene terephthalate (PET), polyethersulfone (PES), poly-carbon (PC) or polyarylate (PAR).Nesa coating can be formed by tin indium oxide (ITO), tin oxide, ZnO or CdSnO4.
Utilize the determination whether touch membrane 121 counter plate is touched, can carry out according to pressure-sensing method, resistive layer method and/or capacitive method.
Fig. 7 is the sectional view of the panel utilizing voltage sensitive sensor 122 according to another embodiment of the present invention.With reference to Fig. 7, this panel comprises optic sensor array layer 100, first substrate 101, second substrate 102 and the voltage sensitive sensor 122 with multiple optical sensor 103.
Voltage sensitive sensor 122 is placed on the below of second substrate 102, converts the pressure that finger 107 touch panel produces to electric signal.Therefore, whether panel is touched by detecting this electric signal and is easily determined.The distribution of pressure measured by voltage sensitive sensor 122.If pressure is applied in the part of voltage sensitive sensor 122, then the resistance value of the pressure-sensitive conductive rubber of voltage sensitive sensor 122 reduces, therefore whether there is object, especially point 107 touch panels and determined by detecting the change of the resistance value of voltage sensitive sensor 122.
Fig. 8 is the block diagram schematically showing the display device with positional information acquisition device 850 according to the embodiment of the present invention.With reference to Fig. 8, this display device comprises the display panel 800 with multiple optical sensor 810, the contact detection layer 820 being embedded into or adhering to display panel 800, the sensor array driver element 830 sweep signal being supplied to each optical sensor 810, the sensor information reading unit 840 reading the data that each optical sensor 810 obtains and positional information acquisition device 850.Positional information acquisition device 850 comprises contact measurement unit 851, contact determining unit 852, signal generation unit 853 and coordinate calculating unit 854.
At specific object, such as during this display device of finger contact, each optical sensor 810 is all by explaining that the shadow image of the finger produced according to lamp calculates the coordinate of the position of contact, by explaining that the amount of light creates binary picture, and the coordinate of the position of contact is explained according to this binary picture, or by explaining that the amount of the light from internal light source reflection creates binary picture, and calculate the position coordinates of contact according to this binary picture.Display panel 800 comprises optical sensor 810 and is arranged in red (R) pixel at many signal line and multi-strip scanning line point place intersected with each other, green (G) pixel and blue (B) pixel.Display panel 800 is based on the picture signal display image received from external host.
Contact detection layer 820 is by detecting whether there is specific object, and especially finger contact display screen obtains contact information, and this contact information is supplied to positional information acquisition device 850.According to preceding embodiment, this contact information specified capacitance, specific inductive capacity, gap, resistance value, etc.The structure of contact detection layer 820 and position as above referring to figs. 1 through described by Fig. 7.
If determine finger contact display screen, then instruction selects the sweep signal of an optical sensor to be sent to display panel 800 by sensor array driver element 830 from optical sensor 810.
Sensor information reading unit 840 reads the signal that the optical sensor 810 selected by display panel 800 senses, and induction result is supplied to positional information acquisition device 850.
Positional information acquisition device 850 receives the signal responded to by sensor information reading unit 840, calculate the coordinate of the position of contact, and result of calculation is outputted to external host based on responded to signal.And positional information acquisition device 850 receives contact information from contact detection layer 820, and control whether operation sensor array driver element 830 and sensor information reading unit 840 based on this contact information.Particularly, if finger does not contact display screen, then the operation of positional information acquisition device 850 interrupt sensors array driver element 830 and sensor information reading unit 840, thus reduce power consumption or realize low-power consumption.Alternately, when in fact display screen is touched, the operation of sensor array driver element 830 and sensor information reading unit 840 by part instead of can be interrupted completely, and they can be operated at high speed.
Contact measurement unit 851 receives contact information from contact detection layer 820, and measures the intensity of variation of this contact information.Contact information specified capacitance, specific inductive capacity, gap, resistance value, etc.Contact measurement unit 851 measures the intensity of variation of the contact information caused by the contact pointed, i.e. the intensity of variation of electric capacity, specific inductive capacity, gap, resistance value etc.
Contact determining unit 852 receives the intensity of variation of contact information from contact measurement unit 851, and the intensity of variation of this contact information and reference value (can be predetermined reference value) is compared, thus determines whether display screen is touched.This reference value is provided from external host, is then stored.According to the preceding embodiment described by reference Fig. 1, the capacitance recorded by contact measurement unit 851 with special speed increase to be greater than reference capacitance value (can be predetermined reference capacitance value) time, contact determining unit 852 determine that display screen is touched.Particularly, if determine that display screen is not touched, then contact determining unit 852 control signal generation unit 853 and generate a signal, the operation of this signal instruction interrupt sensors array driver element 830 and sensor information reading unit 840.Herein, this signal can be that logic low or logic are high.
Signal generation unit 853 is under the control of contact determining unit 852, generate and export the signal being used for operation sensor array driver element 830 and sensor information reading unit 840, or the signal of operation for interrupt sensors array driver element 830 and sensor information reading unit 840.If display screen is not touched, operation then for the internal circuit calculating contact position is interrupted, namely from optical sensor 810, select the sensor array driver element 830 of an optical sensor and the operation of sensor information reading unit 840 to be interrupted, thus reduce power consumption or realize low-power consumption.And, likely reduce or prevent mistake that is more contingent in conventional image analysis method, that caused by the shade of the thing except finger from responding to.
Fig. 9 is according to the power consumption of the display device for reducing Fig. 8 of the embodiment of the present invention or the method realizing its low-power consumption.With reference to Fig. 9, in operation 900, utilize contact detection layer to detect contact information, this contact information indicates whether there is concrete object, especially this display device of finger contact.In operation 902, this contact information is utilized to determine whether contact.If define contact in operation 902, then in operation 904, connect sensor array driver element and sensor information reading unit.In operation 906, according to the sweep signal received from sensor array driver element, optical sensor is utilized to obtain the image of object, the image especially pointed.In operation 908, according to the read output signal reading images received from sensor information reading unit.In operation 910, calculate the coordinate of the position of contact by analyzing the image read.
Otherwise, if determine not contact in operation 902, then in operation 912, cut off sensor array driver element and sensor information reading unit.Therefore, when display device reality is not touched, all circuit with sensor are cut off, thus reduce power consumption or realize low-power consumption.Alternatively, by only cutting off some operation of sensor array driver element or sensor information reading unit, them are made when display device is really contacted with high speed operation, can to realize low-power consumption.And, although likely reduce or prevent object reality from not contacting this display device, make display device be erroneously determined to by object contact due to the shade of object.
Can by utilizing additional contact detection layer when not needing easily to have determined whether this display device of object contact when utilizing optical sensor to explain the image of catching according to the display device of the embodiment of the present invention.
And this display device can realize low-power consumption, and reduce or prevent the mistake caused by the shade of object from responding to.
Although the present invention is described in conjunction with certain exemplary embodiments, but it should be understood that, the present invention is not limited to the disclosed embodiments, but on the contrary, the invention is intended to contain various amendment and the equivalent arrangements of the spirit and scope being included in appended claims and equivalent thereof.
Claims (25)
1. a display device, comprising:
First substrate;
Optical layers on described first substrate, this optical layers comprises for showing multiple pixel of image and the optic sensor array for detecting contact position on said display means;
The image not needing to utilize optical sensor to explain and catch and detect the contact detector whether described display device be touched; And
Second substrate between contact detection layer and described optical layers,
Wherein said contact detector comprises variable condenser, and whether this variable condenser is used for detecting described display device by capacitance measurement and is touched,
Wherein said variable condenser is included in the negative electrode of described contact detection layer in described optical layers and described multiple pixel,
Wherein said contact detection layer is positioned at the transparent membrane on the whole surface of described second substrate, and wherein when described contact detector detects that described display device is touched, described optic sensor array is by the contact position selecting to detect on said display means.
2. display device according to claim 1, is included in the dielectric layer on described contact detection layer further.
3. a display device, comprising:
First substrate;
Second substrate;
Optical layers between described first substrate and described second substrate, this optical layers comprises for showing multiple pixel of image and the optic sensor array for detecting contact position on said display means; And
The image not needing to utilize optical sensor to explain and catch and detect the contact detector whether described display device be touched,
Wherein said contact detector comprises variable condenser, and whether this variable condenser is used for detecting described display device by capacitance measurement and is touched,
Wherein said variable condenser comprises:
First contact detection layer; And
Separate and the second parallel contact detection layer with described first contact detection layer,
Wherein said first contact detection layer and described second contact detection layer are positioned at the transparent membrane on the whole surface of described first substrate, and
Wherein when described contact detector detects that described display device is touched, described optic sensor array is by the contact position selecting to detect on said display means.
4. display device according to claim 3, is included in the dielectric layer between described first contact detection layer and described second contact detection layer further.
5. display device according to claim 3, wherein said second substrate is between described first contact detection layer and described second contact detection layer.
6. display device according to claim 4, wherein said dielectric layer comprises the material had according to the pressure and the specific inductive capacity that changes or gap being applied to described dielectric layer.
7. display device according to claim 6, wherein said second substrate is between described dielectric layer and described second contact detection layer.
8. display device according to claim 4, wherein said second substrate is between described second contact detection layer and described optical layers.
9. a display device, comprising:
First substrate;
Optical layers on described first substrate, this optical layers comprises for showing multiple pixel of image and the optic sensor array for detecting contact position on said display means; And
The image not needing to utilize optical sensor to explain and catch and detect the contact detector whether described display device be touched,
Described display device is included in the second substrate in described optical layers further, and
Wherein said contact detector be included on described second substrate for the touch membrane by converting electric signal at described contact position applied pressure, and
Wherein when described contact detector detects that described display device is touched, described optic sensor array is by the contact position selecting to detect on said display means.
10. display device according to claim 9, the hyaline membrane that wherein said touch membrane comprises nesa coating or applied by conductive material.
11. display device according to claim 9, wherein said touch membrane comprises at least one material selected from the group be made up of pet resin, polyethersulfone, poly-carbon, multi arylate, tin indium oxide, tin oxide, zinc paste, CdSnO4 and combination thereof.
12. display device according to claim 9, wherein said touch membrane is configured to utilize at least one in pressure-sensing method, resistive layer method or capacitive method to convert institute's applied pressure to described electric signal.
13. 1 kinds of display device, comprising:
First substrate;
Optical layers on described first substrate, this optical layers comprises for showing multiple pixel of image and the optic sensor array for detecting contact position on said display means;
The image not needing to utilize optical sensor to explain and catch and detect the contact detector whether described display device be touched; And
Second substrate in described optical layers,
Wherein said contact detector is included in the voltage sensitive sensor being configured to change in response to institute's applied pressure resistance of the below of described first substrate, and
Wherein when described contact detector detects that described display device is touched, described optic sensor array is by the contact position selecting to detect on said display means.
14. 1 kinds of display device, comprising:
Display panel, comprising:
Multiple pixels of display image;
For multiple optical sensors of inspected object contact position on said display panel; And
The image not needing to utilize described optical sensor to explain and catch and for detecting the contact detection layer whether described display panel is touched; And
Contact position determining unit, for the touch testing result based on described contact detection layer, according to the contact position that the signal exported by described multiple optical sensor is determined on said display panel,
Wherein said contact position is that the signal only exported based on described multiple optical sensor is determined,
Wherein said contact detection layer is positioned at the transparent membrane on the whole surface of described display panel, and
Wherein when described contact detection layer detects that described display panel is touched, described multiple optical sensor is by the contact position selecting to detect on described display panel.
15. display device according to claim 14, wherein said contact position determining unit comprises contact measurement unit, and this contact measurement unit is used for receiving contact information from described contact detection layer and measuring the intensity of variation of described contact information.
16. display device according to claim 15, wherein said contact information comprises at least one item in electric capacity, specific inductive capacity, gap and resistance value.
17. display device according to claim 15, wherein said contact position determining unit comprises contact determining unit further, and this contact determining unit is used for determining whether described display panel is touched according to the intensity of variation of the contact information exported by described contact measurement unit.
18. display device according to claim 17, wherein said contact determining unit is configured to determine whether described display panel is touched by the intensity of variation of described contact information and reference value being compared.
19. display device according to claim 17, wherein said contact position determining unit comprises the signal generation unit for generating the first signal or secondary signal further, wherein said first signal instruction drives described multiple optical sensor and reads information from described multiple optical sensor when contact being detected, described secondary signal instruction is interrupted when contact not detected the reading from described multiple optical sensor of the driving of described multiple optical sensor and information.
20. display device according to claim 19, comprise sensor array driver element further, and this sensor array driver element is used for driving described multiple optical sensor when described first signal is received from described signal generation unit.
21. display device according to claim 19, comprise sensor information reading unit further, this sensor information reading unit is used for receiving from described multiple optical sensor the signal responded to, and for responded to signal is supplied to described contact position determining unit.
22. display device according to claim 21, wherein said contact position determining unit comprises coordinate calculating unit further, and the signal responded to that this coordinate calculating unit is used for according to receiving from described sensor information reading unit determines described contact position.
23. 1 kinds of methods determining contact position on the display apparatus, this display device comprises display panel, sensor array driver element, sensor information reading unit and contact position determining unit, described display panel has multiple pixel, optic sensor array and contact detection layer, and described method comprises:
Whether the image not needing to utilize optical sensor to explain and catch and utilize described contact detection layer inspected object contact information on said display panel, be touched to detect described display panel;
When not contacting, described sensor array driver element of stopping using is not to select described optic sensor array and described sensor information reading unit of stopping using; And
When there being contact, enable described sensor array driver element to select described optic sensor array and to enable described sensor information reading unit to read the signal responded to from multiple optical sensor, and
Wherein said contact position is that the signal only exported based on described multiple optical sensor is determined,
Wherein said contact detection layer is positioned at the transparent membrane on the whole surface of described display panel.
24. methods according to claim 23, comprise the image of the object obtaining the described display panel of contact according to the sweep signal received from described sensor array driver element further.
25. methods according to claim 24, comprise the coordinate calculating the position of contact by analyzing described image further.
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| US61/081,496 | 2008-07-17 | ||
| KR1020090017763 | 2009-03-02 | ||
| KR1020090017763A KR101137383B1 (en) | 2008-07-17 | 2009-03-02 | Display apparatus |
| KR10-2009-0017763 | 2009-03-02 | ||
| US12/500,530 US8760431B2 (en) | 2008-07-17 | 2009-07-09 | Display apparatus |
| US12/500,530 | 2009-07-09 |
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| CN101634920A CN101634920A (en) | 2010-01-27 |
| CN101634920B true CN101634920B (en) | 2015-05-13 |
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| CN104298405B (en) * | 2013-07-19 | 2017-07-28 | 中强光电股份有限公司 | Touch-control module, optical projection system and its touch control method |
| CN108415634B (en) * | 2013-08-30 | 2020-12-15 | 烟台正海科技股份有限公司 | Touch device |
| CN104750314B (en) * | 2015-04-16 | 2017-12-05 | 施政 | Object space detection method, microprocessor and detection system |
| CN106201087B (en) * | 2016-07-13 | 2019-07-16 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN107515695B (en) * | 2017-08-31 | 2020-07-10 | 河源中光电通讯技术有限公司 | Pressure-sensitive display screen touch unit, touch screen and manufacturing method of touch screen |
| CN107797710A (en) * | 2017-11-21 | 2018-03-13 | 四川长虹教育科技有限公司 | A kind of Infrared touch screen systems |
| CN113654459B (en) * | 2021-07-22 | 2024-05-24 | 北京小米移动软件有限公司 | Method, device and storage medium for determining position of under-screen photosensitive sensor |
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| CN1945387A (en) * | 2005-09-21 | 2007-04-11 | 三星电子株式会社 | Touch sensitive display device and driving apparatus and method thereof |
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| JPH096525A (en) * | 1995-06-16 | 1997-01-10 | Fuji Electric Co Ltd | Position input device and picture display device connected to the input device |
| GB0401991D0 (en) * | 2004-01-30 | 2004-03-03 | Ford Global Tech Llc | Touch screens |
| KR101018751B1 (en) * | 2004-09-24 | 2011-03-04 | 삼성전자주식회사 | Display device and driving method thereof |
| KR101068599B1 (en) * | 2008-03-27 | 2011-09-30 | 리서치 인 모션 리미티드 | Touch screen display for electronic device and method of determining touch interaction therewith |
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| CN1945387A (en) * | 2005-09-21 | 2007-04-11 | 三星电子株式会社 | Touch sensitive display device and driving apparatus and method thereof |
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| KR20100009465A (en) | 2010-01-27 |
| CN101634920A (en) | 2010-01-27 |
| KR101137383B1 (en) | 2012-04-26 |
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