CN209044631U

CN209044631U - Photosensitive device, photosensitive mould group, display module and electronic equipment

Info

Publication number: CN209044631U
Application number: CN201790000328.0U
Authority: CN
Inventors: 李问杰
Original assignee: Shenzhen Sunwave Technology Co Ltd
Current assignee: Liuzhou Zibo Technology Co.,Ltd.
Priority date: 2017-12-30
Filing date: 2017-12-30
Publication date: 2019-06-28
Anticipated expiration: 2027-12-30
Also published as: WO2019127581A1

Abstract

The utility model discloses a kind of photosensitive device, photosensitive mould group, display module and electronic equipment.The photosensitive device includes the multiple photosensitive pixels of a substrate and setting on the substrate, and the photosensitive pixel includes sensing unit and signal output unit；Wherein, the sensing unit, when receiving light sensing control signal, executes light sensing, and generate corresponding photoreceptor signal for receiving light sensing control signal；For receiving output control signal, and when receiving the output control signal, the photoreceptor signal that the sensing unit is generated exports the signal output unit.The photosensitive mould group, display module and electronic equipment include the photosensitive device.

Description

Photosensitive device, photosensitive mould group, display module and electronic equipment

Technical field

The utility model relates to a kind of photosensitive device, photosensitive mould group, display module and electronics for sensing biological information Equipment.

Background technique

Currently, fingerprint recognition, has been increasingly becoming the standard configuration component of the electronic products such as mobile terminal.Since optical fingerprint is known Other specific capacitance formula fingerprint recognition has stronger penetration capacity, therefore it is following that optical fingerprint identification, which is applied to mobile terminal, Development trend.So, still have much room for improvement applied to the existing optical fingerprint identification structure of mobile terminal.

Utility model content

The utility model embodiment aims to solve at least one of the technical problems existing in the prior art.For this purpose, this reality Need to provide a kind of photosensitive device, photosensitive mould group, display module and electronic equipment with novel embodiment.

A kind of photosensitive device of the utility model embodiment, including a substrate and setting on the substrate multiple Photosensitive pixel, the photosensitive pixel include sensing unit and signal output unit；Wherein,

The sensing unit, when receiving light sensing control signal, executes light sensation for receiving light sensing control signal It surveys, and generates corresponding photoreceptor signal；

The signal output unit controls signal for receiving output, and when receiving the output control signal, will The photoreceptor signal output that the sensing unit generates.

In the photosensitive device of the utility model, control whether that the photosensitive unit is driven to execute light sensation by switch unit It surveys, photosensitive unit is controlled in the output for executing the electric signal that light sensing generates by signal output unit, is so not only realized The independent control of photosensitive unit, and the electric signal for also achieving photosensitive unit generation exports in time, effectively, to improve The sensing precision of photosensitive device.

In some embodiments, the light sensing control signal includes the first scanning drive signal, the sensing unit Including switch unit and photosensitive unit；Wherein,

The switch unit is swept for receiving a reference signal and first scanning drive signal receiving first When retouching driving signal, by the reference signal transmission to the photosensitive unit；

The photosensitive unit is used to receive the reference signal that the switch unit transmits, and after the first predetermined time Start to execute light sensing, generates corresponding photoreceptor signal.

In some embodiments, the photosensitive unit includes an at least sensor devices, and the sensor devices include the One electrode, the reference signal transmitted for receiving the switch unit.

In some embodiments, the sensor devices are photodiode, and the cathode of the photodiode is institute The first electrode for stating sensor devices, the reference signal transmitted for receiving the switch unit, the photodiode Anode connects a prearranged signals.

In some embodiments, the photosensitive unit further comprises a first capacitor, and the of the first capacitor For receiving the reference signal that the switch unit transmits, the second pole plate of the first capacitor connects predetermined one pole plate Signal, and the first capacitor forms discharge loop with the sensor devices when executing light sensing.

The utility model embodiment increases the capacitance of entire photosensitive unit by setting first capacitor, thus The velocity of discharge of photodiode is reduced, so that the read access time of the voltage signal on photodiode cathode is more sufficient, To improve the sensing precision of target object.

In some embodiments, the first capacitor is variable capacitance or the first capacitor is by multiple capacitors The capacitor array of composition.Since first capacitor is set as variable capacitance, is adjusted, can be adjusted by the capacity of the first capacitor The sensitive time of whole photosensitive pixel, to adapt to the variation of environment light, to obtain accurate photoreceptor signal.

In some embodiments, the switch unit includes a first transistor, and the first transistor includes the One coordination electrode, the first transmission electrode and the second transmission electrode；Wherein, first coordination electrode is swept for receiving described first Driving signal is retouched, first transmission electrode is for receiving the reference signal, second transmission electrode and the photoreceptor The first electrode of part connects；The first transistor conducting when receiving first scanning drive signal, by the reference Signal is transmitted to the first electrode of the sensor devices.

In some embodiments, the signal output unit includes a second transistor and buffer circuit；The buffering It is electrically connected between the second transistor and the sensing unit, is generated when for the sensing unit to be executed light sensing Electric signal buffered；The second transistor includes the second coordination electrode, third transmission electrode and the 4th transmission electrode, In the second coordination electrode for receiving output control signal, the third transmission electrode is used to connect buffer circuit, described Second transistor conducting when receiving output control signal, the electric signal of buffering is exported by the 4th transmission electrode；Its In, the high level signal in the output control signal continued for the second predetermined time.

In the utility model embodiment, buffer circuit plays the role of buffering isolation, and photosensitive unit is executed light sensing The electric signal of generation is isolated, and other circuit loads is avoided to influence the sensing signal of photosensitive unit, to obtain accurate Light sensing signal.

In some embodiments, the buffer circuit includes a third transistor, and the third transistor includes the Three coordination electrodes, the 5th transmission electrode, the 6th transmission electrode；Wherein, the third coordination electrode is for connecting the photoreceptor Part, the 5th transmission electrode is for receiving a voltage signal, the third of the 6th transmission electrode and the second transistor Transmission electrode connection.

In some embodiments, the light signal strength that second predetermined time receives according to the sensing unit is dynamic State adjustment.

In some embodiments, the intensity of the optical signal received is bigger, and the second predetermined time is shorter；It is described to connect The intensity of the optical signal received is smaller, and the second predetermined time is longer.

In some embodiments, the switch unit is further used for, and executes light sensing in the photosensitive unit and holds Terminate light sensing after a continuous predetermined time, and latched to the photoreceptor signal that light sensing generates is executed, so that signal output is single When member receives the output control signal, the photoreceptor signal of the latch is exported.

In the utility model embodiment, switch unit is used not only for driving photosensitive unit and executes light sensing, but also controls Photosensitive unit processed terminates light sensing, and photosensitive unit is executed the electric signal that light sensing generates and is latched, therefore in difference Capable photosensitive pixel can be performed simultaneously light sensing or even all photosensitive pixels are performed simultaneously light sensing, to give photoreceptor signal Output control provide time enough and flexibility.

In some embodiments, the light sensing control signal further comprises the second scanning drive signal, described to open Closing unit further comprises the 4th transistor, and the 4th transistor includes the 4th coordination electrode, the 7th transmission electrode, the 8th transmission Electrode, the 4th coordination electrode for receiving second scanning drive signal, the 7th transmission electrode with it is described photosensitive The first electrode of device connects, and the 8th transmission electrode is connect with the first pole plate of the first capacitor；And described first First pole plate of capacitor is connect with the signal transmission unit；Wherein the high level signal in the second scanning drive signal continues Three predetermined times, the third predetermined time were greater than for the first predetermined time.

In some embodiments, the first capacitor is used to hold when the photosensitive unit terminates to execute light sensing The photoreceptor signal generated when row light sensing is latched.

When first capacitor is used not only for executing light sensing in the utility model embodiment, discharge back with sensor devices formation Road, but also when terminating light sensing, the electric signal that light sensing generates will be executed and latched.In this way, the utility model is implemented The photosensitive pixel structure of mode is simple, and occupies little space.

In some embodiments, the sensing unit of the multiple photosensitive pixel is performed simultaneously light sensing.

In some embodiments, the substrate is silicon base, metallic substrates, printed circuit board or dielectric base.

In some embodiments, the scanning being electrically connected respectively with the multiple photosensitive pixel is additionally provided in the substrate Line group, data line group and signal reference line group.

In some embodiments, the photosensitive device further comprises that corresponding and scanline groups and signal reference line group connect The photosensitive driving unit connect, and the signal processing unit being connect with data line group；The photosensitive driving unit is for driving institute It states multiple photosensitive pixels and executes light sensing, and control the multiple photosensitive pixel and execute the electric signal output generated when light sensing； The electric signal that the signal processing unit is used to export the multiple photosensitive pixel is read out, and according to the electric signal of reading Obtain the predetermined biological information in contact with or close to the target object above the photosensitive device.

In some embodiments, the photosensitive driving unit setting on the substrate, or by connector with it is described Scanline groups and signal reference line group are electrically connected；The signal processing unit setting on the substrate, or passes through connector It is electrically connected with the data line group.

In some embodiments, the photosensitive device is a sensitive chip.

In some embodiments, the photosensitive device is for sensing finger print information.

A kind of photosensitive mould group of the utility model embodiment, the photosensitive device including above-mentioned any one embodiment.

In some embodiments, photosensitive device includes a photosensitive panel, and the photosensitive panel includes substrate and sets Set multiple photosensitive pixels on the substrate；The photosensitive mould group further comprises anti-aliasing image-forming component, and described anti-mixed Element is built up to be set on the photosensitive panel.

In some embodiments, the photosensitive mould group further comprises filter coating, and the filter coating is set to described resist Side of the aliasing image-forming component far from the photosensitive panel, or be set to the photosensitive panel and the anti-aliasing image-forming component it Between.

In some embodiments, the photosensitive device includes a photosensitive panel, and the photosensitive panel include substrate with And the multiple photosensitive pixels of setting on the substrate；The photosensitive mould group further comprises filter coating, and the filter coating is set In on the photosensitive panel.

In some embodiments, the photosensitive mould group is a biology sensing chip.

A kind of display module of the utility model embodiment, including above-mentioned photosensitive mould group, and photosensitive mould group is located at display Below device.

Another display module of the utility model embodiment, including above-mentioned photosensitive mould group, and the photosensitive mould group position Below the display device；The display device includes a display panel, and the display panel has display area；It is described Photosensitive panel in photosensitive mould group is used to execute the life of the target object of any position in the display area to the display panel Object characteristic information sensing；Alternatively, the photosensitive panel in the photosensitive mould group has sensing region, and the shape of the sensing region Consistent with the shape of the display area, the size of the sensing region is greater than or equal to the size of the display area.

The a kind of electronic equipment of the utility model embodiment, the photosensitive device including any of the above-described embodiment.

Since the electronic equipment includes the photosensitive device of any of the above-described embodiment, which has above-mentioned sense The institute that electro-optical device has is effective.

The additional aspect and advantage of the utility model embodiment will be set forth in part in the description, partially will be under Become obvious in the description in face, or is recognized by the practice of the utility model embodiment.

Detailed description of the invention

The above-mentioned and/or additional aspect and advantage of the utility model embodiment are from combination following accompanying drawings to embodiment Description in will be apparent and be readily appreciated that, in which:

Fig. 1 is the array distribution schematic diagram of photosensitive pixel in the photosensitive device of one embodiment of the utility model；

Fig. 2 is the electrical block diagram of one embodiment of photosensitive pixel shown in FIG. 1；

Fig. 3 is signal timing diagram of the photosensitive pixel shown in Fig. 2 when executing light sensing, at each node；

Fig. 4 is in the photosensitive device of one embodiment of the utility model, and photosensitive pixel and scan line, data line and signal are joined Examine the connection relationship structure between line, and the photosensitive pixel be Fig. 2 shows photosensitive pixel structure；

Fig. 5 is the structural block diagram of one embodiment of photosensitive driving unit shown in Fig. 4；

Fig. 6 is the electrical block diagram of another embodiment of photosensitive pixel shown in FIG. 1；

Fig. 7 is signal timing diagram of the photosensitive pixel shown in fig. 6 when executing light sensing, at each node；

Fig. 8 is photosensitive pixel and scan line, data line and signal in the photosensitive device of another embodiment of the utility model Connection structure between reference line, and the photosensitive pixel is the photosensitive pixel structure shown in Fig. 6；

Fig. 9 is the structural block diagram of one embodiment of photosensitive driving unit shown in Fig. 8；

Figure 10 is the structural schematic diagram of photosensitive panel in the photosensitive device of one embodiment of the utility model；

Figure 11 is the partial structural diagram of the photosensitive mould group of one embodiment of the utility model；

Figure 12 is the optical signal schematic diagram that anti-aliasing image-forming component can pass through in photosensitive mould group shown in Figure 11；

Figure 13 is the partial structural diagram of the anti-aliasing image-forming component of one embodiment of the utility model；

Figure 14 is the partial structural diagram of the anti-aliasing image-forming component of another embodiment of the utility model；

Figure 15 is the preparation process schematic diagram of anti-aliasing image-forming component shown in Figure 14；

Figure 16 is the partial structural diagram of the anti-aliasing image-forming component of the another embodiment of the utility model；

Figure 17 is the partial structural diagram of the photosensitive mould group of another embodiment of the utility model；

Figure 18 is the partial structural diagram of the display module of one embodiment of the utility model；

Figure 19 is the partial structural diagram of one embodiment of display panel shown in Figure 18；

Figure 20 is the display area of the display panel of one embodiment of the utility model and the sensing region of photosensitive panel Corresponding position schematic diagram；

Figure 21 is the structural schematic diagram of electronic equipment applied by the photosensitive mould group of one embodiment of the utility model；

Figure 22 is diagrammatic cross-section of the electronic equipment shown in Figure 21 along an embodiment of I-I line, and Figure 22 is shown The part-structure of electronic equipment；

Figure 23 is diagrammatic cross-section of the electronic equipment shown in Figure 21 along another embodiment of I-I line, and Figure 23 is shown The part-structure of electronic equipment.

Specific embodiment

The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and should not be understood as practical to this Novel limitation.

In the description of the present invention, it should be understood that term " first ", " second " are used for description purposes only, and It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result, The feature of " first ", " second " can explicitly or implicitly include one or more feature.In the utility model Description in, the meaning of " plurality " is two or more, unless otherwise specifically defined." contact " or " touch " packet Include directly contact or mediate contact.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected or can be in communication with each other；It can be directly connected, it can also be in Between medium be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For this field For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model. In order to simplify the disclosure of the utility model, hereinafter to the component of specific examples and being set for describing.Certainly, they are only Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments And/or the relationship between setting.In addition, the example of various specific techniques and material that the utility model provides, but this Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.

Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner In formula.In the following description, many details are provided to provide and fully understand to the embodiments of the present invention. However, one of ordinary skill in the art would recognize that, without one or more in the specific detail, or using other knots Structure, constituent element etc. can also practice the technical solution of the utility model.In other cases, it is not shown in detail or describes known knot Structure or operation are to avoid fuzzy the utility model.

The utility model embodiment proposes a kind of photosensitive device being set in electronic equipment, is especially set to electronics and sets Below standby display screen.The display screen, which is such as, but not limited to OLED display panel etc., has the display device for issuing optical signal.Electricity When sub- equipment works, display screen issues optical signal, is shown with executing corresponding image.At this point, if thering is target object to contact or touch The electronic equipment is touched, the optical signal that display screen issues reflects after reaching target object, and reflected optical signal passes through aobvious It is received after display screen by photosensitive device, the optical signal received is converted to electric signal corresponding with optical signal by photosensitive device, with root According to the electric signal that the photosensitive device generates, the predetermined biological information of target object is formed.

The biological information of above-mentioned target object is such as, but not limited to the skins lines such as fingerprint, palmmprint, ear line, sole letter The other biologicals characteristic information such as breath and heart rate, blood oxygen concentration, vein.Target object is such as, but not limited to human body, or The object of other suitable types.

In some embodiments, which also can be set the light source for biological information sensing.When this When electronic equipment executes biological information sensing, which issues corresponding optical signal, such as infrared light, to realize to mesh Mark the sensing of the information such as heart rate, blood oxygen concentration, the vein of object.

Electronic equipment for example but is not limited to consumer electrical product, household formula electronic product, vehicular electronic product, gold Melt the electronic product of the suitable types such as end product.Wherein, consumer electrical product for example mobile phone, tablet computer, notebook electricity Brain, tabletop display, computer all-in-one machine etc..Household formula electronic product for example intelligent door lock, TV, refrigerator, wearable device etc.. Vehicular electronic product for example automatic navigator, vehicle-carrying DVD etc..Financial terminal product for example ATM machine, self-service transacting business end End etc..

Fig. 1 is please referred to, Fig. 1 shows the array distribution structure of photosensitive pixel in a photosensitive device, the photosensitive device 20 packet Multiple photosensitive pixels 22 are included, multiple photosensitive pixel 22 carries out array distribution by linescan method, to form photosensitive array 201.Tool Body, which includes multirow photosensitive pixel and multiple row photosensitive pixel, and every row photosensitive pixel is spaced apart in X direction, Each column photosensitive pixel is spaced apart along Y-direction.When photosensitive device 20 carries out image sensing, can be driven line by line from X-direction Each row photosensitive pixel 22 executes light sensing, then reads from Y-direction the electric signal that each photosensitive pixel 22 executes light sensing and generates. Certainly, each photosensitive pixel 22 for forming photosensitive array 201 is not limited to vertical relation shown in fig. 1, and in addition or other are advised Then mode is distributed or non-regular is distributed.

In some embodiments, each photosensitive pixel 22 includes sensing unit and signal output unit.Wherein, described Sensing unit, when receiving light sensing control signal, executes light sensing for receiving light sensing control signal.Executing light sensation When survey, the sensing unit receives optical signal, and the optical signal received is converted to corresponding photoreceptor signal, i.e. electric signal； The signal output unit controls signal for receiving output, and when receiving the output control signal, by the sensing Unit executes the photoreceptor signal output generated when light sensing.

Specifically, referring to Fig. 2, Fig. 2 shows a kind of circuit structures of a photosensitive pixel 22 in Fig. 1.Therefore, this is photosensitive Pixel 22 is alternatively referred to as photosensitive circuit.A photosensitive pixel 22 in the utility model embodiment has first input end In1, the Two input terminal In2, third input terminal In3 and one first output end Out1.It includes the first turntable driving that light sensing, which controls signal, Signal.Photosensitive pixel 22 includes sensing unit and signal output unit 223, and sensing unit includes switch unit 221 and photosensitive again Unit 222, photosensitive unit 222 are connected between switch unit 221 and signal output unit 223.Switch unit 221 passes through third Input terminal In3 receives a reference signal Vref, in addition, switch unit 221 also receives one first scanning by first input end In1 Driving signal, and reference signal Vref is transmitted to photosensitive unit 222 when receiving the first scanning drive signal, to drive sense Light unit 222 works.Photosensitive unit 222 turns the optical signal received for receiving optical signal, and when receiving optical signal It is changed to corresponding electric signal.Signal output unit 223 receives output control signal by the second input terminal In2, and according to output The electric signal that control signal generates photosensitive unit 222 is exported from the first output end Out1.

Optionally, above-mentioned first scanning drive signal and output control signal are a pulse signal, and the first scanning is driven The duration of high level was the first predetermined time in dynamic signal, and the duration of high level is second pre- in output control signal It fixes time.

In some embodiments, photosensitive unit 222 includes an at least sensor devices, which includes one first electricity Pole and second electrode, first electrode is for receiving the reference signal Vref that switch unit 221 transmits, and second electrode is for connecing Receive a fixed telecommunication number.It is applied to two electrodes of sensor devices by reference to signal Vref and fixed telecommunication number, forms driving sense The driving voltage of optical device.The sensor devices are such as, but not limited to photodiode D1, change ground, which can be with For light resistance, phototriode, thin film transistor (TFT) etc..It should be noted that the quantity of sensor devices may be 2,3 Etc..By taking photodiode D1 as an example, photodiode D1 includes anode and cathode, wherein anode receives a predetermined telecommunications Number, such as ground signalling NGND；First electrode of the cathode as sensor devices is transmitted for receiving switch unit 221 Reference signal Vref.It should be noted that as long as reference signal Vref is corresponding with the prearranged signals to be applied to photodiode D1 Both ends when, can make the both ends photodiode D1 formed backward voltage, thus drive photodiode D1 execute light sensing.

When switch unit 221 is closed, reference signal Vref is transmitted to two pole of photoelectricity by the switch unit 221 of closure The cathode of pipe D1, due to having an equivalent capacity inside photodiode D1, reference signal Verf is to photodiode D1 Internal equivalent capacity charges, so that the voltage Vg on the cathode of photodiode D1 is gradually increasing and pre- first It fixes time when reaching, voltage Vg reaches the voltage value of reference signal Vref and remains unchanged.At this point, the both ends photodiode D1 Voltage difference is up to the backward voltage of driving photodiode work, i.e. photodiode D1 is in running order.Due to first Scanning drive signal switchs to low level signal when reaching the first predetermined time, by high level signal, and switch unit 221 is according to low Level signal disconnects, then discharge loop is formed inside photodiode D1.At this point, if thering is optical signal to be irradiated to the photodiode The reverse current of D1, photodiode D1 increase rapidly, so that the voltage Vg on the negative pole node of photodiode D1 is sent out therewith Changing is gradually reduced.Moreover, because the intensity of optical signal is bigger, the reverse current that photodiode D1 is generated is also bigger, Then the decrease speed of the voltage Vg on the negative pole node of photodiode D1 is faster.

Further, photosensitive unit 222 further includes an at least first capacitor c1.First capacitor c1 is for executing light sensing When, discharge loop is formed with sensor devices, to obtain corresponding photoreceptor signal.Specifically, as shown in Fig. 2, first capacitor c1 It is arranged in parallel with sensor devices, i.e. the first pole plate of first capacitor c1 is connect with the cathode of photodiode D1, first capacitor c1 The second pole plate meet a predetermined electrical signals, such as earth signal NGND.The negative of photodiode D1 is transmitted in reference signal Vref It when pole, also charges to first capacitor c1, and when switch unit 221 disconnects, first capacitor c1 and photodiode D1 shape It is also gradually reduced at the voltage (i.e. voltage Vg) of discharge loop, and the first pole plate of first capacitor c1.By the way that first capacitor is arranged C1 increases the capacitance of photosensitive unit 222, can be with to reduce the voltage decrease speed on photodiode D1 cathode Guarantee gets effective photoreceptor signal, improves photosensitive device 20 to the sensing precision of target object.

Further, above-mentioned first capacitor c1 is variable capacitance, such as the capacitor array formed by multiple capacitors, and this is more A capacitor is arranged in parallel, by controlling whether multiple capacitor accesses the volume change to realize first capacitor c1.Due to first Capacitor c1 is set as variable capacitance, therefore is adjusted by the capacity of first capacitor c1, adapts to the variation of optical signal received, To obtain accurate and effective photoreceptor signal.Specifically, if the light signal strength received is bigger, the appearance of first capacitor c1 Amount is bigger, if the light signal strength received is smaller, the capacity of first capacitor c1 is smaller.

In some embodiments, switch unit 221 includes a first transistor T1, and the first transistor T1 is for example but not Be limited to triode, metal-oxide-semiconductor, in thin film transistor (TFT) any one or it is several.By taking metal-oxide-semiconductor as an example, the first transistor T1 includes First coordination electrode C1, the first transmission electrode S1 and the second transmission electrode S2, wherein the first coordination electrode is the grid of metal-oxide-semiconductor, First transmission electrode S1 is the drain electrode of metal-oxide-semiconductor, and the second transmission electrode S2 is the source electrode of metal-oxide-semiconductor.First coordination electrode C1 and first Input terminal In1 connection, for receiving the first scanning drive signal；First transmission electrode S1 is connect with third input terminal In3, is used for Receive reference signal Vref；Second transmission electrode S2 is connect with the cathode of photodiode D1 in photosensitive unit 222.When passing through the When one input terminal In1 inputs the first scanning drive signal, the first transistor T1 is connected according to the first scanning drive signal, with reference to letter Number Vref is loaded into the cathode and first capacitor c1 of photodiode D1 through the first transmission electrode S1, the second transmission electrode S2 First pole plate；The first transistor T1 is connected and ends after continuing for the first predetermined time, first capacitor c1 and photodiode D1 shape At discharge loop, start to execute light sensing.

In some embodiments, signal output unit 223 includes a second transistor T2 and buffer circuit.Buffer circuit Electric signal for generating photosensitive unit 222 buffers.Second transistor T2 be such as, but not limited to triode, metal-oxide-semiconductor, In thin film transistor (TFT) any one or it is several.By taking metal-oxide-semiconductor as an example, second transistor T2 includes the second coordination electrode C2, third Transmission electrode S3 and the 4th transmission electrode S4, wherein the second coordination electrode C2 is the grid of metal-oxide-semiconductor, third transmission electrode S3 is The drain electrode of metal-oxide-semiconductor, the 4th transmission electrode S4 are the source electrode of metal-oxide-semiconductor.Second coordination electrode C2 is connect with the second input terminal In2, is used Control signal is exported in receiving；The third transmission electrode S3 is connect with the buffer circuit, for receiving buffer circuit output Electric signal；4th transmission electrode S4 is connect with the first output end Out1, for by by the buffer circuit buffering after electricity Signal output.

Further, buffer circuit is connected between photosensitive unit 222 and second transistor T2, is used for the photosensitive list Electric signal after 222 conversion of member is buffered, and in second transistor T2 conducting, exports the electric signal of buffering.The present embodiment In, which includes a third transistor T3, and it is brilliant that third transistor T3 is such as, but not limited to triode, metal-oxide-semiconductor, film In body pipe any one or it is several.By taking metal-oxide-semiconductor as an example, third transistor T3 includes third coordination electrode C3, the 5th transmission Electrode S5, the 6th transmission electrode S6, wherein third coordination electrode C3 is the grid of metal-oxide-semiconductor, and the 5th transmission electrode S5 is metal-oxide-semiconductor Drain electrode, the 6th transmission electrode S6 are the source electrode of metal-oxide-semiconductor.Third coordination electrode C3 is connect with the cathode of photodiode D1, is used for It receives photodiode D1 and executes the electric signal generated when light sensing；5th transmission electrode S5 is for receiving a voltage signal Vcc； 6th transmission electrode S6 is connect with the third transmission electrode S3 of second transistor T2, for exporting in second transistor T2 conducting The electric signal of buffering.

In above-mentioned third transistor T3, the voltage Vs of the 6th transmission electrode S6 changes with the voltage Vg of third coordination electrode C3 And change, no matter how the circuit load of i.e. the 6th transmission electrode S6 connection changes, do not affect the electricity of the 6th transmission electrode S6 Pressure.Moreover, because transistor characteristic, a low threshold voltage, the threshold voltage are transistor T3 to voltage Vs always than voltage Vg Threshold voltage.Therefore, buffer circuit plays the role of buffering isolation, the electricity generated when photosensitive unit 222 is executed light sensing Signal is isolated, and avoids other circuit loads from influencing the photoreceptor signal that photosensitive unit 222 generates, to ensure that light-sensitive image Element 22 accurately executes light sensing, improves photosensitive device 20 to the sensing precision of target object.

Referring to figure 3., Fig. 3 shows the signal sequence when execution of photosensitive pixel 22 light sensing shown in Fig. 2 at each node, Wherein Vg is the voltage on photodiode D1 cathode, is also the voltage on the third coordination electrode C3 of third transistor T3；Vs For the voltage on the 6th transmission electrode S6 of third transistor T3.

The t1 moment inputs the first scanning drive signal by first input end In1, so that the first transistor T1 is connected and holds Continuous first predetermined time (i.e. t2-t1) ends afterwards, and within first predetermined time, reference signal Vref is through the first transmission electrode S1 The cathode of photodiode D1 and the first pole plate of first capacitor c1 are transmitted to the second transmission electrode S2.Due to two pole of photoelectricity There is an equivalent capacity, therefore reference signal Verf charges to the equivalent capacity inside photodiode D1 inside pipe D1, So that the voltage Vg on the cathode of photodiode D1 is gradually increasing and protects after the voltage value for reaching reference signal Vref It holds constant.In addition, since first capacitor c1 is in parallel with photodiode D1, reference signal Vref also to first capacitor c1 into Row charging, so that the voltage on the first pole plate is gradually increasing and keeps not after the voltage value for reaching reference signal Vref Become.

T2 moment, the first scanning drive signal become low level signal from high level, i.e. first input end In1 becomes low electricity Ordinary mail number, the first transistor T1 cut-off, forms discharge loop between equivalent capacity and first capacitor c1 and photodiode D1.If There is optical signal irradiation on photodiode D1, then generates the current signal directly proportional to optical signal inside photodiode D1, because Voltage Vg on this photodiode D1 cathode is gradually decreased.Moreover, optical signal is stronger, the speed that voltage Vg is reduced is faster.Separately Outside, due to the voltage follow characteristic of third transistor T3, the voltage Vs on the 6th transmission electrode S6 of third transistor T3 is with light Voltage Vg on electric diode D1 cathode changes and changes, and voltage Vs Vth lower than voltage Vg always, the Vth are that third is brilliant The threshold voltage of body pipe T3.It should be noted that first predetermined time with guarantee in photosensitive unit 22 photodiode and First capacitor c1 charges to reference signal Vref.

T3 moment, that is, photosensitive unit 222 start after executing light sensing and reaching for the 4th predetermined time (i.e. t3-t2), By the second input terminal In2 input/output control signal, second transistor T2 is connected according to high level signal, at this time third crystal Third transmission electrode S3 and fourth transmission electrode S4 of the voltage Vs through second transistor T2 on the 6th transmission electrode S6 of pipe T3, It is exported from the first output end Out1.The voltage of first output end Out1 output first gradually rises up to the 6th transmission electricity from low level Voltage Vs on the S6 of pole, followed by the voltage Vs on the 6th transmission electrode S6 variation and change.It should be noted that this Four predetermined times were at least one clock cycle, and the 4th predetermined time cannot be too long, certainly can not be too short, to guarantee to feel Light unit 222 executes the photoreceptor signal generated when light sensing and can effectively export in time.

T4 moment, output control signal become low level signal from high level signal, i.e. the second input terminal In2 becomes low electricity The voltage of ordinary mail number, second transistor T2 cut-off, the first output end Out1 output is gradually reduced or remains unchanged.Under guaranteeing Effective output of secondary signal, the first output end Out1 output voltage need to gradually decrease down low level.When the above-mentioned t4 moment is with t3 This period between quarter, that is, the voltage Vs in the second predetermined time Δ t1, on the 6th transmission electrode S6 of third transistor T3 (that is, voltage Vg on photodiode D1 cathode) will be exported through second transistor T2 from the first output end Out1, therefore By reading the voltage signal of the first output end Out1, the sense that photodiode D1 is generated because receiving optical signal can be obtained The size of optical signal, and then generate the biological information of target object.

Further, above-mentioned second predetermined time Δ t1 can be fixed value, or changing value.Due to two pole of photoelectricity The optical signal that pipe D1 is received is bigger, and the decrease speed of voltage Vg is faster, so that the decrease speed of voltage Vs is also faster, therefore, For the accurately and effectively acquisition for realizing photoreceptor signal, the size of Δ t1 is adjusted according to the intensity of the optical signal received.Specifically, Light signal strength is bigger, then the second predetermined time Δ t1 is shorter；Light signal strength is smaller, then increases the second predetermined time Δ t1 and get over It is long.

In some embodiments, photosensitive pixel 22 and each scan line, number in photosensitive device 20 are shown referring to Fig. 4, Fig. 4 According to the connection structure of line and signal reference line, and the photosensitive pixel be Fig. 2 shows circuit structure.The photosensitive device 20 into one Step includes the scanline groups being electrically connected with multiple photosensitive pixels 22, data line group, signal reference line group.Wherein, scanline groups Including by a plurality of first scanline groups at the first scanline groups and by a plurality of second scanline groups at the second scanline groups, number It include multiple data lines according to line group, signal reference line group includes a plurality of signal reference line.By taking the photosensitive array 201 in Fig. 1 as an example, In photosensitive array 201, X-direction lastrow photosensitive pixel includes spaced n photosensitive pixel 22, the column sense in Y-direction Light pixel includes spaced m photosensitive pixel 22, therefore the photosensitive array 201 includes m*n photosensitive pixel 22 altogether.It is right Ying Di, the first scanline groups include the first scan line of m item, and first scan line of m item is alternatively arranged along Y-direction, such as G11, G12,…G1m；Second scanline groups further include the second scan line of m item, and second scan line of m item is also alternatively arranged along Y-direction, Such as G21, G22 ... G2m；Signal reference line group includes m bars reference line, and the m bars reference line is along Y-direction interval Arrangement, such as L1, L2 ... Lm；Data line group includes n data line, and the n data line is alternatively arranged in X direction, such as S1,S2,…Sn-1,Sn.Certainly, the scanline groups, data line group of photosensitive device 20 and signal reference line group may be other Regular fashion distribution or non-regular distribution.In addition, due to the first scan line, the second scan line, signal reference line and data Line is conductive, therefore leads between the first scan line, the second scan line, signal reference line and the data line being in the crossed position Insulating materials is crossed to be isolated.

Specifically, the first scan line of m item correspondence is connect with the first input end In1 of multiple photosensitive pixels 22, and m item second is swept It retouches line correspondence to connect with the second input terminal In2 of multiple photosensitive pixels 22, m bars reference line correspondence and multiple photosensitive pixels 22 The In3 connection of third input terminal, n data line correspondence is connect with the first output end Out1 of multiple photosensitive pixels 22.Wherein, it is Wiring is convenient, and the first scan line, the second scan line, signal reference line are drawn from X-direction, and data line draws from Y-direction Out.

In some embodiments, photosensitive device 20 further comprises photosensitive driving circuit, which is used for The first scanning drive signal and reference signal Vref are provided to the multiple photosensitive pixel, to drive multiple photosensitive pixels 22 to execute Light sensing, and after photosensitive pixel 22 starts to execute light sensing, it provides one and exports control signal to the multiple photosensitive pixel, control Photosensitive pixel 22 processed executes the electric signal output generated when light sensing.

Further, multiple photosensitive pixels 22 are in array distribution, and photosensitive driving circuit is further used for: line by line or interlacing mentions The multiple photosensitive pixel is given for the first scanning drive signal, to drive multiple photosensitive pixels line by line or interlacing execution light sensing, And after the photosensitive pixel of driving current line starts to execute light sensing, the photosensitive pixel for controlling current line executes what light sensing generated Electric signal output.In this way, once a line photosensitive pixel can be driven to be performed simultaneously light sensing by the photosensitive driving circuit, thus plus Fast sensed speed.

Further, please continue to refer to Fig. 4, which includes a photosensitive driving unit 24, photosensitive device 20 In the first scan line, the second scan line, signal reference line be connected to the photosensitive driving unit 24.Referring to figure 5., Fig. 5 shows The structure of photosensitive 24 1 embodiment of driving unit in Fig. 4 is gone out.The photosensitive driving unit 24 includes providing the first turntable driving The ginseng of first driving circuit 241 of signal, the second driving circuit 242 that output control signal is provided and offer reference signal Vref Examine circuit 243.Each circuit of the photosensitive driving unit 24 can be integrated in a control chip by silicon technology, this is photosensitive certainly Each circuit of driving unit 24 can also be formed separately from different control chips.For example, the first driving circuit 241 and second Driving circuit 242 and photosensitive pixel 22 are formed together on the same substrate, and reference circuit 243 is then by a connection piece (for example, soft Property circuit board) it is connect with a plurality of signal reference line on photosensitive device 20.

In some embodiments, for reference circuit 243 for providing reference signal Vref, which passes through sense The first switch (for example, the first transistor T1 in switch unit shown in Fig. 2 221) of light pixel 22 optionally with it is described Photosensitive unit 222 is electrically connected.In first switch closure, the first switch that reference signal Vref then passes through closure is transferred to Corresponding photosensitive unit 222.

First scan line of the first driving circuit 241 and photosensitive device 20 is electrically connected, for providing the first turntable driving Signal gives the first switch, and to control first switch closure, and when reaching the first predetermined time, control first switch is disconnected It opens, so that photosensitive unit 222 be driven to start to execute light sensing.Optionally, which is a pulse signal, and The duration of high level is the first predetermined time, such as t2-t1 shown in Fig. 3 in the pulse signal.First switch is according to height Level signal closure, disconnects according to low level signal.

Second scan line of the second driving circuit 242 and photosensitive device 20 is electrically connected, for disconnecting simultaneously in first switch After reaching the 4th predetermined time (for example, t3-t2 shown in Fig. 3), provide export control signal opened to the second of photosensitive pixel 22 It closes (for example, second transistor T2 in signal output unit shown in Fig. 2 223), control second switch closure, so that photosensitive list Member 222 executes the electric signal output generated when light sensing.Optionally, which controls signal as a pulse signal, and the pulse The duration of high level is the second predetermined time, such as t4-t3 shown in Fig. 3 in signal.Second switch is believed according to high level Number closure, disconnected according to low level signal.

In some embodiments, please continue to refer to Fig. 4, which further comprises signal processing unit 25, the data line in photosensitive device 20 shown in Fig. 4 is all connected with the signal processing unit 25, which can pass through Silicon technology is integrated in a detection chip.Certainly, which can also be integrated in photosensitive driving unit 24 In one processing chip.Specifically, which is used to generate when executing light sensing to the photosensitive unit 222 Electric signal is read out, and obtains the predetermined life in contact with or close to the target object of the photosensitive device according to the electric signal of reading Object characteristic information.It is understood that in order to collect accurately and effectively electric signal, within second scheduled time, at the signal The electric signal that reason unit 25 generates when can execute light sensing to photosensitive unit 222 is repeatedly read.

In some embodiments, which includes multiple treatment channels, optionally, each treatment channel It is correspondingly connected with a data line.So, change ground, can also each treatment channel be correspondingly connected at least two data lines, pass through The mode of time-sharing multiplex, the electric signal on a data line is read in selection every time, then the electricity on another data line of reselection Signal, and so on, until the electric signal on all data lines is read.So, it is possible to reduce the number for the treatment of channel, from And save the cost of photosensitive device 20.

Fig. 6 is please referred to, Fig. 6 shows another circuit structure of a photosensitive pixel 22 in Fig. 1.The utility model is implemented A photosensitive pixel 22 in mode has first input end In1 ', the second input terminal In2 ', third input terminal In3 ', the 4th input End and one first output end Out1 '.It includes that the first scanning drive signal and the second turntable driving are believed that light sensing, which controls signal, Number.The photosensitive pixel 22 includes 223 ' of 221 ' of switch unit, 222 ' of photosensitive unit and signal output unit.Wherein, switch unit 221 ' receive a reference signal Vref by third input terminal In3 ', in addition, 221 ' of switch unit also passes through first input end In1 ' receives one first scanning drive signal, and receives one second scanning drive signal by the 4th input terminal In4, and connecing When receiving the first scanning drive signal and the second scanning drive signal, reference signal Vref is transmitted to 222 ' of photosensitive unit, with It drives 222 ' of photosensitive unit to execute light sensing, and starts to execute light sensing in 222 ' of photosensitive unit and continue a pre- timing Between after terminate light sensing, and latched to the photoreceptor signal that light sensing generates is executed.222 ' of photosensitive unit receives optical signal, and The optical signal received is converted into corresponding electric signal when receiving optical signal.223 ' of signal output unit is defeated by second Enter to hold In2 ' to receive output control signal, and signal is controlled according to output, the electric signal that 222 ' of photosensitive unit is generated is from first Output end Out1 ' output.

Optionally, the first scanning drive signal and the second scanning drive signal, output control signal are a pulse signal, And first duration of high level signal in scanning drive signal be the first predetermined time, high level letter in output control signal Number duration be the second predetermined time, the duration of high level signal is the pre- timing of third in the second scanning drive signal Between, and the third predetermined time was greater than for the first predetermined time.

Specifically, the structure of 222 ' of photosensitive unit in present embodiment and 223 ' of signal output unit with it is shown in Fig. 2 Photosensitive unit 222 is consistent with the structure of signal output unit 223, and details are not described herein.221 ' of switch unit is in addition to including Fig. 2 institute Outside 221 structure of switch unit shown, the 4th transistor T4 is still further comprised.4th transistor T4 is such as, but not limited to three poles Pipe, metal-oxide-semiconductor, in thin film transistor (TFT) any one or it is several.By taking metal-oxide-semiconductor as an example, the 4th transistor T4 includes the 4th control Electrode C4, the 7th transmission electrode S7 and the 8th transmission electrode S8, wherein the 4th coordination electrode C4 is the grid of metal-oxide-semiconductor, the 7th is passed Transmission pole S7 is the drain electrode of metal-oxide-semiconductor, and the 8th transmission electrode S8 is the source electrode of metal-oxide-semiconductor.4th coordination electrode C4 and the 4th input terminal In4 connection, for receiving the second scanning drive signal；First electrode (such as the photoelectricity of 7th transmission electrode S7 and sensor devices The cathode of diode) it connects, the 8th transmission electrode S8 is connect with the first pole plate of first capacitor c1.And the of first capacitor c1 One pole plate is used for 223 ' of connection signal output unit, i.e. the third of the first pole plate of first capacitor c1 and third transistor T3 controls Electrode C3 connection.

Fig. 7 is please referred to, the photosensitive pixel 22 that Fig. 7 shows Fig. 6 executes signal sequence when light sensing, and wherein Vg is first Voltage and 222 ' of photosensitive unit on the first pole plate of capacitor c1 terminate the photoreceptor signal latched when light sensing, are also third Voltage on the third coordination electrode C3 of transistor T3；Vs is the voltage on the 6th transmission electrode S8 of third transistor T3.

The t1 moment inputs the first scanning drive signal by first input end In1 ', while defeated by the 4th input terminal In4 Enter the second scanning drive signal.According to the first scanning drive signal, the first transistor T1 is connected and continued for the first predetermined time (i.e. T2-t1), within first predetermined time, reference signal Vref is applied to through the first transmission electrode S1 and the second transmission electrode S2 On the cathode of photodiode D1.Due to having an equivalent capacity inside photodiode D1, reference signal Verf is to light Equivalent capacity inside electric diode D1 charges, so that the voltage on the cathode of photodiode D1 is gradually increasing simultaneously It is remained unchanged after the voltage value for reaching reference signal Vref.According to the second scanning drive signal, the 4th transistor T4 is connected simultaneously Continue third predetermined time Δ t2 (i.e. t3-t1), reference signal Vref applies through the first transistor T1 and the 4th transistor T4 To the first pole plate of first capacitor c1, thus charge to first capacitor c1, the voltage on the first pole plate of first capacitor c1 It is gradually increasing and is remained unchanged after the voltage value for reaching reference signal Vref.

T2 moment, the first scanning drive signal become low level from high level, and the second scanning drive signal remains as high electricity It is flat.At this point, first input end In1 ' becomes low level signal, the first transistor T1 cut-off, first capacitor c1 and photodiode D1 forms discharge loop, i.e. first capacitor c1 discharges to photodiode D1, the electricity on the first pole plate of first capacitor c1 Pressure Vg is gradually reduced.If no optical signal irradiation on photodiode D1, the electric current inside photodiode D1 is very weak, so Voltage Vg on the first pole plate of first capacitor c1 is held essentially constant；If having optical signal irradiation, light on photodiode D1 The current signal directly proportional to optical signal is generated inside electric diode D1, and optical signal is stronger, what photodiode D1 was generated Electric current is bigger, therefore the decrease speed of the voltage Vg on the first pole plate of first capacitor c1 is faster.Due to the spy of third transistor Property, the voltage Vs on the 6th transmission electrode S6 of third transistor T3 changes with the voltage Vg on the first pole plate of first capacitor c1 And change, and voltage Vs Vth lower than voltage Vg always, which is the threshold voltage of third transistor T3.

T3 moment, the second scanning drive signal become low level from high level.At this point, the 4th input terminal In4 becomes low electricity Ordinary mail number, the 4th transistor T4 cut-off, first capacitor c1 can not form discharge loop, then on the first pole plate of first capacitor c1 Voltage Vg will remain unchanged as, and the photoreceptor signal that generates latches when 222 ' of photosensitive unit then so being executed light sensing.

At the t4 moment, by third input terminal In3 ' input/output control signal, it is a pulse signal which, which controls signal, And the duration of high level was the second predetermined time in the pulse signal.Signal is controlled according to output, second transistor T2 is led Lead to, at this time sixth transmission electrode S6, second crystal of the voltage Vg through third transistor T3 on the first pole plate of first capacitor c1 The third transmission electrode S3 and the 4th transmission electrode S4 of pipe T2 is exported from the first output end Out1 '.The first output end Out1 ' The voltage of output first gradually rises up to the voltage Vs on the 6th transmission electrode S6 from low level, followed by the 6th transmission electrode S6 On voltage Vs variation and change.Due to the t3 moment, first capacitor c1 latches voltage Vg, the 6th transmission electrode Voltage Vs on S6 will remain unchanged as, therefore the voltage of the first output end Out1 ' output will be maintained at the amplitude of voltage Vs.

T5 moment, output control signal become low level from high level, and third input terminal In3 ' becomes low level signal, the The voltage of two-transistor T2 cut-off, the first output end Out1 ' output is gradually reduced or remains unchanged.In order to guarantee next signal Effectively output, the first output end Out1 output voltage need to gradually decrease down low level.Since the first output end Out1 ' is exported Voltage reflect photodiode D1 conversion after electric signal, therefore by read the first output end Out1 ' voltage signal, Can be obtained photodiode D1 because receiving optical signal changed electric signal size, and then generate target object life Object characteristic information.

Since in the utility model embodiment, 221 ' of switch unit is used not only for driving 222 ' of photosensitive unit and executes light sensation Survey, but also control 222 ' of photosensitive unit to terminate light sensing, and by 222 ' of photosensitive unit execute electric signal that light sensing generates into Row latches, therefore can be performed simultaneously light sensing in the photosensitive pixel do not gone together or even all photosensitive pixels are performed simultaneously light Sensing, so that the output control to photoreceptor signal provides time enough and flexibility.

Further, above-mentioned third predetermined time Δ t2 can be fixed value, or changing value.Due to two pole of photoelectricity The optical signal that pipe D1 is received is bigger, and the decrease speed of voltage Vg is faster, so that the decrease speed of voltage Vs is also faster, therefore, For the accurately and effectively acquisition for realizing photoreceptor signal, the size of Δ t2 is adjusted according to the intensity of the optical signal received.Specifically, Light signal strength is bigger, then third predetermined time Δ t2 is shorter；Light signal strength is smaller, then third predetermined time Δ t2 is longer.

Further, referring to Fig. 8, photosensitive device 20 further include the scanline groups being electrically connected with multiple photosensitive pixels 22, Data line group, signal reference line group.Wherein, scanline groups include by a plurality of first scanline groups at the first scanline groups, by A plurality of second scanline groups at the second scanline groups and by a plurality of third scanline groups at third scanline groups, data line group Including multiple data lines, signal reference line group includes a plurality of signal reference line.By taking the photosensitive array 201 in Fig. 1 as an example, photosensitive battle array In column 201, X-direction lastrow photosensitive pixel includes spaced n photosensitive pixel 22, the column photosensitive pixel in Y-direction Including spaced m photosensitive pixel 22, therefore the photosensitive array 201 includes m*n photosensitive pixel 22 altogether.Accordingly, First scanline groups include the first scan line of m item, and first scan line of m item is alternatively arranged along Y-direction, such as G11, G12 ... G1m；Second scanline groups include the second scan line of m item, and second scan line of m item is also alternatively arranged along Y-direction, such as G21, G22,…G2m；Third scanline groups include m third scan line, and the m third scan line is also alternatively arranged along Y-direction, example As G31, G32 ... G3m；Signal reference line group includes m bars reference line, and the m bars reference line is arranged along Y-direction interval Column, such as L1, L2 ... Lm；Data line group includes n data line, and the n data line is alternatively arranged in X direction, such as Sn1, Sn2,…Sn-1,Sn.Certainly, the scanline groups, data line group of photosensitive device 20 and signal reference line group may be other rule Then mode is distributed or non-regular is distributed.In addition, due to the first scan line, the second scan line, third scan line, signal reference Line and data line are conductive, therefore the first scan line, the second scan line, the third scan line, signal being in the crossed position It is isolated between reference line and data line by insulating materials.

Specifically, the first scan line is connect with the first input end In1 ' of photosensitive pixel 22, the second scan line and light-sensitive image Second input terminal In2 ' connection of element 22, signal reference line are connect with the third input terminal In3 ' of photosensitive pixel 22, third scanning Line is connect with the 4th input terminal In4 of photosensitive pixel 22, and data line is connect with the first output end Out1 ' of photosensitive pixel 22.Its In, in order to be routed conveniently, the first scan line, the second scan line, third scan line, signal reference line are drawn from X-direction, number It is drawn from Y-direction according to line.

In some embodiments, the photosensitive driving circuit of photosensitive device 20 is further used for: providing the first turntable driving Signal and the second scanning drive signal give multiple photosensitive pixels, so that photosensitive pixel 22 starts out when reaching the first predetermined time Begin after executing light sensing, when reaching the third predetermined time, control photosensitive pixel terminates to execute light sensing, and photosensitive pixel is held The electric signal generated when row light sensing is latched, and is provided one and is exported control signal to the multiple photosensitive pixel, to control sense The electric signal output that light pixel latches.

Further, multiple photosensitive pixels 22 are in array distribution, which is further used for: line by line or interlacing First scanning drive signal and the second scanning drive signal are provided to the multiple photosensitive pixel, to drive the multiple sense Light pixel is line by line or interlacing executes light sensing；Alternatively, providing first scanning drive signal and the second turntable driving letter simultaneously Number give all photosensitive pixels, to drive all photosensitive pixels to be performed simultaneously light sensing.In this way, passing through the photosensitive driving circuit A line photosensitive pixel or even all photosensitive pixels can be once driven to be performed simultaneously light sensing, to accelerate sensed speed.

Further, with continued reference to Fig. 8, which includes a photosensitive driving unit 24, the first scan line, the Two scan lines, third scan line, signal reference line are connected to the photosensitive driving unit 24.Specifically, Fig. 9 is please referred to, Fig. 9 shows The structure of photosensitive 24 1 embodiment of driving unit in Fig. 8 is gone out.The photosensitive driving unit 24 includes providing the first turntable driving 241 ' of the first driving circuit of signal, 242 ' of the second driving circuit that output control signal is provided, provide reference signal Vref's The third driving circuit 244 of the second scanning drive signal of 243 ' of electrical reference signal road and offer.Wherein, the photosensitive driving unit 24 Each circuit can be integrated in by silicon technology in a control chip, each circuit of certain photosensitive driving unit 24 can also divide Open form at.For example, 242 ' of 241 ' of the first driving circuit and the second driving circuit, third driving circuit 244 and photosensitive pixel 22 1 It rises and is formed on the same substrate, 243 ' of electrical reference signal road then passes through a plurality of signal on flexible circuit board and photosensitive device 20 and joins Examine line connection.

In some embodiments, for providing reference signal Vref, 243 ' of the reference circuit passes through 243 ' of reference circuit First switch (for example, the first transistor T1 in 221 ' of switch unit shown in fig. 6) optionally with the photosensitive unit 222 ' are electrically connected.In first switch closure, reference signal Vref is transferred to corresponding sense by the first switch being closed 222 ' of light unit.

First scan line of 241 ' of the first driving circuit and photosensitive device 20 is electrically connected, for providing the first turntable driving Signal is to first switch, to control first switch closure, and reaches at the first predetermined time (for example, t2-t1 shown in Fig. 7) When, control first switch disconnects, so that 222 ' of photosensitive unit be driven to start to execute light sensing.

The third scan line of third driving circuit 244 and photosensitive device 20 is electrically connected, in the first driving circuit While 241 ' provide the first scanning drive signal, the second scanning drive signal is provided and is switched to third (for example, shown in fig. 6 The 4th transistor T4 in 221 ' of switch unit), with while first switch is closed third switch be also closed, and opened in third When closing merging reaches third predetermined time (for example, t3-t1 shown in Fig. 7), control third switch is disconnected, to control photosensitive 222 ' of unit terminates to execute light sensing, and 222 ' of the photosensitive unit executes the electric signal generated when light sensing and locked by first capacitor c1 It deposits.

Second scan line of 242 ' of the second driving circuit and photosensitive device 20 is electrically connected, in control photosensitive unit 222 ' terminate after executing light sensing, such as switch in third and disconnected and reach the 5th predetermined time (such as when t4 shown in Fig. 7 Carve) when, it provides and exports control signal to second switch (for example, the second transistor in 223 ' of signal output unit shown in fig. 6 T2), control second switch was closed and continues the second predetermined time, the telecommunications generated when 222 ' of photosensitive unit is executed light sensing Number output.

In some embodiments, please continue to refer to Fig. 8, which further comprises signal processing unit 25, the data line in photosensitive device 20 shown in Fig. 9 is all connected with the signal processing unit 25, which can pass through Silicon technology is integrated in a detection chip.Certainly, which can also be integrated in photosensitive driving unit 24 In one processing chip.Specifically, which is used to execute what light sensing generated to 222 ' of photosensitive unit Electric signal is read out, and obtains the predetermined life in contact with or close to the target object of the photosensitive panel according to the electric signal of reading Object characteristic information.It is understood that giving signal since the electric signal generated when photosensitive unit executes light sensing is latched The signal-obtaining of processing unit 25 provides more sufficient time and flexibility, while also saving the sensing time, accelerates Sensed speed.In addition, within second scheduled time, which can in order to collect accurately and effectively electric signal It is repeatedly read with the electric signal generated when executing light sensing to 222 ' of photosensitive unit.

In some embodiments, Figure 10 is please referred to, Figure 10 shows the photoreceptor cartridge of another embodiment of the utility model The structure set.The photosensitive device 20 further comprises a photosensitive panel 200, which includes a substrate 26 again, multiple Photosensitive pixel 22 is set in the substrate 26.Optionally, which is in array distribution.The photosensitive pixel 22 is for receiving The optical signal that top is come, and the optical signal received is converted into corresponding electric signal, therefore multiple photosensitive pixels 22 is photosensitive Region deviding forms sensing region 203, and the region other than sensing region 203 is then non-sensing region 202.In order to facilitate route cloth If the non-sensing region 202 is for being arranged driving circuit needed for photosensitive pixel 22 executes light sensing, or the electron-donating company of setting The line bonding area of fitting connection.The even whole circuits of the partial circuit of above-mentioned photosensitive driving circuit may be provided in substrate 26. For example, the first driving circuit 241 and the second driving circuit 242, reference circuit 243 are equal by taking photosensitive device 20 shown in Fig. 4 as an example It is formed in substrate 26.Alternatively, the first driving circuit 241, the second driving circuit 242, reference circuit 243 are by being electrically connected part (for example, flexible circuit board) and photosensitive pixel 22 are electrically connected.

In some embodiments, above-mentioned signal processing unit 25 can be that selection is formed in substrate according to the type of substrate 26 On 26, or selection is for example electrically connected by being electrically connected part (for example, flexible circuit board) and photosensitive pixel 22.For example, working as When the substrate 26 is silicon base, the signal processing unit 25 be may be optionally formed in substrate 26, and also alternative such as passes through Flexible circuit board and photosensitive pixel 22 are electrically connected；When the substrate 26 is dielectric base, the signal processing unit 25 is then It needs for example to be electrically connected by flexible circuit board and photosensitive pixel 22.

In some embodiments, which is a photosensitive bare die (Die), as semiconductor integrated circuit Device.

Further, Figure 11 is please referred to, Figure 11 shows the structure of the photosensitive mould group of one embodiment of the utility model.It should Photosensitive mould group includes the photosensitive device of above-mentioned any one embodiment.Further, the photosensitive mould group 2 further include one it is anti-aliasing at Element 28, the anti-aliasing image-forming component 28 are arranged on the photosensitive panel 200 of photosensitive device 20, adjacent photosensitive for preventing The optical signal that pixel 22 receives generates aliasing, to improve the sensing precision of photosensitive mould group 2.Further, it is anti-aliasing at Element 28 includes multiple the first transmission regions 282 passed through for optical signal, and the photosensitive unit 222 of multiple photosensitive pixels 22 is corresponding It is set to multiple first transmission region, 282 lower section.

The photosensitive mould group 2 of the utility model embodiment by the way that anti-aliasing image-forming component 28 is arranged on photosensitive panel 200, And the photosensitive unit 222 of photosensitive pixel 22 and the first transmission region 282 of anti-aliasing image-forming component 28 are correspondingly arranged, to make It is more visible to obtain the biological information obtained after the execution light sensing of photosensitive unit 222, to improve the sensing of photosensitive device 20 Precision.

In some embodiments, photosensitive unit 222 and 282 face of the first transmission region are arranged, so can guarantee across The optical signal of first transmission region 282 is all received by photosensitive unit 222, improves the sensing precision of photosensitive device 20.

In some embodiments, anti-aliasing image-forming component 28 has extinction characteristic, is irradiated to anti-aliasing image-forming component 28 On optical signal in, only could be from the first light transmission of anti-aliasing image-forming component 28 with the approximately perpendicular optical signal of the substrate 26 Region 282 passes through, to be received by photosensitive unit 222, remaining optical signal is absorbed by anti-aliasing image-forming component 28.In this way, It can prevent received optical signal between adjacent photosensitive unit 222 from generating aliasing.It should be noted that approximate with substrate 26 hang down Straight optical signal includes the optical signal perpendicular to the substrate 26, and deviates preset angle relative to the vertical direction of the substrate 26 Spend the optical signal in range.The predetermined angle range is in ± 20 °.

In some embodiments, as shown in figure 12, Figure 12 shows the optical signal model across anti-aliasing image-forming component 28 It encloses.Due to the extinction characteristic of anti-aliasing image-forming component 28, the optical signal between only optical signal L1 and optical signal L2 can pass through First transmission region 282 reaches photosensitive unit 222, remaining optical signal is inhaled by the extinction wall 281 of anti-aliasing image-forming component 28 It receives.As shown in Figure 12, the cross-sectional area of the first transmission region 282 is smaller, passes through the angle of the optical signal of the first transmission region 282 The range of α is smaller, therefore the anti-aliasing effect of anti-aliasing image-forming component 28 is better.In this way, being set by anti-aliasing image-forming component 28 First transmission region 282 of the relatively small area set, can improve the anti-aliasing effect of anti-aliasing image-forming component 28.In addition, due to anti- The cross-sectional area of first transmission region 282 of aliasing image-forming component 28 is smaller, therefore each photosensitive unit 222 will be corresponding multiple The first transmission region of light 282 improves the sense of photosensitive mould group 2 so that photosensitive unit 222 can sense enough optical signals Survey precision.

In some embodiments, please continue to refer to Figure 11, anti-aliasing image-forming component 28 includes extinction wall 281, above-mentioned more A first transmission region 282 is enclosed by extinction wall 282.The extinction wall 281 is formed by light absorbent.The light absorbent includes Metal oxide, charcoal blacking, black ink etc..Wherein, the metal in metal oxide is such as, but not limited to chromium (Cr), nickel (Ni), the one or more of iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), molybdenum (Mo).First transmission region 282 it is axially extending Direction is the direction vertical with substrate 26, so as to be irradiated in the optical signal of anti-aliasing image-forming component 28, it is approximate with substrate 26 to hang down Optical signal on straight direction can pass through the first transmission region 282, remaining optical signal is absorbed by extinction wall 281.

Further, Figure 13 is please referred to, Figure 13 shows the anti-aliasing image-forming component 28 of one embodiment of the utility model Structure.Extinction wall 281 is multilayered structure, and the extinction wall includes the extinction block 281a and keel of alternately laminated setting 281b.In one embodiment, extinction block 281a is formed by light absorbent.The light absorbent is such as, but not limited to metal oxidation Object, charcoal blacking, black ink etc..Wherein, the metal in metal oxide is such as, but not limited to chromium (Cr), nickel (Ni), iron (Fe), the one or more of tantalum (Ta), tungsten (W), titanium (Ti), molybdenum (Mo).Keel 281b is such as, but not limited to by transparent material Hyaline layer of formation, such as trnaslucent materials, light absorbent etc..

In some embodiments, multiple intervals the extinction block 281a setting being located on the same floor, and respectively inhaled in the same layer Region corresponding to interval between light block 281a is the first transmission region 282.Further, multiple extinction blocks of same layer 281a and multiple keel 281b can once be made.Specifically, by providing an exposure mask, what the exposure mask was integrally formed Diaphragm, and the diaphragm corresponds to the position formation aperture of extinction block 281a, and the shape of the shape of the aperture and size and extinction block 283 Shape is in the same size.By the exposure mask, successively vapor deposition forms the extinction block 281a and keel being arranged alternately on a carrier 281b, to form anti-aliasing image-forming component 28.

By the setting of keel 281b, the processing procedure of anti-aliasing image-forming component 28 is not only accelerated, and passes through keel The height of 281b is arranged, and can guarantee the anti-aliasing effect of anti-aliasing image-forming component 28.

In some embodiments, transparent material can be filled in above-mentioned first transmission region 282, it is anti-aliasing to increase The intensity of image-forming component layer also can avoid impurity and enter in the first transmission region 282 and influence translucent effect.In order to guarantee first The translucent effect of transmission region 282, transparent material can select the biggish material of light transmittance, for example, glass, PMMA (acrylic), PC (polycarbonate) etc..

In some embodiments, Figure 14 is please referred to, Figure 14 shows the anti-aliasing of another embodiment of the utility model The structure of image-forming component.The anti-aliasing image-forming component 28 is multilayered structure, and the anti-aliasing image-forming component 28 includes alternately laminated The light-absorption layer 283 and clear support layer 284 of setting；The light-absorption layer 283 includes multiple spaced extinction block 283a；It is described Clear support layer 284 is filled by transparent material to be formed, and fills the interval 283b between the extinction block 283a together；Wherein institute It states the corresponding region interval 283b and forms first transmission region 282.

Further, Figure 15 is please referred to, Figure 15 shows the anti-aliasing image-forming component of one embodiment of the utility model Preparation process.Specifically, when preparing anti-aliasing image-forming component 28, one layer of light absorbent is first coated on a carrier, and The corresponding partial etching of the first transmission region 282 is fallen on light-absorbing material layer, part is not etched and forms multiple extinction blocks 283a.The lithographic technique is such as, but not limited to photoengraving, X-ray etching, electron beam lithography and ion beam etching.And it etches Type may include dry etching and two kinds of wet etching.Then, transparent material layer is coated on extinction block 283 after the etching, And the transparent material not only covers multiple extinction block 283a, also fills the interval 283b between multiple extinction block 283a together, from And form clear support layer 284.Then, multiple extinctions are formed in clear support layer 284 according to the generation type of light-absorption layer 283 Block 283a, and so on form the alternately stacked light-absorption layer 283 of multilayer and clear support layer 284, to form anti-aliasing imaging Element 28.

Further, in order to guarantee the translucent effect of the first transmission region 282, the transparent material of clear support layer 284 is formed Material can select the biggish material of light transmittance, such as glass, PMMA (acrylic), PC (polycarbonate), epoxy resin etc..

In some embodiments, Figure 16 is please referred to, Figure 16 shows the anti-aliasing of another embodiment of the utility model The structure of image-forming component.The anti-aliasing image-forming component 28 includes the light-absorption layer 283 and clear support layer 284 of alternately laminated setting, Every layer of light-absorption layer 283 includes multiple spaced extinction block 283a.And the thickness of every layer of clear support layer 284 is unequal.I.e. The value of thickness h 1, h2 and h3 is unequal in Figure 18.Optionally, the thickness of the clear support layer 284 successively increases, i.e. and h1 < h2 < h3.The optical signal that can be so deviated other than ± 20 ° to avoid opposed substrate vertical direction is transparent across extinction block 283a Supporting layer 284, to improve the sensing precision of photosensitive mould group 2.It should be noted that the thickness of every layer of clear support layer 284 The width and height parameter of parameter and extinction block 283a can carry out different setting and a variety of setting combinations, to mention The sensing precision of high photosensitive mould group 2.

In some embodiments, anti-aliasing image-forming component 28 is formed directly on photosensitive panel 200, i.e., above-mentioned anti-aliasing The carrier when formation of image-forming component 28 is the photosensitive panel 200 equipped with photosensitive pixel 22.So, change ground, this it is anti-aliasing at Element 28 is set to again on the photosensitive panel 200 equipped with photosensitive pixel 22 after being for example separately made, to accelerate photosensitive mould The processing procedure of group 2.

In some embodiments, multiple first transmission regions 282 are uniformly distributed in anti-aliasing image-forming component 28, to make The preparation process for obtaining anti-aliasing image-forming component 28 is simpler.

In some embodiments, by taking target object is the organism such as finger as an example, when finger is in contact with or close to photosensitive mould When group 2, if there is ambient lighting to penetrate on finger, and finger has many institutional frameworks, such as epidermis, bone, meat, blood vessel etc., Therefore the part optical signals in environment light can penetrate finger, and part optical signals are then by finger.The optical signal for penetrating finger will Photosensitive unit 222 is reached, photosensitive unit 222 is not only sensed through the reflected optical signal of target object at this time, is also sensed Environment light penetrates the optical signal of finger, so can not accurately be sensed.Therefore, in order to avoid environment shadow rings photosensitive unit The sensing of 222 pairs of target objects, please refers to Figure 17, and Figure 17 shows the knots of the photosensitive mould group of another embodiment of the utility model Structure.The photosensitive mould group 2 further comprises filter coating 29, the filter coating 29 setting the anti-aliasing image-forming component 28 with it is described Between photosensitive panel 200, wherein the filter coating is for the optical signal other than default wave band to be filtered.So, it changes Ground, the anti-aliasing image-forming component 28 are arranged between the filter coating 29 and the photosensitive panel 200, such as filter coating 29 is arranged In side of the anti-aliasing image-forming component 28 far from photosensitive panel 200.

The utility model embodiment will reflect back into the optical signal come the light preset other than wave band by the filter coating 29 Target signal filter, to improve the sensing precision of photosensitive mould group 2.

In some embodiments, presetting wave band is the corresponding wave band of blue light signal, i.e. filter coating 29 believes blue light Optical signal other than number filters out.

In some embodiments, presetting wave band is the corresponding wave band of green light signal, i.e. filter coating 29 believes green light Optical signal other than number filters out.

In the red light signal of environment light, blue light signal and green light signal, the target objects such as finger F is to red The absorption of optical signal is most weak, followed by green light signal, most strong to the absorption of blue light signal.I.e. ambient lighting is penetrated in finger On, a large amount of blue light signal is only a small amount of by finger, penetrates finger even without blue light signal.Therefore, it selects Blue light signal or green light signal are filtered with the optical signal of wave section, can eliminate the interference of environment light significantly, are improved The sensing precision of photosensitive mould group 2.

In some embodiments, which is a biology sensing chip, for sensing photosensitive 2 top of mould group The biological information of target object.Optionally, which is a fingerprint sensing chip, for sensing user's finger Fingerprint image.

Further, which further comprises packaging body (not shown go out), and the packaging body is used for the sense All devices of 200 top of optic panel 200 and the photosensitive panel are packaged, such as anti-aliasing imaging layer 28 and optical filtering Film 29 is packaged.In particular, when anti-aliasing imaging layer 28 is located at 29 top of filter coating, which can fill together Transmission region 282.

Figure 18 is please referred to, Figure 18 shows the partial structurtes of the display module 1 of one embodiment of the utility model.The display Mould group 1 includes a display device (not shown) and photosensitive mould group 2.The display device includes a display panel 300 again, is used for It executes image to show, and is equipped with the second transmission region (not shown) in the viewing area of the display panel 300.Photosensitive mould group 2 be the photosensitive mould group 2 of any of the above-described embodiment, and the photosensitive mould group 2 is arranged below display panel 300, for sense from The optical signal that second transmission region projects, to obtain the predetermined biology spy in contact with or close to the target object of the display module 1 Reference breath.

Since photosensitive mould group 2 is located at 300 lower section of display panel, display panel 300 has to be reflected back for target object The second transmission region that the optical signal come passes through, so that the photosensitive panel 200 in photosensitive mould group 2 can be received across display The optical signal of panel 300, and the optical signal received is converted into electric signal, contact is obtained according to the electric signal after conversion or is connect The predetermined biological information of the target object of nearly display module 1.

In some embodiments, display panel 300 is such as, but not limited to OLED display device, as long as being able to achieve display effect Fruit and have the display device of the transmission region passed through for optical signal in the protection scope of the utility model.

In some embodiments, Figure 19 is please referred to, Figure 19 shows display panel 300 when being OLED display screen, OLED The part composed structure of display screen.By taking display panel 300 is OLED display screen as an example, which includes transparent substrate 301, the anode 302 that is formed on transparent substrate 301, is formed in luminescent layer 303 at the luminescent layer 303 being formed on anode 302 Cathode 304.When anode 302 is with application voltage signal corresponding on cathode 304, be gathered in anode 302 with it is a large amount of on cathode 304 Carrier will be mobile to luminescent layer 303 and enters luminescent layer 303, so that luminescent layer 303 be excited to issue corresponding optical signal.It needs Illustrate, Figure 19 illustrates only the part-structure of OLED display screen, and OLED display screen also has other structures, different herein One explanation.

In some embodiments, which can be bottom emitting structure, emission structure at top, transparent two sides knot Structure, moreover, the display screen can be the hard screen of rigid, or the flexible screen of flexible material.

Further, cathode 302 and cathode 304 and luminescent layer 303 form display pixel 32, and the display pixel 32 is wrapped Red sub-pixel R, green sub-pixels G and tri- kinds of display pixels of blue subpixels B are included, the optical signal that wherein red pixel R is projected For red light signal, the optical signal that green pixel G is projected is green light signal, and the optical signal that blue pixel B is projected is blue light Signal.Certainly, which can also include black sub-pixels, white sub-pixels；Or red sub-pixel, the sub- picture of green Element, blue subpixels and white sub-pixels etc..

In some embodiments, substrate is used as using transparent substrate 301 due to display pixel 32, thus it is not set nontransparent The region of device and nontransparent route is then transmission region, i.e., passes through for optical signal.Therefore, the utility model embodiment In, by the corresponding lower section for being located at the region passed through for optical signal of the photosensitive unit 222 of photosensitive pixel 22, so that sensor devices connect Receive the biological information sensing realized through the reflected optical signal of target object to target object.

Further, display panel 300 further includes the driver circuit (not shown) for driving each display pixel 32 luminous, And display device further comprises display driver circuit (not shown), which can be set in each aobvious Show between pixel 32, also can be set in each 32 lower section of display pixel.Display driver circuit can be set in display panel 300 On, it can also be connect by flexible circuit board with display pixel 32.The display driver circuit is for driving multiple display pixels 32 It shines, light source when light sensing is carried out for use as the photosensitive mould group 2.

In some embodiments, photosensitive panel 200 is for executing any position in the display area to display panel 300 Target object biological information sensing.For example, specifically, such as incorporated by reference to referring to Fig.1 8, Figure 19 and Figure 20, display surface Plate 300 have a display area 305 and non-display area 306, the display area 305 by display panel 300 all display pictures The light emitting region of element 32 is defined, and the region other than display area 305 is non-display area 306, and non-display area 306 is for being arranged The line bonding area for driving the circuits such as the display driver circuit of display pixel 32 or setting to connect for flexible circuit board.Photosurface Plate 200 have a sensing region 203 and non-sensing region 204, the sensing region 203 by photosensitive panel 200 all light-sensitive images The sensing region of element 22 defines, and the region other than sensing region 203 is non-sensing region 204, and non-sensing region 204 is for being arranged The photosensitive driving unit 24 for driving photosensitive pixel 22 to execute light sensing waits circuits or the line bonding for flexible circuit board connection Area.The shape of sensing region 203 is consistent with the shape of display area 305, and the size of sensing region 203 is greater than or equal to display The size in region 305, so that photosensitive panel 200 can be in contact with or close to any position in the display area of display panel 300 305 The sensing of the predetermined biological information for the target object set.Further, the area of photosensitive panel 200 is less than or equal to display The area of panel 300, and the shape of photosensitive panel 200 is consistent with the shape of display panel 300, is so convenient for photosensitive panel 200 With the assembling of display panel 300.So, ground is changed, in some embodiments, the area of photosensitive panel 200 can also be greater than The area of display panel 300.

In some embodiments, the sensing region 203 of the photosensitive panel 200 also may be less than display panel 300 Display area 305, to realize the predetermined biological characteristic letter of the target object of the regional area of 300 display area 305 of display panel The sensing of breath.

Further, display device is further used for executing touch-sensing, when the display device detects target object Touch or after, the display driver circuit drives the display pixel of corresponding touch area to shine.

Further, the knot of the electronic equipment of one embodiment of the utility model is shown referring to Figure 21 and Figure 22, Figure 21 Structure, Figure 22 shows electronic equipment shown in Figure 21 along the cross-section structure of an embodiment of I-I line, and Figure 22 is illustrated only The part-structure of electronic equipment.The electronic equipment includes above-mentioned any one photosensitive device for implementing structure or photosensitive mould group, shows Show mould group, not only image for electronic equipment was shown, but also the biology for the target object in contact with or close to electronic equipment is special Reference breath is sensed.

Electronic equipment for example but is not limited to consumer electrical product, household formula electronic product, vehicular electronic product, gold Melt the electronic product of the suitable types such as end product.Wherein, consumer electrical product for example mobile phone, tablet computer, notebook electricity Brain, tabletop display, computer all-in-one machine etc..Household formula electronic product for example intelligent door lock, TV, refrigerator, wearable device etc.. Vehicular electronic product for example automatic navigator, vehicle-carrying DVD etc..Financial terminal product for example ATM machine, self-service transacting business end End etc..For electronic equipment shown in Figure 21 by taking the mobile terminal of cell phone type as an example, right above-mentioned biological sensing mould group is equally applicable to it Its suitable electronic product, it is not limited to the mobile terminal of cell phone type.

Specifically, the front of the mobile terminal 3 is equipped with a display device (not shown), which includes a display surface Plate 300 is equipped with cover sheet 400 above the display panel 300.Optionally, the screen of the display panel 300 accounts for relatively high, such as 80% or more.Screen accounting refers to that the display area 305 of display panel 300 accounts for the ratio of the front surface region of mobile terminal 3.This is photosensitive Photosensitive panel 200 is a panel construction being adapted to display panel 300 in mould group 2, and is correspondingly arranged at the display panel 300 Lower section.If the display panel 300 is flexible curved surface shape, which is also flexible curved surface shape.Therefore, the photosurface Plate 200 simultaneously not only indicates planar structure, or curved-surface structure.In this way, convenient for photosensitive panel 200 and display panel 300 Stacking assembling.

In the utility model embodiment, the electronic equipment is in addition to photosensitive mould group 2 described in above embodiment Effect outside, also using display panel 300 issue optical signal realize target object biological information sense, do not need volume Outer setting light source to not only save the cost of electronic equipment, and also achieves docking touching or touch display panel 300 Target object carries out biological information sensing in display area 305.In addition, after the photosensitive mould group 2 can be separately made, then into The assembling of row electronic equipment, to accelerate the preparation of electronic equipment.

When mobile terminal 3 is in bright screen state and is in biological information sensing modes, the display panel 300 hair Optical signals.When an object is in contact with or close to the viewing area, which receives is believed by the reflected light of the object Number, the optical signal received is converted as corresponding electric signal, and is believed according to the predetermined biological characteristic that the electric signal obtains the object Breath, for example, information in fingerprint.To which the photosensitive device 20 can be realized to the mesh in contact with or close to display area any position Mark object is sensed.

So, ground is changed, in some embodiments, 3, Figure 23 shows electronic equipment shown in Figure 21 referring to figure 2. Along the cross-section structure of another embodiment of I-I line, and Figure 23 illustrates only the part-structure of electronic equipment.The utility model The photosensitive mould group of embodiment is applied to a mobile terminal 3, and the front of the mobile terminal is equipped with a display panel 300, the display Cover sheet 400 is equipped with above panel 300.The screen of the display panel 300 account for it is relatively high, such as 80% or more.Screen accounting refers to The actual displayed region 305 of display panel 300 accounts for the ratio of the front surface region of mobile terminal.The reality of the display panel 300 is aobvious Show and be equipped with a biological sensing region touched for target object in region 305 at lower position, to carry out the biology of target object Characteristic information sensing, such as target object are finger, then the biological sensing region is fingerprint identification region, to carry out fingerprint knowledge Not.Accordingly, the position that the fingerprint identification region is corresponded to below display panel 300 is equipped with a photosensitive mould group 2, the photosensitive mould group 2 For obtaining the fingerprint image of the finger when finger is placed in fingerprint identification region S.It is understood that being set to display When lower position is for user's hand-held mobile terminal in panel 300, facilitate the position of finger touch display panel 300.Certainly, Also it can be set in the other positions for facilitating finger to touch.

In some embodiments, electronic equipment further comprises a touch sensor (not shown), passes through the touching Touch area of the target object on cover sheet 400 can be determined by touching sensor.The touch sensor uses capacitance touch sense Survey technology, naturally it is also possible to by other means, such as resistive touch sensing, pressure-sensitive touch-sensing etc..The touch Sensor is used to the touch area of the target object is determined, with driving when a target object contacts the cover sheet 400 The display pixel of corresponding touch area is lighted and photosensitive pixel executes light sensing.

In some embodiments, the touch sensor perhaps with the cover sheet 400 is integrated or and photosurface Plate 200 is integrated, or integrated with display panel 300.By integrated touch sensor, the touching to target object is not only realized Detection is touched, and also reduces the thickness of electronic equipment, is conducive to electronic equipment and develops towards lightening direction.

In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-mentioned embodiment party Formula is exemplary, and should not be understood as limiting the present invention, and those skilled in the art are in the utility model Above embodiment can be changed, be modified in range, replacement and variant.

Claims

1. a kind of photosensitive device, it is characterised in that: including the multiple photosensitive pixels of a substrate and setting on the substrate, institute Stating photosensitive pixel includes sensing unit and signal output unit；Wherein,

The sensing unit, when receiving light sensing control signal, executes light sensing for receiving light sensing control signal, and Generate corresponding photoreceptor signal；

The signal output unit controls signal for receiving output, and when receiving the output control signal, will be described The photoreceptor signal output that sensing unit generates.

2. photosensitive device as described in claim 1, it is characterised in that: the light sensing control signal includes the first turntable driving Signal, the sensing unit include switch unit and photosensitive unit；Wherein,

The switch unit drives for receiving a reference signal and first scanning drive signal receiving the first scanning When dynamic signal, by the reference signal transmission to the photosensitive unit；

The photosensitive unit is used to receive the reference signal that the switch unit transmits, and when reaching the first predetermined time Start to execute light sensing, generates corresponding photoreceptor signal.

3. photosensitive device as claimed in claim 2, it is characterised in that: the photosensitive unit includes an at least sensor devices, and The sensor devices include first electrode, the reference signal transmitted for receiving the switch unit.

4. photosensitive device as claimed in claim 3, it is characterised in that: the sensor devices are photodiode, and the light The cathode of electric diode is the first electrode of the sensor devices, the reference signal transmitted for receiving the switch unit Vref, the anode of the photodiode connect a predetermined voltage signals.

5. photosensitive device as claimed in claim 3, it is characterised in that: the photosensitive unit further comprises a first capacitor； First pole plate of the first capacitor is for receiving the reference signal that the switch unit transmits, the first capacitor The second pole plate connect a predetermined voltage signals, and the first capacitor when sensing unit executes light sensing with the photoreceptor Part forms discharge loop.

6. photosensitive device as claimed in claim 5, it is characterised in that: the first capacitor is a variable capacitance or described First capacitor is the capacitor array being made of multiple capacitors.

7. photosensitive device as claimed in claim 5, it is characterised in that: the switch unit includes a first transistor, and institute Stating the first transistor includes the first coordination electrode, the first transmission electrode and the second transmission electrode；Wherein, first coordination electrode For receiving first scanning drive signal, for receiving the reference signal, described second passes first transmission electrode Transmission pole is connect with the first electrode of the sensor devices；The first transistor is receiving first scanning drive signal When be connected, by the reference signal transmission to the first electrode of the sensor devices.

8. the photosensitive device as described in any one of claim 1-7, it is characterised in that: the signal output unit includes one Second transistor and buffer circuit；The buffer circuit is connected between the second transistor and the sensing unit, is used for The electric signal generated when the sensing unit is executed light sensing buffers；The second transistor includes the second control electricity Pole, third transmission electrode and the 4th transmission electrode, wherein the second coordination electrode controls signal for receiving the output, described the Three transmission electrodes are for connecting buffer circuit, second transistor closure when receiving output control signal, by buffering Electric signal is exported by the 4th transmission electrode；Wherein, it is predetermined to continue second for the high level signal in the output control signal Time.

9. photosensitive device as claimed in claim 8, it is characterised in that: the buffer circuit includes a third transistor, and institute Stating third transistor includes third coordination electrode, the 5th transmission electrode, the 6th transmission electrode；Wherein, the third coordination electrode For connecting the first electrode of the sensor devices, for receiving a voltage signal, the described 6th passes the 5th transmission electrode Transmission pole is connect with the third transmission electrode of the second transistor.

10. photosensitive device as claimed in claim 8, it is characterised in that: second predetermined time is according to the sensing unit The dynamic changes of strength of the optical signal received adjusts.

11. photosensitive device as claimed in claim 10, it is characterised in that: the intensity of the optical signal received is bigger, the Two predetermined times are shorter；The intensity of the optical signal received is smaller, and the second predetermined time is longer.

12. photosensitive device as claimed in claim 7, it is characterised in that: the switch unit is further used for, described photosensitive Unit starts to execute light sensing and terminates light sensing after continuing a predetermined time, and to execute photoreceptor signal that light sensing generates into Row latches, and when so that the signal output unit receiving the output control signal, the photoreceptor signal of the latch is exported.

13. photosensitive device as claimed in claim 12, it is characterised in that: the light sensing control signal further comprises second Scanning drive signal, the switch unit further comprise the 4th transistor, and the 4th transistor includes the 4th coordination electrode, the Seven transmission electrodes, the 8th transmission electrode, the 4th coordination electrode is for receiving second scanning drive signal, and the described 7th Transmission electrode is connect with the first electrode of the sensor devices, the first pole plate of the 8th transmission electrode and the first capacitor Connection, the first pole plate of the first capacitor are connect with the signal transmission unit；The wherein height in the second scanning drive signal Level signal continues the third predetermined time, and the third predetermined time was greater than for the first predetermined time.

14. photosensitive device as claimed in claim 12, it is characterised in that: the first capacitor is used in the photosensitive unit knot When Shu Zhihang light sensing, the photoreceptor signal generated when executing light sensing is latched.

15. photosensitive device as described in claim 1, it is characterised in that: the sensing unit of the multiple photosensitive pixel is held simultaneously Row light sensing.

16. photosensitive device as described in claim 1, it is characterised in that: the substrate is silicon base, metallic substrates, printing electricity Road plate or dielectric base.

17. photosensitive device as described in claim 1, it is characterised in that: be additionally provided in the substrate respectively with the multiple sense Scanline groups, data line group and the signal reference line group that light pixel is electrically connected.

18. photosensitive device as claimed in claim 17, it is characterised in that: the photosensitive device further comprises corresponding and scanning The photosensitive driving unit that line group is connected with signal reference line group, and the signal processing unit being connect with data line group；The sense Optical drive unit controls the multiple photosensitive pixel and executes light sensing for driving the multiple photosensitive pixel to execute light sensing When generate electric signal output；The electric signal that the signal processing unit is used to export the multiple photosensitive pixel is read It takes, and is believed according to the predetermined biological characteristic that the electric signal of reading is obtained in contact with or close to the target object above the photosensitive device Breath.

19. photosensitive device as claimed in claim 18, it is characterised in that: the photosensitive driving unit is arranged in the substrate On, or pass through connector and the electric connection of the scanline groups and signal reference line group；The signal processing unit is arranged in institute It states in substrate, or is electrically connected by connector and the data line group.

20. photosensitive device as described in claim 1, it is characterised in that: the photosensitive device is a sensitive chip.

21. photosensitive device as described in claim 1, it is characterised in that: the photosensitive device is for sensing finger print information.

22. a kind of photosensitive mould group, it is characterised in that: including the photosensitive device as described in any one of claim 1-21.

23. photosensitive mould group as claimed in claim 22, it is characterised in that: the photosensitive device includes a photosensitive panel, and institute Stating photosensitive panel includes the multiple photosensitive pixels of substrate and setting on the substrate；The photosensitive mould group further comprises resisting Aliasing image-forming component, and the anti-aliasing image-forming component is set on the photosensitive panel.

24. photosensitive mould group as claimed in claim 23, it is characterised in that: the photosensitive mould group further comprises filter coating, and The filter coating be set to side of the anti-aliasing image-forming component far from the photosensitive panel, or be set to the photosensitive panel with Between the anti-aliasing image-forming component.

25. photosensitive mould group as claimed in claim 23, it is characterised in that: the photosensitive device includes a photosensitive panel, and institute Stating photosensitive panel includes the multiple photosensitive pixels of substrate and setting on the substrate；The photosensitive mould group further comprises filter Light film, and the filter coating is set on the photosensitive panel.

26. the photosensitive mould group as described in any one of claim 22-25, it is characterised in that: the photosensitive mould group is all one's life Object sensor chip.

27. a kind of display module, it is characterised in that: including a display device and such as any one of claim 22-26 institute The photosensitive mould group stated, and the photosensitive mould group is located at below the display device.

28. a kind of display module, it is characterised in that: including a display device and such as any one of claim 22-25 institute The photosensitive mould group stated, and the photosensitive mould group is located at below the display device；The display device includes a display panel, and The display panel has display area；Photosensitive panel in the photosensitive mould group is used to execute the display to the display panel The biological information sensing of the target object of any position in region；Alternatively, the photosensitive panel in the photosensitive mould group has Sensing region, and the shape of the sensing region is consistent with the shape of the display area, the size of the sensing region is greater than Or the size equal to the display area.

29. a kind of electronic equipment, including the photosensitive device as described in any one of claim 1-21, or such as claim Photosensitive mould group described in any one of 22-26, or the display module as described in claim 27 or 28.