CN108320690A - Display panel and its detection method, display device - Google Patents
Display panel and its detection method, display device Download PDFInfo
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- CN108320690A CN108320690A CN201810102273.5A CN201810102273A CN108320690A CN 108320690 A CN108320690 A CN 108320690A CN 201810102273 A CN201810102273 A CN 201810102273A CN 108320690 A CN108320690 A CN 108320690A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Abstract
A kind of display panel of present invention offer and its detection method, display device, belong to display technology field.The present invention display panel include：M pixel detection circuit group, control unit and N number of timing unit；M >=2, N >=2；Wherein, N number of timing unit is connect with control unit, and is worked one by one under the control of the control unit；The scan line that the i-th row pixel detection circuit in each pixel detection circuit group is connected, connect with i-th of timing unit, wherein 1≤i≤N；Each timing unit, in reset phase, input service level signal to reset corresponding photosensitive unit by the reset signal inputted in read line so that corresponding first switch unit is opened line by line to scan line connected to it；And in sample phase, to scan line connected to it, input service level signal to read the electric signal that photosensitive unit is generated so that corresponding first switch unit is opened by read line line by line.
Description
Technical field
The invention belongs to display technology fields, and in particular to a kind of display panel and its detection method, display device.
Background technology
As shown in Figure 1, providing in the prior art a kind of with multiple passive type pixel detection electricity being arranged in array
The display panel on road.Wherein, the pixel detection circuit being located at a line connects same scan line gate line, is located at same
The pixel detection circuit connection same read line read line of row.For each pixel detection circuit, it includes a light
An electric diode PD and switching transistor T；Wherein, when photodiode by PD to when illumination, then will produce photoelectric current, adopting
The sample stage controls switching transistor T by scan line gate line and opens, and is read produced by photodiode PD by read line
Photoelectric current, so that the information that control unit detects pixel detection circuit is analyzed.
In order to provide the detection speed of each pixel detection circuit on display panel, therefore can be in the way of roller
Carry out the control of sequential.Specifically, as shown in Figures 2 and 3, time t1To open first switch transistor T1To two pole of the first photoelectricity
Pipe PD1It is reset and (is reset to the reset voltage in read line), first switch transistor T1After shutdown, the first photodiode
PD1It proceeds by light and accumulates and continue Tint, subsequent t2Be then adjacent next line pixel detection circuit reset and again into
Row light accumulates, and t3It is then again to first switch transistor T1It opens and carries out readings, t4It is then to second switch transistor T2
It opens and carries out readings.But due to connecting up, scan line and read line overlap mutually, in addition the unlatching loaded in scan line
Voltage is often very big, therefore, when the pixel detection circuit of the second row is in reset phase namely t2Moment, on the second horizontal scanning line
After the cut-in voltage of application, by the capacitance C between the second horizontal scanning line and read lineGR2It is coupled in read line, and next then
It is t3Moment, i.e. first switch transistor T1It opens and carries out readings, due to t2Moment and t3Time interval between moment is very short,
At this point, capacitance CGR2
First switch transistor T will be passed through after being coupled in read line1Influence the first photodiode PD1。
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art, a kind of display panel and its inspection are provided
Survey method, display device, to prevent when pixel detection circuit is reset, to the sense in one-row pixels detection circuit thereon
Light unit impacts.
Technical solution is a kind of display panel used by solving present invention problem, including arranged in a crossed manner a plurality of is swept
Retouch line and a plurality of read line；The crossover location of the scan line and the read line is provided with pixel detection circuit；Wherein, institute
It includes first switch unit to state pixel detection circuit, and the photosensitive unit connected with the first switch unit；Wherein, it is located at
With scan line described in the first switch unit connection same in the pixel detection circuit of a line；Described in same row
Read line described in first switch unit connection same in pixel detection circuit；The display panel is divided into M pixel inspection
Slowdown monitoring circuit group；Each pixel detection circuit group includes N row pixel detection circuits；The display panel further includes：Control is single
First and N number of timing unit；M >=2, N >=2；Wherein,
N number of timing unit is connect with described control unit, and is carried out one by one under the control of described control unit
Work；
The scan line that pixel detection circuit is connected described in the i-th row in each pixel detection circuit group, with i-th
A timing unit connection, wherein 1≤i≤N；
Each timing unit, in reset phase, input service level to be believed line by line to scan line connected to it
Number, so that the corresponding first switch unit is opened, by the reset signal that is inputted in read line to corresponding described photosensitive
Unit is reset；And in sample phase, to scan line connected to it input service level signal line by line, so that
The corresponding first switch unit is opened, and the electric signal that the photosensitive unit is generated is read by read line.
Preferably, in every read line and right between the pixel detection circuit group adjacent with arbitrary two
The position answered is both provided with second switch unit；Wherein,
When being reset to pixel detection circuit described in the i-th row in k-th of pixel detection circuit group, control bit
Each second switch unit shutdown between -1 and k-th pixel detection circuit group of kth；Wherein, 2≤k≤
M。
It may further be preferable that each second switch list between the two adjacent pixel detection circuit groups
Member connection same thread switching control.
It may further be preferable that the second switch unit includes second transistor；Wherein,
The first pole and the second pole of the second transistor are connected in the read line, and control pole connects the switch control
Line processed.
Preferably, N number of timing unit is integrated in same timing controller.
Preferably, the display panel further includes：Multiple operational amplifiers；Wherein,
The positive input connection reset voltage end of each operational amplifier；Connect a read line and capacitance
First end, output end connect control unit and capacitance second end；The operational amplifier is used for read line institute is defeated
The signal gone out is amplified, so that the information that described control unit detects the pixel detection circuit is identified.
Preferably, the first switch unit includes the first transistor；Wherein,
First pole of the first transistor connects the photosensitive unit, and the second pole connects the read line, and control pole connects
Connect the scan line.
Preferably, the photosensitive unit includes：Photodiode；Wherein,
First pole of the photodiode connects the first switch unit, and the second pole connects reversed bias voltage end.
Technical solution is a kind of detection method of above-mentioned display panel used by solving present invention problem, packet
It includes：
The step of N number of timing unit N number of timing unit being controlled by control unit；And by described
Timing unit control is connected thereto the step of pixel detection circuit is worked；
It is described to be connected thereto the step of pixel detection circuit is worked by timing unit control and include：
Reset phase, by timing unit to scan line connected to it input service level signal line by line, so that accordingly
The first switch unit open, weight is carried out to the corresponding photosensitive unit by the reset signal that is inputted in read line
It sets；
Sample phase, by timing unit to scan line connected to it input service level signal line by line, so that accordingly
The first switch unit open, the electric signal that the photosensitive unit is generated is read by read line.
Technical solution is a kind of display device used by solving present invention problem comprising above-mentioned display panel.
The present invention has the advantages that：
Since the present embodiment display panel includes multiple timing units, and control unit control sequential unit carries out one by one
Work, in this way since, compared with the prior art for, the two adjacent scanned time intervals of scan line are extended, to effective
Avoid scan line and read line it is overlapping caused by parasitic capacitance, when to a certain horizontal scanning line input service level signal,
The operation level signal is coupled to read line by parasitic capacitance, influences the pixel that the lastrow scan line of the scan line is connected
Photosensitive unit in detection circuit.
Description of the drawings
Fig. 1 is the structural schematic diagram of the existing display panel with pixel detection circuit；
Fig. 2 is the structural schematic diagram of two pixel detection circuits in existing two adjacent rows；
Fig. 3 is the working timing figure of two pixel detection circuits of Fig. 2；
Fig. 4 is the structural schematic diagram of the display panel with pixel detection circuit of the embodiment of the present invention 1；
Fig. 5 is the simplification figure of the display panel of Fig. 4；
Fig. 6 is the working timing figure of the pixel detection circuit in the display panel of Fig. 5；
Fig. 7 is a kind of structural schematic diagram of preferred display panel of the embodiment of the present invention 1.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Present invention is further described in detail for formula.
Embodiment 1：
As shown in figure 4, the present embodiment provides a kind of display panel, including multi-strip scanning line gate line arranged in a crossed manner
With a plurality of read line read line；The crossover location of scan line gate line and read line read line are provided with pixel
Detection circuit；Wherein, pixel detection circuit includes first switch unit, and the photosensitive unit connected with first switch unit；
Wherein, it is located at the first switch unit connection same scan line gate line in the pixel detection circuit of a line；Positioned at same
First switch unit connection same read line read line in the pixel detection circuit of one row.
Display panel in the present embodiment is divided into M pixel detection circuit group Zone；Each pixel detection circuit group
Zone includes N row pixel detection circuits；The display panel includes specifically：Control unit and N number of timing unit；M >=2, N >=
2。
Wherein, N number of timing unit is connect with control unit, and is worked one by one under the control of the control unit.
The scan line gate line that the i-th row pixel detection circuit in each pixel detection circuit group Zone is connected,
It is connect with i-th of timing unit, wherein 1≤i≤N.
Each timing unit is used in reset phase, and to scan line gate line connected to it, input service is electric line by line
Ordinary mail number, so that corresponding first switch unit is opened, by the reset signal that is inputted on read line read line to corresponding
Photosensitive unit is reset；And it is used in sample phase, to scan line gate line input services line by line connected to it
Level signal reads the electricity that photosensitive unit is generated so that corresponding first switch unit is opened by read line read line
Signal.
In order to become apparent from the display panel structure in the present embodiment, with M=5, N=2；Have to above-mentioned display panel
Body explanation.
As it can be seen in figures 5 and 6, display panel includes control unit, 2 timing units, respectively the first timing unit, second
Timing unit；5 pixel detection circuit groups Zone, each pixel detection circuit group Zone include 2 row pixel detection circuits；Its
In, the scan line gate line connections first that are connect with the first row pixel detection circuit in each pixel detection circuit group Zone
Timing unit；The scan line gate line being connect with the second row pixel detection circuit in each pixel detection circuit group Zone connect
Connect the second timing unit；That is, gate line1-1, gate line2-1, gate line3-1, gate line4-1, gate
Line5-1 the first timing units of connection；gate line1-2、gate line2-2、gate line3-2、gate line4-2、
Gate line5-2 the second timing units of connection.It is for controlling the first timing unit and the second timing unit for control unit
It works, also just says one by one, after one work is completed in the first timing unit and the second timing unit, another one is
It works.It is illustrated so that the first timing unit is first worked as an example below.
With gate line1-1, gate line2-1, gate line3-1, gate line4-1, gate line5-1
When the pixel detection circuit connected is worked, the first stage is reset phase, the first timing unit to gate line1-1,
Gate line2-1, gate line3-1, gate line4-1, gate line5-1 are progressively scanned, specifically, when to the
When one horizontal scanning line gate line namely gate line1-1 is scanned, believe for gate line1-1 input service level
Number, the switch unit in the pixel detection circuit being connect with gate line1-1 is opened, at this point it is possible to pass through read line read
Line inputs reset signal, and the photosensitive unit in pair pixel detection circuit being connect with gate line1-1 is reset；According to
Same mode is sequentially completed and is connect with gate line2-1, gate line3-1, gate line4-1, gate line5-1
Pixel detection circuit resetting.Later, into second stage namely sample phase, and it should be noted that each
Row pixel detection circuit can then carry out light accumulation to the photosensitive unit in the row pixel detection circuit between sample phase, in this way with
Come, the photoelectric current that photosensitive unit is generated can be read in sample phase.
Next, to gate line1-1, gate line2-1, gate line3-1, gate line4-1, gate
The sample phase for the pixel detection circuit that line5-1 is connected illustrates.First timing unit is to gate line1-1, gate
Line2-1, gate line3-1, gate line4-1, gate line5-1 are progressively scanned, specifically, when to the first row
It is gate line1-1 input service level signals when scan line gate line namely gate line1-1 are scanned, with
Switch unit in the pixel detection circuit of gate line1-1 connections is opened, at this point, can then pass through read line read
Line reads the photoelectric current that the photosensitive unit in the pixel detection circuit being connect with gate line1-1 is generated；According to same
Mode is sequentially completed the pixel being connect with gate line2-1, gate line3-1, gate line4-1, gate line5-1
The sampling of detection circuit.
To sum up, by the first timing unit complete to gate line1-1, gate line2-1, gate line3-1,
Gate line4-1, gate line5-1 are scanned, with end pair and gate line1-1, gate line2-1, gate line3-
1, the resetting and sampling for the pixel detection circuit that gate line4-1, gate line5-1 are connected；It later, then can be according to upper
Identical method is stated, by the second timing unit, to gate line1-2, gate line2-2, gate line3-2, gate
Line4-2, gate line5-2 scan, with pair with gate line1-2, gate line2-2, gate line3-2, gate
The pixel detection circuit that line4-2, gate line5-2 are connected carries out resetting line by line；After reset, again to gate
Line1-2, gate line2-2, gate line3-2, gate line4-2, gate line5-2 scanning, with pair and gate
The pixel detection electricity that line1-2, gate line2-2, gate line3-2, gate line4-2, gate line5-2 are connected
Road carries out sampling line by line.
It can be seen that gate line2-1 input service level signals, with pair with the horizontal scanning line
It, be in gate line1-1, gate line2-1, gate when the pixel detection circuit of gate line connections is reset
After the sample phase for the pixel detection circuit that line3-1, gate line4-1, gate line5-1 are connected is completed, in this way
Since, scanned moment of gate line1-1 time interval between the two with the gate line2-1 scanned moment,
Much larger than in the prior art gate line1-1 it is scanned after at once to the time interval of gate line2-1, therefore,
The high level inputted when gate line2-1 are scanned, even if passing through gate line2-1 and the reading arranged in a crossed manner with it
Line read line, which are formed by parasitic capacitance and are coupled on read line read line, will not influence to connect with gate line1-1
Photosensitive unit in the pixel detection circuit connect.
Wherein, N number of timing unit in the present embodiment display panel is integrated in same timing controller, in this way can be with
So that the structure of display panel is simple.
Wherein, the display panel of the present embodiment further includes：Multiple operational amplifier OP.Specifically, each operational amplifier
The positive input connection reset voltage end VCM of OP；The first end of the read line read line and capacitance C are connected, it is defeated
Outlet connects the second end of control unit and capacitance C；What operational amplifier OP was used to be exported the read line read line
Signal is amplified, so that the information that described control unit detects the pixel detection circuit is identified.
Wherein, the first switch unit in the display panel of the present embodiment includes the first transistor T.Specifically, first is brilliant
The first pole of body pipe T connects the photosensitive unit, and the second pole connects the read line read line, swept described in control pole connection
Retouch line gate line.
The first transistor T can be P-type transistor, can also be N-type transistor；When the first transistor T is P-type transistor
When, when the operation level inputted on scan line gate line is low level, the first transistor T conductings；When the first transistor T is N
When transistor npn npn, when the operation level inputted on scan line gate line is high level, the first transistor T conductings.
Wherein, the photosensitive unit in the display panel of the present embodiment includes：Photodiode PD；Specifically, the photoelectricity two
The first pole of pole pipe PD connects the switch unit, and the second pole connects reversed bias voltage end.
Since the present embodiment display panel includes multiple timing units, and control unit control sequential unit carries out one by one
Work, in this way since, compared with the prior art for, extend the two adjacent scanned time intervals of scan line gate line,
To effectively avoid the overlapping generated parasitic capacitances of scan line gate line and read line read line, to certain a line
When scan line gate line input service level signals, which is coupled to read line read by parasitic capacitance
Line influences photosensitive in the pixel detection circuit that the lastrow scan line gate line of scan line gate line are connected
Unit.
Further, on the basis of above-mentioned display panel, a kind of preferred realization method is additionally provided in the present embodiment,
As shown in fig. 7, the display panel may include not only each structure of above-mentioned display panel, specifically, also read at every
Corresponding position on line read line and between the pixel detection circuit group Zone adjacent with arbitrary two, is both provided with second and opens
Close unit；Wherein, when being reset to the i-th row pixel detection circuit in k-th of pixel detection circuit group Zone, control bit
In each second switch unit shutdown of kth -1 between k-th of pixel detection circuit group Zone；Wherein, 2≤k≤
M。
Wherein, each second switch unit connection between the two adjacent pixel detection circuit Zone groups
Same thread switching control.The convenient control to second switch unit in this way, and convenient for wiring.
Wherein, second switch unit includes second transistor M；Wherein, the first pole of second transistor M is connected with the second pole
On the read line read line, control pole connects the thread switching control ctrl.
Second transistor M can be P-type transistor, can also be N-type transistor；When second transistor M is P-type transistor
When, when the operation level inputted on thread switching control ctrl is low level, second transistor M conductings；When second transistor M is N
When transistor npn npn, when the operation level inputted on thread switching control ctrl is high level, second transistor M conductings.
Include equally control unit, 2 timing units, respectively the first timing unit, the second sequential list with display panel
Member；For 5 pixel detection circuit groups Zone, each pixel detection circuit group Zone include 2 row pixel detection circuits.
Specifically, when being the 2nd row pixel detection circuit in the 2nd pixel detection circuit group Zone by the second timing unit
The scan line gate line input service level signals connected, while so that the row pixel detection circuit is reset, control
It makes on the read line read line between the 1st pixel detection circuit group Zone and the 2nd pixel detection circuit group Zone
Switch unit disconnect, to prevent high level signal on the scan line gate line that the 2nd row pixel detection circuit connected from passing through
Scan line gate line and read line read line are formed by parasitic capacitance and are coupled to read line read line, with right
Photosensitive unit impacts in 1st pixel detection circuit group Zone.
Correspondingly, providing a kind of detection method of above-mentioned display panel in the present embodiment, this method includes：
The step of N number of timing unit N number of timing unit being controlled by control unit；And by described
Timing unit control is connected thereto the step of pixel detection circuit is worked；
Wherein, being connected thereto the step of pixel detection circuit is worked by timing unit control includes：
Reset phase, by timing unit to scan line gate line connected to it input service level signals line by line,
So that the corresponding first switch unit is opened, by the reset signal that is inputted on read line read line to corresponding institute
Photosensitive unit is stated to be reset.
Sample phase, by timing unit to scan line gate line connected to it input service level signals line by line,
So that the corresponding first switch unit is opened, the electricity that the photosensitive unit is generated is read by read line read line
Signal.
Include control unit, 2 timing units, respectively the first timing unit, the second timing unit with display panel；5
For a pixel detection circuit group Zone, each pixel detection circuit group Zone include 2 row pixel detection circuits, to this implementation
Detection method in example illustrates.Wherein, it is connect with the first row pixel detection circuit in each pixel detection circuit group Zone
Scan line gate line the first timing units of connection；With the second row pixel detection electricity in each pixel detection circuit group Zone
Scan line gate line the second timing units of connection of road connection；That is, gate line1-1, gate line2-1, gate
Line3-1, gate line4-1, gate line5-1 the first timing units of connection；gate line1-2、gate line2-2、
Gate line3-2, gate line4-2, gate line5-2 the second timing units of connection.It is for controlling for control unit
What the first timing unit and the second timing unit worked one by one, it also just says, in the first timing unit and the second timing unit
After middle one work is completed, another one just works.It is illustrated so that the first timing unit is first worked as an example below.
With gate line1-1, gate line2-1, gate line3-1, gate line4-1, gate line5-1
When the pixel detection circuit connected is worked, the first stage is reset phase, the first timing unit to gate line1-1,
Gate line2-1, gate line3-1, gate line4-1, gate line5-1 are progressively scanned, specifically, when to the
When one horizontal scanning line gate line namely gate line1-1 is scanned, believe for gate line1-1 input service level
Number, the switch unit in the pixel detection circuit being connect with gate line1-1 is opened, at this point it is possible to pass through read line read
Line inputs reset signal, and the photosensitive unit in pair pixel detection circuit being connect with gate line1-1 is reset；According to
Same mode is sequentially completed and is connect with gate line2-1, gate line3-1, gate line4-1, gate line5-1
Pixel detection circuit resetting.Later, into second stage namely sample phase, and it should be noted that each
Row pixel detection circuit can then carry out light accumulation to the photosensitive unit in the row pixel detection circuit between sample phase, in this way with
Come, the photoelectric current that photosensitive unit is generated can be read in sample phase.
Next, to gate line1-1, gate line2-1, gate line3-1, gate line4-1, gate
The sample phase for the pixel detection circuit that line5-1 is connected illustrates.First timing unit is to gate line1-1, gate
Line2-1, gate line3-1, gate line4-1, gate line5-1 are progressively scanned, specifically, when to the first row
It is gate line1-1 input service level signals when scan line gate line namely gate line1-1 are scanned, with
Switch unit in the pixel detection circuit of gate line1-1 connections is opened, at this point, can then pass through read line read
Line reads the photoelectric current that the photosensitive unit in the pixel detection circuit being connect with gate line1-1 is generated；According to same
Mode is sequentially completed the pixel inspection being connect with gateline2-1, gate line3-1, gate line4-1, gate line5-1
The sampling of slowdown monitoring circuit.
To sum up, by the first timing unit complete to gate line1-1, gate line2-1, gate line3-1,
Gate line4-1, gate line5-1 are scanned, with end pair and gate line1-1, gate line2-1, gate line3-
1, the resetting and sampling for the pixel detection circuit that gate line4-1, gate line5-1 are connected；It later, then can be according to upper
Identical method is stated, by the second timing unit, to gate line1-2, gate line2-2, gate line3-2, gate
Line4-2, gate line5-2 scan, with pair with gate line1-2, gate line2-2, gate line3-2, gate
The pixel detection circuit that line4-2, gate line5-2 are connected carries out resetting line by line；After reset, again to gate
Line1-2, gate line2-2, gate line3-2, gate line4-2, gate line5-2 scanning, with pair and gate
The pixel detection electricity that line1-2, gate line2-2, gate line3-2, gate line4-2, gate line5-2 are connected
Road carries out sampling line by line.
It can be seen that gate line2-1 input service level signals, with pair with the horizontal scanning line
It, be in gate line1-1, gate line2-1, gate when the pixel detection circuit of gate line connections is reset
After the sample phase for the pixel detection circuit that line3-1, gate line4-1, gate line5-1 are connected is completed, in this way
Since, scanned moment of gate line1-1 time interval between the two with the gate line2-1 scanned moment,
Much larger than in the prior art gate line1-1 it is scanned after at once to the time interval of gate line2-1, therefore,
The high level inputted when gate line2-1 are scanned, even if passing through gate line2-1 and the reading arranged in a crossed manner with it
Line read line, which are formed by parasitic capacitance and are coupled on read line read line, will not influence to connect with gate line1-1
Photosensitive unit in the pixel detection circuit connect.
Preferably, when in the present embodiment display panel may include not only each structure of above-mentioned display panel, further include
Corresponding position on every read line read line and between the pixel detection circuit group Zone adjacent with arbitrary two, is all provided with
When being equipped with second switch unit, the detection method of the display panel in the present embodiment further includes：To k-th of pixel detection circuit
When the i-th row pixel detection circuit in group Zone is reset, control is located at kth -1 and k-th of pixel detection circuit group
Each second switch unit shutdown between Zone；Wherein, 2≤k≤M.
Include equally control unit, 2 timing units, respectively the first timing unit, the second sequential list with display panel
Member；For 5 pixel detection circuit groups Zone, each pixel detection circuit group Zone include 2 row pixel detection circuits.
Specifically, when being the 2nd row pixel detection circuit in the 2nd pixel detection circuit group Zone by the second timing unit
The scan line gate line input service level signals connected while so that the row pixel detection circuit is reset, are led to
Cross read line read of the control between the 1st pixel detection circuit group Zone and the 2nd pixel detection circuit group Zone
Switch unit on line disconnects, to prevent the upper high level letters of scan line gate line that the 2nd row pixel detection circuit is connected
Number being formed by parasitic capacitance by scan line gate line and read line read line is coupled to read line read
Line, to be impacted to photosensitive unit in the 1st pixel detection circuit group Zone.
Embodiment 3：
The present embodiment provides a kind of display devices comprising the display panel in embodiment 1.Therefore, the present embodiment is aobvious
The display effect of showing device is more preferable.
Wherein, display device can be liquid crystal display device or el display device, such as liquid crystal display panel, electronics
Paper, oled panel, mobile phone, tablet computer, television set, display, laptop, Digital Frame, navigator etc. are any to be had
The product or component of display function.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of display panel, including multi-strip scanning line arranged in a crossed manner and a plurality of read line；In the scan line and the reading
The crossover location of line taking is provided with pixel detection circuit；Wherein, the pixel detection circuit includes first switch unit, Yi Jihe
The photosensitive unit of the first switch unit connection；Wherein, it is located at the first switch in the pixel detection circuit of a line
Unit connects scan line described in same；First switch unit connection in the pixel detection circuit of same row is same
Read line described in item；It is characterized in that, the display panel is divided into M pixel detection circuit group；Each pixel detection
Circuit group includes N row pixel detection circuits；The display panel further includes：Control unit and N number of timing unit；M >=2, N >=2；
Wherein,
N number of timing unit is connect with described control unit, and is worked one by one under the control of described control unit；
The scan line that pixel detection circuit is connected described in the i-th row in each pixel detection circuit group, with i-th of institute
State timing unit connection, wherein 1≤i≤N；
Each timing unit, in reset phase, to scan line connected to it input service level signal line by line, with
So that the corresponding first switch unit is opened, by the reset signal that is inputted in read line to the corresponding photosensitive unit into
Row resetting；And in sample phase, to scan line connected to it input service level signal line by line, so that accordingly
The first switch unit is opened, and the electric signal that the photosensitive unit is generated is read by read line.
2. display panel according to claim 1, which is characterized in that in every read line and with arbitrary two-phase
Corresponding position between the adjacent pixel detection circuit group, is both provided with second switch unit；Wherein,
When being reset to pixel detection circuit described in the i-th row in k-th of pixel detection circuit group, control is located at the
K-1 each second switch unit shutdowns between k-th of pixel detection circuit group；Wherein, 2≤k≤M.
3. display panel according to claim 2, which is characterized in that be located at the two adjacent pixel detection circuit groups it
Between each second switch unit connect same thread switching control.
4. display panel according to claim 3, which is characterized in that the second switch unit includes second transistor；
Wherein,
The first pole and the second pole of the second transistor are connected in the read line, and control pole connects the switch control
Line.
5. display panel according to claim 1, which is characterized in that N number of timing unit is integrated in same sequential control
In coremaking piece.
6. display panel according to claim 1, which is characterized in that further include：Multiple operational amplifiers；Wherein,
The positive input connection reset voltage end of each operational amplifier；Connect the of one article of read line and capacitance
One end, output end connect the second end of control unit and capacitance；What the operational amplifier was used to be exported the read line
Signal is amplified, so that the information that described control unit detects the pixel detection circuit is identified.
7. display panel according to claim 1, which is characterized in that the first switch unit includes the first transistor；
Wherein,
First pole of the first transistor connects the photosensitive unit, and the second pole connects the read line, and control pole connects institute
State scan line.
8. display panel according to claim 1, which is characterized in that the photosensitive unit includes：Photodiode；Its
In,
First pole of the photodiode connects the first switch unit, and the second pole connects reversed bias voltage end.
9. a kind of detection method of the display panel of any one of such as claim 1-8, which is characterized in that including：
The step of N number of timing unit N number of timing unit being controlled by control unit；And passing through the sequential
Unit control is connected thereto the step of pixel detection circuit is worked；
It is described to be connected thereto the step of pixel detection circuit is worked by timing unit control and include：
Reset phase, by timing unit to scan line connected to it input service level signal line by line, so that corresponding institute
First switch unit opening is stated, the corresponding photosensitive unit is reset by the reset signal inputted in read line；
Sample phase, by timing unit to scan line connected to it input service level signal line by line, so that corresponding institute
First switch unit opening is stated, the electric signal that the photosensitive unit is generated is read by read line.
10. a kind of display device, which is characterized in that including the display panel described in any one of claim 1-8.
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| CN108320690B (en) | 2021-04-09 |
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