CN103236238A - Pixel unit control circuit and display device - Google Patents
Pixel unit control circuit and display device Download PDFInfo
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- CN103236238A CN103236238A CN2013101507502A CN201310150750A CN103236238A CN 103236238 A CN103236238 A CN 103236238A CN 2013101507502 A CN2013101507502 A CN 2013101507502A CN 201310150750 A CN201310150750 A CN 201310150750A CN 103236238 A CN103236238 A CN 103236238A
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- 230000008859 change Effects 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 229920001621 AMOLED Polymers 0.000 abstract description 6
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- 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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
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- Computer Hardware Design (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention discloses a pixel unit control circuit and a display device provided with the pixel unit control circuit, belongs to the technical field of display, and solves the technical problem in the prior art that as Vth of the driving switch tube in each pixel unit is different, the display effect of the whole image is influenced. The pixel unit control circuit comprises a data input end, a power supply input end and a display control unit, wherein the display control unit comprises a driving switch tube, a reset module, a charging module and a switch module; the reset module is used for resetting the grid voltage of the driving switch tube; the charging module is used for supplementing an offset voltage for the grid of the driving switch tube, and the value of the offset voltage is equal to the difference between the electrical potential of the data input end and the threshold voltage of the driving switch tube; and the switch module is used for conducting the source electrode of the driving switch tube with the power supply input end and conducting the drain electrode of the driving switch tube with the organic light emitting diode. The pixel unit control circuit and the display device are applied to AMOLED (Active Matrix Organic Light Emitting Diode).
Description
Technical field
The invention belongs to the display technique field, the display device that is specifically related to a kind of pixel cell control circuit and is provided with this pixel cell control circuit.
Background technology
Active matrix organic LED panel (Active Matrix Organic Light Emitting Diode, be called for short AMOLED) have advantages such as energy consumption is low, production cost is low, the visual angle is wide, response speed is fast, so AMOLED has replaced traditional LCD gradually.Organic Light Emitting Diode (OLED) belongs to current drives, its principle of work be electronics and hole in conjunction with producing radiant light, just directly electric energy is converted into luminous energy, so need stable electric current control luminous when showing.
OLED drives by a driving switch pipe DT at present, and DT is the switching tube of P type normally.The grid of DT connects data input pin V
Data, source electrode connects the power input V of constant voltage
Dd, drain electrode connects OLED.V by source electrode
DdV with grid
DataBetween produce voltage difference V
GSThereby, make the OLED conducting of DT drain electrode, the electric current I of OLED
OLED=K (V
GS-V
Th)
2, V wherein
ThBe the threshold voltage of DT itself, K is a constant.
The inventor finds that there is following problem at least in prior art in realizing process of the present invention: owing to reasons such as the error of manufacturing process, device agings, can make the V of DT in each pixel cell
ThHave nothing in common with each other, therefore the electric current among each OLED is caused deviation in various degree, influence the display effect of entire image.
Summary of the invention
The display device that the embodiment of the invention provides a kind of pixel cell control circuit and has been provided with this pixel cell control circuit has solved in the prior art V of driving switch pipe in each pixel cell
ThHave nothing in common with each other, and influence the technical matters of the display effect of entire image.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The invention provides a kind of pixel cell control circuit, comprise data input pin, power input and indicative control unit, described indicative control unit comprises driving switch pipe, reseting module, charging module and switch module;
Described reseting module is used for the grid voltage zero clearing with described driving switch pipe;
Described charging module is used for after the grid voltage zero clearing of described driving switch pipe, and for the grid of described driving switch pipe charges into bucking voltage, the value of described bucking voltage equals threshold voltage poor of the electromotive force of described data input pin and described driving switch pipe;
Described switch module is used for making source electrode and the described power input conducting of described driving switch pipe after the grid of described driving switch pipe charges into bucking voltage, drain electrode and Organic Light Emitting Diode conducting.
Preferably, described reseting module comprises reset signal input end and first switching tube;
The grid of described driving switch pipe is by the described first switching tube ground connection;
Described reset signal input end is connected to the grid of described first switching tube.
Preferably, described charging module comprises charging signals input end, second switch pipe, the 3rd switching tube and first electric capacity;
The two ends of described second switch pipe are connected to the source electrode of described data input pin and described driving switch pipe respectively;
The two ends of described the 3rd switching tube are connected to grid and the drain electrode of described driving switch pipe respectively;
First end of described first electric capacity is connected to the grid of described driving switch pipe, the second end ground connection;
Described charging signals input end is connected to the grid of described second switch pipe and the grid of described the 3rd switching tube.
Preferably, described switch element comprises switching signal input end, the 4th switching tube and the 5th switching tube;
The two ends of described the 4th switching tube are connected to the source electrode of described power input and described driving switch pipe respectively;
The two ends of described the 5th switching tube are connected to drain electrode and the described Organic Light Emitting Diode of described driving switch pipe respectively;
Described switching signal input end is connected to the grid of described the 4th switching tube and the grid of described the 5th switching tube.
Further, this pixel cell control circuit also comprises the touch control module, and described touch control module comprises second electric capacity, coupled signal input end, replacement module and acquisition module;
Described coupled signal input end is connected to first end of described second electric capacity;
Described replacement module is used to second end input reset voltage of described second electric capacity;
Described acquisition module is used for gathering the touch signal that is produced by the change in voltage of described second electric capacity behind second end input reset voltage of described second electric capacity.
Preferably, described replacement module comprises reset signal input end and the 6th switching tube;
The two ends of described the 6th switching tube are connected to second end and the described data input pin of described second electric capacity respectively;
Described reset signal input end is connected to the grid of described the 6th switching tube.
Preferably, described acquisition module comprises first direction sweep signal input end, second direction sweep signal input end, the 7th switching tube and the 8th switching tube;
Described the 7th switching tube and described the 8th switching tube are connected between described coupled signal input end and the described second direction sweep signal input end;
The grid of described the 7th switching tube is connected to second end of described second electric capacity;
The grid of described the 8th switching tube is connected to described first direction sweep signal input end.
Preferably, described driving switch pipe is P type thin film transistor (TFT) (Thin Film Transistor is called for short TFT).
The present invention also provides a kind of display device, comprises above-mentioned pixel cell control circuit.
Compared with prior art, technique scheme provided by the present invention has following advantage: after the grid voltage zero clearing of reseting module with the driving switch pipe, be that the grid of driving switch pipe charges into bucking voltage by charging module, the value of this bucking voltage equals V
Data-V
Th, again by source electrode and the power input conducting of switch module with the driving switch pipe, drain electrode and OLED conducting.At this moment, the source electrode of driving switch pipe and the voltage difference V between the grid
GSBe V
Dd-(V
Data-V
Th)=V
Dd-V
Data+ V
ThSo, the inner electric current I that produces of OLED
OLED=K (V
GS-V
Th)
2=K (V
Dd-V
Data+ V
Th-V
Th)
2=K (V
Dd-V
Data)
2Therefore, technical scheme provided by the invention makes I
OLEDBe not subjected to V
ThInfluence, and only and V
DataRelevant, thus solved because the V of driving switch pipe in each pixel cell
ThHave nothing in common with each other, and influence the technical matters of the display effect of entire image.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below.
The synoptic diagram of the pixel cell control circuit that Fig. 1 provides for embodiments of the invention 1;
Another synoptic diagram of the pixel cell control circuit that Fig. 2 provides for embodiments of the invention 1;
The signal timing diagram of the pixel cell control circuit that Fig. 3 provides for embodiments of the invention 1;
The synoptic diagram of the pixel cell control circuit that Fig. 4 provides for embodiments of the invention 2;
Another synoptic diagram of the pixel cell control circuit that Fig. 5 provides for embodiments of the invention 2;
The clock signal figure of the pixel cell control circuit that Fig. 6 provides for embodiments of the invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
Embodiment 1:
As shown in Figure 1, the pixel cell control circuit that the embodiment of the invention provides can be applicable among the AMOLED, and this pixel cell control circuit comprises data input pin V
Data, power input V
DdAnd indicative control unit, indicative control unit comprises driving switch pipe DT, reseting module, charging module and switch module.
Reseting module is used for the grid voltage zero clearing with DT.Charging module is used for after the grid voltage zero clearing of DT, and for the grid of DT charges into bucking voltage, the value of bucking voltage equals data input pin V
DataElectromotive force and the threshold voltage V of DT
ThPoor, i.e. V
Data-V
ThSwitch module is used for making source electrode and the power input conducting of DT after the grid of DT charges into bucking voltage, drain electrode and OLED conducting simultaneously.
After the grid voltage zero clearing of reseting module with the driving switch pipe, be that the grid of driving switch pipe charges into bucking voltage by charging module, the value of this bucking voltage equals V
Data-V
Th, again by source electrode and the power input conducting of switch module with the driving switch pipe, drain electrode and OLED conducting.At this moment, the source electrode of driving switch pipe and the voltage difference V between the grid
GSBe V
Dd-(V
Data-V
Th)=V
Dd-V
Data+ V
ThSo, the inner electric current I that produces of OLED
OLED=K (V
GS-V
Th)
2=K (V
Dd-V
Data+ V
Th-V
Th)
2=K (V
Dd-V
Data)
2Therefore, technical scheme provided by the invention makes I
OLEDBe not subjected to V
ThInfluence, and only and V
DataRelevant, thus solved because the V of driving switch pipe in each pixel cell
ThHave nothing in common with each other, and influence the technical matters of the display effect of entire image.
Fig. 2 is the circuit diagram preferred embodiment of each module in the embodiment of the invention.
As shown in Figure 2, reseting module comprises reset signal input end and first switch transistor T 1.The grid of DT is by T1 ground connection; The reset signal input end is connected to the grid of T1.
Charging module comprises charging signals input end, second switch pipe T2, the 3rd switch transistor T 3 and first capacitor C 1.The two ends of T2 are connected to V respectively
DataSource electrode with DT; The two ends of T3 are connected to grid and the drain electrode of DT respectively; First end of C1 is connected to the grid of DT, the second end ground connection; The charging signals input end is connected to the grid of T2 and the grid of T3.
Preferably, switch element comprises switching signal input end, the 4th switch transistor T 4 and the 5th switch transistor T 5.The two ends of T4 are connected to V respectively
DdSource electrode with DT; The two ends of T5 are connected to drain electrode and the OLED of DT respectively; The switching signal input end is connected to the grid of T4 and the grid of T5.
As a preferred version, the DT in the present embodiment, and T1, T2, T3, T4, T5 are P type TFT.The principle of work of P type TFT is the low level conducting, convenient control; In manufacture process, can adopt low temperature polycrystalline silicon technology (Low Temperature Poly-silicon is called for short LTPS), thereby simplify its manufacture craft.Certainly, all or part of switching tube above-mentioned in the present embodiment also can replace with N-type TFT, and only need changing, corresponding control signal gets final product.
The signal timing diagram of the course of work of this pixel cell control circuit as shown in Figure 3.
In very first time section t1, the reset signal input end is low level, makes the T1 conducting, and T2, T3, T4, T5 disconnect.At this moment, the grid of DT just can pass through T1 ground connection, thereby makes the voltage of the grid of DT reduce to 0V.
In second time period t 2, the charging signals input end is low level, makes T2, T3 conducting, and T1, T4, T5 disconnect.V
DataElectric signal can pass through first end that T2, DT, T3 arrive C1 successively, and be the grid of C1(DT) charge.Because the condition of DT conducting is V
GS＞V
Th, and the voltage of DT source electrode is V
DataSo, when the grid voltage of DT rises to V
Data-V
ThThe time, the V of DT
GSWill be reduced to V
Th, this moment, DT will turn-off, and stop the gate charges to DT, and the grid voltage of DT will remain on V
Data-V
Th
In the 3rd time period t 3, switch element is low level, makes T4, T5 conducting, and T1, T2, T3 disconnect.At this moment, DT source electrode and V
DdConducting, drain electrode and OLED conducting, the then source electrode of DT and the voltage difference V between the grid
GS=V
Dd-(V
Data-V
Th)=V
Dd-V
Data+ V
ThSo, the inner electric current I that produces of OLED
OLED=K (V
GS-V
Th)
2=K (V
Dd-V
Data+ V
Th-V
Th)
2=K (V
Dd-V
Data)
2Therefore, in the pixel cell control circuit that the embodiment of the invention provides, I
OLEDBe not subjected to V
ThInfluence, and only and V
DataRelevant, thus solved because the V of DT in each pixel cell
ThHave nothing in common with each other, and influence the technical matters of the display effect of entire image.
Embodiment 2:
Present embodiment is substantially the same manner as Example 1, and improves on the basis of embodiment 1, as shown in Figure 4, also comprises the touch control module in the present embodiment.Touching control module and aforesaid indicative control unit can carry out work simultaneously, do not disturb mutually, and some element and input signal is public, below is elaborated.
Touch control module and comprise second capacitor C 2, coupled signal input end, replacement module and acquisition module.The coupled signal input end is connected to first end of C2.The replacement module is used to second end (touch-control sensing end) the input reset voltage of C2.Acquisition module is used for gathering the touch signal that is produced by the change in voltage of C2 behind second end input reset voltage of C2.
Fig. 5 is the circuit diagram preferred embodiment of each module in the embodiment of the invention.
As shown in Figure 5, replacement module comprises reset signal input end and the 6th switch transistor T 6.The two ends of T6 are connected to second end and the V of C2 respectively
DataThe reset signal input end is connected to the grid of T6.In the embodiment of the invention, the reset signal input end can be same input end with the reset signal input end.
Acquisition module comprises first direction sweep signal input end and second direction sweep signal input end, just directions X (laterally) sweep signal input end and Y-direction (vertically) sweep signal input end.Certainly, in other embodiments, also can be with second direction sweep signal input end as directions X sweep signal input end, with first direction sweep signal input end as Y-direction sweep signal input end.In the embodiment of the invention, directions X sweep signal input end can be same input end with the charging signals input end.
Acquisition module also comprises the 7th switching tube T7 and the 8th switching tube T8.T7 and T8 are connected between coupled signal input end and the Y-direction sweep signal input end; The grid of T7 is connected to second end of C2; The grid of T8 is connected to directions X sweep signal input end.
Preferably, the T6 in the present embodiment, T7, T8 also are P type TFT.Certainly, all or part of switching tube wherein also can replace with N-type TFT.
Indicative control unit in the pixel cell control circuit that present embodiment provides can carry out work simultaneously with the touch control module, and does not disturb mutually, and the signal timing diagram of its course of work as shown in Figure 6.
In very first time section t1, reset signal input end (reset signal input end) is low level, makes the T6 conducting, and T7, T8 disconnect.At this moment, by V
DataReset signal is provided, is second end (the touch-control sensing end just) charging of C2, the voltage that makes the touch-control sensing end is V
Data
In second time period t 2, directions X sweep signal input end (charging signals input end) is low level, makes the T8 conducting, and T6 disconnects, and the coupled signal input end is high level simultaneously.At this moment, the coupled signal input end provides voltage for first end of C2 on the one hand, forms coupling capacitance; Also serve as the source electrode that amplifies T7 on the other hand.
The touch of finger can directly cause the voltage of second end of C2 to reduce, the voltage that is the T7 grid reduces, make the T7 conducting, electric signal on the coupled signal input end will arrive the source electrode of T8 by T7 like this, and gathered by Y-direction sweep signal input end by T8, to determine the coordinate of finger touch position on Y-direction.Then, collect time of this touching signals according to Y-direction sweep signal input end, just can determine the coordinate of this touch location on directions X.In addition, T7 also has amplification, the electric signal on the coupled signal input end is amplified, so that the Y-direction sweep signal is to the collection of this signal.
In the 3rd time period t 3, all devices that touch control module all are in closed condition, and also be the glow phase of OLED this moment just, can not impact the luminous of OLED so touch control module.
Therefore, the pixel cell control circuit that the embodiment of the invention provides when having realized OLED control, has also been realized embedded touch control (in cell touch), and indicative control unit can not influence each other with the touch control module.
The embodiment that should be noted that the pixel cell control circuit in the above embodiment of the present invention only is most preferred embodiment, can also adopt other embodiment certainly.For example, the reseting module in the indicative control unit, and touch the module of supplementing with money in the control module, voltage resets or the circuit module of function of reset all can to replace with other common having.And for example, in the sampling module of embodiment 2, the series sequence of T7 and T8 also can be exchanged, etc.
Embodiment 3:
The present invention also provides a kind of display device, can be any product or parts with Presentation Function such as televisor, display, digital album (digital photo frame), mobile phone, panel computer specifically, and this display device comprises the pixel cell control circuit in above-described embodiment.
Because the display device that the embodiment of the invention provides has identical technical characterictic with the pixel cell control circuit that the invention described above embodiment provides, so also can produce identical technique effect, solves identical technical matters.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. pixel cell control circuit, it is characterized in that: comprise data input pin, power input and indicative control unit, described indicative control unit comprises driving switch pipe, reseting module, charging module and switch module;
Described reseting module is used for the grid voltage zero clearing with described driving switch pipe;
Described charging module is used for after the grid voltage zero clearing of described driving switch pipe, and for the grid of described driving switch pipe charges into bucking voltage, the value of described bucking voltage equals threshold voltage poor of the electromotive force of described data input pin and described driving switch pipe;
Described switch module is used for making source electrode and the described power input conducting of described driving switch pipe after the grid of described driving switch pipe charges into bucking voltage, drain electrode and Organic Light Emitting Diode conducting.
2. pixel cell control circuit according to claim 1, it is characterized in that: described reseting module comprises reset signal input end and first switching tube;
The grid of described driving switch pipe is by the described first switching tube ground connection;
Described reset signal input end is connected to the grid of described first switching tube.
3. pixel cell control circuit according to claim 1, it is characterized in that: described charging module comprises charging signals input end, second switch pipe, the 3rd switching tube and first electric capacity;
The two ends of described second switch pipe are connected to the source electrode of described data input pin and described driving switch pipe respectively;
The two ends of described the 3rd switching tube are connected to grid and the drain electrode of described driving switch pipe respectively;
First end of described first electric capacity is connected to the grid of described driving switch pipe, the second end ground connection;
Described charging signals input end is connected to the grid of described second switch pipe and the grid of described the 3rd switching tube.
4. pixel cell control circuit according to claim 1, it is characterized in that: described switch element comprises switching signal input end, the 4th switching tube and the 5th switching tube;
The two ends of described the 4th switching tube are connected to the source electrode of described power input and described driving switch pipe respectively;
The two ends of described the 5th switching tube are connected to drain electrode and the described Organic Light Emitting Diode of described driving switch pipe respectively;
Described switching signal input end is connected to the grid of described the 4th switching tube and the grid of described the 5th switching tube.
5. pixel cell control circuit according to claim 1, it is characterized in that: also comprise the touch control module, described touch control module comprises second electric capacity, coupled signal input end, replacement module and acquisition module;
Described coupled signal input end is connected to first end of described second electric capacity;
Described replacement module is used to second end input reset voltage of described second electric capacity;
Described acquisition module is used for gathering the touch signal that is produced by the change in voltage of described second electric capacity behind second end input reset voltage of described second electric capacity.
6. pixel cell control circuit according to claim 5, it is characterized in that: described replacement module comprises reset signal input end and the 6th switching tube;
The two ends of described the 6th switching tube are connected to second end and the described data input pin of described second electric capacity respectively;
Described reset signal input end is connected to the grid of described the 6th switching tube.
7. pixel cell control circuit according to claim 5, it is characterized in that: described acquisition module comprises first direction sweep signal input end, second direction sweep signal input end, the 7th switching tube and the 8th switching tube;
Described the 7th switching tube and described the 8th switching tube are connected between described coupled signal input end and the described second direction sweep signal input end;
The grid of described the 7th switching tube is connected to second end of described second electric capacity;
The grid of described the 8th switching tube is connected to described first direction sweep signal input end.
8. pixel cell control circuit according to claim 1, it is characterized in that: described driving switch pipe is P type thin film transistor (TFT).
9. a display device is characterized in that: comprise each described pixel cell control circuit of claim 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310150750.2A CN103236238B (en) | 2013-04-26 | 2013-04-26 | Pixel unit control circuit and display device |
| PCT/CN2013/079079 WO2014173021A1 (en) | 2013-04-26 | 2013-07-09 | Pixel unit control circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310150750.2A CN103236238B (en) | 2013-04-26 | 2013-04-26 | Pixel unit control circuit and display device |
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| CN103236238A true CN103236238A (en) | 2013-08-07 |
| CN103236238B CN103236238B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310150750.2A Active CN103236238B (en) | 2013-04-26 | 2013-04-26 | Pixel unit control circuit and display device |
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| CN (1) | CN103236238B (en) |
| WO (1) | WO2014173021A1 (en) |
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