TWM493129U - Pixel units and driving circuits - Google Patents

Abstract

A pixel unit is provided, comprising a light emission element and a driving circuit. The driving circuit comprises a first transistor, a first switch, a capacitor and a control module. The first switch has a first terminal coupled to a first source voltage, a second terminal coupled to a gate of the first transistor, and a gate received a first control signal. The capacitor is coupled between the gate and a second terminal of the first transistor. The control module is coupled between the second terminal of the first transistor and the light emission element. In addition, the control module is received a data voltage and the first control signal, and the control module determines whether or not to generate a reference current, which is related to the data voltage and is passing through the first transistor, according to at least the first control signal. The first transistor generates a driving current, which is equal to the reference current, according to the voltage between the gate and the second terminal of the first transistor.

Description

Pixel unit and drive circuit

The present invention relates to a pixel unit and a driving circuit, and more particularly to a pixel unit and a driving circuit of a light emitting element.

Nowadays, the use of light-emitting elements such as light-emitting diodes (LEDs) and organic light-emitting diodes (OLEDs) as light sources has become a fairly common application. The brightness of the light-emitting element is determined according to the driving current flowing therethrough. Therefore, for a driving circuit for driving the light-emitting element, the characteristics of the transistor for generating the driving current are often for the light-emitting element. Luminescence performance has the greatest impact.

Because there is a problem of uniformity in the process, a panel composed of a plurality of light-emitting elements and corresponding driving circuits, wherein the threshold voltages of the transistors for generating the driving current are different, resulting in a difference in driving current. In addition, with long-term operation and use, each of the transistors for generating the driving current has different degrees of deterioration, and the degree of offset of the threshold voltage is also inconsistent, which also causes a difference in driving current. These will cause unequal drive currents under the same data input, and the panel composed of these light-emitting elements and corresponding drive circuits will exhibit uneven brightness or branding.

The purpose of this creation is to provide an unactuated transistor The pixel unit and the driving circuit affected by the threshold voltage.

The created pixel unit includes a driving circuit and a light emitting element having a first end and a second end. The driving circuit includes a first transistor, a first switch, a capacitor, and a control module.

The first transistor includes a first end, a second end, and a control end. The first switch includes a first end electrically connected to a first power voltage, a second end electrically connected to the control end of the first transistor, and a control end receiving a first control signal, and according to the first control signal Control determines whether to output the first power voltage to the control terminal of the first transistor. The capacitor is electrically connected between the control end of the first transistor and the second end.

The control module is electrically connected between the second end of the first transistor and the first end of the light emitting component, and receives a data voltage and a first control signal, and determines whether the data is generated according to at least the control of the first control signal The voltage passes through a reference current of the first transistor such that the voltage across the control terminal and the second terminal of the first transistor is related to the reference current. The first transistor generates a driving current equal to the magnitude of the reference current according to the voltage across the control terminal and the second terminal.

The present invention generates a driving current related to the data voltage by the control module based on at least the first control signal, without being affected by the threshold voltage of the driving transistor (ie, the first transistor).

701~710‧‧‧ drive circuit

801~810‧‧‧Control Module

901~910‧‧‧Lighting elements

C1‧‧‧ capacitor

Data‧‧‧data voltage

IREF‧‧‧reference current

P1‧‧‧Compensation phase

P2‧‧‧Lighting stage

S1‧‧‧ first control signal

S2‧‧‧ second control signal

SW1‧‧‧ first switch

SW2‧‧‧second switch

SW3‧‧‧ third switch

T1‧‧‧first transistor

T2‧‧‧second transistor

VDD‧‧‧first supply voltage

VL‧‧‧reference voltage

VSS‧‧‧second supply voltage

1 is a circuit diagram showing a first preferred embodiment of the present pixel unit; FIG. 2 is a timing diagram, and FIG. 1 is a first preferred embodiment; FIG. 3 is a circuit diagram illustrating the first The preferred embodiment is in a compensation stage; FIG. 4 is a circuit diagram illustrating the first preferred embodiment in an illumination stage; FIG. 5 is a circuit diagram illustrating one of the present pixel units. 2 is a timing chart, and FIG. 6 is a second preferred embodiment; FIG. 7 is a circuit diagram showing a third preferred embodiment of the present pixel unit; FIG. FIG. 9 is a circuit diagram illustrating a fourth preferred embodiment of the present pixel unit; FIG. 10 is a timing diagram, and FIG. 9 illustrates the four comparisons. FIG. 11 is a circuit diagram showing a fifth preferred embodiment of the present pixel unit; FIG. 12 is a timing diagram, and FIG. 11 is a fifth preferred embodiment; FIG. 13 is a circuit diagram. , a sixth preferred embodiment of the present pixel unit; FIG. 14 Is a timing diagram, and FIG. 13 illustrates a sixth preferred embodiment; Figure 15 is a circuit diagram showing a seventh preferred embodiment of the present pixel unit; Figure 16 is a timing diagram, and Figure 15 is a seventh preferred embodiment; Figure 17 is a circuit diagram illustrating the creation An eighth preferred embodiment of the pixel unit; FIG. 18 is a timing diagram, and FIG. 17 is a first preferred embodiment; FIG. 19 is a circuit diagram illustrating a ninth preferred embodiment of the present pixel unit. 20 is a timing chart, and FIG. 19 is a ninth preferred embodiment; FIG. 21 is a circuit diagram showing a tenth preferred embodiment of the present pixel unit; and FIG. 22 is a timing chart. The auxiliary diagram 21 illustrates the tenth preferred embodiment.

Referring to FIG. 1, a first preferred embodiment of the present pixel unit includes a light-emitting element 901 and a driving circuit 701. The light-emitting element 901 has a first end and a second end, and the driving circuit 701 includes a first electric circuit. The crystal T1, a first switch SW1, a capacitor C1, and a control module 801.

The first transistor T1 includes a first end, a second end, and a control end for receiving a first power supply voltage VDD. The A and B points are defined as a control end and a second end of the first transistor T1, respectively. The first switch SW1 includes a first end electrically connected to the first power voltage VDD, a second end electrically connected to the control end of the first transistor T1, and a control end receiving a first control signal S1(N), and Determining whether to output the first power voltage VDD to the first according to the control of the first control signal S1(N) The control terminal of the transistor T1. Wherein, in the display panel of the array consisting of the plurality of pixel units of the present creation, N represents any column in the display panel, for example, the first control signal S1(2) represents the first control signal of the second column. The capacitor C1 is electrically connected between the control end and the second end of the first transistor T1. The second end of the light emitting element 901 receives a second power voltage VSS.

The control module 801 is electrically connected to the second end of the first transistor T1 and the light emitting element Between the first end of the 901, and receiving a data voltage Data and a first control signal S1 (N), and at least according to the control of the first control signal S1 (N), determining whether to generate a data voltage related to Data and passing through the first The reference current of the transistor T1 is such that the voltage across the control terminal and the second terminal of the first transistor T1 is related to the reference current, and the first transistor T1 is generated and referenced according to the voltage across the control terminal and the second terminal. A drive current of equal magnitude.

The control module 801 includes a second switch SW2, a second transistor T2, and a The third switch SW3. The second switch SW2 has a first end electrically connected to the second end of the first transistor T1, a second end, and a control end receiving the first control signal S1(N), and according to the first control signal S1 (N Control, switching between conduction and non-conduction. The second transistor T2 has a first end and a control end electrically connected to the second end of the second switch SW2, and a second end receiving the data voltage Data. The third switch SW3 has a first end electrically connected to the second end of the first transistor T1, a second end electrically connected to the first end of the light emitting element 901, and a control for receiving a second control signal S2(N) And, according to the control of the second control signal S2(N), to determine whether to output the driving current from the first transistor T1 to the light-emitting element 901.

In this embodiment, the light emitting element 901 is an organic light emitting diode, and the first electricity The crystal T1, the second transistor T2, the first switch SW1, the second switch SW2, and the third switch SW3 can be implemented by any N-type transistor (NMOS).

Fig. 2 is a timing chart, and Fig. 1 illustrates a first preferred embodiment. Pixel unit According to the first and second control signals S1(N), S2(N), operating in a compensation phase P1 and an illumination phase P2, and for convenience of description, in the following illustration, the symbol is represented by a fork symbol or the transistor is not conductive. .

Figure 3 is a circuit diagram illustrating the aspect of the first preferred embodiment in the compensation phase P1. Referring to FIG. 2 and FIG. 3, in the compensation phase P1, the first control signal S1(N) is at a logic high level, and the first and second switches SW1 and SW2 are turned on, and the voltage V _A at the point _A is VDD. The second control signal S2(N) is at a logic low level, so that the third switch SW3 is not turned on. The second transistor T2 which is based on cross voltage V _GS of the control terminal and the second _terminal, generating ₂ related to reference current I _REF voltage Data_N data, and so the magnitude of the reference current I _REF and a current through the first transistor T1 of the I ₁ and a current I ₂ passing through the second transistor T2 are equal in magnitude (i.e., I _REF = I ₁ = I ₂ ). The capacitor C1 stores the voltage across the control terminal and the second terminal V _{GS,1 of the} first transistor T1. The equations for currents I ₁ and I ₂ are as follows: I ₂ = K ( V _{GS , 2} - V _{TH , 2} ) ² = K ( V _{GS , 1} - V _{TH , 1} ) ² = I ₁ ---Formula 1 Where K is the transistor constant, V _{TH, 1} is the threshold voltage of the first transistor T1, and V _{TH, 2} is the threshold voltage of the second transistor T2. In this embodiment, we derive from Equation 1 that V _{GS , 2} - V _{TH , 2} = V _{GS , 1} - V _{TH , 1} --- Equation 2 is derived from Equation 2: V _{GS , 1} = V _{GS , 2} - V _{TH , 2} + V _{TH , 1} --- Equation 3 Since V _{GS, 1} is the voltage V _A at point _A minus the voltage V _B at point _B (ie V _{GS , 1} = V _A - V _B In the compensation phase P1, the voltage V _A is VDD, and the voltage V _A and the voltage V _B are given by the formula 2, and the following equation can be obtained: V _{GS , 2} - V _{TH , 2} = V _A - V _B - V _{TH , 1} = VDD - V _B - V _{TH , 1} --- Equation 4 is derived from Equation 4: V _B =- V _{GS , 2} + V _{TH , 2} + VDD - V _{TH ,1} .

Figure 4 is a circuit diagram showing the aspect of the first preferred embodiment in the illumination phase P2. Referring to FIG. 2 and FIG. 4, in the light-emitting phase P2, the first control signal S1(N) is at a logic low level, so that the first and second switches SW1, SW2 are not turned on. The second control signal S2(N) is at a logic high level to turn on the third switch SW3. At this time, the voltage V _{B '} at point _B is VSS+V _DRIVE , and V _DRIVE is the on-voltage of the light-emitting element 901. Because the voltage across the storage capacitor C1 is V _{GS, 1,} such that a first transistor T1 P2 stage in emission cross voltage V _{GS, 1} 'is equal to a first transistor T1 cross voltage V _GS at the compensation stage _{P1, 1.} Its mechanism of capacitor C1 the point B of the voltage variation △ V _B is coupled to a point A, therefore, the point A in the emission phase P2, the voltage V _{A 'may} be expressed _{as: V A' = V A +} △ V B = VDD +△ V _B ---Formula 5 where the voltage change at point B Δ V _B can be expressed as: △ V _B = V _B '- V _B = VSS + V _DRIVE - V _B --- Equation 6 will formula six After entering Equation 5, you can get: V _A '= VDD + VSS + V _DRIVE - V _B .

Due to the voltage across the V _{GS , 1} ' is the voltage V _{A '} at point _A minus the voltage V _{B '} at point _B (ie V _{GS , 1} '= V _A '- V _B '), the voltage V _{A '} and the voltage V Substituting the value of _B' , after simplification, the following formula can be obtained: V _{GS , 1} '= VDD - V _B --- Equation 7 Substituting the value of voltage V _B into formula VII, the following formula can be obtained: V _{GS , 1} '= V _{GS , 2} - V _{TH , 2} + V _{TH , 1} --- Equation 8 From Equation 3 and Equation 8, it can be proved that the voltage across the first transistor T1 in the illuminating phase P2 is equal to V _GS,1' The voltage across the first transistor T1 at the compensation phase P1 is V _GS,1 .

The first transistor T1 generates a drive current I _DRIVE according to the voltage across the voltage V _{GS, 1 '} , and the drive current I _DRIVE is supplied to the light-emitting element 901 via the turned-on third switch SW3. The drive current I _DRIVE can be derived from the following formula: I _DRIVE = K ( V _{GS , 1} '- V _{TH , 1} ) ² = K ( V _{GS , 2} - V _{TH , 2} + V _{TH , 1} - V _{TH , 1} ) ² = K ( V _{GS , 2} - V _{TH , 2} ) ² = I ₁ = I _REF --- Equation 9 From Equation 9, the drive current I _DRIVE and the reference current I _REF are equal in magnitude and related to the second The difference between the voltage V _{GS,2 of the} crystal T2 at the compensation phase P1 and the threshold voltage V _TH,2 . The second terminal voltage of the second transistor T2 in the compensation phase P1 is the data voltage Data_N. Therefore, the driving current I _{DRIVE is} related to the data voltage Data_N, but the driving current I _DRIVE and the threshold voltage V _{TH,1 of the} first transistor. Nothing.

Compared with the prior art, the present invention generates the reference current I _REF by the second transistor T2 and makes the driving current I _DRIVE equal to the reference current I _REF such that the driving current I _DRIVE and the threshold voltage V of the first transistor T1 _{TH, 1 is} irrelevant, so that the threshold voltage V _TH,1 of the first transistor T1 of different pixel units is different due to the uniformity of the process of the first transistor T1, resulting in the same data voltage Data, there drive current I _dRIVE unequal phenomenon, thereby improving unevenness in brightness of the panel by the pixel units consisting of mark or question.

In the following embodiments, for convenience of description, the reference current I _REF and the drive current I _{DRIVE are} not shown in the figure, but the definitions of the reference current I _REF and the drive current I _DRIVE are respectively shown in FIGS. 3 and 4 . Show.

Referring to FIG. 5, a second preferred embodiment of the present pixel unit is substantially The first preferred embodiment is similar in that the second transistor T2 of the control module 802 has a first end electrically connected to the second end of the second switch SW2, a control terminal receiving the data voltage Data, and receiving a second end of the second control signal S2(N).

Fig. 6 is a timing chart, and Fig. 5 illustrates a second preferred embodiment. Referring to FIG. 5 and FIG. 6, with the similar derivation from the first preferred embodiment, the driving current I _DRIVE in the lighting phase P2 is equal to the reference current _IREF in the compensation phase, and the driving current I _DRIVE can be expressed as: I _DRIVE = I _REF = K ( V _{GS , 2} - V _{TH , 2} ) ² --- Equation 10 The voltage across the voltage V _{GS,2 of the} second transistor T2 during the compensation phase P1 is related to the data voltage Data_N. As can be seen from the equation 10, the drive current I _{DRIVE is} related to the data voltage Data_N, but the drive current I _{DRIVE is} independent of the threshold voltage V _{TH,1 of the} first transistor, and has the same advantages as the first preferred embodiment.

Referring to FIG. 7, a third preferred embodiment of the present pixel unit is substantially similar to the first preferred embodiment. The difference is that the second transistor T2 of the control module 803 has an electrical connection to the second switch. A first end of the second end of the SW2, a control end receiving the data voltage Data, and a second end receiving the first control signal S1(N+1) of the adjacent another column.

Fig. 8 is a timing chart, and Fig. 7 illustrates a third preferred embodiment. Referring to FIG. 7 and FIG. 8, with the similar derivation from the first preferred embodiment, the driving current I _DRIVE in the lighting phase P2 is equal to the reference current I _REF in the compensation phase, and the driving current I _DRIVE can be expressed as : I _DRIVE = I _REF = K ( V _{GS , 2} - V _{TH , 2} ) ² ......... Equation 11 where the voltage across the voltage V _{GS,2 of the} second transistor T2 during the compensation phase P1 is related to the data voltage DATA_N . As can be seen from Equation 11, the drive current I _{DRIVE is} related to the data voltage DATA_N, but the drive current I _{DRIVE is} independent of the threshold voltage V _{TH,1 of the} first transistor, and has the same advantages as the first preferred embodiment.

Referring to FIG. 9, a fourth preferred embodiment of the present pixel unit is substantially similar to the first preferred embodiment. The difference is that the second transistor T2 of the control module 804 has an electrical connection to the second switch. A first end of the second end of the SW2, a control end receiving the data voltage Data, and a second end receiving a reference voltage VL.

Fig. 10 is a timing chart, and Fig. 9 illustrates a fourth preferred embodiment. Referring to FIG. 9 and FIG. 10, with the similar derivation from the first preferred embodiment, in the lighting phase P2, the driving current I _DRIVE is equal to the reference current I _REF in the compensation phase, and the driving current I _DRIVE can be expressed as : I _DRIVE = I _REF = K ( V _{GS , 2} - V _{TH , 2} ) ² ... Equation 12 where the voltage across the voltage V _{GS,2 of the} second transistor T2 during the compensation phase P1 is related to the data voltage DATA_N . It can be seen from Equation 12 that the drive current I _{DRIVE is} related to the data voltage DATA_N, but the drive current I _DRIVE has the same advantages as the first preferred embodiment regardless of the threshold voltage V _{TH,1 of the} first transistor.

Referring to FIG. 11, a fifth preferred embodiment of the present pixel unit is substantially similar to the first preferred embodiment. The difference is that the third switch SW3 of the control module 805 is a P-type transistor ( a PMOS) having a first end electrically connected to the second end of the first transistor T1, a second end electrically connected to the first end of the light emitting element 905, and a control end receiving the first control signal S1(N) And according to the control of the first control signal S1(N), to decide whether to output the driving current from the first transistor T1 to the light-emitting element 905.

Fig. 12 is a timing chart, and Fig. 11 illustrates a fifth preferred embodiment. Referring to FIG. 11 and FIG. 12, in the compensation phase P1, the first control signal S1(N) is at a logic high level, the first and second switches SW1, SW2 are turned on, and the third switch SW3 is not turned on. In the light-emitting phase P2, the first control signal S1(N) is at a logic low level, so that the first and second switches SW1, SW2 are not turned on, and the third switch SW3 is turned on.

Referring to FIG. 13, a sixth preferred embodiment of the present pixel unit is substantially similar to the third preferred embodiment. The difference is that the third switch SW3 of the control module 806 is a P-type transistor ( PMOS) a first end electrically connected to the second end of the first transistor T1, a second end electrically connected to the first end of the light emitting element 906, and a control end receiving the first control signal S1(N), and according to the Control of the control signal S1(N) to determine whether to output the drive current from the first transistor T1 to the light-emitting element 906.

Fig. 14 is a timing chart, and Fig. 13 illustrates a sixth preferred embodiment. See picture 13 and FIG. 14, in the compensation phase P1, the first control signal S1(N) is at a logic high level, the first and second switches SW1, SW2 are turned on, and the third switch SW3 is not turned on. In the light-emitting phase P2, the first control signal S1(N) is at a logic low level, so that the first and second switches SW1, SW2 are not turned on, and the third switch SW3 is turned on.

Referring to Figure 15, a seventh preferred embodiment of the present pixel unit is substantially Similar to the fourth preferred embodiment, the difference is that the third switch SW3 of the control module 807 is a P-type transistor (PMOS) and has a first end electrically connected to the second end of the first transistor T1. a second end of the first end of the light-emitting element 907, and a control end of the first control signal S1(N), and according to the control of the first control signal S1(N), to determine whether it will come from the first The drive current of a transistor T1 is output to the light-emitting element 907.

Fig. 16 is a timing chart, and Fig. 15 illustrates a seventh preferred embodiment. See picture 15 and FIG. 16, in the compensation phase P1, the first control signal S1(N) is at a logic high level, the first and second switches SW1, SW2 are turned on, and the third switch SW3 is not turned on. In the light-emitting phase P2, the first control signal S1(N) is at a logic low level, so that the first and second switches SW1, SW2 are not turned on, and the third switch SW3 is turned on.

Referring to Figure 17, an eighth preferred embodiment of the present pixel unit is substantially Similar to the first preferred embodiment, the difference is that the control module 808 omits the third switch SW3 (see FIG. 1), and the second switch SW2 has a second end electrically connected to the first transistor T1 and the light-emitting element 908. a first end, a second end of the first end, and a control end receiving the first control signal S1(N), and switching between conducting and non-conducting according to the control of the first control signal S1(N) .

Figure 18 is a timing chart, and Figure 17 illustrates an eighth preferred embodiment. Referring to FIG. 17 and FIG. 18, the pixel unit operates according to the first control signal S1(N) in a compensation phase P1 and an illumination phase P2, and in the compensation phase P1, the first end and the second end of the light-emitting element 908 The voltage across the voltage needs to be less than the turn-on voltage V _{DRIVE of the} light-emitting element, ie V _B -VSS < V _DRIVE .

Referring to Figure 19, a ninth preferred embodiment of the present pixel unit is substantially Similar to the third preferred embodiment, the difference is that the control module 809 omits the third switch SW3 (see FIG. 7), and the second switch SW2 has a second end electrically connected to the first transistor T1 and the light-emitting element 909. a first end, a second end of the first end, and a control end receiving the first control signal S1(N), and switching between conducting and non-conducting according to the control of the first control signal S1(N) .

Fig. 20 is a timing chart, and Fig. 19 illustrates a ninth preferred embodiment. Referring to FIG. 19 and FIG. 20, the pixel unit operates according to the first control signal S1(N) and the first control signal S1(N+1) of another adjacent column, in a compensation phase P1 and an illumination phase P2, and During the compensation phase P1, the voltage across the first end and the second end of the light-emitting element 909 needs to be smaller than the turn-on voltage V _{DRIVE of the} light-emitting element, that is, V _B -VSS < V _DRIVE .

Referring to Figure 21, a tenth preferred embodiment of the present pixel unit is substantially Similar to the fourth preferred embodiment, the difference is that the control module 8 omits the third switch SW3 (see FIG. 9), and the second switch SW2 has a second end electrically connected to the first transistor T1 and the light-emitting element 910. a first end, a second end, and a control end of the first control signal S1(N) Switching between conduction and non-conduction according to the control of the first control signal S1(N).

Fig. 22 is a timing chart, and Fig. 21 illustrates a tenth preferred embodiment. Referring to FIG. 21 and FIG. 22, the pixel unit operates according to the first control signal S1(N) in a compensation phase P1 and an illumination phase P2, and in the compensation phase P1, the first end and the second end of the light-emitting element 910 The voltage across the voltage needs to be less than the turn-on voltage V _{DRIVE of the} light-emitting element, ie V _B -VSS < V _DRIVE .

It can be seen from the above embodiments that the control module I can generate the driving current I _DRIVE related to the data voltage Data by at least the first control signal S1(N), without being affected by the threshold voltage V _{TH of the} first transistor T1 _. The impact of ₁ . That is to say, the threshold voltage of the driving transistors of different pixel units is not different due to the uniformity of the process of driving the transistor (the first transistor T1 in the above embodiment), resulting in the same data voltage being applied. However, there is a phenomenon that the corresponding driving currents are not equal, thereby improving the uneven brightness or branding of the panel composed of the pixel units.

701‧‧‧ drive circuit

801‧‧‧Control Module

901‧‧‧Lighting elements

C1‧‧‧ capacitor

Data‧‧‧data voltage

S1‧‧‧ first control signal

S2‧‧‧ second control signal

SW1‧‧‧ first switch

SW2‧‧‧second switch

SW3‧‧‧ third switch

T1‧‧‧first transistor

T2‧‧‧second transistor

VDD‧‧‧first supply voltage

VSS‧‧‧second supply voltage

Claims (15)

A pixel unit includes a light-emitting element having a first end and a second end, wherein the pixel unit further comprises: a driving circuit, comprising: a first transistor, including a first end a second end, and a control end; a first switch comprising a first end electrically connected to a first supply voltage, a second end electrically connected to the control end of the first transistor, and a first receiving Controlling a control terminal, and determining whether to output the first power voltage to the control end of the first transistor according to the control of the first control signal; a capacitor electrically connecting the control end of the first transistor and the first And a control module electrically connected between the second end of the first transistor and the first end of the light emitting element, and receiving a data voltage and the first control signal, and at least according to the first Controlling the control signal to determine whether a reference current related to the data voltage and passing through the first transistor is generated, so that a voltage across the control terminal and the second terminal of the first transistor is related to the reference current, the first a transistor according to its Cross voltage between system and second ends to generate a current equal to the reference magnitude of the driving current. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch having a first end electrically connected to the second end of the first transistor, a second end, and a control end receiving the first control signal, and according to the control of the first control signal, Switching between conduction and non-conduction; a second transistor having a first end and a control end electrically connected to the second end of the second switch, and a second end receiving the data voltage; and a third switch a first end electrically connected to the second end of the first transistor, a second end electrically connected to the first end of the light emitting element, and a control end receiving a second control signal, and according to the second Control of the control signal to determine whether to output a drive current from the first transistor to the light emitting element. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a first end, a second end, and a control end receiving the first control signal, and switching between conducting and non-conducting according to the control of the first control signal; a second transistor having Electrically connecting a first end of the second end of the second switch, a control end receiving the data voltage, and a second end receiving a second control signal; and a third switch having a first end electrically connected to the second end of the first transistor, a second end electrically connected to the first end of the light emitting element, and a control end receiving the second control signal, and Controlling whether the driving current from the first transistor is output to the light emitting element is controlled according to the control of the second control signal. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a first end, a second end, and a control end receiving the first control signal, and switching between conducting and non-conducting according to the control of the first control signal; a second transistor having a first end electrically connected to the second end of the second switch, a control end receiving the data voltage, and a second end receiving the first control signal of the other column; and a third switch having an electrical connection a first end of the second end of the transistor, a second end electrically connected to the first end of the light emitting element, and a control end receiving a second control signal, and according to the control of the second control signal, It is decided whether or not the driving current from the first transistor is output to the light emitting element. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch having a first end electrically connected to the second end of the first transistor, a second end, and a control end receiving the first control signal, and according to the control of the first control signal, Switching between conduction and non-conduction; a second transistor having a first end electrically connected to the second end of the second switch, a control end receiving the data voltage, and a second end receiving a reference voltage; a third switch having a first end electrically connected to the second end of the first transistor, a second end electrically connected to the first end of the light emitting element, and a control end receiving a second control signal, and Controlling whether the driving current from the first transistor is output to the light emitting element is controlled according to the control of the second control signal. According to the pixel unit of claim 2, 3, 4 or 5, wherein, according to the first and second control signals, operating in a compensation phase and an illumination phase: in the compensation phase, the first control The signal turns on the first and second switches, the second control signal causes the third switch to be non-conducting, so that the second transistor generates the reference current related to the data voltage, and the first transistor is based on the reference current Adjusting a voltage across the control terminal and the second terminal, the capacitor storing the voltage across the voltage as a storage voltage; and during the lighting phase after the compensation phase, the first control signal causes the first and second switches not to Turning on, the second control signal makes the third open Turning off, the first transistor generates the driving current according to the storage voltage, and the driving current supplies the light emitting element via the third switch that is turned on. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a first end, a second end, and a control end receiving the first control signal, and switching between conducting and non-conducting according to the control of the first control signal; a second transistor having Electrically connecting a first end and a control end of the second end of the second switch, and receiving a second end of the data voltage; and a third switch having a second end electrically connected to the first transistor a first end, a second end electrically connected to the first end of the light emitting element, and a control end receiving the first control signal, and according to the control of the first control signal, to determine whether the first power is to be The driving current of the crystal is output to the light emitting element. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a first end, a second end of the second end, and a control for receiving the first control signal And switching between conducting and non-conducting according to the control of the first control signal; a second transistor having a first end electrically connected to the second end of the second switch, and a control end receiving the data voltage And receiving a second end of the first control signal of the other column; and a third switch having a first end electrically connected to the second end of the first transistor, and a first end electrically connected to the first end of the light emitting element The second end and a control end receiving the first control signal, and according to the control of the first control signal, determine whether to output a driving current from the first transistor to the light emitting element. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a first end, a second end, and a control end receiving the first control signal, and switching between conducting and non-conducting according to the control of the first control signal; a second transistor having Electrically connecting a first end of the second end of the second switch, a control end receiving the data voltage, and a second end receiving a reference voltage; and a third switch having an electrical connection to the first transistor a first end of the second end, a second end electrically connected to the first end of the light emitting element, and a control end receiving the first control signal, and according to the first control signal Control to determine whether to output a drive current from the first transistor to the light emitting element. The pixel unit of claim 7, 8 or 9 wherein, according to the first control signal, operating in a compensation phase and an illumination phase: during the compensation phase, the first control signal causes the first Conducting with the second switch, and causing the third switch to be non-conducting, the second transistor generates the reference current related to the data voltage, and the first transistor adjusts between the control end and the second end according to the reference current Transmitting, the capacitor stores the voltage across the voltage as a storage voltage; and in the light emitting phase after the compensation phase, the first control signal causes the first and second switches to be non-conducting, and the third switch is turned on, The first transistor generates the driving current according to the storage voltage, and the driving current supplies the light emitting element via the third switch that is turned on. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a second end and a first end of the first end of the light emitting element, a second end, and a control end receiving the first control signal, and according to the control of the first control signal, between the conducting and the non-conducting Switching; and a second transistor having a first end and a control end electrically connected to the second end of the second switch, and a second end receiving the data voltage. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a second end and a first end of the first end of the light emitting element, a second end, and a control end receiving the first control signal, and according to the control of the first control signal, between the conducting and the non-conducting Switching; and a second transistor having a first end electrically connected to the second end of the second switch, a control end receiving the data voltage, and a second end receiving the first control signal of the other column. The pixel unit of claim 1, wherein the first end of the first transistor receives the first power voltage, and the control module comprises: a second switch electrically connected to the first transistor a second end and a first end of the first end of the light emitting element, a second end, and a control end receiving the first control signal, and according to the control of the first control signal, between the conducting and the non-conducting Switching; and a second transistor having a first end electrically connected to the second end of the second switch, a control end receiving the data voltage, and a second end receiving a reference voltage. According to the pixel unit of claim 11, 12 or 13, the second end of the light-emitting element receives a second power supply voltage, wherein, according to the first control signal, operating in a compensation phase and an illumination phase: In the compensation phase, the first control signal turns on the first and second switches, so that the second transistor generates the reference current related to the data voltage, and the first transistor adjusts its control according to the reference current. a voltage across the terminal and the second end, the capacitor stores the voltage across the voltage as a storage voltage, and a difference between a voltage of the second terminal of the first transistor and the second power voltage is less than a turn-on voltage of the light emitting device; The first control signal causes the first and second switches to be non-conducting during the illuminating phase after the compensating phase, and the first transistor generates the driving current to supply the illuminating element according to the stored voltage. A driving circuit, comprising: a first transistor, comprising a first end, a second end, and a control end; a first switch comprising a first electrically connected first power supply voltage a second end of the control end of the first transistor, and a control end receiving a first control signal, and determining whether to output the first power voltage to the first control signal according to the control of the first control signal a control terminal of the transistor; a capacitor electrically connected between the control end and the second end of the first transistor; and a control module electrically connected to the second end of the first transistor and receiving a data voltage And the first control signal, and at least according to the control of the first control signal, determining whether to generate a voltage related to the data and Passing the reference current of the first transistor, the voltage across the control terminal and the second terminal of the first transistor is related to the reference current, and the first transistor is based on a voltage across the control terminal and the second terminal To generate a drive current equal to the magnitude of the reference current.