WO2005055427A1 - クロックドインバータ回路、ラッチ回路、シフトレジスタ回路、表示装置の駆動回路、表示装置 - Google Patents
クロックドインバータ回路、ラッチ回路、シフトレジスタ回路、表示装置の駆動回路、表示装置 Download PDFInfo
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- WO2005055427A1 WO2005055427A1 PCT/JP2004/017529 JP2004017529W WO2005055427A1 WO 2005055427 A1 WO2005055427 A1 WO 2005055427A1 JP 2004017529 W JP2004017529 W JP 2004017529W WO 2005055427 A1 WO2005055427 A1 WO 2005055427A1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
- H03K3/356—Bistable circuits
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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]
- 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]
- G09G3/3266—Details of drivers for scan electrodes
-
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
- H03K19/094—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using field-effect transistors
- H03K19/096—Synchronous circuits, i.e. using clock signals
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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
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0404—Matrix technologies
- G09G2300/0408—Integration of the drivers onto the display substrate
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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
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0404—Matrix technologies
- G09G2300/0417—Special arrangements specific to the use of low carrier mobility technology
Definitions
- the present invention relates to a clocked inverter circuit, a latch circuit, a shift register circuit, a drive circuit of a display device, and a display device, and can be applied to, for example, a flat display device using an organic EL (Electro Luminescence) element.
- a series circuit is formed by a switch circuit including a pair of transistors that switch the operation in a complementary manner, an output of a connection midpoint of the series circuit is output to an inverter circuit, and an input signal is input to one end of the series circuit.
- a switch circuit including a pair of transistors that switch the operation in a complementary manner
- an output of a connection midpoint of the series circuit is output to an inverter circuit
- an input signal is input to one end of the series circuit.
- drive signals are sequentially transferred by a shift register circuit provided in a vertical drive circuit to drive each pixel drive signal.
- a shift register circuit is formed by serially connecting latch circuits that latch and output an input signal on the basis of a clock, as disclosed in Japanese Patent Application Laid-Open No. 5-241201, for example. It has been done.
- FIG. 1 is a connection diagram showing this latch circuit.
- This latch circuit 1 has a P-channel MOS transistor TR1, TR2 and an N-channel MOS transistor TR3, TR4 connected in series between a power supply Vcc and ground, as shown in FIG. 2 (A).
- the input signal IN is input from the previous stage to the power supply Vcc and the transistors TR1 and TR4 on the ground side, and the inverted signals of the clock CK and the clock CK are input to the inner transistors TR2 and TR3, respectively.
- the clock CKX is input (Fig. 2 (B) and (C)), and the transistors TR1 to TR4
- a clock dump circuit 2 that operates based on the clock CK is formed.
- MOS Transistors TR7 and TR8 are connected in series between the power supply Vcc and ground, and the opposite transistors TR1 to TR4 are connected to the inner transistors TR6 and TR7, respectively.
- the clock CK is input, whereby the transistors TR5 to TR8 form a clocked inverter circuit 3 that operates based on the clock CKX having the opposite polarity to the clock CK.
- Latch circuit 1 is composed of P-channel MOS transistor TR 9 and N-channel M
- the outputs of these clocked inverter circuits 2 and 3 are input to an inverter circuit 4 in which an OS transistor TR10 is connected in series between the power supply Vcc and ground, and the output of the inverter circuit 4 is clocked. Feedback to the input of the
- a latch circuit for latching the input signal IN by the clock CK is formed, and the output OUT (FIG. 2 (D)) of the inverter circuit 4 is output to the next stage.
- the shift register circuit includes a latch circuit 1 that latches the input signal IN at the rising edge of the clock CK and outputs the latched input signal IN to the next stage, and a connection between the latch CK 1 and the clocks CK and CKX.
- a driving signal generated by a timing generator is supplied to the first-stage latch circuit, whereby the driving signal is sequentially transferred.
- a drive signal for each pixel is generated.
- the latch circuit that constitutes such a shift register circuit has a drawback that it is difficult to make it using a TFT (Thin Film Transistor) made of a mono-reflective silicon that can be formed on a glass substrate. That is, a TFT (Thin Film Transistor) made of amorphous silicon has a drawback that the mobility is as low as about lZ100 compared to a transistor made of single crystal silicon or polysilicon, and a P-channel transistor cannot be formed.
- TFT Thin Film Transistor
- a pixel portion in which these pixels are arranged is formed on a glass substrate, and is formed in a separate process using single crystal silicon, polysilicon, or the like.
- the drive circuit is It is formed so as to be connected to the pixel portion on the plate.
- a pixel portion 12 in which pixels are arranged in a matrix is formed on a glass substrate 13.
- an integrated circuit composed of vertical drive circuits 14A and 14B for sequentially driving each pixel of the pixel portion 12 line by line using single crystal silicon, polysilicon or the like is formed by a shift register by a separate process.
- the vertical drive circuits 14A and 14B are formed around the glass substrate 13 together with the horizontal drive circuit 15 integrated circuits for setting the gradation of each pixel. It has been made.
- a drive circuit using such a shift register circuit can be formed by using TFTs made of amorphous silicon, this type of drive circuit and each pixel can be integrally formed on a glass substrate. It is considered that the manufacturing process of the flat display device can be simplified. For this purpose, a clocked inverter circuit and a latch circuit that operate with only a single-channel transistor that can be created by TFT using amorphous silicon are required. Disclosure of the invention
- the present invention has been made in view of the above points, and includes a clocked inverter circuit, a latch circuit, a shift register circuit using this latch circuit, a drive circuit of a display device, and a display device that operate only with a single-channel transistor. It is a proposal.
- the present invention is applied to a clock inverter circuit in which all transistors are transistors of the same channel, and a series of transistors that switch operation complementarily by a clock are connected in series.
- a first series circuit for inputting an input signal at one end, and a first inverter circuit of one set of transistors for connecting a connection midpoint of the first series circuit to a gate of one of the transistors.
- a second inverter circuit including a set of transistors for inputting an output signal whose signal level changes in accordance with a connection midpoint output of the first series circuit to the other end of the first series circuit.
- one set of transformers that switch the operation complementarily by a clock A first series circuit in which transistors are connected in series and an input signal is input to one end, and a first inverter formed by a set of transistors that connects a connection midpoint of the first series circuit to a gate of one transistor. Circuit and a second inverter circuit composed of a set of transistors that inputs an output signal whose signal level changes in accordance with the output of the middle point of connection of the first series circuit to the other end of the first series circuit.
- all the transistors are formed as N-channel transistors, and the output of the first series circuit is set to correspond to the input signal by turning on the switch circuit at one end,
- the output of the first series circuit can be set so as to maintain the output of the first series circuit by the ON operation of the switch circuit on the other end, and the ON state of the switch circuit on the one end side allows the output of the first series circuit to be set.
- the signal level of the signal can be held subsequently.
- a clock inverter circuit can be formed by forming all transistors of an N-channel type.
- the present invention is applied to a latch circuit in which all transistors are transistors of the same channel, and a series of transistors that switch operation complementarily by a clock are connected in series, and an input signal is input to one end.
- One series circuit a first inverter circuit with a set of transistors connecting the connection midpoint of the first series circuit to the gate of one transistor, and a connection midpoint output of the first series circuit.
- a second inverter circuit including a set of transistors for inputting an output signal whose signal level changes to the other end of the first series circuit.
- the present invention is applied to a shift register circuit in which drive signals are sequentially transferred by a latch circuit.
- the latch circuit all transistors are formed by transistors of the same channel, and operate in a complementary manner by a capacitor.
- a pair of transistors are connected in series, a first series circuit that inputs an input signal to one end, and a pair of transistors that connect the connection midpoint of the first series circuit to the gate of one transistor.
- a first inverter circuit using a transistor and an output signal whose signal level changes in accordance with the output of the middle point of connection of the first series circuit are input to the other end of the first series circuit. And an inverter circuit.
- the present invention is applied to a driving circuit of a display device in which pixels are arranged in a matrix, and a driving signal is sequentially converted by a shift register circuit including a latch circuit.
- the latch circuit consists of a series of transistors, all of which are formed by transistors of the same channel, and whose operation is complementarily switched by a switch.
- a first series circuit that inputs an input signal to one end; a first inverter circuit that includes a pair of transistors that connects a connection midpoint of the first series circuit to a gate of one transistor; and a first series circuit.
- An output signal whose signal level changes in accordance with the output of the middle point of the circuit is provided at the other end of the first series circuit with a second inverter circuit of a set of transistors which is manually operated.
- the present invention is applied to a display device in which pixels are arranged in a matrix, and a drive signal is sequentially transferred by a shift register circuit including a latch circuit to generate a pixel drive signal.
- Transistors are formed from transistors of the same channel, and they are switched in a complementary manner by a clock.
- a pair of transistors are connected in series, and an input signal is input at one end.
- a first inverter circuit composed of a set of transistors connecting the connection midpoint to the gate of one transistor, and an output signal whose signal level changes in response to the connection midpoint output of the first series circuit are output to the first And a second inverter circuit having one transistor connected to the other end of the series circuit.
- a latch circuit and a shift register circuit can be formed by, for example, forming all transistors of N-channel type. According to the configuration of the present invention, such a shift circuit can be formed. A drive circuit of the display device using a register circuit can be formed. According to the structure of the present invention, a display device using such a shift register circuit can be provided. According to the present invention, it is possible to obtain a clogged inverter circuit, a latch circuit, a shift register circuit using the latch circuit, a driving circuit of a display device using the shift register circuit, and a display device using only the single-channel transistor.
- FIG. 1 is a connection diagram showing a clocked inverter circuit applied to a vertical drive circuit of a conventional flat display device.
- FIG. 2 is a time chart for explaining the operation of the clocked inverter circuit of FIG.
- FIG. 3 is a block diagram showing a configuration of a conventional flat display device.
- FIG. 4 is a block diagram showing a flat display device according to Embodiment 1 of the present invention.
- FIG. 5 is a connection diagram showing a vertical drive circuit in the flat display device of FIG.
- FIG. 6 is a timing chart for explaining the operation of the latch circuit in the vertical drive circuit of FIG.
- FIG. 7 is a connection diagram for explaining the operation of the latch circuit in the vertical drive circuit of FIG.
- FIG. 8 is a connection diagram for explaining the operation subsequent to FIG.
- FIG. 9 is a connection diagram showing a vertical drive circuit of a flat display device according to Embodiment 2 of the present invention.
- FIG. 10 is a connection diagram showing a vertical door dividing circuit of the flat display device according to Embodiment 3 of the present invention.
- FIG. 4 is a block diagram showing a flat display device according to Embodiment 1 of the present invention.
- the flat display device 21 includes a pixel section 22 in which pixels formed by organic EL elements are arranged in a matrix, and a pixel section through a scanning line provided in the pixel section 22 so as to extend in the horizontal direction.
- Vertical drive circuits 23 A and 23 B that output drive signals to 22 A horizontal drive that sets the gradation of each pixel via signal lines provided to extend vertically in the pixel section 22
- the circuit 24 is formed integrally on the glass substrate 25 by the N-channel TFT made of amorphous silicon.
- the flat display device 21 is a timing display device for driving various driving signals and clocks necessary for the operation of the vertical driving circuits 23 A and 23 B and the horizontal driving circuit 24.
- FIG. 5 is a connection diagram showing the vertical drive circuit 23A.
- the vertical drive circuit 23A sequentially transfers the drive signal IN output from the timing generator 26 in the vertical direction of the pixel section 22 by the latch circuits 31A, 31B, 31A,.
- the output signals of B, 31A,... are respectively output to the respective scanning lines of the pixel section 22 by the buffer circuit 32.
- the vertical drive circuit 23B has the same configuration as the vertical drive circuit 23A except that the drive signal output from the timing generator 26 used for this transfer is different. Description of 23B is omitted.
- the vertical drive circuit 23A has a latch circuit 31A that latches an input signal by a clock CK having a duty ratio of approximately 50%, and an input signal by a clock CKX by an inverted signal of the clock CK.
- the drive signal IN generated by the timing generator 26 is input to the first-stage latch circuit 31A, which is formed by alternately connecting latch circuits 31B to be latched in series.
- the latch circuit 31A which latches the input signal by the clock CK, drives the gates of the transistors TR1 and TR2 by the transistors CK and CKX, respectively, so that the transistors TR1 and TR2 respectively A switch circuit that switches on and off operations by switching operations in a complementary manner is formed, and the switch circuits are connected in series to form a series circuit by the switch circuit.
- the first-stage latch circuit 31A inputs the drive signal IN output from the timing generator 26 to one end of this series circuit and the transistor TR1 side that is turned on by the clock CK, and latches the latch circuits other than the first-stage latch circuit. In 31 A, the output signal of the preceding latch circuit 31 B is input to this one end.
- the latch circuit 31A inputs, to the other end of the series circuit, an output signal whose signal level changes in accordance with the output of the connection point of the series circuit.
- an output signal of a second inverter circuit 34 described later is applied to this output signal. That is, in the latch circuit 31A, the first inverter circuit 33 is formed by connecting the transistors TR3 and TR4 in series between the power supply Vcc1 and the ground, and the similar transistors TR5 and TR6 are connected.
- the second inverter circuit 34 is formed by connecting in series. In the first and second inverter circuits 33 and 34, the gates of the transistors TR4 and TR6 on the power supply voltage Vcc1 side are connected to the reference voltage Vcc2, respectively.
- the gate of the ground transistor TR3 is connected to the midpoint of the connection between the transistors TR1 and TR2.
- the gate of the ground transistor TR5 is connected to the gate of the ground transistor TR5.
- the output of the inverter circuit 33 by the TR 4 is input, and the output of the second inverter circuit 34 is set to the output OUT of the latch circuit 31A.
- the input signal IN (FIG. 6 (A)) whose signal level rises at a predetermined timing is input, and the clock CK and the clock CK are input. ⁇ ⁇ ⁇
- the inverter circuit 33 by the transistors TR3 and TR4 via the switch circuit by the transistor TR1, and the inverter circuit 34 by the transistors TR5 and TR6
- the input signal IN is supplied to the series circuit, and the output signal OUT (Fig. 6 (C)) rises in response to the rise of the input signal IN.
- the switch circuit composed of 1, the transistors TR1 and TR2 respectively The transistor TR 1 is switched to the off state and the on state.In this case, the transistor TR 1 is switched to the off state by the gate capacitance in the output signal of the second inverter circuit 34 input to the side switched to the on state.
- the output signal of the second inverter circuit 34 which is held at the H level, quickly enters the series circuit formed by the inverter circuits 33 and 34 via the switch circuit formed by the transistor TR2.
- the signal level of the input signal IN acquired by the clock CK is maintained. Therefore, in the latch circuit 31A, after the input signal IN falls, the signal level of the input signal IN is similarly captured and held by the rise and fall of the clocks CK and CKX. become.
- the clocks that drive the switch circuits formed by the transistors TR1 and TR2, respectively, are opposite to the clock CKX and the latch circuit 31A.
- CK CK is set so that the latch result of the preceding latch circuit 31A is output with a delay of 1Z2 cycle of the clock CK.
- the vertical drive circuit 23A constitutes a shift register circuit, and sequentially outputs the drive signal IN output from the timing generator 26 with a delay of one to two cycles of the clock CK.
- the output signals of the inverter circuits 33 and 34 are sufficiently output.
- the transistors TR3 and TR5 on the ground side are formed with a larger shape than the transistors TR4 and TR6 on the power supply Vcc side so that the on-resistance can be reduced so that the signal level can be lowered to a lower level. It has been made.
- the reference voltage V cc 2 of the inverter circuits 33 and 34 is set to a higher voltage than the voltage of the power supply V cc by the threshold voltage of the transistors TR 4 and TR 6 on the power V cc side. In circuits 33 and 34, the output is not forced off.
- the transistors TR1 and TR2 constitute a first series circuit composed of a set of transistors that are switched on complementarily, and the transistors TR3 and TR4 are connected to the first series circuit.
- the first inverter circuit is constituted by a set of transistors that connects the connection midpoint of the series circuit to the gate of one of the transistors.
- the transistors TR5 and TR6 constitute a second inverter circuit composed of a pair of transistors that output an in-phase signal of an input signal whose signal level switches with a delay with respect to the input signal IN.
- the input signal IN is input to one end of the first series circuit, and the in-phase signal is input to the other end of the first series circuit. Is to be entered.
- the pixels provided in the pixel portion 22 are driven line by line by the driving signals output from the vertical driving circuits 23A and 23B. Then, the gradation of each pixel is sequentially set by the drive signal output from the horizontal drive circuit 24 to each signal line, whereby a desired image is displayed.
- the driving of the pixels by the vertical driving circuits 23 A and 23 B is performed by driving the driving signal IN output from the timing generator 26 by the shift register into the pixel section 2. 2 is sequentially transferred in the vertical direction, and the output signal of each stage of the shift register is output to each scanning line of the pixel unit 22 to be executed.
- this shift register is formed by a series circuit of latch circuits 31A, 31B, 31A, 3IB,.
- the drive signal IN output from the timing generator 26 or the drive signal output from the preceding latch circuit 31B is used to switch the transistors TR1 and TR2 that are turned on and off complementarily.
- the first series circuit is supplied to the first series circuit, and the output of the connection midpoint of the first series circuit is output to the next stage via the first and second inverter circuits 33 and 34.
- the input signal IN is input via the transistor TR1 of the first series circuit, and the transistor TR1 is turned on / off in the output OUT of the latch circuit 31A.
- the signal level of the input signal IN is set with the delay of the operation time of the inverters 33 and 34, whereby the signal level of the input signal IN is obtained based on the clock CK. .
- the input signal IN can be latched and output by the N-channel transistors TR1 to TR6.
- a latch circuit 31A for latching an input signal by such a clock CK, and clocks CK and CKX for the latch circuit 31A are exchanged to obtain a clock CK.
- a latch circuit 31B that latches an input signal by a clock CKX, which is an inverted signal of the clock CKX, is formed by connecting in series with each other. The signals are sequentially transferred, and thus, even in this shift register circuit, all the transistors can be formed in an N-channel type to generate a drive signal.
- the flat display device 21 and the vertical drive circuit as the drive circuit for the flat display device 21 can be formed by TFTs using amorphous silicon, and the drive circuit and the pixel portion are integrally formed on a glass substrate.
- a flat display device can be manufactured by a simple process.
- a series circuit is formed by a switch circuit including a pair of transistors that switch operations in a complementary manner, and a connection midpoint output of the series circuit is output to the inverter circuit.
- a latch circuit that operates with only a single-channel transistor by supplying an input signal to the other end and supplying an output signal from an inverter circuit corresponding to the output of the connection point of the series circuit to the other end, a shift register using the latch circuit A circuit, a driving circuit of a display device, and a display device can be obtained.
- a second inverter circuit for inputting the output signal of the first inverter circuit to the gut of one transistor is provided for the first inverter circuit for inputting the connection midpoint output of the series circuit, By inputting the output signal of the inverter circuit to the other end of the series circuit, a signal delayed with respect to the input signal can be created with a simple configuration.
- FIG. 9 is a connection diagram showing a vertical drive circuit of a flat display device according to Embodiment 2 of the present invention.
- the latch circuits 41 A and 4 IB are used instead of the latch circuits 31 A and 3 IB described in the first embodiment. Is applied. Note that, in this embodiment, except that the configuration of the latch circuits 41A and 4IB is different, the configuration is the same as the flat display device 21 described above in the first embodiment. Description is omitted.
- the ground-side transistors TR3 and TR5 of the inverter circuits 33 and 34 need to be large.
- the latch circuit 41A similar to the latch circuits 31 A according to Example 1, the input signal IN or the output signal of the preceding stage is inputted to one end, the second I converter circuit 3 fourth output signal A first series circuit is provided by transistors TR1 and TR2 for inputting the other end to the other end, and an inverter circuit 33 including transistors TR3 and TR4 for inputting the midpoint output of the series circuit.
- a second inverter circuit 34 including transistors TR5 and TR6 for inputting an output signal is provided.
- the latch circuit 41A is provided for the first series circuit, the first inverter circuit 33, and the second inverter circuit 34.
- a second system including a first series circuit, a first inverter circuit 33A, and a second inverter circuit 34A corresponding to the second inverter circuit 34 is provided.
- a first series circuit is formed by a switch circuit composed of transistors TR7 and TR8 that switch on and off by complementary operation with clocks CK and CKX.
- the transistors TR9 and TR10 are connected in series, and the midpoint output of the series connection of the transistors TR7 and TR8 is input to the gate of the ground-side transistor TR9. It has been done.
- the second inverter circuit 34A In other words, the transistors TR 9 and TR 10 are connected in series, the output signal of the first inverter circuit 33 A is input to the gate of the ground side transistor TR 11, and the output signal of the second inverter circuit 34 A is The output signal is fed back to the other end of the series circuit composed of the transistors TR7 and TR8.
- an input signal input to the first system is formed at one end on the clock CK side of the series circuit formed by the transistors TR7 and TR8 in such a manner as to correspond to the first system.
- An input signal I NX whose polarity is inverted is input to IN, so that each section corresponding to the first system generates a signal with a polarity opposite to that of the first system. .
- the latch circuit 41A controls on / off of the power supply side transistors TR4 and TR6 of the first and second inverter circuits 33 and 34 in the first system by the signal of the opposite polarity.
- the transistors TR 4 and TR 6 on the power supply side and the transistors TR 3 and TR 5 on the ground side are turned on and off in a complementary manner, thereby preventing the rise and fall of the output signals of these inverter circuits 33 and 34 from becoming dull.
- the power consumption is reduced, and the output signal OUT can be output with a sufficient dynamic range even if the transistors TR3 to TR6 of the inverter circuits 33 and 34 are formed small.
- the latch circuit 41A also supplies power-side transistors TR10, TR12 to the first and second inverter circuits 33A and 34A in the second system by signals of opposite polarities in the first system.
- the power transistors TR 10 and TR 12 and the ground transistors TR 9 and TR 11 are turned on / off in a complementary manner.
- the rise and fall of the output signals of the inverter circuits 33A and 34A are prevented, the power consumption is reduced, and the transistors TR9 to TR12 of the inverter circuits 33A and 34A are further reduced.
- the output signal can be output with a sufficient dynamic range even if it is formed small.
- the gate of the power supply side transistor TR4 is connected to the transistor of the second system.
- the gate of the transistor TR6 on the power supply side is connected to the first inverter circuit of the second system TR7, TR8.
- 34 A output signal is input.
- the midpoint output of the connection between the transistors TR1 and TR2 of the first system is input to the gate of the transistor TR10 on the power supply side
- the output signal of the first inverter circuit 34 of the first system is input to the gate of the power supply side transistor TR12.
- each of the transistors TR1 to TR12 is formed to be small in size with substantially the same size.
- the inverted signal I NX of the input signal IN is generated by the timing generator 26.
- the latch circuit 41A outputs the output signals of the first and second systems to the next-stage latch circuit 41B, and the next-stage latch circuit 41B latches the input signal by the clock CK.
- the ports CK and CKX are interchanged and formed.
- the latch circuits 41A, 41B, 41A,... Sequentially transfer the drive signal IN with a delay of 12 cycles of the clock CK, and the buffer circuit 32 This drive signal is output via the control circuit.
- a second system corresponding to the first system is formed, and signals of opposite polarities are generated between the first system gun and the second system.
- the power consumption is reduced and the transition of the output signal is improved. The effect of can be obtained.
- FIG. 10 is a connection diagram showing a vertical drive circuit of a flat display device according to Embodiment 3 of the present invention.
- the latch circuits 51 A and 51 IB are replaced with the latch circuits 31 A and 3 IB described in the first embodiment. B applies.
- the configuration is the same as that of the flat display device 21 described in the first embodiment except that the configuration relating to the latch circuits 51A and 5IB is different. Is omitted.
- the latch circuit 51A is provided with a first series circuit including transistors TR1 and TR2 that input the input signal IN or the output signal of the previous stage to one end.
- An inverter circuit 33 including transistors TR3 and TR4 for inputting the output of the connection midpoint of the first series circuit is provided.
- the latch circuit 51A forms a second series circuit by a switch circuit of the transistors TR5 and TR6 which are turned on and off by the clocks CK: and CKX to switch the operation complementarily.
- the inverted signal I NX of the input signal IN or the inverted signal of the output signal OUT of the previous stage is input to the CK side end of the second series circuit.
- an inverter circuit 33B is formed by the transistors TR7 and TR8, and a connection middle point output by the second series circuit is input to the ground transistor TR7 of the inverter circuit 33B.
- the latch circuit 51A is inverted by the second series circuit formed by the transistors TR5 and TR6 and the inverter 33B with respect to the first series circuit formed by the transistors TR1 and TR2 and the system formed by the inverter circuit 33.
- a signal corresponding to the polarity is generated.
- an output signal corresponding to the connection midpoint output of the first series circuit is generated by the inverter circuit 33B related to the second series circuit, and an output signal corresponding to the connection midpoint output of the second series circuit is generated by the second series circuit. It is generated by an inverter circuit 33 related to the series circuit of No. 1.
- the latch circuit 51A inputs the output signal of the inverter circuit 33B to the other end of the first series circuit, and inputs the output signal of the inverter circuit 33 to the other end of the second series circuit. Also, the midpoint output of the second series circuit is input to the power supply transistor TR4 of the inverter circuit 33, and the midpoint output of the first series circuit is input to the power supply transistor TR8 of the inverter circuit 33B. It has been done. The output signals of the inverter circuits 33 and 33B are output to the next stage. Further, in the latch circuit 51B relating to the clock CKX, the clock and CKX are exchanged, so that the configuration is the same as that of the latch circuit 51A relating to the clock CK. The vertical drive circuits 50 A and 50 B correspond to the configuration of the latch circuits 51 A and 5 IB. Switching is possible with a latch circuit 51 B by CKX.
- the buffer circuit may be configured by an inverter circuit to output an output signal in an opposite phase to the input signal.
- the output signal of the first inverter circuit 33 may be configured to be output to the buffer circuit.
- the second system In the configuration of the third embodiment, the output signals of the inverter circuits 33 and 33B are respectively output from the latch circuits 51A and 51B. It can be configured to output a signal to the buffer circuit.
- the shift register circuit is configured by serially connecting clocked inverter circuits that acquire the input signal IN by the clock CK and output the inverted signal.
- each scanning line is driven with the same polarity as the driving signal output from the timing generator.
- the present invention is not limited to this. Can be widely applied.
- the latch circuit and the clocked inverter circuit are configured by N-channel transistors.
- the present invention can be widely applied to a case where a latch circuit and a clocked inverter circuit are configured by transistors having the same polarity, such as a case of forming a P-channel type.
- the process can be simplified by that much because the film can be formed by transistors having the same polarity.
- the present invention is not limited to this.
- the method can be widely applied to the case of using silicon.
- the transistors can be formed using transistors having the same polarity, the process can be simplified accordingly.
- the present invention is not limited to this, and various drive circuits and It can be widely applied to circuits.
- the present invention can be applied to, for example, a flat display device using an organic EL element.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/581,076 US7532188B2 (en) | 2003-12-01 | 2004-11-18 | Clocked inverter circuit, latch circuit, shift register circuit, drive circuit for display apparatus, and display apparatus |
KR1020067010433A KR101146079B1 (ko) | 2003-12-01 | 2004-11-18 | 클럭드 인버터 회로, 래치 회로, 시프트 레지스터 회로,표시 장치의 구동 회로, 표시 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003401274A JP4296492B2 (ja) | 2003-12-01 | 2003-12-01 | ラッチ回路、シフトレジスタ回路、表示装置の駆動回路、表示装置 |
JP2003-401274 | 2003-12-01 |
Publications (1)
Publication Number | Publication Date |
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WO2005055427A1 true WO2005055427A1 (ja) | 2005-06-16 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/017529 WO2005055427A1 (ja) | 2003-12-01 | 2004-11-18 | クロックドインバータ回路、ラッチ回路、シフトレジスタ回路、表示装置の駆動回路、表示装置 |
Country Status (6)
Country | Link |
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US (1) | US7532188B2 (ja) |
JP (1) | JP4296492B2 (ja) |
KR (1) | KR101146079B1 (ja) |
CN (1) | CN100566166C (ja) |
TW (1) | TWI284304B (ja) |
WO (1) | WO2005055427A1 (ja) |
Families Citing this family (9)
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KR100624115B1 (ko) * | 2005-08-16 | 2006-09-15 | 삼성에스디아이 주식회사 | 유기전계발광장치의 발광제어 구동장치 |
GB2459451A (en) * | 2008-04-22 | 2009-10-28 | Sharp Kk | A scan pulse shift register for an active matrix display |
GB2459661A (en) * | 2008-04-29 | 2009-11-04 | Sharp Kk | A low power NMOS latch for an LCD scan pulse shift register |
KR20180094132A (ko) | 2009-09-24 | 2018-08-22 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 구동 회로, 상기 구동 회로를 포함하는 표시 장치, 및 상기 표시 장치를 포함하는 전자 기기 |
JP5791281B2 (ja) * | 2010-02-18 | 2015-10-07 | キヤノン株式会社 | 放射線検出装置及び放射線検出システム |
JP2012239046A (ja) | 2011-05-12 | 2012-12-06 | Japan Display East Co Ltd | ラッチ回路およびラッチ回路を用いた表示装置 |
JP2013084333A (ja) | 2011-09-28 | 2013-05-09 | Semiconductor Energy Lab Co Ltd | シフトレジスタ回路 |
JP5856799B2 (ja) | 2011-10-17 | 2016-02-10 | ピクストロニクス,インコーポレイテッド | ラッチ回路および表示装置 |
JP2013134275A (ja) | 2011-12-26 | 2013-07-08 | Japan Display East Co Ltd | 表示装置およびその駆動方法 |
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- 2003-12-01 JP JP2003401274A patent/JP4296492B2/ja not_active Expired - Lifetime
-
2004
- 2004-11-18 WO PCT/JP2004/017529 patent/WO2005055427A1/ja active Application Filing
- 2004-11-18 KR KR1020067010433A patent/KR101146079B1/ko active IP Right Grant
- 2004-11-18 CN CNB2004800354462A patent/CN100566166C/zh active Active
- 2004-11-18 US US10/581,076 patent/US7532188B2/en active Active
- 2004-12-01 TW TW093137066A patent/TWI284304B/zh active
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JP2002149133A (ja) * | 2000-11-13 | 2002-05-24 | Seiko Epson Corp | 電気光学装置の駆動回路及び駆動方法 |
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JP2003167543A (ja) * | 2001-11-30 | 2003-06-13 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4296492B2 (ja) | 2009-07-15 |
TW200529138A (en) | 2005-09-01 |
KR20060131764A (ko) | 2006-12-20 |
KR101146079B1 (ko) | 2012-05-15 |
US20070091014A1 (en) | 2007-04-26 |
CN1886896A (zh) | 2006-12-27 |
US7532188B2 (en) | 2009-05-12 |
JP2005164802A (ja) | 2005-06-23 |
CN100566166C (zh) | 2009-12-02 |
TWI284304B (en) | 2007-07-21 |
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