WO2010146751A1 - 表示駆動回路、表示パネル、表示装置 - Google Patents
表示駆動回路、表示パネル、表示装置 Download PDFInfo
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- WO2010146751A1 WO2010146751A1 PCT/JP2010/001938 JP2010001938W WO2010146751A1 WO 2010146751 A1 WO2010146751 A1 WO 2010146751A1 JP 2010001938 W JP2010001938 W JP 2010001938W WO 2010146751 A1 WO2010146751 A1 WO 2010146751A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/28—Digital stores in which the information is moved stepwise, e.g. shift registers using semiconductor elements
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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
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
- G09G2310/063—Waveforms for resetting the whole screen at once
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
Definitions
- the present invention relates to a display drive circuit (various display drivers) that performs simultaneous selection of signal lines at a predetermined timing.
- Patent Document 1 discloses a set-reset flip-flop having an initial terminal (INI) at each stage of a shift register included in a gate driver for a liquid crystal display device, an analog switch 43, and an N-channel transistor 44.
- a configuration is disclosed in which a clock circuit CK is input to the analog switch 43, the source of the transistor 44 is connected to VSS, and the output signal On of each stage is supplied to the scanning signal line.
- the start pulse ST is activated while the clock signal CK is fixed to be active when the power of the liquid crystal display device is turned on, the output signals (On ⁇ 1, On, On + 1) of all stages. Etc.) become active while being sequentially delayed.
- Vcom common electrode potential
- both the SB signal and the R signal are active ⁇ when both the SB signal and the R signal transition to inactive, the flip-flop is in the holding state and its output Q becomes High (see FIG. 40).
- the flip-flop is reset and its output Q becomes Low (FIG. 41).
- the flip-flop is set and its output Q Becomes High (see FIG. 42).
- This display drive circuit is a display drive circuit that includes a shift register and simultaneously selects a plurality of signal lines at a predetermined timing, and is a set-reset type in which an initialization signal is input to each stage of the shift register.
- a flip-flop and a signal generation circuit that receives the simultaneous selection signal and generates an output signal of its own stage using the output of the flip-flop, and the output signal of each stage of the shift register receives the simultaneous selection signal
- the flip-flop output is active when the initialization signal is active and the set signal and the reset signal are active. Even if it is inactive, it becomes inactive and the initialization signal is made active before the end of the simultaneous selection, Characterized in that it is inactive to After the completion.
- the initialization of the shift register (initialization of the flip-flops at each stage) is completed when the simultaneous selection is completed and the set signal and the reset signal are deactivated. Therefore, the operation of the shift register after completion of the simultaneous selection is stabilized as compared with the conventional driver (see FIGS. 38 and 39) in which the flip-flop is in an indefinite state after the simultaneous selection is completed until the INI signal is input. Can do.
- the operation of the shift register after completion of simultaneous selection can be stabilized in a display drive circuit that performs simultaneous selection of a plurality of signal lines at a predetermined timing.
- FIG. 1 is a schematic diagram illustrating a configuration of a liquid crystal display device according to a first embodiment.
- FIG. 2 is a circuit diagram showing a part of a shift register of the liquid crystal display device shown in FIG. 1.
- FIG. 3 is a circuit diagram (a) and a truth table (b) of a flip-flop of the shift register shown in FIG. 2.
- 3 is a timing chart showing a driving method (when the power is turned on) of the liquid crystal display device of FIG. 1.
- 2 is a timing chart showing a driving method of the liquid crystal display device of FIG. 1 (when SB signal return and R signal return are simultaneous).
- 2 is a timing chart showing a driving method of the liquid crystal display device of FIG. 1 (when the return of the SB signal is earlier than the return of the R signal).
- FIG. 3 is a timing chart showing a driving method of the liquid crystal display device of FIG. 1 (when the return of the SB signal is slower than the return of the R signal).
- FIG. 6 is a schematic diagram illustrating another configuration of the liquid crystal display device according to the first embodiment.
- FIG. 6 is a schematic diagram illustrating still another configuration of the liquid crystal display device according to the first embodiment.
- FIG. 10 is a circuit diagram showing a part of a shift register of the liquid crystal display device shown in FIG. 9.
- FIG. 11 is a circuit diagram (a), an operation timing chart (b), and a truth table (c) of the flip-flop of the shift register shown in FIG. 10.
- 10 is a timing chart showing a method for driving the liquid crystal display device of FIG. 9 (when the power is turned on).
- FIG. 10 is a timing chart showing a driving method of the liquid crystal display device of FIG. 9 (when SB signal return and R signal return are simultaneous).
- 10 is a timing chart showing a driving method of the liquid crystal display device of FIG. 9 (when the return of the SB signal is earlier than the return of the R signal).
- 10 is a timing chart showing a driving method of the liquid crystal display device of FIG. 9 (when the return of the SB signal is slower than the return of the R signal). It is the production
- FIG. 10 is a schematic diagram illustrating still another configuration of the liquid crystal display device according to the second embodiment.
- FIG. 10 is a schematic diagram illustrating still another configuration of the liquid crystal display device according to the second embodiment.
- FIG. 19 is a circuit diagram showing a part of a shift register of the liquid crystal display device shown in FIG. 18.
- FIG. 19 is a timing chart showing a method for driving the liquid crystal display device of FIG. 18 (when the power is turned on).
- FIG. FIG. 19 is a circuit diagram (a), an operation timing chart (b), and a truth table (c) of the flip-flop of the shift register shown in FIG.
- FIG. 19 is a circuit diagram of a flip-flop of the shift register shown in FIG. 18.
- 19 is a timing chart showing a driving method of the liquid crystal display device of FIG. 18 (when the return of the SB signal is slower than the return of the R signal).
- FIG. 19 is a timing chart showing a driving method of the liquid crystal display device of FIG. 18 (when the return of the SB signal is slower than the return of the R signal).
- FIG. 19 is a circuit diagram (a), an operation timing chart (b), and a truth table (c) of the flip-flop of the shift register shown in FIG.
- FIG. 20 is a circuit diagram showing a specific configuration of the NAND of FIG. 19. It is a schematic diagram which shows the structure of the liquid crystal display device concerning this Embodiment 3.
- FIG. 27 is a circuit diagram showing each stage of the shift register of the liquid crystal display device shown in FIG. 26.
- FIG. 27 is a circuit diagram showing a D latch circuit of a G-CS driver of the liquid crystal display device shown in FIG. 26.
- 27 is a timing chart illustrating a method for driving the liquid crystal display device of FIG. 27 is a timing chart illustrating a method for driving the liquid crystal display device of FIG.
- FIG. 32 is a timing chart showing a method for driving the liquid crystal display device of FIG. 31.
- FIG. FIG. 32 is a timing chart showing a method for driving the liquid crystal display device of FIG. 31.
- FIG. It is a circuit diagram which shows the structural example of each stage of a shift register. It is a timing chart which shows the modification of FIG. 21 is a timing chart showing another modification of FIG. FIG. 21 is a timing chart showing still another modification of FIG. 20.
- FIG. It is a circuit diagram which shows the structure of the conventional shift register. It is a timing chart which shows the drive method of the conventional shift register.
- a set signal (S signal or SB signal) is input to a set terminal (S terminal or SB terminal) of a set-reset type flip-flop (hereinafter abbreviated as FF as appropriate), and a reset terminal (R A reset signal (R signal or RB signal) is input to the terminal or RB terminal, and an initialization signal (INIT signal or INITB signal) is input to the initialization terminal (INI terminal or INITB terminal)
- the Q signal is output from the output terminal (Q terminal), and the QB signal is output from the inverted output terminal (QB terminal).
- VDD high potential side power supply
- VSS low potential side power supply
- S signal set signal
- R signal reset signal
- Q signal output signal
- SB set bar signal
- RB signal reset bar signal
- QB QB signal
- FIG. 1 is a circuit diagram showing a configuration of a liquid crystal display device 3a according to the present invention.
- the liquid crystal display device 3a includes a display unit DAR, a gate driver GD, a source driver SD, and a display control circuit DCC.
- the display control circuit DCC supplies the gate driver GD with an INITB signal (initialization signal), an AONB signal (simultaneous selection signal), a gate start pulse GSP, a gate on enable signal GOE, and gate clock signals GCKB1 and GCKB2.
- the display control circuit DCC supplies a source start pulse SSP, digital data DAT, a polarity signal POL, and a source clock signal SCK to the source driver SD.
- the gate driver GD includes a shift register SR having a plurality of stages.
- the output signal (OUT signal) from the i-stage SRi of the shift register is supplied to the scanning signal line Gi of the display unit DAR via the buffer.
- the OUT signal of the n stage SRn is supplied to the scanning signal line Gn via the buffer.
- the scanning signal line Gn is connected to the gate of a transistor connected to the pixel electrode in PIXn, and a storage capacitor (auxiliary capacitor) is formed between the pixel electrode in PIXn and the storage capacitor line CSn.
- one analog switch asw and an inverter are provided corresponding to one data signal line, the input of this inverter is connected to the AONB signal line, and the end of the data signal line is one of the continuity of the analog switch asw.
- the other conduction terminal of the analog switch asw is connected to the Vcom (common electrode potential) power source, the N channel side gate of the analog switch asw is connected to the output of the inverter, and the P channel side gate of the analog switch asw is Connected to AONB signal line.
- FIG. 2 is a circuit diagram showing a specific configuration of part of the shift register SR.
- each stage of the shift register includes a set / reset type flip-flop FF having an SB terminal, an R terminal, and an INITB terminal, two analog switches ASW9 and ASW10, an inverter, a CKB terminal, and an ONB.
- the Q terminal of the flip-flop FF is connected to the P channel side gate of the analog switch ASW9 and the N channel side gate of the analog switch ASW10, and the QB terminal of the FF is analog Connected to the N channel side gate of the switch ASW9 and the P channel side gate of the analog switch ASW10, one conduction electrode of the analog switch ASW9 is connected to the ONB terminal, and one conduction electrode of the analog switch ASW10 is connected to the CK terminal.
- Connected and analog switch And the other conductive electrode of ASW9, is connected to the OUTB terminal is an output terminal of the stage and the other conductive electrode of the analog switch ASW10, OUTB terminal is connected to the OUT terminal through the inverter.
- the OUTB terminal of the own stage is connected to the SB terminal of the next stage, and the OUT terminal of the next stage is connected to the R terminal of the own stage.
- the OUTB terminal of the n stage SRn is connected to the SB terminal of the (n + 1) stage SRn + 1
- the OUT terminal of the (n + 1) stage SRn + 1 is connected to the R terminal of the n stage SRn.
- the GSPB signal is input to the SB terminal of the first stage SR1 of the shift register SR.
- the INITB terminal of each stage flip-flop is connected to the INITB signal line, the ONB terminal of each stage is connected to the AONB signal line, and the odd stage CKB terminal and the even stage CKB terminal are different. It is connected to a GCKB line (a line for supplying GCKB).
- a GCKB line a line for supplying GCKB.
- the CKB terminal of the n stage SRn is connected to the GCK2B signal line
- the CKB terminal of the (n + 1) stage SRn + 1 is connected to the GCK1B signal line.
- the flip-flop FF1 shown in FIG. 3 is used for the flip-flop FF of FIG.
- the flip-flop FF1 includes a P-channel transistor p84 and an N-channel transistor n84 that constitute a CMOS circuit, a P-channel transistor p85 and an N-channel transistor n85 that constitute a CMOS circuit, and P-channel transistors p82 and p83.
- the drain of n83 is connected, the source of n81 and the drain of n82 are connected, the INITB terminal is connected to the source of p82 and the gate of p86, and the SB terminal is connected to the gate of p82, the gate of n81, and the gate of n83
- the R terminal is connected to the gate of n82 and the gate of p83, the source of n85 is connected to VSS, the sources of p82
- FIG. 3B is a truth table of FF1.
- the Q signal of FF1 is low (inactive) during the period when the SB signal is high (inactive) and the R signal is high (active), and the SB signal is high (inactive).
- the hold state is set.
- the SB signal is Low (active) and the R signal is High (active)
- the SB signal is Low (active) and the R signal is Low. It becomes High (active) during the period of (inactive).
- the flip-flop FF1 when both the SB signal and the R signal are inactive while the INITB terminal is active (Low), p82 and n86 are OFF, and p85, p86, n83, and n84 are ON and the Q signal is turned on. Is Low and the QB signal is High (inactive). When both the SB signal and the R signal are active while the INITB terminal is active (Low), p82, p86, and p85 are turned on, the Q signal is Low, and the QB signal is High (inactive).
- the flip-flop FF1 when the SB signal is active (Low) and the R signal is inactive (High) while the INITB terminal is active (Low), p82 and p85 are ON and p84 is OFF. The Q signal is low and the QB signal is high (inactive).
- the flip-flop FF1 when the SB signal is inactive (High) and the R signal is active (High) while the INITB terminal is active (Low), the n81, n82, and p85 are turned on and the Q signal is turned on. Is Low and the QB signal is High (inactive).
- FIG. 4 is a timing chart showing a driving method when the liquid crystal display device 3a is powered on.
- AONB is an AONB signal (simultaneous selection signal)
- INITB is an INITB signal (initialization signal)
- GSPB is a gate start pulse bar signal
- GCK1B is a GCK1B signal
- GCK2B is a GCK2B signal
- OUT signal (potential of OUT terminal).
- the following preparation operation is performed when the power is turned on. Specifically, the AONB signal and the INITB signal are simultaneously activated (Low), and after the AONB signal returns to inactive (High), the INITB signal returns to inactive (High). Since the ASW 9 is ON in each stage of the shift register SR, the OUT signals in all stages are thereby activated (High), and all scanning signal lines are selected. At this time, since the analog switch asw corresponding to each data signal line is turned on, Vcom is supplied to all the data signal lines. In each stage flip-flop, the INITB signal is active (Low), so that the Q signal is Low (inactive) and the QB signal is High (inactive). After the above preparatory operation is completed (after the AONB signal becomes inactive), Vcom is written to all PIX of the display unit DAR, and the shift register SR is initialized (the output of the flip-flop at each stage is (Inactive) state.
- the shift register SR of the liquid crystal display device 3a the following operation is performed during each vertical scanning period (when each frame is displayed). That is, when the SB signal input to the own stage becomes active (Low), the FF of the own stage is set, the Q signal becomes High (active), and the GCKB signal is taken into the own stage via the analog switch ASW10. .
- the self-stage GCKB signal becomes active (High)
- the self-stage OUTB signal becomes active (Low)
- the next-stage SB signal becomes active.
- the OUTB signal of the next stage FF becomes active, and the GCKB signal is taken into the next stage.
- next-stage GCKB signal becomes active (Low)
- the FF of its own stage is reset, the Q signal becomes Low (inactive), and the analog switch ASW9 is turned ON.
- the AONB signal is High
- the OUTB signal of its own stage is also High (inactive).
- liquid crystal display device 3a for example, all scanning signal lines are simultaneously selected when the power is turned on, and the same potential (for example, Vcom) can be written to all the pixels, so that screen disturbance when the power is turned on can be eliminated.
- Vcom voltage-to-emitter-to-emitter-to-emitter-to-emitter-to-emitter-to-emitter-to-emitter-to-emitter-to-Vcom
- the output Q of the flip-flop is always inactive (Low), and both the SB signal and the R signal are active ⁇ the SB signal is active and the R signal is inactive as shown in FIG. 7. Both the SB signal and the R signal are inactive.
- the output Q of the flip-flop is always inactive (Low) even if the transition is made. Therefore, it is possible to stabilize the operation of the shift register when returning from the simultaneous selection and after the return.
- the gate driver can be downsized as compared with the conventional configuration shown in FIG.
- the preparation operation can be completed more quickly than in the conventional configuration in which simultaneous selection and shift register initialization are performed separately.
- FIG. 8 is a circuit diagram showing a configuration of a liquid crystal display device 3b using the shift register SR of FIG. 1 on the source driver side.
- the source start pulse SSP is input to the first stage of the shift register SR
- the source clock bar signal SCK1B or SCK2B is input to the CKB terminal of each stage.
- the OUT signal output from the i stage SRi is supplied to the sampling circuit SAC, and the data sampled by the OUT signal is supplied to the data signal line SLi of the display unit DAR through the DAC.
- the OUT signal of the n stage SRn is supplied to the sampling circuit SAC, and the data sampled by this OUT signal is supplied to the data signal line SLn of the display unit DAR through the DAC.
- the data signal line SLn is connected to the source of a transistor connected to the pixel electrode in PIXn.
- FIG. 9 is a circuit diagram showing a configuration of a liquid crystal display device 3c obtained by modifying the liquid crystal display device 3a.
- FIG. 10 is a circuit diagram showing a part of the shift register SR of the liquid crystal display device 3c.
- each stage of the shift register includes a set / reset type flip-flop FF having an SB terminal, an RB terminal, and an INITB terminal, two analog switches ASW3 and ASW4, an inverter, a CKB terminal, and an ONB. Terminal, OUT terminal, and OUTB terminal, the Q terminal of FF is connected to the P channel side gate of analog switch ASW3 and the N channel side gate of analog switch ASW4, and the QB terminal of FF is analog switch ASW3.
- the N-channel side gate of the analog switch ASW4 and the P-channel side gate of the analog switch ASW4 are connected, one conductive electrode of the analog switch ASW3 is connected to the ONB terminal, and one conductive electrode of the analog switch ASW4 is connected to the CKB terminal.
- the other lead of the analog switch ASW3 And the electrode is connected to the OUTB terminal is an output terminal of the stage and the other conductive electrode of the analog switch ASW4, OUTB terminal is connected to the OUT terminal through the inverter.
- the OUTB terminal of its own stage is connected to the SB terminal of the next stage, and the OUTB terminal of the next stage is connected to the RB terminal of its own stage.
- the OUTB terminal of the n stage SRn is connected to the SB terminal of the (n + 1) stage SRn + 1
- the OUTB terminal of the (n + 1) stage SRn + 1 is connected to the RB terminal of the n stage SRn.
- the GSPB signal is input to the SB terminal of the first stage SR1 of the shift register SR.
- the INITB terminal of each stage flip-flop is connected to the INITB signal line, the ONB terminal of each stage is connected to the AONB signal line, and the odd stage CKB terminal and the even stage CKB terminal are different. It is connected to a GCKB line (a line for supplying GCKB).
- a GCKB line a line for supplying GCKB.
- the CKB terminal of the n stage SRn is connected to the GCK2B signal line
- the CKB terminal of the (n + 1) stage SRn + 1 is connected to the GCK1B signal line.
- the FF2 shown in FIG. 11 is used for the flip-flop FF of FIG.
- the FF 2 includes a P-channel transistor p6 and an N-channel transistor n5 that constitute a CMOS circuit, a P-channel transistor p8 and an N-channel transistor n7 that constitute a CMOS circuit, and P-channel transistors p5 and p7.
- the RB terminal is connected to the source of p5, the gate of p7, and the gate of n8, the INITB terminal is connected to the source of p6, the sources of p7 and p8 are connected to VDD, and the sources of n6 and n8 are set to VSS It is a connected configuration.
- p6, n5, p8 and n7 constitute a latch circuit LC
- p5 functions as a set transistor ST
- p7 functions as a reset transistor RT
- n6 and n8 function as a latch release transistor (release transistor) LRT.
- FIG. 11B is a timing chart showing the operation of FF2
- FIG. 11C is a truth table of FF2.
- the Q signal of FF2 is low (inactive) during the period when the SB signal is low (active) and the RB signal is low (active), and the SB signal is low (active).
- the RB signal is High (inactive)
- the SB signal is High (inactive) and the RB signal is Low (active)
- the SB signal is High (inactive).
- the RB signal is held (High) (inactive).
- the driving method when the power of the liquid crystal display device 3c is turned on is as shown in FIG.
- both the SB signal and the RB signal are active as shown in FIG.
- both the SB signal and the RB signal are active ⁇ the SB signal is inactive and the RB signal is active ⁇ the flip-flop is switched even if both the SB signal and the RB signal are inactive.
- the output Q is always inactive (Low), and both the SB signal and the RB signal are active ⁇ the SB signal is active and the RB signal is inactive ⁇ the SB signal and the RB signal are both inactive as shown in FIG.
- the output Q of the flip-flop is instantaneous (the SB signal is active and the RB signal is Otherwise though becomes active period) Undefined becomes inactive (Low). Therefore, it is possible to stabilize the operation of the shift register when returning from the simultaneous selection and after the return.
- the INITB signal used in the liquid crystal display devices 3a to 3c can be generated as shown in FIGS. 16 (a) and 16 (b), for example. That is, the AONB signal is input to a delay circuit in which a plurality of inverter circuits are connected in cascade, the output of the delay circuit and the AONB signal are input to the AND circuit, and the output of the AND circuit is used as the INTB signal. Also, it can be generated as shown in FIGS. That is, the AON signal is input to the SB terminal (setting terminal) of the set-reset type flip-flop, and the GSPB (gate start pulse) is input to the RB terminal (resetting terminal). ) Is the INITB signal.
- FIG. 18 is a circuit diagram showing a configuration of a liquid crystal display device 3d according to the present invention.
- the liquid crystal display device 3d includes a display unit DAR, a gate driver GD, a source driver SD, and a display control circuit DCC.
- the display control circuit DCC supplies an INITB signal (initialization signal), an AONB signal (simultaneous selection signal), a gate start pulse GSP, a gate on enable signal GOE, and gate clock signals GCK1B and GCK2B to the gate driver GD.
- the display control circuit DCC supplies a source start pulse SSP, digital data DAT, a polarity signal POL, and a source clock signal SCK to the source driver SD.
- the gate driver GD includes a shift register SR having a plurality of stages.
- the output signal (OUT signal) from the i-stage SRi of the shift register is supplied to the scanning signal line Gi of the display unit DAR via the buffer.
- the OUTB signal of the n stage SRn is supplied to the scanning signal line Gn via the buffer.
- the scanning signal line Gn is connected to the gate of a transistor connected to the pixel electrode in PIXn, and a storage capacitor (auxiliary capacitor) is formed between the pixel electrode in PIXn and the storage capacitor line CSn.
- one analog switch asw and an inverter are provided corresponding to one data signal line, the input of this inverter is connected to the AONB signal line, and the end of the data signal line is one of the continuity of the analog switch asw.
- the other conduction terminal of the analog switch asw is connected to the Vcom (common electrode potential) power source, the N channel side gate of the analog switch asw is connected to the output of the inverter, and the P channel side gate of the analog switch asw is Connected to AONB signal line.
- FIG. 19 is a circuit diagram showing a specific configuration of part of the shift register SR.
- each stage of the shift register includes a flip-flop FF (FF2 in FIG. 11) having INITB terminal, SB terminal and RB terminal, two analog switches ASW5 and ASW6 (gate circuit), NAND (Logic circuit), an inverter, a CKB terminal, an ONB terminal, and an OUTB terminal, the QB terminal of the flip-flop FF is connected to one input of the NAND, and the output of the NAND is connected to the input of the inverter
- the P channel side gate of the analog switch ASW5 and the N channel side gate of the analog switch ASW6 are connected, and the output of the inverter is connected to the N channel side gate of the analog switch ASW5 and the P channel side gate of the analog switch ASW6.
- One conductive electrode of switch ASW5 is in contact with ONB terminal
- one conduction electrode of the analog switch ASW6 is connected to the CKB terminal, the other conduction electrode of the analog switch ASW5, the other conduction electrode of the analog switch ASW6, and an OUTB terminal that is an output terminal of this stage;
- the other input of the NAND and the RB terminal of the FF are connected.
- the analog switches ASW5 and ASW6 (gate circuit) and the NAND (logic circuit) constitute a signal generation circuit that generates the OUTB signal.
- the OUTB terminal of its own stage is connected to the SB terminal of the next stage.
- the OUTB terminal of the n stage SRn is connected to the SB terminal of the (n + 1) stage SRn + 1.
- the GSPB signal is input to the SB terminal of the first stage SR1 of the shift register SR.
- the INITB terminal of each stage flip-flop is connected to the INITB signal line
- the ONB terminal of each stage is connected to the AONB signal line
- the odd stage CKB terminal and the even stage CKB terminal are different. It is connected to a GCKB line (a line for supplying GCKB).
- the CKB terminal of the n stage SRn is connected to the GCK2B signal line
- the CKB terminal of the (n + 1) stage SRn + 1 is connected to the GCK1B signal line.
- FIG. 20 is a timing chart showing a driving method when the liquid crystal display device 3d is powered on.
- the following preparation operation is performed before the first frame (vertical scanning period) of the display image.
- the AONB signal and the INITB signal are simultaneously activated (Low), and after the AONB signal returns to inactive (High), the INITB signal returns to inactive (High), and while the AONB signal is active,
- Each GCKB signal is fixed to active (Low).
- the AONB signal becomes active (Low)
- the OUTB signal becomes active (Low)
- all scanning signal lines are selected.
- Vcom is supplied to all the data signal lines. Further, in each stage flip-flop, the INITB signal is active (Low), so that the Q signal is Low (inactive) and the QB signal is High (inactive). Note that once the OUTB signal of each stage of the shift register becomes active, the feedback signal to the NAND becomes Low, so ASW5 is turned off and ASW6 is turned on (in each stage, GCK1B or GCK2B is captured). After the above preparatory operation is completed (after the AONB signal becomes inactive), Vcom is written to all PIX of the display unit DAR, and the shift register SR is initialized (the output of the flip-flop at each stage is (Inactive) state.
- the following operation is performed during each vertical scanning period (when each frame is displayed). That is, when the SB signal input to the own stage of the shift register SR becomes active (Low), the output of the own stage FF is set and activated, and the own stage takes in the GCKB signal.
- the self-stage GCKB signal becomes active (Low)
- the self-stage OUTB signal becomes active (Low)
- the next-stage SB signal becomes active
- the self-stage FF is reset so that the QB signal becomes High ( Inactive).
- the OUTB signal of the own stage is Low (that is, the output of the NAND is High)
- the GCKB signal is continuously taken into the own stage, and when the GCKB signal becomes High (inactive), The OUTB signal becomes High and the NAND output becomes Low. Thereafter, the AONB signal is output from the OUTB terminal, and the OUTB signal becomes High (inactive).
- both scanning signal lines are simultaneously selected when the power is turned on, and the same potential (for example, Vcom) can be written to all the pixels.
- Vcom the same potential
- both the SB signal and the RB signal are active as shown in FIG.
- both the SB signal and the RB signal are active ⁇ the SB signal is inactive and the RB signal is active ⁇ the flip-flop output even when the SB signal and the RB signal are both inactive.
- Q is always inactive (Low), and both the SB signal and the RB signal are active ⁇ the SB signal is active and the RB signal is inactive ⁇ the SB signal and the RB signal are both inactive as shown in FIG.
- the output Q of the flip-flop is instantaneous (the SB signal is active and the RB signal is inactive Otherwise though become period) indefinite blanking becomes inactive (Low). Therefore, it is possible to stabilize the operation of the shift register when returning from the simultaneous selection and after the return.
- the gate driver can be downsized as compared with the conventional configuration shown in FIG.
- the preparation operation can be completed more quickly than in the conventional configuration in which simultaneous selection and shift register initialization are performed separately. Further, since the self-reset at each stage is possible, the connection relationship between the stages can be simplified.
- the SB signal / RB signal becomes indefinite for a moment when the SB signal / RB signal transition as shown in FIG. Therefore, by using the flip-flop FF2x shown in FIG. 21 for the flip-flop FF in each stage of FIG. 19, the SB signal / RB signal can be made difficult to change as shown in FIG.
- the driving capability of p7 reset transistor RT
- p5 set transistor ST
- the flip-flop FF2y shown in FIG. 22 includes a P-channel transistor p6 and an N-channel transistor n5 that constitute a CMOS circuit, a P-channel transistor p8 and an N-channel transistor n7 that constitute a CMOS circuit, and P-channel transistors p5 and p7.
- the SB terminal is connected to the gate of p5 and the gate of n6, the RB terminal is connected to the source of nT, the gate of p7, and the gate of n8, and the INITB terminal is connected to the source of p6 and the gate of nT.
- the sources of p7 and p8 are connected to VDD, and the sources of n6 and n8 are connected to VSS.
- p6, n5, p8 and n7 constitute a latch circuit LC
- p5 functions as a set transistor ST
- p7 functions as a reset transistor RT
- n6 and n8 function as a latch release transistor (release transistor) LRT.
- FIG. 22 (b) is a timing chart showing the operation of FF2y
- FIG. 22 (c) is a truth table of FF2y.
- the Q signal of FF2y is low (inactive) and the SB signal is low (active) while the SB signal is low (active) and the RB signal is low (active).
- the RB signal is High (inactive)
- the SB signal is High (inactive) and the RB signal is Low (active)
- the SB signal is High (inactive).
- the RB signal is held (High) (inactive).
- both the SB signal and the R signal are active ⁇ the SB signal is active and the R signal is inactive ⁇ the flip-flop output Q is always inactive even if both the SB signal and the R signal are inactive. (Low).
- the flip-flop FF2z shown in FIG. 24 includes a P-channel transistor p6 and an N-channel transistor n5 that constitute a CMOS circuit, a P-channel transistor p8 and an N-channel transistor n7 that constitute a CMOS circuit, and P-channel transistors p5 and p7.
- p6, n5, p8 and n7 constitute a latch circuit LC
- p5 functions as a set transistor ST
- p7 functions as a reset transistor RT
- n6 and n8 function as a latch release transistor (release transistor) LRT.
- FIG. 24 (b) is a timing chart showing the operation of FF2z
- FIG. 24 (c) is a truth table of FF2z.
- the Q signal of FF2z is low (inactive) during the period when the SB signal is low (active) and the RB signal is low (active), and the SB signal is low (active).
- the RB signal is High (inactive)
- the SB signal is High (inactive) and the RB signal is Low (active)
- the SB signal is High (inactive).
- the RB signal is held (High) (inactive).
- the flip-flop FF2z when the SB signal is active (Low) and the RB signal is inactive (High) while the INITB terminal is active (Low), the p5 and p8 are turned on, and the Q signal is When low, the QB signal is high (inactive). Also, when the SB signal is active (Low) and the RB signal is active (Low) while the INITB terminal is active (Low), the Q signal is Low and the QB signal is High (inactive). When the SB signal is inactive (High) and the RB signal is inactive (High) while the INITB terminal is active (Low), both the Q signal and the QB signal are held. Accordingly, as shown in FIG. 23, both the SB signal and the R signal are active ⁇ the SB signal is active and the R signal is inactive ⁇ the flip-flop output Q is always inactive even if both the SB signal and the R signal are inactive. (Low).
- the NAND of FIG. 19 is preferably configured as shown in FIG.
- the source of the P-channel transistor p40 is connected to VDD
- the gate is the input X of the NAND
- the drain is the output M of the NAND
- the source of the P-channel transistor p41 is connected to VDD
- the gate is the input Y of the NAND
- the drain is connected to the source of the N-channel transistor n40
- the gate of the N-channel transistor n40 is connected to the input Y
- the drain is connected to the source of the N-channel transistor n41
- the gate of the N-channel transistor n41 is connected to the input X
- the drain is connected to VSS
- the drive capability of the P-channel transistors p40 and 41 is made larger than that of the N-channel transistors n40 and 41.
- FIG. 26 is a circuit diagram showing a configuration of a liquid crystal display device 3e according to the present invention.
- the liquid crystal display device 3e is a so-called CC (charge coupled) drive liquid crystal display device, and includes a display unit DAR, a gate / Cs driver G-CsD, a source driver SD, and a display control circuit DCC.
- the display control circuit DCC supplies the gate driver GD with a gate start pulse GSP, a gate on enable signal GOE, an AONB signal (simultaneous selection signal), an INITB signal, a CS inversion signal CMI1 and CMI2, and a gate clock signal GCK1B and GCK2B. .
- the display control circuit DCC supplies a source start pulse SSP, digital data DAT, a polarity signal POL, and a source clock signal SCK to the source driver SD.
- the gate / Cs driver G-CsD includes a shift register SR composed of a plurality of stages and a plurality of D latch circuits CSL.
- One OR circuit and one D latch circuit correspond to one stage of the shift register.
- CSL is provided.
- a D latch circuit CSLi is provided corresponding to the i-stage SRi of the shift register.
- the output signal (OUT signal) from the i-stage SRi of the shift register is supplied to the scanning signal line Gi of the display unit DAR via the buffer. Further, an output signal (out signal, CS signal) from the D latch circuit CSLi corresponding to the i-stage SRi is supplied to the storage capacitor line CSi of the display unit DAR.
- the OUT signal of the n-stage SRn is supplied to the scanning signal line Gn via the buffer, and the output signal (out signal, CS signal) from the D latch circuit CSLn corresponding to the n-stage SRn is held in the display unit DAR. It is supplied to the capacitor wiring CSn.
- the scanning signal line Gn is connected to the gate of a transistor connected to the pixel electrode in PIXn, and a storage capacitor (auxiliary capacitor) is formed between the pixel electrode in PIXn and the storage capacitor line CSn. .
- one analog switch asw and an inverter are provided corresponding to one data signal line, the input of this inverter is connected to the AONB signal line, and the end of the data signal line is one of the continuity of the analog switch asw.
- the other conduction terminal of the analog switch asw is connected to the Vcom (common electrode potential) power source, the N channel side gate of the analog switch asw is connected to the output of the inverter, and the P channel side gate of the analog switch asw is Connected to AONB signal line.
- FIG. 27 is a circuit diagram showing a configuration of i stage SRi of shift register SR shown in FIG.
- each stage of the shift register includes a flip-flop FF having the INITB terminal, the SB terminal, and the RB terminal (the flip-flops FF2, 2x, 2y, and 2z) and two analog switches ASW7 and ASW8.
- NAND, an inverter, a CKB terminal, and an ONB terminal the QB terminal of the flip-flop FF is connected to one input of the NAND, and the output (M) of the NAND is connected to the input of the inverter and the analog switch ASW7.
- the output of the inverter is connected to the N channel side gate of the analog switch ASW7 and the P channel side gate of the analog switch ASW8.
- One of the conductive electrodes is connected to the ONB terminal
- one conduction electrode of the analog switch ASW8 is connected to the CKB terminal, the other conduction electrode of the analog switch ASW7, the other conduction electrode of the analog switch ASW8, the OUTB terminal that is the output terminal of this stage, and the NAND Is connected to the RB terminal of the FF.
- the OUTB terminal is connected to the OUT terminal via an inverter.
- the i-stage SRi In the i-stage SRi, during the period when the QB signal (NAND input X) of the flip-flop FF is High (inactive), if the OUTB signal (NAND other input Y) is High (inactive), the NAND output ( M) becomes Low (analog switch ASW7 is ON and ASW8 is OFF), and AONB signal (inactive and Vdd) is output to OUTB terminal, while OUTB signal (the other input Y of NAND) is Low (active) If so, the output (M) of the NAND becomes High (the analog switch ASW7 is OFF and the ASW8 is ON), and the GCKB signal is captured and output from the OUTB terminal.
- the NAND input (M) is High because the one input X of the NAND is Low and the other input Y of the NAND is Low (the analog switch ASW7 is turned on).
- the analog switch ASW7 is turned OFF, the GCKB signal is captured and output from the OUTB terminal. That is, the NAND, the inverter, and the analog switches ASW1 and ASW2 (gate circuits) constitute a signal generation circuit that generates the OUTB signal.
- the analog switches ASW7 and ASW8 receive the AONB signal or the clock signal according to the output M of the NAND. Configure the gate circuit to capture.
- FIG. 28 is a circuit diagram showing a configuration of the D latch circuit CSLi corresponding to the i-stage SRi of the shift register SR shown in FIG.
- the D latch circuit CSLi includes three CMOS circuits 5 to 7, analog switches ASW15 and ASW16, an inverter, a CK terminal, a D terminal, and an out terminal.
- the CMOS circuits 5 and 6 the gates of one P-channel transistor and one N-channel transistor are connected to each other, the drains are connected to each other, and the source of the P-channel transistor is connected to VDD. Is connected to VSS.
- the gates of one P-channel transistor and one N-channel transistor are connected to each other, the drains are connected to each other, the source of the P-channel transistor is connected to the power supply VCSH, and the source of the N-channel transistor is the power supply This is a configuration connected to the VCSL.
- the ck terminal, the input of the inverter, the N channel side gate of the analog switch ASW16, and the P channel side gate of the analog switch ASW15 are connected, and the output of the inverter, the P channel side gate of the analog switch ASW16, and the N channel of the analog switch ASW15 Side gate is connected, the drain side of the CMOS circuit 5 is connected to one conduction terminal of the analog switch ASW15, one conduction terminal of the analog switch ASW16 is connected to the D terminal, and the other conduction of the analog switch ASW15 is connected.
- the terminal and the other conduction terminal of the analog switch ASW 16 are connected to the gate side of the CMOS circuit 6, the gate side of the CMOS circuit 5 and the drain side of the CMOS circuit 6 are connected, and the drain side of the CMOS circuit 6 and the CMOS circuit 7 are connected. The gate side of the It is continued, and the drain side and the out terminal of the CMOS circuit 7 is connected.
- the D latch circuit CSLi captures and latches the D signal (signal input to the D terminal) while the ck signal (signal input to the ck terminal) is active (High). That is, if the D signal changes from Low to High during the active period of the ck signal, the out signal (signal output from the out terminal) is raised from the potential of the power supply VCSL to the potential of the power supply VCSH and thereafter the potential of the power supply VCSH is increased. If the D signal changes from High to Low while the ck signal is active, the out signal (the signal output from the out terminal) drops from the potential of the power supply VCSH to the potential of the power supply VCSL, and then the power supply VCSL The potential will be maintained.
- the OUTB terminal of its own stage is connected to the SB terminal of the next stage. Further, the OUT terminal of the own stage is connected to one input terminal of the OR circuit corresponding to the own stage, and the OUT terminal of the next stage is connected to the other input terminal of the OR circuit corresponding to the own stage, The output of the OR circuit corresponding to the own stage is connected to the ck terminal of the D latch circuit corresponding to the own stage.
- the OUTB terminal of the n stage SRn is connected to the SB terminal of the (n + 1) stage SRn + 1, the OUT terminal of the n stage SRn is connected to one input terminal of the OR circuit corresponding to the n stage SRn, and (n + 1)
- the OUT terminal of stage SRn + 1 is connected to the other input terminal of the OR circuit corresponding to n stage SRn, and the output of the OR circuit corresponding to n stage SRn is connected to the ck terminal of D latch circuit CSLn corresponding to n stage SRn.
- the GSPB signal is input to the first stage SB terminal of the shift register SR.
- odd-numbered CKB terminals and even-numbered CKB terminals are connected to different GCK lines (lines for supplying GCK), and the INITB terminals of the flip-flops of the respective stages are connected to the INITB signal.
- the ONB terminals of each stage are connected to a common AONB line (line for supplying an AON signal).
- the CKB terminal of the n stage SRn is connected to the GCK2B signal line
- the CKB terminal of the (n + 1) stage SRn + 1 is connected to the GCK1B signal line
- the ONB terminals of the n stage SRn and the (n + 1) stage SRn + 1 are the same AONB signal.
- the D terminal is connected to a different CMI line (a line for supplying a CMI signal) for each of two D latch circuits corresponding to two consecutive stages.
- the D terminal of the D latch circuit CSLn corresponding to the n stage SRn is connected to the CMI2 signal line
- the D terminal of the D latch circuit CSLn + 1 corresponding to the (n + 1) stage SRn + 1 is connected to the CMI2 signal line
- the D terminal of the D latch circuit CSLn + 2 corresponding to SRn + 2 is connected to the CMI1 signal line
- the D terminal of the D latch circuit CSLn + 3 corresponding to the (n + 3) stage SRn + 3 is connected to the CMI1 signal line.
- FIG. 29 is a timing chart showing a driving method of the liquid crystal display device 3e.
- the cycle of the polarity signal POL is set to one horizontal scanning period 1H (that is, the polarity of the data signal supplied to the same data signal line is inverted every 1H), and CMI1 and CMI2 are in phase.
- the following display preparation operation is performed before the first frame (vertical scanning period) of the display image.
- the AONB signal and INITB signal are simultaneously activated (Low), the AONB signal returns to inactive (High), and then the INITB signal returns to inactive (High) in synchronization with the activation of GSPB.
- Each GCKB signal is fixed to active (low) while the AONB signal is active.
- Each CMI signal is fixed to High (or Low).
- Vcom is supplied to all the data signal lines.
- the INITB signal is active (Low), so that the Q signal is Low (inactive) and the QB signal is High (inactive).
- the OUTB signal of each stage of the shift register becomes active, the feedback signal to the NAND becomes Low, so ASW7 is turned off and ASW8 is turned on (GCK1B or GCK2B is taken in).
- each D latch circuit latches the CMI1 signal (Low) or the CMI2 signal (Low), and the out signal supplied to the storage capacitor wiring (CS signal) is the potential of the power supply VCSL.
- Vcom is written to all PIX of the display unit DAR, the QB output of the FF provided in each stage of the shift register is made inactive (High), and the out of each D latch circuit is output.
- the signal (the potential of the storage capacitor wiring) is set to the potential of the power supply VCSL.
- the OUTB signal of the own stage is Low (that is, the output of the NAND is High)
- the GCKB signal is continuously taken into the own stage, and when the GCKB signal becomes High (inactive), The OUTB signal becomes High and the NAND output becomes Low. Thereafter, the AONB signal is output from the OUTB terminal, and the OUTB signal becomes High (inactive).
- the D latch circuit corresponding to the own stage latches the CMI1 signal or the CMI2 signal, and further the next stage
- the D latch circuit corresponding to the own stage again latches the CMI1 signal or the CMI2 signal.
- the out signal of the D latch circuit corresponding to the self-stage (the potential of the storage capacitor wiring corresponding to the self-stage) is deactivated by the OUTB signal of the self-stage (the scanning signal line corresponding to the self-stage is OFF)
- the potential of the power supply VCSL is increased to the potential of the power supply VCSH (when a positive polarity data signal is written to the pixel corresponding to the self-stage) or the potential of the power supply VCSH is decreased to the potential of the power supply VCSL. (When a negative polarity data signal is written to the pixel corresponding to the own stage).
- the D latch circuit CSLn corresponding to the n stage SRn latches the CMI2 signal, and (n + 1) )
- D latch circuit CSLn latches the CMI2 signal again.
- the OUT signal of the D-stage latch circuit CSLn corresponding to the n-stage SRn (the potential of the storage capacitor line CSn corresponding to the n-stage SRn) becomes inactive (the corresponding to the n-stage SRn).
- the potential of the power supply VCSH is lowered to the potential of the power supply VCSL.
- a negative polarity data signal is written in the pixel PIXn corresponding to the n-stage SRn, as shown by POL, and the effective potential is lowered below the potential of the data signal by pushing down the storage capacitor line CSn. (The luminance of the pixel PIXn is increased).
- the D latch circuit CSLn + 1 corresponding to the (n + 1) stage SRn + 1 latches the CMI2 signal
- the D latch Circuit CSLn + 1 again latches the CMI2 signal.
- the out signal (potential of the storage capacitor wiring CSn + 1) of the D latch circuit CSLn + 1 corresponding to the (n + 1) stage SRn + 1 is deactivated (the scanning signal line Gn + 1 is turned ON / OFF). After turning off), the potential of the power supply VCSL is pushed up to the potential of the power supply VCSH.
- a positive polarity data signal is written in the pixel PIXn + 1 corresponding to the (n + 1) stage SRn + 1 as shown by POL, and the effective potential is made higher than the potential of the data signal by pushing up the storage capacitor wiring CSn + 1.
- the luminance can be increased (the luminance of the pixel PIXn + 1 is increased).
- the D latch circuit CSLn + 2 corresponding to the (n + 2) stage SRn + 2 latches the CMI1 signal
- the D latch Circuit CSLn + 2 again latches the CMI1 signal.
- the OUT signal of the D latch circuit CSLn + 2 corresponding to the (n + 2) stage SRn + 2 (potential of the storage capacitor line CSn + 2) is deactivated (the scanning signal line Gn + 2 is turned ON / OFF). After turning off, the potential of the power supply VCSH is pushed down to the potential of the power supply VCSL.
- a negative polarity data signal is written to the pixel PIXn + 2 corresponding to the (n + 2) stage SRn + 2 as shown by POL, and the effective potential is made to be lower than the potential of the data signal by pushing down the storage capacitor line CSn + 2. (The luminance of the pixel PIXn + 2 can be increased).
- the second and subsequent frames are displayed in the same manner as the first frame.
- the POL phase is shifted by a half cycle every frame, the polarity of the data signal supplied to the same pixel is inverted every frame.
- the push-up and push-down of the out signal (the potential of the storage capacitor wiring CSi) of the D latch circuit CSLi is also switched every frame.
- the liquid crystal display device 3e for example, all scanning signal lines are simultaneously selected when the power is turned on, and the same potential (for example, Vcom) can be written to all the pixels.
- Vcom the same potential
- the flip-flops of each stage of the shift register SR operate as shown in FIGS. 13 to 15 or FIG. Can be stabilized.
- the preparation operation can be completed more quickly than in the conventional configuration in which simultaneous selection and shift register initialization are performed separately. Further, since the self-reset at each stage is possible, the connection relationship between the stages can be simplified. In addition, since each pixel row can be appropriately CC-driven from the first frame, it is possible to eliminate screen distortion (horizontal stripe-like unevenness) of the first frame, which has been a problem with conventional CC driving.
- the phase of the CMI2 signal is shifted by a half cycle (from FIG. 29), and the cycle of the polarity signal POL is 2H (supplied to the same data signal line).
- the polarity of the data signal is inverted every 2H), and each pixel row can be appropriately CC-driven from the first frame.
- the period of the polarity signal POL can be switched from 1H to 2H only by controlling the phases of the CS inversion signals CMI1 and CMI2 signals, and screen disturbance at that time can be eliminated.
- FIG. 31 is a circuit diagram showing a configuration of a liquid crystal display device 3f according to the present invention.
- the liquid crystal display device 3f is a so-called CC (charge coupled) drive liquid crystal display device, and includes a display unit DAR, a gate / Cs driver G-CsD, a source driver SD, and a display control circuit DCC.
- the display control circuit DCC supplies the gate driver GD with a gate start pulse GSP, a gate on enable signal GOE, an INITB signal, an AONB signal (simultaneous selection signal), a CS inversion signal CMI1 and CMI2, and a gate clock signal GCK1B and GCK2B. .
- the display control circuit DCC supplies a source start pulse SSP, digital data DAT, a polarity signal POL, and a source clock signal SCK to the source driver SD.
- the gate / Cs driver G-CsD includes a shift register SR having a plurality of stages and a plurality of D latch circuits CSL.
- One inverter and one D latch circuit CSL are provided corresponding to one stage of the shift register. And one buffer.
- a D latch circuit CSLi is provided corresponding to the i-stage SRi of the shift register.
- the output signal (OUT signal) from the i-stage SRi of the shift register is supplied to the scanning signal line Gi of the display unit DAR via the buffer.
- the output signal (out signal, CS signal) from the D latch circuit CSLi corresponding to the i-stage SRi is supplied to the storage capacitor line CSi-1 of the display unit DAR.
- the OUT signal of the n-stage SRn is supplied to the scanning signal line Gn via the buffer, and the output signal (out signal, CS signal) from the D latch circuit CSLn corresponding to the n-stage SRn is held in the display unit DAR.
- the voltage is supplied to the capacitor wiring CSn-1.
- the scanning signal line Gn is connected to the gate of a transistor connected to the pixel electrode in PIXn, and a storage capacitor (auxiliary capacitor) is formed between the pixel electrode in PIXn and the storage capacitor line CSn.
- the scanning signal line Gn-1 is connected to the gate of a transistor connected to the pixel electrode in PIXn-1, and a storage capacitor (between the pixel electrode in PIXn-1 and the storage capacitor line CSn-1). Auxiliary capacity) is formed.
- one analog switch asw and an inverter are provided corresponding to one data signal line, the input of this inverter is connected to the AONB signal line, and the end of the data signal line is one of the continuity of the analog switch asw.
- the other conduction terminal of the analog switch asw is connected to the Vcom (common electrode potential) power source, the N channel side gate of the analog switch asw is connected to the output of the inverter, and the P channel side gate of the analog switch asw is Connected to AONB signal line.
- the configuration of the i-stage SRi of the shift register SR shown in FIG. 31 is as shown in FIG. 27, and the configuration of the D latch circuit CSLi is as shown in FIG.
- the OUTB terminal of its own stage is connected to the SB terminal of the next stage. Further, the M terminal of the own stage is connected to the ck terminal of the D latch circuit corresponding to the own stage.
- the OUTB terminal of the n stage SRn is connected to the SB terminal of the (n + 1) stage SRn + 1
- the M terminal of the n stage SRn is connected to the ck terminal of the D latch circuit CSLn corresponding to the n stage SRn.
- the GSPB signal is input to the first stage SB terminal of the shift register SR.
- odd-numbered CKB terminals and even-numbered CKB terminals are connected to different GCK lines (lines for supplying GCK), and INITB terminals of flip-flops at each stage are connected to INITB signal lines,
- the ONB terminals at each stage are connected to a common AONB line (line for supplying an AON signal).
- the CKB terminal of the n stage SRn is connected to the GCK2B signal line
- the CKB terminal of the (n + 1) stage SRn + 1 is connected to the GCK1B signal line
- the ONB terminals of the n stage SRn and the (n + 1) stage SRn + 1 are the same AONB signal.
- the D terminal is connected to a different CMI line (a line for supplying a CMI signal) for each of two D latch circuits corresponding to two consecutive stages.
- the D terminal of the D latch circuit CSLn-1 corresponding to the (n-1) stage SRn-1 is connected to the CMI1 signal line
- the D terminal of the D latch circuit CSLn corresponding to the n stage SRn is connected to the CMI1 signal line
- the D terminal of the D latch circuit CSLn + 1 corresponding to the (n + 1) stage SRn + 1 is connected to the CMI2 signal line
- the D terminal of the D latch circuit CSLn + 2 corresponding to the (n + 2) stage SRn + 2 is connected to the CMI2 signal line.
- FIG. 32 is a timing chart showing a driving method of the liquid crystal display device 3f.
- the cycle of the polarity signal POL is set to one horizontal scanning period 1H (that is, the polarity of the data signal supplied to the same data signal line is inverted every 1H), and CMI1 and CMI2 are in phase.
- the following display preparation operation is performed before the first frame (vertical scanning period) of the display image.
- the AONB signal and the INITB signal are simultaneously activated (Low), the AONB signal returns to the inactive (High), and then the INITB signal returns to the inactive (High) in synchronization with the activation of the GSPB.
- Each GCKB signal is fixed to active (low) while the AONB signal is active.
- Each CMI signal is fixed to High (or Low).
- the supplied out signal becomes the potential of the power supply VCSL.
- Vcom is written to all PIX of the display unit DAR, the QB outputs of the flip-flops provided in each stage of the shift register are inactive (High), and each D latch circuit
- the out signal (the potential of the storage capacitor wiring) is set to the potential of the power supply VCSL.
- the self-stage GCKB signal becomes active (Low)
- the self-stage OUTB signal becomes active (Low)
- the next-stage SB signal becomes active
- the self-stage FF is reset to High (inactive). It becomes.
- the OUTB signal of the own stage is Low (that is, the output of the NAND is High)
- the GCKB signal is continuously taken into the own stage, and when the GCKB signal becomes High (inactive), The OUTB signal becomes High and the NAND output becomes Low. Thereafter, the AONB signal is output from the OUTB terminal, and the OUTB signal becomes High (inactive).
- the D latch circuit corresponding to the next stage latches the CMI1 signal or the CMI2 signal.
- the out signal of the D latch circuit corresponding to the self-stage (the potential of the storage capacitor wiring corresponding to the self-stage) is deactivated by the OUTB signal of the self-stage (the scanning signal line corresponding to the self-stage is OFF)
- the potential of the power supply VCSL is increased to the potential of the power supply VCSH (when a positive polarity data signal is written to the pixel corresponding to the self-stage) or the potential of the power supply VCSH is decreased to the potential of the power supply VCSL. (When a negative polarity data signal is written to the pixel corresponding to the own stage).
- the D latch circuit CSLn corresponding to the n stage SRn latches the CMI1 signal.
- the out signal of the D latch circuit CSLn (the potential of the storage capacitor line CSn-1) becomes inactive when the OUT signal of the (n-1) stage SRn-1 is turned on (the scanning signal line Gn-1 is turned ON After turning off), the potential of the power supply VCSL is pushed up to the potential of the power supply VCSH.
- a positive polarity data signal is written in the pixel PIXn ⁇ 1 corresponding to the (n ⁇ 1) stage SRn ⁇ 1, as shown by POL.
- the potential can be made higher than the potential of the data signal (the luminance of the pixel PIXn-1 can be increased).
- the D latch circuit CSLn + 1 corresponding to the (n + 1) stage SRn + 1 latches the CMI2 signal.
- the out signal (the potential of the storage capacitor line CSn) of the D latch circuit CSLn + 1 becomes after the OUT signal of the n-stage SRn becomes inactive (the scanning signal line Gn corresponding to the n-stage SRn is turned ON / OFF). Then, the potential of the power supply VCSH is pushed down to the potential of the power supply VCSL.
- a negative polarity data signal is written in the pixel PIXn corresponding to the n-stage SRn, as shown by POL, and the effective potential is lowered below the potential of the data signal by pushing down the storage capacitor line CSn. (The luminance of the pixel PIXn is increased).
- the D latch circuit CSLn + 2 corresponding to the (n + 2) stage SRn + 2 latches the CMI2 signal.
- the out signal of the D latch circuit CSLn + 2 (the potential of the storage capacitor line CSn + 1) is not supplied to the power supply VCSL after the OUT signal of the (n + 1) stage SRn + 1 becomes inactive (the scanning signal line Gn + 1 is turned ON / OFF). The potential is pushed up from the potential to the potential of the power supply VCSH.
- a positive polarity data signal is written in the pixel PIXn + 1 corresponding to the (n + 1) stage SRn + 1 as shown by POL, and the effective potential is made higher than the potential of the data signal by pushing up the storage capacitor wiring CSn + 1.
- the luminance can be increased (the luminance of the pixel PIXn + 1 is increased).
- the second and subsequent frames are displayed in the same manner as the first frame.
- the POL phase is shifted by a half cycle every frame, the polarity of the data signal supplied to the same pixel electrode PIXi is inverted every frame.
- the push-up and push-down of the out signal (the potential of the storage capacitor wiring CSi) of the D latch circuit CSLi is also switched every frame.
- liquid crystal display device 3f for example, all scanning signal lines are simultaneously selected when the power is turned on, and the same potential (for example, Vcom) can be written to all the pixels, so that screen disturbance when the power is turned on can be eliminated.
- Vcom the same potential
- the flip-flops of each stage of the shift register SR operate as shown in FIGS. 13 to 15 or FIG. Can be stabilized.
- the gate driver can be downsized as compared with the conventional configuration shown in FIG.
- the preparation operation can be completed more quickly than in the conventional configuration in which simultaneous selection and shift register initialization are performed separately. Further, since the self-reset at each stage is possible, the connection relationship between the stages can be simplified.
- each pixel row can be appropriately CC-driven from the first frame, it is possible to eliminate screen distortion (horizontal stripe-like unevenness) of the first frame, which has been a problem with conventional CC driving.
- the phase of the polarity signal POL is supplied to the same data signal line by shifting the phase of the CMI2 signal by a half cycle (from FIG. 32).
- the polarity of the data signal is inverted every 2H), and each pixel row can be appropriately CC-driven from the first frame.
- the period of the polarity signal POL can be switched from 1H to 2H only by controlling the phases of the CS inversion signals CMI1 and CMI2 signals, and screen disturbance at that time can be eliminated.
- each stage of the shift register in the liquid crystal display devices 3e and 3f can be changed as shown in FIG. That is, the ASW 7 in FIG. 27 is a single channel (P channel) transistor TR. In this way, the shift register can be further reduced in size.
- the AONB signal may be inactive (High) during the simultaneous selection period as shown in FIG. 35, or the INITB signal may be activated by the AONB as shown in FIG. It may be made active (Low) after becoming (Low) and before becoming inactive (High), and the INITB signal is changed from AON being active (Low) to inactive (High) as shown in FIG. It may be active (Low) after becoming.
- gate driver source driver, or gate-CS driver and the pixel circuit of the display unit may be formed monolithically (on the same substrate).
- the output side of the two conductive electrodes of the transistor (P channel or N channel) is called a drain terminal.
- This display drive circuit is a display drive circuit equipped with a shift register that performs simultaneous selection of a plurality of signal lines at a predetermined timing, and an initialization signal is input to each stage of the shift register.
- Type flip-flop and a signal generation circuit that receives the simultaneous selection signal and generates the output signal of its own stage using the output of the flip-flop, and the output signal of each stage of the shift register.
- the initialization of the shift register (initialization of the flip-flops at each stage) is completed when the simultaneous selection is completed and the set signal and the reset signal are deactivated. Therefore, the operation of the shift register after completion of the simultaneous selection is stabilized as compared with the conventional driver (see FIGS. 38 and 39) in which the flip-flop is in an indefinite state after the simultaneous selection is completed until the INI signal is input. Can do.
- the signal generation circuit may include a gate circuit that selectively takes in a signal corresponding to an input switching signal and uses it as an output signal of its own stage.
- This display drive circuit may be configured such that the output of the flip-flop is input to the gate circuit as a switching signal.
- the signal generation circuit further includes a logic circuit, and the output of the flip-flop is input to the logic circuit, and the output of the logic circuit is input to the gate circuit as the switching signal, May be fed back to the logic circuit and the reset terminal of the flip-flop.
- the gate circuit may be configured to selectively capture the simultaneous selection signal or the clock signal.
- This display drive circuit may be configured to fix the clock signal to active while simultaneous selection is performed.
- the logic circuit may include a NAND.
- the NAND includes a plurality of P-channel transistors and a plurality of N-channel transistors.
- the drive capability of each P-channel transistor is higher than the drive capability of each N-channel transistor.
- a high configuration can also be achieved.
- the flip-flop includes a first CMOS circuit in which gate terminals and drain terminals of a P-channel first transistor and an N-channel second transistor are connected to each other, a P-channel third transistor and an N-channel transistor.
- a fourth CMOS circuit having a gate terminal and a drain terminal connected to each other, an input transistor, a plurality of input terminals, a first output terminal, and a second output terminal.
- the drain side of the 2CMOS circuit and the first output terminal are connected, the gate side of the second CMOS circuit, the drain side of the first CMOS circuit, and the second output terminal are connected, and the input transistor has a gate terminal and a source terminal
- Each may be configured to be connected to separate input terminals.
- the drain terminal of the input transistor may be connected to the first output terminal.
- the input transistor is a P-channel, and the source terminal of the input transistor is connected to an input terminal of a signal that is a first potential when inactive and a second potential lower than the first potential when active. It can also be set as the structure made.
- the plurality of input terminals include a set signal input terminal and a reset signal input terminal, and the input transistor has a gate terminal connected to the set signal input terminal.
- the source terminal may be a set transistor connected to the reset signal input terminal.
- the plurality of input terminals further include an input terminal for the initialization signal, and the input terminal for the initialization signal is connected to one of the source terminals of the first to fourth transistors. It can also be set as the structure made.
- the display driving circuit includes a reset transistor having a gate terminal connected to the reset signal input terminal, a source terminal connected to the first power supply line, and a drain terminal connected to the second output terminal. You can also.
- a release transistor having a gate terminal connected to the reset signal input terminal, a source terminal connected to the second power supply line, and a drain terminal connected to the source terminal of the second transistor; A terminal having a terminal connected to the input terminal of the set signal, a source terminal connected to the second power supply line, and a drain terminal connected to the source terminal of the fourth transistor. You can also.
- the display driving circuit includes a pixel electrode connected to the data signal line and the scanning signal line through a switching element, and a signal potential written to the pixel electrode in a storage capacitor wiring that forms a capacitor with the pixel electrode. It is also possible to adopt a configuration used for a display device that supplies a modulation signal in accordance with the polarity.
- one holding circuit is provided corresponding to each stage of the shift register, and a holding target signal is input to each holding circuit, and when the control signal generated in the own stage becomes active,
- the holding circuit corresponding to the stage captures and holds the above holding target signal, supplies the output signal of the own stage to the scanning signal line connected to the pixel corresponding to the own stage, and the holding circuit corresponding to the own stage.
- one holding circuit is provided corresponding to each stage of the shift register, and when a holding target signal is input to each holding circuit and a control signal generated in one stage is activated.
- the holding circuit corresponding to this stage takes in the holding target signal and holds it, supplies the output of one holding circuit as the modulation signal to the holding capacitor wiring, and the control signal generated at each stage is displayed. It is also possible to adopt a configuration that becomes active before the first vertical scanning period of the image.
- This display drive circuit may be configured to invert the polarity of the signal potential supplied to the data signal line every plural horizontal scanning periods.
- one holding circuit is provided corresponding to each stage of the shift register, and a holding target signal is input to each holding circuit, and the output signal of the own stage and the output of the subsequent stage of the own stage are output.
- Signal is input to the logic circuit, and when the output of the logic circuit becomes active, the holding circuit corresponding to the own stage takes in the holding target signal and holds it, and the output signal of the own stage is sent to the own stage.
- the output of the holding circuit corresponding to the own stage is supplied as the modulation signal to the holding capacitor wiring forming the capacitor and the pixel electrode of the pixel corresponding to the own stage.
- the phase of the holding target signal input to the plurality of holding circuits may be different from the phase of the holding target signal input to another plurality of holding circuits.
- one holding circuit is provided corresponding to each stage of the shift register, and a holding target signal is input to each holding circuit, and when the control signal generated in the own stage becomes active,
- the holding circuit corresponding to the stage captures and holds the above holding target signal, supplies the output signal of the own stage to the scanning signal line connected to the pixel corresponding to the own stage, and the holding circuit corresponding to the own stage.
- the polarity of the signal potential supplied to the data signal line is inverted every n horizontal scanning periods (n is a natural number) and the polarity of the signal potential supplied to the data signal line is m horizontal scanning. It can also be set as the structure which switches the mode reversed every period (m is a natural number different from n).
- This display panel is characterized in that the display driving circuit and the pixel circuit are monolithically formed.
- This display device includes the display driving circuit.
- the present invention is not limited to the above-described embodiments, and those obtained by appropriately modifying the above-described embodiments based on known techniques and common general knowledge or combinations thereof are also included in the embodiments of the present invention. It is. In addition, the operational effects described in each embodiment are merely examples.
- the shift register of the present invention is suitable for various drivers, particularly for liquid crystal display devices.
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Abstract
Description
図1は本発明にかかる液晶表示装置3aの構成を示す回路図である。液晶表示装置3aは、表示部DAR、ゲートドライバGD、ソースドライバSD、および表示制御回路DCCを備える。表示制御回路DCCは、ゲートドライバGDに、INITB信号(初期化信号)、AONB信号(同時選択信号)、ゲートスタートパルスGSP、ゲートオンイネーブル信号GOE、およびゲートクロック信号GCKB1・GCKB2を供給する。また、表示制御回路DCCは、ソースドライバSDに、ソーススタートパルスSSP、デジタルデータDAT、極性信号POL、およびソースクロック信号SCKを供給する。ゲートドライバGDには、複数段からなるシフトレジスタSRが含まれている。以下適宜、シフトレジスタのi段(i=1・・・n-1・n・n+1・・・)をi段SRiと略記する。
図18は本発明にかかる液晶表示装置3dの構成を示す回路図である。液晶表示装置3dは、表示部DAR、ゲートドライバGD、ソースドライバSD、および表示制御回路DCCを備える。表示制御回路DCCは、ゲートドライバGDに、INITB信号(初期化用信号)、AONB信号(同時選択信号)、ゲートスタートパルスGSP、ゲートオンイネーブル信号GOE、およびゲートクロック信号GCK1B・GCK2Bを供給する。また、表示制御回路DCCは、ソースドライバSDに、ソーススタートパルスSSP、デジタルデータDAT、極性信号POL、およびソースクロック信号SCKを供給する。ゲートドライバGDには、複数段からなるシフトレジスタSRが含まれている。以下適宜、シフトレジスタのi段(i=1・・・n-1・n・n+1・・・)をi段SRiと略記する。
図26は本発明にかかる液晶表示装置3eの構成を示す回路図である。液晶表示装置3eはいわゆるCC(charge coupled)駆動の液晶表示装置であり、表示部DAR、ゲート・CsドライバG-CsD、ソースドライバSD、および表示制御回路DCCを備える。表示制御回路DCCは、ゲートドライバGDに、ゲートスタートパルスGSP、ゲートオンイネーブル信号GOE、AONB信号(同時選択信号)、INITB信号、CS反転信号CMI1・CMI2、およびゲートクロック信号GCK1B・GCK2Bを供給する。また、表示制御回路DCCは、ソースドライバSDに、ソーススタートパルスSSP、デジタルデータDAT、極性信号POL、およびソースクロック信号SCKを供給する。ゲート・CsドライバG-CsDには、複数段からなるシフトレジスタSRと、複数のDラッチ回路CSLが含まれ、シフトレジスタの1段に対応して、1つのOR回路と、1つのDラッチ回路CSLとが設けられている。以下適宜、シフトレジスタのi段(i=1・・・n-1・n・n+1・・・)をi段SRiと略記する。また、シフトレジスタのi段SRiに対応して、Dラッチ回路CSLiが設けられている。
図31は本発明にかかる液晶表示装置3fの構成を示す回路図である。液晶表示装置3fはいわゆるCC(charge coupled)駆動の液晶表示装置であり、表示部DAR、ゲート・CsドライバG-CsD、ソースドライバSD、および表示制御回路DCCを備える。表示制御回路DCCは、ゲートドライバGDに、ゲートスタートパルスGSP、ゲートオンイネーブル信号GOE、INITB信号、AONB信号(同時選択信号)、CS反転信号CMI1・CMI2、およびゲートクロック信号GCK1B・GCK2Bを供給する。また、表示制御回路DCCは、ソースドライバSDに、ソーススタートパルスSSP、デジタルデータDAT、極性信号POL、およびソースクロック信号SCKを供給する。ゲート・CsドライバG-CsDには、複数段からなるシフトレジスタSRと、複数のDラッチ回路CSLが含まれ、シフトレジスタの1段に対応して、1つのインバータと、1つのDラッチ回路CSLと、1つのバッファとが設けられている。以下適宜、シフトレジスタのi段(i=1・・・n-1・n・n+1・・・)をi段SRiと略記する。また、シフトレジスタのi段SRiに対応して、Dラッチ回路CSLiが設けられている。
ASW9・ASW10 asw アナログスイッチ
SR シフトレジスタ
SRi シフトレジスタのi段
DCC 表示制御回路
GD ゲートドライバ
SD ソースドライバ
G-CsD ゲート-Csドライバ
DAR 表示部
Gn 走査信号線
CSn 保持容量配線
PIXn 画素
CSLi SRのi段に対応するDラッチ回路
FF フリップフロップ
ST セットトランジスタ(入力トランジスタ)
RT リセットトランジスタ(入力トランジスタ)
LRT ラッチ解除トランジスタ
LC ラッチ回路
POL (データ)極性信号
CMI1 CMI2 CS反転信号
Claims (24)
- シフトレジスタを備え、所定のタイミングで複数の信号線の同時選択を行う表示駆動回路であって、
上記シフトレジスタの各段に、初期化用信号が入力されるセットリセット型フリップフロップと、同時選択信号が入力され、上記フリップフロップの出力を用いて自段の出力信号を生成する信号生成回路とが設けられ、
上記シフトレジスタの各段の出力信号は、上記同時選択信号のアクティブ化によりアクティブとなって上記同時選択が行われる間アクティブとされ、
上記フリップフロップの出力は、初期化用信号がアクティブであれば、セット用信号およびリセット用信号それぞれがアクティブであっても非アクティブであっても、非アクティブとなり、
上記初期化用信号が、同時選択の終了前にアクティブとされ、終了後に非アクティブとされることを特徴とする表示駆動回路。 - 上記信号生成回路は、入力される切り替え信号に応じた信号を選択的に取り込んで自段の出力信号とするゲート回路を備えることを特徴とする請求項1記載の表示駆動回路。
- 上記フリップフロップの出力が切り替え信号としてゲート回路に入力されていることを特徴とする請求項2記載の表示駆動回路。
- 上記信号生成回路はさらに論理回路を備え、
上記フリップフロップの出力が論理回路に入力され、該論理回路の出力が上記切り替え信号としてゲート回路に入力され、自段の出力信号が該論理回路と上記フリップフロップのリセット用端子とにフィードバックされていることを特徴とする請求項2記載の表示駆動回路。 - 上記ゲート回路は、上記同時選択信号またはクロック信号を選択的に取り込むことを特徴とする請求項2記載の表示駆動回路。
- 同時選択が行われる間は上記クロック信号をアクティブに固定することを特徴とする請求項5記載の表示駆動回路。
- 上記論理回路にNANDが含まれていることを特徴とする請求項4記載の表示駆動回路。
- 上記NANDは複数のPチャネルのトランジスタと複数のNチャネルのトランジスタとからなり、該NANDでは、Pチャネルの各トランジスタの駆動能力が、Nチャネルの各トランジスタの駆動能力よりも高いことを特徴とする請求項7記載の表示駆動回路。
- 上記フリップフロップは、Pチャネルの第1トランジスタとNチャネルの第2トランジスタのゲート端子同士およびドレイン端子同士が接続された第1CMOS回路と、Pチャネルの第3トランジスタとNチャネルの第4トランジスタのゲート端子同士およびドレイン端子同士が接続された第2CMOS回路と、入力トランジスタと、複数の入力端子と、第1および第2出力端子とを備え、第1CMOS回路のゲート側と第2CMOS回路のドレイン側と第1出力端子とが接続されるとともに、第2CMOS回路のゲート側と第1CMOS回路のドレイン側と第2出力端子とが接続され、上記入力トランジスタは、ゲート端子およびソース端子それぞれが別々の入力端子に接続されていることを特徴とする請求項1記載の表示駆動回路。
- 上記入力トランジスタのドレイン端子は第1出力端子に接続されていることを特徴とする請求項9記載の表示駆動回路。
- 上記入力トランジスタはPチャネルであって、該入力トランジスタのソース端子は、非アクティブ時に第1電位でアクティブ時に第1電位よりも低い第2電位となる信号の入力端子に接続されていることを特徴とする請求項9記載の表示駆動回路。
- 上記複数の入力端子に、セット用信号の入力端子とリセット用信号の入力端子とが含まれ、上記入力トランジスタは、ゲート端子がセット用信号の入力端子に接続されるとともにソース端子がリセット用信号の入力端子に接続されたセットトランジスタであることを特徴とする請求項9に記載の表示駆動回路。
- 上記複数の入力端子に、さらに上記初期化用信号の入力端子が含まれ、この初期化用信号の入力端子が第1~第4トランジスタのいずれか1つのソース端子に接続されていることを特徴とする請求項9記載の表示駆動回路。
- ゲート端子がリセット用信号の入力端子に接続されるとともにソース端子が第1電源ラインに接続され、かつドレイン端子が第2出力端子に接続されたリセットトランジスタを備えることを特徴とする請求項9記載の表示駆動回路。
- ゲート端子がリセット用信号の入力端子に接続されるとともにソース端子が第2電源ラインに接続され、かつドレイン端子が第2トランジスタのソース端子に接続されたリリーストランジスタと、ゲート端子がセット用信号の入力端子に接続されるとともにソース端子が第2電源ラインに接続され、かつドレイン端子が第4トランジスタのソース端子に接続されたリリーストランジスタとの、少なくとも一方を備えることを特徴とする請求項14記載の表示駆動回路。
- スイッチング素子を介してデータ信号線および走査信号線に接続される画素電極を備えるとともに、該画素電極と容量を形成する保持容量配線に、該画素電極に書き込まれた信号電位の極性に応じた変調信号を供給する表示装置に用いられる請求項1~15のいずれか1項に記載の表示駆動回路。
- 上記シフトレジスタの各段に対応して保持回路が1つずつ設けられるとともに、各保持回路に保持対象信号が入力され、自段で生成された制御信号がアクティブになると自段に対応する保持回路が上記保持対象信号を取り込んでこれを保持し、
自段の出力信号を、自段に対応する画素と接続する走査信号線に供給するとともに、自段に対応する保持回路の出力を、自段よりも前の段に対応する画素の画素電極と容量を形成する保持容量配線に、上記変調信号として供給することを特徴とする請求項16記載の表示駆動回路。 - 上記シフトレジスタの各段に対応して保持回路が1つずつ設けられるとともに、各保持回路に保持対象信号が入力され、
1つの段で生成された制御信号がアクティブになるとこの段に対応する保持回路が上記保持対象信号を取り込んでこれを保持し、
1つの保持回路の出力を、上記変調信号として保持容量配線に供給し、
各段で生成される制御信号が、表示映像の最初の垂直走査期間よりも前にアクティブとなることを特徴とする請求項16記載の表示駆動回路。 - 上記データ信号線に供給される信号電位の極性を複数水平走査期間ごとに反転させることを特徴とする請求項16記載の表示駆動回路。
- 上記シフトレジスタの各段に対応して保持回路が1つずつ設けられるとともに、各保持回路に保持対象信号が入力され、
自段の出力信号と自段よりも後段の出力信号とが論理回路に入力されるとともに、該論理回路の出力がアクティブになると自段に対応する保持回路が上記保持対象信号を取り込んでこれを保持し、
自段の出力信号を、自段に対応する画素と接続する走査信号線に供給するとともに、自段に対応する保持回路の出力を、自段に対応する画素の画素電極と容量を形成する保持容量配線に、上記変調信号として供給し、
複数の保持回路に入力される保持対象信号の位相と、別の複数の保持回路に入力される保持対象信号の位相とを異ならせていることを特徴とする請求項19記載の表示駆動回路。 - 上記シフトレジスタの各段に対応して保持回路が1つずつ設けられるとともに、各保持回路に保持対象信号が入力され、自段で生成された制御信号がアクティブになると自段に対応する保持回路が上記保持対象信号を取り込んでこれを保持し、
自段の出力信号を、自段に対応する画素と接続する走査信号線に供給するとともに、自段に対応する保持回路の出力を、自段よりも前の段に対応する画素の画素電極と容量を形成する保持容量配線に、上記変調信号として供給し、
複数の保持回路に入力される保持対象信号の位相と、別の複数の保持回路に入力される保持対象信号の位相とを異ならせていることを特徴とする請求項19記載の表示駆動回路。 - 上記データ信号線に供給される信号電位の極性をn水平走査期間(nは自然数)ごとに反転させるモードと、データ信号線に供給される信号電位の極性をm水平走査期間(mはnと異なる自然数)ごとに反転させるモードとを切り替えることを特徴とする請求項19記載の表示駆動回路。
- 請求項1~22のいずれか1項に記載の表示駆動回路と画素回路とがモノリシックに形成されていることを特徴とする表示パネル。
- 請求項1~22のいずれか1項に記載の表示駆動回路を備えることを特徴とする表示装置。
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EP10789136.8A EP2444957A4 (en) | 2009-06-17 | 2010-03-18 | DISPLAY ACTUATOR, DISPLAY BOARD AND DISPLAY DEVICE |
RU2012100265/08A RU2487424C1 (ru) | 2009-06-17 | 2010-03-18 | Схема возбуждения дисплея, дисплейная панель и устройство отображения |
BRPI1011944A BRPI1011944A2 (pt) | 2009-06-17 | 2010-03-18 | "circuito de acionamento de exibição, painel de exibição e dispositivo de exibição" |
JP2011519490A JP5459726B2 (ja) | 2009-06-17 | 2010-03-18 | 表示駆動回路、表示パネル、表示装置 |
CN201080026979.XA CN102460559B (zh) | 2009-06-17 | 2010-03-18 | 显示驱动电路、显示面板、显示装置 |
US13/378,233 US8970565B2 (en) | 2009-06-17 | 2010-03-18 | Display driving circuit, display panel and display device |
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EP (1) | EP2444957A4 (ja) |
JP (1) | JP5459726B2 (ja) |
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BR (1) | BRPI1011944A2 (ja) |
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JPWO2010146751A1 (ja) | 2012-11-29 |
CN102460559B (zh) | 2014-04-02 |
EP2444957A1 (en) | 2012-04-25 |
BRPI1011944A2 (pt) | 2016-04-26 |
US8970565B2 (en) | 2015-03-03 |
JP5459726B2 (ja) | 2014-04-02 |
RU2487424C1 (ru) | 2013-07-10 |
EP2444957A4 (en) | 2014-11-05 |
CN102460559A (zh) | 2012-05-16 |
US20120105395A1 (en) | 2012-05-03 |
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