WO2006035843A1 - タイミング信号生成回路、電子デバイス、表示装置、受像装置、及び駆動方法 - Google Patents
タイミング信号生成回路、電子デバイス、表示装置、受像装置、及び駆動方法 Download PDFInfo
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- WO2006035843A1 WO2006035843A1 PCT/JP2005/017895 JP2005017895W WO2006035843A1 WO 2006035843 A1 WO2006035843 A1 WO 2006035843A1 JP 2005017895 W JP2005017895 W JP 2005017895W WO 2006035843 A1 WO2006035843 A1 WO 2006035843A1
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- timing
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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
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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
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
Definitions
- Timing signal generating circuit electronic device, display device, image receiving device, and driving method
- the present invention relates to a timing signal generation device, an electronic device and a display device, and a driving method of an electronic device, and more specifically, a timing signal generation device that contributes to reduction of power consumption and the timing.
- the present invention relates to an electronic device including a signal generation device, a display device, and a driving method of the electronic device.
- a matrix type display device in which pixels are arranged in a matrix as an example of a drive circuit that drives display pixels in which electronic elements are arranged in an array.
- a matrix display device for example, an active matrix liquid crystal display device is well known.
- FIG. 4 schematically shows an example of a schematic configuration of a conventional active matrix liquid crystal display device.
- the liquid crystal display device 500 includes a liquid crystal display panel 501, a source driver 502, a gate driver 503, and a liquid crystal display control circuit 504.
- a liquid crystal display panel 501 is a liquid crystal display panel in which pixel electrodes for display and TFT transistors for applying a voltage to the pixel electrodes are arranged in a matrix on a substrate.
- the source driver 502 is disposed on the upper side of the liquid crystal display panel 501, and the gate driver 503 is disposed on the left side of the liquid crystal display panel 501, and is connected to the source driver 502 with one line in the horizontal direction!
- the display data latched in units is DZA converted and written as grayscale voltages to the pixel electrodes of the liquid crystal display panel 501 in units of one line in the horizontal direction from top to bottom.
- a voltage may be applied and the liquid crystal transmission between the electrodes may be controlled and displayed according to the applied voltage value.
- the liquid crystal display control circuit 504 generates various timing signals for image display, controls the source driver 502 and the gate driver 503, and drives the liquid crystal display panel 501.
- the liquid crystal display control circuit 504 outputs the various timing signals.
- FIG. 5 is a circuit block diagram schematically showing the configuration of the timing signal generation device 300.
- the timing signal generation device 300 includes a counter initialization circuit 31, a horizontal direction counter 32, a vertical direction counter 33, and a signal generation circuit group 34.
- the counter initialization circuit 31 includes a horizontal reference signal (hereinafter “H signal”) and a vertical reference signal (hereinafter “H signal”).
- H signal horizontal reference signal
- H signal vertical reference signal
- V signal Input “V signal” below) and clock signal (hereinafter “CLK signal”), horizontal counter
- Control signals are output to 32 and the vertical direction counter 33, respectively.
- the horizontal counter 32 receives the CLK signal, counts the number of clocks, and supplies it to a horizontal decoder (not shown) of the signal generation circuit group 34. Also, the horizontal counter 32 resets the count when a control signal synchronized with the H signal is supplied from the counter initialization circuit 31.
- the vertical counter 33 inputs the CLK signal and the H signal, and the H signal
- the number of signal pulses is counted in synchronization with the CLK signal and supplied to a vertical decoder (not shown) of the signal generation circuit group 34.
- the vertical direction counter 33 is connected to the counter initialization circuit 31 from the V
- control signal output from the counter initialization circuit 31 functions as a count reset signal.
- the signal generation circuit group 34 includes a plurality of signal generation circuits for generating various timing signals for driving the liquid crystal display device.
- SSP signal shift start signal
- GSP signal bus line selection start signal
- GCK signal shift clock signal
- FRP signal shift clock signal
- FRP circuit 34d and source driver 502 scan direction switching signal (hereinafter referred to as “LR signal”)
- LR signal LR circuit 34e and gate driver 503 no-line selection signal width control signal
- PWC circuit 34f for generating precharge control signal (hereinafter referred to as “PCTL signal”) 34g for generating a precharge control signal (hereinafter referred to as “UD
- FIG. 6 (a) and FIG. 6 (b) are timing charts in the timing signal generator described above.
- 6 (a) is a timing chart in the horizontal direction
- FIG. 6 (b) is a diagram showing a timing chart in the vertical direction.
- FIG. 6 (a) shows the H signal, SSP signal, LR signal, GCK signal, PWC signal, P
- the operation period of the CTL signal, the FRP signal, and the horizontal counter 32 is shown.
- the SSP signal has the H signal “Low” and then "High” again.
- the LR signal, GCK signal, PWC signal, PCTL signal, and FRP signal are set to “Low” and “High” again.
- the transition point is configured to occur shortly before the next H signal becomes “Low”.
- a horizontal effective display period T92 horizontal effective display area
- the horizontal effective display period ⁇ 92 is the period from when the SSP change point is output and the horizontal scan is completed, and any horizontal effective display period ⁇ 92 to the next horizontal
- the horizontal blanking period is between the effective display period ⁇ 92 and various timing signals such as the LR signal, GCK signal, PWC signal, PCTL signal, and FRP signal are changed within the horizontal blanking period. It is configured as follows.
- the horizontal direction counter 32 needs to count the number of clocks up to a position (mainly a change point) where a signal output from the signal generation circuit group 34 is required. For this reason, the horizontal direction counter 32 waits for the next H after the ⁇ signal becomes “Low” and becomes “High” again.
- the horizontal counter 32 continues to count without stopping the power count during one horizontal scanning period T91.
- the vertical timing chart shown in Fig. 6 (b) shows the V signal, H signal, SSP signal, GCK signal, and PWC signal.
- 94 includes vertical effective display period T95 (vertical effective display area) and vertical blanking during the period from the output of the last horizontal video signal to the input of the next horizontal scanning signal ⁇ 94 first horizontal video signal. There is a period ⁇ 96.
- the SSP signal In the vertical blanking period ⁇ 96, it is common to stop various signals such as the SSP signal to reduce power consumption. Therefore, as shown in Fig. 6 (b), the SSP signal, GCK The signal, the WC signal, and the PCTL signal are configured such that a change point occurs within the vertical effective display period ⁇ 95.
- the GSP signal becomes “High” again when the V signal becomes “Low”.
- the vertical counter 33 needs to determine the start position of the vertical blanking period T96, it is necessary to count at least within the vertical effective display period T95. Normally, the vertical blanking period T96 is also It is configured to count. Therefore, as with the horizontal counter 32, the vertical counter 33 also changes to “Hig” again when the V signal becomes “Low”.
- JP-A-8-305316 (published: November 22, 1996) (hereinafter referred to as "special In the image display device having a large power consumption in a drive circuit such as an image display device in which a pixel array and a drive circuit are monolithically formed on a polycrystalline silicon thin film, it is included in the video signal.
- An image display device that can greatly reduce power consumption in the drive circuit by stopping the supply of signals to the drive circuit or the supply of signals to the data signal lines in synchronization with the vertical and horizontal blanking periods. Is disclosed.
- Patent Document 2 Japanese Patent Laid-Open No. 10-11033 (published: January 16, 1998) (hereinafter referred to as "Patent Document 2" t)
- a stop means is interposed between the timing generator and the liquid crystal display panel so that the video driver is turned on when the power is turned on.
- the video signal output from the camera stabilizes, at least one of the vertical start pulse and horizontal start pulse repeatedly input to the vertical scanner and horizontal scanner is stopped, and an unstable video signal is written to the liquid crystal pixels.
- a liquid crystal display device and a driving method for preventing the same are disclosed.
- the horizontal counter 32 counts the number of clocks continuously during one horizontal scanning period
- the vertical direction counter 33 counts the number of clocks continuously during one vertical scanning period. It is necessary to continue. For this reason, the configuration of the conventional timing signal generation device 300 has a problem that power consumption increases.
- Patent Document 1 discloses a technique for saving power by stopping signal supply during the blanking period
- Patent Document 2 discloses supplying a start pulse at a predetermined time.
- the power disclosed for the technology to stop The disclosure and suggestion of the technology for suppressing the power consumption by the counter in the timing signal generator 300 are disclosed and suggested in any of these patent documents!
- the present inventors considered that it is necessary to develop a technique for reducing the power consumption by the counter in the timing signal generation device in the liquid crystal display control device. Furthermore, since the timing signal generating device is used in general for matrix display devices, it can be said that such a problem potentially exists in general for matrix display devices.
- the present invention has been made in view of the above problems, and its purpose is to enable power saving. It is an object of the present invention to provide a timing signal generation unit, a matrix type display device including the timing signal generation unit, and a driving method thereof. Disclosure of the invention
- the timing signal generating device outputs at least a reference signal and outputs a timing signal to a drive circuit for driving electronic elements arranged in an array.
- a timing signal generating device that performs a counting operation based on the reference signal, a signal generation circuit that generates the timing signal according to a count output of the counter unit, and an arbitrary reference signal And a count stop means capable of stopping the count operation of the counter means before the next reference signal is inputted after the input.
- the counting of the counter means can be operated during a period requiring the counting operation, and then stopped. For this reason, since the operation stop period of the counter means occurs, the power consumption can be reduced.
- the timing signal generation device receives at least a clock signal and a horizontal reference signal and is driven horizontally to drive electronic elements arranged in a matrix.
- a timing signal generating device for outputting a timing signal to a circuit, wherein the horizontal direction counter means performs a clock signal counting operation on the basis of the horizontal reference signal, and the counter according to the count output of the horizontal direction counter means
- the count of the horizontal direction counter means can be operated during a period requiring the count operation, and then stopped. For this reason, since the operation stop period of the horizontal direction counter means occurs, the power consumption can be reduced.
- the timing signal generation device receives at least a horizontal reference signal and a vertical reference signal, and drives a vertical drive for driving electronic elements arranged in a matrix.
- Timing signal generation that outputs timing signals to the circuit
- a vertical direction counter means for outputting the number of pulses of the horizontal reference signal based on the vertical reference signal, and a signal for generating the timing signal according to the count output of the vertical direction counter means
- a vertical counter stop means capable of stopping the counting operation of the vertical direction counter means during a period in which the next vertical reference signal is input after an arbitrary vertical reference signal is input. It is a characteristic.
- the count of the vertical direction counter means can be operated during a period requiring the count operation, and then stopped. For this reason, since the operation stop period of the vertical direction counter means is generated, the power consumption can be reduced.
- the timing signal generation device includes electronic elements arranged in a matrix and receiving at least a horizontal reference signal, a vertical reference signal, and a clock signal.
- a timing signal generation device that generates and outputs a timing signal to a horizontal drive circuit and a vertical drive circuit for driving, wherein the timing signal generation device counts the number of clock signals based on a horizontal reference signal.
- a timing signal generating device that generates an arbitrary horizontal signal.
- Horizontal counter stop means that can stop the counting operation of the horizontal counter means during the period in which the quasi-signal is input and the next horizontal reference signal is input, and any vertical reference signal is input and the force order Vertical counter stopping means capable of stopping the counting operation of the vertical direction counter means during a period in which the vertical reference signal is input.
- the counting of the horizontal direction counter means and the vertical direction counter means can be operated during a period requiring the counting operation, and then stopped. For this reason, since the operation stop period of the horizontal direction counter means and the vertical direction counter means is generated, the power consumption can be reduced.
- the timing signal generation device provides a clock. And a vertical reference signal, and a timing signal generating device that outputs a timing signal to a drive circuit for driving electronic elements arranged in a matrix, wherein the vertical reference signal is used as a reference.
- a vertical force counter stopping means capable of stopping the counting operation of the vertical counter means during a period until it is performed.
- the count of the vertical direction counter means can be operated during a period requiring the count operation and then stopped. For this reason, since the operation stop period of the vertical direction counter means is generated, the power consumption can be reduced.
- the timing signal generation device starts the counting operation of the horizontal direction counter means after the horizontal reference signal is input, After generating the signal change point, it is preferable to include a control unit that stops the counting operation of the horizontal counter means by the horizontal counter stopping means and stops the counting operation until the next horizontal reference signal is input.
- the signal generating circuit group generates a change point in the timing signal while the horizontal counter means is counting. For this reason, it is possible to reliably count to the position (mainly the change point) required by the signal output from the signal generation circuit group.
- the timing signal generation device starts the counting operation of the vertical direction counter means after the vertical reference signal is input, It is preferable to include a control unit that stops the count operation of the vertical counter means by the vertical counter stop means after generating the signal change point and stops the count operation until the next vertical reference signal is input.
- the counting of the vertical direction counter means is stopped. Normally, the effective display area begins after a change point occurs in the timing signal.
- the vertical counter means assigns the start position of the effective display area. If it can be issued, there is no need to count thereafter. For this reason, it can contribute to reduction of power consumption after that.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form, and the signal generation circuit is arranged in the horizontal direction. It is preferable that the change point of all timing signals generated within one horizontal scanning period of the video signal is generated within the period during which the counter means is counting.
- the signal generation circuit group generates a change point in the timing signal while the horizontal counter means is counting. For this reason, it is possible to reliably count to the position (mainly the change point) required by the signal output from the signal generation circuit group.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form, and the horizontal counter stop means includes an arbitrary horizontal reference signal. Between the time when a change point occurs in all timing signals generated by the signal generation circuit within one horizontal scanning period of the video signal and the time when a new horizontal reference signal is input. It is preferable that the control is performed so as to have a period during which the counting of the horizontal direction counter means is stopped.
- the signal generating circuit group generates a change point in the timing signal while the horizontal counter means is counting. For this reason, it is possible to reliably count to the position (mainly the change point) required by the signal output from the signal generation circuit group.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form
- the vertical counter stop means includes an arbitrary Between the time when a vertical reference signal is input and a change point occurs in all timing signals generated by the signal generation circuit within one vertical scanning period of the video signal, until a new vertical reference signal is input Further, it is preferable that the control is performed so as to have a period during which the counting of the vertical direction counter means is stopped.
- the vertical direction counter Stop counting means Normally, the effective display area begins after a change point occurs in the timing signal. If the vertical counter means can determine the start position of the effective display area, it does not need to count thereafter. For this reason, it can contribute to reduction of power consumption after that.
- the electronic elements arranged in a matrix are display pixels arranged in a matrix, and the signal generation circuit is at least A plurality of timing signals including a circuit for generating a shift start signal for a horizontal drive circuit are generated.
- the shift start signal for the horizontal drive circuit is a horizontal scan of a video signal after an arbitrary horizontal reference signal is input.
- a change point is generated at the latest timing among all timing signals generated by the signal generation circuit within the period, and the horizontal counter stop means receives an arbitrary horizontal reference signal. After a change point occurs in the shift start signal of the source drive circuit generated by the signal generation circuit, a new horizontal reference signal is input.
- A it is preferable that is controlled to have a period to stop the counting of the horizontal counter means.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form, and the signal generation circuit is at least a vertical drive circuit.
- a plurality of timing signals including a circuit for generating a shift start signal, and the vertical counter stop means receives an arbitrary vertical reference signal and generates a signal from a vertical drive circuit generated by the signal generation circuit. It is preferable that the control is performed so as to have a period in which the counting of the vertical counter means is stopped after a change point occurs in the shift start signal and before a new horizontal reference signal is input. .
- the vertical direction count is The counting of the data means is stopped. Normally, the effective display area begins after a change point occurs in the GSP signal. If the vertical counter means can determine the start position of the effective display area, it does not need to count thereafter. For this reason, it can contribute to reduction of power consumption after that.
- the electronic elements arranged in a matrix are display pixels arranged in a matrix, and the timing signal generation device is an arbitrary one.
- the horizontal blanking period of the video signal starts, and then the horizontal effective display period starts.
- the horizontal effective display period continues until the next horizontal reference signal is input.
- the horizontal counter stopping means controls the horizontal counter means so that the horizontal direction counter means counts at least in the horizontal blanking period and then stops counting until the next horizontal reference signal is input. I prefer to be the one to control.
- the signal generation circuit changes the transition points in all timing signals generated within one horizontal scanning period within the horizontal blanking period that starts immediately after the horizontal reference signal is input.
- the horizontal direction counter means counts at least during this horizontal blanking period, and then stops the force count at a predetermined time until the change timing of the signal output from the signal generation circuit is reached. Can be counted reliably, and then power consumption can be reduced by stopping the counting.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form
- the timing signal generation apparatus comprises an arbitrary vertical reference
- the vertical blanking period of the video signal starts, then the vertical effective display period starts, and the vertical effective display period continues until the next vertical reference signal is input.
- the vertical counter stopping means controls the vertical counter means to have a period during which at least the vertical blanking period is counted, and thereafter the count is stopped until the next vertical reference signal is input. Is preferred to be.
- the vertical direction counter means includes at least the vertical blanking period. Count.
- the vertical direction counter means needs to continue counting to the position where the start position of the vertical effective display period (vertical effective display area) can be determined. In this case, if at least the vertical blanking period is counted, the vertical effective display period The start position of (vertical effective display area) can be determined. Therefore, power consumption can be reduced by stopping the vertical counter means at an arbitrary position after the end of the vertical blanking period.
- the electronic elements arranged in the matrix are display pixels arranged in a matrix, and the timing signal generation device is an arbitrary After the horizontal reference signal is input, the horizontal blanking period of the video signal starts, and then the horizontal effective display period starts, and the horizontal effective display period is set to continue until the next horizontal reference signal is input.
- the horizontal counter stop means controls the horizontal counter means to count only during the horizontal blanking period, and then stop until the next horizontal reference signal is input. .
- the horizontal direction counter means counts only during the horizontal blanking period. For this reason, since the horizontal direction counter means is stopped at an arbitrary position after the end of the horizontal blanking period, power saving can be achieved. In this case, the horizontal direction counter means functions to determine the horizontal effective display start position.
- the electronic elements arranged in a matrix form are display pixels arranged in a matrix form
- the timing signal generation apparatus comprises an arbitrary horizontal reference
- the horizontal blanking period of the video signal starts, then the horizontal effective display period starts, and the horizontal effective display period is set until the next horizontal reference signal is input.
- the horizontal counter stopping means controls the horizontal counter means to count only during the horizontal blanking period and then stop until the next horizontal reference signal is input. .
- the vertical direction counter means counts only during the vertical blanking period. Do. For this reason, since the counting operation is stopped after the end of the vertical blanking period, power saving can be achieved.
- the timing signal generation device receives at least a reference signal and outputs a signal to a drive circuit for driving electronic elements arranged in an array.
- a timing signal generating device for output comprising: counter means for performing a counting operation based on the reference signal; and a signal generating circuit for generating the timing signal in accordance with a count output of the counter means.
- the means is formed by a number of bits that is smaller than the number of bits required to express in binary a number obtained by dividing one period of the reference signal by one period of the signal counted by the counter means. It is characterized by this.
- the number of bits of the horizontal direction counter means is reduced, so that the circuit size can be reduced. For this reason, the power consumption can be reduced and the circuit area power can be reduced. Furthermore, the amount of wiring from the horizontal counter means to the signal generation circuit can be reduced, and the circuit area (frame area) can be reduced.
- the timing signal generation device receives at least a reference signal and outputs a timing signal to a driving circuit for driving electronic elements arranged in a matrix.
- the means is formed of a number of bits that is less than the number of bits required to represent in binary a number obtained by dividing one period of the reference signal by one period of the signal counted by the counter means. It is characterized by.
- the number of bits of the horizontal direction counter means is reduced, so that the circuit size can be reduced. For this reason, the power consumption can be reduced and the circuit area power can be reduced. Furthermore, the amount of wiring from the horizontal counter means to the signal generation circuit can be reduced, and the circuit area (frame area) can be reduced.
- the horizontal direction counter means is necessary for expressing a number obtained by dividing one horizontal scanning period by the period of the clock signal in a binary number. It is preferable to use a bit counter that is smaller than the number of bits! /.
- the number of bits of the horizontal direction counter means is reduced, so that the circuit size can be reduced. For this reason, the power consumption can be reduced and the circuit area power can be reduced. Furthermore, the amount of wiring from the horizontal counter means to the signal generation circuit can be reduced, and the circuit area (frame area) can be reduced.
- the vertical direction counter means is less than the number of bits required to express a number obtained by dividing one vertical scanning period by a horizontal scanning period in binary number, It is preferable to use a bit number counter! /.
- the number of bits of the horizontal direction counter means is reduced, so that the circuit size can be reduced. For this reason, the power consumption can be reduced and the circuit area power can be reduced. Furthermore, the amount of wiring from the horizontal counter means to the signal generation circuit can be reduced, and the circuit area (frame area) can be reduced.
- the vertical direction counter means has a number smaller than the number of bits necessary to express a number obtained by dividing one vertical scanning period by one period of the clock signal in binary number. Use a bit number counter! / It is preferable to be something! /.
- the number of bits of the horizontal direction counter means is reduced, so that the circuit size can be reduced. For this reason, the power consumption can be reduced and the circuit area power can be reduced. Furthermore, the amount of wiring from the horizontal counter means to the signal generation circuit can be reduced, and the circuit area (frame area) can be reduced.
- the electronic elements arranged in a matrix are display pixels arranged in a matrix, and the timing signal generation device is an arbitrary one.
- the horizontal blanking period of the video signal starts, and then the horizontal effective display period starts.
- the horizontal effective display period continues until the next horizontal reference signal is input.
- the horizontal counter stopping means stops the counting of the horizontal counter means between the time when the horizontal blanking period ends and the time when the counter in the horizontal counter means is swung out. preferable.
- the electronic elements arranged in a matrix are display pixels arranged in a matrix, and the timing signal generation device is an arbitrary
- the vertical blanking period of the video signal starts, then the vertical effective display period starts, and the vertical effective display period continues until the next vertical reference signal is input.
- the vertical counter stopping means stops the counting of the vertical counter means at a predetermined time from the end of the vertical blanking period until the counter in the vertical direction counter is swung out. I like it! /
- the counting can be stopped simply and accurately.
- an electronic device is characterized by including the timing signal generating device described above.
- the counting of the counter means can be operated only for a predetermined period and then stopped. For this reason, since the operation stop period of the counter means is generated, the power consumption of the electronic device can be reduced.
- a display device is characterized by including the timing signal generating device described in the above-described deviation.
- the counting of the counter means can be operated only for a predetermined period and then stopped. For this reason, since the operation stop period of the counter means occurs, the power consumption of the display device can be reduced.
- the timing signal generating device is monolithically formed on a substrate on which an image display element is formed.
- an image receiving device includes any one of the timing signal generating devices described above, and the timing signal generating device is formed monolithically on a substrate on which the image receiving elements are formed. It has been characterized by
- the counting of the counter means can be operated only for a predetermined period and then stopped. For this reason, since the operation stop period of the counter means occurs, the power consumption of the image receiving device can be reduced.
- an electronic device driving method is provided in order to solve the above problems.
- An electronic device driving method wherein the timing signal generation device includes a counter unit that performs a counting operation based on the reference signal, and a signal generation circuit that generates the timing signal according to a count output of the counter unit.
- the method includes a step of stopping or terminating the counting of the force counter means during a period from when an arbitrary reference signal is input until a force-order reference signal is input.
- the power consumption of the counting means provided in the electronic device can be reduced.
- End count means that when the counter has run out, a signal indicating that the counter has run out is issued so that the signal generation circuit does not refer to the counter.
- the electronic device driving method includes an electronic element arranged in a matrix, a driving circuit for driving the electronic device, and a horizontal reference.
- a timing signal generating device that generates a timing signal using a signal and a clock signal and outputs the timing signal to the driving circuit, wherein the timing signal generating device outputs the horizontal reference signal
- a horizontal counter that counts the number of clocks of the clock signal as a reference; and a signal generation circuit that generates the plurality of timing signals according to a power output of the horizontal counter.
- the counting operation of the horizontal counter means is stopped or terminated. It is characterized by including a step to be performed.
- the power consumption of the counting means provided in the electronic device can be reduced.
- End count means that when the counter has run out, a signal indicating that the counter has run out is issued so that the signal generation circuit does not refer to the counter.
- the electronic device driving method includes an electronic element arranged in a matrix, a driving circuit for driving the electronic element, and a timing signal using a vertical reference signal and a horizontal reference signal.
- Timing signal generating device for generating and outputting to the drive circuit
- the timing signal generator includes a vertical direction counter means for counting the number of pulses of the horizontal reference signal with reference to the vertical reference signal, and the vertical direction counter means.
- a signal generation circuit for generating the plurality of timing signals according to the count output of the vertical direction counter means during a period in which an arbitrary vertical reference signal is input and the next vertical reference signal is input. It includes the step of stopping or terminating the counting operation.
- the power consumption of the counting means provided in the electronic device can be reduced.
- the electronic device driving method includes an electronic element arranged in a matrix, a vertical driving circuit and a horizontal driving circuit for driving the electronic element, the vertical driving circuit, and a horizontal driving circuit.
- a timing signal generation device that generates and outputs a plurality of timing signals according to a horizontal reference signal and a vertical reference signal to a drive circuit, wherein the timing signal generation device comprises: Horizontal counter means for counting the number of clocks in accordance with the horizontal reference signal, and vertical counter means for counting the number of clocks in accordance with the vertical reference signal, the horizontal counter means being provided with the horizontal reference signal. To start counting the number of power clocks, then stop or end the count, and count until the next reference signal is input. And the vertical counter means starts counting the number of clocks after inputting the vertical reference signal, and then stops or ends the count, and the next reference signal And a step of controlling the count so as to continue or stop until it is input.
- the power consumption of the counting means provided in the electronic device can be reduced.
- the electronic device driving method includes a plurality of timings using an electronic element arranged in a matrix, a driving circuit for driving the electronic element, a vertical reference signal, and a clock signal.
- a timing signal generating device that generates a signal and outputs the signal to the driving circuit, wherein the timing signal generating device uses the number of clocks of the clock signal based on the vertical reference signal.
- Counting cow And a signal generation circuit for generating the plurality of timing signals in accordance with the count output of the counter means. During a period from when an arbitrary reference signal is input to when a power-order reference signal is input And a step of stopping or terminating the counting operation of the counter means.
- the power consumption of the counting means provided in the electronic device can be reduced.
- the electronic device driving method includes an electronic element arranged in an array, a driving circuit for driving the electronic element, and a timing signal generated using a reference signal.
- An electronic device driving method comprising: a timing signal generating device that outputs to a driving circuit, wherein the timing signal generating device performs a counting operation based on the reference signal; and the counter device
- a signal generation circuit for generating the timing signal according to the count output of the counter, and the counter means is a binary number obtained by dividing one period of the reference signal by one period of the signal counted by the counter means.
- the number of bits is smaller than the number of bits necessary for the expression, and when the counter of the counter means runs out, it counts against the signal generation circuit.
- the control signal so that the output of the motor means, Ru.
- the power consumption of the counting means provided in the electronic device can be reduced.
- FIG. 1 is a circuit block diagram schematically showing a configuration of a timing signal generation device (TG) according to an embodiment of the present invention.
- FIG. 2 (a) is a diagram showing a horizontal timing chart in the timing signal generation device according to the embodiment.
- FIG. 2 (b) is a diagram showing a timing chart in the vertical direction in the timing signal generation device according to the embodiment.
- FIG. 3 is a diagram schematically illustrating an example of a schematic configuration of an active matrix liquid crystal display device according to an embodiment of the present invention.
- FIG. 4 schematically shows an example of a schematic configuration of a conventional active matrix liquid crystal display device. It is a figure.
- FIG. 5 is a circuit block diagram schematically showing a configuration of a conventional timing signal generation device.
- FIG. 6 (a) is a diagram showing a horizontal timing chart in the conventional timing signal generating device.
- FIG. 6 (b) is a diagram showing a vertical timing chart in the conventional timing signal generating device.
- FIG. 3 is a diagram schematically showing an example of a schematic configuration of the active matrix liquid crystal display device according to the present embodiment.
- a liquid crystal display device (liquid crystal module) 100 includes a timing signal generation device (timing generator; hereinafter referred to as “TG”) 10, a power supply circuit 11, a liquid crystal display control circuit (hereinafter referred to as “LCDC”) 12, A video circuit 13, a driver circuit 14, and a pixel array 15 are provided.
- timing generator timing generator
- LCDC liquid crystal display control circuit
- the pixel array 15 is a liquid crystal display panel in which pixel electrodes for display and TFT transistors for applying a voltage to the pixel electrodes are arranged in a matrix on a substrate, and functions as an image display element. It is.
- the driver circuit 14 includes a source driver (horizontal drive circuit) 14a and a gate driver (vertical drive circuit) 14b.
- the source driver 14a is arranged on the upper side of the pixel array 15, and the gate driver 14b is arranged on the left side of the pixel array 15, and is displayed data latched in units of one line in the horizontal direction in the source driver 14a. Is applied to the pixel electrode of the pixel array 15 in the horizontal direction in units of one line in the horizontal direction from the top to the bottom, thereby applying a voltage for each pixel between the pixel electrode and the common electrode. Depending on the value, the liquid crystal transmission between the electrodes may be controlled and displayed.
- the power circuit 11 is a circuit for supplying power to the video circuit 13, the driver circuit 14, and the pixel array 15.
- LCDC12 uses TG10 as a reference signal (horizontal reference signal (hereinafter “H signal”) and vertical reference signal (hereinafter “V signal”)) and clock signal (
- CLK signal (Hereinafter “CLK signal”) and digital video signal to the video circuit 13 Output.
- the TG 10 generates various timing signals according to the reference signal and supplies them to the video circuit 13 or the driver circuit 14.
- the source driver 14a shift start signal hereinafter “SSP signal”
- the source driver 14a running direction switching signal hereinafter “LR signal”
- the gate driver 14b bus line selection signal shift are included in this timing signal.
- GSP signal gate driver bus line selection signal width control signal
- PCTL signal precharge control signal
- FRP signal polarity selection signal
- GSP signal A bus line selection start signal of the gate driver 14b
- UD signal scanning direction switching signal
- the video circuit 13 supplies an analog video signal for driving a liquid crystal to the driver circuit 14.
- the driver circuit 14 drives the pixel array 15 based on various signals from the TG 10 and the video circuit 13. That is, the gate driver 14b operates according to the GSP and sequentially selects each row of the liquid crystal pixels, and the source driver 14a operates according to the SSP and sequentially selects the video signal by distributing it to each column of the liquid crystal pixels. The image is displayed on the pixel array 15 by writing to the liquid crystal pixels in the next row.
- the TG10 receives at least a horizontal reference signal, a vertical reference signal, and a clock signal, and generates and outputs a timing signal to a horizontal drive circuit and a vertical drive circuit for driving display pixels arranged in a matrix. It functions as a timing signal generation device.
- a display pixel the power described by taking a liquid crystal display element as an example, the present invention is not limited to this, and can be widely applied to any matrix type display pixel.
- the horizontal reference signal and the vertical reference signal may be configured to be supplied from an external computer, for example.
- FIG. 1 is a circuit block diagram schematically showing the configuration of TG10.
- the TG 10 includes a counter initialization circuit 1, a horizontal counter 2, a vertical counter 3, a signal generation circuit group 4, a horizontal counter stop circuit 5, and a vertical counter stop circuit 6.
- Counter initialization circuit 1 inputs H signal, V signal, and CLK signal,
- Control signals are output to direction counter 2, vertical direction counter 3, horizontal counter stop circuit 5, and vertical counter stop circuit 6, respectively.
- the horizontal counter 2 receives the CLK signal, counts the number of clocks, and supplies it to a horizontal decoder (not shown) and a horizontal counter stop circuit 5 of the signal generation circuit group 4.
- the horizontal direction counter 2 is configured to reset the count of the number of clocks when the control signal is supplied from the counter initialization circuit 1. That is, the control signal supplied from the counter initialization circuit 1 to the horizontal direction counter 2 is synchronized with the H signal, and the count reset is performed.
- the horizontal counter 2 has an H signal and therefore a clock.
- the vertical direction counter 3 receives the CLK signal, counts the number of clocks, and supplies it to a vertical decoder (not shown) and a vertical counter stop circuit 6 of the signal generation circuit group 4.
- the vertical direction counter 3 is configured to reset the count of the number of clocks when a control signal is supplied from the counter initialization circuit 1. That is, the control signal supplied from the counter initialization circuit 1 to the vertical direction counter 3 is synchronized with the V signal, and the count reset is performed.
- the vertical counter 3 is clocked according to the V signal.
- the horizontal counter stop circuit 5 is configured so that the horizontal counter 2 receives the H signal and
- the horizontal counter stop circuit 5 stops the counting of the horizontal counter 2 at a predetermined timing for stopping the counting of the horizontal counter 2 based on the force count output from the horizontal counter 2. It is configured as follows. The predetermined time (predetermined timing) at which the horizontal force counter stop circuit 5 stops the counting of the horizontal direction counter 2 will be described later.
- the vertical counter stop circuit 6 is operated by the vertical counter 3 receiving the V signal.
- the vertical counter stop circuit 6 stops the count of the vertical counter 3 at a predetermined timing based on the count output from the vertical counter 3 when the count of the vertical counter 3 stops. It is configured.
- the predetermined time (predetermined timing) when the vertical counter stop circuit 6 stops the counting of the vertical counter 3 will be described later.
- the horizontal counter stop circuit 5 and the vertical counter stop circuit 6 are forces provided outside the horizontal direction counter 2 and the vertical direction counter 3.
- the horizontal counter stop circuit 5 and the vertical counter stop circuit 6 are not limited to this configuration.
- the direction counter 2 and the vertical direction counter 3 can be provided integrally in the horizontal counter stop circuit 5 and the vertical counter stop circuit 6, respectively.
- the signal generation circuit group 4 is a signal generation circuit group that generates a plurality of timing signals in accordance with the count outputs of the horizontal direction counter 2 and the vertical direction counter 3, and performs various controls for driving the liquid crystal display device 100.
- a plurality of signal generation circuits for generating signals are provided.
- the SSP circuit 4a that generates the SSP signal
- the GSP circuit 4b that generates the GSP signal
- the GCK circuit 4c that generates the GCK signal
- the FRP signal used as the base signal for the polarity inversion of the COM signal, video signal, etc.
- FRP circuit 4d that generates
- LR circuit 4e that generates LR signal
- PWC circuit 4f that generates PWC signal
- PCTL circuit 4g that generates PCTL signal
- UD circuit 4h that generates UD signal.
- the types of signal generation circuits included in the signal generation circuit group 4 are not limited to those described above, and signal generation circuits that can be used in a conventionally known matrix display device can be suitably combined.
- FIGS. 2 (a) and 2 (b) are diagrams showing timing charts in the above-described TG10, FIG. 2 (a) is a timing chart in the horizontal direction, and FIG. 2 (b) is a vertical direction.
- FIG. 6 is a diagram showing a timing chart of
- FIG. 2 (a) shows the H signal, SSP signal, LR signal, GCK signal, PWC signal, PCTL signal, FRP signal,
- the operating period of the horizontal counter 2 is shown. As shown in the figure, the LR signal, the GCK signal, the PWC signal, the PCTL signal, and the FRP signal have the H signal “Low”.
- SSP signal is H signal.
- This period is one horizontal scanning period T1 of the video signal.
- One horizontal scanning period T1 of the video signal in this embodiment that is, after the H signal becomes “Low”, the next H signal
- a horizontal effective display period T2 horizontal effective display area
- a video signal including video information is output and a horizontal blanking period ⁇ 3 in the period until “Low”.
- the LR signal, GCK signal, PWC signal, PCTL signal, and FRP signal are configured to generate a change point within the horizontal blanking period ⁇ 3, and after the change point occurs in the SSP signal, Since the horizontal effective display period ⁇ 2 begins, the period indicated by the arrow above the SSP signal waveform in the figure is the horizontal effective display period ⁇ 2.
- the horizontal counter 2 needs to count the number of clocks up to the position required by the signal output from the signal generation circuit group 4 (mainly the position where the change point is generated). In the case of this embodiment, the horizontal direction counter 2 changes the SSP signal after the ⁇ signal becomes “Low”.
- the horizontal counter 2 needs to count at least the horizontal blanking period T3.
- the horizontal counter stop circuit 5 causes a new H after a change point has occurred in all timing signals generated by the signal generation circuit group 4 within one horizontal scanning period T1 of the video signal. Until a signal is input
- Power consumption can be reduced by controlling the horizontal counter 2 to stop counting during this period.
- the horizontal blanking period T3 of the video signal starts, and then the horizontal effective display period T2 starts.
- the horizontal effective display period T2 is changed until the next H signal is input.
- the horizontal counter stop circuit 5 counts for at least the horizontal blanking period T3 of the horizontal counter 2, and then the next H signal is input.
- Control may be performed so that the count is stopped at a predetermined time until the start. That is, the horizontal count
- the function of the data stop circuit 5 when used, an arbitrary horizontal reference signal is input, and there is a change point in all timing signals generated by the signal generation circuit within one horizontal scanning period T1 of the video signal.
- the control may be performed so as to have a period during which the counting of the horizontal direction counter means is stopped from when it occurs to when a new horizontal reference signal is input.
- the horizontal counter 2 needs to count at least the period, it goes without saying that it may count more than that period.
- the horizontal blanking period T3 should be counted as short as possible. It is preferred that In other words, it is preferable that the horizontal counter stop circuit 5 controls the horizontal force counter 2 to count only during the horizontal blanking period T3 and then stop counting.
- the signal generation circuit group 4 includes all timing signals generated in one horizontal scanning period T1 of the video signal within the period in which the horizontal counter 2 is counting, It is possible to generate a change point.
- the signal generation circuit group 4 it can be considered based on the SSP signal in which a signal change point is generated near the switching timing between the horizontal blanking period T3 and the horizontal effective display period T2.
- the signal generation circuit group 4 includes at least an SSP circuit 4a that generates an SSP signal.
- the SSP signal is input within one horizontal scanning period T1 of the video signal after an arbitrary horizontal reference signal is input.
- the transition point is generated at the latest timing among all the timing signals generated by the signal generation circuit group, and the horizontal counter stop circuit 5 receives an arbitrary H signal,
- the present invention is not limited to this. 1 During the horizontal scanning period T1, the H signal becomes “Low” and becomes “High” again.
- FIG. 2 (b) shows the V signal, H signal, SSP signal, GCK signal, PWC signal, GSP signal, and PCT.
- the L signal, UD signal, vertical effective display period T5 (vertical effective display area), vertical blanking period ⁇ 6, and the operation period of the vertical counter 3 are shown.
- the SSP signal and the PCTL signal are configured such that a change point is generated within the vertical effective display period ⁇ 5.
- the GCK signal and PWC signal also have a slight change point in the force vertical blanking period ⁇ 6, which is mainly the change point in the vertical effective display period ⁇ 5.
- the V signal is "Low".
- a vertical blanking period T6 starts, and a change point is generated immediately before switching between the vertical blanking period T6 and the vertical effective display period T5.
- the vertical blanking period T6 starts after the V signal becomes “Low”.
- the change point is configured to occur immediately before switching between the king period T6 and the vertical effective display period T5, but the change point is configured to occur earlier than the change point generation timing in the GSP signal.
- the vertical blanking period T6 it is common to stop various signals such as the SSP signal in order to reduce power consumption.
- the TG 10 in this embodiment receives the video signal after an arbitrary V signal is input.
- the vertical blanking period T6 starts, and then the vertical effective display period T5 starts.
- the vertical effective display period T5 is set to continue until the next V signal is input.
- the vertical counter stop circuit 6 performs counting until the vertical counter 3 is at least during the vertical blanking period ⁇ 6, and then the next V signal is input.
- the vertical counter stop circuit 6 controls the vertical counter 3 so that it counts only during the vertical blanking period T6 and then stops counting. This is because power consumption can be further reduced in this case.
- the signal generation circuit group 4 a GSP signal in which a signal change point is generated near the switching timing between the vertical blanking period T6 and the vertical effective display period T5 can also be considered as a reference.
- the signal generation circuit group 4 includes at least a circuit 4b that generates a shift start signal (GSP) of the gate drive circuit, and the vertical counter stop circuit 6 receives an arbitrary V signal and receives the signal generation circuit. Change in GSP signal generated in group 4
- the present invention is not limited to this.
- the Y signal becomes “Low” and becomes “High” again.
- the TG 10 according to the present embodiment and the liquid crystal display device 10 including the TG 10 0 includes counter stop means (horizontal counter stop circuit 5 and vertical counter stop circuit 6) for stopping the horizontal direction counter 2 and the vertical direction counter 3 after operating them for a predetermined period. For this reason, the operation period of the horizontal counter 2 and the vertical counter 3 can be shortened, and the power consumption can be reduced accordingly.
- the number of counts in the horizontal direction counter 2 and the vertical direction counter 3 can be reduced, the amount of wiring from the horizontal direction counter 2 and the vertical direction counter 3 to TG10 is reduced (for example, on the panel layout). be able to. Therefore, the circuit area can be reduced (the frame is reduced).
- wiring can be provided from the horizontal counter stop circuit 5 and the vertical counter stop circuit 6 to the signal generation circuit group 4.
- the signal change point position detection circuit in the signal generation circuit group 4 can be reduced. This also leads to a reduction in circuit area.
- the load on the line that transmits the CLK signal can be reduced by reducing the number of bits, resulting in lower power consumption and reduced circuit area.
- the ZCLK line buffer can be reduced in size).
- the horizontal direction counter and the vertical direction counter may be a synchronous counter or an asynchronous counter.
- a neutral counter is used.
- the present invention is not limited to this, and a binary counter is more preferable than a BCD counter that can obtain the same result.
- the TG 10 including both the horizontal counter stop circuit 5 and the vertical counter stop circuit 6 has been described.
- the horizontal counter stop is described.
- the TG 10 and the display device including either one of the horizontal counter stop circuit 5 and the vertical counter stop circuit 6 as long as at least one of the circuit 5 and the vertical counter stop circuit 6 is provided are also included in the present invention.
- the present invention is not limited to the above-described embodiment, and can be appropriately generalized based on the technical level at the time of the present application.
- a matrix type liquid crystal display device The timing signal generation device according to the present invention that can be applied only to a device is also applied to a configuration in which a reference signal is input at least and a timing signal is output to a drive circuit for driving electronic elements arranged in an array. Is possible.
- the timing signal generation device includes a counter unit that performs a counting operation based on the reference signal, a signal generation circuit that generates the timing signal according to a count output of the counter unit, and an arbitrary After the reference signal is input, it is configured to include count stop means that can stop the counting operation of the counter means before the next reference signal is input.
- array form is used as a concept including both those arranged in one column and those arranged in a matrix.
- the present invention also includes a timing signal generation device that receives at least a clock signal and a horizontal reference signal and outputs a timing signal to a horizontal drive circuit for driving electronic elements arranged in a matrix.
- the timing signal generation device includes a horizontal direction counter unit that performs a clock signal counting operation based on the horizontal reference signal, and a signal that generates the timing signal according to the count output of the horizontal direction counter unit.
- a generation circuit and horizontal counter stopping means capable of stopping the counting operation of the horizontal direction counter means during a period in which the next horizontal reference signal is input after an arbitrary horizontal reference signal is input; Become.
- a timing signal generation device that receives at least a horizontal reference signal and a vertical reference signal and outputs a timing signal to a vertical drive circuit for driving electronic elements arranged in a matrix is also included in the present invention.
- the timing signal generation device according to the present invention is based on the vertical counter means for counting the number of pulses of the horizontal reference signal based on the vertical reference signal, and the count output of the vertical counter means.
- the signal generating circuit for generating the timing signal and the vertical counter means that can stop the counting operation of the vertical counter means during the period when the vertical reference signal is input and the next vertical reference signal is input. And a counter stop means.
- the present invention includes a timing signal generation apparatus configured by combining the above-described techniques. Specifically, at least a horizontal reference signal, a vertical reference signal, and a clock signal are input. And a timing signal generating device that generates and outputs timing signals to a horizontal driving circuit and a vertical driving circuit for driving electronic elements arranged in a matrix.
- the timing signal generating apparatus includes a horizontal counter unit that counts the number of clock signals based on the horizontal reference signal, and a vertical counter that counts the number of pulses of the horizontal reference signal based on the vertical reference signal.
- the direction counter means In accordance with the direction counter means, the count output of the horizontal direction counter means and the vertical direction counter means, a signal generation circuit for generating a timing signal, and an arbitrary horizontal reference signal is inputted, and then the next horizontal reference signal is inputted.
- the horizontal counter stopping means that can stop the counting operation of the horizontal direction counter means during the period of time, and the vertical direction counter means during the period when the arbitrary vertical reference signal is input and the next vertical reference signal is input.
- a vertical counter stopping means capable of stopping the counting operation.
- a timing signal generation device that receives a clock signal and a vertical reference signal and outputs a timing signal to a drive circuit for driving electronic elements arranged in a matrix may be used.
- the timing signal generation device includes a vertical counter unit that counts the number of clocks of the clock signal with reference to the vertical reference signal, and a signal that generates the timing signal according to the count output of the vertical counter unit.
- a vertical counter stopping means capable of stopping the counting operation of the vertical counter means during a period from when an arbitrary reference signal is input until a power-order reference signal is input. .
- the timing signal generation device starts a counting operation of the horizontal direction counter means, generates a change point of the timing signal, and then generates a change point of the timing signal by the horizontal counter stop means. It may be controlled so that the counting operation of the horizontal direction counter means is stopped and the counting operation is stopped until the next horizontal reference signal is input.
- the timing signal generation device starts the count operation of the vertical direction counter means, generates a change point of the timing signal, and then generates the change point of the timing signal by the vertical counter stop means. Even if the count operation of the vertical counter means is stopped and the count operation is controlled to continue until the next vertical reference signal is input. Good.
- the horizontal counter 2 and the vertical counter 3 are stopped at a predetermined time to reduce power consumption.
- the horizontal counter 2 and the vertical counter 3 do not count during the period to be stopped, so that the counter with a smaller number of bits can be used for the period to be stopped.
- the horizontal counter 2 'and the vertical counter 3' are stopped at a predetermined time to reduce power consumption. Further, in the horizontal direction for the period of stoppage.
- An embodiment in which the number of bits of the counter 2 'and the vertical counter 3' is reduced will be described.
- the configuration other than the horizontal counter 2 ′ and the vertical counter 3 ′ is the same as that of the first embodiment. In the following, for ease of understanding, a case where a VGA image is displayed will be described as an example.
- the image area including the blanking period is 25.175 MHz with a dot clock of 800 dots (horizontal direction) X 525 lines (vertical) Direction).
- a dot clock of 800 dots (horizontal direction) X 525 lines (vertical) Direction) To express 800 and 525 in binary, lObit is required.
- the effective display period (effective video area) is 640 dots (horizontal direction) X 480 lines (vertical direction).
- the horizontal direction counter 2 and the vertical direction counter 3 included in the TG 10 count up to positions (mainly changing points) required by each timing signal output from the signal generation circuit group 4. There is a need.
- the SSP signal is stopped in the vertical blanking period T96 in order to reduce power consumption.
- the position where the SSP signal is not output the position where no change point is generated
- the vertical counter in the conventional liquid crystal display device requires 9 bits or 1 Obit.
- Period T6 begins, and then the vertical effective display period T5 (effective display area)
- the vertical counter is used to determine the start position of the vertical blanking period T6, but in the present embodiment, on the contrary, it is used to determine the start position of the vertical effective display period T5. Become. In this case, the vertical counter 3 ' It is sufficient to use at least a 6-bit counter that counts 45 during period T6.
- the horizontal counter 2 has less bits than the number of bits required to represent one binary scan period T1 divided by one period of the clock signal in binary. However, the horizontal counter 2 uses at least a counter greater than the number of bits necessary to represent the horizontal blanking period T3 in binary. Is more preferable.
- the ranking period T3 starts, then the horizontal effective display period T2 starts, and the next H signal
- the horizontal counter stop circuit 5 causes the counter in the horizontal direction counter 2 to run out after the horizontal blanking period T3 has elapsed. It is preferable that the counter of the horizontal direction counter 2 is stopped at a predetermined time or until it is shaken.
- the simplest configuration of the horizontal counter stop circuit 5 can be configured to stop the counting of the horizontal counter 2 when the counter in the horizontal counter 2 is swung out.
- the signal generation circuit group is counted by the horizontal counter 2.
- the vertical counter 3 uses a counter for the number of bits which is smaller than the number of bits required to represent the number obtained by dividing one vertical scanning period T4 by the horizontal scanning period T1 in binary. However, the vertical counter 3 uses at least a counter greater than the number of bits necessary to express the number of vertical blanking periods T6 divided by the horizontal scanning period T1 in binary. Is more preferable.
- the ranking period T6 starts, then the vertical effective display period T5 starts, and the next V signal
- the vertical counter stop circuit 6 counts the vertical counter 3 at a predetermined time from when the vertical blanking period T6 elapses until the counter in the vertical counter 3 swings out or when the counter is swung out. It is preferable to stop the operation.
- the simplest configuration of the vertical counter stop circuit 6 can be configured to stop the count of the vertical counter 3 when the counter in the vertical counter 3 is shaken. In other cases, the power can be stopped several clocks after the horizontal blanking period T3 has elapsed. From the standpoint of low power consumption, it is more desirable to stop counting at the same time as the horizontal blanking period T3.
- the timing signal generation device reduces the counter counter for stopping the horizontal direction counter and the vertical direction counter at a predetermined time, and the number of bits of the counter.
- a horizontal direction counter and a vertical direction counter are provided.
- the number of bits of the horizontal direction counter and the vertical direction counter is reduced, so that the circuit scale is reduced. For this reason, power consumption is reduced and the circuit area is reduced (the frame is reduced).
- the present invention is more effective in larger image formats (for example, SVGA, XGA, etc.) than just VGA display.
- the effect is remarkable when the horizontal / vertical blanking period with a large number of pixels is short.
- the force described by taking the case where both the horizontal direction counter and the vertical direction counter are counters having a small number of bits as an example is not limited to this configuration.
- an embodiment in which it is sufficient if the number of bits of at least one of the horizontal counter and the vertical counter is small is included in the present invention.
- a matrix type display device including the above-described timing signal generation device according to the present invention may also be included in the present invention.
- the matrix display device include DMD, EL, FED, LED, PDP, and fluorescent display tube in addition to the above-described active matrix liquid crystal display device.
- the timing signal generation device may be an IC chip, or may be monolithically formed on a substrate on which an image display element is formed.
- an active matrix liquid crystal display device in which the timing signal generation device is monolithically formed on a substrate on which an image display element is formed is preferable.
- the present invention is not limited to the above-described embodiment, and can be appropriately generalized based on the technical level at the time of the present application.
- a method of driving a matrix display device including a timing signal generation device is also included in the present invention.
- an electronic device arranged in an array, a driving circuit for driving the electronic device, and a timing signal generating device that generates a timing signal using a reference signal and outputs the timing signal to the driving circuit are provided.
- a method including a step of stopping or terminating the counting of the counter means during a period from when an arbitrary reference signal is input until a power-order reference signal is input.
- end counting means that when the counter has run out, a pulse indicating that the counter has run out is issued so that the signal generation circuit does not refer to the counter.
- an electronic element arranged in a matrix a drive circuit for driving the electronic device, a horizontal reference signal, and a clock signal are used to generate a timing signal and output it to the drive circuit
- a timing signal generator wherein the timing signal generator counts the number of clocks of the clock signal on the basis of the horizontal reference signal, and the horizontal direction Counter hand
- a signal generating circuit for generating the plurality of timing signals according to the count output of the stage, and a horizontal direction counter means during a period in which an arbitrary horizontal reference signal is input and a power-order horizontal reference signal is input
- a method including the step of stopping or terminating the counting operation is also included in the present invention.
- an electronic element arranged in a matrix a driving circuit for driving the electronic element, a timing signal is generated using a vertical reference signal and a horizontal reference signal, and the driving circuit is generated.
- a timing signal generating device for outputting the electronic device, wherein the timing signal generating device counts the number of pulses of the horizontal reference signal on the basis of the vertical reference signal; and
- a signal generation circuit for generating the plurality of timing signals according to the count output of the vertical direction counter means, and the vertical direction counter means in a period during which the next vertical reference signal is input after an arbitrary vertical reference signal is input.
- the method may include a step of stopping or terminating the counting operation of the direction counter means.
- the present invention includes an electronic device arranged in a matrix, a vertical drive circuit and a horizontal drive circuit for driving the electronic device, and a horizontal reference for the vertical drive circuit and the horizontal drive circuit. And a timing signal generator that generates and outputs a plurality of timing signals according to the signal and the vertical reference signal, wherein the timing signal generator counts the number of clocks according to the horizontal reference signal.
- the vertical counter means starts counting the number of power clocks by inputting a vertical reference signal, then stops or ends the count, and stops counting until the next reference signal is input. Or a step of controlling to continue to finish.
- a plurality of timing signals are generated by using an electronic element arranged in a matrix, a driving circuit for driving the electronic element, a vertical reference signal, and a clock signal to generate the driving signal.
- a timing signal generation device that outputs to a dynamic circuit, wherein the timing signal generation device counts the number of clocks of the clock signal based on the vertical reference signal
- a signal generation circuit for generating the plurality of timing signals according to the count output of the counter means, and a period from when an arbitrary reference signal is input to when a power-order reference signal is input
- the method may include a step of stopping or terminating the counting operation of the counter means.
- an electronic element arranged in an array, a driving circuit for driving the electronic element, and a timing signal generating device that generates a timing signal using a reference signal and outputs the timing signal to the driving circuit
- the timing signal generation device generates the timing signal in accordance with a counter unit that performs a counting operation using the reference signal as a reference, and a count output of the counter unit.
- a signal generating circuit, wherein the counter means is less than the number of bits required to represent in binary a number obtained by dividing one period of the reference signal by one period of the signal counted by the counter means When the counter of the counter means has run out, the signal generator counts the number of signals counted by the counter means.
- the present invention is applicable to other electronic devices in which electronic elements are arranged in an array. is there. That is, the present invention can be applied to fluorescent display tubes in which display elements are arranged in a line or matrix, scanners in which light receiving elements are arranged in a line or matrix, image processing ICs, fingerprint authentication devices, and the like.
- the present invention can also be suitably applied to an imaging apparatus that uses the display element as an image receiving element by applying the configuration of the display element of the display device.
- the timing signal generating device is an imaging device formed monolithically with the light receiving element.
- the timing signal generating means can operate the counts of the horizontal direction counter means and the Z or vertical direction counter means for a predetermined period, and then stop them. For this reason, the operation stop period of the horizontal direction counter means and the Z or vertical direction counter means occurs, so that the power consumption can be reduced. Play.
- the electronic device or matrix type display device using the timing signal generating means according to the present invention it is possible to provide an electronic device, matrix type display device or image receiving device in which the power consumption of the counter means is reduced. Can do.
- the display elements are arranged in a single row or a matrix.
- the display elements are arranged in a single row or a matrix.
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Abstract
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JP2006537786A JP4668202B2 (ja) | 2004-09-30 | 2005-09-28 | タイミング信号生成回路、電子デバイス、表示装置、受像装置、及び電子デバイスの駆動方法 |
US11/664,084 US20090201274A1 (en) | 2004-09-30 | 2005-09-28 | Timing Signal Generating Circuit, Electronic Apparatus, Display Apparatus, Image-Reception Apparatus, and Driving Method |
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PCT/JP2005/017895 WO2006035843A1 (ja) | 2004-09-30 | 2005-09-28 | タイミング信号生成回路、電子デバイス、表示装置、受像装置、及び駆動方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090201274A1 (ja) |
JP (1) | JP4668202B2 (ja) |
CN (1) | CN100555396C (ja) |
WO (1) | WO2006035843A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006251795A (ja) * | 2005-03-08 | 2006-09-21 | Au Optronics Corp | タイミング信号の出力方法及びタイミングコントローラ |
WO2011046044A1 (ja) * | 2009-10-13 | 2011-04-21 | 学校法人 東洋大学 | 信号線駆動回路 |
Families Citing this family (13)
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KR20100077325A (ko) * | 2008-12-29 | 2010-07-08 | 삼성전자주식회사 | 바이어스 제어 회로, 소스 드라이버 및 액정 디스플레이 장치 |
CN101789222B (zh) * | 2009-01-22 | 2012-05-23 | 联咏科技股份有限公司 | 用数据使能信号控制显示器时序的方法及时序控制电路 |
KR20110124039A (ko) * | 2010-05-10 | 2011-11-16 | 삼성전자주식회사 | 표시 패널을 구동하기 위한 데이터 드라이버 및 이를 구비하는 디스플레이 장치 |
WO2011145360A1 (ja) * | 2010-05-21 | 2011-11-24 | シャープ株式会社 | 表示装置およびその駆動方法、ならびに表示システム |
KR101688599B1 (ko) | 2010-06-01 | 2016-12-23 | 삼성전자 주식회사 | 모드전환방법, 상기 모드전환방법이 적용되는 디스플레이구동ic 및 영상신호처리시스템 |
TWI509451B (zh) * | 2013-11-15 | 2015-11-21 | Inst Information Industry | 用電建議裝置、方法及其電腦程式產品 |
CN112750401B (zh) * | 2018-11-12 | 2022-05-24 | 成都晶砂科技有限公司 | 显示驱动装置及方法 |
US11694601B2 (en) | 2019-03-29 | 2023-07-04 | Creeled, Inc. | Active control of light emitting diodes and light emitting diode displays |
US11776460B2 (en) | 2019-03-29 | 2023-10-03 | Creeled, Inc. | Active control of light emitting diodes and light emitting diode displays |
US20210043821A1 (en) * | 2019-03-29 | 2021-02-11 | Cree, Inc. | Active control of light emitting diodes and light emitting diode displays |
US11727857B2 (en) | 2019-03-29 | 2023-08-15 | Creeled, Inc. | Active control of light emitting diodes and light emitting diode displays |
US11790831B2 (en) | 2019-03-29 | 2023-10-17 | Creeled, Inc. | Active control of light emitting diodes and light emitting diode displays |
US11695102B2 (en) | 2020-06-19 | 2023-07-04 | Creeled, Inc. | Active electrical elements with light-emitting diodes |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02113679A (ja) * | 1988-10-21 | 1990-04-25 | Nec Corp | 固体撮像装置用同期信号発生回路 |
JP2002091404A (ja) * | 2000-07-04 | 2002-03-27 | Hannstar Display Corp | Lcmタイミングコントローラーの信号処理方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5321517A (en) * | 1976-08-12 | 1978-02-28 | Nippon Television Ind Corp | Synchronizing signal selection circuit |
JPH0225169A (ja) * | 1988-07-13 | 1990-01-26 | Nec Corp | 固体撮像装置用同期信号発生回路 |
JPH05328294A (ja) * | 1992-05-25 | 1993-12-10 | Nec Corp | テレビジョン信号用メモリアドレス発生器 |
JP2531426B2 (ja) * | 1993-02-01 | 1996-09-04 | 日本電気株式会社 | マルチスキャン型液晶ディスプレイ装置 |
JPH0738799A (ja) * | 1993-07-20 | 1995-02-07 | Matsushita Electric Ind Co Ltd | 手振れ補正装置 |
JPH0876085A (ja) * | 1994-09-07 | 1996-03-22 | Hitachi Ltd | 液晶表示装置 |
JP3318821B2 (ja) * | 1996-01-19 | 2002-08-26 | ソニー株式会社 | 信号判別回路及び同期信号発生器 |
JPH1011033A (ja) * | 1996-06-20 | 1998-01-16 | Sony Corp | 液晶表示装置及びその駆動方法 |
WO2004086344A1 (ja) * | 2003-03-26 | 2004-10-07 | Semiconductor Energy Laboratory Co. Ltd. | 表示装置及びその駆動方法 |
JP3821111B2 (ja) * | 2003-05-12 | 2006-09-13 | セイコーエプソン株式会社 | データドライバ及び電気光学装置 |
-
2005
- 2005-09-28 JP JP2006537786A patent/JP4668202B2/ja not_active Expired - Fee Related
- 2005-09-28 WO PCT/JP2005/017895 patent/WO2006035843A1/ja active Application Filing
- 2005-09-28 US US11/664,084 patent/US20090201274A1/en not_active Abandoned
- 2005-09-28 CN CNB2005800329145A patent/CN100555396C/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02113679A (ja) * | 1988-10-21 | 1990-04-25 | Nec Corp | 固体撮像装置用同期信号発生回路 |
JP2002091404A (ja) * | 2000-07-04 | 2002-03-27 | Hannstar Display Corp | Lcmタイミングコントローラーの信号処理方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006251795A (ja) * | 2005-03-08 | 2006-09-21 | Au Optronics Corp | タイミング信号の出力方法及びタイミングコントローラ |
WO2011046044A1 (ja) * | 2009-10-13 | 2011-04-21 | 学校法人 東洋大学 | 信号線駆動回路 |
JPWO2011046044A1 (ja) * | 2009-10-13 | 2013-03-07 | 学校法人 東洋大学 | 信号線駆動回路 |
Also Published As
Publication number | Publication date |
---|---|
US20090201274A1 (en) | 2009-08-13 |
CN100555396C (zh) | 2009-10-28 |
JPWO2006035843A1 (ja) | 2008-05-15 |
CN101031953A (zh) | 2007-09-05 |
JP4668202B2 (ja) | 2011-04-13 |
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