JP5742255B2 - Multiplex driving method, driving device, electro-optical device, and electronic apparatus - Google Patents

Description

  The present invention relates to a multiplex driving method, a driving device, an electro-optical device, an electronic apparatus, and the like.

  In recent years, in a liquid crystal projector using a liquid crystal panel, there has been an increasing demand for 3D projection image along with higher definition of the projected image, and the necessity of driving a liquid crystal panel having a large number of pixels at a high speed is increasing. For this reason, in a driving device for driving a liquid crystal panel, a right-eye image and a left-eye image are scanned by multiplex driving in which one source output is divided into a plurality of source lines and each source line is driven while scanning the gate line of the liquid crystal panel. Display driving alternately with images is performed.

  However, in this multiplex drive, a striped pattern may appear due to the influence of leakage, other capacitive coupling, etc., depending on the drive order of the source lines. Therefore, conventionally, a rotation function has been used that reduces the deterioration of image quality due to the above-described stripe pattern or the like by changing the driving order of the source lines in multiplex driving. In this rotation function, the driving order is changed so that the pixels connected to the respective source lines appear as uniform as possible. The driving order is defined by a rotation pattern in the driving device.

  Multiplex driving using such a rotation function is disclosed in, for example, Patent Documents 1 to 5. Patent Document 1 discloses a technique for changing the connection order between a source output of a driving device and a source line of a liquid crystal panel. Patent Document 2 discloses a technique for changing the driving order of multiplex driving using a rotation pattern. Patent Document 3 discloses a technique for correcting luminance unevenness caused by an offset that varies depending on a pixel driving order, which occurs in a source voltage written to a pixel of a source line in multiplex driving. Patent Document 4 discloses a technique for correcting luminance unevenness caused by an offset that varies depending on a pixel position, which occurs in a source voltage written to a pixel of a source line in multiplex driving. Patent Document 5 discloses a technique for changing a rotation pattern corresponding to a vertical synchronization signal and a horizontal synchronization signal in multiplex driving.

JP 2010-210653 A JP 2010-181516 A JP 2010-181506 A JP 2010-181503 A JP 2009-122157 A

  However, the techniques disclosed in Patent Documents 1 to 5 do not consider 3D display. Therefore, for example, when performing so-called active shutter 3D display, if the rotation function is used in the same manner as in conventional 2D display, there is a problem that the rotation pattern is biased between the right eye and the left eye and does not look uniform. When performing 3D display, writing and displaying of two or more screens for each eye are continuously performed so that the right-eye image is not visible to the left eye and the left-eye image is not visible to the right eye. At this time, the techniques disclosed in Patent Documents 1 to 5 have a problem that the rotation pattern is fixed by the right eye and the left eye, and a phenomenon that the stripe pattern is not sufficiently diffused occurs.

  The present invention has been made in view of the above technical problems. According to some aspects of the present invention, it is possible to provide a multiplex driving method, a driving device, an electro-optical device, an electronic apparatus, and the like that can prevent deterioration in image quality when performing 3D display.

  (1) In the first aspect of the present invention, one source output is output to a plurality of source lines of a display panel based on right-eye image data and left-eye image data corresponding to successive right-eye images and left-eye images, respectively. In the multiplex driving method of driving each source line in a divided manner, the driving order in the first horizontal scanning period of each of the right-eye image and the left-eye image is 2 × n (n is a natural number) for each vertical scanning period. A drive order changing step for changing, and a right-eye drive step for driving the plurality of source lines based on the right-eye image data by multiplex driving corresponding to the drive order changed in the drive order changing step; The multiplex driving corresponding to the driving order changed in the driving order changing step, the plurality of the plurality of images based on the left-eye image data Each of the right-eye drive step and the left-eye drive step that drives the source line, and in each vertical scanning period, the drive order is changed to 1 in order from the drive order changed in the drive order change step. The plurality of source lines are driven by changing the driving order in the immediately preceding horizontal scanning period every horizontal scanning period.

  In this aspect, the driving order of the multiplex driving in the first horizontal scanning period of each of the right-eye image and the left-eye image is changed every 2 × n vertical scanning period. In each vertical scanning period of the right-eye image and the left-eye image, the plurality of source lines are driven by changing the driving order in the immediately preceding horizontal scanning period every one horizontal scanning period in order from the changed driving order. As a result, the rotation pattern of each of the right eye and the left eye is not fixed, and the striped pattern can be sufficiently diffused, and the deterioration of the image quality can be prevented when performing 3D display.

  (2) In the multiplex driving method according to the second aspect of the present invention, in the first aspect, the driving order of the first horizontal scanning period of the left-eye image is the same as the first horizontal scanning period of the right-eye image. Shifting based on the driving order.

  According to this aspect, the rotation pattern of each of the right eye and the left eye is not fixed, and the striped pattern can be sufficiently diffused, so that deterioration of image quality can be prevented when performing 3D display. become.

  (3) In the multiplex driving method according to the third aspect of the present invention, in the second aspect, the first horizontal scanning of the left-eye image is based on the driving order of the first horizontal scanning period of the right-eye image. An offset setting step for setting an offset corresponding to the number of shifts in the driving order of the period, and in the left eye driving step, in the first horizontal scanning period of the left eye image, the first horizontal scanning period in the right eye driving step The plurality of source lines are driven in a driving order shifted by the number of shifts corresponding to the offset with reference to the driving order.

  According to this aspect, the offset can be set according to the right-eye image and the left-eye image. As a result, the right eye and left eye rotation patterns are not fixed without depending on the type of image, and the stripe pattern can be sufficiently diffused to prevent deterioration of image quality when performing 3D display. Will be able to.

  (4) The multiplex drive method according to the fourth aspect of the present invention is the display panel according to any one of the first to third aspects, wherein each of the right eye drive step and the left eye drive step is the display panel. The driving order is changed according to the driving mode of the source line.

  According to this aspect, regardless of the driving mode, the rotation pattern of each of the right eye and the left eye is not fixed, and the striped pattern can be sufficiently diffused, so that the image quality is deteriorated when performing 3D display. Can be prevented.

  (5) The multiplex driving method according to the fifth aspect of the present invention is the right eye for setting the driving order of the first horizontal scanning period of the right eye image in any of the first to fourth aspects. A drive order setting step; and a left-eye drive order setting step for setting a drive order for the first horizontal scanning period of the left-eye image. In the right-eye drive step, the right-eye drive order is set in each vertical scanning period. The plurality of source lines are driven based on the right-eye image data by multiplex driving in which the driving order is shifted every horizontal scanning period from the driving order set in the setting step, and in the left-eye driving step, In each vertical scanning period, the driving order is shifted every horizontal scanning period from the driving order set in the left-eye driving order setting step. By multiplex driving has to drive the plurality of source lines on the basis of the left-eye image data.

  In this aspect, the drive order can be changed for each of the right eye and the left eye. As a result, the stripe pattern can be sufficiently diffused without the rotation patterns of the right eye and the left eye being fixed more flexibly, and it is possible to prevent deterioration in image quality when performing 3D display. become able to.

  (6) According to a sixth aspect of the present invention, one source output is output to a plurality of source lines of a display panel based on right-eye image data and left-eye image data corresponding to successive right-eye images and left-eye images, respectively. A driving device that divides and drives each source line is initialized by a first counter that updates a count value every 2 × n (n is a natural number) vertical scanning period, and a vertical synchronization signal, and is driven every horizontal scanning period. A second counter that updates the count value, a third counter that is initialized by the horizontal synchronization signal and updates the count value corresponding to the multiplex drive timing within one horizontal scanning period, and the first counter Based on the count value, the count value of the second counter, and the count value of the third counter, a multiplex decod that generates a multiplex control signal is generated. Includes loaders, on the basis of the multiplex control signal, and a source line driver for supplying to one of said plurality of source lines by the multiplex driving.

  In this aspect, the driving order of the multiplex driving in the first horizontal scanning period of each of the right-eye image and the left-eye image is changed every 2 × n vertical scanning period. In each vertical scanning period of the right-eye image and the left-eye image, the driving device drives the plurality of source lines by changing the driving order in the immediately preceding horizontal scanning period every one horizontal scanning period in order from the changed driving order. To do. As a result, the rotation pattern of each of the right eye and the left eye is not fixed, and the stripe pattern can be sufficiently diffused. Thus, a driving device that prevents deterioration in image quality when performing 3D display is provided. become able to.

  (7) According to a seventh aspect of the present invention, in the sixth aspect, the driving device according to the sixth aspect includes the first horizontal scanning period of the left-eye image based on the driving order of the first horizontal scanning period of the right-eye image. An offset register in which an offset corresponding to the number of shifts in the driving order is set, and the multiplex decoder includes a count value of the first counter, a count value of the second counter, and a count value of the third counter The multiplex control signal is generated based on the count value and the offset.

  According to this aspect, the offset can be set according to the right-eye image and the left-eye image. As a result, the right eye and left eye rotation patterns are not fixed without depending on the type of image, and the stripe pattern can be sufficiently diffused to prevent deterioration of image quality when performing 3D display. Will be able to.

  (8) In the driving device according to the eighth aspect of the present invention, in the sixth aspect or the seventh aspect, the pattern corresponding to the driving order of the first horizontal scanning period of the right-eye image is set. And a second pattern register in which a pattern corresponding to the driving order of the first horizontal scanning period of the left-eye image is set, and the multiplex decoder is set in the first pattern register The right eye multiplex control signal is generated based on the pattern, and the left eye multiplex control signal is generated based on the pattern set in the second pattern register.

  According to this aspect, the drive order can be set according to the right-eye image and the left-eye image. As a result, the right eye and left eye rotation patterns are not fixed without depending on the type of image, and the stripe pattern can be sufficiently diffused to prevent deterioration of image quality when performing 3D display. Will be able to.

  (9) In the driving device according to the ninth aspect of the present invention, in any one of the sixth to eighth aspects, the vertical synchronizing signal supplied to the first counter differs depending on the driving mode. A synchronization signal selection circuit is included.

  According to this aspect, regardless of the driving mode, the rotation pattern of each of the right eye and the left eye is not fixed, and the striped pattern can be sufficiently diffused, so that the image quality is deteriorated when performing 3D display. Can be prevented.

  (10) In the driving device according to a tenth aspect of the present invention, in any one of the sixth to ninth aspects, the first counter updates a count value for each vertical scanning period in the right-eye image. And a fifth counter that updates a count value for each vertical scanning period in the left-eye image, wherein the multiplex decoder counts the fourth counter with respect to the right-eye image. The multiplex control signal is generated using a value, and the multiplex control signal is generated using the count value of the fifth counter for the left-eye image.

  According to the present aspect, the right eye and the left eye rotation patterns are not fixed, and the stripe pattern can be sufficiently diffused to provide a drive device that prevents deterioration in image quality when performing 3D display. Will be able to.

  (11) In an eleventh aspect of the present invention, an electro-optical device includes the display panel and the driving device according to any one of the sixth to tenth aspects that drives a source line of the display panel. .

  According to this aspect, it is possible to provide an electro-optical device that prevents deterioration in image quality when performing 3D display.

  (12) In a twelfth aspect of the present invention, an electronic device includes the drive device according to any one of the sixth to tenth aspects.

  According to this aspect, it is possible to provide an electronic apparatus to which a driving device that prevents deterioration of image quality when performing 3D display is applied.

1 is a diagram showing an outline of a configuration of a liquid crystal display device according to a first embodiment of the present invention. The block diagram of the structural example of the source driver of FIG. FIG. 3 is an operation explanatory diagram of the multiplexing circuit of FIG. 2. Operation | movement explanatory drawing of a demultiplexer. The figure which shows the structural example of the multiplex control signal generation part in the comparative example of 1st Embodiment. FIG. 6 is an operation explanatory diagram of the multiplex decoder of FIG. 5. Explanatory drawing of the 1st drive example by the structure of FIG. 8A and 8B are explanatory diagrams of the rotation pattern visible in the right eye and the left eye in FIG. Explanatory drawing of the 2nd drive example by the structure of FIG. 10 (A) and 10 (B) are explanatory diagrams of rotation patterns visible in the right eye and the left eye in FIG. Explanatory drawing of the 3rd drive example by the structure of FIG. 12A and 12B are explanatory diagrams of a rotation pattern that can be seen in the right eye and the left eye in FIG. The flowchart of the example of a process of the drive device in 1st Embodiment. The figure which shows the structural example of the multiplex control signal generation part in 1st Embodiment. FIG. 15A and FIG. 15B are explanatory diagrams of a first driving example having the configuration of FIG. Explanatory drawing of the 2nd drive example by the structure of FIG. Explanatory drawing of the 2nd drive example by the structure of FIG. Explanatory drawing of the 3rd drive example by the structure of FIG. Explanatory drawing of the 3rd drive example by the structure of FIG. The figure which shows the structural example of the multiplex control signal generation part in 2nd Embodiment. FIG. 21 is an explanatory diagram of a third driving example having the configuration of FIG. 20. The figure which shows the structural example of the multiplex control signal generation part in 3rd Embodiment. FIG. 23 is an explanatory diagram of a third driving example having the configuration of FIG. 22. The figure which shows the structural example of the multiplex control signal generation part in 4th Embodiment. FIG. 25 is an explanatory diagram of a third driving example having the configuration of FIG. 24. Explanatory drawing of the drive mode in 5th Embodiment. The figure which shows an example of the timing of the drive mode in 5th Embodiment. The figure which shows the structural example of the multiplex control signal generation part in 5th Embodiment. 1 is a diagram showing an outline of a configuration of a projector system to which a liquid crystal display device according to the present invention is applied. The figure which shows the outline | summary of a structure of the optical system of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily indispensable configuration requirements for solving the problems of the present invention.

[First Embodiment]
FIG. 1 shows an outline of the configuration of the liquid crystal display device according to the first embodiment of the present invention.
The liquid crystal display device (electro-optical device in a broad sense) 10 includes a liquid crystal panel (display panel, electro-optical panel) 12 and a driving device 50. The driving device 50 includes a source driver 20 and a gate driver 40. A power supply circuit 60 and a display controller 70 are provided outside the liquid crystal display device 10. The liquid crystal display device 10 is not limited to the configuration shown in FIG. 1 and may incorporate at least part of the functions of the power supply circuit 60 or the display controller 70.

  The liquid crystal panel 12 is composed of, for example, an active matrix type liquid crystal panel. On the liquid crystal substrate constituting the liquid crystal panel 12, a plurality of gate lines G1 to GM (M is a natural number of 2 or more) arranged in the Y direction and extending in the X direction are arranged. The liquid crystal substrate has a plurality of source lines (data lines) S01 to S71, S02 to S72,..., S0N to S7N (N is a natural number of 2 or more) arranged in the X direction and extending in the Y direction. Be placed. Further, the liquid crystal substrate is provided with source signal supply lines S1 to SN (source voltage supply lines), and demultiplexers DMUX1 to DMUXN are provided corresponding to the source signal supply lines. The demultiplexers DMUX1 to DMUXN may be built in the source driver 20.

  This liquid crystal substrate is provided with thin film transistors at positions corresponding to the intersections of the gate lines (scanning lines) G1 to GM and the source lines S01 to S71, S02 to S72,..., S0N to S7N. For example, the thin film transistor Tjk-0 is provided at a position corresponding to an intersection between the gate line Gj (j is a natural number equal to or less than M) and the source line S0k (k is a natural number equal to or less than N). The thin film transistor Tjk-0 has a gate electrode connected to the gate line Gj, a source electrode connected to the source line S0k, and a drain electrode connected to the pixel electrode PEjk-0. A liquid crystal capacitor CLjk-0 (liquid crystal element, in a broad sense, an electro-optical element) is formed between the pixel electrode PEjk-0 and the counter electrode CE (common electrode, common electrode).

  The demultiplexers DMUX1 to DMUXN supply the time-division source voltage supplied to the source signal supply line by dividing (separating, demultiplexing) the source voltage. Specifically, the demultiplexer DMUXk includes switch elements (a plurality of demultiplexing switching elements) corresponding to each source line. Then, the switch elements are turned on / off by multiplex control signals SEL0 to SEL7 from the source driver 20, and the source voltage supplied to the source signal supply line Sk is divided and supplied to the source lines S0k to S7k.

  In FIG. 1, only the demultiplexer DMUXk and the source lines S0k to S7k corresponding to the source signal supply line Sk are illustrated for the sake of simplicity. Further, only the thin film transistor provided at the position corresponding to the intersection of the source lines S0k to S7k and the gate line Gj is illustrated. The same applies to demultiplexers and source lines corresponding to other source signal supply lines, and thin film transistors provided at positions corresponding to intersections between other source lines and gate lines.

  The source driver 20 outputs the source voltage time-divided based on the image data (gradation data) to the source signal supply lines S1 to SN, and drives the source signal supply lines S1 to SN. On the other hand, the gate driver 40 scans (sequentially drives) the gate lines G1 to GM of the liquid crystal panel 12.

  Based on a reference voltage (power supply voltage) supplied from the outside, the power supply circuit 60 has various voltage levels (for example, a reference voltage for gradation voltage generation) necessary for driving the liquid crystal panel 12 and the counter electrode CE. A voltage level of the counter electrode voltage VCOM is generated.

  The display controller 70 controls the source driver 20, the gate driver 40, and the power supply circuit 60. For example, the display controller 70 sets an operation mode and supplies an internally generated vertical synchronization signal and horizontal synchronization signal to the source driver 20 and the gate driver 40. For example, the display controller 70 performs these controls according to the contents set by a host including a central processing unit (CPU) (not shown).

  In FIG. 1, the case where the source voltage is supplied from one source signal supply line to eight source lines has been described as an example, but the source is supplied from one source signal supply line to another number of source lines. A voltage may be supplied. Hereinafter, an example in which a source voltage is supplied from one source signal supply line to eight source lines will be described.

FIG. 2 shows a block diagram of a configuration example of the source driver 20 of FIG.
The source driver 20 includes a shift register 22, line latches 24 and 26, and a multiplexing circuit 28. The source driver 20 includes a reference voltage generation circuit (gradation voltage generation circuit) 30, a DAC (Digital-to-Analog Converter) 32, a source line drive circuit (source line drive unit) 34, and a drive control unit 36. And a precharge voltage generation circuit 38.

  The shift register 22 includes a plurality of flip-flops provided corresponding to the source lines and sequentially connected. The shift register 22 operates in synchronization with the pixel clock CLK. When the first flip-flop holds the enable input / output signal EIO, the enable input / output signal EIO is sequentially shifted to adjacent flip-flops. The pixel clock CLK and the enable input / output signal EIO are supplied from the display controller 70, for example.

  Image data DIO is input to the line latch 24. The line latch 24 latches the image data DIO in synchronization with the sequentially shifted enable input / output signal EIO from the shift register 22.

  The line latch 26 latches the image data of one horizontal scanning unit latched by the line latch 24 in synchronization with a latch pulse LP which is a horizontal synchronizing signal for display. The latch pulse LP is illustrated as being generated by the source driver 20, but may be supplied from the display controller 70. In this case, the latch pulse LP can be the horizontal synchronization signal HSYNC from the display controller 70.

  The multiplexing circuit 28 receives the image data corresponding to each source line latched by the line latch 26, time-division multiplexes the image data corresponding to eight source lines, and corresponds to each source signal supply line. Divided and multiplexed image data is output. The multiplexing circuit 28 multiplexes the image data based on the multiplex control signals SEL0 to SEL7 from the drive control unit 36.

  The reference voltage generation circuit 30 generates a plurality of reference voltages (grayscale voltages) and supplies them to the DAC 32. The reference voltage generation circuit 30 generates a plurality of reference voltages based on the voltage level supplied from the power supply circuit 60, for example.

  The DAC 32 generates an analog gradation voltage to be supplied to each source line based on digital image data. Specifically, the DAC 32 receives time-division multiplexed image data from the multiplexing circuit 28 and a plurality of reference voltages from the reference voltage generation circuit 30 and receives time-division multiplexed image data corresponding to the time-division multiplexed image data. A multiplexed gradation voltage is generated.

  The source line driving circuit 34 buffers the gradation voltage from the DAC 32 (impedance conversion in a broad sense) and outputs the source voltage to the source signal supply lines S1 to SN, and the source lines S01 to S71, S02 to S72,. ..S0N to S7N are driven. For example, the source line driver circuit 34 buffers the grayscale voltage by a voltage follower-connected operational amplifier provided in each source signal supply line. Such a source line driver circuit 34 can precharge the source line before driving the source line based on the gradation voltage.

  The drive control unit 36 controls each unit constituting the source driver 20 so that the polarity of the voltage applied to the liquid crystal element of the liquid crystal panel 12 is inverted at a given polarity inversion period. The drive control unit 36 generates, for example, a latch pulse LP, multiplex control signals SEL0 to SEL7 that define the time division timing of the source voltage, and a precharge control signal. Specifically, the drive control unit 36 generates a latch pulse LP according to the display timing in response to the horizontal synchronization signal HSYNC from the display controller 70 and outputs the latch pulse LP to the line latch 26, for example.

  The drive control unit 36 includes a multiplex control signal generation unit 37. The multiplex control signal generator 37 generates multiplex control signals SEL0 to SEL7 according to the drive timing of the source lines, and outputs them to the multiplexing circuit 28 and the demultiplexers DMUX1 to DMUXN. When displaying the right-eye image and the left-eye image for 3D display, the multiplex control signal generation unit 37 changes the multiplex drive drive order at a given change timing so that the striped pattern is not diffused and seen. Multiplex control signals SEL0 to SEL7 are generated. Specifically, the drive control unit 36 changes the driving order of the plurality of source lines in the first horizontal scanning period of each of the right-eye image and the left-eye image every 2 × n (n is a natural number) vertical scanning period. Multiplex control signals SEL0 to SEL7 are generated as described above. Then, in each vertical scanning period, the drive control unit 36 generates the multiplex control signals SEL0 to SEL7 so as to change the driving order in the immediately preceding horizontal scanning period every one horizontal scanning period in order from this driving order. In each horizontal scanning period, the driving order is completely different from the driving order in the immediately preceding horizontal scanning period, and the driving order is distributed.

  Further, the drive control unit 36 generates a precharge control signal for performing precharge control of the source line. With this precharge control signal, precharge control enable control and disable control can also be performed.

  The precharge voltage generation circuit 38 generates one or a plurality of precharge voltages for the positive polarity and the negative polarity, and outputs them to the source line drive circuit 34. The precharge voltage generation circuit 38 supplies the precharge voltage designated by the precharge control signal to the source line drive circuit 34 at the timing designated by the precharge control signal. The precharge voltage generation circuit 38 generates one or a plurality of precharge voltages based on, for example, a voltage level supplied from the power supply circuit 60.

  Here, the multiplex drive in the first embodiment will be described by focusing on the source signal supply line Sk.

FIG. 3 shows an operation explanatory diagram of the multiplexing circuit 28 of FIG. In FIG. 3, it is assumed that the image data GD0 to GD7 for the source lines S0k to S7k are latched by the line latch 26.
The multiplexing circuit 28 selectively outputs the image data GD0 for the source line S0k when the multiplex control signal SEL0 is at the H level, and the image data GD1 for the source line S1k when the multiplex control signal SEL1 is at the H level. Select output. Similarly, the multiplexing circuit 28 selectively outputs the corresponding image data for the source line when each of the multiplex control signals SEL2 to SEL7 is at the H level. As a result, the multiplexing circuit 28 generates multiplexed data in which the image data GD0 to GD7 are time-division multiplexed based on the multiplex control signals SEL0 to SEL7 which become H level once in one horizontal scanning period. To do.

  The DAC 32 receives the time-division multiplexed image data GD0 to GD7, selects and outputs a gradation voltage corresponding to each image data from a plurality of reference voltages, and the time-division multiplexed gradation voltage. Is output.

FIG. 4 shows an operation explanatory diagram of the demultiplexer DMUXk. FIG. 4 is a diagram illustrating the operation of the demultiplexer DMUXk, but the same applies to other demultiplexers.
The source line drive circuit 34 of the source driver 20 receives the multiplexed gradation voltage from the DAC 32 and outputs the multiplexed source voltages V0 to V7 within one horizontal scanning period. The demultiplexer DMUXk is supplied with multiplex control signals SEL0 to SEL7 as demultiplex switch signals. The demultiplexer DMUXk outputs the source voltage V0 to the source line S0k when the multiplex control signal SEL0 is at the H level, and outputs the source voltage V1 to the source line S1k when the multiplex control signal SEL1 is at the H level. Similarly, the demultiplexer DMUXk outputs the corresponding source voltage to the corresponding source line when each of the multiplex control signals SEL2 to SEL7 is at the H level.

  In this way, the demultiplexer DMUXk separates the multiplexed source voltages V0 to V7 supplied to the source signal supply line Sk and outputs them to the source lines S0k to S7k.

  By the way, the driving order of the source lines in the multiplex driving can be changed by shifting the rotation pattern with the following configuration. The rotation pattern corresponds to the driving order of the source lines. By generating the multiplex control signals SEL0 to SEL7 based on the rotation pattern, the driving order of the source lines in the multiplex driving can be changed.

FIG. 5 shows a configuration example of the multiplex control signal generation unit in the comparative example of the first embodiment. The multiplex control signal generation unit 80 in this comparative example is applied to the drive control unit 36 instead of the multiplex control signal generation unit 37 of FIG.
The multiplex control signal generator 80 includes a VSYNC rotation counter 100, an HSYNC rotation counter 110, and a multiplex counter 120. The multiplex control signal generation unit 80 includes a multiplex drive timing generation unit 130, a multiplex decoder 140, and adders 132 and 134.

  The multiplex control signal generator 80 receives the vertical synchronization signal VSYNC and the horizontal synchronization signal HSYNC from the display controller 70. The VSYNC rotation counter 100 is a 3-bit counter that counts up (updates in a broad sense; the same applies hereinafter) every vertical scanning period based on the vertical synchronization signal VSYNC. The HSYNC rotation counter 110 is a 3-bit counter whose count value is initialized by the vertical synchronization signal VSYNC and counts up every horizontal scanning period based on the horizontal synchronization signal HSYNC. The multiplex counter 120 is a 3-bit counter whose count value is initialized based on the horizontal synchronization signal HSYNC and counts up according to the multiplex drive timing generated by the multiplex drive timing generation unit 130. The multiplex drive timing generation unit 130 generates a timing signal indicating the timing at which one of the multiplex control signals SEL <b> 0 to SEL <b> 7 becomes active within one horizontal scanning period, for example, in synchronization with the pixel clock CLK from the display controller 70. . The multiplex counter 120 updates the count value in synchronization with the rising edge of the timing signal.

  The adder 132 is a 3-bit adder that adds the count value of the VSYNC rotation counter 100 and the count value of the HSYNC rotation counter 110. The adder 134 is a 3-bit adder that adds the addition result of the adder 132 and the count value of the multiplex counter 120. Note that the adders 132 and 134 may be realized by one adder. The multiplex decoder 140 performs a decoding process corresponding to the 3-bit addition result of the adder 134, and generates multiplex control signals SEL0 to SEL7.

FIG. 6 shows an operation explanatory diagram of the multiplex decoder 140 of FIG. FIG. 6 represents an example of the 3-bit addition result of the adder 134 and the multiplex control signals SEL0 to SEL7 with the time axis on the horizontal axis.
The multiplex decoder 140 decodes the 3-bit addition result of the adder 134, and any one of them is an H level multiplex control signal SEL0 to SEL7, or all are H level or L level multiplex control signals SEL0 to SEL7. Is output. Specifically, when the addition result is “0”, the multiplex decoder 140 sets the multiplex control signal SEL0 to the H level and the multiplex control signals SEL1 to SEL7 to the L level. When the addition result is “1”, the multiplex decoder 140 sets the multiplex control signal SEL1 to the H level and sets the multiplex control signals SEL0 and SEL2 to SEL7 to the L level. Similarly, when the addition result is “7”, the multiplex decoder 140 sets the multiplex control signal SEL7 to H level and the multiplex control signals SEL0 to SEL6 to L level. Note that in the precharge period when the precharge control is enabled, all the multiplex control signals SEL0 to SEL7 are at the H level.

  According to such a multiplex control signal generation unit 80, the count value corresponding to the drive order is incremented by one for each horizontal scanning period on the basis of the drive order corresponding to the count value of the VSYNC rotation counter 100. The output of the adder 132 is obtained. Accordingly, an output is obtained in which the driving order is shifted by one for each horizontal scanning period. By adding the count value of the multiplex counter 120 to this, the multiplex control signals SEL0 to SEL7 corresponding to the rotation can be generated.

  However, in the 2D display, pixels connected to the respective source lines appear to be uniform. However, when this rotation function is applied to the 3D display as it is, there are the following problems. In the following, for convenience of explanation, only the rotation pattern (starting rotation pattern) in the first horizontal scanning period of each vertical scanning period is illustrated, but in actuality, in each vertical scanning period, the rotation pattern is set for each horizontal scanning period. Is changed.

  FIG. 7 is an explanatory diagram of a first driving example according to the configuration of FIG. 5 at the time of 3D display. In the first driving example, the right-eye image and the left-eye image are alternately driven every vertical scanning period. FIG. 7 shows an example in which 3D video is viewed using the active shutter method. The shutter represents an example of controlling the right-eye shutter when the image is for the right eye, and the left-eye shutter when the image is for the left eye. This represents a control example. Also, the VSYNC count value in FIG. 7 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the rotation pattern (start rotation pattern) in the first horizontal scanning period (first horizontal scanning period in the first vertical scanning period) of the right-eye image is “01234567”, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level. Become. This shows a rotation pattern in the first horizontal scanning period in the vertical scanning period in which the VSYNC count value is “0”. In this vertical scanning period, in the next horizontal scanning period, the rotation pattern is changed to, for example, “04261537”, and thereafter, sequentially distributed in subsequent horizontal scanning periods based on the driving order in the immediately preceding horizontal scanning period. Is done. At this time, the image for the right eye is displayed, and the shutter for the right eye opens from the second half of the vertical scanning period in order to reduce crosstalk. In the next vertical scanning period, the start rotation pattern is shifted from “01234567” by one to “12345670”, and the multiplex control signals SEL1 to SEL7 and SEL0 sequentially become H level. Even in this vertical scanning period, the horizontal rotation period is dispersed for each horizontal scanning period with reference to the start rotation pattern “12345670”. At this time, the left-eye image is displayed, and the left-eye shutter is opened from the latter half of the vertical scanning period in order to reduce crosstalk. Similarly, in the vertical scanning period in which the left-eye image is displayed, the rotation pattern is changed every horizontal scanning period.

  FIG. 8A and FIG. 8B are explanatory diagrams of rotation patterns visible in the right eye and the left eye in FIG. FIG. 8A shows a rotation pattern for displaying a right eye image opened by a right eye shutter and a rotation pattern for displaying a left eye image opened by a left eye shutter among the rotation patterns shown in FIG. Represents. FIG. 8B shows a rotation pattern visible to the right eye and a rotation pattern visible to the left eye.

  Of the rotation patterns shown in FIG. 7, in principle, the right eye is not visible when the right eye image is displayed, and the right eye is not visible when the left eye image is displayed. Therefore, the rotation patterns when the images are actually visible to the right eye and the left eye are summarized as shown in FIG. This means that, as shown in FIG. 8B, only four patterns can be seen by the right eye and the left eye. That is, the rotation pattern is fixed between the right eye and the left eye, and the stripe pattern is not sufficiently diffused.

  Next, in order to prevent crosstalk during 3D display, consider a second driving example in which images for the right eye are continuously displayed and then images for the left eye are continuously displayed.

  FIG. 9 is an explanatory diagram of a second driving example according to the configuration of FIG. 5 at the time of 3D display. FIG. 9 shows an example in which 3D video is viewed using the active shutter method. For the shutter, the control example of the shutter for the right eye is displayed when the image is for the right eye, and the shutter for the left eye is displayed when the image is for the left eye. This represents a control example. Further, the VSYNC count value in FIG. 9 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the start rotation pattern in the first horizontal scanning period in which the VSYNC count value of the right-eye image is “0” is “01234567”, the multiplex control signals SEL0 to SEL7 sequentially become H level. Thereafter, the rotation pattern is dispersed every horizontal scanning period with reference to the rotation pattern. At this time, the right-eye image is displayed and the right-eye shutter remains closed. In the next vertical scanning period, the start rotation pattern is shifted by one, and the multiplex control signals SEL1 to SEL7 and SEL0 sequentially become H level. Thereafter, the rotation pattern is dispersed every horizontal scanning period with reference to the rotation pattern. At this time, the image for the right eye is displayed and the shutter for the right eye is opened. The same applies to the left-eye image.

  FIGS. 10A and 10B are explanatory diagrams of rotation patterns that can be seen in the right eye and the left eye in FIG. FIG. 10A shows a rotation pattern for displaying a right eye image opened by a right eye shutter and a rotation pattern for displaying a left eye image opened by a left eye shutter among the rotation patterns shown in FIG. Represents. FIG. 10B shows a rotation pattern visible to the right eye and a rotation pattern visible to the left eye.

  10A is a summary of the rotation patterns when the images are actually visible to the right eye and the left eye. As a result, as shown in FIG. 10B, this means that only two patterns are visible to the right eye and the left eye. That is, although the crosstalk can be prevented, the rotation pattern is fixed by the right eye and the left eye, and the striped pattern is not sufficiently diffused.

  Next, a third driving example for preventing crosstalk and spreading a striped pattern during 3D display will be considered. In the third driving example, driving is performed in three types of driving modes, and a right-eye image for two frames is continuously displayed at a high display frequency, and then a right-eye image for one frame is displayed at a low display frequency. The same applies to the subsequent left-eye image.

  FIG. 11 is an explanatory diagram of a third driving example according to the configuration of FIG. 5 at the time of 3D display. FIG. 11 shows an example in which 3D video is viewed by the active shutter method. For the shutter, the control example of the shutter for the right eye is shown when the image is for the right eye, and the shutter for the left eye is shown when the image is for the left eye. This represents a control example. Further, the VSYNC count value in FIG. 11 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the start rotation pattern in the first horizontal scanning period in which the VSYNC count value of the right-eye image is “0” is “01234567”, the multiplex control signals SEL0 to SEL7 sequentially become H level. Thereafter, the rotation pattern is dispersed every horizontal scanning period with reference to the rotation pattern. At this time, the right-eye image is displayed at a high display frequency, and the right-eye shutter remains closed. In the next vertical scanning period, the start rotation pattern is shifted by one, and the multiplex control signals SEL1 to SEL7 and SEL0 are sequentially set to the H level, and are distributed every horizontal scanning period with reference to the start rotation pattern. Also at this time, the image for the right eye is displayed at a high display frequency, and the shutter for the right eye is opened, for example. Further, in the next vertical scanning period, the start rotation pattern is shifted by one, and the multiplex control signals SEL2 to SEL7, SEL0, and SEL1 are sequentially set to the H level, and are dispersed every horizontal scanning period based on the start rotation pattern. Is done. At this time, the image for the right eye is displayed at a low display frequency, and the shutter for the right eye is opened. The same applies to the left-eye image.

  FIGS. 12A and 12B are explanatory diagrams of rotation patterns that can be seen in the right eye and the left eye in FIG. FIG. 12A shows a rotation pattern for displaying a right eye image opened by a right eye shutter and a rotation pattern for displaying a left eye image opened by a left eye shutter among the rotation patterns shown in FIG. Represents. FIG. 12B shows a rotation pattern visible to the right eye and a rotation pattern visible to the left eye.

  The rotation patterns when the images are actually visible to the right eye and the left eye are summarized as shown in FIG. This means that, as shown in FIG. 12B, only four patterns can be seen by the right eye and the left eye. That is, although the crosstalk can be prevented, the rotation pattern is fixed by the right eye and the left eye, and the striped pattern is not sufficiently diffused.

  As described above, there is a problem that the rotation pattern is fixed even if the rotation function is simply used for 3D display. Therefore, in the first embodiment, the rotation pattern is changed as follows, and a right-eye image and a left-eye image for 3D display are displayed.

FIG. 13 shows a flowchart of a processing example of the driving device 50 in the first embodiment.
First, in the multiplex control signal generation unit 37 of the drive control unit 36, the drive device 50 sets a rotation pattern (start rotation pattern) corresponding to a given drive order as an initial value (step ST10).

  Next, the driving device 50 scans the gate lines of the liquid crystal panel 12 and performs a plurality of source lines based on the right-eye image data of the right-eye image by multiplex driving corresponding to the driving order set in step ST10. Is driven (step ST12, right eye driving step). In step ST12, in each vertical scanning period, the driving order in the immediately preceding horizontal scanning period is changed every horizontal scanning period in order from the driving order set in step ST10. In such a step ST12, a plurality of source lines are driven based on the right-eye image data by the multiplex driving described above over one or a plurality of vertical scanning periods.

  Further, the driving device 50 scans the gate lines of the liquid crystal panel 12 and performs a multiplex driving corresponding to the driving order set in step ST10, to thereby select a plurality of source lines based on the left eye image data of the left eye image. Drive (step ST14, left eye drive step). In step ST14, in each vertical scanning period, the driving order in the immediately preceding horizontal scanning period is changed every horizontal scanning period in order from the driving order set in step ST10. In such a step ST14, a plurality of source lines are driven based on the left-eye image data by the multiplex driving described above over one or a plurality of vertical scanning periods. A driving step is configured by steps ST12 and ST14.

  Here, when the 3D display ends (step ST16: Y), the driving device 50 ends the series of processes (end). On the other hand, when the 3D display is not finished (step ST16: N), the driving device 50 changes the driving order of the plurality of source lines in the first horizontal scanning period of the right-eye image or the left-eye image (step ST18, driving). Reorder step). Specifically, the driving order of the plurality of source lines in the first horizontal scanning period of the right-eye image and the left-eye image is changed every 2 × n vertical scanning period. Then, it returns to step ST12. In step ST12, the driving device 50 scans the gate lines of the liquid crystal panel 12 and performs a plurality of sources based on the left-eye image data of the left-eye image by multiplex driving corresponding to the driving order set in step ST18. The line is driven (step ST12). At this time, in each vertical scanning period, the driving order in the immediately preceding horizontal scanning period is changed every horizontal scanning period in order from the driving order set in step ST18.

FIG. 14 shows a configuration example of the multiplex control signal generation unit 37 in the first embodiment. In FIG. 14, the same parts as those in FIG.
The multiplex control signal generation unit 37 includes a VSYNC rotation counter (first counter) 100, an HSYNC rotation counter (second counter) 110, and a multiplex counter (third counter) 120. The multiplex control signal generation unit 37 includes a multiplex drive timing generation unit 130, a multiplex decoder 140, a frequency divider 142, and adders 132 and 134.

  The multiplex control signal generator 37 receives the vertical synchronization signal VSYNC and the horizontal synchronization signal HSYNC from the display controller 70. The frequency dividing circuit 142 divides the vertical synchronization signal VSYNC. For example, when the right eye image and the left eye image are alternately displayed every one vertical scanning period as in the first driving example, the frequency dividing circuit 142 divides the vertical synchronization signal VSYNC by two. For example, when the left eye image is continuously displayed after the right eye image is continuously displayed in order to prevent crosstalk during the 3D display as in the second driving example described above, the frequency division is performed. The circuit 142 divides the vertical synchronization signal VSYNC by four. For example, in the case of displaying the right-eye image of one frame at a low display frequency after displaying the right-eye image of two frames at a high display frequency continuously as in the third driving example, the frequency divider 142 is The vertical synchronization signal VSYNC is divided by six.

  The VSYNC rotation counter 100 is a 3-bit counter that counts up (updates in a broad sense) a count value every 2 × n vertical scanning periods based on the output of the frequency dividing circuit 142. The HSYNC rotation counter 110 is a 3-bit counter whose count value is initialized by the vertical synchronization signal VSYNC and counts up every horizontal scanning period based on the horizontal synchronization signal HSYNC. The multiplex counter 120 is a 3-bit counter whose count value is initialized based on the horizontal synchronization signal HSYNC and counts up according to the multiplex drive timing generated by the multiplex drive timing generation unit 130. The multiplex drive timing generation unit 130 generates a timing signal indicating the timing at which one of the multiplex control signals SEL0 to SEL7 becomes active within one horizontal scanning period, for example, in synchronization with the pixel clock CLK from the display controller 70. To do. The multiplex counter 120 updates the count value in synchronization with the rising edge of the timing signal.

  The adders 132 and 134 are the same as those in FIG. As shown in FIG. 6, the multiplex decoder 140 performs a decoding process corresponding to the 3-bit addition result of the adder 134, and generates multiplex control signals SEL0 to SEL7.

  FIGS. 15A and 15B are explanatory diagrams of a first driving example having the configuration of FIG. FIG. 15A illustrates an example in which 3D video is viewed using the active shutter method. For the shutter, the control example of the right-eye shutter is displayed when the image is for the right eye, and the left-eye is displayed when the image is for the left eye. This shows an example of shutter control. FIG. 15B is an explanatory diagram of a rotation pattern visible in the right eye and the left eye in FIG. Further, the VSYNC count value in FIG. 15A or 15B represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the start rotation pattern in the first horizontal scanning period in which the VSYNC count value of the right-eye image is “0” is “01234567”, the multiplex control signals SEL0 to SEL7 sequentially become H level. This shows a rotation pattern in the first horizontal scanning period in the vertical scanning period in which the VSYNC count value is “0”. In this vertical scanning period, in the next horizontal scanning period, the rotation pattern is changed to, for example, “04261537”, and thereafter, sequentially distributed in subsequent horizontal scanning periods based on the driving order in the immediately preceding horizontal scanning period. Is done. At this time, the image for the right eye is displayed, and the shutter for the right eye opens from the second half of the vertical scanning period in order to reduce crosstalk. In the next vertical scanning period, the start rotation pattern is not changed and remains “01234567”, and the multiplex control signals SEL0 to SEL7 sequentially become H level. In this vertical scanning period, the horizontal rotation period is dispersed every horizontal scanning period with reference to the start rotation pattern “12345670”. At this time, the left-eye image is displayed, and the left-eye shutter is opened from the latter half of the vertical scanning period in order to reduce crosstalk. Similarly, in the vertical scanning period in which the left-eye image is displayed, the rotation pattern is changed every horizontal scanning period.

  For this reason, in the first driving example, the rotation patterns when the images are actually visible to the right eye and the left eye are summarized as shown in FIG. This means that the right eye and the left eye can see eight patterns, respectively, and the right and left eyes do not fix the rotation pattern, and the stripe pattern is sufficiently diffused.

  Next, in order to prevent crosstalk during 3D display, consider a second driving example in which images for the right eye are continuously displayed and then images for the left eye are continuously displayed.

  FIGS. 16 and 17 are explanatory diagrams of a second driving example having the configuration of FIG. 14 in 3D display. FIG. 16 shows an example of viewing 3D video by the active shutter method. The shutter represents an example of controlling the right-eye shutter when the image is for the right eye, and the left-eye shutter when the image is for the left eye. This represents a control example. FIG. 17 is an explanatory diagram of rotation patterns visible in the right eye and the left eye in FIG. Also, the VSYNC count value in FIG. 16 or FIG. 17 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the start rotation pattern in the first horizontal scanning period in which the VSYNC count value of the right-eye image is “0” is “01234567”, the multiplex control signals SEL0 to SEL7 sequentially become H level. In this vertical scanning period, in the next horizontal scanning period, the rotation pattern is changed to, for example, “04261537”, and thereafter, sequentially distributed in subsequent horizontal scanning periods based on the driving order in the immediately preceding horizontal scanning period. Is done. At this time, the right-eye image is displayed and the right-eye shutter remains closed. In the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the start rotation pattern, and are distributed every horizontal scan period with reference to the start rotation pattern. The At this time, the image for the right eye is displayed and the shutter for the right eye is opened.

  For the subsequent left-eye image, the start rotation pattern remains “01234567”, and the multiplex control signals SEL <b> 0 to SEL <b> 7 sequentially become H level, and are dispersed every horizontal scanning period with reference to this start rotation pattern. At this time, the left-eye image is displayed, and the left-eye shutter remains closed. Even in the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the starting rotation pattern, and are distributed every horizontal scanning period based on the starting rotation pattern. The At this time, the left-eye image is displayed and the left-eye shutter is opened.

  Then, at the time of the next right-eye image, the start rotation pattern is shifted by one to become “12345670”, and display driving of the right-eye image and the left-eye image is performed as described above based on this rotation pattern.

  For this reason, in the second driving example, the rotation patterns when the images are actually visible to the right eye and the left eye are summarized as shown in FIG. After all, as shown in FIG. 17, it means that the right eye and the left eye can see 8 patterns respectively, and in addition to preventing crosstalk, the rotation pattern is not fixed between the right eye and the left eye. Indicates that the pattern is sufficiently diffused.

  Next, a third driving example for preventing crosstalk and spreading a striped pattern during 3D display will be considered.

  FIGS. 18 and 19 are explanatory views of a third driving example having the configuration of FIG. 14 in 3D display. FIG. 18 illustrates an example in which 3D video is viewed using the active shutter method. The shutter represents an example of control of the right-eye shutter when the image is for the right eye, and the left-eye shutter when the image is for the left eye. This represents a control example. FIG. 19 is an explanatory diagram of a rotation pattern visible in the right eye and the left eye in FIG. Further, the VSYNC count value in FIGS. 18 and 19 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  When the start rotation pattern in the first horizontal scanning period in which the VSYNC count value of the right-eye image is “0” is “01234567”, the multiplex control signals SEL0 to SEL7 sequentially become H level. In the vertical scanning period, the horizontal rotation period is dispersed for each horizontal scanning period with reference to the start rotation pattern. At this time, the right-eye image is displayed at a high display frequency, and the right-eye shutter remains closed. In the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the start rotation pattern, and are distributed every horizontal scan period with reference to the start rotation pattern. The Also at this time, the image for the right eye is displayed at a high display frequency, and the shutter for the right eye is opened, for example. Further, in the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the starting rotation pattern, and each horizontal scanning period is set based on the starting rotation pattern. Distributed. At this time, the image for the right eye is displayed at a low display frequency, and the shutter for the right eye is opened.

  For the subsequent left-eye image, the multiplex control signals SEL0 to SEL7 sequentially become H level while the start rotation pattern remains “01234567”. In the vertical scanning period, the horizontal rotation period is dispersed for each horizontal scanning period with reference to the start rotation pattern. At this time, the left-eye image is displayed at a high display frequency, and the left-eye shutter remains closed. In the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the start rotation pattern, and are distributed every horizontal scan period with reference to the start rotation pattern. The Also at this time, the image for the left eye is displayed at a high display frequency, and the shutter for the right eye is opened, for example. Further, in the next vertical scanning period, the multiplex control signals SEL0 to SEL7 are sequentially set to the H level without changing the starting rotation pattern, and each horizontal scanning period is set based on the starting rotation pattern. Distributed. At this time, the left-eye image is displayed at a low display frequency, and the left-eye shutter is opened.

  For this reason, in the third driving example, the rotation patterns when the images are actually visible to the right eye and the left eye are summarized as shown in FIG. After all, as shown in FIG. 19, it means that the right eye and the left eye can see eight patterns, respectively, and in addition to preventing crosstalk, the rotation pattern is not fixed in the right eye and the left eye. Indicates that the pattern is sufficiently diffused.

  As described above, in the first embodiment, the driving order of the multiplex drive in the first horizontal scanning period of each of the right-eye image and the left-eye image is changed every 2 × n vertical scanning period. By doing this, the rotation pattern is changed in units of a pair of right-eye and left-eye images for 3D display, and the stripe pattern is sufficiently diffused without fixing the rotation pattern in the right and left eyes. Will be able to.

[Second Embodiment]
In the first embodiment, the example in which the right-eye image and the corresponding left-eye image are driven in the same driving order has been described. However, the right-eye image and the corresponding left-eye image are driven in different driving orders. It is desirable. The second embodiment can be realized with a configuration substantially similar to that of the first embodiment, and only differences from the first embodiment will be described below.

  FIG. 20 shows a configuration example of a multiplex control signal generation unit according to the second embodiment of the present invention. The multiplex control signal generation unit 37a in the second embodiment can be applied to the drive control unit 36 instead of the multiplex control signal generation unit 37 of FIG. 20, parts that are the same as those in FIG. 14 are given the same reference numerals, and descriptions thereof will be omitted as appropriate.

  The multiplex control signal generation unit 37a includes a VSYNC rotation counter 100, an HSYNC rotation counter 110, and a multiplex counter 120. The multiplex control signal generator 37 a includes a multiplex drive timing generator 130, a multiplex decoder 140, a frequency divider 142, and adders 132 and 134. Further, the multiplex control signal generation unit 37 a includes an offset register 143, a selector 148, and an adder 150. The offset register 143 includes a right eye offset register 144 and a left eye offset register 146.

  In the offset register 143, the display controller 70 sets an offset corresponding to the number of shifts in the driving order of the first horizontal scanning period of the left-eye image with reference to the driving order of the first horizontal scanning period of the right-eye image. . Note that an offset corresponding to the number of shifts in the driving order of the first horizontal scanning period of the right-eye image may be set on the basis of the driving order of the first horizontal scanning period of the left-eye image.

  In the second embodiment, the offset register 143 is provided with a right-eye offset register 144 and a left-eye offset register 146 so that the offset for the right-eye image and the offset for the left-eye image can be set independently. . As a result, the degree of freedom in setting the offset can be further improved. The display controller 70 sets 3-bit data corresponding to the number of offsets in the right-eye offset register 144 and the left-eye offset register 146.

  The selector 148 selectively outputs the offset of the right eye offset register 144 or the offset of the left eye offset register 146 based on, for example, the lower 1 bit of the output of the frequency divider circuit 142. The adder 150 adds the output of the selector 148 and the addition result of the adder 134, and outputs a 3-bit addition result to the multiplex decoder 140. That is, the multiplex decoder 140 generates the multiplex control signals SEL0 to SEL7 based on the count values and offsets of the VSYNC rotation counter 100, the HSYNC rotation counter 110, and the multiplex counter 120.

  FIG. 21 is an explanatory diagram of a third driving example having the configuration of FIG. FIG. 21 is an explanatory diagram of rotation patterns that are visible to the right eye and the left eye when the number of offsets is “4” as the driving order of the left eye image, based on the driving order of the right eye image. Further, the VSYNC count value in FIG. 21 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  In the first horizontal scanning period in which the VSYNC count value is “0”, the start rotation pattern of the right eye image starts with “01234567”, and the start rotation pattern of the left eye image corresponding to this right eye image starts with “45670123”. That is, the driving order of the first horizontal scanning period of the left-eye image is shifted with reference to the driving order of the first horizontal scanning period of the right-eye image. Thereafter, as in the third driving example in the first embodiment, the start rotation pattern is changed for each of the right-eye image and the left-eye image.

  For this reason, in the third driving example, when the rotation patterns when the images are actually visible to the right eye and the left eye are summarized, the right eye and the left eye can see eight patterns. Therefore, in addition to preventing crosstalk, the stripe pattern is sufficiently diffused without the rotation pattern being fixed between the right eye and the left eye.

  In the example of FIG. 21, for example, the offset number “0” is set in the right eye offset register 144, and the offset number “4” is set in the left eye offset register 146. 21, the example in which the offset number is “4” has been described, but the offset number may be “7” or less excluding “4”. In FIG. 21, the third driving example has been described as an example, but the same applies to the first driving example or the second driving example.

  As described above, in the second embodiment, prior to changing the driving order, the driving order of the first horizontal scanning period of the left-eye image is based on the driving order of the first horizontal scanning period of the right-eye image. An offset setting step for setting an offset corresponding to the number of shifts can be included. At this time, the left-eye image has a plurality of driving orders shifted by the number of shifts corresponding to the offset in the first horizontal scanning period of the left-eye image based on the driving order of the first horizontal scanning period of the right-eye image. Drive the source line.

[Third Embodiment]
In the first embodiment or the second embodiment, the start rotation pattern used in the right-eye image matches or is shifted from the start rotation pattern used in the left-eye image, but is not limited thereto. is not. In the third embodiment, the start rotation pattern used for the right-eye image and the start rotation pattern used for the left-eye image are set separately. The third embodiment can be realized with substantially the same configuration as that of the first embodiment, and only differences from the first embodiment will be described below.

  FIG. 22 shows a configuration example of a multiplex control signal generation unit according to the third embodiment of the present invention. The multiplex control signal generator 37b in the third embodiment can be applied to the drive controller 36 instead of the multiplex control signal generator 37 of FIG. In FIG. 22, the same parts as those in FIG. 14 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The multiplex control signal generation unit 37b includes a VSYNC rotation counter 100, an HSYNC rotation counter 110, and a multiplex counter 120. The multiplex control signal generator 37 b includes a multiplex drive timing generator 130, a multiplex decoder 140, a frequency divider 142, and adders 132 and 134. Further, the multiplex control signal generation unit 37b includes a right-eye rotation pattern register 152, a left-eye rotation pattern register 154, a selector 156, and an adder 158.

  In the right-eye rotation pattern register (first pattern register) 152, the display controller 70 sets a start rotation pattern corresponding to the driving order of the first horizontal scanning period of the right-eye image. In the left eye rotation pattern register (second pattern register) 154, the display controller 70 sets a start rotation pattern corresponding to the driving order of the first horizontal scanning period of the left eye image.

  The selector 156 selectively outputs the rotation pattern of the right-eye rotation pattern register 152 or the rotation pattern of the left-eye rotation pattern register 154 based on, for example, the lower 1 bit of the output of the frequency dividing circuit 142. The adder 158 adds the output of the selector 156 and the addition result of the adder 134, and outputs a 3-bit addition result to the multiplex decoder 140. That is, the multiplex decoder 140 generates the right-eye multiplex control signals SEL0 to SEL7 based on the rotation pattern set in the right-eye rotation pattern register 152. The multiplex decoder 140 generates the left-eye multiplex control signals SEL0 to SEL7 based on the rotation pattern set in the left-eye rotation pattern register 154.

  FIG. 23 is an explanatory diagram of a third driving example having the configuration of FIG. FIG. 23 shows a case where the rotation pattern “01234567” is set in the rotation pattern register 152 for the right eye and “0461357” is set in the rotation pattern register 154 for the left eye. Further, the VSYNC count value in FIG. 23 represents the count value of the vertical synchronization signal VSYNC in 3 bits.

  In the first horizontal scanning period in which the VSYNC count value is “0”, the start rotation pattern of the right-eye image starts with “01234567”. Thereafter, the right-eye image is displayed in the same rotation pattern until the VSYNC count value becomes “2”. At this time, a plurality of source lines are driven based on the right-eye image data by multiplex driving in which the driving order is shifted in sequence for each horizontal scanning period from “01234567” set in the right-eye rotation pattern register 152. .

  Next, the start rotation pattern of the image for the left eye corresponding to the image for the right eye starts with “02461357”. Thereafter, the left-eye image is displayed in the same rotation pattern until the VSYNC count value becomes “5”. At this time, a plurality of source lines are driven based on the left-eye image data by multiplex driving in which the driving order is shifted in order for each horizontal scanning period from “0461357” set in the left-eye rotation pattern register 154. .

  For this reason, in the third driving example, when the rotation patterns when the images are actually visible to the right eye and the left eye are put together, the right eye and the left eye can see eight patterns. Therefore, in addition to preventing crosstalk, the stripe pattern is sufficiently diffused without the rotation pattern being fixed between the right eye and the left eye.

  The patterns set in the right-eye rotation pattern register 152 and the left-eye rotation pattern register 154 are not limited to those described in FIG. In FIG. 23, the third driving example has been described as an example, but the same applies to the first driving example or the second driving example. Further, the second embodiment may be applied in the third embodiment.

  As described above, in the third embodiment, prior to changing the driving order, the right-eye driving order setting step for setting the driving order of the first horizontal scanning period of the right-eye image, and the first of the left-eye image. And a driving order setting step for the left eye for setting the driving order of the horizontal scanning period. For the right-eye image, in each vertical scanning period, the right-eye image data is converted into the right-eye image data by multiplex driving in which the driving order is shifted every horizontal scanning period from the driving order set in the right-eye driving order setting step. Based on this, a plurality of source lines are driven. For the left-eye image, in each vertical scanning period, the left-eye image data is converted into the left-eye image data by multiplex driving in which the driving order is shifted every horizontal scanning period from the driving order set in the left-eye driving order setting step. Based on this, a plurality of source lines are driven.

[Fourth Embodiment]
In the first embodiment, the VSYNC rotation counter 100 has been described as one 3-bit counter. However, the present invention is not limited to this. In the fourth embodiment, the VSYNC rotation counter 100 is provided separately for the right eye and the left eye. The fourth embodiment can be realized with substantially the same configuration as that of the first embodiment, and only differences from the first embodiment will be described below.

  FIG. 24 shows a configuration example of a multiplex control signal generation unit according to the fourth embodiment of the present invention. The multiplex control signal generator 37c in the fourth embodiment can be applied to the drive controller 36 instead of the multiplex control signal generator 37 of FIG. In FIG. 24, the same parts as those in FIG. 14 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The multiplex control signal generator 37 c includes a VSYNC rotation counter 100, an HSYNC rotation counter 110, and a multiplex counter 120. The multiplex control signal generator 37 c includes a multiplex drive timing generator 130, a multiplex decoder 140, a frequency divider 160, adders 162, 164, 168, and a selector 166. The VSYNC rotation counter 100 includes a right-eye VSYNC rotation counter (fourth counter) 102 and a left-eye VSYNC rotation counter (fifth counter) 104.

  The frequency dividing circuit 160 has a D-type flip-flop, the vertical synchronization signal VSYNC is input to the clock terminal C of the D-type flip-flop, and the data input terminal D is connected to the inverting output terminal XQ. An output signal from the output terminal Q of the D flip-flop is input to the right-eye VSYNC rotation counter 102 and the selector 166. The output signal of the inverting output terminal XQ of the D-type flip-flop is input to the left-eye VSYNC rotation counter 104.

  The right-eye VSYNC rotation counter 102 is a 3-bit counter that counts up based on the output signal of the output terminal Q of the D-type flip-flop. The left-eye VSYNC rotation counter 104 is a 3-bit counter that counts up based on the output signal of the inverting output terminal XQ of the D-type flip-flop. The adder 162 is a 3-bit adder that adds the count value of the right-eye VSYNC rotation counter 102 and the count value of the HSYNC rotation counter 110. The adder 164 is a 3-bit adder that adds the count value of the left-eye VSYNC rotation counter 104 and the count value of the HSYNC rotation counter 110. The selector 166 selectively outputs the addition result of the adder 162 or the addition result of the adder 164 based on the output signal of the inverting output terminal XQ of the D-type flip-flop. The adder 168 is a 3-bit adder that adds the output of the selector 166 and the count value of the multiplex counter 120, and outputs the addition result to the multiplex decoder 140.

  The multiplex decoder 140 generates multiplex control signals SEL <b> 0 to SEL <b> 7 using the count value of the right-eye VSYNC rotation counter 102 for the right-eye image according to the output of the frequency dividing circuit 160. Further, the multiplex decoder 140 generates multiplex control signals SEL0 to SEL7 using the count value of the left eye VSYNC rotation counter 104 for the left eye image in accordance with the output of the frequency dividing circuit 160. With the above configuration, the same multiplex control signals SEL0 to SEL7 as in the first embodiment can be generated.

  FIG. 25 is an explanatory diagram of a third driving example having the configuration of FIG. The VSYNC count value in FIG. 25 represents the count value of the vertical synchronization signal VSYNC with 3 bits.

  As shown in FIG. 25, when the rotation patterns when the images are actually seen in the right eye and the left eye in the third driving example are summarized, the right eye and the left eye can see eight patterns. Therefore, in addition to preventing crosstalk, the stripe pattern is sufficiently diffused without the rotation pattern being fixed between the right eye and the left eye. FIG. 25 illustrates a third driving example, and the same applies to the first driving example or the second driving example. Further, in the fourth embodiment, the second embodiment or the third embodiment may be applied.

  As described above, according to the fourth embodiment, the same effect as that of the first embodiment can be obtained.

[Fifth Embodiment]
In the first to fourth embodiments, in the third driving example, the start rotation pattern is fixed for each of the right-eye image and the left-eye image regardless of the driving mode, but this is limited to this. It is not a thing. In the fifth embodiment, the start rotation pattern is changed according to the drive mode for each of the right-eye image and the left-eye image. The fifth embodiment can be realized with a configuration substantially similar to that of the first embodiment, and only differences from the first embodiment will be described below.

FIG. 26 is an explanatory diagram of the drive mode in the fifth embodiment.
FIG. 27 shows an example of the timing of the drive mode in the fifth embodiment.
In the fifth embodiment, after the right-eye image is driven in three types of drive modes, the left-eye image is driven in three types of drive modes. Thereafter, the same driving is repeated. Here, each of the three types of drive modes is referred to as a first drive mode, a second drive mode, and a third drive mode. In the first drive mode and the second drive mode, the display frequency is 480 Hz, and the precharge of the source line is omitted before driving the source line, so that writing to the pixel is performed at a high display frequency drive. Time is secured (see FIG. 27). Note that precharge may be performed in the second drive mode. In the third drive mode, the display frequency is 240 Hz, and after the precharge, the source line is multiplexed (see FIG. 27). The shutter is opened during the second drive mode. The left-eye image is the same as the right-eye image.

  In the fifth embodiment, it is possible to set which of the first driving mode to the third driving mode as described above to change the start rotation pattern.

  FIG. 28 shows a configuration example of a multiplex control signal generation unit according to the fifth embodiment of the present invention. The multiplex control signal generation unit 37d in the fifth embodiment can be applied to the drive control unit 36 instead of the multiplex control signal generation unit 37 of FIG. In FIG. 28, the same parts as those in FIG. 14 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The multiplex control signal generation unit 37d includes a VSYNC rotation counter 100, an HSYNC rotation counter 110, and a multiplex counter 120. The multiplex control signal generator 37d includes a multiplex drive timing generator 130, a multiplex decoder 140, a frequency divider 142, and adders 132 and 134. Furthermore, the multiplex control signal generation unit 37 d includes a drive mode VSYNC selection register 180 and a VSYNC selection circuit (vertical synchronization signal selection circuit) 182.

  Setting information for specifying the output of the VSYNC selection circuit 182 is set by the display controller 70 in the drive mode VSYNC selection register 180. The VSYNC selection circuit 182 receives the vertical synchronization signal VSYNC and the drive mode signal, and outputs according to the setting information of the drive mode VSYNC selection register 180. The drive mode signal is a signal indicating which of the first drive mode to the third drive mode is the drive mode in the vertical scanning period. For example, when the setting information is “0000”, the VSYNC selection circuit 182 disables the output. For example, when the setting information is “0001”, the VSYNC selection circuit 182 outputs the vertical synchronization signal VSYNC when the first drive mode is indicated by the drive mode signal. The output of the VSYNC selection circuit 182 is input to the frequency dividing circuit 142.

  As a result, the vertical synchronization signal supplied to the frequency divider 142 and the VSYNC rotation counter 100 can be varied according to the drive mode. Therefore, the addition result of the adder 134 and its change timing can be varied to adjust the rotation pattern change timing.

〔Electronics〕
The drive device including the multiplex control signal generation unit or the liquid crystal display device having the drive device in any of the above embodiments can be applied to the following electronic apparatus. Hereinafter, an example in which the liquid crystal display device in any of the above embodiments is applied to a liquid crystal projector as an electronic apparatus will be described.

FIG. 29 shows an outline of the configuration of a projector system to which the liquid crystal display device according to any one of the above embodiments is applied. FIG. 29 shows an outline of the configuration of a projector system using liquid crystal shutter glasses.
FIG. 30 shows an outline of the configuration of the optical system shown in FIG. In FIG. 30, the projector of FIG. 29 is described as being configured by a so-called three-plate type liquid crystal projector, but is not limited thereto. In FIG. 30, the same parts as those in FIG. 29 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The projector system 200 includes a liquid crystal projector 210, liquid crystal shutter glasses 250, and a screen 260. The liquid crystal projector 210 includes a liquid crystal panel control unit 220, a timing generation unit 230, an infrared transmission unit 240, and an optical system 300.

  The optical system 300 includes a light source device 310, an image forming unit 320, and a projection optical system 340. The light source device 310 includes a light source 312, a pair of lens arrays 314, and a superimposing lens 316. The image forming unit 320 includes dichroic mirrors 322 and 324, reflection mirrors 326, 328, and 330, relay lenses 332 and 334, liquid crystal devices 336R and 336G and 336B as light modulation devices, and a cross dichroic prism 338. Each of the liquid crystal devices 336R, 336G, and 336B is a transmissive liquid crystal display device having a configuration similar to that of the liquid crystal display device 10 including the liquid crystal panel 12 of FIG. 1, and modulates incident light. The dichroic mirror 322 separates the light from the light source device 310 into red light (R) and light of other color components (green light (G) and blue light (B)). The red light separated by the dichroic mirror 322 is guided to the incident surface by the reflection mirror 326 to the liquid crystal device 336R. The green light and blue light separated by the dichroic mirror 322 are separated into green light and blue light by the dichroic mirror 324. The green light separated by the dichroic mirror 324 is incident on the incident surface of the liquid crystal device 336G. The blue light separated by the dichroic mirror 324 is guided to the incident surface of the liquid crystal device 336B by the reflection mirrors 328 and 330 via the relay lenses 332 and 334.

  The liquid crystal device 336R modulates red light. The liquid crystal device 336G modulates green light. The liquid crystal device 336B modulates blue light. Each color light modulated by the liquid crystal devices 336R, 336G, and 336B is combined by the cross dichroic prism 338.

  The projection optical system 340 enlarges the image formed by the light combined by the cross dichroic prism 338 and forms an image on the screen.

  The liquid crystal panel control unit 220 drives and controls the corresponding liquid crystal device for each color light of red light (R), green light (G), and blue light (B), and performs control for modulating each color light. The timing generation unit 230 generates liquid crystal shutter timing corresponding to the drive timing of the liquid crystal panel control unit 220. The infrared transmission unit 240 transmits the liquid crystal shutter timing generated by the timing generation unit 230 to the liquid crystal shutter glasses 250.

  The liquid crystal shutter glasses 250 include an infrared receiving unit 252, a liquid crystal shutter control unit 254, and a liquid crystal shutter unit 256. When the infrared receiver 252 receives the liquid crystal shutter timing transmitted by the infrared transmitter 240, the infrared receiver 252 notifies the liquid crystal shutter controller 254 of the timing. The liquid crystal shutter control unit 254 performs shutter control of the liquid crystal shutter unit 256 in synchronization with this timing.

  In such a projector system 200, in the liquid crystal projector 210, the liquid crystal devices 336R, 336G, and 336B are simultaneously driven based on image data corresponding to the image of each color component of the right-eye image. Thereafter, the liquid crystal devices 336R, 336G, and 336B are driven all at once based on image data corresponding to the image of each color component of the image for the left eye. That is, the liquid crystal projector 210 projects the right-eye image and the left-eye image on the screen 260 in a time division manner. In principle, the liquid crystal shutter glasses 250 synchronize with the liquid crystal projector 210 to control the shutter so that the left eye is shielded when the right eye image is displayed and the right eye is shielded when the left eye image is displayed. I do.

  According to the projector system 200 to which the liquid crystal display device in any of the above embodiments is applied, the stripe pattern is sufficiently diffused without fixing the rotation pattern of the right eye and the left eye, and a very high-definition 3D display is achieved. It becomes possible.

  As described above, the multiplex drive, the drive device, the electro-optical device, the electronic apparatus, and the like according to the present invention have been described based on any one of the above embodiments, but the present invention is limited to any one of the above embodiments. is not. For example, the present invention can be implemented in various modes without departing from the gist thereof, and the following modifications are possible.

  (1) In any of the above embodiments, the configuration of the liquid crystal display device 10 has been described by taking the configuration shown in FIG. 1 as an example, but the present invention is not limited to this. In any of the above-described embodiments, the configuration of the driving device 50 has been described by taking the configuration shown in FIG. 2 as an example, but the present invention is not limited to this. Furthermore, in any of the above-described embodiments, the multiplex control signal generation unit has been described by taking the configuration shown in FIG. 14, FIG. 20, FIG. 22, FIG. 24, or FIG. 28 as an example, but the present invention is not limited thereto. It is not something.

  (2) In any of the above embodiments, the case of applying the first drive example, the second drive example, and the third drive example has been described. However, the present invention is not limited to the content of the drive. Needless to say, the present invention can be applied to anything that performs multiplex driving.

  (3) In any of the above embodiments, it is needless to say that “right eye” can be replaced with “left eye” and “left eye” can be replaced with “right eye”.

  (4) In the above embodiment, the projector system has been described by taking a rear projection type system as an example, but the present invention is not limited to this. For example, the projector system according to the present invention may be a front projection type system.

  (5) The electronic apparatus to which the liquid crystal display device or the like in any of the above embodiments is applied is not limited to that shown in FIG. For example, mobile phones, personal computers, personal digital assistants (PDAs), digital still cameras, televisions, video cameras, car navigation devices, pagers, electronic notebooks, electronic paper, calculators, word processors, workstations, video phones, Examples include POS (Point of sale system) terminals, printers, scanners, copiers, video players, and devices equipped with touch panels.

  (6) In any of the above embodiments, the present invention has been described as a multiplex driving method, a driving device, an electro-optical device, an electronic apparatus, and the like, but the present invention is not limited to this. For example, the image display method in any of the above embodiments may be used.

10 ... Liquid crystal display device, 12 ... Liquid crystal panel, 20 ... Source driver,
22: shift register, 24, 26: line latch, 28: multiplexing circuit,
30 ... Reference voltage generation circuit, 32 ... DAC, 34 ... Source line drive circuit,
36: Drive control unit, 37, 37a, 37b, 37c, 37d, 80 ... Multiplex control signal generation unit, 38 ... Precharge voltage generation circuit, 40 ... Gate driver,
50 ... Drive device, 60 ... Power supply circuit, 70 ... Display controller,
80. Multiplex control signal generator,
100 ... VSYNC rotation counter (first counter),
102 ... VSYNC rotation counter for the right eye (fourth counter),
104 ... VSYNC rotation counter for the left eye (fifth counter),
110 ... HSYNC rotation counter (second counter),
120 ... multiplex counter (third counter),
130: Multiplex drive timing generator,
132, 134, 150, 158, 162, 164, 168 ... adders,
140: multiplex decoder, 142, 160 ... frequency divider,
143 ... Offset register, 144 ... Right eye offset register,
146 ... Left eye offset register, 148, 156, 166 ... Selector,
152 ... Rotation pattern register for right eye,
154 ... Left eye rotation pattern register,
180 ... Drive mode VSYNC selection register, 182 ... VSYNC selection circuit,
HSYNC horizontal synchronization signal, SEL0 to SEL7 ... multiplex control signal,
VSYNC ... Vertical synchronization signal

Claims (8)

Multiplex drive that drives each source line by dividing one source output into a plurality of source lines of the display panel based on the right-eye image data and the left-eye image data corresponding to the continuous right-eye image and left-eye image, respectively. A method,
A right-eye drive order setting step for setting the drive order of the first horizontal scanning period of the right-eye image;
A left-eye drive order setting step for setting the drive order of the first horizontal scanning period of the left-eye image in a driving order different from the driving order of the first horizontal scanning period of the right-eye image;
The drive order in the first horizontal scanning period of each of the right-eye image and the left-eye image set in each of the right-eye drive order setting step and the left-eye drive order setting step is 2 × n (n is (Natural number) driving order changing step for changing every vertical scanning period;
A right-eye drive step of driving the plurality of source lines based on the right-eye image data by multiplex drive corresponding to the drive order changed in the drive order change step;
A left eye driving step of driving the plurality of source lines based on the left eye image data by multiplex driving corresponding to the driving order changed in the driving order changing step,
In each of the right eye driving step and the left eye driving step,
In each vertical scanning period, the plurality of source lines are driven by changing the driving order in the immediately preceding horizontal scanning period every one horizontal scanning period in order from the driving order changed in the driving order changing step. Multiplex driving method. In claim 1,
The driving order of the first horizontal scanning period of the left-eye image set in the left-eye driving order setting step is based on the driving order of the first horizontal scanning period of the right- eye image set in the right-eye driving order setting step. A multiplex driving method, wherein the driving order is shifted to In claim 1 or 2 ,
A plurality of drive modes in which the presence or absence of precharge of the source line of the display panel or the display frequency of the display panel is different are prepared,
In each of the right eye driving step and the left eye driving step,
The right-eye image set in each of the right-eye drive order setting step and the left-eye drive order setting step , depending on which of the plurality of drive modes is the source line drive mode of the display panel. A multiplex driving method , wherein the driving order in the first horizontal scanning period of each of the left-eye images is changed. A driving device that drives each source line by dividing one source output into a plurality of source lines of a display panel based on right eye image data and left eye image data corresponding to successive right eye images and left eye images, respectively. There,
A first counter that updates a count value every 2 × n (n is a natural number) vertical scanning period;
A second counter that is initialized by a vertical synchronization signal and updates a count value every horizontal scanning period;
A third counter that is initialized by a horizontal synchronization signal and updates a count value corresponding to a multiplex drive timing within one horizontal scanning period;
A first pattern register in which a first pattern corresponding to the driving order of the first horizontal scanning period of the right-eye image is set;
A second pattern register in which a second pattern different from the first pattern corresponding to the driving order of the first horizontal scanning period of the left-eye image is set;
The count value of the first counter, the count value of the second counter, the count value of the third counter, the first pattern set in the first pattern register, and the second pattern A multiplex decoder that generates a multiplex control signal based on the second pattern set in the pattern register ;
On the basis of the multiplex control signals, viewed contains a source line driver for supplying to one of said plurality of source lines by the multiplex drive,
The driving order in the first horizontal scanning period of each of the right-eye image and the left-eye image set by each of the first pattern and the second pattern is based on the count value of the first counter. Is changed every 2 × n vertical scanning period,
The source line driver is
During each of multiplex driving for the right-eye image and multiplex driving for the left-eye image,
In each vertical scanning period, the driving order in the immediately preceding horizontal scanning period is changed every horizontal scanning period in order from the driving order changed every 2 × n vertical scanning periods based on the count value of the first counter. And driving the plurality of source lines . In claim 4 ,
A plurality of drive modes in which the presence or absence of precharge of the source line of the display panel or the display frequency of the display panel is different are prepared,
A driving apparatus comprising: a vertical synchronizing signal selection circuit that varies a vertical synchronizing signal supplied to the first counter depending on which of the plurality of driving modes is selected. In claim 4 or 5 ,
The first counter is
A fourth counter that updates the count value every vertical scanning period in the right-eye image;
A fifth counter that updates the count value every vertical scanning period in the image for the left eye,
The multiplex decoder is
For the right-eye image, the multiplex control signal is generated using the count value of the fourth counter,
The drive device that generates the multiplex control signal for the left-eye image using a count value of the fifth counter. The display panel;
An electro-optical device comprising: the driving device according to claim 4 that drives a source line of the display panel. An electronic apparatus comprising the drive device according to claim 4 .

Images