JP5157231B2 - Display device and electronic device - Google Patents

Description

  The present invention relates to a technique for allowing an observer to perceive a stereoscopic effect of an image.

When one of two types of images having parallax with each other (hereinafter referred to as “image for left eye”) is visually recognized by the left eye and the other (hereinafter referred to as “image for right eye”) is visually recognized by the right eye, the viewer can see the stereoscopic effect of the image. Can be perceived. Various methods have been conventionally proposed for causing a left eye image and a right eye image to be individually perceived by the left eye and right eye of an observer. For example, Patent Document 1 discloses a configuration in which a parallax barrier is disposed on the front side of a display device.
JP 2003-259395 A

  However, in the configuration using the parallax barrier, all the pixels of the display device are divided into pixels that display the left-eye image and pixels that display the right-eye image. There is a problem that the resolution is reduced. In view of the above circumstances, an object of the present invention is to solve the problem of displaying a plurality of stereoscopic images (right-eye image and left-eye image) with high resolution.

In order to solve the above problems, in the display device according to the present invention, a plurality of unit display regions including a plurality of pixels are arranged in a first direction and a second direction intersecting the first direction, and the unit display Display means for varying the transmittance of the plurality of pixels included in the region, and monochromatic light of a plurality of colors can be emitted, and the monochromatic light of the plurality of colors corresponding to the unit display region of the display means An illumination device that selectively emits monochromatic light of a predetermined color, and an optical device that is disposed between the display unit and the illumination device and that advances the monochromatic light emitted by the illumination device in a predetermined direction A liquid crystal shutter disposed between the optical body and the illuminating device and switching the traveling direction of the monochromatic light in the optical body, and the plurality of unit display areas are selected by the display means. A plurality of the unit display areas Display driving means for controlling the transmittance of the plurality of pixels included in each, illumination driving means for selecting the color of the monochromatic light emitted from the illumination device, and the traveling direction of the monochromatic light in the liquid crystal shutter anda direction switching means for controlling the switching of the one frame constituting one stereo image includes a plurality of subfields, in each of the plurality of sub-fields, each one or more of the unit table display region a monochromatic image of the first image or the second image is displayed with a parallax to each other, the color of the monochromatic light emitted, the traveling direction of the single color light, one of said plurality of mutually different It is characterized by the sequential display of subfields.
Further, in the display device according to the present invention, the display of one frame constituting the one stereoscopic image may be performed by the plurality of colors corresponding to the monochromatic lights of a plurality of colors whose traveling directions are the first predetermined directions. After the subfields are sequentially displayed, the plurality of subfields corresponding to the monochromatic lights of a plurality of colors whose traveling direction is the second predetermined direction are sequentially displayed.
In the display device according to the present invention, the display of one frame constituting the one stereoscopic image includes the first subfield of the monochromatic light whose traveling direction is the first predetermined direction, and the traveling direction. The subfields of the first monochromatic light whose direction is the second predetermined direction are alternately and sequentially displayed.
In the display device according to the present invention, one subfield has a plurality of display periods in which a plurality of unit display areas different from each other are selected. In this case, the plurality of different unit display areas selected for each display period are the unit display areas arranged without being adjacent to each other in the first direction and the second direction. Features.

  According to the above configuration, each single-color image of the first image and each single-color image of the second image are sequentially displayed in a time-division manner, so that compared to a configuration in which a parallax barrier is disposed on the front surface of the liquid crystal device. It is possible to increase the resolution of the image perceived by the observer. In addition, since the monochrome images of the first image and the second image are sequentially displayed for each of one or more unit display areas, color breakup when the viewpoint of the observer moves across the unit display areas is suppressed. There is also an advantage of being.

  In the first aspect of the display device according to the present invention, the driving means sequentially displays a single color image of a plurality of color components constituting the first image within the first period (for example, within the period FR in FIG. 3). The single-color images of a plurality of color components constituting the second image are sequentially displayed in a second period (for example, in the period FL in FIG. 3) different from the first period. In the second aspect, the drive unit alternately displays a single color image of a plurality of color components constituting the first image and a single color image of a plurality of color components constituting the second image within a unit period. According to the second aspect, each single-color image of the first image and each single-color image of the second image are alternately displayed. Therefore, compared with the display device according to the first aspect, the observer can flicker. There is an advantage that it is difficult to perceive.

  In a preferred aspect of the display device according to the present invention, the display means selectively selects each monochromatic light of the plurality of color components in a first direction and a second direction different from the first direction for each unit display area. And a display unit that controls the transmittance of the light emitted from the illumination device for each pixel, and the driving unit applies the color component to the color component during a period of displaying a single color image of each color component of the first image. Corresponding monochromatic light is emitted from the illumination device in the first direction for each unit display area, and the monochromatic light corresponding to the color component is displayed from the illumination apparatus for each unit display area in a period in which the monochromatic image of each color component of the second image is displayed. Illumination driving means for emitting light in the second direction, and display driving for controlling the transmittance of each pixel of the display body according to the gradation of the single color image of the plurality of color components constituting each of the first image and the second image Means. According to the above aspect, since each monochromatic light for displaying the first image and each monochromatic light for displaying the second image are emitted in different directions, stereoscopic viewing with the naked eye is possible.

  A display device according to a preferred aspect of the present invention provides a mixed color of a white component and two kinds of primary color components from an input image signal that specifies gradations of a plurality of primary color components for each pixel for each of a first image and a second image. Image processing means for generating a separated image signal for designating gradation for a plurality of color components including at least one of the components, and the driving means includes a plurality of color components constituting each of the first image and the second image Are displayed sequentially for each of one or more unit display areas based on the separated image signal. According to the above aspect, since monochrome images of color components other than the primary color components (mixed color component and white color component) are displayed, it is possible to suppress color breakup compared to a configuration that displays only the primary color component monochrome images. Is possible.

  The present invention is also specified as a method of driving a display device. A driving method according to the present invention is a method for driving a display device in which a plurality of unit display areas for displaying images having parallax with each other so as to be stereoscopically viewed are arranged, and includes a first image and a first image having parallax with each other. A single color image of a plurality of color components constituting each of the two images is sequentially displayed for each of one or more unit display areas among the plurality of unit display areas. The same effect as the display device of the present invention can be obtained by the above driving method.

<A: First Embodiment>
FIG. 1 is a block diagram showing a configuration of a display device according to the first embodiment of the present invention. As shown in the figure, the display device 100 includes a lighting device 10, a liquid crystal device 20, and a driving device 50. The illumination device 10 is installed on the back side of the liquid crystal device 20 to illuminate the display device 100. In FIG. 1, the lighting device 10 and the liquid crystal device 20 are illustrated as being separated from each other for convenience, but the lighting device 10 and the liquid crystal device 20 are actually arranged close to each other.

  The liquid crystal device 20 includes a first substrate 21 and a second substrate 22 that face each other. Liquid crystal (not shown) is sealed in the gap between the first substrate 21 and the second substrate 22. A liquid crystal that responds at high speed such as an OCB (Optically Compensated Bend) mode is preferably used. On the surface of the second substrate 22 facing the liquid crystal, a plurality of pixel electrodes 24 corresponding to each pixel of the image are arranged in a matrix over the X and Y directions intersecting each other. The orientation of the liquid crystal sandwiched between the first substrate 21 and the second substrate 22 changes according to the potential difference between each pixel electrode 24 and the counter electrode (not shown) on the surface of the first substrate 21. Therefore, the ratio (transmittance) of the amount of light transmitted to the observation side in the emitted light from the illumination device 10 is controlled for each pixel electrode 24. A colored layer (color filter) is not formed in the liquid crystal device 20.

  As shown in FIG. 1, a rectangular display region (region in which the pixel electrodes 24 are arranged) 25 in which an image is actually displayed in the liquid crystal device 20 is composed of two regions G (G1, G2) adjacent in the Y direction. ). The region G1 is divided into three unit display regions A1 (A1a, A1b, A1c) arranged along the X direction. Similarly, the region G2 is divided into three unit display regions A2 (A2a, A2b, A2c) arranged along the X direction. That is, in the display area 25, six unit display areas A (A1a, A1b, A1c, A2a, A2b, A2c) are arranged in the X direction and the Y direction. Each unit display area A is a rectangular area having a common size. In each unit display area A, a plurality of pixel electrodes 24 are arranged in a matrix along the X direction and the Y direction.

  The illumination device 10 includes six illumination units B (B1a, B1b, B1c, B2a, B2b, B2c) each corresponding to a separate unit display area A, a liquid crystal shutter 16, and an optical body 18. In FIG. 1, each illumination unit B, the liquid crystal shutter 16, and the optical body 18 are illustrated apart from each other for convenience, but are actually arranged close to each other.

  As shown in FIG. 1, each illumination unit B and the unit display region A corresponding to the illumination unit B overlap with each other when viewed from the direction perpendicular to the display region 25 (XY plane). For example, the illumination part B1a overlaps with the unit display area A1a, and the illumination part B1b overlaps with the unit display area A1b. Therefore, the six illumination parts B are arranged in a matrix along the X direction and the Y direction as shown in FIG.

  FIG. 2 is an enlarged side view of one illumination part B of the illumination device 10. As shown in FIGS. 1 and 2, each illumination unit B includes a light source 12 and a light guide 14. The light guide 14 is a rectangular plate material facing the second substrate 22 of the liquid crystal device 20. The light source 12 is disposed so as to face the back surface of the light guide 14 and illuminates the back surface. As shown in FIGS. 1 and 2, the light source 12 includes three light emitters 13 (13r, 13g, 13b) that emit monochromatic light corresponding to each of the three primary color components. The light emitter 13r emits monochromatic light (red light) having a wavelength corresponding to red. Similarly, the light emitter 13g emits green light, and the light emitter 13b emits blue light. The light guide 14 emits incident light from the light source 12 from the entire surface on the liquid crystal device 20 side. In practice, a reflecting plate or a scattering plate is attached to the light guide 14, but is omitted in FIG. 1 for convenience.

  The liquid crystal shutter 16 is inserted in a gap between the liquid crystal device 20 and each illumination unit B (light guide 14). The liquid crystal shutter 16 is configured by sealing liquid crystal between opposing substrates, and the transmittance of the liquid crystal is individually controlled by the plurality of regions AR and the plurality of regions AL. As shown in FIG. 2, each area AR and each area AL extends in the Y direction and is alternately arranged along the X direction. Light emitted from each light guide 14 passes through each area AR or each area AL and is emitted to the liquid crystal device 20 side.

  The optical body 18 is inserted in the gap between the liquid crystal device 20 and the liquid crystal shutter 16. As shown in FIGS. 1 and 2, the optical body 18 is a light transmissive member in which a plurality of lenticular lenses 182 extending in the Y direction are arranged in the X direction. When viewed from the direction perpendicular to the display area 25, one lenticular lens 182 overlaps the area AR and the area AL adjacent to each other in the X direction in the liquid crystal shutter 16. As shown in FIG. 2, each lenticular lens 182 advances the light emitted from the area AR in the direction DR and advances the light emitted from the area AL in the direction DL. The outgoing light in the direction DR passes through the liquid crystal device 20 and reaches the right eye of the observer. The outgoing light in the direction DL reaches the left eye of the observer after passing through the liquid crystal device 20.

  As shown in FIG. 1, an input image signal SIN is supplied to the driving device 50 from an external device (not shown). The input image signal SIN is a signal that designates the display color of each pixel for each of the right-eye image and the left-eye image that have parallax. The input image signal SIN of this embodiment designates the gradation for each of the three primary color components (red, green, and blue) that constitute the display color of the pixel. That is, the input image signal SIN includes a gradation GR_r of a red component (hereinafter referred to as “R component”), a gradation GR_g of a green component (hereinafter referred to as “G component”), and a blue component (hereinafter referred to as “B component”). For each pixel, and for the left-eye image, an R component gradation GL_r, a G component gradation GL_g, and a B component gradation GL_b are specified for each pixel.

  The driving device 50 is a circuit that drives the illumination device 10 and the liquid crystal device 20 based on the input image signal SIN. The drive device 50 includes an illumination drive circuit 52 that drives the illumination device 10 and a liquid crystal drive circuit 54 that drives the liquid crystal device 20. In addition, the aspect of mounting the driving device 50 is arbitrary. For example, a configuration in which the illumination drive circuit 52 is mounted on the illumination device 10 and the liquid crystal drive circuit 54 is mounted on the liquid crystal device 20 or a configuration in which the illumination drive circuit 52 and the liquid crystal drive circuit 54 are mounted on a single integrated circuit is adopted. Is done.

  FIG. 3 is a timing chart for explaining the operation of the display device 100. Note that the symbol R in FIG. 3 means a right-eye image, and L means a left-eye image. The symbol r means the R component, the symbol g means the G component, and the symbol b means the B component. Therefore, for example, the symbol “R-r” in FIG. 3 means a monochromatic image of the R component of the right-eye image.

  A unit period F in FIG. 3 is a period (frame) used for displaying one image stereoscopically viewed by the observer. As shown in FIG. 3, one unit period F is divided into a period FR for displaying a right-eye image and a period FL for displaying a left-eye image. Each of the period FR and the period FL is composed of three subfields SF (SF1 to SF3) corresponding to different primary color components. Each subfield SF includes a writing period PW and three display periods P1 to P3. A single color image of each primary color component constituting the right eye image is sequentially displayed for each unit display area A in the subfields SF1 to SF3 of the period FR, and a single color image of each primary color component constituting the left eye image is displayed in the period FL. The driving device 50 drives the illuminating device 10 and the liquid crystal device 20 so as to sequentially display each unit display area A in the subfields SF1 to SF3. The details are as follows.

  The liquid crystal driving circuit 54 determines the potential of each pixel electrode 24 of the liquid crystal device 20 for the primary color component in the writing period PW of the subfield SF in which the primary color component of the left-eye image or right-eye image is to be displayed. It is set to a potential (hereinafter referred to as “data potential”) corresponding to the gradation specified by the input image signal SIN. More specifically, the liquid crystal driving circuit 54 determines the gradation specified by the input image signal SIN as the R component of each pixel of the right-eye image in the writing period PW in the subfield SF1 corresponding to the R component in the period FR. A data potential corresponding to GR_r is supplied to each pixel electrode 24 (R-r writing). Similarly, in the writing period PW of the subfield SF2 corresponding to the G component in the period FR, the data potential corresponding to the gradation GR_g is supplied to each pixel electrode 24 (R-g writing) and corresponds to the B component. In the writing period PW of the subfield SF3, the data potential corresponding to the gradation GR_b is supplied to each pixel electrode 24 (R_b writing). In each writing period PW of the subfields SF1 to SF3 in the period FL, the data potential corresponding to the gradation (GL_r, GL_g, GL_b) of each pixel of the left-eye image is supplied to each pixel electrode 24 in the same procedure. The The transmittance of the liquid crystal of the liquid crystal device 20 in the immediately subsequent display periods P1 to P3 is set according to the data potential set in the pixel electrode 24 in the writing period PW.

  As shown in FIG. 1, the illumination driving circuit 52 includes a light source driving unit 522 that controls each light source 12 and a direction switching unit 524 that controls the liquid crystal shutter 16. The light source drive unit 522 selectively causes each of the plurality of light emitters 13 (13r, 13g, 13b) to emit light for each illumination unit B. More specifically, in the subfield SF where a single color image of each primary color component is to be displayed in each of the period FR and the period FL, the light source driving unit 522 is in the three illumination units B1a, B1b and B1c in the region G1. The light-emitting body 13 (three light-emitting bodies 13 of the same color) of the primary color component emits light sequentially in the display periods P1 to P3, and the primary color component of the three illumination parts B2a, B2b and B2c in the region G2 The light emitter 13 is caused to emit light sequentially in the display periods P1 to P3. The illumination part B1 in which the light emitter 13 emits light in the area G1 in one display period P and the illumination part B2 in which the light emitter 13 emits light in the area G2 in the display period P are not adjacent in the Y direction. .

  For example, when attention is paid to three illumination parts B1 (B1a, B1b, B1c) in the region G1, as shown in FIG. 3, the light emitter 13r of the illumination part B1a emits light in the display period P1 in the subfield SF1 of the period FR. In the display period P2, the light emitter 13r of the illumination unit B1b emits light, and in the display period P3, the light emitter 13r of the illumination unit B1c emits light (B1a → B1b → B1c). On the other hand, for the three illumination parts B2 (B2a, B2b, B2c) in the region G2, the light emitter 13r of the illumination part B2b emits light during the display period P1 of the subfield SF1 of the period FR, and the illumination part during the display period P2. The light emitter 13r of B2c emits light, and the light emitter 13r of the illumination unit B2a emits light during the display period P3 (B2b → B2c → B2a). In the subfield SF2, the same operation is executed for the green light emitter 13g of each illumination unit B, and in the subfield SF3, the same operation is executed for the blue light emitter 13b. In the period FL, the light emitters 13 of the respective illumination units B are driven in the same order.

  The direction switching unit 524 in FIG. 1 advances the emitted light from the illumination device 10 in either the direction DR or the direction DL by individually controlling the transmittance of the liquid crystal shutter 16 in each area AR and each area AL. Means. More specifically, as shown in FIG. 3, the direction switching unit 524 displays each area AR in the display periods P1 to P3 of the subfields SF1 to SF3 in the period FR in which the monochromatic image for the right eye is to be displayed. Is increased (ON) and the transmittance of each area AL is decreased (OFF), and the display periods P1 to P3 of the subfields SF1 to SF3 in the period FL in which the monochromatic image of the left eye image is to be displayed are displayed. Increases the transmittance of each area AL and decreases the transmittance of each area AR.

  Since the driving device 50 operates as described above, in the display periods P1 to P3 in each of the subfields SF1 to SF3 of the period FR, the right eye is displayed for every two unit display areas A that are not adjacent in the X direction and the Y direction. A single color image of each primary color component of the image for use is sequentially output in the direction DR. For example, as shown in FIG. 3, in the subfield SF1 of the period FR, the R component monochrome image of the right-eye image is displayed in the unit display areas A1a and A2b in the display period P1, and the unit is displayed in the display period P2. Displayed in the display areas A1b and A2c, and displayed in the unit display areas A1c and A2a in the display period P3. Similarly, in the subfield SF2 of the period FR, the G component monochrome image of the right eye image is sequentially displayed in each unit display area A, and in the subfield SF3, the B component monochrome image of the right eye image is displayed in each unit display area A. Are displayed in sequence. Accordingly, in the period FR, single-color images of the three primary color components of the right-eye image are displayed in one unit display area A. In addition, in the display periods P1 to P3 in each of the subfields SF1 to SF3 of the period FL, the single-color images of the primary color components of the left-eye image are not adjacent to each other in the X direction and the Y direction as in the period FR. Each unit display area A is sequentially output in the direction DL.

  The observer perceives the right-eye image of the color by visually recognizing each monochromatic image of the right-eye image output in the direction DR in the subfields SF1 to SF3 in the period FR sequentially with the right eye, and within the period FL. A color left-eye image is perceived by sequentially viewing each monochromatic image of the left-eye image output in the direction DL in the subfields SF1 to SF3 with the left eye. Therefore, the observer perceives a color image with a stereoscopic effect for each unit period F.

  As described above, in the present embodiment, each of the right-eye image and the left-eye image is displayed in a time-sharing manner using all the pixels of the liquid crystal device 20, so that a parallax barrier is provided on the front side of the liquid crystal device 20. The resolution of the image perceived by the observer can be increased compared to the installation configuration (configuration in which the image for the right eye and the image for the left eye are simultaneously displayed on the liquid crystal device 20). Further, since the color image is displayed by the frame sequential method, the liquid crystal device 20 does not need to display the three primary color components simultaneously (that is, it is not necessary to divide the pixel into three). Therefore, the effect that an image with a high resolution is displayed becomes particularly remarkable.

  In addition, since the single-color images of the right-eye image and the left-eye image are sequentially displayed in each unit display area A within the subfield SF, color breakup due to movement of the observer's viewpoint can be effectively suppressed. For example, when the observer's viewpoint moves to the left during the display period P in which the monochrome image is displayed in the unit display area A1b, the display of the monochrome image in the destination unit display area A1a has already ended. The color breakup caused by the movement of the viewpoint is not perceived by the observer. Similarly, when the observer's viewpoint moves downward within the display period P in which the single color image is displayed in the unit display area A1b, the display of the single color image in the unit display area A2b of the movement destination has already ended. Color breakup caused by viewpoint movement is not perceived.

<B: Second Embodiment>
Next, a second embodiment of the present invention will be described.
In the first embodiment, the single-color images of the right-eye image are sequentially displayed in the period FR that is continuous within the unit period F, and the single-color images of the left-eye image are displayed in the period FL that is continuous within the unit period F. A configuration for sequentially displaying was illustrated. On the other hand, in this embodiment, each single-color image of the right-eye image and each single-color image of the left-eye image are alternately displayed in each subfield SF within the unit period F. In addition, about each element which an effect | action and a function are equivalent to 1st Embodiment in each form illustrated below, the same code | symbol as above is attached | subjected and each detailed description is abbreviate | omitted suitably.

  FIG. 4 is a timing chart for explaining the operation of the display device 100. As shown in the figure, each unit period F is divided into six subfields SF1 to SF6. In the display periods P1 to P3 of the odd-numbered subfield SF (SF1, SF3, SF5), the single-color images of the primary color components of the right-eye image are sequentially displayed for each unit display area A, and the even-numbered subfield SF ( In the display periods P1 to P3 of SF2, SF4, and SF6), the single-color images of the primary color components of the left-eye image are sequentially displayed for each unit display area A. Further details are as follows.

  The liquid crystal driving circuit 54 supplies a data potential corresponding to the gradation (GR_r, GR_g, GR_b) of each primary color component of the right-eye image to each pixel electrode 24 in the writing period PW of each odd-numbered subfield SF. In the writing period PW of each even-numbered subfield SF, a data potential corresponding to the gradation (GL_r, GL_g, GL_b) of each primary color component of the image for the left eye is supplied to each pixel electrode 24.

  In the display periods P1 to P3 of the subfields SF1 and SF2 corresponding to the R component, the light source driving unit 522 includes the light emitters 13r of each illumination unit B in the region G1 and the light emitters 13r of each illumination unit B in the region G2. In sequence. Similarly, the light source driving unit 522 sequentially emits the light emitters 13g in the region G1 and the light emitters 13g in the region G2 in the display periods P1 to P3 of the subfields SF3 and SF4 corresponding to the G component, In the display periods P1 to P3 of the subfields SF5 and SF6 corresponding to the B component, the light emitters 13b in the region G1 and the light emitters 13b in the region G2 are caused to emit light sequentially. As in the first embodiment, the illumination unit B1 emitting the light emitter 13 in the region G1 and the illumination unit B2 emitting the light emitter 13 in the region G2 are not adjacent in the Y direction.

  The direction switching unit 524 increases the transmittance of each area AR and decreases the transmittance of each area AL in the display periods P1 to P3 of the odd-numbered subfields SF, and displays the display periods of the even-numbered subfields SF. In P1 to P3, the transmittance of each area AL is increased and the transmittance of each area AR is decreased.

  Since the driving device 50 of the present embodiment operates as described above, in the display periods P1 to P3 of the odd-numbered subfields SF, a single-color image (for each primary color component of the right-eye image) for each of the two unit display areas A ( R-r, R-g, and R-b) are sequentially output in the direction DR. In the display periods P1 to P3 of each even-numbered subfield SF, each of the left-eye images is displayed for every two unit display areas A. Monochromatic images (Lr, Lg, Lb) of primary color components are sequentially output in the direction DL. Therefore, the same effects as those of the first embodiment can be obtained in this embodiment.

  By the way, in the configuration in which the monochromatic images of the right-eye image and the left-eye image are displayed in a time-division manner as in each of the above embodiments, the light emitted from the liquid crystal device 20 is intermittently applied to each of the observer's right eye and left eye. To reach. That is, the image does not reach the left eye of the observer when displaying each monochrome image of the right eye image, and the image does not reach the right eye of the observer when displaying each monochrome image of the left eye image. In the configuration in which the monochromatic image for the right eye image and the monochromatic image for the left eye image are alternately displayed for each subfield SF as in the present embodiment, a plurality of monochromatic images for the right eye image are continuous in the period FR. Compared with the first embodiment in which a plurality of single-color images of the left-eye image are continuous in the period FL, the period in which the emitted light from the liquid crystal device 20 reaches one eye of the observer is shortened. Therefore, according to the present embodiment, there is an advantage that it is difficult for an observer to perceive periodic brightness fluctuation (flicker) of the liquid crystal device 20.

<C: Third Embodiment>
Next, a third embodiment of the present invention will be described.
In the first embodiment and the second embodiment, the configuration in which single-color images of three kinds of primary color components are displayed for each of the right-eye image and the left-eye image is exemplified. In this embodiment, single-color images of a plurality of color components extracted from the display color specified by the input image signal SIN are displayed for the right-eye image and the left-eye image.

  FIG. 5 is a block diagram illustrating a configuration of the display device 100. As shown in the figure, the display device 100 of the present embodiment includes an image processing device 40 in addition to the elements of the first embodiment. The image processing device 40 generates and outputs a separated image signal S from the input image signal SIN. The separated image signal S is a signal that designates the gradation of each component when the display color designated by the input image signal SIN is separated into a plurality of color components for each pixel of the right-eye image and the left-eye image. The separated image signal S of this embodiment includes a cyan (C) component, a yellow (Y) component, a magenta (M) component, and a white component in addition to the gradations of the three primary color components similar to those in the first embodiment. The (W) component is designated for the right-eye image and the left-eye image.

  Part (a) of FIG. 6 shows a specific example of the gradation (GR_r, GR_g, GR_b) of each primary color component that the input image signal SIN designates for one pixel of the right-eye image. The image processing apparatus 40 sets the minimum value Gmin of the gradations (GR_r, GR_g, GR_b) of the three kinds of primary color components specified for one pixel by the input image signal SIN as the gradation GR_w of the white component. Further, the image processing apparatus 40 separates the G component and the B component remaining after the extraction of the white component into the mixed color (C component) and the B component as shown in the part (b) of FIG. The gradation (GR_c, GR_b) is designated by the separated image signal S. If the R component and the G component remain after extraction of the white component, the gradation of the Y component is specified by the separated image signal S. If the B component and the R component remain, the M component level is determined. The tone is specified by the separated image signal S. Moreover, although the image for right eyes was illustrated in FIG. 6, it processes similarly about the image for left eyes.

  The driving device 50 controls the illumination device 10 and the liquid crystal device 20 based on the separated image signal S. That is, each monochrome image of the seven types of color components (white component, three types of primary color components, and three types of mixed color components) of the right-eye image in seven subfields SF1 to SF7 into which the period FR of the unit period F is divided. Are sequentially output in the direction DR for each unit display area A, and the single color images of the seven types of color components of the left-eye image are sequentially displayed for each unit display area A in the seven subfields SF1 to SF7 of the period FL. The driving device 50 controls the lighting device 10 and the liquid crystal device 20 so as to be output in the direction DL.

  In this embodiment, the same effect as that of the first embodiment is obtained. Further, in the present embodiment, since the monochromatic image of the white component and the mixed color component is sequentially displayed in addition to the primary color component, the color breakup is performed as compared with the configuration of the first embodiment in which only the monochromatic image of the primary color component is displayed. Can be suppressed. Note that the configuration of this embodiment that displays a monochromatic image of a mixed color component or a white component extracted from the input image signal SIN may be adopted in the second embodiment. For example, a single-color image of a plurality of color components (white component, three kinds of primary color components and three kinds of mixed color components) constituting the right-eye image and a single-color image of a plurality of color components constituting the left-eye image are subfield SF. A configuration of alternately displaying each is employed.

<D: Modification>
Various modifications can be made to each of the above embodiments. An example of a specific modification is as follows. Two or more aspects may be arbitrarily selected from the following examples and combined.

(1) Modification 1
In each of the above embodiments, the configuration in which the light emitted from the light source 12 is selectively advanced in either the direction DR or the direction DL is illustrated. However, the right eye image and the left eye image are respectively represented by the observer's right eye and left eye. A known technique can be arbitrarily employed as a method for causing the individual to perceive individually. For example, a method for causing an observer to wear a spectacle-type instrument whose transmittance is individually controlled by a portion covering the right eye (hereinafter referred to as “right eye portion”) and a portion covering the left eye (hereinafter referred to as “left eye portion”). Is also adopted. That is, during the period in which the right-eye image is displayed, the transmittance of the right eye part is increased and the left eye part is shielded. In the period in which the left eye image is displayed, the transmittance of the left eye part is increased and the right eye part is shielded. According to the above configuration, since the liquid crystal shutter 16 and the optical body 18 are not necessary, the configuration of the illumination device 10 can be simplified. As exemplified above, the display device 100 according to a preferred aspect of the present invention is sufficient as long as it is a device that displays each image having parallax so as to be stereoscopically visible, and is a specific example for realizing stereoscopic vision. The configuration is not a problem in the present invention.

(2) Modification 2
In each of the above embodiments, the configuration in which the single color image is displayed in the two unit display areas A in each of the display periods P1 to P3 is exemplified. However, the unit display area A in which the single color images are displayed in parallel (simultaneously). The number of is arbitrary. For example, a configuration in which a single color image is displayed for each unit display region A and a configuration in which a single color image is displayed for each of three or more unit display regions are also employed.

(3) Modification 3
In each of the above embodiments, the configuration in which the light emitted from the illumination device 10 selectively proceeds in two directions of the direction DR and the direction DL is exemplified. However, the configuration in which the light emitted from the illumination device 10 is emitted in three or more directions is also possible. Adopted. That is, the display device 100 according to each of the above embodiments is also used for displaying a stereoscopic image with a plurality of parallaxes.

(4) Modification 4
The order of the display colors of the single-color images of the right-eye image and the left-eye image is arbitrarily changed. For example, in the second embodiment, the R component (R−r) of the right eye image → the G component (L−g) of the left eye image → the B component (R−b) of the right eye image → the R of the left eye image. A monochromatic image may be displayed for each unit display area A in the order of component (L-r) → G component (R-g) of the right-eye image → B component (L-b) of the left-eye image. A configuration in which the order of the display colors of the monochromatic images is changed every unit period F is also suitable.

(5) Modification 5
In each of the above embodiments, the configuration in which the liquid crystal shutter 16 and the optical body 18 are continuous over all the illumination parts B is exemplified. However, the liquid crystal shutter 16 and the optical body 18 are divided into one or a plurality of illumination parts B, The structure divided | segmented for every area | region G is also employ | adopted. However, according to the configuration in which the liquid crystal shutter 16 and the optical body 18 are continuous over the plurality of illumination units B, there is an advantage that the number of parts of the illumination device 10 is reduced.

<E: Application example>
Next, an electronic apparatus using the display device according to the present invention will be described. 7 to 9 show forms of electronic devices that employ the display device 100 according to any of the forms described above.

  FIG. 7 is a perspective view illustrating a configuration of a mobile personal computer that employs the display device 100. The personal computer 2000 includes a display device 100 that displays various images, and a main body 2010 on which a power switch 2001 and a keyboard 2002 are installed.

  FIG. 8 is a perspective view illustrating a configuration of a mobile phone to which the display device 100 is applied. A cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and a display device 100 that displays various images. By operating the scroll button 3002, the screen displayed on the display device 100 is scrolled.

  FIG. 9 is a perspective view illustrating a configuration of a personal digital assistant (PDA) to which the display device 100 is applied. The portable information terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and the display device 100 that displays various images. When the power switch 4002 is operated, various information such as an address book and a schedule book are displayed on the display device 100.

  The electronic apparatus to which the display device according to the present invention is applied includes the digital still camera, the television, the video camera, the car navigation apparatus, the pager, the electronic notebook, the electronic paper, in addition to the apparatuses illustrated in FIGS. Examples include calculators, word processors, workstations, videophones, POS terminals, printers, scanners, copiers, video players, devices equipped with touch panels, and the like.

It is a block diagram which shows the structure of the display apparatus which concerns on 1st Embodiment of this invention. It is a side view which shows the structure of a display apparatus. It is a timing chart which shows operation | movement of a display apparatus. It is a timing chart which shows operation | movement of the display apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the display apparatus which concerns on 3rd Embodiment of this invention. It is a conceptual diagram for demonstrating the operation | movement which produces | generates a separated image signal. It is a perspective view which shows the form (personal computer) of the electronic device which concerns on this invention. It is a perspective view which shows the form (cellular phone) of the electronic device which concerns on this invention. It is a perspective view which shows the form (mobile information terminal) of the electronic device which concerns on this invention.

Explanation of symbols

100: Display device, 10: Illumination device, B (B1a, B1b, B1c, B2a, B2b, B2c) ... Illumination unit, 12: Light source, 13 (13r, 13g, 13b) ... Luminescent body, 14 ...... Light guide, 16 ... liquid crystal shutter, 18 ... optical body, 20 ... liquid crystal device, 21 ... first substrate, 22 ... second substrate, 24 ... pixel electrode, 25 ... display area, A (A1a, A1b, A1c, A2a, A2b, A2c) ... Unit display area, 40 ... Image processing device, 50 ... Drive device, 52 ... Illumination drive circuit, 522 ... Light source drive unit, 524 ... Direction switching unit, 54... Liquid crystal drive circuit, F... Unit period, SF (SF1, SF2,...).

Claims (6)

A plurality of unit display areas including a plurality of pixels arranged in a first direction and a second direction intersecting the first direction, and display means for making the transmittances of the plurality of pixels included in the unit display area different from each other ,
A lighting device capable of emitting single color light of a plurality of colors and selectively emitting single color light of a predetermined color among the single color light of the plurality of colors corresponding to the unit display area of the display unit;
An optical body that is disposed between the display means and the illumination device and travels in a predetermined direction the light of monochromatic light emitted by the illumination device;
A liquid crystal shutter that is arranged between the optical body and the illumination device and switches a traveling direction of the monochromatic light in the optical body;
Display driving means for selecting a plurality of unit display areas in the display means and controlling the transmittance of the plurality of pixels included in each of the selected plurality of unit display areas;
Illumination driving means for selecting a color of the monochromatic light emitted from the illumination device;
Direction switching means for controlling switching of the traveling direction of the monochromatic light in the liquid crystal shutter;
Comprising
1 frames constituting one stereo image includes a plurality of subfields, in each of the plurality of sub-fields, each one or more of the unit table display region, the first image or the second image having parallax with each other monochrome image is displayed, the color of the monochromatic light emitted, and characterized in that the traveling direction of the single color light, either is constituted by sequentially displaying the plurality of sub-fields different from each other Display device.   The display of one frame constituting the one stereoscopic image proceeds after the plurality of subfields corresponding to the monochromatic lights of a plurality of colors whose traveling direction is the first predetermined direction are sequentially displayed. 2. The display device according to claim 1, wherein the plurality of subfields corresponding to the monochromatic lights of a plurality of colors whose directions are the second predetermined direction are sequentially displayed.   In the display of one frame constituting the one stereoscopic image, the subfield of the first monochromatic light whose traveling direction is the first predetermined direction and the traveling direction is the second predetermined direction. The display device according to claim 1, wherein the subfields of the first monochromatic light are alternately displayed in sequence.   The display device according to claim 1, wherein one of the subfields includes a plurality of display periods in which a plurality of different unit display areas are selected.   The plurality of different unit display areas selected for each display period are the unit display areas arranged without being adjacent to each other in the first direction and the second direction. The display device according to claim 4.   An electronic apparatus comprising the display device according to claim 1.

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