JP2015225175A - Display device and display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a flicker.SOLUTION: A display device includes a display part which displays an image, an illumination part which irradiates the display part with light, a parallax adjustment part which includes a plurality of unit areas, and a first control part which sets the plurality of unit areas included in the parallax adjustment part to one of a transmission state for transmitting the light from the illumination part and a block state for blocking the light, according to input information on the position of a user. The first control part turns off the illumination part for a predetermined period of time from when the unit areas start a change from the transmission state to the block state.

Description

  The present disclosure relates to a display device and a display system that display an image.

  In recent years, various types of display devices such as liquid crystal display devices, plasma display devices, and organic EL display devices have been developed from the viewpoint of image quality and power consumption. In addition to display devices, it is applied to various electronic devices such as mobile phones and portable information terminals.

  Among display devices, there is a device that realizes stereoscopic display using binocular parallax. Such a display device includes a binocular parallax barrier type eye tracking compatible display device that detects and controls the positions of both eyes of the user.

JP 2005-157033 A

  By the way, in a binocular parallax barrier type eye tracking compatible display device, a luminance change during tracking may be visually recognized as flicker. The flickering is caused by the difference between the rising speed and falling speed of the liquid crystal.

  It is an object of the present disclosure to provide a display device and a display system that can improve flicker.

  According to one embodiment of the present invention, a display device that displays an image, an illumination unit that irradiates light to the display unit, a parallax adjustment unit having a plurality of unit regions, and input information related to a user's position A first control unit that sets one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light for the plurality of unit regions included in the parallax adjustment unit, The first control unit turns off the illumination unit within a predetermined time after the unit region starts transition from the transmission state to the blocking state.

  A display device according to another aspect of the present invention includes a display unit that displays an image, an illumination unit that irradiates light to the display unit, a parallax adjustment unit that includes a plurality of unit areas, and input information related to a user's position. And a first control unit configured to set one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light for the plurality of unit regions included in the parallax adjustment unit, and the use A second control unit that acquires input information related to a user's position, wherein the first control unit acquires input information related to the user's position from the second control unit, and the unit region is the transparent The lighting unit is turned off within a predetermined time after the transition from the state to the blocking state is started.

  According to one embodiment of the present invention, a display system that displays an image, an illumination unit that irradiates light to the display unit, a parallax adjustment unit that includes a plurality of unit regions, and input information regarding a user's position A first control unit configured to set one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light for the plurality of unit regions included in the parallax adjustment unit, and the user A second control unit that acquires input information related to the position of the user, wherein the first control unit acquires input information related to the position of the user from the second control unit, and the unit region is in the transparent state. The lighting unit is turned off within a predetermined time after starting the transition to the blocking state.

FIG. 1 is a block diagram illustrating a configuration example of a display system including a display device. FIG. 2 is a perspective view illustrating an example of the configuration of the illumination unit, the display unit, and the barrier unit of the display device. FIG. 3 is a perspective view showing the relationship between the pixels of the display unit and the unit areas of the barrier unit. FIG. 4 is a cross-sectional view illustrating a schematic cross-sectional structure of a module on which the display unit and the barrier unit are mounted. FIG. 5 is a circuit diagram illustrating an example of a pixel array of the display unit. FIG. 6 is a schematic diagram of pixels in color display. FIG. 7 is a schematic diagram of pixels in monochrome display. FIG. 8 is a diagram illustrating a concept of a control method by the control unit. FIG. 9 is a diagram illustrating an example of pixel display of pixels of the right eye image and left eye image displayed on the display unit. FIG. 10 is a diagram illustrating a part of a viewing range visually recognized by the user's left eye. FIG. 11 is a diagram illustrating a part of the viewing range visually recognized by the user's right eye. FIG. 12 is a diagram illustrating a change example of the pixel display of the pixel of the right eye image and the pixel of the left eye image by the control unit. FIG. 13 is a flowchart showing a flow of control by the control unit. FIG. 14 is a diagram illustrating a configuration example of the barrier unit. FIG. 15 is a diagram schematically illustrating an example of a cross section of the barrier portion when tracking is performed. FIG. 16 is a diagram illustrating a measurement example of a change in transmittance of the entire display device when tracking is performed. FIG. 17 is a diagram showing a countermeasure against flickering due to a luminance change according to the present embodiment. FIG. 18 is an explanatory diagram for determining the time from when the illumination unit is turned off to when it is turned on so that the flicker is not visually recognized. FIG. 19 is a diagram illustrating the relationship between the display content of the display device and the state of the illumination unit in the present embodiment. FIG. 20 is a flowchart showing the control processing of the illumination unit by the control unit in the present embodiment. FIG. 21 is a diagram illustrating an example of an electronic apparatus to which the display device according to this embodiment is applied. FIG. 22 is a diagram illustrating an example of an electronic apparatus to which the display device according to this embodiment is applied.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented with respect to the width, thickness, shape, and the like of each part in comparison with actual aspects for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited. It is not limited.
In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate.

The description will be given in the following order.
1. Embodiment 2. FIG. Application examples

[1. Embodiment]
The display device according to the present embodiment can be applied to a display device that displays a three-dimensional image, for example, by controlling a barrier unit stacked on the display unit. Examples of the display unit of the display device include a liquid crystal display (LCD) panel, an organic EL (Electro-Luminescence) panel, and a MEMS (Micro Electro Mechanical Systems). The following describes the case of using a horizontal electric field mode liquid crystal display panel, but a vertical electric field mode liquid crystal display panel may be used.

  The display device according to the present embodiment can be applied to both a display device compatible with monochrome display and a display device compatible with color display. In the case of a display device compatible with color display, one pixel (unit pixel) serving as a unit for forming a color image includes a plurality of sub-pixels (sub-pixels). More specifically, in a display device that supports color display, one pixel includes, for example, a sub-pixel that displays red (Red; R), a sub-pixel that displays green (Green; G), and a blue (Blue; B). ) Includes three sub-pixels.

  One pixel is not limited to the combination of RGB sub-pixels of the three primary colors, and one pixel can be configured by adding sub-pixels of one color or a plurality of colors to the sub-pixels of the three primary colors of RGB. . More specifically, for example, at least one of the sub-pixels that display white (W) for luminance enhancement is added to form one pixel, or the complementary color is displayed to expand the color reproduction range. It is also possible to configure one pixel by adding subpixels.

(Constitution)
FIG. 1 is a block diagram illustrating an example of a functional configuration of a display system 100 including a display device 1 according to the present embodiment. FIG. 2 is a perspective view illustrating an example of the configuration of the illumination unit, the display unit, and the barrier unit of the display device illustrated in FIG. 1. FIG. 3 is a perspective view showing the relationship between the pixels of the display unit and the unit areas of the barrier unit. 2 and 3 are schematic representations and are not necessarily the same as actual dimensions and shapes. The display device 1 illustrated in FIG. 1 is an example of the display device of the present disclosure, for example. The barrier unit 6 illustrated in FIG. 1 is an example of a parallax adjustment unit of the present disclosure.

  For example, the display device 1 displays an image that allows a user looking at the screen from a predetermined position to recognize a three-dimensional image with the naked eye. As shown in FIG. 1, the display device 1 includes an illumination unit 2, a display unit 4, a barrier unit 6, and a control unit 9. In the display device 1, the illumination unit 2, the display unit 4, and the barrier unit 6 are stacked in this order, for example. The display system 100 includes the display device 1 and the imaging unit 8.

  The illumination unit 2 is a backlight, for example. The illumination unit 2 is an illumination device that emits planar light toward the display unit 4. The illumination unit 2 includes, for example, a light source and a light guide plate, and emits light emitted from the light source from an emission surface facing the display unit 4 while being scattered by the light guide plate.

  The display unit 4 displays an image. The display unit 4 is a liquid crystal panel in which a large number of pixels are arranged in a two-dimensional array as shown in FIG. The light emitted from the illumination unit 2 is incident on the display unit 4. The display unit 4 displays an image on the display surface 4S illustrated in FIG. 2 by switching between transmitting and blocking light incident on each pixel.

  The barrier unit 6 is disposed on the display surface 4S (see FIG. 2) on which the image of the display unit 4 is displayed, that is, the surface opposite to the surface facing the illumination unit 2. In the following description, the direction in which the unit regions 150 are arranged is a first direction, the direction in which each unit region 150 extends is the second direction, and the direction orthogonal to both the first direction and the second direction is the third direction.

  As illustrated in FIG. 3, the barrier unit 6 includes a plurality of unit regions 150 extending in the second direction arranged in a row in a first direction orthogonal to the second direction. The barrier unit 6 is, for example, a liquid crystal panel, and aligns the liquid crystal by partially applying a voltage to the unit region 150. By aligning the liquid crystal, the unit region 150 becomes a transparent region 1511 shown in white or a blocking region 1512 shown in black, as shown in FIG. By such an operation, the barrier unit 6 switches whether the light incident on each unit region 150 is transmitted or blocked from the light emitting surface (for example, the surface 6S shown in FIG. 2). Accordingly, the barrier unit 6 adjusts the transmission region 1511 that transmits the image displayed on the display unit 4 and the blocking region 1512 that blocks the image displayed on the display unit 4 in the second direction. In the present embodiment, the barrier unit 6 is an example of a parallax adjustment unit.

  The imaging unit 8 captures an image. For example, a camera is used as the imaging unit 8. In the display system 100 that controls the barrier unit 6 to display a three-dimensional image, a so-called head tracking technique or eye tracking technique is used. In both the head tracking technique and the eye tracking technique, the image of the user is captured by the imaging unit 8, and the position of the user U1 in the image, for example, the position related to the user's face (for example, the center position of the face) is acquired. Technology or technology that acquires the position of the user's eyeball is used.

  The control unit 9 controls the operation of each unit of the display system 100 including the display device 1. The control unit 9 includes a first control unit 91 and a second control unit 92. The first control unit 91 controls, for example, lighting and extinguishing of the lighting unit 2, the amount of light and light intensity at the time of lighting, and controls an image to be displayed on the display unit 4. Control the operation (transmission / blocking). The first control unit 91 realizes display of a three-dimensional image by controlling the image displayed on the display unit 4 and the operation (transmission / blocking) of each unit region 150 of the barrier unit 6. For example, the second control unit 92 controls the imaging operation of the imaging unit 8, analyzes the image captured by the imaging unit 8, and acquires the position of the user U1 in the image. In the control unit 9, the essential component for solving the problem of improving flicker is the first control unit 91, and the second control unit 92 is not an essential component for solving the above-mentioned problem. For example, the imaging unit 8 and the second control unit 92 are included in an external device (not shown) other than the display device 1, and the first control unit 91 of the display device 1 receives the user U1 from these external devices. You may make it receive position information and perform it for control, such as lighting of the illumination part 2. FIG. In addition, the control part 9 in this embodiment is an example of a control part. The 1st control part in this embodiment is an example of the 1st control part. The 2nd control part in this embodiment is an example of the 2nd control part.

  The first control unit 91 and the second control unit 92 are, for example, computers including a CPU (Central Processing Unit) that is an arithmetic device and a memory that is a storage device. The first control unit 91 and the second control unit 92 can also realize various functions by executing a computer program using these hardware resources. Specifically, the first control unit 91 and the second control unit 92 read out a computer program stored in a predetermined storage unit (not shown), expand it in the memory, and include it in the program expanded in the memory CPU commands are executed. And according to the execution result of the command by CPU, the 1st control part 91 controls lighting and extinction of the illumination part 2, the light quantity at the time of lighting, and the intensity | strength of light, and controls the image displayed on the display part 4, The operation (transmission / blocking) of each unit region 150 of the barrier unit 6 is controlled.

  The display of a three-dimensional image by the first control unit 91 and the second control unit 92 in the present embodiment will be described. The second control unit 92 acquires the position of the user U1. For example, the second control unit 92 detects the positions of the user's right eye and left eye based on the image acquired by the imaging unit 8. The first control unit 91 determines the pixels of the right-eye image to be displayed on the display unit 4 and the left according to the positions of the right and left eyes of the user and the distance between the display device 1 and the positions of the right and left eyes. The pixel display which is the display content of each pixel of the eye image is determined. Subsequently, the first control unit 91 is a transmission region that is a unit region 150 that transmits light from among the unit regions 150 of the barrier unit 6 according to the positions and pixel display of the right and left eyes of the user. 1511 and a blocking region 1512 that is a unit region 150 that blocks light are determined. That is, the first control unit 91 allows the right eye image to be visually recognized by the user's right eye and the left eye image to be visually recognized by the user's left eye via the unit region 150 of the barrier unit 6. The transmission of light through the barrier unit 6 is controlled. In this way, the display device 1 displays an image that the user visually recognizes in three dimensions.

(Display section and barrier section)
Next, configuration examples of the display unit 4 and the barrier unit 6 will be described. FIG. 4 is a cross-sectional view illustrating a schematic cross-sectional structure of a module on which the display unit and the barrier unit are mounted. FIG. 5 is a circuit diagram illustrating a pixel array of the display unit. FIG. 6 is a schematic diagram of pixels in color display. FIG. 7 is a schematic diagram of pixels in monochrome display.

  As shown in FIG. 4, in the display device 1, the barrier unit 6 is stacked on the display unit 4. In the present embodiment, in the display device 1, the display unit 4 and the barrier unit 6 are bonded by the adhesive layer 41. The display unit 4 includes a pixel substrate 20, a counter substrate 30 disposed to face the pixel substrate 20 in a direction perpendicular to the surface of the pixel substrate 20, and a liquid crystal layer 60 inserted between the pixel substrate 20 and the counter substrate 30. And.

  The pixel substrate 20 is formed between a TFT substrate 21 as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the surface of the TFT substrate 21, and the TFT substrate 21 and the pixel electrode 22. The plurality of common electrodes COML and the pixel electrode 22 and the insulating layer 24 that insulates the common electrode COML. The TFT substrate 21 includes a thin film transistor (TFT) element Tr of each pixel 50 shown in FIG. 5, a pixel signal line SGL that supplies a pixel signal to each pixel electrode 22, and a scanning signal line that drives each TFT element Tr. Wiring such as GCL is formed. As described above, the pixel signal line SGL extends in a plane parallel to the surface of the TFT substrate 21, and supplies a pixel signal for displaying an image to the pixel 50. The pixel substrate 20 shown in FIG. 5 has a plurality of pixels 50 arranged in a matrix. The pixel 50 includes a TFT element Tr and a liquid crystal LC. In the example shown in FIG. 5, the TFT element Tr is composed of an n-channel MOS (Metal Oxide Semiconductor) type TFT element. The source of the TFT element Tr is connected to the pixel signal line SGL, the gate is connected to the scanning signal line GCL, and the drain is connected to one end of the liquid crystal LC. The liquid crystal LC has one end connected to the drain of the TFT element Tr and the other end connected to the common electrode COML.

  The pixels 50 are electrically connected to other pixels belonging to the same row of the pixel substrate 20 (hereinafter the same) by the scanning signal lines GCL. The scanning signal line GCL is connected to a gate driver, and a scanning signal (Vscan) is supplied from the gate driver. The pixel 50 is connected to other pixels belonging to the same column of the pixel substrate 20 by the pixel signal line SGL. The pixel signal line SGL is connected to a source driver, and a pixel signal (Vpix) is supplied from the source driver. Further, the pixel 50 is connected to other pixels belonging to the same row of the pixel substrate 20 by the common electrode COML. The common electrode COML is connected to a common electrode driver, and a drive signal (Vcom) is supplied from the common electrode driver. That is, in the example shown in FIG. 5, a plurality of pixels 50 belonging to the same row share one common electrode COML.

  The display unit 4 is formed in a matrix on the pixel substrate 20 by applying a scanning signal (Vscan) to the gate of the TFT element Tr of the pixel 50 through the scanning signal line GCL shown in FIG. One row (one horizontal line) of the pixels 50 is sequentially selected as a display drive target. The display unit 4 supplies the pixel signal (Vpix) by the source driver to each pixel 50 configuring one horizontal line sequentially selected via the pixel signal line SGL shown in FIG. These pixels 50 are configured to display one horizontal line in accordance with the supplied pixel signal (Vpix). The display unit 4 applies a drive signal (Vcom) to drive the common electrode COML.

  As described above, the display unit 4 sequentially selects one horizontal line by driving the scanning signal line GCL so as to perform line sequential scanning in a time division manner. In addition, the display unit 4 displays each horizontal line by supplying a pixel signal (Vpix) to the pixels 50 belonging to one horizontal line. When performing this display operation, the display unit 4 applies a drive signal (Vcom) to the common electrode COML.

  Returning to FIG. 4, the counter substrate 30 includes a glass substrate 31 and a color filter 32 formed on one surface of the glass substrate 31. A polarizing plate 35 is disposed on the other surface of the glass substrate 31. Further, the barrier portion 6 is bonded to the surface of the polarizing plate 35 opposite to the glass substrate 31 side by an adhesive layer 41. The color filter 32 may be formed on the pixel substrate 20 side.

  In the color filter 32, for example, color filters colored in three colors of red (R), green (G), and blue (B) are periodically arranged, and each of the pixels 50 shown in FIG. , B are associated as one set. Specifically, as illustrated in FIG. 6, one pixel serving as a unit for forming a color image, that is, the unit pixel 5 includes, for example, a plurality of sub-pixels (sub-pixels). In this example, the unit pixel 5 includes a sub-pixel 50R that displays R, a sub-pixel 50B that displays B, and a sub-pixel 50G that displays G. The sub-pixels 50 </ b> R, 50 </ b> B, and 50 </ b> G included in the unit pixel 5 are arranged in the X direction, that is, the row direction of the display device 1. The color filter 32 faces the liquid crystal layer 60 in a direction perpendicular to the surface of the TFT substrate 21. The color filter 32 may be a combination of other colors as long as it is colored in a different color.

  The unit pixel 5 may further include subpixels of one color or a plurality of colors. When the display unit 4 supports only monochrome display, as shown in FIG. 7, one pixel as a unit for forming a monochrome image, that is, the unit pixel 5M corresponds to a pixel 50 (sub-pixel in a color image). . The unit pixel 5 is a basic unit for displaying a color image, and the unit pixel 5M is a basic unit for displaying a monochrome image.

  The common electrode COML functions as a common drive electrode (counter electrode) of the display unit 4. In the present embodiment, the common electrode COML is a plate-like electrode common to the plurality of pixel electrodes 22. One common electrode COML may be arranged to correspond to a plurality of pixel electrodes 22 (pixel electrodes 22 constituting one row). The common electrode COML faces the pixel electrode 22 in a direction perpendicular to the surface of the TFT substrate 21, and extends in a direction parallel to the direction in which the scanning signal line GCL extends. The common electrode COML is configured such that a drive signal having an AC rectangular waveform is applied from the drive electrode driver to the common electrode COML. The insulating layer 24 and the color filter 32 are bonded by a sealing material 40. A flexible cable 42 is connected to the end of the TFT substrate 21.

  The liquid crystal layer 60 modulates light passing therethrough according to the state of the electric field. In the present embodiment, the liquid crystal layer 60 uses, for example, a liquid crystal in a horizontal electric field mode such as FFS (fringe field switching) or IPS (in-plane switching). The liquid crystal may be used. For example, liquid crystal in various modes such as TN (Twisted Nematic), VA (Virtual Alignment), ECB (Electrically Controlled Birefringence), or the like may be used.

  An alignment film is disposed between the liquid crystal layer 60 and the pixel substrate 20 and between the liquid crystal layer 60 and the counter substrate 30, and an incident-side polarizing plate is disposed on the lower surface side of the pixel substrate 20. May be.

  The barrier unit 6 includes a substrate 121, a plurality of unit region electrodes 122 arranged in a row above the substrate 121, a glass substrate 131, and a plurality of unit region electrodes 122 disposed on the glass substrate 131 side. A drive electrode 133 and a polarizing plate 135 disposed on the other surface of the glass substrate 131 are provided. The drive electrode 133 may be a plate-like electrode common to the plurality of unit region electrodes 122.

  A liquid crystal layer 160 is filled in a region sandwiched between the surface on the drive electrode 133 side of the glass substrate 131 and the surface on the unit region electrode 122 side of the substrate 121. The liquid crystal layer 160 modulates light passing therethrough according to the state of the electric field. In the present embodiment, for example, liquid crystal of various modes such as TN, VA, and ECB is used for the liquid crystal layer 160, but the liquid crystal layer 160 is not limited to this, and a liquid crystal of a horizontal electric field mode may be used. For example, a transverse electric field mode liquid crystal such as FFS or IPS may be used. An alignment film is disposed between the liquid crystal layer 160 and the substrate 121 and between the liquid crystal layer 160 and the glass substrate 131, and an incident-side polarizing plate is disposed on the lower surface side of the substrate 121, that is, on the display unit 4 side. May be.

  The unit region electrode 122 has a shape similar to that of the unit region 150 shown in FIG. 3 and has an elongated plate shape extending along the first direction. The unit region electrodes 122 are arranged in a plurality of rows in the second direction.

  The glass substrate 131 and the substrate 121 are bonded by a sealing material 140. A flexible cable 142 is connected to the end of the substrate 121.

  The display unit 4 and the barrier unit 6 are configured as described above, and the user can switch the voltage to be applied to the pixel electrode 22 and the unit region electrode 122 based on the signal from the control unit 9 in three dimensions. The image to be viewed is displayed.

(Control method by controller)
A control method by the control unit 9 including the first control unit 91 and the second control unit 92 will be specifically described with reference to FIGS. 8 to 12. FIG. 8 is a diagram illustrating a concept of a control method by the control unit 9 according to the present embodiment. FIG. 9 is a diagram illustrating an example of pixel display of the pixels of the right-eye image and the left-eye image displayed on the display unit 4. FIG. 10 is a diagram illustrating a part of a viewing range visually recognized by the user's left eye. FIG. 11 is a diagram illustrating a part of the viewing range visually recognized by the user's right eye. FIG. 12 is a diagram illustrating a modification example of the pixel display of the pixel of the right eye image and the pixel of the left eye image by the first control unit 91.

  The second control unit 92 controls the imaging unit 8 to photograph the user U1. The second control unit 92 detects the position of the user U1 based on the image of the user U1 photographed by the photographing unit 8. Moreover, the 2nd control part 92 acquires the position of the user's U1 right eye and left eye based on the user's U1 image. Subsequently, the second control unit 92 calculates the distance between the display device 1 and the positions of the right eye and the left eye of the user U1. The distance between the position of the right eye RE and left eye LE of the user U1 and the display device 1 (barrier unit 6) is, for example, the position of the right eye RE and left eye LE of the user U1 and the barrier unit 6 Axial distance. For example, when the display device 1 is activated, the second control unit 92 controls the distance between the display device 1 and the positions of the right eye RE and the left eye LE of the user U1 and the display unit 4 and the barrier unit 6. The reference distance is calculated in advance. The reference distance corresponds to, for example, the distance between the display device 1 (barrier unit 6) and the position of the right eye RE and left eye LE of the user U1 when viewing an image displayed on the display unit 4. As a modification, the second control unit 92 acquires a predetermined position (for example, the center position of the face) of the face of the user U1 as position information, and the predetermined position of the face becomes the center position of the screen of the display unit 4. On the other hand, the position of the opening region of the barrier unit 6 may be determined based on what position (for example, an angle and a distance with respect to the center of the screen) is present.

  Subsequently, the first control unit 91 determines the right-eye image to be displayed on the display unit 4 according to the distance between the display device 1 (barrier unit 6) and the positions of the right eye RE and the left eye LE of the user U1. The pixel display of the pixel and the pixel of the image for the left eye is determined, and light is emitted from each unit region 150 of the barrier unit 6 according to the positions of the right eye RE and the left eye LE of the user U1 and the pixel display. A region to be transmitted (a region that transmits light and a region that blocks light) is determined. As a modification, the first control unit 91 causes the right eye to be displayed on the display unit 4 regardless of the distance between the display device 1 (barrier unit 6) and the positions of the right eye RE and the left eye LE of the user U1. The pixel display of the pixels of the image for the image and the pixels of the image for the left eye may be fixed without being changed.

  For example, as shown in step S <b> 1 of FIG. 8, the second control unit 92 calculates the distance “D = d <b> 1” between the positions of the right eye RE and left eye LE of the user U <b> 1 and the display device 1. Subsequently, according to the calculated positions and distances of the right eye RE and the left eye LE, the second control unit 92, for example, as shown in step S1 of FIG. The display of the pixels is determined so that the pixels P2 of the image for the right eye RE are alternately displayed on the display unit 4. 8 shows an example in which the pixel P1 of the image for the left eye LE and the pixel P2 of the image for the right eye RE are alternately displayed, but the user U1 determines the parallax between the left eye LE and the right eye RE. As long as it can be secured, the display is not limited to the example of alternately displaying, and any display may be used. Then, for example, as shown in step S1 of FIG. 8, the second control unit 92 selects the left eye among the pixels P1 for the left eye LE and the pixels P2 for the right eye RE that are alternately displayed on the display unit 4. The LE pixel P1 is visually recognized by the user U1's left eye via the barrier unit 6, and the right eye RE pixel P2 is visually recognized by the user U1's right eye RE via the barrier unit 6. A region through which light is transmitted is determined from the unit regions 150 of the barrier unit 6.

  In step S1 shown in FIG. 8, by the control by the first controller 91, as shown in FIG. 9, a plurality of pixels P1 of the image for the left eye LE are displayed on the display surface 4S of the display unit 4 in the Y-axis direction. The pixel column of the left eye LE image pixel P1 and the pixel column of the right eye RE image pixel P2 configured by displaying a plurality of pixels P2 of the right eye RE image in the Y-axis direction are X They are alternately arranged in a row in the axial direction. Further, in step S1 shown in FIG. 8, the pixel P1 for the left eye LE displayed on the display unit 4 is displayed on the display unit 4 through the barrier unit 6 as shown in FIG. A region through which light is transmitted is determined from the barrier unit 6 (each unit region 150) so as to be visually recognized by the left eye LE. Similarly, as shown in FIG. 11, the right eye RE pixel P <b> 2 displayed on the display unit 4 is visually recognized by the right eye RE of the user U <b> 1 through the barrier unit 6 as controlled by the first control unit 91. As described above, a region through which light is transmitted is determined from the barrier unit 6 (each unit region 150 thereof). Note that a region in which a plurality of transmission regions 1511 in the unit region 150 are arranged in the X-axis direction may be referred to as an opening region, and a region in which a plurality of light-shielding regions 1512 are arranged in the X-axis direction may be referred to as a blocking region.

  Subsequently, as a result of calculating the distances between the display device 1 and the positions of the right eye RE and the left eye LE of the user U1, the first control unit 91 calculates the positions of the right eye RE and the left eye LE calculated in step S1, and When it is different from the distance, the pixel display on the display unit 4 and the transmission and blocking of the unit region 150 of the barrier unit 6 are updated. That is, the first control unit 91 determines the pixel P1 and the right eye of the left eye LE image to be displayed on the display unit 4 according to the distance between the display device 1 and the positions of the right eye RE and the left eye LE of the user U1. The pixel display of the pixel P2 of the RE image is changed, and the unit region 150 that transmits light from among the unit regions 150 of the barrier unit 6 is changed.

  For example, as shown in step S <b> 2 of FIG. 8, the first control unit 91 calculates the distance “D = d2” between the positions of the right eye RE and left eye LE of the user U <b> 1 and the display device 1. Subsequently, according to the calculated positions and distances of the right eye RE and the left eye LE, the first control unit 91, for example, as shown in Step S2 of FIG. 8, the pixel P1 and the right eye of the image for the left eye LE The pixel display of the pixel P2 of the RE image is changed. Subsequently, the first control unit 91 determines that the pixel P2 for the right eye RE passes through the barrier unit 6 according to the changed pixel display and the positions of the right eye RE and the left eye LE of the user U1. It is visually recognized by the right eye RE of U1 and light is emitted from each unit region 150 of the barrier unit 6 so that the pixel P1 for the left eye LE is visually recognized by the left eye LE of the user U1 through the barrier unit 6. Determine the area to be transmitted.

  In step S2 shown in FIG. 8, the pixel display of the pixel P1 of the left eye LE image and the pixel P2 of the right eye RE image to be displayed on the display unit 4 as shown in FIG. And the unit region 150 that transmits light from among the unit regions 150 of the barrier unit 6 is changed. That is, step S2 shown in FIG. 8 is in a state where the positions of the pixel column of the pixel P1 of the image for the left eye LE in step S1 and the pixel column of the pixel P2 of the image for the right eye RE are interchanged. In order to replace the positions in this way, the pixel P1 for the left eye LE displayed on the display unit 4 is controlled by the first control unit 91 as shown in FIG. As viewed by the left eye LE, a region through which light is transmitted is changed from among the barrier units 6 (unit regions 150 thereof). Similarly, as shown in FIG. 12, the right eye RE pixel P <b> 2 displayed on the display unit 4 is visually recognized by the right eye RE of the user U <b> 1 through the barrier unit 6 by the control by the first control unit 91. As described above, the region through which light is transmitted is changed from among the barrier unit 6 (each unit region 150 thereof).

  As described above, the first control unit 91 determines the pixels of the left eye LE image and the right eye according to the distance between the display device 1 (barrier unit 6) and the positions of the right eye RE and the left eye LE of the user U1. The pixel display of the pixels of the RE image is changed. Note that the pixel display changing method executed by the first control unit 91 according to the distance between the position of the right eye RE and left eye LE of the user U1 and the display device 1 (barrier unit 6) is the right eye RE and Based on the positional relationship between the position of the left eye LE and the display device 1, it may be preset by calibration at the design stage, or may be calculated by real-time processing at the use stage of the display device 1. Further, the first control unit 91 fixes the pixel display without changing the pixel display according to the distance between the position of the right eye RE and the left eye LE of the user U1 and the display device 1 (barrier unit 6). Also good.

  As described above, the first control unit 91 displays the right-eye RE image via the unit region 150 of the barrier unit 6 according to the positions of the right eye RE and the left eye LE of the user UI. A unit region through which light is transmitted is determined from among the unit regions 150 of the barrier unit 6 so that the right eye RE can visually recognize the image and the left eye LE image can be visually recognized by the left eye LE of the user UI. For example, after changing the pixel display, the first control unit 91 changes a unit region that transmits light from among the unit regions 150 of the barrier unit 6 according to the changed pixel display.

(Control flow by the control unit)
The flow of control by the first control unit 91 according to this embodiment will be described with reference to FIG. FIG. 13 is a flowchart showing a flow of control by the first control unit 91 according to the present embodiment. The control shown in FIG. 13 is executed, for example, with the start of displaying a three-dimensional image.

  As illustrated in FIG. 13, the first control unit 91 detects the positions of the right eye RE and the left eye LE of the user UI based on the image acquired by the imaging unit 8 (step S101). Subsequently, the first control unit 91 calculates the distance between the display device 1 and the positions of the right eye RE and the left eye LE of the user U1 (step S102). The distances between the display device 1 and the positions of the right eye RE and the left eye LE are, for example, the shortest distances between the positions of the right eye RE and the left eye LE of the user U1 and the barrier unit 6.

  Subsequently, the first control unit 91 determines the pixels of the right eye RE image and the left eye LE image to be displayed on the display unit 4 based on the distance between the display device 1 and the positions of the right eye RE and the left eye LE. The pixel display of the pixel is determined (step S103). Subsequently, the first control unit 91 controls light transmission and blocking of the barrier unit 6 based on the display device 1, the positions of the right eye RE and the left eye LE, and the pixel display (step S104). That is, the first control unit 91 determines a region that transmits light and a region that blocks light from among the unit regions 150 of the barrier unit 6.

  Then, the first control unit 91 determines whether an image is being displayed (step S105). If the result of determination is that an image is being displayed (step S105, Yes), the first controller 91 returns to step S101 and continues the control shown in FIG. On the other hand, if the result of determination is that an image is not being displayed (No at step S105), the first control unit 91 ends the control shown in FIG.

  As a modification, the first control unit 91 acquires a predetermined position (for example, the center position of the face) of the face of the user U1 as position information (step S101), and the predetermined position of the face is the screen of the display unit 4. Is calculated with respect to the center position (for example, an angle and a distance with respect to the center of the screen) (step S102), the pixel display of the pixel is determined (step S103), and the light of the barrier unit 6 is Transmission and blocking may be controlled (step S104).

  Further, the detection of the position of the user U1 is not limited to the timing of step S101 described above, and may be performed at an arbitrary timing. Further, only when the position and distance of the user U1 are equal to or greater than a predetermined threshold value, the process of step S103 and step S104 is performed, and when the user U1 is less than the threshold value, the process of step S103 and step S104 is not performed. You may return to step S101.

  Further, the configuration of the barrier unit 6 will be described with reference to FIG. FIG. 14 is a diagram illustrating a configuration example of the barrier unit. The barrier unit 6 includes a plurality of unit areas. For example, as illustrated in FIG. 14, the barrier unit 6 includes unit regions 151 to 158. In the barrier unit 6, signal lines 1221 to 1228 are provided corresponding to the unit regions 151 to 158. The signal lines 1221 to 1228 are connected to the corresponding unit region electrodes 122, respectively. In the unit regions 151 to 158, the light transmission state is set according to the voltage value applied to the signal lines 1221 to 1228. That is, the unit regions 151 to 158 are set to a state where light is transmitted or a state where light is not transmitted (light is blocked) depending on the voltage value applied to the signal lines 1221 to 1228.

  Referring to FIG. 14, driver circuits D <b> 1 to D <b> 8 that apply voltage values are connected to signal lines 1221 to 1228 corresponding to the unit regions 151 to 158 constituting the barrier unit 6. The driver circuits D <b> 1 to D <b> 8 are controlled by the control unit 9 to have a voltage value Vl (for example, 0 (V)) that is set to transmit light and a voltage that is set to a state that does not transmit light (blocks light). A value Vh (for example, 5 (V)) is selectively output. Further, the driver circuits D1 to D8 may be provided in the control unit 9 or may be provided outside the display area of the barrier unit 6 (so-called frame portion).

  Referring to FIG. 14, driver circuits D <b> 1 to D <b> 8 that apply voltage values are connected to signal lines 1221 to 1228 corresponding to the unit regions 151 to 158 constituting the barrier unit 6. In the unit regions 151, 152, and 158, a voltage Vh that is set so as not to transmit light (block light) is applied by the outputs of the driver circuits D1, D2, and D8. In addition, the unit regions 153 to 157 are applied with a voltage Vl that is set to transmit light by the outputs of the driver circuits D3 to D7.

(Operation example)
Here, an example of operation of the display device when tracking is performed will be described with reference to FIGS. 15 to 20. FIG. 15 is a diagram schematically showing a cross section of the barrier section 6 when tracking is performed. FIG. 15 schematically shows, for example, a cross section taken along line AA ′ of FIG. FIG. 15 shows unit areas 151 to 158 which are a part of a plurality of unit areas constituting the barrier unit 6.

  In FIG. 15, the unit areas 151 to 158 are turned off when a voltage value set to transmit light is applied. This OFF state is expressed as white in FIG. The unit areas 151 to 158 are turned on when a voltage value set to a state where light is not transmitted (light is blocked) is applied. This ON state is expressed in black in FIG.

  In the state P11 shown in FIG. 15, voltage values that are set to transmit light are applied to the unit regions 153 to 157. In the state P11, the unit regions 151, 152, and 158 are applied with voltage values that are set to a state where light is not transmitted (light is blocked).

  In general, the speed at which the liquid crystal changes from the ON state to the OFF state (that is, the falling speed) is slower than the speed at which the liquid crystal changes from the OFF state to the ON state (that is, the rising speed). Due to the difference in speed, in the binocular parallax barrier type eye tracking compatible display device, the state P21 exists during the transition from the state P11 to the state P31 shown in FIG. The state P21 is a state immediately after switching that exists in the middle of the transition from the state P11 that is the state before tracking to the state P31 that is the state after tracking.

  In the state P21, the number of unit areas in the OFF state is smaller than that in the state P11. For this reason, in the state P21, when no countermeasure is taken, the brightness of the entire display device 1 decreases for a moment and the screen becomes dark. Thereafter, the state P31 is reached, and the display device 1 as a whole recovers its original luminance. That is, immediately after the screen is switched, the ratio of black display to the display area increases, and the image is felt dark as a whole. After that, it becomes bright because it becomes the original display ratio. For this reason, when no countermeasure is taken, a change in luminance may be visually recognized as flicker.

  FIG. 16 is a diagram illustrating an example of a change in transmittance of the entire display device 1 when tracking is performed. In FIG. 16, the horizontal axis represents time, and the vertical axis represents the voltage value applied to the unit region or the light transmittance. As shown in FIG. 16, in this example, at time t1, the voltage value applied to the unit region 152 is set to a state in which light is transmitted from a voltage value Vh set to a state in which light is not transmitted (light is blocked). And the voltage value applied to the unit region 157 is changed from the voltage value Vl set to a state of transmitting light to the voltage value Vh set to a state of not transmitting light (blocking light). Change.

  As shown in FIG. 16, for example, the transmittance of the entire display device 1 in the state P11 (hereinafter sometimes referred to as the total transmittance) decreases as in the state P21 as described above. Thereafter, the overall transmittance gradually recovers and enters a state P31. As described above, when the overall transmittance is gradually recovered after the sudden decrease, the luminance change may be visually recognized as flicker if no measures are taken.

  In the present embodiment, as a countermeasure against flickering due to luminance change, the illumination unit 2 is turned off within a predetermined time during which the transmittance is reduced, and the illumination unit 2 is turned on after the transmittance is restored. This countermeasure will be described with reference to FIG.

  FIG. 17 is a diagram showing a countermeasure against flickering due to a luminance change according to the present embodiment. In FIG. 17, the state of the illumination unit 2 is shown instead of the overall transmittance in FIG. The state of the illuminating unit 2 shown in FIG. 17 indicates the level of the control voltage that controls the illuminating unit 2 to be in a lighting state or a light-off state. In the present embodiment, a period during which the control voltage is at a high level is a period during which the illumination unit 2 is controlled to be turned on, and a period during which the control voltage is at a low level is a period during which the illumination unit 2 is controlled to be turned off.

  As shown in FIG. 17, in the present embodiment, the illumination unit 2 is turned off at time t1 when the unit region 157 starts transition from the transmission state to the cutoff state and the transmittance decreases, and then the illumination unit at time t2. 2 is lit. That is, in the display device 1 of the present embodiment, when the unit area 157 transitions to the blocking state and the illumination unit 2 is turned off within a predetermined time during which the overall transmittance is reduced, and the unit area 152 transitions to the transmission state. When the overall transmittance is restored, the illumination unit 2 is turned on.

  Here, the timing at which the illumination unit 2 is turned on after the illumination unit 2 is turned off is not limited to the case when the transmittance is completely restored to the original state. The lighting unit 2 may be turned on at a timing when the recovery is achieved to some extent.

  The time from when the illumination unit 2 is turned off to when it is turned on is determined so that flicker is not visually recognized. FIG. 18 is an explanatory diagram for determining the time from when the illumination unit 2 is turned off to when it is turned on so that the flicker is not visually recognized. In FIG. 18, a solid line J shows an example of a change in luminance when switching from the transmission state to the blocking state, and a broken line H shows an example of a change in luminance when switching from the blocking state to the transmission state. Yes.

  In FIG. 18, referring to the solid line J and the broken line H, from the start of the luminance change when switching from the transmission state to the blocking state, the end of the luminance change when switching from the blocking state to the transmission state. The time until is, for example, 16.6 ms.

The relative light amount W1 when the switching between the transmission state and the blocking state is not performed for the unit region 150 constituting the barrier unit 6 is as follows.
W1 = 1.0 * 16.6 ms = 16.6
It becomes.

  Here, a straight line along the change in luminance when switching from the transmission state to the blocking state is one side, and a straight line along the change in luminance when switching from the blocking state to the transmission state is the other one. Assume a triangle Δ as an edge. As a result of verification by the inventors, it has been found that if the time corresponding to the base of the triangle Δ is, for example, 12 ms or less, flicker is not visually recognized.

In FIG. 18, in the time from the start of the change of the solid line J to the end of the change of the broken line H, the part excluding the triangle Δ part in the broken line H is for the unit region 150 constituting the barrier unit 6. The relative light amount when switching between the transmission state and the blocking state is obtained. The relative light quantity W2 in this case is
W2 = 1/2 * 1.0 * 12 ms + (16.6-12) * 1.0
= 10.6
It becomes. Therefore, the luminance reduction amount B1 obtained by subtracting the relative light amount W2 from the relative light amount W1 is
B1 = 16.6-10.6 = 6
It becomes. The relative light quantity R with respect to the entire barrier unit 6 is
R = 6 / (6 * 16.6) = 6%
It is.

  As a result of such analysis, it can be seen that if the relative light quantity R with respect to the entire barrier section 6 is 6% or less, the flicker is not visually recognized. Therefore, there is one unit region (for example, unit region 157) that switches from the transmission state to the blocking state, and one unit region (for example, unit region 152) that switches from the blocking state to the transmission state. If the change in luminance is about 6 * 6 = 36% or less, it can be seen that the flicker is not visually recognized.

  That is, flickering is not visually recognized if the illumination unit 2 is turned off during a period in which the relative light amount from the state before and after the switching between the transmission state and the blocking state of the unit region 150 of the barrier unit 6 is a predetermined value or less. That is, if the illumination unit 2 is turned off at a timing when the relative light amount falls below a predetermined value and the illumination unit 2 is turned on at a timing when the relative light amount returns to a predetermined value or more, flicker is not visually recognized. As a result of verification by the inventor, it was found that if the predetermined value is 60% of the total light amount, flicker is not visually recognized.

  Therefore, when the first control unit 91 performs control so that the illumination unit 2 is turned off within a predetermined time after the unit region starts transition from the transmission state to the cutoff state, the transmission through the unit region 150 of the barrier unit 6 is performed. When the rate changes and returns to the original value, the predetermined time may be set based on the rate of change in transmittance when the rate is changing with respect to the transmittance before and after the change.

  Thus, since the 1st control part 91 turns off the illumination part 2 within the predetermined time when the brightness | luminance is falling by controlling the extinction time of the illumination part 2, as a display apparatus 1 whole, a user Luminance change is not visually recognized in the UI, and the above-mentioned flicker is not visually recognized or reduced.

  FIG. 19 is a diagram illustrating the relationship between the display content of the display device and the state of the illumination unit in the present embodiment. In FIG. 19, the horizontal axis represents time, and the vertical axis represents voltage value. FIG. 19 shows the change in the applied voltage value to the unit region 152 and the unit region 157 described above, the switching timing of the display content of the display device 1, and the state of the illumination unit 2.

  As shown in FIG. 19, when detecting a change in the position of the user U1, the display device 1 switches the unit area as described above. The timing for switching the unit area is made to coincide with the timing for switching the display contents of the display device 1, for example.

  In the present embodiment, it is assumed that the display device 1 has detected a change in the position of the user U1 before time t1, and at time t1, the unit region 152 is switched from the blocking state to the transmission state, and the unit region 157 is switched from the transmission state. Switch to the blocking state. That is, the timing at which the unit areas 152 and 157 can be switched is the period shown in black in FIG.

  Here, the display content of the display device 1 is an image including a plurality of frames. When the frame of the image is switched, the first control unit 91 switches the unit areas 152 and 157, for example, in the same period as the period for switching the display contents. The timing for switching the display contents is a period indicated by white lines in FIG.

  When the first control unit 91 detects a change in the position of the user UI in the middle of one frame, the first control unit 91 sets the transmission state of the unit regions 152 and 157 at the start timing of the next frame, that is, the timing at which the image frame is switched. It is possible to change the setting to either the blocking state.

  Moreover, the 1st control part 91 synchronizes mutually with control of the barrier part 6, the change of the display content of the display part 4, and control of light extinction of the illumination part 2, and lighting. As described above, the first control unit 91 turns off the illumination unit 2 at time t1 and turns it on at time t2. For this reason, the time from the time t1 to the time t2 is the turn-off time of the illumination unit 2.

  In the present embodiment, after time t2, for example, as shown at time t3, the timing of switching the frame of the image that is the display content of the display device 1 may come. Unless a change in position is detected, the illumination unit 2 is not turned off and remains on. However, the display device 1 may turn off the illumination unit 2 at the same timing without detecting a change in the position of the user UI.

  Next, the content of the process performed by the first control unit 91 that controls the illumination unit 2 as described above will be described with reference to FIG. FIG. 20 is a flowchart showing a control process of the illumination unit 2 by the control unit 9 in the present embodiment.

  Referring to FIG. 20, the first control unit 91 determines whether or not a change in the position of the user UI is detected in step S <b> 201. If the first control unit 91 determines that a change in the position of the user UI has been detected (step S201, Yes), in step S202, when the frame constituting the image by the display device 1 ends, that is, the user UI It is determined whether or not the end timing of one frame that comes after detecting a change in position has arrived. On the other hand, if the first control unit 91 determines that a change in the position of the user UI has not been detected (No in step S201), the first control unit 91 continues the process in step 201. If the first control unit 91 determines that the end timing of one frame has arrived (step S202, Yes), in step S203, the first control unit 91 performs switching for the unit region 150, and the opening region by the transmission region 1511 and the blocking region by the light shielding region 1512. Move the position of. If it is determined that the end timing of one frame has not arrived (No at Step S202), the first control unit 91 continues the process of Step 202.

  When the first control unit 91 detects changes in the positions of the right eye and the left eye, the first control unit 91 does not change the distance between the display device and the positions of the right eye and the left eye or does not affect the display of the three-dimensional image. If the distance between the right eye and the left eye is changed, the light transmission by the plurality of unit areas 150 arranged before and after the change of the position of the right eye and the left eye is made constant so that the opening area by the transmissive area 1511 and the light shielding area 1512 are blocked. The positions of the opening area and the blocking area are moved while maintaining the width of the area. In this case, the first control unit 91 does not change the distance between the display device and the positions of the right eye and the left eye. The plurality of unit regions 150 are set to one of a transmission state and a blocking state so that the light transmittance of the plurality of unit regions 150 is constant before and after the change. That is, if the distance between the display device and the positions of the right eye and the left eye is within a predetermined range, the first control unit 91 opens the opening area and the light shielding area by the transmission area 1511 before and after the change of the position of the user UI. The width of the blocking region by 1512 is made constant.

  The first control unit 91 turns off the illumination unit 2 in step S <b> 204 after moving the positions of the opening region by the transmission region 1511 and the blocking region by the light shielding region 1512. In step S205, the first control unit 91 determines whether or not a predetermined time has elapsed since the illumination unit 2 was turned off. If the first control unit 91 determines that the predetermined time has elapsed (step S205, Yes), the lighting unit 2 is turned on in step S206. On the other hand, if the first control unit 91 determines that the predetermined time has not elapsed (step S205, No), the first control unit 91 continues the process of step 205.

  As described above, the flicker is not visually recognized or reduced by the first control unit 91 turning off the illumination unit 2 within a predetermined time after the unit region starts transition from the transmission state to the cutoff state. Is done.

[2. Application example]
Next, an application example of the display device 1 described in the embodiment will be described with reference to FIGS. 21 and 22. 21 and 22 are diagrams illustrating an example of an electronic apparatus to which the display device 1 according to the present embodiment is applied. The display device 1 according to the present embodiment and the modification can be applied to electronic devices in various fields such as a television device, a digital camera, a notebook personal computer, a mobile terminal device such as a mobile phone, or a video camera. . In other words, the display device 1 according to the present embodiment and the modification can be applied to electronic devices in various fields that display an externally input video signal or an internally generated video signal as an image or video. is there.

(Application example 1)
The electronic apparatus shown in FIG. 21 is a television apparatus to which the display device 1 according to this embodiment and the modification is applied. The television apparatus includes, for example, a video display screen unit 510 including a front panel 511 and a filter glass 512, and the video display screen unit 510 is the display device 1 according to the present embodiment and the modification.

(Application example 2)
The electronic device illustrated in FIG. 22 is an information portable terminal that operates as a portable computer, a multifunctional portable phone, a portable computer capable of voice communication, or a portable computer capable of communication, and is sometimes referred to as a so-called smartphone or tablet terminal. . This information portable terminal has a display unit 562 on the surface of a housing 561, for example. The display unit 562 is the display device 1 according to the present embodiment and the modification.

  As described above, the present technology has been described with reference to the embodiments and application examples to the electronic apparatus. However, the present technology is not limited to these embodiments and the like, and various modifications are possible. For example, in the above-described embodiment and the like, the case where the control unit 9 of the display device 1 includes the first control unit 91 and the second control unit 92 has been described, but not limited to this case, the control unit 9 of the display device 1 Only the first control unit 91 may be included.

  Further, the method of acquiring the position of the user U1 is not limited to capturing a user image, but based on an infrared sensor, RFID (Radio Frequency IDentification) and reader, a method using an IC tag and a reader, a microphone, and the like. The method of specifying the position may be used, or a combination of these may be used.

  In the above-described embodiments and the like, the case of a liquid crystal display device is illustrated as an example of disclosure. However, as other application examples, an electronic paper having an EL (Electro Luminescence) display device, other self-luminous display devices, an electrophoretic element, or the like. Any flat panel type display device such as a type display device may be used. Needless to say, the present invention can be applied without any particular limitation from small to medium size.

  In the scope of the idea of the present invention, those skilled in the art can conceive various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. For example, those in which the person skilled in the art has appropriately added, deleted, or changed the design of the above-described embodiments, or those in which processes have been added, omitted, or changed conditions are also the subject matter of the present invention. As long as it is included in the scope of the present invention.

  In addition, other functions and effects brought about by the aspects described in the present embodiment, which are apparent from the description of the present specification, or can be appropriately conceived by those skilled in the art, are naturally understood to be brought about by the present invention. .

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Illumination part 4 Display part 6 Barrier part 8 Imaging part 9 Control part 91 1st control part 92 2nd control part 100 Display system

Claims (9)

A display for displaying an image;
An illumination unit for irradiating the display unit with light;
A parallax adjustment unit having a plurality of unit regions;
The plurality of unit areas included in the parallax adjustment unit are set to one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light according to input information related to a user's position. A first control unit;
Including
The first control unit turns off the illumination unit within a predetermined time after the unit region starts transition from the transmission state to the blocking state.
Display device. A display for displaying an image;
An illumination unit for irradiating the display unit with light;
A parallax adjustment unit having a plurality of unit regions;
The plurality of unit areas included in the parallax adjustment unit are set to one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light according to input information related to a user's position. A first control unit;
A second control unit for acquiring input information relating to the position of the user;
Including
The first control unit acquires input information related to the position of the user from the second control unit, and within a predetermined time after the unit region starts transition from the transmission state to the blocking state. Turning off the illumination unit;
Display device. The first controller is
When the unit area is controlled to turn off the illumination unit within a predetermined time after the transition from the blocking state to the transmission state is started, the transmittance of the unit area changes and returns to the original state. The predetermined time is set based on the change rate of the transmittance when changing with respect to the transmittance before and after the change,
The display device according to claim 1. The display unit
Display an image containing multiple frames,
The first controller is
Changing the setting of the unit area to either the transparent state or the blocking state when the frame of the image is switched,
The display device according to any one of claims 1 to 3. The first controller is
When the change in the position of the right eye and the left eye is detected, and the distance between the display device and the position of the right eye and the left eye is within a predetermined range, before and after the change in the position of the right eye and the left eye Setting the unit region to one of the transmission state and the blocking state so that the light transmittance of the plurality of unit regions is constant;
The display device according to any one of claims 1 to 3. The input information related to the user's position is information indicating a position related to the user's face.
The display device according to any one of claims 1 to 5. The input information related to the position of the user is information indicating the positions of the left eye and the right eye of the user.
The display device according to any one of claims 1 to 5. Determining pixel display of pixels of the right-eye image and pixels of the left-eye image displayed on the display unit according to the positions of the left eye and right eye of the user;
The display device according to claim 7. A display for displaying an image;
An illumination unit for irradiating the display unit with light;
A parallax adjustment unit having a plurality of unit regions;
The plurality of unit areas included in the parallax adjustment unit are set to one of a transmission state that transmits light from the illumination unit and a blocking state that blocks the light according to input information related to a user's position. A first control unit;
A second control unit for acquiring input information relating to the position of the user;
Including
The first control unit acquires input information related to the position of the user from the second control unit, and within a predetermined time after the unit region starts transition from the transmission state to the blocking state. Turning off the illumination unit;
Display system.

Images