Display system

Abstract

To provide a display system in which mosaic arrangement is applied to arrangement of sub-pixels, inhibiting a user from visually recognizing the arrangement of the sub-pixels in a fringe pattern.SOLUTION: A display system 1 comprises: an installation part 2 mounted on the head of a user with both eyes of the user being covered; two display devices 5 including a display area DA where a plurality of sub-pixels S is arrayed in matrix; and a drive circuit 11 outputting sub-pixel signals to the sub-pixels S by column inversion drive method. In the display area DA, a plurality of first sub-pixels Sα, a plurality of second sub-pixels Sβ, and a plurality of third sub-pixels Sγ are continuously arrayed along an inclination direction D3 inclined to a row direction D1 and to a column direction D2. The two display devices 5 include a plurality of signal lines Lb extending along the column direction D2 and transferring the sub-pixel signals to the plurality of sub-pixels S. The column direction D2 of a first display device 5a, the inclination direction D3 of the first display device 5a, the column direction D2 of a second display device 5b, and the inclination direction D3 of the second display device 5b are different to each other.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to display systems. [Background technology]

[0002] Patent Documents 1, 2 and 3 disclose virtual image display devices that are applied to display systems such as head mounted displays (hereinafter sometimes referred to as HMDs). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-53152 [Patent Document 2] Japanese Patent Application Publication No. 2019-148626 [Patent Document 3] Japanese Patent Application Publication No. 2019-148627 Summary of the Invention [Problem to be solved by the invention]

[0004] An HMD includes a display panel that displays images. When the display panel is a transmissive liquid crystal display, a plurality of sub-pixels each having a color filter are arranged in the display area of ​​the display panel that displays the image. In an HMD, a mosaic arrangement of the sub-pixels may be used, which produces images with higher resolution than a stripe arrangement.

[0005] In addition, in an HMD, the display area of ​​the display panel that displays images is located directly in front of the user, meaning the distance between the user's eyes and the display area is relatively short. This can cause a phenomenon known as the screen door effect, in which the user perceives the sub-pixel arrangement as a mesh or striped pattern.

[0006] In addition, in a display panel, a plurality of signal lines for transmitting signals for displaying an image in a display area are arranged along the array of sub-pixels and are aligned parallel to each other. When signals for displaying an image are output using a column inversion driving method in which the polarity of the signals is periodically inverted, the luminance of the sub-pixels periodically changes depending on the polarity of the signals, which may cause a phenomenon in which a user perceives the array of sub-pixels as a striped pattern.

[0007] The present disclosure aims to prevent a user from visually recognizing the sub-pixel arrangement as a striped pattern in a display system in which a mosaic arrangement is applied to the sub-pixel arrangement. [Means for solving the problem]

[0008] A display system according to the present disclosure includes a mounting unit that is mounted on a user's head so as to cover both of the user's eyes, two display devices each having a display area in which a plurality of subpixels are arranged in a matrix, and a drive circuit that outputs subpixel signals to display an image in the display area, wherein the plurality of subpixels include a plurality of first subpixels, a plurality of second subpixels, and a plurality of third subpixels that are different in color, and in the display area, the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels are arranged in a row direction such that the first subpixel, the second subpixel, and the third subpixel are repeated in this order, and in a column direction such that the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels are arranged at an inclination that is inclined with respect to the row direction and the column direction, respectively. The two display devices are arranged consecutively along a diagonal direction, and the two display devices have a plurality of signal lines extending along the column direction and transmitting the sub-pixel signals to the plurality of sub-pixels. The two display devices are arranged such that the display area of ​​a first display device faces one of the user's eyes and the display area of ​​a second display device faces the other of the user's eyes. The two display devices are arranged on the mounting part such that the column direction of the first display device, the tilt direction of the first display device, the column direction of the second display device, and the tilt direction of the second display device are different from each other. The drive circuit outputs the sub-pixel signals using a column inversion drive method in which the polarities of the sub-pixel signals are different on two of the signal lines adjacent to each other in the row direction and the polarities of the sub-pixel signals are periodically inverted. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a display system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a schematic diagram showing the configuration of the display system. [Figure 3] FIG. 3 is a diagram showing the arrangement of the display device in the mounting portion. [Figure 4]FIG. 4 is a diagram showing the configuration of the display device. [Figure 5] FIG. 5 is a side view of the display device. [Figure 6] FIG. 6 is a diagram showing the circuit configuration of the display panel. [Figure 7] FIG. 7 is a cross-sectional view of the display panel. [Figure 8] FIG. 8 is a plan view of a display area of ​​a display device, showing an arrangement of a plurality of sub-pixels in the display area. [Figure 9] FIG. 9 is a diagram showing the X1 direction, the Y1 direction, the column direction of the first display device, the tilt direction of the first display device, the column direction of the second display device, and the tilt direction of the second display device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Each embodiment of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to the contents described in the following embodiments. Furthermore, the components described below include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate.

[0011] It should be noted that the disclosure is merely an example, and appropriate modifications that a person skilled in the art can easily conceive of while maintaining the gist of the present disclosure are naturally included within the scope of the present disclosure. Furthermore, in order to clarify the explanation, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment, but these are merely examples and do not limit the interpretation of the present disclosure. Furthermore, in this specification and each drawing, elements similar to those described above with respect to the previous drawings may be given the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0012] Fig. 1 is a perspective view of a display system 1 according to an embodiment of the present disclosure. Fig. 2 is a schematic diagram showing a configuration of the display system 1. The display system 1 is, for example, a head-mounted display. The display system 1 displays images such as computer graphic images and 360-degree live-action images.

[0013] The display system 1 includes a mounting unit 2 , a video signal source 3 , two lenses 4 , and a display device 5 .

[0014] The X1 direction (corresponding to the "arrangement direction"), Y1 direction (corresponding to the "orthogonal direction"), and Z1 direction shown in the drawings are perpendicular to each other and indicate the directions of the main body 2a of the mounting unit 2. The X1 direction, Y1 direction, and Z1 direction correspond to the width direction, height direction, and thickness direction of the main body 2a. The X1 direction, Y1 direction, and Z1 direction are merely examples, and the present disclosure is not limited to these directions. Furthermore, in this specification, the side indicated by an arrow representing a direction shown in the drawings is the + side of that direction, and the side opposite to the arrow is the - side. Hereinafter, for example, the side indicated by the arrow in the Z1 direction is referred to as the +Z1 side, and the opposite side is referred to as the -Z1 side.

[0015] The wearing unit 2 is, for example, a headset, goggles, a helmet, or a mask. The wearing unit 2 includes a main body 2a and a belt 2b. A video signal source 3, two lenses 4, and a display device 5 are arranged in the main body 2a. The belt 2b is wrapped around the user's head to secure the main body 2a to the user's head. The wearing unit 2 is worn on the user's head with the main body 2a covering both of the user's eyes.

[0016] The video signal source 3 outputs an image signal containing image information to the display device 5. The image signal includes two different images that utilize the parallax between the user's eyes. The two images are an image for the user's right eye and an image for the user's left eye. The video signal source 3 outputs images that have been pre-stored inside to the display device 5. The video signal source 3 includes, for example, an HDD (Hard disk drive) and a flash memory. Note that the video signal source 3 may be external to the mounting unit 2. In this case, the video signal source 3 is a computer (e.g., a server) electrically connected to the display device 5 via a wired or wireless connection.

[0017] The two lenses 4 are positioned opposite the user's eyes E. The lenses 4 are, for example, convex lenses made of glass. The two lenses 4 correspond to the user's eyes. The lenses 4 are positioned between the display device 5 and the user's eyes E. Due to the lens action of the lenses 4, light emitted from the display device 5 is focused on the user's eyes E. The user views an enlarged image of the image displayed on the display device 5.

[0018] The display device 5 is disposed on the opposite side of the user's eyes E, with the two lenses 4 interposed therebetween.

[0019] 3 is a diagram showing the arrangement of the display devices 5 in the mounting unit 2. The display system 1 includes two display devices 5. That is, the display system 1 includes a first display device 5a and a second display device 5b. The first display device 5a and the second display device 5b have the same configuration.

[0020] The first display device 5a acquires an image for the left eye from the video signal source 3. The display area DA of the first display device 5a faces the left eye of the user and displays the image for the left eye. The second display device 5b acquires an image for the right eye from the video signal source 3. The display area DA of the second display device 5b faces the right eye of the user and displays the image for the right eye. The display area DA is planar. The display area DA of the first display device 5a and the display area DA of the second display device 5b are located on the same plane perpendicular to the Z1 direction.

[0021] By arranging the first display device 5a and the second display device 5b in this manner, the direction in which the display area DA of the first display device 5a and the display area DA of the second display device 5b are aligned corresponds to the left-right direction of the user's eyes. Also, the direction in which the display area DA of the first display device 5a and the display area DA of the second display device 5b are aligned corresponds to the left-right direction of the main body 2a, i.e., the X1 direction.

[0022] 3, arrows are shown indicating the orientations of the first display device 5a and the second display device 5b (details will be described later). Hereinafter, when the first display device 5a and the second display device 5b are described without distinction, they will be simply referred to as "display device 5."

[0023] 4 is a diagram showing the configuration of the display device 5. FIG. 5 is a side view of the display device 5.

[0024] Hereinafter, the X2, Y2, and Z2 directions shown in the drawings are perpendicular to one another and represent directions of the display device 5. The X2 and Y2 directions correspond to directions parallel to the main surfaces of the substrates included in the display device 5. The Z2 direction corresponds to a direction perpendicular to the main surfaces of the substrates included in the display device 5. The Z2 direction corresponds to the thickness direction of the first display device 5a, and the side indicated by the arrow in the Z2 direction (+Z2 side) corresponds to the front side where an image is displayed on the first display device 5a, and the opposite side (-Z2 side) corresponds to the back side of the first display device 5a. Viewing the display device 5 along the Z2 direction is referred to as a "planar view." Note that the X2, Y2, and Z2 directions are merely examples, and the present disclosure is not limited to these directions.

[0025] The display device 5 includes a display panel 10 and an illumination device 20. The display panel 10 is a transmissive liquid crystal display.

[0026] The front surface of the display panel 10 has a display area DA where an image is displayed. The front surface of the display panel 10 is perpendicular to the Z2 direction. The display area DA has a polygonal shape in a plan view, but may also have a rectangular shape.

[0027] In the display area DA, a plurality of sub-pixels S are arranged in a matrix. In a plan view, the sub-pixels S are arranged in a matrix along a row direction D1 and a column direction D2. The row direction D1 and the column direction D2 are perpendicular to each other. The row direction D1 is parallel to the X2 direction. The column direction D2 is parallel to the Y2 direction. Note that the row direction D1 may be inclined with respect to the X2 direction. Details of the sub-pixels S will be described later.

[0028] The illumination device 20 is disposed on the rear side of the display panel 10 and emits light toward the display panel 10. The illumination device 20 is a so-called direct type backlight. The illumination device 20 includes, for example, a plurality of light emitting diodes.

[0029] 6 is a diagram showing the circuit configuration of the display panel 10. The display panel 10 includes a drive circuit 11, and a plurality of subpixels S each having a switching element SW, a subpixel electrode PE, a common electrode CE, a liquid crystal capacitance LC, and a storage capacitance CS.

[0030] The drive circuit 11 displays an image in the display area DA. The drive circuit 11 includes a signal processing circuit 11a, a signal output circuit 11b, and a scanning circuit 11c.

[0031] The signal processing circuit 11a generates a plurality of sub-pixel signals (described later) based on an image signal transmitted from the video signal source 3, and outputs the generated sub-pixel signals to the signal output circuit 11b. The signal processing circuit 11a also outputs a clock signal to the signal output circuit 11b and the scanning circuit 11c, which synchronizes the operation of the signal output circuit 11b with the operation of the scanning circuit 11c.

[0032] The signal output circuit 11b outputs the subpixel signals to the corresponding subpixels S. The signal output circuit 11b and the subpixels S are electrically connected via signal lines Lb extending in the column direction D2. That is, the signal lines Lb extend in the column direction D2 and transmit the subpixel signals to the subpixels S.

[0033] In addition, the signal output circuit 11b outputs the sub-pixel signals by a column inversion driving method in which the polarities of the sub-pixel signals are different between two signal lines Lb adjacent to each other in the row direction D1 and the polarities of the sub-pixel signals are inverted periodically (for example, every frame).

[0034] The scanning circuit 11c scans the sub-pixels S in synchronization with the output of the sub-pixel signals by the signal output circuit 11b. The scanning circuit 11c and the sub-pixels S are electrically connected via a plurality of scanning lines Lc extending along the row direction D1.

[0035] In plan view, a region defined by two signal lines Lb adjacent to each other in the row direction D1 and two scanning lines Lc adjacent to each other in the column direction D2 corresponds to one sub-pixel S.

[0036] The switching element SW is configured by, for example, a thin film transistor (TFT). In the switching element SW, the source electrode and the signal line Lb are electrically connected, and the gate electrode and the scanning line Lc are electrically connected.

[0037] The subpixel electrode PE is connected to the drain electrode of the switching element SW. The common electrode CE is disposed corresponding to the subpixel electrode PE. The subpixel electrode PE and the common electrode CE are light-transmitting.

[0038] The liquid crystal capacitance LC is a capacitance component of the liquid crystal material of the liquid crystal layer 13, which will be described later, located between the subpixel electrode PE and the common electrode CE. The storage capacitance CS is disposed between an electrode having the same potential as the common electrode CE and an electrode having the same potential as the subpixel electrode PE.

[0039] 7 is a cross-sectional view of the display panel 10. The display panel 10 includes a first substrate 12, a liquid crystal layer 13, and a second substrate .

[0040] The first substrate 12, the liquid crystal layer 13, and the second substrate 14 are each light-transmitting and are arranged in this order along the Z2 direction from the negative side to the positive side of the Z2 direction. An IC chip Ti that constitutes the drive circuit 11 is arranged on the first substrate 12 (FIGS. 4 and 5).

[0041] Signal lines Lb and scanning lines Lc (not shown in FIG. 7) are arranged on a main surface 12a, which corresponds to the front surface of the first substrate 12. Color filters CF are also arranged on the main surface 12a of the first substrate 12. Each color filter CF has a rectangular shape in a plan view, and is arranged for each of the plurality of sub-pixels S.

[0042] The color filter CF is translucent and has a predetermined spectral peak for the light it transmits. The spectral peak is one of three spectral peaks corresponding to three different colors. The three colors are red, green, and blue, but the number and types of colors are not limited to these. Hereinafter, the color corresponding to the spectral peak of the light transmitted by the color filter CF will be referred to as the color of the color filter CF. The color of the color filter CF corresponds to the color of the subpixel S.

[0043] Furthermore, on the first substrate 12, a subpixel electrode PE is arranged on the +Z2 side in the Z2 direction from the color filter CF and the signal line Lb, with an insulating layer IL1 interposed therebetween. The subpixel electrode PE overlaps with the color filter CF in the Z2 direction.

[0044] Furthermore, on the first substrate 12, a light-shielding film SM, a common electrode CE, and an alignment film AL are arranged on the +Z2 side in the Z2 direction from the subpixel electrode PE, with an insulating layer IL2 interposed therebetween.

[0045] The light-shielding film SM has light-shielding properties. The light-shielding film SM overlaps with the signal line Lb and the scanning line Lc in the Z2 direction. That is, the light-shielding film SM partitions a plurality of sub-pixels S. In other words, the light-shielding film SM overlaps with the boundary between two sub-pixels S adjacent to each other in the row direction D1 and the column direction D2 in the Z2 direction.

[0046] The common electrode CE is stacked on the light-shielding film SM, has a slit SL, and is arranged so as to straddle two sub-pixel electrodes PE that are adjacent to each other in a plan view. In this manner, the common electrode CE and the sub-pixel electrode PE are arranged on the first substrate 12. In other words, the display panel 10 is a lateral electric field liquid crystal display.

[0047] The liquid crystal layer 13 includes a plurality of liquid crystal molecules LM. The liquid crystal layer 13 is located between two alignment films AL facing each other in the Z2 direction. The orientation of the liquid crystal molecules LM is regulated by the two alignment films AL. The alignment film AL is disposed on the rear surface side of the second substrate 14.

[0048] The display panel 10 further includes a first polarizing plate 15 disposed on the rear side of the first substrate 12, and a second polarizing plate 16 disposed on the front side of the second substrate .

[0049] The first polarizer 15 has a transmission axis perpendicular to the Z2 direction. The second polarizer 16 has a transmission axis perpendicular to the transmission axis of the first polarizer 15 and the Z2 direction.

[0050] Next, a description will be given of the operation of the display device 5 when an image is displayed in the display area DA. When the display device 5 receives an image signal transmitted from the video signal source 3, it displays an image in the display area DA.

[0051] The image signal includes the gradation of the sub-pixel S corresponding to the image. The drive circuit 11 generates a sub-pixel signal indicating the gradation of the sub-pixel S and outputs the sub-pixel signal to the sub-pixel S. As a result, a voltage according to the gradation indicated by the sub-pixel signal is applied to the liquid crystal layer 13 corresponding to the sub-pixel S, causing the liquid crystal molecules LM to tilt. The degree of tilt of the liquid crystal molecules LM changes according to the gradation indicated by the sub-pixel signal.

[0052] Light from the illumination device 20 is incident on the display panel 10. The light that has entered the display panel 10 is colored by passing through the color filter CF and then enters the liquid crystal layer 13. Due to the tilt of the liquid crystal molecules LM, the light that passes through the liquid crystal layer 13 is modulated to the grayscale indicated by the sub-pixel signal. Furthermore, the light that has passed through the liquid crystal layer 13 is emitted from the display panel 10. As a result, an image is displayed in the display area DA.

[0053] Next, the arrangement of the sub-pixels S in the display area DA will be described.

[0054] 8 is a plan view of the display area DA of the display device 5, showing the arrangement of multiple subpixels S in the display area DA. The multiple subpixels S shown in FIG. 8 are a part of the multiple subpixels S arranged in the display area DA. The multiple subpixels S shown in FIG. 8 are represented by color filters CF and light-shielding films SM. In plan view, the multiple subpixels S are partitioned by the light-shielding films SM, and the color filters CF are rectangular.

[0055] The sub-pixels S have the same rectangular shape in plan view. As described above, the sub-pixels S are arranged in a matrix along the row direction D1 and the column direction D2 in plan view.

[0056] Hereinafter, in a plan view, the distance between the center points C of two subpixels S adjacent to each other in the row direction D1 among the plurality of subpixels S will be referred to as the first pitch P1, and the distance between the center points C of two subpixels S adjacent to each other in the column direction D2 among the plurality of subpixels S will be referred to as the second pitch P2. In this embodiment, the ratio of the second pitch P2 to the first pitch P1 is 4 / 3. Note that the ratio of the second pitch P2 to the first pitch P1 may also be 2. The ratio of the second pitch P2 to the first pitch P1 may be any value as long as it is equal to or greater than 4 / 3 and less than 3.

[0057] The multiple subpixels S include multiple first subpixels Sα, multiple second subpixels Sβ, and multiple third subpixels Sγ. The first subpixels Sα, the second subpixels Sβ, and the third subpixels Sγ have different colors of color filters CF, i.e., different colors of subpixels S. The color of the first subpixel Sα is red. The color of the second subpixel Sβ is green. The color of the third subpixel Sγ is blue. In other words, the first subpixel Sα is a red subpixel S. The second subpixel Sβ is a green subpixel S. The third subpixel Sγ is a blue subpixel S. Needless to say, the colors of the subpixels S are not limited to these.

[0058] Hereinafter, when the first subpixel Sα, the second subpixel Sβ, and the third subpixel Sγ are not to be distinguished from one another, they may be simply referred to as "subpixel S."

[0059] In the display region DA, the plurality of first subpixels Sα, the plurality of second subpixels Sβ, and the plurality of third subpixels Sγ are arranged as shown in Fig. 8. The arrangement of the subpixels S shown in Fig. 8 is a so-called mosaic arrangement. Specifically, in a plan view, the first subpixels Sα, the second subpixels Sβ, and the third subpixels Sγ are repeatedly arranged in this order along the row direction D1 from the -D1 side (the side opposite to the side indicated by the arrow) to the +D1 side (the side indicated by the arrow) of the row direction D1, and the first subpixels Sα, the second subpixels Sβ, and the third subpixels Sγ are repeatedly arranged in this order along the column direction D2 from the -D2 side (the side opposite to the side indicated by the arrow) to the +D2 side (the side indicated by the arrow) of the column direction D2.

[0060] In the mosaic array shown in Fig. 8, subpixels S of the same color are successively arranged along a tilt direction D3 that is tilted with respect to the row direction D1 and the column direction D2 in a plan view. That is, in a plan view, a plurality of first subpixels Sα, a plurality of second subpixels Sβ, and a plurality of third subpixels Sγ are successively arranged along the tilt direction D3. The tilt direction D3 is the direction in which an imaginary line extends that passes through the center points C of adjacent subpixels S of the same color. The imaginary line L1 shown in Fig. 8 is an imaginary line that passes through the center points C of adjacent first red subpixels Sα.

[0061] In a stripe array, which is one type of array of subpixels S, the first subpixel Sα, the second subpixel Sβ, and the third subpixel Sγ are repeatedly arranged in this order along the row direction D1 from the −D1 side to the +D1 side of the row direction D1, and subpixels S of the same color are arranged consecutively in the column direction D2. In addition, in the stripe array, the ratio of the second pitch P2 to the first pitch P1 is 3. Therefore, this ratio is smaller in the mosaic array than in the stripe array. Therefore, the mosaic array can obtain a finer image than the stripe array.

[0062] As described above, when the mounting unit 2 is mounted on the user's head so as to cover both eyes, the display area DA and the distance between the display area DA and the user's eyes are relatively short. In this case, a phenomenon in which the user sees the arrangement of the sub-pixels S as a mesh pattern or striped pattern (the so-called screen door effect (hereinafter sometimes referred to as SDE)) may occur.

[0063] For example, when only red is displayed in the display area DA, the luminance of the first red subpixel Sα is greater than zero, and the luminance of the second green subpixel Sβ and the third blue subpixel Sγ is zero. Therefore, the first subpixel Sα displays red, and the second subpixel Sβ and the third subpixel Sγ display black. Furthermore, in the display area DA, as described above, the first subpixels Sα, the second subpixels Sβ, and the third subpixels Sγ are each consecutively arranged along the inclination direction D3. In this case, an SDE may occur, in which the user visually perceives a striped pattern of alternating red and black columns along the inclination direction D3.

[0064] As described above, the first display device 5a and the second display device 5b are aligned along the X1 direction. In this case, if the tilt direction D3 of the first display device 5a and the tilt direction D3 of the second display device 5b overlap, the striped pattern along the tilt direction D3 is emphasized, increasing the likelihood that the user will be able to see the striped pattern.

[0065] As described above, the drive circuit 11 outputs subpixel signals using a column inversion drive method in which the polarities of the subpixel signals are different between two adjacent signal lines Lb in the row direction D1 and the polarities of the subpixel signals are periodically inverted. The signal lines Lb extend in the column direction D2. Therefore, in this case, the polarities of the subpixel signals corresponding to the subpixels S aligned in the column direction D2 are the same, and the polarities of the subpixel signals corresponding to two adjacent subpixels S in the row direction D1 are different.

[0066] 8, when the polarity of the subpixel signals corresponding to the subpixels S in the column closest to -D1 is positive (+), the polarity of the subpixel signals corresponding to the subpixels S in the adjacent column is negative (-). In other words, the polarities of the subpixel signals corresponding to the subpixels S are the same in the column direction D2, and positive and negative polarities alternate in the row direction D1.

[0067] Furthermore, the luminance of a subpixel S corresponding to a subpixel signal with a positive polarity may differ from the luminance of a subpixel S corresponding to a subpixel signal with a negative polarity. Therefore, the luminance of the subpixels S is the same in the column direction D2, and subpixels S with different luminances are arranged alternately in the row direction D1. In this case, the difference in luminance of the subpixels S due to the column inversion drive method may cause stripes to appear along the column direction D2, which may be visible to the user.

[0068] As described above, the first display device 5a and the second display device 5b are aligned in the X1 direction. In this case, if the column direction D2 of the first display device 5a overlaps with the column direction D2 of the second display device 5b, the striped pattern along the column direction D2 is emphasized, increasing the likelihood that the user will be able to see the striped pattern.

[0069] Furthermore, when the tilt direction D3 of the first display device 5a overlaps with the column direction D2 of the second display device 5b, the stripes along the tilt direction D3 and the column direction D2 are emphasized, increasing the likelihood that the user will be able to see the stripes. This also applies when the column direction D2 of the first display device 5a overlaps with the tilt direction D3 of the second display device 5b.

[0070] Therefore, as shown in Figure 3, the two display devices 5 are arranged in the mounting section 2 in a state where the column direction D2 of the first display device 5a, the inclination direction D3 of the first display device 5a, the column direction D2 of the second display device 5b, and the inclination direction D3 of the second display device 5b are in different directions.

[0071] 9 is a diagram showing the X1 direction, the Y1 direction, the column direction D2 of the first display device 5a, the tilt direction D3 of the first display device 5a, the column direction D2 of the second display device 5b, and the tilt direction D3 of the second display device 5b. Note that in FIG. 9, the symbols corresponding to the first display device 5a are marked with "(5a)", and the symbols corresponding to the second display device 5b are marked with "(5b)".

[0072] In this embodiment, in a plan view, a first angle θ1 formed between the Y1 direction, which is orthogonal to the X1 direction in which the two display devices 5 are aligned, and the column direction D2 of the first display device 5a, and a second angle θ2 formed between the Y1 direction and the column direction D2 of the second display device 5b are equal. In other words, the two display devices 5 are arranged such that the column direction D2 of the first display device 5a and the column direction D2 of the second display device 5b are line-symmetrical with respect to a virtual line L2 (see FIG. 3) along the Y1 direction.

[0073] In this embodiment, the column direction D2 of the first display device 5a and the column direction D2 of the second display device 5b are perpendicular to each other, that is, the first angle θ1 and the second angle θ2 are 45°.

[0074] When the ratio of the second pitch P2 to the first pitch P1 of the subpixels S is 4 / 3 as described above, the third angle θ3 between the column direction D2 and the inclination direction D3 is 36.8° in each of the first display device 5a and the second display device 5b.

[0075] Furthermore, when the column direction D2 of the first display device 5a and the column direction D2 of the second display device 5b are perpendicular to each other, the fourth angle θ4 formed by the inclination direction D3 of the first display device 5a and the column direction D2 of the second display device 5b is 53.2°.

[0076] In this way, when the column direction D2 of the first display device 5a, the tilt direction D3 of the first display device 5a, the column direction D2 of the second display device 5b, and the tilt direction D3 of the second display device 5b are different from one another, the direction of the stripe pattern caused by the SDE (tilt direction D3) and the direction of the stripe pattern caused by the column inversion drive method (column direction D2) do not overlap in the two display devices 5. In other words, the stripe pattern along the tilt direction D3 and the stripe pattern along the column direction D2 are not emphasized. Therefore, in a display system 1 in which a mosaic arrangement is applied to the arrangement of the subpixels S, it is possible to prevent a user from viewing the arrangement of the subpixels S as a stripe pattern.

[0077] When the subpixels S are arranged in a stripe array, the direction of the stripe pattern caused by the SDE is the column direction D2. In this case, the direction in which the signal lines Lb extend in each of the two display devices 5 coincides with the column direction D2 of the subpixels S. Therefore, regardless of the orientation in which the display devices 5 are arranged, the direction of the stripe pattern caused by the SDE (column direction D2) coincides with the direction of the stripe pattern caused by the column inversion drive system (column direction D2) in each of the two display devices 5. Therefore, when the subpixels S are arranged in a mosaic array as in this embodiment, the user can be less likely to see the stripe pattern than when the subpixels S are arranged in a stripe array.

[0078] Although preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to such embodiments. The contents disclosed in the embodiments are merely examples, and various modifications are possible within the scope of the present disclosure. Appropriate modifications made within the scope of the present disclosure also naturally fall within the technical scope of the present disclosure.

[0079] For example, in the above embodiment, the fifth angle θ5 between the column direction D2 of the first display device 5a and the column direction D2 of the second display device 5b is 90°. However, the fifth angle θ5 may be smaller than 90°. In this case, it is desirable to determine the first angle θ1 and the second angle θ2 so that the fifth angle θ5 is 60° or more and 90° or less. When the ratio of the second pitch P2 to the first pitch P1 of the subpixels S is 4 / 3 as in the above embodiment, comparing the cases where the fifth angle θ5 is 0°, 30°, 60°, and 90°, it was confirmed that a striped pattern is not visible when the fifth angle θ5 is 60° and 90°. Note that when the ratio of the second pitch P2 to the first pitch P1 of the subpixels S is 4 / 3 as in the above embodiment, when the fifth angle θ5 is 60° or more and 90° or less, the fourth angle θ4 is 23.2° or more and 53.2° or less. On the other hand, when the fifth angle θ5 is smaller than 60°, the fourth angle θ4 is smaller than 23.2°, and the tilt direction D3 of the first display device 5a and the column direction D2 of the second display device 5b become closer to each other.

[0080] Furthermore, the first angle θ1 and the second angle θ2 may be different from each other. That is, the column direction D2 of the first display device 5a and the column direction D2 of the second display device 5b do not have to be line-symmetric.

[0081] Furthermore, the row direction D1 may be inclined with respect to the X2 direction. In this case, the column direction D2 is inclined with respect to the Y2 direction. Furthermore, the angle between the column direction D2 and the Y2 direction in the first display device 5a and the angle between the column direction D2 and the Y2 direction in the second display device 5b may be different from each other. Furthermore, the row direction D1 and the column direction D2 may be inclined and not perpendicular to each other.

[0082] The display panel 10 may also be a vertical electric field type liquid crystal display in which a common electrode CE is disposed on the second substrate 14 so as to face the plurality of subpixel electrodes PE. The display panel 10 may also be a reflective liquid crystal display.

[0083] Furthermore, other effects and advantages brought about by the aspects described in this embodiment that are clear from the description in this specification or that can be appropriately thought of by a person skilled in the art are naturally understood to be brought about by the present disclosure. [Explanation of symbols]

[0084] 1 Display System 2 Mounting part 5 Display device 5a First display device 5b Second display device 10 Display panel 11 Drive circuit D1 row direction D2 column direction D3 Inclination direction DA display area Lb signal line P1 First pitch P2 2nd pitch S subpixel Sα 1st subpixel Sβ Second subpixel Sγ 3rd subpixel θ1 1st angle θ2 2nd angle

Claims

1. a mounting part that is mounted on the user's head in a state that covers both of the user's eyes; two display devices each having a display area in which a plurality of sub-pixels are arranged in a matrix; a drive circuit that outputs sub-pixel signals that cause an image to be displayed in the display area; the plurality of sub-pixels include a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels that are different in color from one another; In the display area, the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels are arranged in a state in which the first subpixel, the second subpixel, and the third subpixel are repeated in this order along the row direction, and the first subpixel, the second subpixel, and the third subpixel are arranged in a state in which the first subpixel, the second subpixel, and the third subpixel are repeated in this order along the column direction; the plurality of first subpixels, the plurality of second subpixels, and the plurality of third subpixels are successively arranged along an oblique direction that is oblique with respect to the row direction and the column direction, The two display devices are: a plurality of signal lines extending along the column direction and transmitting the sub-pixel signals to the plurality of sub-pixels; the two display devices are arranged in a state in which the display area of ​​a first display device faces one of the user's eyes, and the display area of ​​a second display device faces the other of the user's eyes; the first display device is placed on the mounting portion in a state in which the column direction of the first display device, the tilt direction of the first display device, the column direction of the second display device, and the tilt direction of the second display device are different from each other; the drive circuit outputs the sub-pixel signals by a column inversion drive method in which the polarities of the sub-pixel signals are different between two of the signal lines adjacent to each other in the row direction and the polarities of the sub-pixel signals are periodically inverted. Display system.

2. In a plan view, a first angle formed between an orthogonal direction orthogonal to an arrangement direction in which the two display devices are arranged and the column direction of the first display device is equal to a second angle formed between the orthogonal direction and the column direction of the second display device. The display system of claim 1 .

3. a ratio of a first pitch between two subpixels adjacent to each other in the row direction among the plurality of subpixels to a second pitch between two subpixels adjacent to each other in the column direction in a plan view is equal to or greater than 4 / 3 and less than 3; The display system of claim 1 .

4. the first subpixel is a red subpixel, the second subpixel is a green subpixel, the third subpixel is a blue subpixel; The display system of claim 1 .

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