JP2024086747A - Display device and electronic apparatus - Google Patents

Abstract

To provide a display device that can achieve both a reduction in size of an electronic apparatus and higher quality of a displayed image.SOLUTION: A display device 80 includes: a first light-emitting element 830; a second light-emitting element 830; a first color filter 840 where light from the first light-emitting element 830 passes through; and a second color filter 840 where light from the second light-emitting element 830 passes through. The positional relation between the center of the first light-emitting element 830 and the center of the first color filter 840 is different from the positional relation between the center of the second light-emitting element 830 and the center of the second color filter 840. As the color filter 840 is disposed by aligning to an optical axis of the light-emitting element 830, the angle of view can be broadened while size of the light-emitting element 830 is maintained to a certain degree, and thereby, picture quality of a displayed image and reduction in size of the electronic apparatus can be both achieved.SELECTED DRAWING: Figure 4

Description

The present invention relates to a display device and an electronic device.

In recent years, a type of head-mounted display that directs image light from a display element to the observer's pupils has been proposed as a virtual image display device that enables the formation and observation of virtual images like a head-mounted display. Such virtual image display devices employ a see-through optical system that superimposes image light and external light, as described in Patent Document 1.

JP 2013-200553 A

However, the virtual image display device described in Patent Document 1 has an issue in that it is difficult to achieve both high image quality of the displayed image and miniaturization of electronic devices such as head-mounted displays. This is because with conventional virtual image display devices, making the displayed image brighter and increasing the resolution results in a larger display device. In other words, it has been difficult to realize a display device that is lightweight and small enough not to cause discomfort to the user when applied to electronic devices, and that displays high-quality images.

The present invention has been made to solve at least some of the above problems, and can be realized in the following forms or application examples.

(Application Example 1)
The display device according to this application example comprises a first light-emitting element, a second light-emitting element, a first color filter through which light from the first light-emitting element passes, and a second color filter through which light from the second light-emitting element passes, and is characterized in that the relative positional relationship between the center of the first light-emitting element and the center of the first color filter in a planar view is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter in a planar view.
With this configuration, the color filter is aligned with the optical axis of the light emitting element, so the angle of view can be widened while maintaining the size of the light emitting element to a certain extent, thereby achieving both high image quality of the displayed image and miniaturization of electronic devices such as head mounted displays.

(Application Example 2)
In the display device described in the above Application Example 1, it is preferable that the first light-emitting element, the first color filter, the second light-emitting element, and the second color filter are arranged in the display area, the optical axis from the first light-emitting element is inclined toward the center of the display area from the normal to the first light-emitting element, and the center of the first color filter in a planar view is shifted toward the center of the display area more than the center of the first light-emitting element in a planar view.
In a display device of an electronic device such as a head mounted display having a light collecting optical system, the optical axis from the light emitting element is inclined toward the center of the display area except for the central part of the display area. Therefore, with this configuration, the color filter is arranged offset toward the center with respect to the light emitting element, so that the angle of view can be widened while maintaining the size of the light emitting element to a certain extent. In other words, it is possible to achieve both miniaturization of an electronic device such as a head mounted display having a light collecting optical system and high quality of the image displayed on the electronic device.

(Application Example 3)
In the display device described in the above Application Example 2, the second light-emitting element and the second color filter are arranged inside the first light-emitting element and the first color filter within the display area, and when the amount of deviation between the center of the first light-emitting element and the center of the first color filter in a planar view is defined as a first deviation amount and the amount of deviation between the center of the second light-emitting element and the center of the second color filter in a planar view is defined as a second deviation amount, it is preferable that the second deviation amount is smaller than the first deviation amount.
In a display device of an electronic device such as a head mounted display having a light collecting optical system, the inclination of the optical axis from the light emitting element increases toward the outside of the display area. With this configuration, the amount of misalignment between the light emitting element and the color filter is adjusted according to the position of the light emitting element within the display area, so that the angle of view can be widened while maintaining the size of the light emitting element to a certain extent. In other words, it is possible to achieve both miniaturization of an electronic device such as a head mounted display having a light collecting optical system and high quality of the image displayed on the electronic device.

(Application Example 4)
In the display device described in the above Application Example 3, it is preferable that the display device further comprises a separation section that separates the color filters, and the difference between the first shift amount and the second shift amount is brought about by the width of the separation section arranged between the first color filter and the second color filter.
With this configuration, the positional relationship between the light emitting element and the color filter can be easily adjusted simply by changing the width of the separation portion.

(Application Example 5)
In the display device described in the above Application Example 3, it is preferable that the color filters include a red color filter, a green color filter, and a blue color filter, and the difference between the first shift amount and the second shift amount is brought about by the width of a separation portion that is disposed between the first color filter and the second color filter and separates the red color filter and the blue color filter.
Human visibility is high for green. Therefore, with this configuration, the difference in the amount of shift is created while avoiding the green color filter, which has high visibility, so that the possibility of the user not noticing the presence of the separation part that creates the difference can be reduced.

(Application Example 6)
In the display device described in Application Example 4 or 5 above, the light-emitting elements and color filters are arranged in a matrix in the display area, and it is preferable that the row-direction position of the separation section that creates the difference between the first shift amount and the second shift amount is different between the first row and the second row adjacent to the first row.
With this configuration, the separation parts having different widths are not arranged in a row, which reduces the possibility that the user will notice the presence of the separation parts that create the differences.

(Application Example 7)
In the display device described in the above Application Example 3, it is preferable that the difference between the first shift amount and the second shift amount is brought about by the width of another color filter arranged between the first color filter and the second color filter.
With this configuration, the positional relationship between the light emitting element and the color filter can be easily adjusted simply by changing the width of the color filter.

(Application Example 8)
In the display device according to the seventh aspect, the color filters include a red color filter, a green color filter and a blue color filter, and the other color filter is preferably a blue color filter.
Human visibility is low for blue. Therefore, with this configuration, a blue color filter with low visibility is used to create a difference in the amount of shift, which reduces the possibility that the user will notice the presence of the color filter that is creating the difference.

(Application Example 9)
In the display device described in Application Example 7 or 8 above, the light-emitting elements and color filters are arranged in a matrix in the display area, and it is preferable that the row-direction position of the different color filters is different between a first row and a second row adjacent to the first row.
With this configuration, different color filters with different widths are not arranged in a row, which reduces the possibility that a user will notice the presence of different color filters that create a difference.

(Application Example 10)
An electronic device comprising the display device according to any one of the first to ninth aspects of the present invention.
With this configuration, it is possible to achieve both miniaturization of electronic devices such as head mounted displays and high quality images displayed on the electronic devices.

FIG. 1 is a diagram for explaining an outline of an electronic device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the internal structure of the electronic device according to the embodiment. FIG. 2 is a diagram for explaining an optical system of the electronic device according to the embodiment. 1 is a diagram illustrating a display device according to an embodiment of the present invention; FIG. 1 is a diagram illustrating a display device according to a comparative example. FIG. 4 is a diagram for explaining the configuration of a sub-area boundary. FIG. 4 is a diagram for explaining the arrangement of sub-area boundaries. 5A and 5B are diagrams illustrating the relationship between the amount of deviation and the angle of view. 13A and 13B are diagrams for explaining the configuration of sub-area boundaries of a display device according to a second embodiment. 11A and 11B are diagrams for explaining the arrangement of sub-area boundaries in a display device according to a first modified example. 13A and 13B are diagrams for explaining the arrangement of sub-area boundaries in a display device according to Modification 2.

Embodiments of the present invention will be described below with reference to the drawings. Note that in the drawings, each layer and each component is shown at a different scale so that they can be recognized on the drawings.

(Embodiment 1)
"Overview of Electronic Devices"
1 is a diagram for explaining an outline of an electronic device according to the present embodiment. First, the outline of the electronic device will be explained with reference to FIG.

The head mounted display 100 is an example of an electronic device according to this embodiment, and includes a display device 80 (see FIG. 3). As shown in FIG. 1, the head mounted display 100 has an appearance similar to glasses. A user wearing the head mounted display 100 is able to see image light GL (see FIG. 3) that forms an image, and is also able to see outside light in a see-through manner. In short, the head mounted display 100 has a see-through function that displays the outside light and the image light GL in an overlapping manner, and is small and lightweight while having a wide angle of view and high performance.

The head mounted display 100 includes a see-through member 101 that covers the front of the user's eyes, a frame 102 that supports the see-through member 101, and a first built-in device unit 105a and a second built-in device unit 105b that are attached to the part extending from the cover parts at both the left and right ends of the frame 102 to the temple part at the rear. The see-through member 101 is a thick and curved optical member (transparent eye cover) that covers the front of the user's eyes, and is divided into a first optical part 103a and a second optical part 103b. The first display device 151, which is a combination of the first optical part 103a and the first built-in device unit 105a on the left side in FIG. 1, is a part that displays a virtual image for the right eye in a see-through manner, and can function as an electronic device with a display function even when used alone. In addition, the second display device 152, which is a combination of the second optical part 103b on the right side in FIG. 1 and the second built-in device part 105b, is a part that forms a see-through virtual image for the left eye, and can function alone as an electronic device with a display function.

"Internal structure of electronic devices"
Fig. 2 is a diagram for explaining the internal structure of the electronic device according to the present embodiment. Fig. 3 is a diagram for explaining the optical system of the electronic device according to the present embodiment. Next, the internal structure and the optical system of the electronic device will be explained with reference to Fig. 2 and Fig. 3. Note that, although the first display device 151 is explained as an example of the electronic device in Fig. 2 and Fig. 3, the second display device 152 has almost the same structure in a symmetrical manner.

2, the first display device 151 includes a projection see-through device 70 and a display device 80 (see FIG. 3). The projection see-through device 70 includes a prism 10, which is a light-guiding member, a light-transmitting member 50, and a projection lens 30 for forming an image (see FIG. 3). The prism 10 and the light-transmitting member 50 are integrated by bonding, and are firmly fixed to the lower side of the frame 61 so that, for example, the upper surface 10e of the prism 10 and the lower surface 61e of the frame 61 are in contact with each other. The projection lens 30 is fixed to the end of the prism 10 via a lens barrel 62 that houses it. The prism 10 and the light-transmitting member 50 of the projection see-through device 70 correspond to the first optical part 103a in FIG. 1, and the projection lens 30 and the display device 80 of the projection see-through device 70 correspond to the first built-in device part 105a in FIG. 1.

In the projection see-through device 70, the prism 10 is an arc-shaped member curved to fit the face in a plan view, and can be considered as being divided into a first prism portion 11 on the central side close to the nose, and a second prism portion 12 on the peripheral side away from the nose. The first prism portion 11 is disposed on the light exit side, and has a first surface S11 (see FIG. 3), a second surface S12, and a third surface S13 as side surfaces having optical functions. The second prism portion 12 is disposed on the light entrance side, and has a fourth surface S14 (see FIG. 3) and a fifth surface S15 as side surfaces having optical functions.
Among these, the first surface S11 and the fourth surface S14 are adjacent to each other, the third surface S13 and the fifth surface S15 are adjacent to each other, and the second surface S12 is disposed between the first surface S11 and the third surface S13. In addition, the prism 10 has an upper surface 10e adjacent to the first surface S11 to the fourth surface S14.

The prism 10 is made of a resin material that exhibits high optical transparency in the visible range, and is molded, for example, by injecting and solidifying a thermoplastic resin into a mold. The main body portion 10s (see FIG. 3) of the prism 10 is an integrally molded product, but can be considered to be divided into a first prism portion 11 and a second prism portion 12. The first prism portion 11 enables the guide and emission of the image light GL, and also enables the transmission of outside light. The second prism portion 12 enables the entrance and guide of the image light GL.

The light-transmitting member 50 is fixed integrally with the prism 10. The light-transmitting member 50 is a member (auxiliary prism) that assists the see-through function of the prism 10. The light-transmitting member 50 exhibits high light transmittance in the visible range and is formed of a resin material with approximately the same refractive index as the main body portion 10s of the prism 10. The light-transmitting member 50 is formed, for example, by molding a thermoplastic resin.

As shown in FIG. 3, the projection lens 30 has, for example, three lenses 31, 32, and 33 along the incident optical axis. Each lens 31, 32, and 33 is a lens that is rotationally symmetrical about the central axis of the light incident surface of the lens, and at least one of the lenses is an aspheric lens. The projection lens 30 causes the image light GL emitted from the display device 80 to enter the prism 10 and re-image it on the eye EY. In short, the projection lens 30 is a relay optical system for re-imageing the image light GL emitted from each pixel 820 of the display device 80 on the eye EY via the prism 10. The projection lens 30 is held in a lens barrel 62, and the display device 80 is fixed to one end of the lens barrel 62. The second prism portion 12 of the prism 10 is connected to the lens barrel 62 that holds the projection lens 30, and indirectly supports the projection lens 30 and the display device 80.

In the display device 80, pixels 820 are arranged in a matrix of M rows and N columns. M and N are integers of 2 or more, and in this embodiment, as an example, M = 720 and N = 1280. Each pixel 820 includes p subpixels, and each subpixel includes a light-emitting element 830 and a color filter 840 through which light emitted from the light-emitting element 830 passes. The light-emitting element 830 emits white light, and in this embodiment, an organic EL element is used as an example. As the light-emitting element 830, an LED element or a semiconductor laser element can also be used. In this embodiment, p = 3, and each pixel 820 includes three light-emitting elements 830 and three color filters 840. The color filter 840 of each pixel 820 includes a red color filter 840R, a green color filter 840G, and a blue color filter 840B, and converts the light from the corresponding light-emitting element 830 into red light, green light, or blue light to generate the image light GL. In addition to this, when p=4, the color filter 840 may be provided with a color filter 840 for white light (effectively a subpixel without a color filter 840), or may be provided with a color filter 840 for yellow light.

As shown in FIG. 3, the optical axis of the image light GL emitted from each pixel 820 (or, more precisely, each subpixel) is shifted for each pixel 820 (or, more precisely, for each subpixel). The display device 80 of this embodiment corrects this shift, making it possible for the user to view a bright, high-resolution image. This point will be explained next.

"Display Configuration"
FIG. 4 is a diagram for explaining the display device according to the present embodiment, where (a) is a cross-sectional view of the whole, (b) is a plan view of a pixel, and (c) is a cross-sectional view of the pixel. FIG. 5 is a diagram for explaining a display device according to a comparative example, where (a) is a plan view of a pixel, and (b) is a cross-sectional view of the pixel. Next, the display device according to the present embodiment will be explained with reference to FIG. 4 and FIG. 5. Note that, although FIG. 5 is a diagram for explaining the comparative example, for ease of understanding, the same names and reference numbers are used for parts showing the same functions as those of the display device according to the present embodiment. In addition, in the following figures, for ease of understanding, an orthogonal coordinate system of x, y, and z is introduced, and the axis along the normal line of the display device is the z-axis, the axis along which the pixels 820 are arranged vertically in M rows in the display device (the axis along the extension direction of the column) is the y-axis, and the axis along which the pixels 820 are arranged horizontally in N columns in the display device (the axis along the extension direction of the row) is the x-axis. In addition, in the following drawings, in order to make the explanation easier to understand, the scale is arbitrary, and even in one drawing, the scale is different for each part.

As shown in FIG. 4A, the display device 80 has a display area 810. The optical axis of the image light GL from the pixel 820 located at the center C of the display area 810 is approximately along the normal line of the display device, but the optical axis of the image light GL from the pixel 820 located at the left end L of the display device is inclined to the right from the normal line of the display device. Similarly, the optical axis of the image light GL from the pixel 820 located at the right end R of the display device is inclined to the left from the normal line of the display device. In this way, in the display device 80 of an electronic device such as a head mounted display 100 having a light collecting optical system, the optical axis from the light emitting element 830 is inclined toward the center of the display area 810 except for the center of the display area 810. Therefore, in the display device 80 of this embodiment, the display area 810 is divided into 2q+1 subareas, and the relative positional relationship between the center of the light emitting element 830 and the center of the color filter 840 is configured to be different in the pixels 820 belonging to different subareas. Note that q is an integer of 1 or more, and in this embodiment, q=20. That is, the display area 810 is divided into a total of 41 subareas, including a first subarea including its central portion C, 20 subareas divided from the first subarea to the left along the x-axis, and 20 subareas divided from the first subarea to the right along the x-axis. In other words, there are 2q+1 types of arrangements in the display area 810 in which the relative positional relationship between the center of the light-emitting element 830 and the center of the color filter 840 differs.

Figure 4(bL) is a plan view of a pixel 820 located to the left of the center C of the display area 810, Figure 4(bC) is a plan view of a pixel 820 located to the right of the center C of the display area 810, and Figure 4(bR) is a plan view of a pixel 820 located to the right of the center C of the display area 810. Figure 4(cL) is a cross-sectional view of a pixel 820 located to the left of the center C of the display area 810, Figure 4(cC) is a cross-sectional view of a pixel 820 located to the right of the center C of the display area 810. The display device 80 of this embodiment includes a first light-emitting element 830 and a first color filter 840 through which light from the first light-emitting element 830 passes. As an example, these are included in a pixel 820 located to the left of the center C shown in FIG. 4(bL) or FIG. 4(cL), or a pixel 820 located to the right of the center C shown in FIG. 4(bR) or FIG. 4(cR). The display device 80 also includes a second light-emitting element 830 and a second color filter 840 through which light from the second light-emitting element 830 passes. As an example, these are included in a pixel 820 located in the center C shown in FIG. 4(bC) or FIG. 4(cC). Therefore, for example, the second light-emitting element 830 and the second color filter 840 included in the pixel 820 located near the center C of the display area 810 are disposed inside the first light-emitting element 830 and the first color filter 840 in the display area 810.

As can be seen from FIG. 4, the relative positional relationship between the center of the first light-emitting element 830 and the center of the first color filter 840 in a planar view is different from the relative positional relationship between the center of the second light-emitting element 830 and the center of the second color filter 840 in a planar view. Furthermore, as can be seen from FIG. 4(cL) and FIG. 4(cR), the optical axis from the first light-emitting element 830 is inclined toward the center of the display area 810 from the normal to the first light-emitting element 830, and the center of the first color filter 840 in a planar view is shifted toward the center of the display area 810 from the center of the first light-emitting element 830 in a planar view.

When the amount of deviation between the center of the first light-emitting element 830 and the center of the first color filter 840 in a plan view is defined as the first deviation, and the amount of deviation between the center of the second light-emitting element 830 and the center of the second color filter 840 in a plan view is defined as the second deviation, the second deviation is smaller than the first deviation. As an example, in the pixel 820 located in the center C shown in FIG. 4(bC) or FIG. 4(cC), the second deviation is zero, and the center of the second light-emitting element 830 and the center of the second color filter 840 are almost the same. In contrast, in the pixel 820 located to the left of the center C shown in FIG. 4(bL) or FIG. 4(cL), and the pixel 820 located to the right of the center C shown in FIG. 4(bR) or FIG. 4(cR), the first deviation is a finite positive value, and the second deviation is smaller than the first deviation.

In short, the color filter 840 is positioned in accordance with the optical axis from the light-emitting element 830 for each sub-area. Also, the further away from the center C of the display area 810, the more the color filter 840 is positioned with a greater offset toward the center of the display area 810 with respect to the light-emitting element 830. In the display device 80 of an electronic device having a focusing optical system, the inclination of the optical axis from the light-emitting element 830 increases toward the outside of the display area 810, but in the display device 80, the amount of offset between the light-emitting element 830 and the color filter 840 is adjusted according to the position of the light-emitting element 830 within the display area 810.

As a result of this configuration, the angle of view can be widened while maintaining the size of the light-emitting element 830 to a certain extent. The angle of view is the angle θc (see FIG. 8) between the optical axis from the pixel 820 and the normal line of the display device. This point will be explained in comparison with a comparative example. As shown in FIG. 5, in the conventional display device, the positional relationship between the light-emitting element 830 and the color filter 840 was the same throughout the display area 810. That is, the center of the light-emitting element 830 and the center of the color filter 840 were coincident in every pixel 820 in the display area 810. Therefore, when the resolution is increased, the angle of view becomes larger toward the outside of the display area 810, and the light-emitting element 830 has to be made smaller. Therefore, the image light GL becomes weaker, resulting in a dark display. That is, in the conventional display device, it was not possible to achieve both high resolution and bright display. In contrast, in the display device of this embodiment, even if the angle of view becomes larger outside the display area 810 as a result of increasing the resolution, the size of the light emitting element 830 can be maintained to a certain extent, and the intensity of the image light GL can be maintained. In other words, in the display device of this embodiment, high resolution and bright display are compatible, and the miniaturization of an electronic device such as a head mounted display 100 having a light collecting optical system and the high quality of the image displayed on the electronic device are compatible. As an example, if the row length of the subpixel is 7.5 micrometers, the column width of the subpixel is 2.5 micrometers, and the row length of the light emitting element 830 is 6.1 micrometers, the column width of the light emitting element 830 of the comparative example is 1.1 micrometers, but the column width of the light emitting element 830 of this embodiment is 1.8 micrometers. That is, the area of the light emitting element 830 of this embodiment can be 1.64 times larger than the area of the light emitting element 830 of the comparative example, enabling a lower driving voltage and bright display.

"Sub-area Boundary"
Fig. 6 is a diagram for explaining the configuration of a sub-area boundary, where (a) is a plan view of a pixel near the sub-area boundary, and (b) is a cross-sectional view of a pixel near the sub-area boundary. Fig. 7 is a diagram for explaining the arrangement of the sub-area boundary. Next, the configuration and arrangement of the sub-area boundary SB will be explained with reference to Fig. 6 and Fig. 7. Note that the sub-area boundary SB is the boundary between one sub-area and the adjacent sub-area.

The positional relationship between the light-emitting element 830 and the color filter 840 is the same for pixels 820 located within one sub-area. On the other hand, as shown in FIG. 6, the positional relationship between the light-emitting element 830 and the color filter 840 differs between pixels 820 belonging to different sub-areas. In the example of FIG. 6, the center of the light-emitting element 830 and the center of the color filter 840 are almost aligned in the pixel 820 to the left of the sub-area boundary SB, but the center of the color filter 840 is shifted to the left with respect to the center of the light-emitting element 830 in the pixel 820 to the right. Next, the configuration of the sub-area boundary SB will be described.

The display device 80 according to the present embodiment includes a separation portion 850 that separates the color filter 840. The separation portion 850 may be a member that suppresses the mixing of color materials in the color filter 840, a bank when the color filter 840 is formed by a printing method, or a so-called black matrix for preventing color mixing. In the example of FIG. 6, the amount of deviation between the center of the first light-emitting element 830 belonging to the right sub-area and the center of the first color filter 840 is the first deviation amount, and the amount of deviation between the center of the second light-emitting element 830 belonging to the left sub-area and the center of the second color filter 840 is the second deviation amount. As described above, the second deviation amount is smaller than the first deviation amount, but the difference between the first deviation amount and the second deviation amount is caused by the width of the separation portion 850 disposed between the first color filter 840 and the second color filter 840. The separation portion 850 that separates the sub-pixels located in one sub-area is constant at a standard width W _BS . In contrast, when adjacent subpixels belong to different subareas, the separation portion 850 has a modified width _WBC . The standard width _WBS and the modified width _WBC are different widths, and in this embodiment, the modified width _WBC is narrower than the standard width _WBS . In this way, the positional relationship between the light emitting element 830 and the color filter 840 can be easily adjusted by simply changing the width of the separation portion 850 at the subarea boundary SB.

Furthermore, in order to suppress the possibility that the user will notice the presence of the separation portion 850 that creates the difference, the difference between the first and second shift amounts is brought about by changing the width of the separation portion 850 that is disposed between the first and second color filters 840 and separates the red color filter 840R and the blue color filter 840B. This is because, since the human visual sensitivity is high for green, if the difference in the shift amount is created by avoiding the green color filter 840G that has high visual sensitivity, the presence of the separation portion 850 with the changed width _WBC is difficult to notice.

In this embodiment, N=1280 pixels 820 are arranged in the column direction of the display area 810, and the display area 810 is divided into 2q+1 (q=20) subareas. A group of 40 columns of pixels 820 located in the center C of the display area 810 constitutes the central subarea, and the amount of deviation is set to zero. Each of the 40 subareas other than the central subarea is composed of a group of 31 columns of pixels 820. The change width W _BC is set to 0.025 micrometers. Therefore, the amount of deviation increases by 0.025 micrometers each time the central subarea is moved to one subarea on the side, and the amount of deviation in the outermost subarea is 0.5 micrometers.

As shown in FIG. 7, it is preferable that the row-wise position of the separation portion 850 (sub-area boundary) that creates the difference between the first and second shift amounts is different between the first row and the second row adjacent to the first row. In this way, the separation portions 850 (sub-area boundaries SB) of different widths are not aligned in a row, which reduces the possibility that the user will notice the presence of the separation portion 850 that creates the difference. In this embodiment, the sub-area boundaries SB are shifted by one pixel 820 for each row, and three rows make one cycle.

"Displacement amount"
8 is a diagram for explaining the relationship between the amount of deviation and the angle of view. Next, the relationship between the amount of deviation and the angle of view will be explained with reference to FIG.

The amount of deviation between the light emitting element 830 and the color filter 840 in each sub-area is determined by where the sub-area is located in the display region 810 and the angle of view from the sub-area. As shown in FIG. 8, a sealing layer 860 is formed on the upper surface of the light emitting element 830, and a color filter 840 is formed on the upper surface of the sealing layer 860. A filling layer 870 is further formed on the upper surface of the color filter 840, and the sealing layer 860 to the filling layer 870 are mainly composed of organic matter. The refractive index of these three layers is n _A. A cover glass 880 is disposed on the upper surface of the filling layer 870, and quartz glass is used in this embodiment. The refractive index of this cover glass 880 is n _B. The upper surface of the cover glass 880 is air 890, and the refractive index of the air 890 is n _C. Furthermore, the emission angle of the image light GL from the light emitting element 830 (tilt angle from the normal line of the display device 80) is θ _A , the emission angle of the image light GL from the filling layer 870 to the cover glass 880 (tilt angle from the normal line of the display device 80) is θ _B , and the field angle of the image light GL from the cover glass 880 to the air 890 (tilt angle from the normal line of the display device 80) is θ _C. In this case, the law of refraction is expressed by Equation 1.

On the other hand, if the amount of deviation of color filter 840 with respect to light-emitting element 830 is L(x) and the distance from the top surface of light-emitting element 830 to the top surface of color filter 840 is _Z0 , the relationship between L(x), _Z0 , and _θA is expressed by Equation 2.

From formulas 1 and 2, the relationship between the angle of view θ _C and the amount of deviation L(x) is given by formula 3.

Ideally, each sub-area should generally satisfy the relationship in formula 3. In this embodiment, formula 3 is satisfied in the outermost sub-area. Specifically, n _A =1.80, n _B =1.48, n _C =1.00, θ _A =6.0°, θ _B =7.3°, θ _C =10.8°, and L (x=4.68357 mm, outermost sub-area)=0.5 micrometers. As a result, the angle of view from the outermost sub-area is approximately the same as the designed optical axis of the lens 33.

(Embodiment 2)
"Form with changed sub-area boundaries"
9A and 9B are diagrams for explaining the configuration of the sub-area boundary of a display device according to the second embodiment, where (a) is a plan view of a pixel near the sub-area boundary, and (b) is a cross-sectional view of a pixel near the sub-area boundary. A display device 80 according to the second embodiment will be explained below with reference to Fig. 9. Note that the same components as those in the first embodiment are given the same reference numerals, and duplicate explanations will be omitted.

This embodiment (Figure 9) differs from embodiment 1 (Figure 6) in the configuration of the sub-area boundary SB. The other configuration is almost the same as embodiment 1. In embodiment 1 (Figure 6), the sub-area boundary SB was formed by changing the width of the separation section 850. In contrast, as shown in Figure 9, this embodiment differs in that the width of the separation section 850 is the same, and the sub-area boundary SB is formed by changing the width of the color filter 840. The other configuration is the same as embodiment 1.

In the example of FIG. 9, the amount of deviation between the center of the first light-emitting element 830 belonging to the right sub-area and the center of the first color filter 840 is the first deviation, and the amount of deviation between the center of the second light-emitting element 830 belonging to the left sub-area and the center of the second color filter 840 is the second deviation. As described above, the second deviation is smaller than the first deviation, but the difference between the first deviation and the second deviation is caused by the width of another color filter 840 disposed between the first color filter 840 and the second color filter 840. The color filters 840 of the sub-pixels located in one sub-area are constant except for a row of sub-pixels (sub-pixels having another color filter 840) at the very edge of the sub-area. For example, in the right sub-area of FIG. 9, the standard width W _CFRS of the red color filter 840R and the standard width W _CFGS of the green color filter 840G are equal. On the other hand, in the blue color filter 840B, the change width W _CFBC of the row of blue color filters 840B forming the sub-area boundary SB is different from the standard width W _CFBS of the other blue color filters 840B. The standard width W _CFBS of the blue color filter 840B is equal to the standard width W _CFRS of the red color filter 840R and the standard width W _CFGS of the green color filter 840G. In this embodiment, the change width W _CFBC of the row of blue color filters 840B forming the sub-area boundary is narrower than the standard width W _CFRS of the red color filter 840R, the standard width W _CFGS of the green color filter 840G, and the standard width W _CFBS of the blue color filter 840B. In this way, the positional relationship between the light emitting element 830 and the color filter 840 can be easily adjusted by simply changing the width of the color filter 840 forming the sub-area boundary.

Furthermore, in order to reduce the possibility that a user will notice the presence of the color filter 840 that creates the difference, it is preferable that the difference between the first and second shift amounts is brought about by a blue color filter 840B disposed between the first and second color filters 840. This is because, since the human visual sensitivity is low for blue, creating a difference in the amount of shift with the blue color filter 840B, which has low visual sensitivity, can reduce the possibility that the user will notice the presence of the color filter 840 that creates the difference. With such a configuration, the same effect as in the first embodiment can be obtained.
The present invention is not limited to the above-described embodiment, and various modifications and improvements can be made to the above-described embodiment. Modifications will be described below.

(Variation 1)
"Type 1 with different sub-area boundary layout"
Fig. 10 is a diagram for explaining the arrangement of sub-area boundaries SB in a display device according to Modification 1. In the first embodiment (Fig. 7), the sub-area boundaries SB form one cycle of three rows. In contrast, in this modification, the cycle of the sub-area boundaries SB is two rows, as shown in Fig. 10. Alternatively, the cycle of the sub-area boundaries SB may be four rows, or any other number of rows.
Alternatively, the pixels may be arranged randomly for each row. In this case, the average value for each row may correspond to the position of the sub-area boundary SB discussed in the first embodiment.

(Variation 2)
"Type 2 with different sub-area boundary layout"
Fig. 11 is a diagram for explaining the arrangement of sub-area boundaries in a display device according to Modification 2. In the first embodiment (Fig. 7), the sub-area boundaries SB form one period of three rows. In contrast, in this modification, as shown in Fig. 11, the sub-area boundaries SB form one straight line. Such a configuration is also acceptable.

C...center, SB...sub-area boundary, S11...first surface, S12...second surface, S13...third surface, S14...fourth surface, S15...fifth surface, 10...prism, 10e...upper surface, 10s...main body portion, 11...first prism portion, 12...second prism portion, 30...projection lens, 31...lens, 32...lens, 33...lens, 50...light-transmitting member, 61...frame, 61e...lower surface, 62...lens barrel, 70...projection see-through device, 80...display device, 100...head-mounted display, 101...see-through portion material, 102...frame, 103a...first optical part, 103b...second optical part, 105a...first built-in device part, 105b...second built-in device part, 151...first display device, 152...second display device, 810...display area, 820...pixel, 830...light-emitting element, 840...color filter, 840B...blue color filter, 840R...red color filter, 840G...green color filter, 850...separation part, 860...sealing layer, 870...filling layer, 880...cover glass, 890...air.

Claims (10)

A first light emitting element;
A second light-emitting element;
a first color filter through which light from the first light-emitting element passes;
a second color filter through which light from the second light-emitting element passes;
A display device characterized in that the relative positional relationship between the center of the first light-emitting element and the center of the first color filter in a planar view is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter in a planar view. the first light-emitting element, the first color filter, the second light-emitting element, and the second color filter are disposed in a display region;
an optical axis from the first light-emitting element is inclined toward the center of the display area from a normal to the first light-emitting element;
2 . The display device according to claim 1 , wherein a center of the first color filter in a plan view is shifted toward a center of the display area from a center of the first light-emitting element in a plan view. the second light-emitting element and the second color filter are disposed inside the first light-emitting element and the first color filter in the display region;
3. The display device of claim 2, wherein when a first shift amount is a shift amount between a center of the first light-emitting element and a center of the first color filter in a planar view, and a second shift amount is a shift amount between a center of the second light-emitting element and a center of the second color filter in a planar view, the second shift amount is smaller than the first shift amount. Further comprising a separation section for separating the color filters,
4. The display device according to claim 3, wherein the difference between the first shift amount and the second shift amount is determined by the width of a separation portion disposed between the first color filter and the second color filter. The color filters include a red color filter, a green color filter, and a blue color filter,
4. The display device according to claim 3, wherein the difference between the first shift amount and the second shift amount is determined by the width of a separation portion disposed between the first color filter and the second color filter and separating the red color filter and the blue color filter. The light emitting elements and the color filters are arranged in a matrix in the display area,
6. The display device according to claim 4 or 5, characterized in that the row-direction position of the separation portion that creates the difference between the first shift amount and the second shift amount is different between a first row and a second row adjacent to the first row. The display device according to claim 3, characterized in that the difference between the first and second shift amounts is brought about by the width of another color filter disposed between the first and second color filters. The color filters include a red color filter, a green color filter, and a blue color filter,
8. The display device according to claim 7, wherein the other color filter is the blue color filter. The light emitting elements and the color filters are arranged in a matrix in the display area,
9. The display device according to claim 7, wherein the position in the row direction of the other color filter is different between a first row and a second row adjacent to the first row. An electronic device comprising a display device according to any one of claims 1 to 9.

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