WO2024071545A1

WO2024071545A1 - Display having non-uniform pixel density, manufacturing method therefor, and head-mounted display device comprising display

Info

Publication number: WO2024071545A1
Application number: PCT/KR2023/004800
Authority: WO
Inventors: 김아름; 김재현; 김현돈; 장봉균
Original assignee: 한국기계연구원
Priority date: 2022-09-29
Filing date: 2023-04-10
Publication date: 2024-04-04
Also published as: KR102670891B1; KR20240044912A

Abstract

The present invention relates to a display having a non-uniform pixel density, a manufacturing method therefor, and a head-mounted display device comprising the display, wherein the display comprises a panel unit and a drive unit. The panel unit comprises a high-definition area, having a relatively high pixel density, and a low-definition area, having a pixel density lower than the pixel density of the high-definition area. The driving unit drives the panel unit. The distance between unit pixels arranged in the high-definition area is shorter than the distance between unit pixels arranged in the low-definition area.

Description

Display with non-uniform pixel density, method of manufacturing the same, and head-mounted display device including the same

The present invention relates to a display with non-uniform pixel density, a manufacturing method thereof, and a head-mounted display device including the same. More specifically, it relates to a near-eye display capable of experiencing ultra-realistic virtual reality, which provides a high-resolution screen higher than human visual resolution. The present invention relates to a display having a non-uniform pixel density capable of reducing image capacity without reducing visually perceived resolution while providing a wide viewing angle, a method of manufacturing the same, and a head-mounted display device including the same.

As virtual reality-related technology has recently been commercialized, a variety of head-mounted display (HMD)-related technologies that allow users to enjoy virtual reality content are also being developed.

For example, Republic of Korea Patent Publication No. 10-2021-0130672 discloses a head-mounted display device that includes a panel that displays an image and a lens that refracts light generated from the panel and provides it to the eye.

However, in the panel that implements the image, the pixels that generate light are all arranged uniformly, so pixels that match the resolution that can be implemented must be arranged throughout the panel. Additionally, when displaying a high-resolution image, the high-resolution image must be transmitted across the entire panel, but as the resolution increases, the image capacity increases, which increases the image processing or communication load.

Accordingly, in Republic of Korea Patent No. 10-2256706, foveated rendering is applied to a head-mounted display, and a distorted image with low resolution is transmitted to the peripheral area based on a specific location, thereby relatively reducing the image processing or communication load. Technology is being developed.

However, even in this foveated rendering technology, pixels must be uniformly arranged across the entire panel that displays the image to enable high-resolution image transmission.

As above, in the head-mounted display currently being developed, pixels must be arranged uniformly to enable high-resolution display across the entire display, but considering the actual user's viewing angle, pixels are arranged at high density even in areas where high-resolution display is not necessary. However, there are problems such as increased panel manufacturing costs.

Related prior art documents include Republic of Korea Patent Publication No. 10-2021-0130672 and Republic of Korea Registered Patent No. 10-2256706.

Accordingly, the technical problem of the present invention was conceived in this regard, and the purpose of the present invention is to provide a near-eye display that allows users to experience ultra-realistic virtual reality. The goal is to provide a display with non-uniform pixel density that can reduce image capacity without reduction and reduce manufacturing costs.

Additionally, another object of the present invention is to provide a method of manufacturing the display.

Additionally, another object of the present invention is to provide a head mounted display device including the display.

A display according to an embodiment for realizing the object of the present invention described above includes a panel unit and a driving unit. The panel portion is composed of a high-definition area with a relatively high pixel density, and a low-definition area with a lower pixel density than the high-definition area. The driving unit drives the panel unit. The separation distance between unit pixels formed in the high-definition area is smaller than the separation distance between unit pixels formed in the low-definition area.

In one embodiment, the low-definition area is divided into a first area having a pixel density lower than that of the high-definition area, and a second area having a lower pixel density than the first area, and is formed in the first area. The separation distance between unit pixels may be smaller than the separation distance between unit pixels formed in the second area.

In one embodiment, the driver may independently drive unit pixels of the high-definition area, the first area, and the second area.

In one embodiment, the driver may include first sub-drivers that independently drive each of the unit pixels in the high-definition area, second sub-drivers that independently drive each of the unit pixels in the first area, and It may include third sub-drivers that independently drive each unit pixel of the second area.

In one embodiment, the pixel density between unit pixels formed in the high-definition area is the same, and the pixel density between unit pixels formed in the low-definition area is an exponential function according to the distance from the center point of the high-definition area. It can be reduced in form.

In one embodiment, the high-definition area may be set in consideration of the movement range of the eye and the differential viewing range of the eye when the eye is directed to the center point of the high-definition area.

In one embodiment, the high-definition area may be set to an angle obtained by adding the maximum motion angle of the eye from the center point to the maximum discriminatory viewing angle of the eye.

In one embodiment, the panel portion may have a spherical, flat, or polygonal shape.

In one embodiment, when the panel unit has a hemispherical shape, the unit pixels may be arranged to be spaced apart from each other along a circumferential surface formed by the panel unit.

In one embodiment, it further includes a tracking unit that tracks the position of the eye, and the driving unit can drive the panel unit based on the position of the eye tracked by the tracking unit and the maximum discrimination viewing angle of the eye.

In one embodiment, the driver may drive only some of the unit pixels in an area outside the maximum discrimination viewing angle of the eye.

In one embodiment, the driving unit drives all unit pixels included in the maximum discrimination viewing angle of the eye, and drives unit pixels not included in the maximum discrimination viewing angle of the eye to have the same pixel density as an adjacent image quality area. You can.

In one embodiment, in the panel unit, unit pixels may not be formed in a non-formation area, which is an area that deviates from the eye's viewing angle, based on the eye's viewing angle distribution.

In one embodiment, the high-definition area and the low-definition area may have an overall irregular elliptical shape.

In one embodiment, the area occupied by each unit pixel formed in the high-definition area may be equal to the area occupied by each unit pixel formed in the low-definition area.

In one embodiment, the unit pixel may include an organic light emitting diode (OLED) device or a Micro-LED device.

A display manufacturing method according to an embodiment for realizing another object of the present invention described above includes forming a panel portion by mounting unit pixels on a base substrate to have the same spacing; A step of stretching the base substrate differently for each high-definition region and the low-definition region and arranging unit pixels to have different separation distances for each region, wherein the amount of extension of the base substrate in the low-definition region is the amount of expansion of the base substrate in the high-definition region. It may be greater than the elongation amount of the substrate.

In one embodiment, when the base substrate is stretched, the amount of stretching of the base substrate may be greater in the order of the second area of the low-quality area, the first area of the low-quality area, and the high-quality area.

A head mounted display device according to an embodiment for realizing another object of the present invention described above includes the display and a mounting portion in which the display is mounted as a pair and forms a glasses frame.

According to embodiments of the present invention, when the display is mounted on the user's face, the user secures the required viewing angle by moving the head without moving the eyeball, so that the image quality can be varied while tracking the movement state of the eyeball in real time. The function of the head mounted display device can be effectively implemented by simply designing the high-definition area and low-definition area into preset areas by considering the eye movement range and eye discrimination viewing angle without driving it.

This is different from the conventional display that is divided into a high-definition area and a low-definition area, where the actual pixel density is formed to be the same and the driving method is varied to implement different resolutions. By designing it, the convenience of design and manufacturing can be improved and manufacturing costs can be reduced by simplifying the complex driving method compared to the conventional technology.

That is, by setting the separation distances of unit pixels formed in the high-definition area and the low-definition area divided into the first and second areas to be different from each other and driving each unit pixel independently through the sub-driver, the always high-definition and always low-definition areas The driving method can be simplified by implementing .

Furthermore, by not forming unit pixels in areas that deviate from the viewing angle due to the distribution of the viewing angle of the eye, convenience in manufacturing and design and reduction in manufacturing costs can be achieved.

Of course, while maintaining the pixel density of the preset high-definition area and low-definition area, the position of the eye is additionally tracked and the image quality of the corresponding area is adjusted only within the range of the maximum discrimination viewing angle according to the eye position (for example, if it is a high-definition area, It is possible to provide a more focused display to the user by driving the display (at high definition), but outside the viewing angle range, at the video quality of the adjacent area (for example, if it is a high-definition area, then at the low-definition quality of the adjacent area).

Furthermore, since pixels having different spacing distances can be arranged in each region as described above through the stretchable base substrate, the panel part manufacturing process can be compared to the process of arranging pixels to have different arrangements from the initial state. It can be simplified, and through this, process efficiency and productivity can be improved.

Figure 1 is a perspective view showing a head mounted display device according to an embodiment of the present invention.

Figure 2 is a graph schematically showing the distribution of optic nerve density in the eye.

FIG. 3 is a schematic diagram illustrating the display of FIG. 1 considering the visual field of the eye.

FIG. 4 is a schematic diagram showing a high-definition area and a low-definition area according to pixel density in the display of FIG. 3.

FIG. 5 is a schematic diagram showing an example of the pixel portion formation state of the panel portion along line II′ of FIG. 4 , spread out in a straight line for convenience of explanation.

FIG. 6 is a graph for explaining another example of the pixel portion formation state of the panel portion of FIG. 4.

FIG. 7 is a distribution diagram for explaining another example of the pixel portion formation state of the panel portion of FIG. 4.

Figure 8 is a schematic diagram showing a display according to another embodiment of the present invention, taking into account the visual field of the eye.

Figure 9 is a schematic diagram showing a display according to another embodiment of the present invention, taking into account the visual field of the eye.

1: Head mounted display device

10, 20, 30: Display 20: Eyeball

100: High-definition area 200, 201: Low-definition area

210: first area 220: second area

300: unformed area 400: tracking part

500: driving unit 511: first sub driving unit

512: second sub-drive unit 513: third sub-drive unit

521: 1st signal line 522: 2nd signal line

523:

Third signal line

600, 601, 602: Panel section

610: base substrate 620: pixel portion

621: first unit pixel 622: second unit pixel

623: Third unit pixel

Since the present invention can be subject to various changes and can have various forms, embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “consist of” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings.

Referring to FIG. 1, the head mounted display device 1 according to this embodiment includes a display 10 and a mounting unit 50.

The mounting unit 50 is a frame on which the display 10 is mounted. As shown, it is manufactured in the same shape as glasses or goggles, and the display 10 is mounted as a pair on the user's eye area.

In addition, the mounting portion 50 is worn by the user to experience virtual reality (VR) or augmented reality (AR), and the display 10 can be used while worn like glasses or goggles. You experience the video displayed through the screen.

The display 10 displays necessary images, and a pair may be produced identically, but the actual displayed images may be different depending on the image being implemented.

In general, a user experiences a displayed image while wearing such a head mounted display device 1, and at this time, the user's eyeballs may be directed to a desired position in the displayed image. However, due to the characteristics of the head mounted display device 1, the user may move the head to observe the image at a required position, and accordingly, the actual movement range of the eyeball itself may be relatively narrow.

A detailed description of the display 10 will be described later with reference to the drawings.

Referring to Figure 2, in general, in the eye, cone cells are concentrated and distributed around the fovea, and as they deviate outward from the fovea, rod cells are distributed in a form that increases rapidly and then gradually decreases, and a blind spot exists in the ganglion area. do.

Therefore, the eye discerns substantially all colors within a range of approximately 30 degrees centered on the fovea. Considering this, it is sufficient for the resolution of the display to be high in the adjacent area centered on the fovea, and the resolution of the display in the outer area is sufficient. The resolution may be set relatively low.

That is, as will be described later, the display 10 in this embodiment is divided into a high-definition area that displays high resolution and a low-definition area that displays low resolution. The division of the high-definition area and the low-definition area is divided into It is necessary to consider the structure of

FIG. 3 is a schematic diagram illustrating the display of FIG. 1 considering the visual field of the eye. FIG. 4 is a schematic diagram showing a high-definition area and a low-definition area according to pixel density in the display of FIG. 3.

Referring to FIGS. 3 and 4, first, the display 10 in this embodiment includes a hemispherical panel portion 600 having a semicircular cross-section as shown. Furthermore, the display 10 further includes a tracking unit 400 and a driving unit 500.

As shown in a cross-sectional view, the display 10 includes a high-definition area 100 in a predetermined area centered on a central point P, and a low-definition area 200 formed outside the high-definition area 100, The low-quality area 200 may be divided into a first area 21 and a second area 22.

In order to divide the display 10 into various areas, it is necessary to first consider the position of the eyeballs 20 of the user wearing the display 10.

When the display 10 is a spherical display and the eye 20 is located in the inner center of the display 10, the fovea of the eye 20 is theoretically 45° in one direction from the central point P. It can be moved up to a range of . That is, the maximum eye movement angle A, which is the range in which the eye 20 can move, is approximately 45 degrees in one direction from the center point P. In this case, the center point P may be defined as the exact center point of the spherical display 10.

On the other hand, when the eye 20 gazes at a specific position, it has a maximum discriminative viewing angle (C), that is, a clear viewing angle range (F), in a range of approximately 5 degrees centered on the gaze position, and the viewing angle (C) It is possible to identify the display displayed in the range of .

Therefore, the eye 20 adds 45°, which is the maximum range that can move in one direction from the center point (P), and 2.5°, which is the range of the maximum discrimination viewing angle (C) (the viewing angle in the inner direction overlaps). The actual display is observed in one area, the area corresponding to the range (B) of 47.5 degrees.

In other words, a user wearing the display 10 having a hemispherical shape may move the eyeball 20 in all directions only up to a position (B) within a range of up to 47.5° from the center point (P). You mainly observe the display. At this time, the range of 47.5° is illustrated in FIG. 3 as an angle formed in one direction along the circumference in a semicircle, but since the display 10 has a hemispherical shape, the range is 47.5° in all directions from the center point P. It is obvious that it is defined as a range formed along the circumference of .

Accordingly, in this embodiment, as shown in FIG. 4, a range formed along a circumference of 47.5° in all directions from the center point P is defined as the high-definition area 100 of the display 10.

Meanwhile, the outside of the high-definition area 100, where the optic nerve is concentrated as described above and the displayed display is substantially observed by the eye, is defined as the low-definition area 200 of the display 10, as shown in FIG. 4. .

That is, in this low-definition area 200, even if the user moves the eyeball 20 in any direction while wearing the display 10, it is difficult to distinguish the display displayed through the eyeball 20. It is difficult, and as a result, the user does not feel any inconvenience even if the display is displayed at a relatively low image quality.

The low-quality area 200 may be divided into a first area 210 and a second area 220 as shown in FIG. 4 . That is, the first area 210 is an area formed adjacent to the high-definition area 100, and the second area 220 is an area formed outside the first area 210.

At this time, the first area 210 may be defined as, for example, an area deviating from 47.5°, which is the maximum angle from the center point P of the high-definition area 100, by a range of 12.5°, and Area 2 210 is the outside of the first area 210 and can be defined as an area ranging from 60° to 90° from the center point P.

However, the ranges of the first region 210 and the second region 220 illustrated above are set illustratively in consideration of the density distribution of the optic nerve described with reference to FIG. 2, and the ranges may vary in various ways. .

As described above, when the display 10 in this embodiment has a hemispherical shape, a high-definition area 100 is formed along the circumference in any direction from the center point P up to a range of 47.5 degrees, and from 47.5 degrees. A first area 210 of the low-quality area is formed up to 60°, and a second area 22 of the low-quality area is formed from 60° to 90°.

At this time, the display 10 has different pixel densities depending on each region. That is, the high-definition area 100 is formed to have the highest pixel density, the first area is formed to have a lower pixel density than the high-definition area 100, and the second area is formed to have a lower pixel density than the first area. It is formed to have a lower pixel density. Of course, the degree of difference in pixel density in each area can be designed in various ways.

The structure that implements the difference in pixel density for each area of the display 10 will be described later.

Meanwhile, in the above description, the high-definition area 100 and the low-definition area 200 are divided, and the low-definition area 200 is divided into the first and

second areas

210 and 220. However, the high-definition area is 1. It contains 2 areas and the low-quality area does not necessarily have to be divided into 2 areas.

That is, the high-definition area 100 can also be divided into two or more areas with different pixel densities. Additionally, the low-quality area 200 may consist of only an area with one pixel density, or may be further subdivided into three or more areas with three or more different pixel densities.

The tracking unit 400 is provided at a predetermined position on the display 10 and tracks the position of the eyeball 20. When the position of the eyeball is tracked through the tracking unit 400, information on the position of the eyeball 20 is provided to the driving part 500, and the driving part 500 provides the positioning information of the eyeball 20. The display 10 can be driven by considering .

As described above, when the eye 20 is directed to a specific position, the eye 20 is displayed in a range of 5 degrees, which is the maximum discriminative viewing angle (C), that is, the clear viewing angle (F), centered on the gaze position. It mainly identifies the display. Accordingly, the display displayed outside the range of the clear viewing angle (F) is only a peripheral display and does not need to be displayed at the same resolution as the display displayed within the range of the clear viewing angle (F).

Therefore, when the location information of the eye 20 is provided through the tracking unit 400, the driving unit 500 displays the image quality of the corresponding area only in the range of the clear viewing angle (F), and the clear viewing angle (F) In the range beyond F), the display can be displayed with the image quality of the adjacent area.

For example, if the position of the eye 20 belongs to the high-definition area 100, the display that can be displayed in the high-definition area 100 is within the clear viewing angle (F) range based on the position of the eye 20. A display of maximum image quality is displayed, but in an area outside the clear viewing angle (F) range, the maximum image quality that can be displayed in the adjacent area, the first image quality 210, is displayed even if the corresponding area belongs to the high definition area 100. A high-quality display can be displayed.

Therefore, by controlling the resolution of the display in consideration of the position of the eye 20, sufficient information can be provided to the user while minimizing power consumption in display.

In particular, in the case of this embodiment, in a state where the display 10 itself is divided into high-definition and low-definition regions depending on the region, that is, in a state in which pixel densities are formed differently, as will be described later, the clear viewing angle (F) By driving only some of the formed pixels in areas outside the range, power consumption in display can be further reduced and display driving efficiency can be improved.

As described above, the driving unit 500 can drive the display 10 based on the position information of the eyeball 20 tracked by the tracking unit 400.

Alternatively, the display 10 may be driven without considering the location information of the tracking unit 400, and this driving mode may be selected in consideration of the user's selection or the display usage environment.

Driving of the display 10 using the driving unit 500 will be described later.

That is, in FIGS. 3 and 4, the panel unit 600 of the display 10 is described as having a hemispherical shape. However, for convenience of explanation of the arrangement of pixel units formed in the panel unit 600, FIG. As shown in Figure 5, the panel portion 600 is shown unfolded in a planar shape.

Referring to FIG. 5, the panel unit 600 includes a base substrate 610 on which pixels, that is, pixels, are arranged, and a pixel unit 620 formed in a predetermined arrangement on the base substrate 610. .

Meanwhile, in order to construct the actual panel unit 600, in the case of a TFT-LCD panel, the pixels may be composed of a color filter and a liquid crystal layer, and a separate backlight to provide light must also be provided, but for convenience of explanation, It is explained schematically only in the form in which pixels are arranged. Furthermore, when the panel unit 600 is composed of OLED or Micro-LED, the pixel is composed of an OLED device or Micro-LED device that emits light, and components other than the above devices are not shown for convenience of explanation. do.

Preferably, the pixel unit 620 in this embodiment includes a Micro-LED element. Hereinafter, the panel unit 600 will be described by way of example as consisting of a Micro-LED, but other TFT-LCD It is clear that the pixel portion can be formed in the same arrangement method in the case of a panel or OLED panel.

The pixel unit 620 includes first unit pixels 621 arranged in the high-definition area 100, second unit pixels 622 arranged in the first area 210 of the low-definition area 200, and third unit pixels 623 arranged in the second area 220 of the low-quality area 200.

In addition, each unit pixel constituting the pixel unit 620 is individually connected to the sub-drivers, and the driving is individually controlled by the driving of each sub-driver.

To this end, the driver 500 also includes first sub-drivers 511 that are individually connected to the first unit pixels 621 and individually drive the first unit pixels 621, and the second Second sub-drivers 512 are individually connected to the unit pixels 622 to individually drive the second unit pixels 622, and are individually connected to the third unit pixels 623 to drive the second unit pixels 622. It includes third sub-drivers 513 that individually drive the third unit pixels 623.

Furthermore, the driver 500 includes first signal lines 521 that transmit driving signals between the first unit pixels 621 and each of the first sub-drivers 511, and the second unit. Second signal lines 522 transmitting driving signals between the pixels 622 and each of the second sub-drivers 512, and the third unit pixels 623 and the third sub-drivers. (513) It includes third signal lines 523 that transmit driving signals between them.

As described above, in the case of the driver 500, the driving of each unit pixel included in the panel unit 600 is individually controlled by each sub-driver, so each of the unit pixels that require driving is selectively selected. Since it is driven only by , the efficiency of display driving is improved. In particular, as described above, when the display 10 is driven based on the results of tracking the eye 20 by the tracking unit 400, effective driving can be implemented, thereby further improving the driving efficiency of the display. .

In contrast, each of the first unit pixels 621, each of the second unit pixels 622, and each of the third unit pixels 623 independently receive signals through sub-drivers and operate independently. It is sufficient to operate, and as shown, the sub-drivers may not necessarily be divided into first to

third sub-drivers

511, 512, and 513 and arranged by region. That is, it is driven through one integrated driver, but each

unit pixel

621, 622, and 623 may be configured to independently receive driving signals and operate independently.

In this embodiment, the high-definition area 100 is designed to have the highest pixel density, the first area 210 has the lowest pixel density, and finally, the second area 220 has the lowest pixel density.

To this end, as shown in FIG. 5, the separation distance d1 between adjacent first unit pixels 621 formed in the high-definition area 100 is formed in the first area 210. It is smaller than the separation distance d2 between adjacent second unit pixels 622. In addition, the separation distance d2 between the adjacent second unit pixels 622 formed in the first area 210 is equal to the distance d2 between the adjacent third unit pixels 622 formed in the second area 220. (623) is smaller than the separation distance (d3) between them.

At this time, in Figure 5, only the distance between unit pixels arranged in one direction is shown for comparison, but it is obvious that the distance between unit pixels arranged in a direction perpendicular to the drawing can also be formed to be the same. do.

In this case, the detailed value or difference of each of the separation distances (d1, d2, d3) may vary depending on the design.

Meanwhile, the separation distances d1, d2, and d3 may be different from each other, but the area occupied by each of the first unit pixels 621 formed in the high-definition area 100 is in the first area 210. The area occupied by each of the second unit pixels 622 may be the same as the area occupied by each of the third unit pixels 623 formed in the second area 220 .

That is, each of the first to

third unit pixels

621, 622, and 623 is a unit pixel with the same area and size. Only the relative arrangement relationship is different as described above, and each of them is the same. It may be composed of unit pixels in the form of

As described above, by varying the separation distance between unit pixels formed in the high-definition area 100, the first area 210, and the second area 220, the pixel densities in the areas can be formed differently. You can. Therefore, it can be produced with the resolution in the high-definition area and low-definition area already set to a preset range, thereby eliminating the complicated driving method of varying the resolution through actual driving, and improving the driving efficiency of the display. You can.

In particular, as described above, by dividing the image quality area of the display in consideration of the actual range of movement of the user's eyeball 20, even if the unit pixels are arranged in the preset range as described above, the user avoids inconvenience due to the difference in resolution. I can't feel it.

Meanwhile, when manufacturing the panel unit 600, it can be manufactured by mounting individual unit pixels in the high-definition area 200 and the low-definition area 200 to have a preset separation distance.

To this end, a process of setting a high-definition area and a low-definition area including the first and second areas separately and mounting unit pixels to have different separation distances in the corresponding areas can be applied.

Alternatively, when manufacturing the panel portion 600, a so-called kirigami structure can be applied. That is, if the base substrate 610 is a flexible or stretchable substrate that can be extended or stretched, in the initial state, all unit pixels are mounted to have the same spacing regardless of area, and then The base substrate 610 may be stretched differently for each region to form unit pixels with different spacing distances for each region.

Thereafter, the base substrate is stretched differently for each region into the high-definition region 100 and the low-definition region 200, and the unit pixels are rearranged to have different spacing distances for each region.

That is, the stretching amount of the base substrate 610 for the low-definition region 200 is set to be larger than the stretching amount for the high-definition region 100, thereby performing greater stretching for the low-definition region. do.

In particular, when the low-quality area 200 is divided into two

areas

210 and 220, when expanding the base substrate 610, the second area 220 is stretched the most to create space between unit pixels. The separation distance between unit pixels is formed as the largest, the first area 210 is expanded to the next greatest extent to form the separation distance between unit pixels, and the high-definition area 100 is expanded to the minimum, or the initial state is maintained as is. By maintaining this, the separation distance between unit pixels can be formed as narrow as possible.

Referring to FIG. 6, the arrangement of the pixel units 620 arranged in the panel unit 600 can be configured as a continuous arrangement that decreases with an exponential function, especially in the low-quality area 201.

That is, in the high-definition area 100, since the display must be displayed with high-quality resolution at any location through various changes in the position of the user's eyeball 20, unit pixels are arranged to have the maximum pixel density that can be implemented.

However, in the low-definition area 201, the displayed display deviates from the user's field of view, and in particular, the further away the low-quality region 201 is from the center point P, the further away it becomes from the user's field of view.

Accordingly, the unit pixels of the low-quality area 201 may be arranged in an exponential form as shown in FIG. 6 in which the pixel density decreases as the distance from the center point P increases.

In this case, the low-quality area 201 is not divided into a first area and a second area as in the previous example, and as the distance from the center point P increases, the pixel density increases in the form of an exponential function. Arranged to decrease, it is sufficient.

As shown in FIG. 7, checking the viewing angle distribution identified through the user's eye 20, the high-definition area 100 described above is formed around the center point P, and the low-definition area 202 is It is formed outside the high-definition area 100.

However, unlike the high-definition area 100, the low-definition area 202 may be formed to have an overall irregular oval shape and be long in both directions. That is, considering that the viewing angle of the eye 20 is longer in the left and right directions than in the up and down directions, the pixel portions of the panel unit are distributed only in the low image quality area 202, which is formed in an irregular oval shape. can do.

Through this, pixel portions are not formed unnecessarily in the vertical direction where the viewing angle of the eye 20 is not formed, making it possible to facilitate manufacturing and reduce manufacturing costs.

The display 20 according to this embodiment is substantially the same as the display 10 described with reference to FIGS. 1 to 7 except that the panel portion 601 is formed in the horizontal direction, and therefore has the same configuration. The same reference numbers are used for elements and duplicate descriptions are omitted.

Referring to FIG. 8, in the display 20 according to this embodiment, the panel portion 601 is formed in a planar shape to extend in the horizontal direction.

In this case, the mounting portion of the head mounted display device on which the display 20 is mounted must also be designed so that a flat display is mounted.

As described above, when the panel portion 601 extends in a planar shape, the range dividing the high-definition region and the low-definition region must be somewhat changed depending on the shape of the panel portion.

That is, the maximum eye movement angle (A'), which is the maximum range in which the eyeball 20 can move, is at the point where the center line (X') extending from the center of the eyeball 20 intersects the panel portion 601 (S). ') is defined as.

In addition, the maximum discriminative viewing angle (C') of the eye 20 is also defined as the point (T') where a line extending in consideration of the clear viewing angle range (F) intersects the panel portion 601.

Accordingly, the high-definition area is set as a range (B') that extends from the center point (P) along the plane of the panel unit 601, passes through the intersection point (S'), and reaches the intersection point (T'). do.

As described above, when the shape of the panel portion 601 is not the spherical shape that the eyeball 20 has, the point where the panel portion 601 meets a line extending from the viewing angle of the eyeball 20 is used as the reference point. You can set a high-definition area.

In the case of the display 30 according to this embodiment, it is substantially the same as the display 10 described with reference to FIGS. 1 to 7 except that the panel portion 602 is formed in a polygonal shape, so it is the same The same reference numbers are used for components and overlapping descriptions are omitted.

Referring to FIG. 9, in the display 30 according to this embodiment, the panel portion 602 is formed in a multi-faceted shape. That is, it is a structure in which planar unit panels are continuously connected to form a predetermined angle, and may have an overall curvature similar to a hemispherical shape, but each unit panel is characterized by extending in a plane.

In this case, the mounting portion of the head-mounted display device on which the display 30 is mounted must also be designed to accommodate the multi-faceted display.

As described above, when the panel portion 602 extends in a polygonal shape, the range dividing the high-definition region and the low-definition region must be somewhat changed depending on the shape of the panel portion. This is substantially the same as what was described with reference to FIG. 8.

That is, the maximum eye movement angle (A"), which is the maximum range in which the eyeball 20 can move, is the point where the center line (X") extending from the center of the eyeball 20 intersects the panel portion 602 (S ") is defined as.

In addition, the maximum discriminative viewing angle (C") of the eye 20 is also defined as the point (T") where a line extending in consideration of the clear viewing angle range (F) intersects the panel portion 602.

Accordingly, the high-definition area extends from the center point (P) along the polygonal plane of the panel portion 602, passes through the intersection point (S"), and has a range (B") from the intersection point (T"). is set to .

As described above, when the shape of the panel portion 602 is not the spherical shape that the eye 20 has, the point where the panel portion 602 meets a line extending from the viewing angle of the eye 20 is used as the reference point. You can set a high-definition area.

That is, as exemplified through the embodiments of FIGS. 8 and 9, when the panel portion has a shape other than a hemisphere, the point where the panel portion intersects with a line extending from the eyeball 20 in the same manner is taken into consideration. Thus, a high-definition area can be defined.

Furthermore, the low-definition area in the outer direction of the high-definition area is defined by considering the angle of the range to which the low-definition area illustrated in FIG. 4 belongs, and similarly extending the line forming the angle to intersect the panel portion. You can.

Thus, a display can be manufactured by defining a high-definition area and a low-definition area for panel parts of various shapes, and presetting the pixel density based on this.

According to the above-described embodiments of the present invention, when the display is mounted on the user's face, the user secures the necessary viewing angle by moving the head without moving the eyeball, thereby improving image quality while tracking the movement state of the eyeball in real time. The function of the head-mounted display device can be effectively implemented by simply designing the high-definition area and the low-definition area into preset areas by considering the eye movement range and eye discrimination viewing angle, rather than driving them differently.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the following patent claims. You will understand that it is possible.

Claims

A panel unit comprising a high-definition area having a relatively high pixel density and a low-definition area having a lower pixel density than the high-definition area; and

It includes a driving unit that drives the panel unit,

A display wherein the separation distance between unit pixels formed in the high-definition area is smaller than the separation distance between unit pixels formed in the low-definition area.
The method of claim 1, wherein the low image quality area is:

It is divided into a first area having a pixel density lower than the pixel density of the high-definition area, and a second area having a lower pixel density than the first area,

A display wherein the separation distance between unit pixels formed in the first area is smaller than the separation distance between unit pixels formed in the second area.
The method of claim 2, wherein the driving unit,

A display characterized in that unit pixels of the high-definition area, the first area, and the second area are driven independently.
The method of claim 3, wherein the driving unit,

first sub-drivers that independently drive each unit pixel of the high-definition area;

second sub-drivers that independently drive each unit pixel of the first area; and

A display comprising third sub-drivers that independently drive each unit pixel of the second area.
According to paragraph 1,

The pixel density between unit pixels formed in the high-definition area is the same,

A display wherein the pixel density between unit pixels formed in the low-definition area decreases exponentially according to the distance from the center point of the high-definition area.
The method of claim 1, wherein the high-definition area is:

When the eye is directed to the center point of the high-definition area, the display is set in consideration of the movement range of the eye and the differential field of view of the eye.
The method of claim 6, wherein the high-definition area is:

A display characterized in that the angle is set to the sum of the maximum motion angle of the eye from the center point and the maximum discriminative viewing angle of the eye.
The method of claim 1, wherein the panel unit,

A display characterized by having a spherical, planar or multi-faceted shape.
According to paragraph 1,

If the panel part has a hemispherical shape,

A display wherein the unit pixels are arranged to be spaced apart from each other along a circumferential surface formed by the panel unit.
According to paragraph 1,

It further includes a tracking unit that tracks the position of the eye,

The display, wherein the driving unit drives the panel unit based on the position of the eye tracked by the tracking unit and the maximum discrimination viewing angle of the eye.
The method of claim 10, wherein the driving unit,

A display characterized in that only some of the unit pixels are driven in an area outside the maximum discrimination viewing angle of the eye.
The method of claim 10, wherein the driving unit,

A display characterized in that all unit pixels included in the maximum discrimination viewing angle of the eye are driven, and unit pixels not included in the maximum discrimination viewing angle of the eye are driven to have the same pixel density as an adjacent image quality area.
The method of claim 1, wherein in the panel portion,

A display characterized in that unit pixels are not formed in the non-formation area, which is an area that deviates from the eye's viewing angle, based on the eye's viewing angle distribution.
According to clause 13,

A display characterized in that the high-definition area and the low-definition area have an overall irregular elliptical shape.
According to paragraph 1,

A display, wherein an area occupied by each unit pixel formed in the high-definition area is the same as an area occupied by each unit pixel formed in the low-definition area.
The method of claim 1, wherein the unit pixel is:

A display comprising an organic light emitting diode (OLED) element or a Micro-LED element.
Forming a panel unit by mounting unit pixels at equal intervals on a base substrate; and

It includes the step of stretching the base substrate differently for each high-definition area and low-definition area and arranging unit pixels to have different separation distances for each area,

A display manufacturing method, wherein an amount of extension of the base substrate in the low-definition area is greater than an amount of extension of the base substrate in the high-definition area.
The method of claim 17, wherein when extending the base substrate,

A display manufacturing method, wherein the amount of extension of the base substrate is greater in the order of the second area of the low-quality area, the first area of the low-quality area, and the high-quality area.
The display of claim 1; and

A head-mounted display device in which the displays are mounted as a pair and includes a mounting portion that forms a glasses frame.