TWI651545B - Imaging device capable of changing imaging distance - Google Patents

Abstract

An image forming apparatus capable of varying an imaging distance, comprising: a plurality of dielectric materials that can be rotated and used to generate a birefringence phenomenon, a display unit for generating a plurality of light groups, and one electrically connected to the medium unit and the display unit control unit. Each of the light groups has a principal ray that travels straight along an axis direction, and a primary ray that is imaged at an angle to the axis by being refracted with respect to the dielectric material, the principal ray intersecting the secondary ray to form a real image And intersecting in front of the human eye to form a virtual image. The control unit controls the rotation of each medium material according to an image signal to change the angle of the imaging angle, thereby changing the distance and the close distance of the virtual image relative to the human eye. Thereby, the present invention can be minimized by directly imaging the retina, and further, a virtual image can be generated by the secondary ray which can change the imaging angle, so that the human eye can have a far and near visual feeling for the formed image.

Description

Imaging device capable of changing imaging distance

The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus capable of varying an imaging distance.

Referring to FIG. 1, a conventional pupil imaging apparatus 1 disclosed in the Patent No. I490545 of the Republic of China, which mainly uses the principle of pinhole imaging, generates a digital light 12 which propagates along a straight line by a display unit 11, directly in A retina 21 of a human eye 2 is imaged, thereby omitting an imaged or projected lens, minimizing the requirements.

According to the US media The Verge reported on February 5, 2018, Intel is about to launch a smart glasses called Vaunt. The biggest difference between Vaunt and the most popular smart glasses on the market is:

1, the appearance is similar to the size of ordinary glasses, weighing only 50g.

2, using laser projection, directly projected in the human eye retina.

3, support for myopia glasses / ordinary glasses.

Obviously, the need for light, thin, short, small, and power-saving is the common goal of wearable portable electronic devices, and Vaunt can make the shape and general glasses. It is no different, and weighs only 50g. The key point is to use the laser projection method directly in the retina of the human eye as disclosed in the patent No. I490545, and the imaging or projection lens can be omitted to simplify the assembly and The purpose of the occupied space.

As shown in Fig. 2, since the patent No. I490545 uses collimated laser light to directly image on the retina, it is imagined for the brain that an object (virtual image) is in front of the human eye, however, The object does not actually exist, so the brain cannot judge whether the aforementioned virtual image is at position a, or position b, or position c, and there is no distant or near sense of distance.

Accordingly, it is an object of the present invention to provide an imaging apparatus that provides a variable imaging distance that allows the human eye to have a near, near visual perception of the formed image.

Therefore, the imaging device capable of changing the imaging distance of the present invention is suitable for generating a real image in the retina of the human eye, and is suitable for generating a virtual image in front of the human eye, the imaging device comprising: a medium unit, a display unit, and a control unit.

The dielectric unit includes a plurality of dielectric materials that are rotatable and used to create a birefringence phenomenon, the dielectric materials each having an optical axis.

The display unit is configured to generate a group of light rays, each group of rays having a main ray traveling straight along an axis direction, and a primary ray that is incident with the dielectric material and refracted to form an angle with the axis, so that the main ray Light and the secondary light are suitable for The retina of the human eye intersects to produce the real image, and the chief ray and the secondary ray are opposite to the extension of the real image, and are adapted to intersect in front of the human eye to produce the virtual image at a distance from the real image.

The control unit is electrically connected to the medium unit and the display unit, and controls the display unit to generate the light groups according to an image signal, and controls the rotation of the medium materials to change the imaging angle with the rotation of the medium materials. .

The invention has the effect of minimizing the invention by directly imaging in the retina, and further generating a virtual image with secondary rays capable of changing the angle of the imaging, so that the human eye can have a far and near vision for the formed image. Feel.

2‧‧‧ human eyes

21‧‧‧ retina

3‧‧‧Media unit

31‧‧‧Media materials

32‧‧‧ Carrier Group

321‧‧‧ Carrier

322‧‧‧Glossy

42‧‧‧Lighting element group

421‧‧‧Lighting elements

422‧‧‧Lighting elements

422‧‧‧Lighting elements

5‧‧‧Control unit

61‧‧‧Main light

62‧‧‧ polarized light

323‧‧‧Arc face

324‧‧‧ Carrier

325‧‧‧ glass substrate

326‧‧‧ plane

327‧‧‧Bevel

33‧‧‧Alignment membrane group

331‧‧‧Alignment film

34‧‧‧Electrical film group

341‧‧‧Electrical film

35‧‧‧Filter film group

351‧‧‧Filter film

4‧‧‧ display unit

41‧‧‧ bearing surface

621‧‧‧ rays

63‧‧‧Unpolarized light

631‧‧‧Main light

632‧‧‧ rays

Y‧‧‧ axis

‧‧‧ optical axis

P‧‧‧ real image

P`‧‧‧virtual image

D‧‧‧ spacing

S‧‧‧ video signal

θ 1‧‧‧ intersecting angle

θ 2‧‧‧ imaging angle

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a schematic view showing a conventional pupil imaging disclosed in the Patent No. I490545 of the Republic of China. Figure 2 is a schematic view of an imaging of the conventional pupil imaging device; Figure 3 is an incomplete front view showing a first embodiment of the imaging device capable of varying the imaging distance of the present invention; A schematic view of an image of a first embodiment; FIG. 5 is a partially enlarged side elevational view of the first embodiment The component group is used to generate a group of light rays; FIG. 6 is a schematic diagram of an optical path of the first embodiment; FIG. 7 is a block diagram of the first embodiment; and FIG. 8 is a front view showing the variation of the present invention. A second embodiment of an imaging device for imaging distance; and FIG. 9 is a schematic view of an optical path of the second embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3 and FIG. 4, a first embodiment of an imaging device capable of varying the imaging distance of the present invention is suitable for forming a real image directly on the retina 21 of the human eye 2, such as a point P, and forming a front in front of the human eye 2. Virtual image, such as point P'. Referring to FIG. 3, FIG. 5 and FIG. 6, the image forming apparatus comprises: a medium unit 3, a display unit 4, and a control unit 5 (FIG. 7).

The medium unit 3 includes a plurality of dielectric materials 31 that can be rotated, a carrier group 32 that houses the dielectric materials 31, an alignment film group 33, and a conductive film group 34. The medium material 31 is a medium capable of generating a birefringence phenomenon. In the present embodiment, a liquid crystal (Liquid Crystal) is used as the dielectric material 31, and is not limited thereto. Each of the dielectric materials 31 has an optical axis intersecting an axis Y and at an intersecting angle θ 1 . The carrier set 32 has a number carrier 321 arranged in an array. Each carrier 321 has a light exit surface 322. The light exit surface 322 has an arcuate surface portion 323 that is curved. The alignment film group 33 has a number alignment film 331 which is disposed in the carriers 321 and arranged to uniformly and uniformly dispose the dielectric materials 31. The conductive film group 34 has a plurality of conductive films 341 disposed in the carriers 321 and used to generate an electric field to rotate the dielectric materials 31.

It should be noted that the number of the carriers 321 is not limited to a plurality, and may be one in other variations of the embodiment. When the carrier group 32 has only one carrier 321, a number of arcuate faces 323 arranged in an array are formed.

The display unit 4 includes a carrying surface 41, and a plurality of light emitting element groups 42 formed on the carrying surface 41 and arranged in an array. In this embodiment, the bearing surface 41 is a curved surface. The light-emitting element groups 42 respectively have two light-emitting elements 421 and 422 with respect to the carriers 321 . The light-emitting elements 421 are respectively used to generate a chief ray 61 that travels straight along the axis Y direction. The light-emitting elements 422 are respectively configured to generate a straight line along the axis Y and along the polarization direction Polarized polarized light 62.

As shown in FIG. 6, the light passing through the dielectric material 31 in theory may be decomposed into two light rays (ordinary light & extraordinary light) because the above-mentioned dielectric material 31 has birefringence characteristics, but since the present invention passes through the aforementioned dielectric material The light of 31 is a kind of polarized light. Therefore, when the polarized light 62 generated by each of the light-emitting elements 422 travels straight along the axis Y and passes through the dielectric material 31, the polarization characteristics of the polarized light and the polarization direction thereof are caused. There is no ordinary light traveling along the axis Y, and an extraordinary light having an imaging angle θ 2 with the axis Y becomes the secondary ray 621. The secondary rays 621 pass through the arcuate portion 323 of the carriers 321 and travel straight toward the pupil of the human eye 2. Since the chief ray 61 also travels straight along the axis Y direction, the angle between each ray 621 and each of the chief ray 61 is the same as the imaging angle θ 2 . Thereby, each of the chief rays 61 and each of the rays 621 constitute a group of rays for imaging.

It should be noted that the imaging angle θ 2 depends on the optical axis of the dielectric material 31 The direction of the incident light, and in other words, as long as the optical axis of the dielectric material 31 When the intersecting angle θ 1 with respect to the axis Y changes, the imaging angle θ 2 changes.

In addition, it is worth noting that the number of the light-emitting element groups 42 is used to determine the resolution of the display unit 4. In this embodiment, each pixel (pixel) of the carrying surface 41 includes three light emitting element groups 42 capable of generating red, green, and blue colors, respectively. For convenience of explanation, each pixel in FIG. 3 is illustrated by only one light-emitting element group 42.

Referring to FIG. 6 and FIG. 7 , the control unit 5 is electrically connected to the medium unit 3 and the display unit 4, and controls the display unit 4 to generate the light groups according to an image signal S, and generates an electric field through the conductive films 341. Controlling the dielectric material 31 to rotate, changing the optical axis of each dielectric material 31 The angle of intersection with the axis Y is at an angle θ 1 .

Referring to Fig. 4 and Fig. 5, Fig. 6, and Fig. 7, the following is a convenient description. The real image P or the virtual image P' is represented by only one dot during imaging.

When the control unit 5 receives the image signal S, the image forming position is determined according to the image signal S, and an electric field is generated by the conductive film 341 to control the rotation of each of the dielectric materials 31 to change the light of each of the dielectric materials 31. axis The intersection angle θ 1 with respect to the axis Y causes the imaging angle θ 2 to vary with the intersection angle θ 1 .

Then, the control unit 5 generates the chief ray 61 and the polarized light 62 according to the image signal S to administer the illuminating elements 421 and 422, so that the chief ray 61 and the secondary ray 621 from the polarized light 62 are opposite to the human eye 2. The pupil travels straight and the retina 21 of the human eye 2 intersects to produce a real image P. At the same time, the chief ray 61 and the secondary ray 621 are opposite to the extension line of the real image P, and intersect in front of the human eye 2 to generate a virtual image P' spaced apart from the real image P by a distance D.

Thereby, it is only necessary to control the rotation of the aforementioned dielectric material 31 to change the optical axis of each of the dielectric materials 31. The intersection angle θ1 with respect to the axis Y makes the image insertion angle θ2 larger, so that the smaller the distance between the virtual image P' and the real image P, or the smaller the imaging angle θ2 , the virtual image can be made. The greater the distance between P' and the real image P, the more distant and near-visual feelings that can be produced.

It is worth noting that, as disclosed in the Patent No. I490545 of the Republic of China, or the wisdom glasses of Intel, it is necessary to form the real image P directly on the retina 21 of the human eye 2, and it is necessary to create a collimated light. And create collimated light There are many ways, for example, a polarized light traveling in a straight line generated by a Vertical Cavity Surface Emitting Laser (VCSEL) or a Fiber Laser, or a micro light source. For example, the light generated by the micro LED and the OLED cooperates with the lens to make the light travel straight in a predetermined direction after passing through the lens, and is used as a main ray. In other words, the OLED 421 may be a light-emitting diode laser or an optical fiber. Laser, or micro LED, or OLED, or other micro-light source, is not limited to this.

Referring to FIG. 8 and FIG. 9, a second embodiment of the present invention is substantially the same as the first embodiment, except that in the embodiment, the carrier group 32 has only one carrier 324. The carrier 324 has two glass substrates 325 spaced apart by a spacing. One of the glass substrates 325 has a number plane 326 formed on the inner or outer surface and arranged in an array, and a number of slopes 327 at an angle to the adjacent plane 326.

It should be noted that the number of the carriers 321 is not limited to one, and in other variations of the embodiment, a plurality of carriers 321 arranged in a matrix may also be used. When the carrier set 32 has a plurality of carriers 321, one of the glass substrates 325 of each carrier 321 has only one plane 326 and a slope 327 that is at an angle to the adjacent plane 326.

In the present embodiment, each of the light-emitting element groups 42 has only one light-emitting element 423 for generating an unpolarized light 63. Since the polarization direction of the unpolarized light 63 is arbitrarily distributed in space, when the non-vibration 63 passes through the opposite dielectric material 31 along the axis Y, it will be decomposed into two rays traveling in different directions, one of which is light. The light is made as the main ray 631, and travels along the axis Y straight line and passes through the respective plane portions 327, and the other extraordinary light is used as the secondary ray 632, and the imaging angle θ 2 with the axis Y.

It should be noted that the foregoing secondary ray 632 changes the traveling direction when passing through a plane perpendicular to the axis Y, and travels along the axis Y direction and is parallel to the chief ray 631. Therefore, the embodiment passes the slope 327. The design is such that the secondary ray 632 passes through the carrier 321 at a predetermined imaging angle θ 2 after being refracted.

Referring to FIG. 3 and FIG. 9, the principal ray 631 and the secondary ray 632 can be generated only by the unpolarized light 63 generated by the illuminating element 421, and can also be changed by simply rotating the dielectric material 31. The imaging angle θ 2 is such that the extension of the secondary ray 632 opposite to the real image P intersects at any point of the chief ray 631 opposite to the extension of the real image, and a virtual image P is formed at a distance from the real image P. `, in turn, can produce different far and near visual feelings.

It should be noted that, since the foregoing secondary ray 632 is derived from unpolarized light, the illuminating elements 423 may be micro LEDs, or OLEDs, or other micro-light sources, unless otherwise limited. Since the general knowledge in the art can infer the details of the expansion based on the above description, it will not be explained.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. The invention also uses the collimated light directly to image the retina. The purpose of miniaturization is to meet the needs of wearable devices that are light, thin, short, small, and power-saving.

2. It is important that the present invention uses a material having birefringence characteristics as a medium to generate a virtual image P' separated from the real image P by a different distance D by a secondary ray capable of changing the imaging angle θ 2 so that the human eye forms a It can have a far and near visual experience.

3. Further, the present invention can also be applied to 3D glasses, and the two imaging devices generate the same virtual image P' at different positions, so that the left eye and the right eye generate stereoscopic images with far and near changes due to aberrations.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

Claims (8)

An imaging device capable of varying an imaging distance, suitable for generating a real image in a retina of a human eye, and for generating a virtual image in front of a human eye, the imaging device comprising: a medium unit, including a device that can be rotated and used for generating a plurality of dielectric materials of birefringence; a display unit for generating a plurality of light groups, each light group having a principal ray traveling straight along an axis direction, and being refracted with respect to the axis by a relative dielectric material Imaging the primary light of the angle such that the primary ray and the secondary ray are adapted to intersect the retina of the human eye to produce the real image, and the primary ray and the secondary ray are opposite to the extension of the real image, and are suitable for use in the human eye The front side intersects to generate the virtual image at a distance from the real image; and a control unit is electrically connected to the medium unit and the display unit, and controls the display unit to generate the light groups according to an image signal, and controls the The media material is rotated such that the angle of the imaging changes as the material of the medium rotates. The image forming apparatus of claim 1, wherein the display unit comprises a plurality of light-emitting element groups that generate the light group, and the number of the light-emitting element groups is used to determine the resolution of the real image. The imaging device of claim 2, wherein the dielectric material is a liquid crystal and has an optical axis intersecting the axis and intersecting at an angle, and the control unit is controlled by an electric field. The dielectric materials are rotated to change the angle of the intersecting angle. The image forming apparatus of claim 3, wherein the medium unit comprises a carrier group for accommodating the dielectric materials, and an alignment film group and a conductive film group disposed in the carrier group. The image forming apparatus of claim 4, wherein the carrier group has at least one carrier having two glass substrates spaced apart by a distance, and wherein one of the glass substrates has a light group for each light group The at least one inclined surface through which the chief ray passes and is perpendicular to at least one plane of the chief ray and at an angle to the adjacent plane and for the secondary ray of each ray group to pass. The image forming apparatus of claim 4, wherein the carrier group has at least one carrier having a light-emitting surface adapted to face the human eye, the light-emitting surface having an arc shape and for each At least one arc face through which a group of rays passes. The image forming apparatus of claim 5 or 6, wherein each of the light-emitting element groups has a light-emitting element for generating an unpolarized light that is decomposed by the opposite dielectric material a principal ray that travels straight along the axis, and a secondary ray that forms an angle with the axis. The image forming apparatus of claim 5 or 6, wherein each of the light emitting element groups has two light emitting elements, wherein one of the light emitting elements is for generating a chief ray that travels straight along the axis direction, and the other of the light emitting elements For generating a polarized light traveling in the direction of the axis and polarized in a direction perpendicular to one of the axes of polarization, the polarized light forming a secondary ray by opposing the dielectric material.