JP2000112396A - Small-sized display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small-sized and lightweight display device which is easily attachable and detachable to and from the daily used spectacles of a wearing person and enables the wearing person himself or herself to adjust the mounting position to the spectacles. SOLUTION: Pads 6 of a display unit 2 are disposed on the outer side surfaces (the surfaces opposite to the face) of the spectacle lenses of the spectacles 1 and the pads (retaining parts) of clamps 3 are disposed on the inner side surfaces of the lenses. These pads hold the lens faces, to hold the display unit 2. The mounting position of the display unit is so regulated that display light is reflected by a combiner 5a and that display images appear on the slightly lower side of nearly the eye front of the wearing person.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art In recent years, there has been an increasing movement to use information devices represented by personal computers in environments other than desktop environments. The present invention is intended to realize a small-sized display device considering such use.

[0002]

2. Description of the Related Art As a device for displaying information for work support or education support, and performing work or the like based on the information,
There has been proposed a device in which an information device is in a wearable (wearable) form. When an information device is put into a wearable form, how to arrange a display is an important issue. For example, a structure in which a display is attached to a headset, such as headphones, or a structure in which a prism is attached to a spectacle lens and the display image of a display arranged on a side is adopted as those proposed so far. Some have adopted a structure in which an optical system and a display are arranged in a housing such as an eye mask.

[0003]

The above-mentioned conventional devices have been developed to reduce the load on the wearer by reducing the size and weight of the display device. However, coexistence with the spectacles has been a major bottleneck when the wearer regularly uses the spectacles. When trying to arrange the display unit avoiding the spectacle lens worn by the wearer,
In order to avoid inconvenience such as the display unit colliding with the spectacle lens during use, the display unit must be arranged with a space from the spectacle lens surface, and the distance from the eyeball to the first eyepiece optical element is increased. In the case of a large viewing angle of view, the optical element becomes large.
As a result, the display unit is necessarily large. Also, to hold the display unit in a position that is easy to see in front of the eyes, if the display unit is large, the part for fixing to the head also needs to be robust, and it is heavy overall and the weight balance is not good. turn into.

On the other hand, when a prism is attached to a spectacle lens and a display image of a display device arranged on the side is viewed, the above-mentioned problem can be solved because the same wearing as wearing glasses is possible. However, when the display is actually used, the spectacle wearer must change to wearing a contact lens, or be forced to remodel by attaching a prism to his or her own spectacles. There is a resistance. In addition, even if the prism is attached to a position where the wearer feels easy to see, it becomes difficult to see if the wearing state of the glasses changes, but there is a problem that it cannot be readjusted to maintain the positional relationship with the side display. Was.

Accordingly, the present invention has been made to solve the above-mentioned problems, and to provide a small and lightweight display device which can be easily attached to and detached from spectacles used daily by the wearer and which can adjust the position of the spectacles to be worn by the wearer. With the goal.

[0006]

In order to solve the above-mentioned problems, the present invention provides a display device, an optical system for enlarging and displaying a display image created by the display device, and integrating the display device with the optical system. A display unit comprising: a display unit; and a display unit provided with a clamp. That is, in the present invention, a clamp is provided on a display unit in which a display device and an optical system are integrally formed, and the display unit is attached so as to be in close contact with an outer surface of an eyeglass lens or the like.

[0007] Here, the display device is small enough not to disturb the field of view when it is attached as a display unit to, for example, a spectacle lens, and is sufficiently light in weight so as not to interfere with handling as spectacles. Needs to be The display device is preferably composed of a liquid crystal and a light source (backlight), but the display itself may be either a small CRT or a plasma display. The liquid crystal may be either a reflection type liquid crystal or a transmission type liquid crystal. Further, a method of forming an image by scanning laser light or LED light with a micro mirror may be used. In this case, the light source may be provided separately, and the light may be guided to the display unit by an optical fiber. In addition, light source (backlight)
A halogen bulb, a cold cathode tube, or an LED can be used, but an LED is preferable.

The optical system employs an aspherical non-coaxial reflective optical system having a structure in which an eyepiece optical element is brought as close as possible to the eyeball and a plurality of optical reflecting surfaces are combined. Specifically, for example, it is composed of a transmission type combiner and an optical element such as an aspherical reflection mirror. The combiner is
It functions as an eyepiece optical element and can be constituted by a half mirror or a hologram element. When a half mirror is used, the optical path of display light is changed by reflection, and when a hologram element is used, the optical path of display light is changed by diffraction. The optical element is not limited to a mirror system, and may be, for example, a prism using a plurality of three-dimensional surfaces as respective reflecting surfaces. In this case, one surface of the prism (emission-side reflection surface) acts as an aspherical reflection mirror.

The housing is not particularly limited as long as the display device and the optical system can be integrated, but an opaque member is preferable to block external light. The housing also needs to be small enough so as not to obstruct the field of view when attached to, for example, a spectacle lens or the like, and also sufficiently light in weight so as not to hinder handling as a spectacle or the like.

[0010] Examples of the clamp include a clamp that generates a pressing force on an object to be attached and is clamped by a display unit, a clamp having a structure like a laundry clamp, and a clamp that is simply hooked. Not done. Any device can be used as long as the display unit can be easily attached to and detached from the mounting target. The mounting direction is not limited, and may be any of a structure that is mounted from below, a structure that is mounted from above, and a structure that is mounted from the outside to the inside of the wearer. Further, an auxiliary lens may be provided in the mounting direction of the clamp, and the angle of view of the light emitted from the display unit can be widened by the auxiliary lens. Here, the mounting direction of the clamp means the upper part of the clamp holding part when attaching the clamp from below, the lower part of the clamp holding part when mounting from above, and the clamp when attaching from the outside to the inside of the wearer. It is inside the holding part.

[0011] Further, the object to be attached includes, for example, glasses, a hat, and a bandana, but is not limited thereto. If it is possible to make the eyepiece optical element of the display device as close to the eyeball as possible and widen the angle of view, Any object may be used. In addition, when it attaches to spectacles, it may be attached to a spectacle lens or to a frame. In addition, for a wearer who does not always use daily spectacles, unpretentious spectacles are used as the head-mounted part of the display unit. In a preferred mounting mode of the present invention, the display unit is disposed on the outer surface (opposite to the face) of the spectacle lens, and the pressing portion of the clamp is disposed on the inner surface of the lens. To keep. Even in this case, the structure in which the eyeglass frame or the like is used for holding on the face is used.

The display device of the present invention can be used to display the contents of work in various factories such as manufacturing factories and assembly factories, display educational information such as English conversation, famous places in sightseeing spots, historic sites, aquariums, botanical gardens, etc.
It can be applied to exhibits such as showrooms.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which the small display device of the present invention is mounted on spectacles. In FIG. 1, reference numeral 1 denotes spectacles used daily by the wearer. If the wearer does not regularly use the spectacles, a lens having no power is attached. Therefore, the spectacles are arbitrarily set spectacles, and the display unit 2 of the present invention is attached to the spectacles by the clamp 3 provided on the display unit. The wearer wears the glasses 1 to check whether the display is easy to see, and adjusts the mounting of the display unit 2 to a position where the user feels easy to see.

FIG. 2 is an enlarged view (external view) of the display unit 2 described above. Reference numeral 4 denotes a housing of the display unit 2, which is divided into front and rear portions (4a / 4b), and accommodates an optical system and a display device described later. The housing 4 itself is made of an opaque material, and the divided members 4a and 4b are joined by an adhesive. An emission window 11 for emitting display light from a display device housed in the housing is provided on an upper portion of the housing 4, and an eyepiece optic serving as a final reflection surface of an optical system is provided on the emission window 11. A combiner 5a, which is an element, is disposed to fold the display light toward the eyeball. In addition, a pad 6 serving as a receiving portion of a clamp described later is provided on a side surface of the housing 4.

Reference numeral 3 denotes a clamp. The clamp 3 includes a pad (holding portion) 3a, an arm 3b, and a torsion coil spring 3c, and an appropriate pressing force is generated via the pad 3a. This pressing force is applied to the spectacle lens of the spectacles 1 and is received by the pad 6 attached to the housing 4. An optical cable 7 for supplying power to a display device of the unit and transmitting an image signal is provided from a lower surface of the display unit 2. Note that the image signal is a video signal output from a computer,
It may be a video signal such as NTSC or PAL, and is not particularly limited to a digital image signal or the like. Therefore, the image signal generation source connected to the optical cable 7 is not particularly limited as long as it can generate an image signal.

FIG. 3 shows the internal structure of the display unit 2. Reference numeral 10 denotes a backlight unit of the display device, and LE
D10a and a backlight board 10b, and one of the power supplies from the optical cable 7 described above enters the backlight board 10b. Thereafter, it is supplied to the LED 10a via an analog switch (not shown). LED10
a, red, green and blue are arranged in an array on a small substrate,
The three colors are controlled to light sequentially. In addition, the backlight substrate 10b mainly includes an inverter including a switching circuit and a step-up transformer. 8
Denotes an image signal board, which comprises a signal generating circuit board 8b and a liquid crystal driving circuit board 8a. LCD drive circuit board 8a
A liquid crystal 9 is provided above. The liquid crystal 9 has a liquid crystal layer on which pixels and driving transistors are formed on a silicon base, and is a monochrome but very high-definition liquid crystal chip. A known substrate can be used as the image signal substrate 8. The other power supply of the power supply from the optical cable 7 and the video signal are supplied from 8b to 8a of the image signal substrate and supplied to the reflection type liquid crystal 9. The above-described backlight unit 10, image signal substrate 8, and liquid crystal 9 constitute a display device of the present invention.

Reference numeral 5 denotes an optical system using an eyepiece optical element of a half-mirror type. The combiner 5a and the aspherical reflection mirror 5b, which are the above-mentioned eyepiece optical elements.
Consists of Therefore, the light from the LED 10a is
After being reflected by the liquid crystal 9 for each pixel and reflected by the aspherical reflecting mirror 5b, it is reflected again by the combiner 5a to reach the eyeball.

FIG. 4 shows a state where the wearer wears the small display device of the present invention. The pad 6 of the display unit 2 is attached to the outer surface (the surface opposite to the face) of the spectacle lens of the spectacles 1 by the clamp 3.
Are arranged on the inner surface of the lens, and the display unit 2 is held by the glasses 1 by sandwiching the lens surface. The mounting position of the display unit is adjusted so that the display light is reflected by the combiner 5a and the display image appears slightly below the eyes of the wearer. Here, by making the display image appear on the lower side in front of the eyes, it is possible to reduce the narrowing of the field of view of the wearer. According to the present invention, by attaching the display unit 2 to the spectacles 1 by the clamp 3, natural attachment becomes possible.

In the above description, the optical system 5 uses a mirror system, but may be replaced with the prism 105 shown in FIG. In this case, the combiner 5a and the aspherical reflecting mirror 5b described above both serve as a reflecting surface of a display image.
5a and 105b, and the incident-side refracting surface 105d and the outgoing-side refracting surface 105c of the display light also serve as an optical system. In addition, the light from the LED 10a
By passing through 5e, a light collecting effect can be given. Reference numeral 9 denotes the liquid crystal described above.

The display unit and the clamp of the present invention are not limited to those described above, but may be those shown in FIG. 2
Reference numeral 2 denotes a display unit. In this modified example, a housing 14 of the display unit 22 houses a prism optical system 15 and a display device 19. Prism optical system 15
Is a refraction surface 15 on the exit window 111 provided in the housing 14.
c, and two reflecting surfaces 15a and 15b exist inside. The display device 19 includes the same components as those shown in FIG. 3, that is, the backlight unit, the image signal substrate, and the liquid crystal (all not shown), each of which is as described in FIG. The light reflected from the liquid crystal of the display device 19 is multiple reflected from the prism optical system 15b → 15a,
It reaches the emission window 111 provided in the housing 14.

Further, reference numeral 13 denotes a clamp disposed inside the eyeglass lens (not shown) (on the side of the wearer), and an auxiliary lens 205 is provided at the tip thereof. The arm 13b of the clamp 13 has an auxiliary pad 13 in addition to the center pad 13a.
e, 13f are attached. Also, a separate restoration spring 1
3c and 13d are mounted on the arm 13b. The arm 13b of the clamp extends to the opposite side of the housing 14 to form a lever 13g. 13 g of this lever is
By pressing to the side, the clamp 13 separates from the spectacle lens surface and the holding is released. Reference numeral 16 denotes a housing-side pad. With such a configuration, by sandwiching the spectacle lens between the center pad 13a of the clamp 13 and the housing-side pad 16, the auxiliary lens 205 can be incorporated on the side closer to the eyeball of the spectacles. Thereby, even with the small-sized display of the present invention, it is possible to provide a configuration capable of widening the angle of view.

Further, the present invention is not limited to the above configuration,
For example, the above embodiment has a structure in which the display unit is attached from below the spectacle lens, and a structure in which the display unit is attached from above,
A structure that attaches from the outside to the inside of the face may be adopted. Further, the clamp may have a structure in which the arm is extended downward and the housing is also extended, so that the clamp can be pinched like a washing pinch. Furthermore, in the above embodiment, the clamp presses the pad directly against the lens surface,
You may employ | adopt the clamp structure which hooks on the frame of spectacles. Further, the optical system may have a configuration in which a reflection surface or a refraction surface further exists. Further, a flat reflecting surface may be added. Further, the liquid crystal may be of a transmission type.
In this case, the LED will be on the opposite side of the liquid crystal from the optical system. The housing may be designed to protrude forward depending on the internal configuration.

[0023]

According to the present invention, a small and lightweight display device can be realized. In addition, since it can be easily attached to and detached from eyeglasses used daily by the wearer, usage is not restricted by the wearer. Furthermore, since the wearer can adjust the position of wearing the spectacles on his / her own, it is possible to attach it to a position that is easy to see.

[Brief description of the drawings]

FIG. 1 shows the device of the present invention mounted on eyeglasses.

FIG. 2 is an enlarged view of a display unit.

FIG. 3 is a diagram showing an internal structure of the display unit.

FIG. 4 is a view showing a display device of the present invention worn by a wearer.

FIG. 5 is a diagram showing an example in which the optical system of FIG. 3 is replaced with a prism.

FIG. 6 is a diagram showing another modified example of the present invention.

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Claims (7)

[Claims] 1. A display unit comprising: a display device; an optical system for enlarging and displaying a display image created by the display device; and a housing for integrating the display device and the optical system. A small display device comprising a clamp provided on the display unit. 2. The small display device according to claim 1, wherein a clamp provided on the display unit is attached to a spectacle lens or a spectacle frame. 3. The display unit is disposed on the outer surface (opposite to the face) of the spectacle lens, and the clamp presser is disposed on the inner surface of the lens, and these hold the display unit by sandwiching the lens surface. 3. The small display device according to claim 2, wherein: 4. The small display device according to claim 1, wherein an auxiliary lens is provided in a mounting direction of the clamp, and light emitted from the display unit is projected on the auxiliary lens. 5. The small display device according to claim 1, wherein the optical system is configured by combining a plurality of optical reflection surfaces. 6. The small display device according to claim 5, wherein the optical system has a prism using a plurality of three-dimensional surfaces as respective reflecting surfaces. 7. The small display device according to claim 1, wherein the display device comprises a reflection type liquid crystal or a transmission type liquid crystal.