JP4595604B2 - Portable display device - Google Patents

Description

  The present invention relates to a glasses-type portable display device that can be worn on a head and a nose to view an image.

  Recently, various portable display devices (commonly known as head-mounted displays (HMD)) that are intended to be used for viewing video images, personal computer screens, etc. with head-mounted on the head and glasses on the nose. Has been proposed. These portable display devices can watch video images even in a narrow space such as a commuter train, and are extremely convenient devices. However, the load of the portable display device is applied to the head and nose. In order to use continuously, it is strongly required to maintain a light wearing feeling.

2. Description of the Related Art Conventionally, in a head-mounted portable display device disclosed in, for example, Japanese Patent Laid-Open No. 11-202797, a plurality of hinge portions are provided in the middle of a head-mounted frame, thereby reducing the weight of the mounting portion. The urging force necessary for mounting is obtained. In the glasses-type portable display device disclosed in Japanese Patent Application Laid-Open No. 2003-329965, an exterior cover is attached to a display unit that displays an image, and a frame is attached to the left and right of the exterior cover. A nose pad portion is provided on the exterior cover to obtain a shape suitable for mounting on the nose.
Japanese Patent Laid-Open No. 11-202797 JP 2003-329965 A

As described above, in the conventional portable display device, the head-mounted type and the glasses type are used. However, since the position at the time of wearing the head-mounted type changes each time, it takes time for positioning or a cap. For example, the glasses type tends to be preferred because of the drawbacks that it is difficult to wear the camera. However, in a portable display device of the type that hangs on the nose, the final shape weight is about 100 g, which is about six times the weight of normal glasses. For this reason, if the frame structure is the same as that of the glasses, there is a problem that the load applied to the nose is large, pain occurs in the nose, causing discomfort, making it difficult to use for a long time.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a portable display device that has a small load applied to the nose and is excellent in wearing feeling.

In order to achieve the above object, a portable display device according to the present invention receives a video signal and an audio signal from the outside, performs signal processing to display an image, and a drive circuit that drives an output unit that outputs audio. An optical unit that guides an image created on the display device to a user's eye, a power supply unit for operating the drive circuit, and a spectacle-shaped housing that houses the display device, and a nose pad In the present invention, a load reducing mechanism is provided for reducing the load on the nose pad by urging the casing toward the head .
In a second aspect of the portable display device according to the present invention, the load reducing mechanism includes a hinge portion having a restoring spring member at the center of the casing.
Further, in the third aspect of the portable display device of the present invention, a load reducing mechanism is provided with a spring member made of a superelastic alloy at the center of the casing.

  The portable display device according to the present invention makes it possible to make the load applied to the nose portion a value less than half of the load of the present device by giving an appropriate head hold feeling at the time of wearing. Greatly improved. In addition, the nose pad portion can be rotated, and any nose shape can be accommodated.

The portable display device provided by the present invention has the following features. The first feature is that it uses a display device that receives an image signal and an audio signal from the outside and performs signal processing to display an image, a drive circuit that drives an output unit that outputs sound, and an image created in the display device An optical unit that leads to the eyes of a person, a power supply unit for operating the drive circuit, and a spectacle-shaped housing that houses the display device, and a load reducing mechanism is provided at the center of the housing. The second feature is that the load reducing mechanism is provided with a hinge portion having a restoring spring member in the central portion of the casing, and the third feature is that the load reducing mechanism is a spring member made of superelastic alloy in the central portion of the casing. It is in the point where it was installed.
Therefore, the basic configuration of the best mode is a portable display device having the configuration including the first and second features.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a top view (A) and a front view (B) of a portable display device 1 according to the present invention, and FIG. 2 is a front view (A) with the frame covers 2B and 3B shown in FIG. 1 (A) removed. The right side view (B) and the left side view (C) are shown.

  As shown in FIG. 1, the portable display device 1 includes a frame assembly 2 formed by screwing a frame 2A having a curved surface that fits the right head and right face and a frame cover 2B provided with a see-through portion 2C. A frame assembly 3 formed by screwing a frame 3A having a curved surface that fits the left head and the left face and a frame cover 3B provided with a see-through portion 3C, and the frame assemblies 2 and 3 are coupled to the left and right. And a hinge part 4 having a function of applying an urging force in a closing direction thereto, and a nose pad part 5 that is rotatably screwed to the lower side of the hinge part 4 and attached to the nose part. . The frame assembly 2 is provided with an earphone unit 6 for outputting sound and a plug 8 for receiving an external video signal via an electric cord. The earpiece unit 6 is used as a pair with the earphone unit 6 in the frame assembly 3. 7 is attached via an electric cord.

  As shown in FIG. 2, the frame 2A is a self-luminous display element 11 such as a field emission display (FED) that converts an external video signal such as a video signal to display an image, and the self-luminous display element 11. A driving board 12 on which a circuit and components for driving the image are mounted, an optical unit 13 for displaying an image on the self-luminous display element 11 in the field of view of an observer, and volume and luminance for adjusting volume and image luminance. The adjustment switch 9 is accommodated, and the frame 3 </ b> A accommodates a power supply unit 14 for driving the drive substrate unit 12. The frames 2A and 3A are also provided with see-through portions 2C and 3C, respectively, so that the state of the outside world can be observed simultaneously with the image created by the self-luminous display element 11. .

  FIG. 3 shows an enlarged top view (A) and an enlarged front view (B) of the hinge portion 4. The hinge portion 4 includes an L-shaped member 41 formed by connecting a cylindrical portion 41a and an L-shaped portion, and an L-shaped member 42 formed by connecting an L-shaped portion and a cylindrical portion 42a inserted into the inner diameter of the cylindrical portion 41a. , A rotation stopper 43 for limiting the rotation angle of the L-shaped members 41 and 42 by being fitted into these upper portions, a coil spring 44 for biasing the L-shaped members 41 and 42, and the L It is comprised from the screw | thread 45 which integrally connects the mold members 41 and 42, the said rotation stopper 43, and the said nose pad part 5 rotatably. As the material of the coil spring 44, in addition to a normal spring material such as phosphor bronze, for example, a super elastic alloy such as Fe-Al series or Ti-Ni series can be used.

  The rotation stopper 43 has four oblique sides 43A, 43B, 43C, and 43D at the periphery of the second-stage paragraph from the top, as shown by the one-dot chain line in FIG. As a result, when the frame assemblies 2 and 3 are opened outward, the inner wall of the L-shaped member 41 hits the hypotenuse 43A, and further opening is restricted. Similarly, the L-shaped member 42 can be opened to a range corresponding to the hypotenuse 43B, but further opening is limited. If the frame assemblies 2 and 3 are to be closed inward, the L-shaped member 41 hits the oblique side 43C and the L-shaped member 42 hits the oblique side 43D and cannot be closed any further.

The total load of this device is P ₀ , the tightening force to close the frame assemblies 2 and 3 when the head is mounted is P ₁ , the coefficient of friction between the head and the frame assemblies 2 and 3 is μ, and the rotational moment load P ₂ according to the nose ignoring the action is expressed by the following equation.
P ₂ = P ₀ −μP ₁
That is, the load P ₂ according to the nose larger the clamping force P ₁ to be close to the frame assembly 2, 3 is small. However, since the discomfort is too strong tightening force of the head arise, it is necessary to use a coil spring 44 having a spring force such as fastening force P ₁ is an appropriate value.

  Next, another embodiment of a spring member that can be used in place of the coil spring 44 of the hinge portion 4 will be described. FIG. 4 is a top view (A) and a side view (B) of a spring member 44A using a pipe member made of a superelastic alloy. FIG. 5 is a top view (A) and a side view (B) of a spring member 44B using a plate member made of a superelastic alloy. These can be used by replacing the inner diameter of the coil spring 44 with the contact shape with the L-shaped members 41 and 42 and the spring force. Further, FIG. 6 shows a top view (A) and a side view (B) of the hinge portion 4A using the wire 44C made of superelastic alloy. The wire 44C is inserted and fixed to the L-shaped members 41 and 42. ing.

  The portable display device of the present invention can withstand long-term use because the entire load is divided and applied to the head and nose as shown in the configuration of the above-described embodiment. In addition, this invention is not limited to the structure and shape by the said Example, For example, you may use a some spring member as the hinge part 4. FIG.

  The present invention is used in a portable display device that is worn on the head and nose to watch an image.

1A and 1B are a top view and a front view, respectively, showing an external appearance of a portable display device according to an embodiment of the present invention. FIG. 2 is a front view (A), a right side view (B), and a left side view (C) showing an internal configuration of a portable display device according to an embodiment of the present invention. It is the upper surface enlarged view (A) and front surface enlarged view (B) which show the structure of the hinge part 4 concerning an Example. It is the top view (A) and side view (B) of 44 A of spring members concerning an Example. It is the top view (A) and side view (B) of the spring member 44B concerning an Example. It is the top view (A) and side view (B) which show the structure of 4 A of hinge parts concerning an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable display apparatus 11 Self-luminous display element 12 Drive board part 14 Power supply part 2, 3 Frame assembly 2A, 3A Frame 2B, 3B Frame cover 2C, 3C See-through part 4, 4A Hinge part 41, 42 L-shaped member 41a, 42a Tube part 43 Rotation stopper 43A, 43B, 43C, 43D Slope side 44 Coil spring 44A, 44B Spring member 44C Wire 45 Screw 5 Nose pad part 6, 7 Earphone part 8 Plug 9 Volume / brightness adjustment switch

Claims (3)

A display device that receives an image signal and an audio signal from the outside and performs signal processing to display an image, a drive circuit that drives an output unit that outputs sound, and an image created on the display device is guided to a user's eye An optical unit, a power supply unit for operating the drive circuit, and a spectacle-shaped housing for housing the display device, and a nose pad, and the nose by urging the housing toward the head A portable display device comprising a load reducing mechanism for reducing a load on a pad . The portable display device according to claim 1, wherein the load reducing mechanism includes a hinge portion having a restoring spring member at a central portion of the housing. The portable display device according to claim 1, wherein the load reducing mechanism includes a spring member made of a superelastic alloy at the center of the casing.

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