JP2546492Y2 - Display device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In the invention, the display image of the display unit provided in the helmet is reflected by a shield so that the display information can be visually recognized in a state where the helmet is mounted. Related to the device.

[Conventional technology]

Conventionally, for example, in aircraft, helicopters, etc.
It is known that a display device for displaying display information such as the speed is mounted on a helmet worn by a pilot.

FIG. 12 is a view showing an example of such a conventional display device, in which an LED display 32 is disposed inside the upper part of a helmet 31, and display information of the LED display 32 is displayed on a prism 3.
By displaying the information on the inside of the shield 34 of the helmet 31 via 3, the display information on the LED display 32 is visually recognized.

However, in such a device, there are problems that the center of gravity of the helmet is high and the usability is not good, and that members such as the prism 33 are close to the eyes and are cumbersome.

For this reason, for example, as shown in FIG. 11, a display unit 21 for displaying display information is arranged on the chin 22a of the helmet 22, and a display image from the display unit 21 is displayed on the helmet 22.
The present inventor has invented a display device in which light is reflected by the shield 23 of 22.

[Problems to be solved by the invention]

By the way, as a display unit used in this type of device, a display unit that projects a display of a display device toward a shield via an optical system such as a lens in consideration of a distant display or the like is preferable. Since the range in which the display can be seen when the unit is desired, that is,
As shown in FIG. 10, when the viewpoint positions are different due to individual differences between users, a part of the display may be cut off.

For example, at the viewpoint positions B and C above and below the correct viewpoint position A as shown in FIG. 3A, the upper and lower portions of the display image are cut off, and as shown in FIG. At the viewpoint positions B and C, the left and right portions are cut off.

For this reason, the present inventor has invented a display device in which the display unit can be manually swung back and forth and left and right so that the direction of the display unit can be adjusted as necessary.

However, in this display device, it is necessary to manually adjust the display image while viewing the display image reflected on the shield. In addition, even in such a device that can adjust the orientation of the display unit, the appropriate adjustment position is determined by the user, so that it can be automatically adjusted using a driving source such as a motor. It was difficult.

According to the present invention, in a display device in which a display image provided by a display unit provided in a helmet is reflected by a shield so that display information can be visually recognized in a state where the helmet is mounted, an appropriate display can be visually recognized according to a viewpoint position. It is an object to make the display unit movable and to automatically adjust the orientation of the display unit by a simple operation.

[Means for solving the problem]

The display device of the present invention made in order to solve the above-mentioned problem, the display light of the display unit arranged inside the chin portion of the helmet is reflected by the shield of the helmet to form a virtual image of the display image in front of the helmet. A display device formed so that a virtual image of a display image can be visually recognized through a shield from the inside of the helmet, wherein one point in or near an optical axis of display light in the display unit is swung. A unit driving unit that changes the tilt of the display unit as a center, a reference light source that forms a reference virtual image indicating a mirror image position of the swing center when the shield is viewed from within the helmet, and a tilt of the display unit. A tilt detecting means for detecting, a transparent touch panel disposed on an outer surface of the shield, a tilt in a line-of-sight direction passing through a pressing point on the touch panel, and the display unit. Control means for detecting a deviation from the inclination of the display unit and controlling the inclination of the display unit by the unit driving means so as to correct the deviation, wherein a mirror image of the oscillation center indicated by a virtual image of the reference light source is provided. By pressing a point on the shield corresponding to the position via the touch panel, the optical axis of the display light on the display unit is directed in the line of sight.

[Action]

In the display device of the present invention, the display light of the display unit arranged inside the chin of the helmet is reflected by the shield of the helmet, and a virtual image of the display image is formed in front of the helmet. Thereby, the user can visually recognize the virtual image of the display image through the shield of the helmet.

On the other hand, the virtual image of the reference light source indicates a mirror image position of the swing fulcrum when the shield is viewed. Also, when the touch panel arranged on the outer surface of the shield is pressed,
The control means detects a deviation between the inclination of the line of sight passing through the pressing point on the touch panel and the inclination of the display unit, and controls the inclination of the display unit so as to correct the deviation. Therefore, the user presses, via the touch panel, a point on the shield corresponding to the mirror image position of the swing center indicated by the reference light source, whereby the optical axis of the display light in the display unit is directed in the line of sight, An appropriate display can be visually recognized.

〔Example〕

 FIG. 1 is a diagram showing a display device according to an embodiment of the present invention.

This device is applied to a helmet worn by a driver such as a motorcycle, and has a front helmet body 1 provided with an opening for visual recognition in the front, and a transparent shield 2 disposed in the opening. I have. On the outer surface of the shield 2, a transparent touch panel 3 for detecting the position of the pressed point when pressed with a finger or the like is provided. In the figure, the part of the touch panel 3 of the shield 2 is partially broken.

As the touch panel 3, a matrix type touch panel in which a large number of contact switches made of transparent electrodes are arranged in a matrix to obtain the coordinate information of the pressed point by making the contact switch of the pressed point conductive, and An analog touch panel or the like in which a voltage is applied to the transparent conductive film to detect the potential of the pressed point to obtain coordinate information of the pressed point can be used.

Inside the chin cover (chin portion) 1a of the helmet body 1, there is a display unit 4 in the shape of "K",
Display light emitted from the upper surface of the display unit 4 is reflected by the shield 2 and directed into the helmet main body 1.
Then, when viewed from the viewpoint E in the helmet main body 1, a virtual image I of the display image is visually recognized in the front view through the shield 2.

In the chin cover 1a, a unit drive mechanism 5 for changing the direction of the display unit 4 as described later,
An angle sensor 6 for detecting the orientation of the display unit 4 and a control circuit 7 for controlling the unit driving mechanism 5 based on signals from the touch panel 3 and the angle sensor 6 are provided.

Then, as described later, when a point on the touch panel 3 is pressed, the control circuit 7 identifies the position of the pressed point with respect to the shield 2, performs angle detection by the angle sensor 6, and controls the unit drive mechanism 5. , The display unit 4 is turned in the direction of the identified pressing point.

FIG. 2 is a view showing an optical system of the display unit 4. As shown, a display device 41 such as a fluorescent display tube is provided on the inner bottom of the display unit 4, and a reflection mirror is provided on the inner surface of the bent portion. 42, and a lens system 43 such as a convex lens is provided near the upper opening 4a. The display light from the display device 41 is reflected by the reflection mirror 42 and is
It is directed to the shield 2 via 43.

The display surface of the display device 41 is set so as to be within the focal point of the lens system 43. When the opening 4a is desired, the display image of the display device 41 is displayed on the display device 41 by the magnifying action of the lens system 43. In addition to being enlarged from the actual display pattern, it is visually recognized at a position optically deeper than the display device 41.

That is, the virtual image of the display image of the display device 41 is
43 is formed at a distance on the extension of the optical axis L, and is displayed at a distance when viewed through the shield 2. Therefore, the user can easily focus on the eyes, and the display device has good visibility.

Note that, when the distantly magnified display is performed in this manner, the entire virtual image can be visually recognized from the relationship between the size of the opening 4a and the virtual image and the distance from the virtual image to the opening 4a (viewing range).
Becomes narrower, as described with reference to FIG.
If the viewpoint is not optically on or near the extension of the optical axis L, the entire virtual image cannot be visually recognized. Therefore, it is necessary to adjust the position of the display unit 4.

FIG. 3 is a perspective view showing a mounting portion of the display unit 4 in the chin cover 1a, and FIG. 4 is a side view and a front view thereof.

In the figure, 11 is a fixed box formed in the chin cover 1a, 51 is a unit coupler holding the display unit 4, 52 is an X-axis driving mechanism, 53 is a Y-axis driving mechanism, and this unit coupler 51, X-axis The drive mechanism 52 and the Y-axis drive mechanism 53 constitute the unit drive mechanism 5.

On the front side of the fixed box 11 (the tip side of the chin cover 1a), a unit coupler 51 is provided with a support pin 51a near its upper end.
The unit coupler 51 has holding arms 51b ₁ and 51b ₂ formed at both upper ends thereof so as to project forward. The holding arms 51b ₁ and 51b ₂
The display unit 4 is located between the left and right sides of the opening 4a.
It is pivotally supported so as to be able to swing back and forth about support shafts 41 ₁ and 41 ₂ attached to points.

And a support pin 51a for supporting the unit coupler 51 is provided.
The pivot axis X and the holding arm 51b _1, the support shaft 4 which is pivotally supported at 51b ₂
The rotation axis Y of 1 ₁ , 4 _{1 2} is orthogonal to the rotation axis Y, and the display unit 4 sets the intersection of the rotation axis X and the rotation axis Y as the swing center O with respect to the fixed box 11 (to the helmet body 1). The orientation is variable.

As shown in FIG. 4A, the X-axis driving mechanism 52
By driving the shaft driving motor 52a, the support pin 51a is rotated via the reduction gear 52b to swing the display unit 4 as indicated by the arrow in FIG. The Y-axis driving mechanism 53 includes a Y-axis driving motor 53a fixed to the unit coupler 51.
By driving the pinion 53b, the display unit 4 is meshed with the pinion 53b and the arc-shaped rack 53c attached to the side surface of the display unit 4 is moved to move the display unit 4 as shown by the arrow in FIG. Rock it.

The X-axis drive mechanism 52, X angle sensor ₆₁ is disposed at a position of the reduction gear 52 b, the support shaft 41 ₁ and the unit coupler 51
In the vicinity of the holding arms 51b ₁ of, Y angle sensor 6 ₂ are disposed. Then, depending on the swing position of the display unit 4, X angle sensor ₆₁ and the Y angle sensor _{6. 2,} the rotary axis X of the swing angle and the rotation axis Y around the rocking from a preset position Each moving angle is detected, and each detection signal is input to the control circuit 7. As such the angle sensor, it is possible to use a potentiometer or the like in conjunction respective reduction gear 52b and the support shaft 41 _1.

As shown in FIG. 3, on the side surface near the opening 4a of the display unit 4 and on the surface opposite to the support pin 51a, a mechanism portion 44 which bulges the case is formed. Is provided with a support rod 45 to which an LED 8 as a reference light source is attached at the upper end.

FIG. 5 is a view showing the inside of the mechanism section 44. A motor 47 for moving the LED is connected to a rotation shaft 45a of a support rod 45 via a reduction gear 46.
The support rod 45 is rotated by the driving of the motor 47 as shown by the arrow in the figure. This rotation range is set according to the rotation direction of the motor 47 and the drive amount set in advance.
As shown in the figure, the LED 8 at the upper end of the support rod 45 has the opening 4a.
And a state in which the LED 8 is housed in the case has an angle range of 90 °. In addition, support rod 45
Is rotated to the center side of the opening 4a, the position of the LED 8 is set to coincide with the intersection of the rotation axis X and the rotation axis Y, that is, the swing center O.

FIG. 7 is a block diagram of the embodiment.
Microcomputer, each motor 52a, a drive circuit for driving the 53a, 47 independently, an input circuit for inputting the coordinates of the pressing point in the driving circuit, a touch panel 3 for turning on and off of the LED 8, X angle sensor ₆₁ and the Y angle sensor is constituted by an input circuit for inputting an angle signal from the 6 _2, this control circuit 7, the motors 52a, 53a, 47, LED 8, the touch panel 3, X angle sensor 6 _1, Y angle sensor 6 _2, the power supply circuit 9
And manual switch 10 to be operated at the start of angle adjustment
Are connected respectively.

FIG. 8 is an example of a flowchart showing a control flow by the microcomputer of the control circuit 7, and this control flow is started when an interrupt is generated by operating the manual switch 10.

When the manual switch 10 is turned on, the motor 47 is driven to move the LED 8 to the position of the swing center O and stop (step S ₁ ), turn on the LED 8 (step S ₂ ), and monitors the input (step S _3).

Here, the touch panel 3 is pressed, reads the coordinate values on the touch panel 3 from the input signal to detect an input (Step S _4).

Then, based on the read coordinate values on the touch panel 3 and the coordinate values of the swing center O stored in advance, the direction (line of sight) of a point on the shield 2 corresponding to the pressed point from the swing center O is determined. seek (step S _5). The direction of the line of sight is based on the direction of the optical axis L when the display unit 4 is in a preset direction (reference optical axis direction).
The rotation angle and the rotation angle Y are determined as the rotation angle.

Further, X angle sensor ₆₁ and an angle signal from the Y angle sensor 6 ₂ respectively input, the current direction, the angle of the pivot axis X about which the reference optical axis direction on the standard of the optical axis L of the display unit 4 And an angle about the rotation axis Y (step S ₆ ).

Next, the viewing direction of the angle calculated in step S _5, by subtracting the current direction angle of the optical axis L calculated in step S _6,
About pivot axis X around the respective pivot axis Y around obtain the correction angle (step S _7).

Then, the motor 52a and the motor 53a are rotated in the rotation direction determined based on the correction angle so that the optical axis L faces the line of sight.
Rotationally driving preparative independently (Step S _8), while the angle signal from the X angle sensor ₆₁ and the Y angle sensor 6 ₂ type, respectively (Step S _9), pivot axis X around the rotation axis Y for each around monitors a match between the angle and the viewing direction of the current angle of the optical axis L (step S _10, step S _12).

When a match is detected around the rotation axis X, the motor 52
Stop a (step S _11), coincides with the rotation shaft Y around stops when it is detected the motor 53a (step S _13).

When both the motor 52a, is 53a and both stops angle correction is completed, stores the LED8 by driving the motor 47 on the display unit 4 of the case by turning off the LED8 (step S _14).

FIG. 9 illustrates the above angle correction, for example, about the rotation axis Y.

That is, as shown in FIG. 3A, before the angle correction, the optical axis L of the display unit 4 is directed to the direction in which the reflection condition is not satisfied on the surface of the shield 2 with respect to the viewpoint E.
The image of the LED 8 that emits light at the position of the swing center O can be visually recognized by the shield 2 at a point P that satisfies the reflection condition.

Then, when the user presses a point on the touch panel 3 corresponding to the point P while watching the image of the LED 8, the above-described control is performed and the user rotates the correction angle θ, and as shown in FIG. The axis L is directed to the point P. Here, since the optical axis L passes through the position (oscillation center O) of the LED 8 when the user presses the touch panel 3, the optical axis L is optically directed to the viewpoint E. Therefore, the appropriate display of the display unit 4 can be visually recognized from the viewpoint E. In the example shown in FIG. 9, the correction about the rotation axis Y, that is, the vertical movement of the display position has been described. However, the correction about the rotation axis X, that is, the horizontal movement of the display position, is similarly angle-corrected.

As described above, the user can automatically adjust the direction of the display unit 4 simply by pressing the position where the LED 8 can be seen, so that an appropriate display can be visually recognized according to the viewpoint position. Further, since the adjustment is simple, it is possible to use a display unit in which the display is likely to be cut off or the like, so that the diameter of the optical system can be reduced and the display unit can be downsized. Further, an effect is obtained that external light hardly enters the display unit by reducing the aperture.

In the above embodiment, one LED 8 that emits light at the position of the oscillation center O is used as the reference light source. However, the reference light source of the present invention uses the position of the oscillation center O by the image reflected by the shield. May be instructed to the user.
For example, a plurality of point light sources are disposed around the display unit 4 so as to surround the opening 4a around the swing center O, and the reflection images of the shields of the plurality of point light sources are visually recognized by the user, and the plurality of point light sources are visually recognized. The swing center O may be instructed so as to press the center of the image. Further, a frame like the opening 4a may be used.

[Effect of the invention]

As described above, according to the display device of the present invention, in the display device in which the display image of the display unit provided in the helmet can be visually recognized above the display by reflecting the display image with the shield, A reference light source that indicates the mirror image position of the swing center when looking at the shield from the inside of the helmet, and a transparent touch panel arranged on the outer surface of the shield Is provided, and the tilt of the display unit is controlled so as to correct the deviation between the tilt of the viewing direction passing through the pressing point on the touch panel and the tilt of the display unit, so that the mirror image of the center of oscillation indicated by the virtual image of the reference light source is provided. By pressing a point on the shield corresponding to the position via the touch panel, the optical axis of the display light on the display unit is directed to the line of sight Because it was Unishi, only a simple operation, it can be automatically adjusted to a proper position according to the orientation of the display unit in the viewing position.

[Brief description of the drawings]

FIG. 1 is a view showing a display device of an embodiment of the present invention, FIG. 2 is a view showing an optical system of a display unit in the embodiment, FIG. 3 is a perspective view showing a mounting portion of the display unit in the embodiment, FIG. FIG. 5 is a side view and a front view of the mounting portion, FIG. 5 is a diagram showing the inside of the mechanism in the embodiment, FIG. 6 is a diagram for explaining the movement range of the LED in the embodiment, and FIG. Block diagram, FIG. 8 is a flowchart in the embodiment, FIG. 9 is a diagram illustrating angle correction in the embodiment, FIG. 10 is a diagram illustrating disconnection of display caused by a difference in viewpoint position, FIG. FIG. 12 is a diagram illustrating an example of a display device in which a display unit is arranged on a jaw portion. FIG. 12 is a diagram illustrating a conventional example of a display device that performs display on a shield of a helmet. 1 ... helmet body, 2 ... shield, 3 ... touch panel, 4 ... display unit, 5 ... unit drive mechanism, 6 ... angle sensor, 7 ... control circuit, 8 ... LE
D.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-44984 (JP, U) JP-A-3-52771 (JP, U) JP-A-56-152460 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] A display light of a display unit arranged inside a chin portion of a helmet is reflected by a shield of the helmet to form a virtual image of a display image in front of the helmet, and a shield is passed through from inside the helmet. A display device in which a virtual image of a display image can be visually recognized by using a unit driving means for changing a tilt of the display unit around a point within an optical axis of display light in the display unit or a point near the optical axis as a swing center. A reference light source that forms a reference virtual image indicating a mirror image position of the swing center when the shield is viewed from within the helmet; a tilt detection unit that detects a tilt of the display unit; and an outer surface of the shield. A transparent touch panel disposed, and detecting a deviation between a tilt of a line of sight passing through a pressing point on the touch panel and a tilt of the display unit. Control means for controlling the inclination of the display unit by the unit driving means so as to correct the deviation, wherein a point on the shield corresponding to a mirror image position of the swing center indicated by a virtual image of the reference light source is set to the touch panel. A display device characterized in that an optical axis of display light in a display unit is directed in a line-of-sight direction by being pushed through the display unit. 2. The display device according to claim 1, wherein the display unit is pivotally supported by two orthogonal axes, and an intersection of the two axes is the swing center. 3. The display device according to claim 1, wherein the reference light source is a point light source movably arranged at a position of the swing center.