JPH03249890A - Display device with camera - Google Patents

Abstract

PURPOSE:To photograph a user's face from the front by a camera in a state that a monitor image for reflecting a user on a display is looked at from the front by turning simultaneously user's eyes to both of the camera and the display. CONSTITUTION:On a principal optical axis F3, an optical means 5 which can allow light to transmit through and can reflect light is placed, and on the transmission side of the principal optical axis F3 to the optical means 5, either one of a camera 3 or a display 6 is placed, and on the opposite side of the principal optical axis F3 to the optical means 5, the other one of the camera 3 or the display 6 is placed. In such a way, by placing eyes F1 of a user P on the principal optical axis F3, its eyes F1 can be turned simultaneously to both of the camera 3 and the display 6. In such a way, in a state that a monitor image (face of the other party) in which the user P is reflected on the display 6 is looked at from the front, a face of the suer P can be photographed from the front by the camera 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera-equipped display device that is suitable for use in video telephones, video intercoms, and the like.

[Summary of the Invention] The present invention 8Ac. By configuring the display device with a camera so that the user's vision IiI can be directed to both the camera and the display at the same time, the user can be seen on the display. While looking directly at the monitor image (the other party's face).

5 so that the user's face can be photographed from the front with a camera.

[Conventional technology]

The conventional video phone is as shown in the fourth prisoner.

A cathode ray tube (CRT) 2 serving as a display is disposed on the front face 1a of the cabinet 1, and a camera 3 serving as a television camera is disposed above the cathode ray tube 2 on the front face 1a.

Then, the face of the user (the person making the call) P is photographed with the camera 3 and sent to the other party's video phone, while the other party's face is projected as a monitor image on the image reproduction surface 2a of the cathode layer tube 2. It is used for

[Problem to be solved by the invention]

However, with conventional videophones, the user P cannot direct his or her line of sight F1 toward both the cathode ray tube 2 and the camera 3, and the user P cannot direct the user P's line of sight F1 toward both the cathode ray tube 2 and the camera 3. While the user is in the room, the camera is photographing the user's P's face from diagonally above as indicated by the arrow F2.

Therefore, camera 3 is unable to photograph user P's face from the front, and the elegant image (user's face) projected on the cathode ray tube of the other party's video phone shows that user P turned his face slightly downward. The issue was that the person's face would be downcast, and the other party would not be able to see their face properly.

Furthermore, since the cathode ray tube 2 and the camera 3 are arranged in two stages, upper and lower, on the front surface 1a of the cabinet 1, the vertical height Hl of the cabinet 1 becomes high, resulting in an increase in the size of the cabinet 1. Ta.

The present invention provides a display device with a camera that allows the user to photograph the user's face from the front with a camera while facing the monitor image GL (the other party's face) projected on the display. is intended to provide.

[Means to solve the problem]

In order to achieve the above object, the display device with a camera of the present invention has optical means capable of transmitting and reflecting light disposed on a main optical axis, and a camera and a camera on the transmission side of the main optical axis with respect to the optical means. The other of the camera and the display is placed on the reflection side of the main optical axis with respect to the optical means.

[For production]

A display device with a camera configured as above,
By placing the user's line of sight on the main optical axis.

Since the user's line of sight can be directed to both the camera and the display at the same time, the user can direct his or her face to both the camera and the display at the same time. You can take pictures with a camera.

〔Example〕

The following 1 invention is videophone 4! l! An embodiment applied to the present invention will be described with reference to FIGS. 1 to 3. In addition.

The same structural parts K as those of the conventional example shown in FIG.

First, as shown in FIG.
A transparent glass plate 4 is vertically attached to the top. Inside the cabinet 1, there is a half mirror (also known as a beam glitter) 5 which is an optical means that can transmit and reflect light, a camera 3 which is a television camera, and a flat liquid crystal display (which is a display). LCD)6 is installed.

The main light @F3 is set to pass through the glass plate 4 horizontally or at a predetermined angle, and the half mirror 5 is disposed obliquely #I at a predetermined angle 01 on the main light @F3.

A camera 3 is disposed on the rear surface 5a side of the half mirror 5, which is the transmission side of the main optical axis F3 with respect to the half mirror 5, and the optical axis F4 of the camera 3 is the transmitted light of the main optical axis F3 that passes through the half mirror 5. There are matches on the street.

! In addition, a liquid crystal display 6 is arranged in a substantially horizontal MK with its image reproduction surface 6a facing downward, above the ± direction inclined front surface 5b of the half mirror 5, which is the reflection side of the main optical axis F with respect to the half mirror 5. .

That picture gI! 711 Optical axis F5 of noon plane 6a is a half mirror
5 are scattered on the reflected optical path of the main optical axis F3.

Note that the output angle θ2 of the optical axis F5 with respect to the one-image return plane 6a is set to an angle other than 90 degrees.

According to this video telephone, as shown in FIG. 1, the line of sight F of the user (observer) P is the main optical axis F.

By placing it above, the visual field aF1 is aligned with the main optical axis F3 (one optical axis) 4
The image on the liquid crystal display 6 can be directed to the front of the camera 3 through the transmitted light path of the 8-7 mirror 5, and at the same time, the visual field 1m P1 can be directed to the front of the camera 3 through the reflected light path of the half mirror 5 with the main optical axis F3 and the optical axis F. It can also be directed to the front of the reproduction surface 6a.

Therefore, when the user P
This is because the user P's face can be photographed from the front with the camera 3 while looking at the monitor image (the other party's face) displayed on the screen A from the front.

Both the user P and the other party display monitor images taken of the front of each other's faces on the image reproduction surface 6 of each other's liquid crystal display 6.
aK can be displayed. As a result, both the user P and the other party have a mutual line of sight F.

You can converse while looking at each other's faces correctly, so that you can match each other's faces.

Furthermore, according to this video telephone, the camera 3 and the liquid crystal display 6 can be arranged separately on the transmission side and the reflection side of the main optical axis F3 with respect to the half mirror 5 inside the cabinet 1. 1 front 1a
There is no need to arrange the camera 6 and the liquid crystal display 6 in two stages, upper and lower. Therefore, in particular, there is no need to secure an exclusive area for the camera 51 on the front surface 1a of the cabinet 1, and the vertical height H2 of the cabinet 1 can be made smaller than Hl of the conventional example shown in FIG. cabinet 1
can be made smaller.

In this case, by distributing the flat liquid crystal display 6 almost horizontally within the cabinet 1, the vertical height H2 of the cabinet 1 can be reduced to the size of a candle.

Next, according to this video telephone, as described above, since the liquid crystal display 6 is disposed on the reflected light path of the main optical axis F3 reflected by the half mirror 5, the image quality is improved depending on the viewing angle of the liquid crystal display 6-. Deterioration is improved.

That is, as shown in FIG. 2, the front surface of the 8-7 mirror 5 is directed to a light ray f1 shown by a solid line emitted from a certain point P1 on the image reproduction surface 6a of the liquid crystal display 6 in a direction perpendicular to the image reproduction surface 6a. 5b will be reflected at point P2 and seen from viewpoint E1.

On the other hand, a light ray f z 11. which is emitted from a certain point P1 of the image reproduction 1i16a to the image reproduction surface 6a at a viewing angle of, for example, 25 and is indicated by a -fc1 dotted chain line. It is reflected at a point P3 on the front surface 5b of the half mirror 5, and is seen from a viewpoint E2.

In other words, the monitor image of the image reproduction surface 6a viewed from the viewpoints EI and E2 becomes a virtual image of the point P4 shown by the two-dot chain line, and a sufficiently long optical path p1 is formed between the viewpoints E1 and the point P4, so that the viewpoint E1 It is far enough from viewpoint E2! Even if you move 2, the light is 1! The viewing angle is 25 zr for f t.
It becomes possible to see the tfc light*tz.

On the other hand, without using the half mirror 5, the image reproduction surface 6a of the liquid crystal display B is moved to, for example, point P! When the point P2 is viewed directly from the viewpoint E1, the light path 11 between the point P2 and the viewpoint E1 is
' is the optical path! Therefore, at that point P, the viewing angle with respect to the light Hf s is 25 degrees.The viewpoint E3, which can see the light @f shown by the dotted line, is very close to the viewpoint H1. It becomes 12'.

Therefore, by using half mirror 5.

The length of the optical path from the viewpoint E1 to the image reproduction surface 6a can be expanded from 11 to 11, and the viewpoint can be moved so that the monitor image on the image reproduction surface 6a can be viewed at a position shifted by a viewing angle of, for example, 25 degrees. The possible distance can be expanded from 12 to 1.

In other words, in order to view the monitor image on the one-image reproduction surface 6a, the position of the viewpoint is set at a distance of 1114, which is larger than the distance of 11.
Even if the camera moves by an amount corresponding to z, the viewing angle remains within a range of, for example, 25°, so the quality of the monitor image does not deteriorate, and the deterioration in the quality of the monitor image due to the viewing angle can be improved.

Next, according to Jin's video phone, as mentioned above, the emission angle θ of the optical axis F with respect to the image reproduction surface 6aK of the liquid crystal display 6 is set at an angle other than 90 degrees.
As shown in Figure 3, external light s emitted from the face of user P, etc.
r4 is reflected by the half mirror 5 and the image reproduction surface 6ar
When the external light f4 is incident at an angle c of 02, the external light f4 is reflected at an angle 110x in a direction opposite to the direction of incidence on the image reproduction surface 6a.

Is that radiation t7? :External light IN f a' *Cannot return to the above incident optical path. Therefore, it is possible to prevent the user's P's face and the like from being reflected and visible on the image reproduction surface 6a.

According to this video telephone, as described above, the liquid crystal display 6 is arranged horizontally above the half mirror 5 with its image reproduction surface 6a facing downward. There is no direct exposure to outside light. Moreover, the liquid crystal display 6 can also be used as the upper part of the half mirror 5.

Since the upwardly inclined front surface 5b of the 8-7 mirror 5 can be darkened, even when used in a bright place, the image reproduction surface 6
It is possible to reproduce a monitor ll1i image with good contrast on a.

Also, display the image on the LCD display 6! By arranging the upper position VC,l'1 of the half mirror 5 horizontally with the re-living surface 6a facing downward, the backlight s is arranged above the image reproduction surface 6a in the liquid crystal display 6.
Heat radiation (not shown) can be easily and efficiently radiated from the upper surface 1b of the cabinet 1.

Further, the image reproducing surface 6a of the liquid crystal display 6 is not placed on the front surface 1aK of the cabinet 1, and the user P cannot directly see the image reproducing surface 6a. Therefore, the user P has a clear field of vision.

Also, as shown in FIG. 2, viewpoints g,,E.

Light Wr from to the image reproduction surface 6a of the liquid crystal display 6
-61 is long enough, so for user P, ri, lb
The image reproduction surface 6a is visible toward the back of the cabinet 1. Therefore, the user P can view the monitor image without feeling uncomfortable even if he is close to the front side 1a of the cabinet 1, so the camera 3 can take a close-up picture of the user P's face, and the video call of the other party can be User P's face can be projected in close-up on the display.

The image reproduction surface 6a of the liquid crystal display 6 is reflected by the -7 mirror 51C for viewing.

gI6 of the distance between the half mirror 5 and the image reproduction surface 6a
The image reproduction surface 6 can be adjusted by coloring the half mirror 5 or
You can easily enlarge a, reduce it by 1m, or adjust the color p4.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments. , various useful changes are possible based on one's ideas.

For example, the positions of the camera 3 and the liquid crystal display 6 shown in the above embodiment may be exchanged by Km.

Further, the optical means is not limited to the half mirror 5, but may be a prism or the like, and the number of times the light is reflected by the optical means and the optical path may be any number of times. 6, various image display devices such as a cathode ray tube can be applied.

Further, the present invention can be applied to various display devices equipped with a camera such as a television intercom without adding the television phone KRi.

〔Effect of the invention〕

The main 8A is configured as described above.

This produces the following effects.

Since the user can take a picture of the user's face from the front with the camera while looking directly at the monitor image (the other party's face) displayed on the display, both the user and the other party can Motor images taken of the front of each other's faces can be projected onto each other's display. Therefore, both the user and the other party can make sure that their line of sight matches each other, You can read and write a conversation while looking correctly.

Place the camera and display on the front of the cabinet (upper and lower).
Since it is no longer necessary to arrange the cabinets in stages, the vertical height of the cabinet can be reduced, and the cabinet can be made smaller.

When viewing a display by reflecting it with an optical means, the display can be easily enlarged, reduced in size, or adjusted in color by adjusting the distance between the optical means and the display, or by coloring the optical means.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a sectional view of the entire videophone, FIG. 2 is a diagram explaining the viewing angle of the liquid crystal display, and FIG. The figure is a diagram illustrating the reflection of external light on the liquid crystal display section. FIG. 4 is a sectional view illustrating a conventional example. In addition, in the codes used in one drawing, 3...
... Camera 5 ... Half mirror (optical means) 6.
......Liquid crystal display (display) Fl...User's line of sight F,...Principal optical axis F4...Camera Optical axis 1, Ns...This is the optical axis of the display.

Claims (1)

[Claims] Optical means capable of transmitting light and reflecting light are disposed on a main optical axis, and one of a camera and a display is disposed on the transmission side of the main optical axis with respect to the optical means, A display device with a camera, wherein the other of the camera and the display is disposed on the opposite side of the main optical axis with respect to the optical means.