Display device

Abstract

To solve the problem that a holding tool and a fixing tool need to be fixed at a predetermined angle so as to fix a television in an easy-to-see position for a viewer in a television device and re-installation is difficult each time for example when one tosses about in bed although a system for mounting a television to the holding tool to the end of an arm and fixing a base section of an arm to the fixing tool is disclosed as the television device that is easy to see when one lies on one's back.SOLUTION: Constituted is a display device in which the center of gravity of a structure having a projector, a screen, and a spherical surface is near the center of the spherical surface, and a screen can be placed in a position that a viewer desires by moving the screen with extremely light force even in a state in which one lies on one's back or lines on one's side to the left or right by holding a structure by bringing at least three ball rollers and a friction elastic body into contact with the spherical surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technical field related to a display device that is easy to see when lying on one's back or side. [Background technology]

[0002] One proposed television device that is easy to watch when lying on one's back is one in which the television is attached to a holder at the end of an arm, and the base of the arm is attached to a fixture (see Patent Document 1). [Patent Document 1] Utility Model Registration No. 3209224 Public Relations DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0003] However, with conventional techniques, in order to fix the television in a position that is easy for the viewer to view, it is necessary to fix the holder and fixture at a predetermined angle, and it is quite difficult to reset them every time, for example, the viewer turns over in bed.

[0004] The present invention has been made in consideration of the problems of the prior art described above, and realizes a large-screen, lightweight display device that can be rotated by the viewer with a slight force while maintaining a constant distance from the viewer's head and always facing the display surface toward the viewer, whether lying on their back or on their left or right side. [Means for solving the problem]

[0005] In order to solve the problems of the prior art and achieve the above-mentioned object, the display device of the present invention as set forth in claim 1 is characterized in that the center of gravity of a structure having a projector, a screen, and a spherical surface is located near the center of the sphere, and the structure is held in place by contacting three or more ball rollers and a frictional elastic body with the spherical surface. [Effects of the Invention]

[0006] According to the invention described in the first claim, the center of gravity of the structure having the projector, screen, and spherical surface is located near the center of the sphere, and the structure is held in place by contacting three or more ball rollers and a frictional elastic body with the spherical surface, which has the effect of making it possible to rotate the structure with a light force. BEST MODE FOR CARRYING OUT THE INVENTION

[0007] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0008] This embodiment corresponds to the invention as set forth in claim 1, and FIGS. 1, 2, 3 and 4 are diagrams for explaining the display device in this embodiment.

[0009] FIG. 1 is an explanatory diagram of a display device according to this embodiment, showing a state in which a viewer 100 lies on his back and watches an image formed on a screen 350 by light projected from a projector 310. In FIG.

[0010] The display device of this embodiment is composed of a base cover 200 and a structure 300 placed on the base cover, and the structure is composed of a screen, a screen holding mechanism 351, an arm 340, a mirror box 335, a chassis 313, a hemispherical shell 320, a projector 310, etc., and the screen is held by the arm by the screen holding mechanism.

[0011] FIG. 2 is an enlarged view of the lower part of the structure in this embodiment, in which the arm 340 is held by a mirror box 335 , and the mirror box, projector 310 , balancer 312 and hemispherical shell 320 are held by a chassis 313 .

[0012] Here, the light projected from the projector lens 311 is reflected by a mirror 330 attached to the mirror box and reaches the screen.

[0013] The mirror was adopted based on the positional relationship between the optical system of the projector used and the screen, but it can be omitted if the projector uses a dedicated optical system. In that case, the arm is held by the chassis and the light projected from the projector lens is projected directly onto the screen.

[0014] FIG. 3 is an explanatory diagram of the mechanism inside the base cover in this embodiment, but for the sake of explanation, the structure including the hemispherical shell is not shown.

[0015] The base cover 200 has an opening 201 at the top, and a first ball roller 211, a second ball roller 212, a third ball roller 213, a fourth ball roller 214, and a friction elastic body 215 below the opening.

[0016] FIG. 4 is a cross-sectional view 1 of the inside of the base cover in this embodiment.

[0017] For simplicity of explanation, only the hemispherical shell 320 of the lower part of the structure shown in FIG. 2 is shown, and the hemispherical shell is in contact with the third ball roller 213, the first ball roller 211, and the friction elastic body 215, and the second ball roller 212 and the fourth ball roller (not shown) are also in contact with the hemispherical shell.

[0018] FIG. 5 is a cross-sectional view 2 of the inside of the base cover in this embodiment.

[0019] Here, the friction body 216, elastic body 217, and friction elastic body holder 218 that constitute the friction elastic body 215 are shown when the structure including the hemispherical shell is not placed on top of the base cover.

[0020] When the structure including the hemispherical shell is not placed on top of the base cover as shown in Figure 5, the elastic body expands and pushes the friction body upward. However, when the structure including the hemispherical shell is placed on top of the base cover as shown in Figure 4, the weight of the structure including the hemispherical shell pushes down on the friction body, causing the elastic body to contract, and friction can be generated between the friction body and the hemispherical shell.

[0021] Without the frictional elastic body, the hemispherical shell is supported by the four ball rollers, but if the center of gravity of the structure including the hemispherical shell is shifted from the center of the hemispherical shell, the center of gravity will automatically move to be directly above the center of the contact points between the hemispherical shell and the four ball rollers, and the screen will not be able to be positioned as intended by the viewer.

[0022] In contrast to this, in this embodiment, by placing the frictional elastic bodies in the positions shown in Figures 3, 4, and 5, an appropriate amount of friction is applied to the hemispherical shell. Even if the center of gravity of the structure including the hemispherical shell is slightly deviated from the center of the hemispherical shell, this friction prevents the center of gravity from automatically moving to be directly above the center of the contact points between the hemispherical shell and the four ball rollers, and the screen can be brought to the position intended by the viewer.

[0023] In this embodiment, the elastic body constituting the friction elastic body is a sponge made of urethane foam, and the friction body and friction elastic body holder are made of the same cup-shaped plastic, but this does not limit the scope of the present invention, and many variations are possible for the elastic body, friction body, and friction elastic body holder, all of which are considered to be included in the present invention.

[0024] In this embodiment, the friction elastic body is also composed of an elastic body, a friction body, and a friction elastic body retainer, but this is also one example of the present invention, and any friction elastic body that comes into contact with the spherical shell is considered to be included in the present invention.

[0025] In this embodiment, four ball rollers are used, but a device using three ball rollers can also be used to form a structure, and is therefore considered to be included in the present invention.

[0026] In this embodiment, the outer surface of a hemispherical shell is used as the spherical surface described in claim 1, but this is not limited to a hemispherical shell, and the invention of claim 1 also includes the use of a spherical shell with a solid angle other than 2π steradians (hemisphere) depending on the required rotation range of the structure.

[0027] In addition, a display device that does not use the mirrors or mirror boxes described in the examples, but fixes the positional relationship between the projector and screen by some means and has a structure that is integrated with the spherical shell, is also considered to be included in the invention of claim 1.

[0028] Furthermore, the invention of claim 1 also includes a projector or a display device having a spherical shell structure in which the center of gravity of the structure is near the center of the shell, without using the balancer described in this embodiment.

[0029] Effects of this embodiment The effect of this embodiment is that a viewer using the display device can move the screen with a very light force and place it in a position desired by the viewer, whether lying on their back or on their left or right side. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is an explanatory diagram of a display device according to an embodiment of the present invention; [Figure 2] An enlarged view of the lower part of the structure in this embodiment. [Figure 3] An explanatory diagram of the mechanism inside the base cover in this embodiment. [Figure 4] FIG. 1 is a cross-sectional view of the inside of the base cover in this embodiment. [Figure 5] Cross-sectional view 2 of the inside of the base cover in this embodiment [Explanation of symbols]

[0031] 100... Viewers 200···Pedestal cover 201 Opening on base cover 211 First ball roller 212 Second ball roller 213 Third ball roller 214...Fourth ball roller 215... Frictional elastic body 216...Friction body 217 Elastic Body 218... Friction elastic retainer 300...Structure 310···Projector 311···Projector lens 312 Balancer 313···Chassis 320 Hemispherical shell 330···Mirror 335···Mirror box 340···Arm 350···screen 351 Screen holding mechanism

Claims

[Claim 1] A display device in which the center of gravity of a structure having a projector, a screen, and a spherical surface is located near the center of the sphere, and the structure is held by contacting three or more ball rollers and frictional elastic bodies with the spherical surface.

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