Display device

Abstract

To provide a display device that can be utilized in various usage modes.SOLUTION: A display device 10A includes: a flexible display body 12 to which an OLED 11 is affixed; a cylinder 14 for reeling up the flexible display body 12 from one end; a constant load spring for imparting winding force of the flexible display body 12 to the cylinder 14; a strip material 54 that is provided at both edges along an unwinding extension direction relative to the flexible display body 12, can be reeled up along with the flexible display body 12 for the cylinder 14, and maintains the flexible display body 12 in a linear shape at the time of unwinding; and a fixing mechanism 24A that opens the flexible display body 12 when a winding direction of the flexible display body 12 is relatively a direction along a winding direction for the cylinder 14, and fixes the flexible display body 12 so as not to be rewound in a direction along an anti-winding direction for the cylinder 14 relatively.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a retractable display device.

Background Art

[0002] Patent Document 1 discloses a retractable display device. In this display device, a display unit is wound and stored inside a stationary housing, and the display unit is moved up and down under the action of a motor using a link mechanism.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although the device of Patent Document 1 is vertical and it seems possible to adjust the amount of lifting and lowering, it is stationary and cannot be set horizontally. It is preferable that a retractable display device can be miniaturized to the extent that it can be supported for mobile use or a simple stand. In addition, a portable display device preferably has a variable display area and can support both vertical and horizontal orientations, enabling use in various usage modes.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a display device that can be used in various usage modes.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, a display device according to an embodiment of the present invention includes an OLED, a winding body that winds up the OLED from one end, a constant load spring that applies a winding force of the OLED to the winding body, a strip member that is provided at both edges along the unwinding and extending direction with respect to the OLED and is wound together with the OLED with respect to the winding body and maintains the OLED in a linear shape when unwinding, and a fixing mechanism that releases the OLED when the unwinding direction of the OLED is in a direction along the winding direction with respect to the winding body and fixes the OLED so that it cannot be wound when in a direction along the reverse winding direction with respect to the winding body.

Advantages of the Invention

[0007] According to the above aspect of the present invention, the unwinding amount of the OLED can be arbitrarily adjusted, and moreover, it is maintained in an arbitrary orientation, enabling utilization in various usage modes.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the display device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by this embodiment.

[0010] FIG. 1 is a schematic diagram showing a display device 10 and its external devices according to an embodiment of the present invention.

[0011] The display device 10 uses an OLED (Organic Light Emitting Display) 11 as a display. The OLED 11 has the characteristics of being thin, lightweight, low power consumption, and excellent in contrast and responsiveness. In addition, since the OLED 11 is flexible, it can be wound, but it has relatively strong bending elasticity and has the property of returning to a flat shape without an external force. The display devices 10A according to the first embodiment and the display device 10B according to the second embodiment as the display device 10 will be described in order. In this embodiment, the size of the OLED 11 is, for example, about 20 inches or 30 inches.

[0012] First, the display device 10A according to the first embodiment will be described. FIG. 2 is a schematic cross-sectional side view of the display device 10A. FIG. 3 is a schematic cross-sectional front view of the display device 10A. FIGS. 2 and 3 show a state in which the flexible display body 12 is pulled out from the cover 18 by a predetermined amount and fixed by the fixing mechanism 24A.

[0013] The display device 10A includes a flexible display body 12, a cylinder (winding body) 14, a cover 18, a constant load spring 20, a fixing mechanism 24A, a pulling bar 26, a control unit 28, and a display control unit 30. The OLED 11 is provided almost entirely on the flexible display body 12, and the flexible display body 12 and the OLED 11 are substantially synonymous with respect to winding and unwinding. The cylinder 14 is cylindrical, and the flexible display body 12 is wound from one end 12a on its surface. In the description of the display device 10A, the extending direction of the cylinder 14 is defined as the X direction. The cylinder 14 is cylindrical, and the X direction corresponds to the axial direction of the cylinder 14. The side of the constant load spring 20 is the X1 direction, and the opposite side is the X2 direction. The unwinding and winding directions of the flexible display body 12 are defined as the Y direction, the cylinder 14 side is the Y1 direction, and the pulling bar 26 side is the Y2 direction. Also, in FIGS. 2 and 7 to be described later, as a relative circumferential direction expression, the direction along which the flexible display body 12 winds around the cylinder 14 is defined as the CW direction, and the opposite is the CCW direction.

[0014] The hollow portion 14a of the cylinder 14 is provided with a control unit 28 and a display control unit 30. The control unit 28 and the display control unit 30 are in an elongated shape and are provided along the X direction. The control unit 28 and the display control unit 30 are connected by a control line.

[0015] The control unit 28 corresponds to the motherboard in a normal personal computer, controls the entire display device 10A, and is connected to an external device via an interface cable 31. The interface cable 31 forms a spiral portion 31a so that the rotation of the cylinder 14 is not transmitted to the outside.

[0016] Examples of the external devices include a keyboard 32, a mouse 34, a communication port 36, and an external battery 38. These external devices are connected as needed and can be disconnected when not needed. The control unit 28 may be outside the display device 10A. The battery may be inside the display device 10A.

[0017] The display control unit 30 controls the display of the OLED 11 and is, for example, a timing controller. The cylinder 14 is formed with a slit 14b (see FIG. 2), and one end 12a of the flexible display body 12 is connected to the display control unit 30 via a plurality of display control lines 30a from the slit 14b. The display control unit 30 is preferably provided along the horizontal direction in the vicinity of one end 12a of the flexible display body 12 from the viewpoint of the horizontal display timing, and a layout along the X direction in the hollow portion 14a is suitable.

[0018] The cover 18 is a cylindrical housing that covers the entire display device 10A, and both ends are closed by lids 18a and 18b. The lids 18a and 18b may be provided with a power switch, a brightness adjustment switch for the OLED 11, etc. In the X1 direction of the cover 18, a bulging portion 18d for housing the constant load spring 20 is formed. The cover 18 has a diameter that is somewhat larger than that of the cylinder 14, and a winding space 16 for the flexible display body 12 is secured between the cover 18 and the cylinder 14. The diameter of the cover 18 is about 30 mm in this embodiment.

[0019] The cover 18 is formed with a slit 18c (see FIG. 2) through which the flexible display body 12 is unwound. The other end 12b of the flexible display body 12 extends out of the slit 18c. A pulling bar 26 is provided over the entire length of the other end 12b. The pulling bar 26 is for gripping when unwinding the flexible display body 12, and is made of, for example, a stainless steel material, and has a diameter that is easy to grip.

[0020] The X2-side end of the cylinder 14 is supported by a bearing 39. The bearing 39 has an outer ring 39a and an inner ring 39b. The inner ring 39b is fixed to the lid 18b. The outer ring 39a has the same diameter as the cylinder support portion 42a described later, and is fixed to the inner wall of the cylinder 14 via a rubber ring 48.

[0021] FIG. 4 is a schematic perspective view of the constant load spring 20. In FIG. 4, a part is shown by a virtual line. The constant load spring 20 will be described with reference to FIGS. 3 and 4. The constant load spring 20 is provided at the end of the cover 18 in the X1 direction. The constant load spring 20 has an elastic band 40, a first pulley 42, and a second pulley 44. The first pulley 42 and the second pulley 44 are supported by the first shaft 46a and the second shaft 46b of the spring support member 46. The spring support member 46 is fixed to the lid 18a. A sensor for detecting the rotation angle may be provided between the first pulley 42 and the first shaft 46a so that the control unit 28 can grasp the unwinding amount of the flexible display body 12.

[0022] The cylinder support portion 42a at the X2 side end of the first pulley 42 is moderately wide in the X direction and is fixed to the inner wall of the cylinder 14 via a rubber ring 48. The first pulley 42 has a larger diameter than the second pulley 44. The first pulley 42 has a larger width in the X direction than the second pulley 44 and forms a bearing structure with the first shaft 46a. This bearing structure is, for example, a two-row type, and the cylinder 14 is stably supported and can rotate smoothly. The first shaft 46a has a hollow structure, and the interface cable 31 passes through the inside. The interface cable 31 is fixed by a grommet 47 in the hollow portion of the first shaft 46a. The first pulley 42 is coaxial with the cover 18, and the second pulley 44 is located at the bulging portion 18d. A part of the constant load spring 20 is arranged at the bulging portion 18d, but most of it is accommodated inside the cylindrical portion of the cover 18 and is sufficiently small and lightweight.

[0023] The elastic band 40 is a metal spring material having a bending elasticity such that it curls in its natural state, like a so-called spiral spring. The elastic band 40 hardly stretches in the pulling direction. The first pulley 42 is provided at the X1 side end of the cylinder 14 and is wound in a direction opposite to the direction in which the elastic band 40 curls in its natural state. The second pulley 44 winds up the elastic band 40 unwound from the first pulley 42 in the natural spiral direction.

[0024] Such a constant load spring 20 always exerts a constant elastic force regardless of the amount of unwinding of the elastic band 40 and applies a rotational force to the first pulley 42. This rotational force applies a force F (see Figure 2) for winding the flexible display body 12 to the cylinder 14. The force F is, for example, about 800 gf, although it also depends on the size of the flexible display body 12 and the like.

[0025] FIG. 5 is a schematic diagram of the flexible display body 12. The flexible display body 12 has, in addition to the OLED 11, a first sheet 50, a second sheet 52, and a pair of strip materials 54. The first sheet 50 is a base material of the flexible display body 12, and a flexible and lightweight sheet that can be easily wound around the cylinder 14 is used. The OLED 11 is attached to almost the entire surface of the front side of the first sheet 50 except for both ends in the X direction. The strip materials 54 are provided over almost the entire length in the Y direction at both ends of the first sheet 50 where the OLED 11 is not present, but the strip materials 54 and the second sheet 52 are slightly separated from each other. The strip materials 54 have an arc-shaped cross section similar to that of a metal tape measure called a convex, can be wound together with the OLED 11 around the cylinder 14, and can maintain the OLED 11 in a straight line when unwound. The strip materials 54 basically do not overlap with the OLED 11, but may overlap with the ends of the OLED 11 when provided on the back surface of the first sheet 50 or outside the active area where display is performed.

[0026] The second sheet 52 is provided at the end of the flexible display body 12 in the Y2 direction so as to extend the first sheet 50. The second sheet 52 is harder than the first sheet 50, and particularly has a high tensile strength in the Y direction. The end of the OLED 11 in the Y2 direction is attached to the second sheet 52. A pull-out bar 26 is provided on the second sheet 52. The dimension of the second sheet 52 in the Y direction is short, and the end of the OLED 11 and the pull-out bar 26 are sufficiently close to each other. Note that the "sheet" in the present application is in a broad sense and includes flexible materials such as cloth materials and mesh materials.

[0027] Thus, since the OLED 11 is almost entirely attached to the soft first sheet 50, it is easy to wind around the cylinder 14. Also, when the OLED 11 and the flexible display body 12 are unwound, both ends are linearly maintained by the strip material 54, so they can be used in any direction. Furthermore, since the end in the Y2 direction of the OLED 11 and the flexible display body 12 is held by the pull bar 26, and the end in the Y1 direction is held by the guide bar 62 and the stop roller 64, which will be described later, at the slit 18c which is the unwind opening, almost all of the four sides are held in a frame shape and are stable. When the pull bar 26 is gripped and pulled, a tension is generated in the flexible display body 12 by the constant load spring 20, but the OLED 11 and the pull bar 26 are connected by the hard second sheet 52 and there is no deterioration such as elongation or cutting. Also, when the OLED 11 is wound up, a winding error occurs between the OLED 11 and the strip material 54, so if the strip material 54 is pasted on the hard second sheet 52 after winding up and a slight shift occurs, this winding error cannot be absorbed and a force like torsional strain is applied to the OLED 11. In contrast, in this embodiment, since the strip material 54 and the second sheet 52 are separated, such inconvenience does not occur.

[0028] As shown in FIGS. 2 and 3, the fixing mechanism 24A is provided on the base 60 formed at one edge of the slit 18c in the cover 18, and includes a guide bar 62, a stop roller 64, a push spring 66, and a pair of support angles 68. The base 60 has a block 60a fixed to the cylindrical portion of the cover 18 and a protruding wall 60b protruding in the Y2 direction from the block 60a.

[0029] The stop roller 64 is provided so as to cross the entire width in the X direction along the winding inner surface 12c of the flexible display body 12 with respect to the cylinder 14. The winding inner surface 12c is the surface to which the OLED 11 is attached. The guide bar 62 is provided so as to cross the entire width in the X direction along the winding outer surface 12d of the flexible display body 12 with respect to the cylinder 14.

[0030] The support angle 68 is in an obtuse L shape and supports both ends of the guide bar 62 and the stop roller 64. One end of the support angle 68 is pivotally supported so as to be tiltable with respect to the tip of the protruding wall 60b, the other end 68b rotatably supports the stop roller 64, and the guide bar 62 is non-rotatably supported at the bent portion 68c. The stop roller 64 and the guide bar 62 are parallel in the vicinity, and the flexible display body 12 passes through the gap 70 therebetween. The gap 70 is appropriately narrow so that the drawer bar 26 does not come out to the Y1 side. One end of the push spring 66 engages with the block 60a, and the other end engages with the intermediate portion between the shaft support portion 68a and the bent portion 68c, and elastically biases the support angle 68 in the Y2 direction. That is, the guide bar 62 and the stop roller 64 are integrally elastically biased in the Y2 direction via the support angle 68. The support angle 68 is displaceable in the Y2 direction until it hits a predetermined stopper (see FIG. 6), but the displacement amount is small. The biasing force of the push spring 66 is small. The surfaces of the guide bar 62 and the stop roller 64 are made of silicone rubber (rubber material), making it difficult for them to slip against the flexible display body 12.

[0031] FIG. 6 is a schematic cross-sectional side view of the display device 10A when the flexible display body 12 is unwound. When unwinding the flexible display body 12 from the slit 18c of the cover 18, the drawer bar 26 is gripped and pulled while being slightly shifted toward the CW side (arrows A1, A2). The flexible display body 12 is subjected to a force in the winding direction by the constant load spring 20, but the user can pull it with a constant force regardless of the amount of pull.

[0032] At this time, the support angle 68 of the fixing mechanism 24A is pushed out by the push spring 66 (arrow A3) and is displaced in the Y1 direction to a position where it hits the stopper. The flexible display body 12 can be pulled out through the gap 70 without contacting either the stop roller 64 or the guide bar 62.

[0033] Also, when lifting and pulling out the OLED 11 upward, when the inner surface 12c abuts against the stop roller 64, since the stop roller 64 is rotatable, it can be pulled out with almost no resistance, and the OLED 11 on the inner surface 12c will not be damaged. Further, when the outer surface 12d of the flexible display body 12 abuts against the guide bar 62, the frictional force is small and there is no problem in pulling it out.

[0034] When the flexible display body 12 is pulled out to an arbitrary length and the hand is released from the pull-out bar 26, it becomes the state of FIG. 2 and the flexible display body 12 is fixed by the fixing mechanism 24A. That is, the flexible display body 12 is instantaneously wound in the Y2 direction by the constant-load spring 20, is displaced slightly in the CCW direction, and since the gap 70 is narrow, the outer surface 12d immediately contacts the guide bar 62. Then, the support angle 68 is displaced in the Y2 direction together with the flexible display body 12 due to the frictional force between the guide bar 62 and the outer surface 12d (arrow A4). Since the biasing force of the push spring 66 is small, it does not prevent the displacement of the support angle 68.

[0035] The flexible display body 12 forms an acute-angle gap 72 tangentially with respect to the laminated winding portion with respect to the cylinder 14 in the slit 18c (the cylinder 14 itself in the state where the entire length of the flexible display body 12 is unwound). The stop roller 64 enters the gap 72 when the support angle 68 tilts in the Y1 direction, and stops and fixes the pulling-in of the flexible display body 12 by the action similar to a wedge (arrow A5). The guide bar 62 is continuously biased in the Y1 direction by the friction with the outer surface 12d, and the position of the support angle 68 is maintained. Practically, it is instantaneous from when the hand is released from the pull-out bar 26 until it is fixed by the stop roller 64, and the winding amount of the flexible display body 12 is extremely small, enabling fixation at an arbitrary position without giving the user a sense of discomfort. In the fixing mechanism 24A, at least the flexible display body 12 is fixed so as not to be wound against the constant-load spring 20, and the state of FIG. 2 is maintained also with respect to the winding-out direction, and there is an appropriate fixing force.

[0036] Since the surface of the stop roller 64 is made of silicone rubber, the flexible display body 12 will not be wound up while slipping. Since the OLED 11 has relatively strong bending elasticity, it is surely supported by the stop roller 64 and the flexible display body 12 is fixed. The stop roller 64 acts uniformly over the entire length of the OLED 11 in the X direction. The stop roller 64 can not only contact the OLED 11 but also contact the strip 54 that is maintained linearly, thereby fixing the flexible display body 12 more securely.

[0037] FIG. 7 is a schematic cross-sectional side view of the display device 10 when releasing the fixation of the flexible display body 12. FIG. 8 is a schematic cross-sectional side view of the display device 10 when winding up and storing the flexible display body 12.

[0038] When releasing the fixation of the flexible display body 12, as shown in FIG. 7, grip the draw bar 26 and move it slightly in the CW direction. Then, the stop roller 64 rotates, and the support angle 68 is balanced in a state of being slightly pushed in the Y1 direction by the weak push spring 66 without moving in either the Y1 direction or the Y2 direction. Specifically, the spring force of the push spring 66 should be smaller than the frictional force between the silicon rubber surface of the stop bar 62 in FIG. 2 and the OLED 11, and should be strong enough to return the support angle 68 in the Y1 direction when it is free.

[0039] The guide bar 62 is separated from the flexible display body 12 and is elastically biased in the Y1 direction by the push spring 66 and displaced (arrow A6). The stop roller 64 passes through the gap 72 (arrow A7), and the fixation of the flexible display body 12 is released. After that, to further pull out the flexible display body 12, do as shown in FIG. 6. When winding up and storing the flexible display body 12, if the force of pulling the draw bar 26 is relaxed while keeping the CW direction (arrow A8), the stop roller 64 contacts the inner surface 12c and rotates by the winding force of the constant load spring 20 (arrow A9), and the flexible display body 12 is wound up (arrow A10).

[0040] FIG. 9 is a schematic view of the fixing mechanism 24AA according to the first modification. FIG. 10 is a schematic view of the fixing mechanism 24AB according to the second modification. In the fixing mechanism 24AA, the protruding wall 60b extends to the Y1 side from the shaft support portion 68a and has a block 60a at the tip. A pull spring 66A is provided between the block 60a and the support angle 68, and the support angle 68 is elastically biased in the Y1 direction. In the fixing mechanism 24AB, a torsion spring 66B is provided around the shaft support portion 68a, and elastically biases the support angle 68 in the Y1 direction. In each embodiment, the support angle 68 has an obtuse L shape, the guide bar 62 and the stop roller 64 are arranged at appropriate positions, and the portion connecting the bent portion 68c and the shaft support portion 68a is substantially orthogonal to the Y direction, and can tilt in a well-balanced manner on the Y1 side and the Y2 side. However, the support angle 68 may be a right-angled L shape or a straight shape according to the layout requirements.

[0041] FIG. 11 is a diagram showing a usage example of the display device 10A, where (a) is a diagram showing the stored state, (b) is a diagram showing the state ready for use, (c) is a diagram showing the usage state, and (d) is a diagram showing the tidied-up state.

[0042] Since the display device 10A is small and lightweight, as shown in FIG. 11, it can be attached to the lighting desk stand S and moved to an arbitrary position for use. As shown in FIG. 11(a), in the storage state, keeping it vertical can suppress the occupied space. Also, during use, the display device 10A can be set at an arbitrary position and height.

[0043] The orientation of the display device 10A during use is not limited. As shown in FIG. 11(b), the flexible display body 12 may be pulled downwards, or as shown in FIG. 11(c), the flexible display body 12 may be pulled upwards, or as shown in FIG. 11(d), the flexible display body 12 may be pulled out sideways. As described above, the amount of pull-out of the flexible display body 12 can be set arbitrarily. The display device 10A may be stored horizontally.

[0044] According to the above display device 10A, when the unwinding directions of the OLED 11 and the flexible display body 12 are relatively in the CW direction with respect to the slit 18c (see FIG. 6), it is opened, and when it is relatively in the CCW direction, it is fixed at least so as not to be rewound. Further, the unwound flexible display body 12 is held in a frame shape by the draw bar 26, the guide bar 62, the stop roller 64, and the two strip materials 54 and is stabilized in an arbitrary orientation, so that it can correspond to both vertical and horizontal orientations.

[0045] The display device 10A has the OLED 11 and the constant load spring 20 housed inside the cylindrical cover 18, is small, lightweight, inexpensive, and has excellent portability. The display device 10A does not require a link mechanism as shown in Patent Document 1, and since it does not require power to drive the link mechanism, it does not require a motor. The display device 10A is rewoundable, small, and lightweight, and can support mobile applications and simple stands.

[0046] The OLED 12 has a property of trying to return to a planar shape, but since it is always biased by the constant load spring 20, it is maintained in an appropriate wound state with respect to the cylinder 14, and does not spread in the outer diameter direction inside the space 16 and contact the inner wall of the cover 18. Therefore, it does not slide and get damaged between the cover 18, nor does it receive unnecessary frictional force. Since the display area of the display device 10A can be changed, the aspect ratio can be 1:3, 3:4, 4:3, 16:9, 21:9, etc. In this way, the display device 10A can be used in various usage modes. As a result, it can be used in different sizes depending on applications such as in a train, a main display on a desk, and a large sub-display.

[0047] Next, the display device 10B according to the second embodiment will be described. The same reference numerals are given to the same components as those of the above display device 10A, and detailed description thereof will be omitted.

[0048] FIG. 12 is a schematic cross-sectional side view of the display device 10B in a state where the flexible display body 12 is released. FIG. 13 is a schematic cross-sectional front view of the display device 10B in a state where the flexible display body 12 is pulled out from the cover 18 by a predetermined amount and fixed by the fixing mechanism 24B.

[0049] In the display device 10B, the flexible display body 12 is fixed by the fixing mechanism 24B instead of the above-described fixing mechanism 24A. In the display device 10B, at the slit 18c, the unwinding side (CCW side) of the flexible display body 12 with respect to the cylinder 14 is the end 18ca, and the winding side (CW side) is the end 18cb. Among these, the end 18ca acts as the fixing mechanism 24B. The ends 18ca and 18cb have, for example, a circular cross-section and are slightly thick.

[0050] As shown in FIG. 12, when the cover 18 is rotated relative to the cylinder 14 in the CCW direction (arrow A12) while holding the pull bar 26, the unwinding direction of the flexible display body 12 relatively approaches the CW direction with respect to the slit 18c. Then, the flexible display body 12 can be unwound and wound away from the end 18ca on the CCW side at the slit 18c (arrow A13).

[0051] As shown in FIG. 13, when the draw bar 26 is released, the flexible display body 12 is displaced toward the CCW side at the slit 18c by the force with which the OLED 11 and the strip 54 attempt to return to a planar state. That is, with respect to the flexible display body 12, the cover 18 rotates relatively in the CW direction (arrow A14). Then, the flexible display body 12 is pressed by the end portion 18ca at the slit 18c (arrow A15). The flexible display body 12 is fixed because it is pressed against the laminated winding portion with respect to the cylinder 14 at the slit 18c (the cylinder 14 itself in the state where the entire length of the flexible display body 12 is unwound). Such a display device 10B has a simple structure and can be reduced in size and weight, and can be used, for example, as a tablet terminal. Similar to the display device 10A, the flexible display body 12 of the display device 10B can be drawn out by an arbitrary length and used as it is in an arbitrary orientation.

[0052] As shown in FIG. 14(a), the small and lightweight display device 10B can be used while being held with one hand, and the orientation of the flexible display body 12 is maintained even when the hand is released. As shown in FIG. 14(b), the small and lightweight display device 10B can be used by connecting a small flexible tripod T to the end of the cover 18 and attaching it to the pillar P. Depending on the center of gravity position, it can also be used on a tabletop using the flexible tripod T. Although the usage forms of the display device 10A and the display device 10B have been described separately in FIGS. 11 and 14, it is possible to use the display device 10A in the usage form shown in FIG. 14 and the display device 10B in the usage form shown in FIG. 11. Since the display devices 10A and 10B are small and lightweight, they can also be used as a wall-mounted type or a magnet-attached type.

[0053] The present invention is not limited to the above-described embodiments, and it goes without saying that it can be freely changed without departing from the gist of the present invention.

Explanation of Reference Numerals

[0054] 10, 10A, 10B Display device 11 OLED 12 Flexible display body 14 Cylinder 14b Slit 16 Take-up space 18 Cover 18c Slit 20 Constant load spring 24A, 24AA, 24AB, 24B Fixing mechanism 26 Pull-out bar 50 First sheet 52 Second sheet 54 Strip material 62 Guide bar 64 Stop roller 66 Push spring 68 Support angle 70 Gap 72 Gap

Claims

1. an OLED, a winding body that winds up the OLED from one end, a constant load spring that applies a winding force of the OLED to the winding body, a strip provided at both edges along the unwinding extension direction of the OLED, which can be wound together with the OLED with respect to the winding body and maintains the OLED in a straight line when unwound, a fixing mechanism that releases the OLED when the unwinding direction of the OLED is in a direction along the winding direction relative to the winding body, and fixes the OLED so that it cannot be wound when in a direction along the reverse winding direction relative to the winding body, A display device, characterized by comprising the above.

2. In the display device according to Claim 1, the fixing mechanism includes a guide bar provided so as to cross the entire width along the winding outer surface of the OLED with respect to the winding body, a stop roller provided so as to cross the entire width along the winding inner surface of the OLED with respect to the winding body, and the stop roller and the guide bar are parallel in the vicinity and are integrally elastically biased in the unwinding direction of the OLED. A display device, characterized by the above.

3. In the display device according to Claim 2, the surface of the stop roller is made of a rubber material. A display device, characterized by the above.

4. In the display device according to Claim 1, a cover that secures a winding space for the OLED between it and the winding body and from which the OLED is unwound through a slit, and an end portion on the reverse winding side of the OLED with respect to the winding body in the slit constitutes the fixing mechanism. A display device, characterized by the above.

5. In the display device according to any one of Claims 1 to 4, the OLED is attached to a first sheet, a second sheet harder than the first sheet and extending the first sheet is provided at the unwinding side end of the OLED, and a pulling bar for gripping to unwind the OLED is provided on the second sheet. A display device, characterized by the above.

Images