Indication device

Abstract

The objective is to provide a display device that can prevent distortion caused by misalignment between a flexible display body and a strip material that maintains the flexible display body in a straight line. [Solution] The display device 10 includes a flexible display body 22 that is wound up and unwound relative to a first axis 12, a strip material 52 that is arranged on the non-display side of the flexible display body 22 and is wound up and unwound together with the flexible display body 22 relative to the first axis 12, and maintains the flexible display body 22 in a straight line when unwound, a first frame 60 provided at the unwound end of the flexible display body 22, a second frame 62 provided at the unwound end of the strip material 52 and movable relative to the first frame 60 in the winding and unwinding direction, and a coil spring 74 that biases the first frame 60 and the second frame 62 in a direction that separates them.

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 flexible display body can be wound around and unwound from a shaft. A pair of strip materials are provided at both ends of the non-display surface of the flexible display body, and it is configured to be maintained in a straight line when unwound. The strip materials are made of an elastic material, and when wound around the shaft, they form a planar shape, and when unfolded, they form an arc shape.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the display device of Patent Document 1, since strip materials are provided on the back surface of the flexible display body, it has a thickness, and when wound around the shaft, a deviation occurs at the end due to the winding diameter difference. The deviation between the flexible display body and the strip materials can also cause distortion.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a display device capable of preventing distortion caused by deviation between a flexible display body and a strip material for maintaining the flexible display body in a straight line.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, a display device according to an aspect of the present invention includes: a flexible display body that is wound up and unwound on an axis; a strip material disposed on the non-display side of the flexible display body, which is wound up and unwound together with the flexible display body on the axis, and which maintains the flexible display body in a straight line when unwound; a first frame provided at the unwound end of the flexible display body; a second frame provided at the unwound end of the strip material, which is movable relative to the first frame in the winding and unwinding direction; and an elastic body that biases the first frame and the second frame in a direction that separates them. [Effects of the Invention]

[0007] According to the above embodiment of the present invention, it is possible to prevent the flexible display body and the strip material that maintains the flexible display body in a straight line from being distorted in a direction that causes them to peel off. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic perspective view of a display device according to an embodiment of the present invention, in which a flexible display element including an OLED is extended by a predetermined amount. [Figure 2] Figure 2 is a schematic perspective view of the display device with the flexible display unit housed inside. [Figure 3] Figure 3 is a schematic perspective view of a constant-load spring. [Figure 4] Figure 4 is a schematic cross-sectional view of the flexible display unit and the strip material. [Figure 5] Figure 5 shows the back sheet. [Figure 6] Figure 6 is an enlarged perspective view of one end of the control bar, seen from a diagonal rearward angle. [Figure 7] Figure 7 is a perspective view of the circumference difference absorption mechanism provided on the operating bar. [Figure 8]Figure 8 is a schematic cross-sectional view of the circumference difference absorption mechanism, where (a) shows the flexible display body when it is fully unwound and (b) shows it when it is fully retracted. [Figure 9] Figure 9 is a schematic cross-sectional view of the circumference difference absorption mechanism in a modified example, where (a) is a diagram of the circumference difference absorption mechanism in the first modified example and (b) is a diagram of the circumference difference absorption mechanism in the second modified example. [Modes for carrying out the invention]

[0009] Embodiments of the display device according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to these embodiments.

[0010] Figure 1 is a schematic perspective view of a display device 10 according to an embodiment of the present invention, in which the flexible display body 22, including the OLED 46, is extended by a predetermined amount. Figure 2 is a schematic perspective view of the display device 10 in which the flexible display body 22 is retracted.

[0011] The display device 10 includes a first shaft 12 and a second shaft 14 arranged in parallel, a sheet body 16 wrapped around the first shaft 12 and the second shaft 14, a first constant-load spring 18A, a second constant-load spring 18B, and a flexible display body 22. The flexible display body 22 can be wound up and unwound relative to the first shaft 12. The first shaft 12 and the second shaft 14 have a circular cross-section, but do not necessarily have to be circular. Although not shown in the figures, the display device 10 is equipped with a cover that covers the first shaft 12, the second shaft 14, the first constant-load spring 18A, and the second constant-load spring 18B. The flexible display body 22 is wound up and unwound through a slit formed on the upper surface of the cover.

[0012] In each figure, the axial directions of the first axis 12 and the second axis 14 are shown as the X direction, and the direction in which the flexible display body 22 extends from the first axis 12 is shown as the Y direction. The Y direction is slightly inclined with respect to the vertical direction, and in this embodiment, the angle θ between the Y direction and the vertical direction is about 15°. The X direction and the Y direction are orthogonal. The side of the flexible display body 22 with the display surface is considered the front, and the side with the non-display surface is considered the back. When the display device 10 is placed on a desk, the display surface of the flexible display body 22 is positioned to face the user's face almost directly. However, the display device 10 does not necessarily need to be placed on a desk; for example, it can be used as a handheld device like a tablet terminal.

[0013] The X-width of the first axis 12 and the second axis 14 is moderately longer than that of the flexible display body 22, and they are pivotally supported by the left and right side plates 24a and 24b. The side plates 24a and 24b are erected from both ends of the plate 26. The second axis 14 is positioned moderately above and slightly behind the first axis 12, and the common tangent direction connecting the rear surface of the first axis 12 and the front surface of the second axis 14 coincides with the Y-direction.

[0014] A control unit 28 is provided in the hollow section of the first axis 12. The display device 10 can be connected to external devices 30 by wire or wireless connection. Examples of external devices 30 include a keyboard 30a, mouse 30b, I / O port 30c, battery 30d, and personal computer 30e. The personal computer 30e becomes a dual-monitor setup when the display device 10 is connected. The display device 10 is powered by a primary battery, a secondary battery, or commercial AC power. A sensor may be provided to detect the amount of rotation of the first axis 12, and the control unit 28 may read this data.

[0015] The sheet body 16 is made of a fabric such as nylon, is flexible, has an appropriate tensile strength, and has little elongation. The sheet body 16 is wound around the flexible display body 22 in a laminated state with respect to the first axis 12, extending from the rear surface of the first axis 12 to the front surface of the second axis 14, and is wound around the second axis 14 separately from the flexible display body 22. Therefore, when the second axis 14 rotates clockwise in FIGS. 1 and 2, the sheet body 16 is wound around the second axis 14, and the first axis 12 rotates counterclockwise to unwind the sheet body 16. Conversely, when the first axis 12 rotates clockwise, the sheet body 16 is wound around the first axis 12, and the second axis 14 rotates counterclockwise to unwind the sheet body 16.

[0016] A first constant load spring 18A that biases the first axis 12 in the direction in which the first axis 12 winds up the sheet body 16, that is, the clockwise direction in FIGS. 1 and 2, is provided on the first axis 12. A second constant load spring 18B that biases the second axis 14 in the direction in which the second axis 14 winds up the sheet body 16, that is, the clockwise direction in FIGS. 1 and 2, is provided on the second axis 14. The first constant load spring 18A and the second constant load spring 18B are also typically referred to as the constant load spring 18. Since the first axis 12 and the second axis 14 are each biased by the constant load spring 18 in the direction of winding up the sheet body 16, an appropriate tension is generated in the sheet body 16 and it does not bend. Also, the sheet body 16 acts such that when one of the first axis 12 and the second axis 14 winds up, the other unwinds, and when one unwinds, the other also unwinds.

[0017] The first constant load spring 18A is between the flexible display body 22 and the side plate 24b, and the second constant load spring 18B is between the flexible display body 22 and the side plate 24a.

[0018] Figure 3 is a schematic perspective view of the constant load spring 18. In Figure 3, a part is shown by a phantom line. The constant load spring 18 will be described with reference to Figures 1, 2, and 3. The constant load spring 18 has an elastic band 34, a first pulley 36, and a second pulley 38. The first pulley 36 of the first constant load spring 18A is provided on the first shaft 12, and the first pulley 36 of the second constant load spring 18B is provided on the second shaft 14. The second pulley 38 of the first constant load spring 18A is pivotally supported so as to be relatively rotatable with respect to the second shaft 14. The second pulley 38 of the second constant load spring 18B is pivotally supported so as to be relatively rotatable with respect to the first shaft 12.

[0019] The elastic band 34 is a metallic spring material having bending elasticity such that it coils in a natural state, and is something like a so-called spiral spring. The elastic band 34 hardly stretches in the tensile direction. The first pulley 36 is wound in a direction opposite to the direction in which the elastic band 34 coils in a natural state. The second pulley 38 winds up the elastic band 34 unwound from the first pulley 36 in the natural coiling direction. Such a constant load spring 18 always exhibits a constant elastic force regardless of the amount of unwinding of the elastic band 34 and applies a rotational force to the first pulley 36.

[0020] Figure 4 is a schematic cross-sectional view of the flexible display body 22 and the strip material 52. Figure 5 is a view showing the backsheet 50. The inside of the circle in Figure 5 is an enlarged view of a part of the backsheet 50. The flexible display body 22 is a laminate in which a polyimide sheet 40, a polarizing sheet 42, a touch sensor 44, an OLED (Organic Light Emitting Display) 46, a PET (Polyethylene Terephthalate) sheet 48, and a backsheet 50 are fixed by an adhesive tape or the like. Among these, the touch sensor 44 and the like may be omitted depending on the design conditions. The OLED 46 has characteristics such as being thin, lightweight, having low power consumption, and being excellent in contrast and responsiveness. Further, since the OLED 46 is flexible, it can be wound up, but it has relatively strong bending elasticity and has a property of returning to a planar shape without an external force. In this embodiment, the size of the OLED 46 is, for example, about 30 inches. The front side of the OLED 46 is the display surface and the back side is the non-display surface in Figure 1.

[0021] The backsheet 50 is attached to the rear side of the flexible display unit 22, that is, the non-display side of the OLED 46. The backsheet 50 is made of a moderately hard and thin material, for example, stainless steel with a thickness of 150 μm. The backsheet 50 has numerous elongated holes 50a that are long in the X direction formed almost over its entire surface. The elongated holes 50a are aligned in the X direction and form multiple rows in the Y direction. The elongated holes 50a are arranged alternately in the X direction between adjacent rows. Such a backsheet 50 has the property of stretching in the Y direction, making it easy to wind around the first axis 12, and is strong in the X direction.

[0022] When the flexible display unit 22 is stored for a long period of time while wound up on the first axis 12, it has been observed that it tends to develop a convex, arc-shaped curl afterward. This phenomenon is thought to occur because when the OLED 46 is returned to its flat state, the outermost film is pulled vertically, causing it to contract slightly horizontally. The backsheet 50 prevents this curling and keeps the flexible display unit 22 in a nearly flat state.

[0023] Strips 52 are positioned at both ends and in the center of the flexible display body 22, extending almost the entire length in the Y direction. The three strips 52 are positioned on the non-display side of the flexible display body 22. The strips 52 have an arc-shaped cross-section similar to a metal measuring tape called a convex, and can be wound onto the first axis 12 together with the flexible display body 22, while maintaining the flexible display body 22 in a straight line when unwinding. In Figure 1, the strips 52 are in a backward-convex arc shape. When the strips 52 are wound onto the first axis 12, they become planar, and when unfolded, they become arc-shaped.

[0024] Similar electronic devices have a demand for narrow bezels, such as those surrounding OLED displays (OLED46). In the display device 10, the strip material 52 is not visible to the user, so that the left and right vertical bezels do not appear thick. Three strip materials 52 are provided at equal intervals to reliably support the flexible display unit 22. The number of strip materials 52 may be increased or decreased depending on the size of the flexible display unit 22.

[0025] An operating bar 58 is fixed to the upper ends of the flexible display body 22 and the strip material 52. The operating bar 58 is shaped and thick enough to be easily grasped by hand. The flexible display body 22 (see Figure 1), unwound from the first shaft 12, is surrounded on all four sides by the left and right strip materials 52, the upper operating bar 58, and the lower first shaft, maintaining it in a flat state. The operating bar 58 contacts the upper surface of the cover when the flexible display body 22 is being wound up, acting as a stopper to prevent it from being wound up too much relative to the first shaft 12. The detailed configuration of the operating bar 58 will be described later. As a stopper when the flexible display body 22 is being unwound, for example, an arm that moves in conjunction with the first shaft 12 at a reduced speed can contact the upper surface of the plate 26 to limit its movement. Such a stopper mechanism can also be applied when winding up.

[0026] Figure 4 is a schematic cross-sectional view of the flexible display body 22 and the strip material 52. In Figure 4, the flexible display body 22 is shown to be thicker than the strip material 52, but in reality, the strip material 52 is thicker than the flexible display body 22. As shown in Figure 4, the flexible display body 22 is a laminate consisting of a polyimide sheet 40, a polarizing sheet 42, a touch sensor 44, an OLED 46, a PET sheet 48, and a back sheet 50. When wound around the first axis 12, a displacement of length L1 occurs at the end due to the path difference between the inner and outer circumferences. If this displacement is excessive, delamination may occur. The length L1 is determined by the number of times the flexible display body 22 is wound around the first axis 12. The length L1 can be reduced by making the first axis 12 larger in diameter and reducing the number of windings, but this increases the overall size. In order to make the length L1 sufficiently small for practical use without causing delamination, it is appropriate to limit the number of windings of the flexible display body 22 to three or less. Furthermore, if the first shaft 12 has a small diameter, the first constant-load spring 18A for winding must be made larger. Due to these conditions, in this embodiment, while the winding length of the flexible display body 22 is approximately 340 mm, the diameter of the first shaft 12 is set to 40 mm (radius r1 = 20 mm in Figure 8), and the number of windings is set to 2.7 times.

[0027] Incidentally, as mentioned above, the OLED 46 of the flexible display unit 22 has the property of returning to a flat state if there is no external force. The strip material 52 has the same property. For this reason, it is difficult to wrap the flexible display unit 22 and the strip material 52 around the first axis 12 as they are. It is conceivable to provide a cylinder around the first axis 12 to prevent the flexible display unit 22 and the strip material 52 from spreading out, but a large amount of friction will be generated between the flexible display unit 22, which tries to spread out, and the cylinder, requiring a large force to unwind and wind up.

[0028] In the display device 10 according to this embodiment, a sheet body 16 wrapped around a first axis 12 and a second axis 14 is subjected to appropriate tension by a first constant-load spring 18A and a second constant-load spring 18B. The flexible display body 22, including the OLED 46, is wound onto the first axis 12 in a stacked state with the sheet body 16, and as the sheet body 16 is unwound from the first axis 12 to the second axis 14, the flexible display body 22 is unwound from between the first axis 12 and the second axis 14. Therefore, the force that would cause the OLED 46 to return to a planar state is corrected by the sheet body 16, so it does not spread out and can be wound onto the first axis 12 together with the sheet body 16 with almost no gaps.

[0029] The second axis 14 supports the rear surface of the flexible display body 22. In order to stably support the flexible display body 22, it is desirable that the distance between the first axis 12 and the second axis 14 be a certain distance, for example, about 1 to 2 times the diameter of the first axis 12. Since there is a sheet body 16 between the second axis 14 and the flexible display body 22 that displaces synchronously with the flexible display body 22, the flexible display body 22 does not slide against the second axis 14.

[0030] The flexible display unit 22 is unwound from the first shaft 12 by gripping the operating bar 58 and lifting it upwards (see Figure 2), and is a free-stop type that stops at any position, and is also a self-standing type that is maintained in an upright position by the strip material 52. The unwinding of the flexible display unit 22 is a free-stop type that stops at any position based on the torque generated by the first constant-load spring 18A and the second constant-load spring 18B. More specifically, since the force due to the bending rigidity of the OLED 46 and the frictional force act on the flexible display unit 22 and the sheet body 16, the first constant-load spring 18A and the second constant-load spring 18B are set to take these into consideration.

[0031] Let's explain the control bar 58 further. Figure 6 is an enlarged perspective view of one end of the operating bar 58, viewed from the rear at an oblique angle. The operating bar 58 consists of a first frame 60 and a second frame 62. When operating the operating bar 58 to unwind and rewind the flexible display body 22, it is sufficient to operate either or both of the first frame 60 and the second frame 62. The first frame 60 is provided at the unwinding end of the flexible display body 22. The second frame 62 is provided to connect the unwinding ends of the three strip materials 52. The first frame 60 and the second frame 62 are made of, for example, metal, and are provided across the entire width of the flexible display body 22 in the X direction.

[0032] The first frame 60 has an L-shaped cross-section and includes a front piece 60a fixed to the back of the flexible display body 22, and an upper piece 60b that is bent backward from the upper end of the front piece 60a. The upper ends of the flexible display body 22 and the front piece 60a are approximately coincident. The second frame 62 has an L-shaped cross-section similar to the first frame 60 and includes a front piece 62a and an upper piece 62b. The second frame 62 is located slightly below the first frame 60, and there is a gap G between the upper piece 60b and the upper piece 62b.

[0033] The strip material 52 is fixed to the second frame 62 via a fastener 64. The fastener 64 is L-shaped and fits into the inner corner formed by the front piece 62a and the top piece 62b of the second frame 62. The strip material 52 is bent by being sandwiched between the second frame 62 and the fastener 64, and this bent tip 52a is fixed to the top piece 62b by a screw 66a and a nut 66b. The screw hole 62bb through which the screw 66a passes is an elongated hole in the X direction, allowing for position adjustment. The three strip materials 52 are fixed in the same manner. In principle, the strip material 52 is not fixed to the flexible display body 22 along its entire length, and the two are in sliding contact with each other.

[0034] The upper rear surface of the front piece 60a in the first frame 60 and the lower front surface of the front piece 62a in the second frame 62 are connected by a retractable thin material 68, and the first frame 60 and the second frame 62 are relatively movable in the Y direction (winding and unwinding direction). The thin material 68 is provided across the entire width in the X direction of the first frame 60 and the second frame 62. As will be described later, the thin material 68 expands and contracts in accordance with the unwinding and winding of the flexible display body 22, contracting most when fully unwound (see Figures 1 and 8(a)) and expanding most when fully wound (see Figures 2 and 8(b)). Based on the state when the flexible display body 22 is fully unwound, the upper fixed area 68a of the thin material 68, covering about the upper 1 / 3, is fixed to the first frame 60, the lower fixed area 68b, covering about the lower 1 / 3, is fixed to the second frame 62, and the remaining area expands and contracts. The thin material 68 is fixed, for example, by adhesive or bonding agent. The thin material 68 has sufficient elasticity and does not hinder the biasing force of the coil spring 74, which will be described below.

[0035] Figure 7 is a perspective view of the circumference difference absorption mechanism 70 provided on the operating bar 58. Figure 8 is a schematic cross-sectional view of the circumference difference absorption mechanism 70, where (a) shows the flexible display body 22 when it is fully unwound and (b) shows it when it is fully wound up. As described above, the flexible display body 22 is a laminate consisting of multiple layers, and a difference of length L1 may occur at the end due to the path difference between the inner circumference and the outer circumference on the first axis 12, but an even larger difference of length L2 (see Figure 4) may occur between the flexible display body 22 and the strip material 52. This is because the flexible display body 22 and the strip material 52 overlap, increasing the overall thickness. The maximum value of length L2 is, for example, about 8 mm. The circumference difference absorption mechanism 70 absorbs the circumference difference of length L2 caused by the flexible display body 22 and the strip material 52. The circumference difference absorption mechanism 70 is provided in two locations that are symmetrically positioned and appropriately separated (see Figure 1), but the number may be increased or decreased depending on the size of the flexible display unit 22.

[0036] The circumference difference absorption mechanism 70 includes a guide pin 72 and a coil spring (elastic body) 74. The thin material 68 mentioned above can also be part of the circumference difference absorption mechanism 70. The guide pin 72 is provided in a screw hole 60ba in the upper surface piece 60b of the first frame 60, and the upper screw portion 72a is screwed into the screw hole 60ba and protrudes downward (in the winding direction of the flexible display body 22). The means for fixing the guide pin 72 may be a nut or press-fit. The pin portion 72b of the guide pin 72 below the screw portion 72a is moderately long and is inserted through the guide hole 62ba of the upper surface piece 62b of the second frame 62 and protrudes further downward. The guide hole 62ba is slightly larger in diameter than the pin portion 72b, resulting in less friction.

[0037] The coil spring 74 is provided so as to surround the guide pin 72 in the gap G formed between the upper surface piece 60b and the upper surface piece 62b. The coil spring 74 is a compression spring and presses against the lower surface of the upper surface piece 60b and the upper surface of the upper surface piece 62b, respectively, using them as seating surfaces and biasing the first frame 60 and the second frame 62 in a direction that separates them. In other words, the first frame 60 is always biased upward relative to the second frame 62 by the action of the coil spring 74.

[0038] As shown in Figure 8(a), when the flexible display body 22 is fully unwound, the coil spring 74 is compressed from its natural length, biasing the first frame 60 upward. This prevents the flexible display body 22 from bending.

[0039] As shown in Figure 8(b), when the flexible display body 22 is fully wound, a perimeter difference is created between the flexible display body 22 and the strip material 52 by the first axis 12, as described above. As a result, the first frame 60 and the second frame 62 are slightly separated in the Y direction, and the gap G widens. In contrast, in the display device 10 according to this embodiment, the first frame 60 and the second frame 62, which are provided at the unwinding end, are not fixed and can move relative to each other in the Y direction, thus absorbing the perimeter difference. That is, the first frame 60 tends to displace relatively in the unwinding direction as indicated by arrow Ya, and the second frame 62 tends to displace relatively in the winding direction as indicated by arrow Yb. Although a force in the peeling direction is applied between them, they are not fixed to each other in the Y direction, and relative displacement is permitted. Therefore, distortion of the flexible display body 22 and the strip material 52 can be prevented.

[0040] In the circumference difference absorption mechanism 70, the guide pin 72 is guided in the Y direction without tilting because it is inserted into the guide hole 62ba of the second frame 62. In addition, the guide pin 72 has a guiding function that ensures the coil spring 74 expands and contracts properly in the Y direction.

[0041] Figure 9 is a schematic cross-sectional view of the perimeter difference absorption mechanisms 70A and 70B according to modified examples, where (a) is a diagram of the perimeter difference absorption mechanism 70A according to the first modified example, and (b) is a diagram of the perimeter difference absorption mechanism 70B according to the second modified example.

[0042] As shown in Figure 9(a), in the circumference difference absorption mechanism 70A, a dovetail groove 60aa is formed on the rear surface of the front piece 60a of the first frame 60, and a fitting projection 62aa is formed on the front surface of the front piece 62a of the second frame 62. The fitting projection 62aa has a trapezoidal cross-section that fits into the dovetail groove 60aa. Because the fitting projection 62aa is guided by the dovetail groove 60aa, the first frame 60 and the second frame 62 can move relative to each other in the Y direction, but displacement in the other two directions is restricted. In the circumference difference absorption mechanism 70A, there is no thin material 68 as described above, and instead the dovetail groove 60aa and the fitting projection 62aa serve as means for relative movement between the first frame 60 and the second frame 62.

[0043] As shown in Figure 9(b), in the circumference difference absorption mechanism 70B, a guide tube 62bc that is slightly longer than the upper piece 62b of the second frame 62 protrudes downward. The guide hole 62ba is formed coaxially along the entire length of the guide tube 62bc. The pin portion 72b of the guide pin 72 fits into the slightly longer guide hole 62ba and moves back and forth, so that the first frame 60 and the second frame 62 can move relative to each other in the Y direction, but displacement in the other two directions is restricted. In the circumference difference absorption mechanism 70B, the thin material 68 mentioned above is absent, and instead the guide tube 62bc serves as the means for relative movement between the first frame 60 and the second frame 62.

[0044] The operating bar 58 and the circumference difference absorption mechanisms 70, 70A, and 70B are applied to a manually operated display device 10 for unwinding and rewinding the flexible display body 22, but may also be applied to an automatically operated display device using a motor. The retractable display is not limited to the OLED 46.

[0045] The present invention is not limited to the embodiments described above, and can be freely modified without departing from the spirit of the invention. [Explanation of Symbols]

[0046] 10 Display device 12 1st axis (axis) 14 2nd axis 16 sheets 18 Constant load spring 18A First constant load spring 18B Second constant load spring 22 Flexible display unit 46 OLED 50 Backseat 52 strip material 58 Control Bar 60. First Frame 60a front piece 60b Top piece 60ba screw hole 62. Frame 2 62a Front piece 62b Top piece 62ba guide hole 64 Fixtures 68 Thin material 70, 70A, 70B Perimeter Difference Absorption Mechanism 72 Guide pins 72a Threaded part 72b Pin section 74. Coil spring (elastic body)

Claims

1. A flexible display unit that is wound up and unwound on an axis, A strip material is provided which is arranged on the non-display side of the flexible display body, which is wound and unwound together with the flexible display body on the shaft, and which maintains the flexible display body in a straight line when unwound. A first frame provided at the unwinding end of the flexible display body, A second frame is provided at the unwinding end of the strip material and is movable relative to the first frame in the winding and unwinding direction, An elastic body that biases the first frame and the second frame in a direction that separates them, has A display device characterized by the following features.

2. In the display device according to claim 1, The first frame and the second frame are connected by a stretchable thin material. A display device characterized by the following features.

3. In the display device according to claim 1, The first frame has a guide pin that protrudes in the winding direction, The second frame has a guide hole through which the guide pin is inserted. The elastic body is a coil spring, and is provided between the first frame and the second frame so as to surround the guide pin. A display device characterized by the following features.

4. In the display device according to claim 1, The first frame and the second frame are provided across the entire width of the flexible display body. A display device characterized by the following features.

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