Telescopic lighting fixture

Abstract

The present invention relates to a telescopic lighting fixture comprising: an elongated drum rotatable on a length axis; and a flexible multi-layer lighting sheet movable between a retracted position and an extended position, wherein the multi-layer lighting sheet is at least partially retracted in one or more windings around the drum in the retracted position, and the multi-layer lighting sheet is fully unwound from the drum in the extended position; said multi-layer lighting sheet comprising at least one LED layer having a first LED layer edge mounted at a first mounting position of said drum, and at least one diffusing optical layer having a first optical layer edge mounted at a second mounting position of said drum, said first mounting position being positioned at an arc length distance from said second mounting position.

Description

Technical Field

[0001] This invention relates to a retractable lighting device, also known as a poster-like display box, for use in events or for promotions in retail environments. Background Technology

[0002] Retractable lighting fixtures or poster-like display cases utilize flexible multilayer luminous foil that can be rolled up on rollers or drums for transport or storage. These poster-like display cases are used for events such as conventions or for promotions in retail environments such as shops, galleries, showrooms, etc. When unfolded, the flexible multilayer luminous foil presents itself as a display for lighting or advertising / information purposes.

[0003] US-B2-9803843 discloses an example of such a retractable lighting device or poster-like display box, wherein a flexible multilayer lighting foil includes an LED layer and an optical layer containing information. Both layers forming the flexible multilayer lighting foil are wound on a roller. When unfolded, specific spacing mechanisms connected to each layer are activated, thereby spacing the two layers to allow the LED layer to properly and effectively illuminate the optical layer containing information.

[0004] This makes the construction of US-B2-9803843 unnecessarily complex and expensive. Furthermore, the retractable lighting fixture of US-B2-9803843 hinders the (easy) replacement of the optical layer, which is essential for poster backlighting solutions. The object of this disclosure is to provide a retractable lighting fixture with a simplified construction that allows for proper and efficient illumination of an information-containing optical layer using an LED layer, and allows for the replacement of the optical layer. Summary of the Invention

[0005] According to a first aspect of this disclosure, a retractable lighting device is provided, comprising: a rotatable roller; and a flexible multilayer lighting sheet movable between a retracted position and an extended position beyond the retracted position, wherein the multilayer lighting sheet is at least partially retracted in one or more windings surrounding the rotatable roller in the retracted position, and the multilayer lighting sheet is fully extended from the rotatable roller in the extended position; wherein the multilayer lighting sheet includes at least one LED layer and at least one diffuse optical layer, the at least one LED layer having a first LED layer edge at a first mounting position mounted on the outer circumference of the rotatable roller, and the at least one diffuse optical layer having a first optical layer edge at a second mounting position mounted on the outer circumference of the rotatable roller, the first mounting position being positioned along the circumference at an arc length distance from the second mounting position.

[0006] By mounting the at least one LED layer and the at least one diffuse optical layer at different locations on the outer circumference of the roller, these layers will automatically space themselves apart when the roller is fully extended. No additional spacing mechanism is required, and due to the spacing, correct and efficient illumination of the information-containing optical layer created by the LED layer is achieved.

[0007] In the example, the arc length between the first and second mounting positions can be between 45° and 315°, particularly between 90° and 270°. Therefore, a specific spacing distance (equal to the chord of the corresponding arc length) between the layers can be achieved in either a fully unfolded or unwound extended orientation, thereby achieving the desired illumination of the optical layer and thus enabling optimal visualization and presentation of the information contained thereon.

[0008] In an advantageous example, the first and second mounting positions are located on opposite sides of the rotatable roller, thereby achieving a spacing (equal to the diameter of the roller) between the layers in either a fully unfolded or unwound extended orientation.

[0009] In another example according to this disclosure, the roller includes at least one additional mounting location different from the first and second mounting locations. Therefore, the at least one LED layer and the at least one optical layer can be mounted to the roller at several different mounting locations, thereby allowing easy replacement of one of the layers and also allowing easy selection of the correct spacing defined by the chord corresponding to the arc length between the respective mounting locations of the at least one LED layer and the at least one optical layer. The possibility of selecting the correct (chord) spacing between the layers allows for simple adjustment or selection of the appropriate desired illumination of the at least one optical layer using the LED layers.

[0010] Preferably, the mounting positions are positioned at equal arc lengths, such as 45°, 90° or 120°, to effectively present a retractable lighting fixture with a rotatable multi-spacing roller, thereby allowing the multi-layer lighting sheet to be spaced in a fully unfolded or unwound extended orientation, the spacing of which can be pre-selected by mounting at least one LED layer and at least one optical layer at the positions separated by the pre-selected arc lengths.

[0011] In the improvements of this disclosure, each of the first, second, and additional mounting positions is configured as a first, second, and additional recess, respectively, each recess being disposed in the outer circumference of the roller and configured to respectively receive one of the edges of the first LED layer and the first optical layer. This allows the LED and optical layer to be easily inserted into and secured to the rotatable roller.

[0012] Preferably, the grooves extend in the longitudinal direction of the roller, thereby allowing the free layer edges of each LED layer and optical layer to be properly accommodated in their respective grooves. Furthermore, improved winding and unwinding of the multilayer illumination sheet is achieved through the grooves present in the outer circumference of the rotatable roller and the free edges of the layers mounted therein, without the risk of folding, oiling, wrinkling, or damage to the two layers.

[0013] In another advantageous example, the multilayer illumination sheet includes an LED layer and two diffuse optical layers, wherein the two diffuse optical layers are mounted on either side of the LED layer's mounting location. In this example, with the multilayer illumination sheet fully extended and out of the housing, the LED layer is sandwiched between the two optical layers, which are extended on either side of the LED layer. Using this example, two diffuse optical layers can be simultaneously displayed and illuminated using a single LED layer.

[0014] In yet another example, the retractable lighting device includes at least one driver housed in the roller, the at least one driver being arranged to receive power and drive the LED layer based on the received power.

[0015] In a particular embodiment of the invention, at least one diffuse optical layer having identification characteristics is provided at the edge of a first optical layer, and a sensing element is provided near at least one of a first, second, or other location, the sensing element being configured to sense the identification characteristics of the at least one diffuse optical layer when mounted at the first, second, or other location.

[0016] The identification feature provided at the edge of the first optical layer can be a barcode (QR code), a perforated pattern, or an RFID tag, and can be sensed or detected by a sensing element mounted at one of the locations on the rotatable roller. In a particular instance, the sensing element is configured to control the driver in response to the sensed identification feature of at least one diffuse optical layer. Therefore, an adaptive lighting device is proposed that can adapt to the light output of the LED layer, thereby adapting the illumination of the optical layer.

[0017] Preferably, when the free layer edge of the at least one optical layer is mounted in the corresponding groove, the sensing element is accommodated in one of the grooves, thereby allowing the identification characteristics to be sensed correctly.

[0018] Preferably, in an example according to this disclosure, the at least one diffuse optical layer is made of a material that is at least partially transparent.

[0019] In another example, the opposing surfaces of the LED layer and at least one diffuse optical layer are configured to reflect visible light. Therefore, light emitted from the LED layer toward the optical layer and partially reflected back to the LED layer is reflected back to the optical layer. This light recycling process improves the overall illumination of the optical layer and reduces the light spot on the optical layer.

[0020] In the details of the above example, a reflective film is disposed on the surface of the LED layer and the at least one diffuse optical layer facing each other.

[0021] In yet another advantageous embodiment according to this disclosure, one or more counterweight elements are provided at the edges of the second LED layer of the LED layer and the edges of the second optical layer of the diffuse optical layer. This ensures the effective and complete deployment of the multilayer illumination sheet and provides stability for windy outdoor conditions.

[0022] Retractable lighting equipment may also include a light shielding device configured to shield the light emitted by the LED layer to prevent it from leaving or leaking out of the multilayer lighting sheet from the space or gap between the LED layer and the optical layer along its longitudinal side edge.

[0023] In one example, the light shielding device is retractably mounted to a rotatable roller, or it is mounted to and extends along the longitudinal side edges of the LED layer. In either example, this prevents light emitted by the LED layer from escaping the multilayer illuminator along its two longitudinal side edges. With the gap or space between the two layers closed, non-interfering direct light from the LEDs on the LED layer can be seen, and optical efficiency and light uniformity are also improved.

[0024] According to a second aspect of this disclosure, a retractable lighting device is provided, comprising: a housing; an elongated roller rotatable along a length axis and housed within the housing; and a flexible LED sheet movable between a retracted position and an extended position, the extended position being more than the retracted position, the flexible LED sheet being at least partially retracted in one or more windings surrounding the roller in the retracted position, and the flexible LED sheet being unfolded from the roller and extended from the housing via an exit position in the extended position; and at least one diffuse optical layer having a first optical layer edge mounted at a first mounting position on the housing, the first mounting position being different from the exit position.

[0025] This example of a retractable lighting fixture allows the flexible LED sheet to be unfolded to any desired length in its extended position. Thus, the flexible LED sheet can be adapted to match the length of the optical layer, thereby achieving optimal illumination of the information contained on the optical layer.

[0026] In another example, the exit position is configured as an exit opening that extends along the length axis of the housing, and is specifically configured as a slit-shaped exit opening.

[0027] Alternatively, the retractable lighting device of the present invention can be described as follows:

[0028] The retractable lighting fixture includes: an elongated roller that can rotate along its length axis; and an LED layer and a diffuser layer carried by the roller.

[0029] The diffuse optical layer is movable between a retracted position and an extended position beyond the retracted position, wherein the diffuse optical layer is at least partially retracted in one or more windings surrounding the roller in the retracted position, and wherein the diffuse optical layer is fully extended from the roller in the extended position.

[0030] The LED layer is mounted such that the edge of the first LED layer is located at a first mounting position on the outer surface of the roller, and the diffuse optical layer is mounted such that the edge of the first optical layer is located at a second mounting position on the outer surface of the roller. The first mounting position is positioned at a distance of an arc length from the second mounting position, or...

[0031] The LED layer is housed within the roller and is movable between a retracted position and an extended position beyond the retracted position. In the retracted position, the LED layer is at least partially retracted into the roller, which is in one or more windings surrounding a carrier extending along a length axis inside the roller. In the extended position, the LED layer unfolds from the carrier and extends from the roller via a departure position. The diffuse optical layer is mounted such that its first optical layer edge is located at a first mounting position on the outer surface of the roller, which is different from the departure position. The carrier within the roller and the roller are rotatable relative to each other.

[0032] Therefore, when containing a carrier, the roller can be considered as the shell, and the carrier inside the roller is considered as the roller itself. Attached Figure Description

[0033] The invention will now be discussed with reference to the accompanying drawings, in which:

[0034] Figure 1 This is an example of a retractable lighting device based on the current state of technology;

[0035] Figure 2 Examples of retractable lighting equipment according to this disclosure;

[0036] Figure 3A Details of examples of retractable lighting equipment according to this disclosure;

[0037] Figure 3B This is another detail of the example of retractable lighting equipment according to this disclosure;

[0038] Figure 3C-3D Further details are provided regarding examples of retractable lighting equipment based on this disclosure;

[0039] Figure 4A This is another example of a retractable lighting device according to this disclosure;

[0040] Figure 4B-4C It is based on Figure 4A Details of another publicly disclosed example of retractable lighting equipment;

[0041] Figures 5A-5B This is yet another example of a retractable lighting device according to this disclosure;

[0042] Figure 6 This is another example of a retractable lighting device according to this disclosure;

[0043] Figures 7A-7D are yet another example of a retractable lighting device according to this disclosure. Detailed Implementation

[0044] In order to properly understand the present invention, in the following detailed description, corresponding elements or parts of the present invention will be indicated by the same reference numerals in the accompanying drawings.

[0045] Figure 1 The image, labeled as prior art, describes a known example of a retractable lighting fixture or a poster-like display box, indicated by reference numeral 10. The retractable lighting fixture 10 includes a housing 11 and a flexible multilayer lighting sheet 20 retractably held within the housing 11. When housed within the housing 11, the multilayer lighting sheet 20 includes an LED layer 21 and an optical layer 22 adjacent to or laid on the LED layer 21.

[0046] LED layer 21 includes a plurality of LEDs 210 thereon and may optionally include electrical connections extending to the LEDs 210. In an alternative embodiment, the electrical connections may be provided to the LEDs 210 separate from LED layer 21. All LEDs 210 are positioned such that most of the light emitted from LEDs 210 is directed primarily toward optical layer 22. Optical layer 22 may be a flexible optical diffuser containing information for illumination by LED layer 21 and for display. In some embodiments, optical layer 22 may additionally or alternatively include a phosphor to alter the color of the light emitted therethrough.

[0047] The multilayer illumination sheet 20 is formed as a flexible multilayer illumination sheet foil comprising an LED layer 21 and an optical layer 22, which can be rolled up on a roller or drum 12 for transport or storage. Thus, the optical layer 22 and the LED layer 21 are mounted together, with their respective free layer edges 22a and 21a located at a common mounting position 12-1 on the outer circumference 12a of the drum 12 (and another free layer edge 22a-21b of the optical layer 22 and the LED layer 21 extending to the outside of the housing 11). This mounting configuration allows the multilayer illumination sheet 20 to move between a retracted position and an extended position, wherein in the retracted position, the multilayer illumination sheet 20 is more or less retracted in one or more windings around the rotatable drum 12 within the housing 11, while in the extended position, the multilayer illumination sheet 20 is fully unfolded from the rotatable drum 12 and extends from the housing 11.

[0048] The fully extended position is at Figure 1 As shown in the diagram. This poster-like display box is used for events (such as conventions) or for promotions in retail environments (such as shops, galleries, showrooms, etc.). When unfolded, the flexible multilayer illuminated foil presents itself as a display for lighting or advertising / information purposes, wherein the optical layer 22 is illuminated by the enabled LED layer 21. For proper illumination, the diffuse optical layer 22 needs to be spaced from the LED layer 21 at an appropriate distance d, in particular to minimize the appearance of the light spot pattern from the enabled LED 210, and / or may help to mix the light output from the multicolor LED 210.

[0049] In an example according to the prior art, the LED layer 21 and optical layer 22 of the multilayer illumination sheet 20 are arranged to each other in an extended spacing relationship downstream of a pair of compression rollers 13a-13b, and in a compressed relationship upstream of the compression rollers 13a-13b. When in an extended orientation, the LED layer 21 and optical layer 22 are separated from each other by a spacing mechanism 23 existing between the two layers and maintained in a desired spaced orientation, where the spacing mechanism 23 is a mechanical canopy component, such as a foldable canopy arm.

[0050] Figure 2 An example of a retractable lighting device according to this disclosure is depicted, having a less complex and less expensive construction as is currently known in the art. The example according to this disclosure also allows for easy replacement of the optical layer 22, which is essential for poster backlighting solutions, wherein another optical layer 22 contains differentiating information to be displayed and illuminated.

[0051] An example of a retractable lighting device according to the invention is indicated by reference numeral 100 and includes a housing 11 with end caps 110a-110b at its two open ends, and an elongated rotatable roller 120 (not shown) housed within the housing 11. Note that the housing 11 is not an essential part of several examples of the retractable lighting devices of this disclosure described in this application. Similar to Figure 1 A prior art example includes a multilayer illumination sheet 20 comprising an LED layer 21 and at least one diffuse optical layer 22, housed around a roller 120 located in one or more windings. The at least one optical layer 22 may be a flexible optical diffuser containing information for illumination by the LED layer 21 and for display.

[0052] exist Figure 2 In this illustration, the multilayer illumination sheet 20 is depicted in an extended position, wherein the multilayer illumination sheet 20 is unfolded from an elongated rotatable roller 120 and extends from the housing 11. Thus, the elongated roller 120 is rotatable along its longitudinal axis 120q. In this example, the multilayer illumination sheet 20 includes an LED layer 21 and a diffuse optical layer 22. In this extended position, both the LED layer 21 and the optical layer 22 are held in a desired spaced-apart orientation, separated by a distance d, which is measured accordingly between the outer lowest free-hanging layer edges 21b and 22b.

[0053] Figure 3a shows in more detail the extended positions or orientations of the LED layer 21 and the optical layer 22, illustrating a schematic side view of the roller 120 of an example of the retractable lighting fixture 100. Note that the schematic diagram does not necessarily show the components of the retractable lighting fixture 100 to scale, but is intended only to disclose the functional characteristics of this example.

[0054] In Figure 3a, the roller 120 has a cylindrical structure with a diameter D and a longitudinal dimension that is approximately similar to the longitudinal dimension of the housing 11. The LED layer 21 is also provided with a plurality of LED elements 210 and has a first LED layer edge 21a mounted at a first position on the outer circumference 120a of the rotatable roller 120, indicated by reference numeral 120-1. Similarly, the diffuse optical layer 22, containing information to be illuminated and displayed by the LED layer 21, has a first optical layer edge 22a mounted at a second position on the outer circumference 120a of the rotatable roller 120, indicated by reference numeral 120-2.

[0055] As shown in Figure 3a, the first position 120-1 is located at a certain distance from the second position 120-2. In particular, the first position 120-1 is positioned along the circumference 120a at an arc length S from the second position 120-2. 1-2As the LED layer 21 and the diffuse optical layer 22 are both mounted at different positions 120-1 and 120-2 on the outer circumference 120a of the roller 120, when unfolded and extended from the housing 11, the two layers 21-22 will be at a distance d. 1-2 (This distance, measured between the edges 21b and 22b of the two free-fall layers, is automatically spaced.) No additional spacer mechanism is required, and due to the spacer d... 1-2 Therefore, it is possible to achieve correct and effective illumination of the information-containing optical layer using the LED layer.

[0056] The spacing d between the LED layer 21 and the diffuse optical layer 22 1-2 This can be considered equal to the chord length between the first position 120-1 and the second position 120-2 at the outer circumference 120a of the roller 120. In this particular example of Figure 3a, the first position 120-1 and the second position 120-2 are located on opposite sides of the rotatable roller 120, approximately at 180°. Arc length S 1-2 Therefore, it is a semicircle and equal to 1 / 2πD, where D is the diameter of roller 120. Similarly, it corresponds to the arc length S. 1-2 The corresponding chord length or distance d 1-2 The spacing d is defined between two layers in either a fully unfolded or unwound extended orientation. 1-2 It is equal to the diameter D of the roller 120.

[0057] Figure 3b shows another configuration example for the roller 120' in the retractable lighting device 100 according to the present disclosure, wherein a first position 120-1 is the mounting position of the free layer edge 21a of the LED layer 21, and another mounting position 120-3 is the mounting position of the free layer edge 22a of the optical layer 22. The other mounting position 120-3 is also located at a distance from the first position 120-1, however, this distance differs from the example in Figure 3a. Specifically, the first position 120-1 is positioned along the circumference 120a at an arc length S from the other position 120-3. 1-3 At that point, the arc length S 1-3 Corresponding to 90°. When fully unfolded and extended from the housing 11, the LED layer 21 and the diffuse optical layer 22 will be at a distance d. 1-3 They are spaced apart from each other, and similarly, the distance d 1-3 The measurements were taken between the edges 21b and 22b of the free-fall layer.

[0058] The spacing d between the LED layer 21 and the diffuse optical layer 22 1-3 The arc length S is equal to the chord length between the first position 120-1 and another position 120-3 on the outer circumference 120a of the roller 120. In the example of Figure 3b, the arc length S is... 1-3It is a quarter circle equal to 1 / 4·π·D, where D is the diameter of the roller 120.

[0059] Preferably, the arc length s between the mounting positions of the free layer edge 21a of the LED layer 21 and the free layer edge 22a of the optical layer 22 can be between 30° and 330°, for example, between 45° and 315°, and particularly between 90° and 270°. Therefore, the specific spacing d between the two layers 21-22 (equal to the chord length of the corresponding arc length s) can be obtained in either a fully unfolded or unwound extended orientation, thereby achieving the desired illumination of the optical layer 22 and thus achieving optimal visualization and presentation of the information contained thereon.

[0060] Figure 3c shows a schematic example of a roller 120” used in a retractable lighting device 100 according to the present disclosure, wherein several different mounting positions, designated 120-1, 120-2, 120-3, 120-4, and 120-5, are used for any free layer edge 21a-22a of the LED / optical layers 21-22. The mounting positions 120-1, 120-2, 120-3, 120-4, and 120-5 are oriented at angles of 0°-180°-90°-135° and 270°, respectively, at the outer circumference 120a of the roller 120”.

[0061] For example, as shown in Figures 3c and 3d, several installation positions (first position 120-1, second position 120-2, and another position 120-x, where the suffix x is 3, 4, 5, ..., etc.) are positioned at the outer circumference 120a of the roller 120” with equidistant arc lengths (e.g., equidistant arc lengths of 90° or 120°). In Figure 3c, installation positions 120-1 / 120-3 / 120-2 / 120-5 are each positioned with equidistant arc lengths of 90° (s = 1 / 4·π·D), while in Figure 3d, installation position 120-1 / 1... Positions 20-6 and 120-7 are each positioned with an equidistant arc length of 120° (s = 1 / 3·π·D). Similarly, in Figure 3d, mounting positions 120-1 and 120-2 are each positioned with an equidistant semicircular arc length of 180° (s = 1 / 2·π·D). These examples effectively demonstrate a retractable lighting fixture with a rotatable, multi-spaced roller, allowing the multi-layered lighting sheet to be spaced in either an unfolded or unwound extended orientation, the spacing of which can be pre-selected by mounting the LED layer 21 and the optical layer 22 in positions separated by a pre-selected arc length.

[0062] Another example of a retractable lighting device according to this disclosure is shown in Figures 4a and 4b and is indicated by reference numeral 100. In this embodiment, a roller 120 is housed in a housing 11, which is then concealed at its open free end by end caps 110a-110b. The roller 120 includes a first groove 121-1 at its outer circumference 120a, located at a position indicated as a first position 120-1 in several Figures 3a-3d. The roller 120 also includes a second groove, indicated by reference numeral 121-4, because the groove is located at the outer circumference 120a of the roller 120''' and at a position indicated, for example, by reference numeral 121-4 in Figure 4c. The two grooves 121-1 and 121-4 are connected by an arc length S equal to 135°. 1-4 They are separated from each other.

[0063] The roller 120''' accommodates several windings of the multilayer illumination sheet 20, wherein the first groove 121-1 accommodates the free LED layer edge 21a of the LED layer 21, and the second groove 121-4 accommodates the free optical layer edge 22a of the optical layer 22. This allows the LEDs and optical layers 21-22 to be easily inserted into and secured to the rotatable roller 120'''.

[0064] Grooves 121-1 and 121-4 extend in the longitudinal direction of roller 120''', as shown in FIG4a, thereby allowing the free layer edges of optical layer 22 and LED layer 21 to be properly accommodated over the entire layer width in their respective grooves. Furthermore, several grooves exist in the outer periphery 120a of the rotatable roller 120, and the free edges 21a or 22b of the layers are mounted therein, thus achieving improved winding and unwinding of the multilayer illumination sheet 20 without the risk of folding, oiling, wrinkling, or damage to the two layers.

[0065] In an improvement of this disclosure, as shown in FIG. 4c, the rotatable roller 120 at its outer circumference 120a includes at least one additional groove at a location different from the first and second positions. In FIG. 4c, the additional groove is indicated by reference numeral 121-7 and is located at position 120-7 as shown in FIG. 3d. The additional groove 121-7 has an arc length S of 240°. 1-7 (S) 1-7 = 2 / 3·π·D), the arc length S 1-7 It has a first position / groove 120-1 / 121-1, and the additional groove 121-7 has an arc length S of 240°-135°=95°. 4-7 (S) 4-7 ≈ 1 / 4·π·D), the arc length S 4-7It has a second position / groove 120-4 / 121-4. This allows the LED layer 21 and optical layer 22 to be mounted to the roller 120''' at several different locations, thereby allowing easy replacement of one of the layers, and allowing selection of the arc length S between the corresponding two selected mounting positions of the LED layer 21 and optical layer 22. 1-4 or S 1-7 or S 4-7 The correct interval d defined by the chord 1-4 d 1-7 or d 4-7 .

[0066] The possibility of selecting the correct (chord) spacing between layers 21 and 22 allows for easy adjustment or selection of the appropriate desired illumination for the optical layer 22 using the LED layer 21. Note that Figure 4c depicts only three grooves 121-x as examples only, and the roller 120 may be provided with multiple grooves 121-x (where x ∈ [1 ...... N], and N is a natural number) having any desired arc length orientation as shown in Figures 3a-3d.

[0067] The roller 120 may be partially hollow to accommodate one or more LED drivers 123 for receiving power and driving the LED layer 21 based on the received power. A power supply (not shown) may also be retained within the roller 11 and may be embodied as a (rechargeable) or otherwise replaceable battery pack. In some embodiments, one or more LED drivers 123 may be electrically coupled to mains power via suitable circuitry (printed circuit board circuitry). Furthermore, solar panels and / or other external power sources may be used as power supplies for the drivers 123. In alternative embodiments, the power supply may be located outside the roller 120 or housing 11.

[0068] To properly and securely mount the free layer edges 21a-22a of the LED layer 21 and optical layer 22 into any of the grooves present in the rollers 120-120'-120''-120'''-120''', a clamping device can be accommodated in each groove. The clamping device can form a narrow internal space within the groove (e.g., shown as groove 121-1 in the figure) to clamp the free layer edge 21a of the LED layer 21, wherein two side portions of the LED layer 21 abut against the wall of the groove 121-1. This clamping mechanism also ensures proper electrical contact between the actuator 123 and an electrical connector (not shown) present in the groove 121-1, which is electrically connected to an electrical connector present on the LED layer 21, which then extends within the LED layer 21 toward a plurality of LEDs 210 for energizing the LEDs 210.

[0069] In a particular example according to this disclosure, the clamping device may be configured as a spherical clamping mechanism comprising a plurality of balls or rods 122-4 and 122-7 housed in each of the recesses 121-4 and 121-7 for clamping the free layer edge 22a of the optical layer in the recesses 121-4 or 121-7. See also Figure 4c.

[0070] Alternatively, each groove 121-x can be configured as a small slit passing through the circumference 120a of the roller 120. The first layer edges 21a-22a of each LED layer 21 and diffuse optical layer 22 can be provided with thickened ridges. By sliding the layers 21-22 in their respective slits, the thickened ridges will extend inside the roller and behind the slits, thereby preventing the release of the respective layers.

[0071] The optical layer 22 may provide a useful identification feature represented by 22z at its free optical layer edge 22a. The identification feature 22z provided at the optical layer edge 22a may be a barcode (QR code), a punched pattern, or an RFID tag, and may identify the optical layer (e.g., based on the optimal illumination settings of the optical layer). Preferably, in the vicinity of each of the grooves 121-x (where x ∈ [1...... N], N is a natural number), sensing elements 124-4 (124-7) may be disposed in the corresponding groove as shown in FIG. 4c, or disposed in the roller 120''' as shown in FIG. 4b and adjacent to each groove.

[0072] When the optical layer 22 is mounted and its free layer edge 22a is in any mounting position segment within any recess, the sensing elements 124-4 (124-7) can sense the identification characteristic 22z of the diffuse optical layer 22. In a particular instance, the identification characteristic 22z defines the optimal illumination setting for the associated optical layer, and the sensing element 124-x (where x ∈ [1 ......N], and N is a natural number) can control the driver 123 in response to the sensed identification characteristic 22z of the diffuse optical layer. For example, using the identification characteristic 22z characterizing the optimal illumination setting of the associated optical layer 22, an adaptive lighting device 100 can be used, which is capable of adjusting the light output of the LED layer 21, and thus optimally adjusting the illumination of the optical layer 22 mounted in the recess.

[0073] In order to facilitate the effective and complete deployment of the multilayer illumination sheet 20, and also to maintain stability under windy outdoor conditions, one or more counterweight elements are provided at the second LED layer edge 21b of the LED layer 21 and the second optical layer edge 22b of the diffuse optical layer 22, for example as counterweight bars that extend over the entire width of layers 21-22 and work in the material of each layer near its layer edges 21b-22b.

[0074] Figures 5a and 5b show another example of a retractable lighting device 100 according to the present disclosure. Figures 5a and 5b show the specific construction of a multilayer lighting sheet 20 including an LED layer 21' and two diffuse optical layers 221 and 222. The associated roller 120'''' in this example has three mounting positions, denoted by 120-1, 120-8, and 120-9. Similarly, as shown in Figures 4a-4c, mounting positions 120-1, 120-8, and 120-9 are configured as grooves 121-1, 121-8, and 121-9 in the outer circumference 120a of the roller 120'''' and extend in its longitudinal direction.

[0075] In this example, with the multilayer illumination sheet 20 fully unfolded from the roller 120' and extending out of the housing, the LED layer 21' is sandwiched between two diffuse optical layers 221 and 222, which are unfolded on either side of the LED layer 21'. The LED layer 21' is a so-called double-sided LED layer having two LED groups, each group comprising multiple LEDs 210-1 and 210-2, wherein each group of LEDs 210-1 / 210-2 is disposed on either surface 21f1 and 21f2. Optionally, each layer 21f1-21f2 may include electrical connectors extending to each group of LEDs 210-1 / 210-2. In an alternative embodiment, the electrical connectors may be provided to LEDs separate from the LED layer 21'.

[0076] Both sets of LEDs 210-1 / 210-2 of the double-sided LED layer 21' are positioned such that most of the light emitted from them is directed primarily toward each optical layer 221 and 222 facing either LED layer surface 21f1 or 21f2. Using this example, two diffuse optical layers 221 and 222 can be simultaneously displayed and illuminated with a single double-sided LED layer 21'.

[0077] In another example, preferably, two drivers 123 housed in the roller 120'''' are used to power the retractable lighting fixture (with the clamped multilayer lighting sheets 20-21'-221 and 222 of Figures 5a and 5b) including the roller 120'''', so as to independently power each group of LEDs 210-1 and 210-2 disposed on either surface 21f1-21f2 of the double-sided LED layer.

[0078] Therefore, referring to the examples in Figures 4b and 4c, and also in Figures 5a and 5b, near each mounting position 120-8 and 120-9, or in each corresponding recess 121-8 and 121-9, sensing elements 122-8 and 122-9 can be accommodated for sensing the identification characteristics 22z of any diffuse optical layer 221 and 222, which is mounted such that its first layer edges 22a1 and 22a2 are located at the mounting position segment in any recess.

[0079] Similarly, when the recognition characteristics 22z of the corresponding diffuse optical layers 221 and 222 define the optimal illumination setting for the associated optical layer, the sensing elements 122-8 and 122-9 can control the driver 123 or a separate driver associated with one of the LED groups 210-1 / 210-2 in response to the sensed recognition characteristics 22z of the diffuse optical layers 221 and 222. Thus, the illumination of the two optical layers 221 and 222 holding the bifacial LED layer 21' can be optimally adapted by one bifacial LED layer 21'.

[0080] Referring to several configurations at the installation locations shown in Figures 3a-3d, the arc length S between the installation locations 120-1, 120-8, and 120-9 is... 1-8 S 1-9 and S 8-9 The mounting positions can be arbitrarily chosen. In the example of Figure 5a, mounting position 120-1 is used to accommodate the first layer edge 21a of LED layer 21', while mounting positions 120-8 and 120-9 are used to accommodate the corresponding first layer edges 22a1 and 22a1 of the two diffuse optical layers 221 and 222, respectively. It is clear from Figures 5a and 5b that mounting positions 120-8 and 120-9 of the two diffuse optical layers 221 and 222 are located on either side of mounting position 120-1 of LED layer 21'.

[0081] In other words, in this example, mounting positions 120-8 and 120-9 are located at arc lengths equidistant from but opposite in direction from the centrally located mounting position 120-1. For example, when mounting position 120-1 is located at 0° / 360° (see Figures 3c and 3d together), mounting position 120-8 can be located at 30°-40°-45°-60°-90°, and mounting position 120-9 can be located at corresponding equidistant but opposite positions at 330°-320°-315°-300°-270°. Alternatively, the roller 120'''' may be provided with a centrally oriented mounting position 120-1 for the double-sided LED layer 21' and several mounting positions (equidistant or non-equidistant) on either side of the mounting position 120-1, thereby allowing for more versatile roller constructions, wherein the two diffuse optical layers 221 and 222 of the multilayer illuminator 20-21'-221-222 can be mounted at different positions equidistant from the central mounting position 120-1, or, if desired, the two diffuse optical layers 221 and 222 of the multilayer illuminator 20-21'-221-222 can be mounted at different arc length positions relative to the central mounting position 120-1.

[0082] Figure 6 Another example of a retractable lighting device 100 according to this disclosure is disclosed. The elements of the light shielding device are designed to shield light emitted by the LED layer 21 from passing through the space or gap d between the LED layer 21 and the optical layer 22 (see also). Figure 2 The elements of the light shielding device leave or protrude from the multilayer illumination sheet 20, passing through the corresponding longitudinal side edges 21c1; 22c1; 21c2; 22c2 of the LED layer 21 and the bottom layer edge 21b; 22b of the optical layer 22.

[0083] In one example, the light shielding device is telescopically mounted to an elongated roller 120, which is rotatable about its longitudinal axis 120q. In another embodiment, the light shielding device, particularly the shielding element or shielding sheet, is mounted to the longitudinal side edges 21c1; 21c2 of the LED layer 21 by means of Velcro, magnetic strips, or zipper locks and extends along the longitudinal side edges 21c1; 21c2, and the light shielding device, particularly the shielding element or shielding sheet, is mounted to the bottom layer edge 21b of the LED layer 21 by means of Velcro, magnetic strips, or zipper locks. This prevents light emitted by the LED layer 21 from escaping the multilayer illuminator 20 along its two longitudinal side edges. With the gap or space d between the two layers 21-22 closed, interfering direct light from the LED 210 on the LED layer 21 is not visible, and optical efficiency and light uniformity are also improved.

[0084] The light shielding device (shielding element or shielding sheet) can also be used with the double-sided LED layer 21' of Figures 5a and 5b. When using the example double-sided LED layer 21', the shielding element or shielding sheet is mounted in a similar manner to the double-sided LED layer 21' and extends along the longitudinal side edges 21c1; 21c2 in two opposing orientations to the bottom layer edge 21b of the LED layer 21'. The shielding element or shielding sheet shields the two gaps d1 and d2 formed between the optical layers 221 and 222 and the double-sided LED layer 21'. The mounting of the shielding element or shielding sheet to the double-sided LED layer 21' and / or the optical layers 221 and 222 can be achieved in a similar manner, for example by means of a Velcro, magnetic strip, or zipper lock.

[0085] Similarly, light emitted in both directions by the double-sided LED layer 21' toward the optical layers 221 and 222 is blocked to prevent it from escaping from the multilayer illumination sheet 20 along its two longitudinal side edges. With the gaps or spaces d1-d2 closed, interfering direct light from LEDs 210-1 and 210-2 cannot be seen, and optical efficiency and light uniformity are also improved.

[0086] When the flexible multilayer illumination sheet 20 is retracted into the housing 11 by winding it within several windings (located on the roller 120), the shielding element can be removed from the (double-sided) LED layers 21-21' (by means of a releasable Velcro, magnetic strip, or zipper lock connection), or alternatively, the shielding element can be folded together with the (double-sided) LED layers 21-21' and retracted into the housing 11 together with the multilayer illumination sheet 20.

[0087] In all the examples shown in the figures, the diffuse optical layer 22 (or optical layers 221 and 222) may be made of at least partially transparent material. Furthermore, the layer surface 21f of the LED layer 21 (21') (e.g., Figure 2 3a-3d, 4a-4c and Figure 6 The single-layer form of the LED layer 21 (21') and the facing surfaces 22f (22f1-22f2) of the LED layer 21 (21') and the double-layer form of the LED layer 22 (221 and 222) are configured to reflect visible light. Thus, light emitted from the LED layer 21 (21') toward the optical layer 22 (221 and 222) (and partially reflected back to the LED layer 21 (21')) is reflected back to the optical layer 22 (221 and 222). This light recycling process improves the overall illumination of the optical layer and reduces the light spot on the optical layer. In the details of the above example, each surface of the LED layer 21 (21') and the facing surfaces of the diffuse optical layer 22 (221 and 222) are provided with reflective films. Specifically, see [link to example]. Figure 2 (3a and 5b).

[0088] The film or foil applied to the surface of layers 21f (21f1-21f2) and 22f (22f1-22f2) can be made of polymers such as reflective PC, PMMA, PET, PS, and PP. In another example, the film or foil can be a mirror layer with a metal, such as aluminum added to or deposited on layers 21 (21') and 22 (221 and 222).

[0089] Figures 7a-7b Figures 7d and 7d depict another example of a retractable lighting device according to this disclosure. Again, this embodiment has a less complex and less expensive structure currently known in the art. Specifically, the examples according to this disclosure allow for easy replacement of the optical layer (in... Figures 7a-7b (Also indicated by reference numeral 22 in the 7D diagram), this is essential for poster backlighting solutions, where another optical layer 22 contains the differential information to be displayed and illuminated. Additionally, Figure 7a and 7b An example of a retractable lighting fixture allows the flexible LED sheet 21 to be unwound from the roller 1200 and housing 1100 to any desired length.

[0090] exist Figures 7a-7b In 7d, another example of a retractable lighting device according to this disclosure is indicated by reference numeral 1000. It also includes a housing 1100, which has end caps 110a-110b at its two open housing ends, as shown in the figures. Figure 7d As shown. Furthermore, an elongated roller 1200, rotatable on the length axis 1200q, is housed in a housing 1100. In the so-called retracted position, flexible individual LED layers 21 are at least partially retracted into one or more windings around the roller 1200.

[0091] Similar to the first example of this disclosure, the LED layer 21 has a first LED layer edge 21a, which is mounted or clamped in a groove 1210 existing in the outer circumference 1200a and extending in the elongated direction of the elongated roller 1200. The flexible single LED layer 21 is movable between a retracted position and an extended position. In the extended position, the flexible single LED layer 21 has an orientation in which it has an elongated dimension that is longer than its dimension in the retracted position.

[0092] Specifically, in the extended position, one or more windings of the flexible LED layer 21 are unwound from the roller 1200, such that the flexible individual LED layer 21 extends from the exit position 120-1' of the housing 1100, as shown. Figure 7b The cross-sectional view is shown. The exit position 120-1' can be configured as an exit opening extending along the length axis of the housing 1100. Figure 7a and 7b In this configuration, the exit opening is configured as a slit-like opening with an opening width (or height) approximately the same as the thickness of the flexible LED sheet 21, which allows the flexible LED sheet 21 to exit the housing 1100 as it is unwound from the roller 1100.

[0093] Similar to the examples depicted in Figures 3a and 3b, the flexible single LED layer 21 is also provided with a plurality of LED elements 210 for illuminating an optical layer 22, which may contain information for display. Figures 7a-7b In 7d, the optical layer 22 may be a flexible optical diffuser containing information for illumination by the LED layer 21 and for display. The optical layer 22 is mounted such that its free layer edge 22a is located at a first mounting position 120-2' on the outer circumference of the housing 1100 by a clamping mechanism or other type of mechanism (e.g., using a magnet).

[0094] At the extended position of the flexible LED layer 21, the first mounting position 120-2' differs from the exit position 120-1' of the flexible LED layer 21 through its extension. For example... Figure 7b As shown, the first mounting position 120-2' and the exit position 120-1' are located on opposite sides of the circumference of the housing 1100, for example, with an arc length of approximately 180°. Figure 7b As shown, the two layers 21-22 are spaced apart from each other by a distance d1. No additional spacing mechanism is required, and with this configuration, the extension length of the flexible LED layer 21 unwound from the roller 1200 can be adapted to match the length of the optical layer 22. Thus, optimal illumination of the information contained on the optical layer 22 can be achieved.

[0095] exist Figures 7a-7d In the middle, the slender roller 1200 has a cylindrical structure with a diameter and longitudinal dimension that are approximately similar to the longitudinal dimension of the housing 1100.

[0096] exist Figure 7c Chinese (combined) Figure 7d The figure depicts another example that is substantially similar to the examples in Figures 5a and 5b, but with an LED layer 21' and two diffuse optical layers 221 and 222. Figure 7c In (and 7d), an example of a retractable lighting device according to this disclosure is indicated by reference numeral 1000'. It also includes a housing 1100', which has end caps 110a-110b at its open housing end, as shown... Figure 7dAs shown. Furthermore, an elongated roller 1200, rotatable on a length axis 1200q, is housed within a housing 1100'. Flexible LED sheets 21' are partially retracted in a so-called retracted position into one or more windings located around the roller 1200, and are mounted or clamped such that their free layer edges 21a are located in grooves 1210 provided in the outer circumference of the elongated and rotatable roller 1200.

[0097] LED layer 21' is a so-called double-sided LED layer having two LED groups, each LED group comprising multiple LEDs 210-1 and 210-2, and each group of LEDs 210-1 / 210-2 disposed on either surface 21f1 or 21f2. Each layer 21f1-21f2 may optionally include electrical connections extending to each group of LEDs 210-1 / 210-2. In an alternative embodiment, electrical connections may be provided to LEDs separate from LED layer 21'.

[0098] Both sets of LEDs 210-1 / 210-2 of the double-sided LED layer 21' are positioned such that most of the light emitted from them is directed primarily toward each optical layer 221 and 222 facing either LED layer surface 21f1 or 21f2. Using this example, two diffuse optical layers 221 and 222 can be simultaneously displayed and illuminated using a single double-sided LED layer 21'.

[0099] Both diffuse optical layers 221 and 222 can contain different information to be simultaneously illuminated and displayed by the LED layer 21'. Both diffuse optical layers 221 and 222 are mounted such that their respective free first optical layer edges 22a1 and 22a2 are different from the first and second mounting positions 120-2' and 120-3', respectively. The first and second mounting positions 120-2' and 120-3' are both located on the outer circumference of the housing 1100' and are different from each other, as well as from the exit position 120-1' of the protruding double LED layer 21' from the housing 1100'. Therefore, different gaps or spaces d1-d2 are created between each diffuse optical layer 221 and 222 and the LED layer 21', and the illumination of the two optical layers 221 and 222 holding the double-sided LED layer 21' can thus be optimally adjusted by a single double-sided LED layer 21'.

[0100] Figures 7a-7b In the two examples 7d and 7c-7d, the roller 1200 can be made hollow (partial) to accommodate one or more LED drivers 123 to receive power and drive the (dual) LED layer 21 (21') based on the received power.

[0101] Figures 7a-7b The two examples, 7d and 7c-7d, can also be equipped with features such as those mentioned above. Figure 6 The light shielding device shown is designed to shield light emitted by the (dual) LED layers 21-21' to prevent light from passing through the spaces or gaps d1 and d2 between the (dual) LED layers 21 (21') and the optical layers 22 (221 and 222) (see [link]). Figures 7b-7c (Leave or leak out.)

[0102] In a manner similar to that disclosed with reference to the examples in Figures 4a-4c, optical layers 22 (221 and 222) may provide identification features indicated by useful reference numeral 22z at their free optical layer edges 22a (22a1-22a2) (see Figures 4b and 4c). The identification features provided at the optical layer edges may be barcodes (QR codes), perforated patterns, or RFID tags, and may identify the optical layer (e.g., based on optimal illumination settings of the optical layer). Similarly, sensing elements (not shown) may be disposed at housings 1100-1100', either positioned on the outer circumference of housings 1100-1100' and located at corresponding first mounting positions 120-2' and second mounting positions 120-3', or operating on the outer circumference of housings 1100-1100' and located in corresponding first mounting positions 120-2' and second mounting positions 120-3'.

[0103] These sensing elements can sense the recognition characteristics of the corresponding diffuse optical layers 22 (221 and 222), which are mounted such that their free layer edges 22a (22a1-22a2) are located at or near either mounting position 120-2' and 120-3'. Similar to the example described with respect to Figures 4a and 4b, the recognition characteristic 22z defines the optimal illumination setting for the associated optical layers 22 (221 and 222). The sensing elements can control the driver 123 in response to the sensed recognition characteristic 22z of the diffuse optical layers. For example, if the recognition characteristic 22z characterizes the optimal illumination setting for the associated optical layers 22 (221 and 222), the light output of the LED layer 21 (21') can be adjusted and thus optimally adjusted to the illumination of the optical layers 22 (221 and 222) mounted to the housings 1100-1100'.

Claims

1. A retractable lighting device, comprising: A long, slender drum that can rotate along its length axis; as well as A flexible multilayer illumination sheet movable between a retracted position and an extended position beyond the retracted position, wherein the multilayer illumination sheet is at least partially retracted into one or more windings around the roller in the retracted position, and wherein the multilayer illumination sheet is fully extended from the roller in the extended position; The multilayer illumination sheet includes at least one LED layer and at least one diffuse optical layer. The at least one LED layer has a first LED layer edge mounted at a first mounting position on the roller, and the at least one diffuse optical layer has a first optical layer edge mounted at a second mounting position on the roller. The first mounting position is positioned such that it is a distance of one arc length from the second mounting position along the outer circumference of the roller.

2. The retractable lighting fixture of claim 1, wherein, The central angle corresponding to the arc length between the first installation position and the second installation position is between 30° and 330°.

3. The retractable lighting device according to any one of the preceding claims, wherein the roller includes at least one additional mounting position different from the first mounting position and the second mounting position.

4. The retractable lighting fixture according to claim 1 or 2, wherein each installation position is positioned at an arc length equidistant from each other.

5. The retractable lighting device according to claim 1 or 2, wherein each of the first, second and additional mounting positions is configured as a first, second and additional recess, each recess being disposed in the outer circumference of the roller and configured to respectively accommodate one of the edges of the first LED layer and the first optical layer.

6. The retractable lighting device according to claim 4, wherein the multilayer lighting sheet comprises an LED layer and two diffuse optical layers, the LED layer being a double-sided LED layer sandwiched between the two diffuse optical layers.

7. The retractable lighting fixture of claim 2, wherein, The central angle corresponding to the arc length between the first installation position and the second installation position is between 45° and 315°.

8. The retractable lighting fixture of claim 2, wherein, The central angle corresponding to the arc length between the first installation position and the second installation position is between 90° and 270°.

9. The retractable lighting device according to claim 4, wherein the central angle corresponding to the equidistant arc lengths is 90° or 120°.

10. A retractable lighting device, comprising: case; An elongated roller, which is rotatable along its length axis and housed within the housing; as well as A flexible LED layer movable between a retracted position and an extended position beyond the retracted position, wherein the flexible LED layer is at least partially retracted into one or more windings around the roller in the retracted position, and wherein the flexible LED layer is unfolded from the roller and extended from the housing via a departure position in the extended position; as well as At least one diffuse optical layer having a first optical layer edge mounted at a first mounting position on the housing, the first mounting position being different from the exit position.

11. The scalable luminaire of claim 10, wherein, The exit position is configured as an exit opening extending along the length axis of the housing, and in particular as a slit-shaped exit opening.

12. The retractable lighting device of claim 10 or 11 further includes at least one driver housed in the roller, the at least one driver being arranged to receive power and drive the LED layer based on the received power.

13. The retractable lighting device of claim 12, wherein the at least one diffuse optical layer is disposed at the edge of the first optical layer and has identification characteristics, and a sensing element is disposed near at least one of the first, second, or other mounting locations, wherein when mounted at the first, second, or other mounting location, the sensing element is configured to sense the identification characteristics of the at least one diffuse optical layer.

14. The retractable lighting apparatus of claim 13, wherein the sensing element is configured to control the at least one driver in response to the identification characteristics of the sensed at least one diffuse optical layer.

15. The retractable lighting device according to claim 10 or 11, wherein the surface of the LED layer and the diffuse optical layer facing each other is configured to reflect visible light.

16. The retractable lighting device according to claim 10 or 11, wherein one or more counterweight elements are provided at the second LED layer edge of the LED layer and the second optical layer edge of the diffuse optical layer.

17. The retractable lighting apparatus of claim 10 further includes a light shielding device configured to shield light emitted by the LED layer to prevent light from leaving the flexible LED layer along its longitudinal side edge.

18. The retractable lighting apparatus of claim 17, wherein the light shielding device is mounted to the longitudinal side edge of the LED layer and extends along the longitudinal side edge of the LED layer.

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