TWI479108B - Light-emitting device for adjusting color temperature - Google Patents

Description

Light-emitting device capable of adjusting color temperature

The present invention relates to a light-emitting device, and more particularly to a light-emitting device that can adjust color temperature.

The color temperature of the conventional illuminating device is fixed. When the light of different color temperatures is to be obtained, only another illuminating device that meets the expected color temperature can be replaced, resulting in the need to redesign the illuminating device or derive additional procurement expenses.

The present invention relates to a light-emitting device that can adjust the color temperature of light.

According to an embodiment of the invention, a light-emitting device capable of adjusting color temperature is provided, which comprises a substrate, a light source, a flexible fluorescent sheet and a telescopic mechanism. The light source is disposed on the substrate to emit a light. The telescopic mechanism protrudes from the substrate and is connected to the intermediate portion of the flexible fluorescent sheet, and the opening angle and the condensation of the telescopic mechanism change the opening angle of the flexible fluorescent sheet to adjust the flexible fluorescent sheet. The color temperature of the light that emits light.

In order to provide a better understanding of the above and other aspects of the present invention, the following detailed description of the embodiments and the accompanying drawings

Please refer to FIG. 1A, which shows an external view of a light-emitting device with adjustable color temperature according to an embodiment of the invention. Light-emitting device 100 capable of adjusting color temperature The substrate 110, the flexible fluorescent sheet 120, the telescopic mechanism 130, and at least one light source 140 are included.

By the stretching and condensation of the telescopic mechanism 130, the opening angle A1 of the flexible fluorescent sheet 120 can be changed to adjust the color temperature of the light emitted through the flexible fluorescent sheet 120. The detailed structure of the light-emitting device 100 capable of adjusting the color temperature is further described below.

Referring to Fig. 1B, a cross-sectional view taken along line 1B-1B' in Fig. 1A is shown. The flexible fluorescent sheet 120 includes a plurality of sub-fluorescent sheets 121, and each of the sub-fluorescent sheets 121 has a ring shape (Fig. 1A). The adjacent two sub-fluorescent sheets 121 are flexibly connected. For example, the thickness of the flexible fluorescent sheet 120 may be between 0.05 mm (mm) and 0.15 mm, so that the flexible fluorescent sheet 120 has flexibility. In this design, the sub-fluorescent sheets 121 can be integrally formed; or, although not shown, the adjacent two sub-fluorescent sheets 121 can be pivotally connected by a cylindrical joint, a ball joint or other suitable joints. The flexible fluorescent sheet 120 is flexible. During the stretching and condensation of the telescopic mechanism 130, the angle A2 of the adjacent two sub-fluorescent sheets 121 may vary between 30 and 170 degrees.

The adjacent two sub-fluorescent sheets 121 are respectively doped with phosphors of different colors. For example, the sub-fluorescent sheet 121' is doped with red phosphor powder, and the sub-fluorescent sheet 121" is doped with yellow phosphor powder. Due to the unfolding angle of the flexible fluorescent sheet 120 of FIG. 1B, the passer is made The illuminating sheet 121' has less light, and the sub-fluorescent sheet 121" has more light, thereby changing the color temperature of the light. In one embodiment, the sub-fluorescent sheet 121" is doped with yellow phosphor powder, and the blue light passes through a large amount of light, and the light emitted from the flexible fluorescent sheet 120 is a high color temperature.

In addition, the material of the flexible fluorescent sheet 120 includes polymethylmethacrylate (PMMA) or polycarbonate. (Polycarbonate, PC).

The telescopic mechanism 130 protrudes from the substrate 110 and is connected to the intermediate portion of the flexible fluorescent sheet 120. The expansion angle and the condensation of the expansion and contraction mechanism 130 change the opening angle A1 of the flexible fluorescent sheet 120 to be adjusted. The color temperature of the light emitted by the flexible fluorescent sheet 120. The expansion angle A1 of the flexible fluorescent sheet 120 is changed between 10 degrees and 350 degrees by the expansion and contraction mechanism 130.

The telescopic mechanism 130 includes a main support frame 131, a plurality of first sub-support frames 132, and a plurality of second sub-support frames 133. The main support frame 131 protrudes from the upper surface 110u of the substrate 110. The main support frame 131 is screwed to the substrate 110, so that the substrate 110 can be adjusted up and down relative to the main support frame 131, thereby changing the color temperature of the light. In another example, the main support frame 131 can also be permanently fixed to the substrate 110.

The first auxiliary support frame 132 is located at the upper end of the main support frame 131 and is used for the flexible fluorescent sheet 120 to be laid thereon. The second sub-support frame 133 can drive the first sub-support frame 132 to change the angle, thereby driving the flexible fluorescent sheet 120 laid thereon to change its opening angle A1.

Each of the second sub-supports 133 has a first end 133e1 and a second end 133e2. The first end 133e1 is slidably coupled to the main support frame 131, and each of the second ends 133e2 is pivotally connected to the corresponding first sub-support. Rack 132. In this example, the main support frame 131 has at least one sliding slot 1311 extending along the long axis direction of the main support frame 131, and the first end 133e1 of the second auxiliary support frame 133 is slid in the sliding slot 1311.

The telescopic mechanism 130 further includes an adjuster 134 and at least one elastic element 135, wherein the adjuster 134 is located below the substrate 110, and each second sub-support frame The first end 133e1 of the 133 is coupled to the adjuster 134. The adjuster 134 includes a protrusion 1341 and a pull handle 1342. The protrusion 1341 is movably disposed in the main support frame 131 and connected to the first end 133e1 of the second auxiliary support frame 133, and the pull handle 1342 is exposed on the main support frame. Outside the 131, and connected to the protrusion 1341. By operating the pull handle 1342, the telescoping mechanism 130 can be driven to stretch and condense.

One end 135e1 of the elastic member 135 is connected to the second sub-support frame 133 or the adjuster 134. This embodiment is exemplified by the protrusion 1341 of the connection adjuster 134. The other end 135e2 of the elastic member 135 is fixed to the main support frame 131, such as to the inner wall of the main support frame 131. The elastic member 135 is attached to a free length at the deployment angle of the flexible fluorescent sheet 120 of Fig. 1B, and the elastic member 135 is deformed from the state of Fig. 1B to store an elastic potential energy. In another example, the length of the elastic member 135 can be set to a free length at the deployment angle of the flexible fluorescent sheet 120 of Fig. 2 or 3 (described later). Further, the elastic member 135 can be a spring or a stretch strip.

During the adjustment of the angle A1 of the flexible fluorescent sheet 120 by the adjuster 134, the adjuster 134 drives the second auxiliary support frame 133 to move, and the elastic member 135 (connected to the protrusion 1341 of the adjuster 134) is deformed to store elasticity. Potential energy. When the adjuster 134 releases the length of the elastic member 135, the elastic position can be released to drive the telescoping mechanism 130 to retract, returning the flexible fluorescent sheet 120 to the unfolding angle of FIG. 1B.

Referring to FIG. 2, an external view of the flexible fluorescent sheet of the light-emitting device with adjustable color temperature of FIG. 1A is shown. By pushing up the position of the adjuster 134 to the second figure of FIG. 1A, the second sub-support frame 133 can be driven to push the first sub-support frame 132, thereby driving the flexible fluorescent sheet 120 to expand to the second stage. The state shown in the figure, where the main support The angle A1 of the flexible fluorescent sheet 120 on both sides of the frame 131 is substantially 180 degrees, but may be less than or greater than 180 degrees.

In one embodiment, the main support frame 131 has a constant hole 1312. The adjuster 134 further includes a latch 150 that can fix the slot 1343 of the protrusion 1341 of the adjuster 134 via the through hole 1312, thereby fixing the adjuster 134. The elastic position of the elastic member 135 is prevented from being released and the flexible fluorescent sheet 120 is pulled back to the unfolding angle of FIG. 1B.

In this example, since the light-expanding angle A1 of the flexible fluorescent sheet 120 of FIG. 2 is such that the light passing through the sub-fluorescent sheet 121' and the amount of light passing through the sub-fluorescent sheet 121" are substantially the same, a desired color temperature can be obtained. The color light of 3300K to 5300K, such as cool white light, can be obtained by adjusting the type and ratio of the phosphor powder of the sub-fluorescent sheet 121.

Please refer to FIG. 3, which is a perspective view showing the conversion of the flexible fluorescent sheet of the light-emitting device with adjustable color temperature of FIG. 2 to another expansion angle. By pushing up the position of the adjuster 134 to the third figure of FIG. 2, the second sub-support frame 133 can be driven to push the first sub-support frame 132, thereby driving the flexible fluorescent sheet 120 to expand to the third position. In the state shown in the figure, the angle A1 of the flexible fluorescent sheet 120 on both sides of the main support frame 131 exceeds 180 degrees.

In this example, since the expansion angle A1 of the flexible fluorescent sheet 120 of FIG. 2 causes less light passing through the sub-fluorescent sheet 121", the light passing through the sub-fluorescent sheet 121' is more, thereby changing Light color temperature.

In addition, the light source 140 is, for example, a blue light emitting diode or an ultraviolet light emitting diode disposed on the substrate 110 for emitting light through the flexible fluorescent sheet 120. The type of the light source 140 is not limited by the embodiment, and the light color of the light can be matched with the wavelength conversion characteristic of the flexible fluorescent sheet 120 to obtain The desired color of light, such as white light or other colored light. In this example, a plurality of light sources 140 surround the main support frame 131 of the telescopic mechanism 130.

Referring to FIG. 4, a cross-sectional view of a flexible fluorescent sheet of a light-emitting device with adjustable color temperature according to another embodiment of the present invention is shown. The flexible fluorescent sheet 220 includes a transparent sheet 223 and a fluorescent sheet 224, wherein the material of the transparent sheet 223 includes polymethyl methacrylate or polycarbonate, and the fluorescent sheet 224 covers the outer surface 223s of the transparent sheet 223. The wavelength conversion characteristic of the fluorescent sheet 224 can be similar to that of the flexible fluorescent sheet 120.

In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Lighting device with adjustable color temperature

110‧‧‧Substrate

120, 220‧‧‧Flexible Fluorescent

121‧‧‧Sub-fluorescent film

130‧‧‧Flexing mechanism

131‧‧‧Main support frame

1311‧‧ ‧ chute

1312‧‧‧through hole

132‧‧‧First support frame

133‧‧‧Second auxiliary support

133e1‧‧‧ first end

133e2‧‧‧ second end

134‧‧‧ adjuster

1341‧‧‧Pole

1342‧‧‧拉把

1343‧‧‧ card slot

135‧‧‧Flexible components

135e1‧‧‧ one end

135e2‧‧‧The other end

140‧‧‧Light source

150‧‧‧Carmen

223‧‧‧Transparent film

224‧‧‧Fluorescent film

223s‧‧‧ outer surface

A1‧‧‧open angle

A2‧‧‧ angle

1B-1B’‧‧‧Section direction

FIG. 1A is a perspective view of a light-emitting device with adjustable color temperature according to an embodiment of the invention.

Fig. 1B is a cross-sectional view taken along line 1B-1B' in Fig. 1A.

Fig. 2 is a perspective view showing the conversion of the flexible fluorescent sheet of the light-emitting device of the adjustable color temperature of Fig. 1A to another development angle.

Fig. 3 is a perspective view showing the conversion of the flexible fluorescent sheet of the light-emitting device of the adjustable color temperature of Fig. 2 to another expansion angle.

4 is a cross-sectional view showing a flexible fluorescent sheet of a light-emitting device with adjustable color temperature according to another embodiment of the present invention.

100‧‧‧Lighting device with adjustable color temperature

110‧‧‧Substrate

120‧‧‧Flexible Fluorescent

130‧‧‧Flexing mechanism

140‧‧‧Light source

A1‧‧‧open angle

1B-1B’‧‧‧Section direction

Claims (12)

An illumination device capable of adjusting a color temperature, comprising: a substrate; a light source disposed on the substrate for emitting a light; a flexible fluorescent sheet; and a telescopic mechanism protruding from the substrate and connected to the substrate In the middle portion of the flexible fluorescent sheet, the opening angle of the flexible fluorescent sheet is changed by the stretching and condensation of the stretching mechanism to adjust the color temperature of the light emitted through the flexible fluorescent sheet . The illuminating device of claim 1, comprising: a plurality of the light sources surrounding the telescopic mechanism. The illuminating device of claim 1, wherein the light source is a blue light emitting diode or an ultraviolet light emitting diode. The illuminating device of claim 1, wherein the telescopic mechanism comprises: a main support frame protruding from the substrate; a plurality of first sub-support frames at an upper end of the main support frame for a flexible fluorescent sheet is disposed thereon; and a plurality of second auxiliary supports each having a first end and a second end, each of the first ends being slidably coupled to the main A support frame, and each of the second ends is pivotally connected to the corresponding first sub-support frame. The illuminating device of claim 4, wherein the main support frame is screwed to the substrate to adjust the substrate relative to the main support frame. The illuminating device of claim 4, wherein the telescopic mechanism further comprises: an adjuster located below the substrate, the first end of each of the second sub-support frames being connected to the adjuster; and an elastic An element, one end of the elastic element is connected to the second auxiliary support or the adjuster, and the other end of the elastic element is fixed to the main support frame; wherein the adjuster adjusts the angle of the flexible fluorescent piece During the process, the elastic member deforms to store an elastic potential energy. The illuminating device of claim 6, wherein the elastic member is a spring or a stretch strip. The illuminating device of claim 1, wherein the flexible fluorescent sheet comprises: a plurality of sub-fluorescent sheets, the adjacent two sub-fluorescent sheets are flexibly connected, and the stretching of the telescopic mechanism And during the condensation process, the angle between adjacent two of the sub-fluorescent sheets varies between 30 and 170 degrees. The illuminating device of claim 8, wherein the adjacent two sub-fluorescent sheets are respectively doped with phosphors of different colors. The illuminating device of claim 1, wherein the flexible luminescent sheet comprises: a transparent sheet; and a luminescent sheet covering the outer surface of the transparent sheet. The illuminating device of claim 1, wherein the material of the flexible luminescent sheet comprises polymethylmethacrylate (PMMA) or polycarbonate (PC). The illuminating device of claim 1, wherein the flexible luminescent sheet has a thickness of between 0.05 mm and 0.15 mm.