WO2014194650A1 - Illumination device for refrigerator, and refrigerator - Google Patents

Abstract

Disclosed are an illumination device for a refrigerator, and a refrigerator. The illumination device for a refrigerator comprises a first light guide plate (1) and a second light guide plate (2) which are laminated on each other, with a scattering film (3) being arranged therebetween, wherein at least one side of the first light guide plate (1) is provided with a first light-emitting diode light strip (4), and the light emitted by the first light-emitting diode light strip (4) is incident to the first light guide plate (1). The surface of the light guide plate (1) away from the scattering film (3) is provided with a reflecting dot (5). The illumination device for a refrigerator has a small volume and occupies less space in the refrigerator.

Description

 Refrigerator lighting and refrigerator

Priority is claimed on Japanese Patent Application No. 20131021650, the entire disclosure of which is incorporated herein by reference.

[Technical Field]

The invention relates to lighting technology, in particular to a refrigerator lighting device and a refrigerator.

 【Background technique】

Light Emitting Diode (LED) has high luminous efficiency and long service life, and is widely used in various lighting devices. However, since LED is a point light source, it has certain limitations in large-area illumination. In the case of a certain number of LEDs, the combined illumination of a large-area illumination device has poor uniformity of illumination; if the number of LEDs is increased, the number of LEDs is increased. The density of the arrangement is increased to increase the uniformity, and the corresponding cost is also increased.

The illumination device with the LED as the light source can be applied to the backlight of the refrigerator. The acrylic plate is generally used as the light guide plate. The front and the back of the light guide plate are respectively provided with a scattering plate and a reflection plate, and the light guide plate and the reflection plate are respectively disposed. A plurality of LEDs, a part of the light emitted by the LED directly enters the light guide plate from the back side of the light guide plate, is refracted by the light guide plate, is emitted from the front surface of the light guide plate, and the other portion is reflected by the reflection plate and then incident on the light guide plate, and the scattering plate is opposite to the light guide plate. The light emitted from the light guide plate is scattered to improve the uniformity of the emitted light. In addition, a diffuser, a light guide plate, a reflector, and an LED are enclosed by a lampshade for improving the softness of the emitted light and having the effect of protecting each device.

Since the prior art adopts a multi-layer board structure composed of a light guide plate, a reflection plate and a diffusion plate, and a surrounding lamp cover, the size of the illumination device is large, and the illumination device is disposed in the refrigerator. Taking up a large space, the available space in the refrigerator is greatly reduced.

 [Summary of the Invention]

The invention provides a refrigerator lighting device and a refrigerator, which are used for solving the problem that the existing lighting device is bulky, and reducing the space occupied by the lighting device in the refrigerator.

An embodiment of the present invention provides a refrigerator lighting device including a first light guide plate and a second light guide plate, and a scattering film is disposed between the first light guide plate and the second light guide plate, and the first guide a first LED light bar is disposed on at least one side of the light panel, and the light emitted by the first LED light bar is incident on the first light guide plate;

Reflective dots are disposed on a surface of the first light guide plate remote from the scattering film.

The refrigerator lighting device as described above, further comprising a second LED light bar, wherein the second LED light bar is disposed on at least one side of the second light guide plate, and the light emitted by the second LED light bar Incident into the second light guide plate.

In the refrigerator lighting device as described above, an engraved pattern or a printed pattern is provided on a surface of the second light guide plate adjacent to the scattering film.

In the refrigerator lighting device as described above, a distribution density of the first light-emitting diode strips adjacent to the first light-emitting diode strips is smaller than a distribution density of the first light-emitting diode strips; and/or

The reflection intensity of the light-emitting grid adjacent to the first LED light strip is less than the reflection intensity away from the first LED strip.

In the refrigerator lighting device as described above, a reflective film is further provided on a surface of the first light guide plate on which the reflective mesh dots are disposed.

In the refrigerator lighting device as described above, the reflective mesh point is a bump or a pit.

In the refrigerator lighting device as described above, the engraving pattern or the printing pattern is identification information or prompt information.

In the refrigerator lighting device as described above, the first light guide plate and the second light guide plate are made of an acrylic plate.

The refrigerator lighting device as described above, further comprising a U-shaped frame, the attached first light guide plate and the second light guide plate, and the first light-emitting diode light bar and the second light-emitting diode light bar being assembled on the U In the U-shaped groove of the frame, the first LED light strip is disposed between the bottom of the U-shaped groove and the first light guide plate, and the second LED light bar is disposed at the bottom of the U-shaped groove Between the second light guide plate.

The embodiment of the present invention further provides a refrigerator lighting device, including a first light guide plate and a light cover having a scattering function, wherein at least one side of the first light guide plate is provided with a first light emitting diode light bar, and the first light emitting diode Light emitted by the light bar is incident into the first light guide plate;

The lampshade is disposed outside the first light guide plate and the first light emitting diode light bar;

Reflective dots are disposed on a surface of the first light guide plate remote from the lamp cover.

In the refrigerator lighting device as described above, a distribution density of the first light-emitting diode strips adjacent to the first light-emitting diode strips is smaller than a distribution density of the first light-emitting diode strips; and/or

The reflection intensity of the light-emitting grid adjacent to the first LED light strip is less than the reflection intensity away from the first LED strip.

The refrigerator lighting device as described above, further comprising a U-shaped frame, the first light guide plate and the first light-emitting diode light strip being assembled in a U-shaped groove of the U-shaped frame, the first light-emitting diode The light bar is disposed between the bottom of the U-shaped groove and the first light guide plate, and the U-shaped frame is disposed inside the light cover or matched with the light cover.

An embodiment of the present invention provides a refrigerator, which adopts the refrigerator lighting device as described above;

The refrigerator lighting device is disposed on a backboard of the refrigerator.

An embodiment of the present invention provides a refrigerator lighting device, by using a laminated first light guide plate and a second light guide plate, a scattering film is disposed between the first light guide plate and the second light guide plate, at least one of the first light guide plates a first LED light bar is disposed on the side, the light emitted by the first LED light bar is incident on the first light guide plate, and a reflective mesh point is disposed on the surface of the first light guide plate away from the scattering film, which can solve the existing The problem that the lighting device takes up a large space reduces the occupation of the internal space of the refrigerator by reducing the volume of the lighting device of the refrigerator.

 [Description of the Drawings]

1 is a schematic structural view of a refrigerator lighting device according to Embodiment 1 of the present invention;

2 is another schematic structural diagram of a refrigerator lighting device according to Embodiment 1 of the present invention;

3 is a perspective view of a refrigerator lighting device according to Embodiment 1 of the present invention;

4 is a schematic diagram showing a distribution structure of reflective net dots in a refrigerator lighting device according to Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of a refrigerator lighting device according to Embodiment 2 of the present invention; FIG.

FIG. 6 is another schematic structural diagram of a refrigerator lighting device according to Embodiment 2 of the present invention.

 【detailed description】

Example 1

FIG. 1 is a schematic structural diagram of a refrigerator lighting device according to Embodiment 1 of the present invention. As shown in FIG. 1, the refrigerator lighting device may include a first light guide plate 1 and a second light guide plate 2, and a scattering film 3 is disposed between the first light guide plate 1 and the second light guide plate 2, and the first light guide plate is disposed. The first light-emitting diode strip 4 is disposed on at least one side of the first light-emitting diode strip 4, and the light emitted by the first light-emitting diode strip 4 is incident on the first light guide plate 1. A reflective mesh dot 5 is disposed on a surface of the first light guiding plate 1 remote from the scattering film 3. From the perspective of FIG. 1, the first light guide plate 1, the scattering film 3, and the second light guide plate 2 are sequentially arranged from bottom to top, and the lower surface of the first light guide plate 1 is provided with a reflective mesh dot 5.

The first light guide plate 1 and the second light guide plate 2 may be transparent plates with good light guiding properties, such as an optical grade acrylic plate or a polycarbonate plate. In this embodiment, a transparent acrylic plate is preferably used. The surface area of the two light guide plates can be set according to the volume of the refrigerator. The thickness of the light guide plate can be specifically set according to the distribution density of the reflective mesh points 5, and the thickness of the light guide plate is minimized under the premise of satisfying the uniform distribution of the light. The occupation of the internal space of the refrigerator is reduced. For example, the thickness of the first light guide plate 1 may be between (2-3) mm, and the thickness of the second light guide plate 2 may be between (1.5-3) mm. The light emitted by the first LED strip 4 enters the first light guide plate 1 at different incident angles, and some of the light is refracted by the first light guide plate 1 and directly emitted from the surface adjacent to the scattering film 3 to reach the scattering film 3, and another portion of the light After being reflected by the reflective mesh point 5, the first light guide plate 1 is again entered, and then the first light guide plate 1 is emitted to reach the scattering film 3. The scattering film 3 is capable of scattering the light emitted from the first light guide plate 1 so that the light is diverged in various directions for improving the uniformity of the light. The second light guide plate 2 absorbs the light emitted from the scattering film 3, further diffuses the direction in which the light is emitted, and functions as a protective layer for the scattering film. The thickness of the scattering film 3 may be (1-2) mm, preferably 1.5 mm.

The printing process of the reflective dot 5 can be printed on the surface of the first light guiding plate 1 away from the scattering film 3 by using a material having a very high reflectivity and not absorbing light, which is commonly used by those skilled in the art, to obtain a reflective dot 5, which is Bump. Alternatively, the groove may be engraved on the surface of the first light guide plate 1 away from the scattering film 3, and then the material having extremely high reflectivity and no light absorption is filled into the groove mark to form the reflective mesh point 5, and the reflection is performed. Dot 5 can be considered a pit. Of course, the reflective dot 5 can also be printed using other methods well known to those skilled in the art. In this embodiment, the method of printing the reflective mesh point 5 is adopted, that is, the reflective mesh dot 5 protrudes from the surface of the first light guide plate 1. When the light hits each reflective mesh point 5, the outgoing light of each reflective mesh point 5 is emitted to multiple angles. . The reflective mesh point 5 can reflect the light emitted from the first light guide plate 1 and enter the first light guide plate 1, thereby improving the light utilization efficiency.

The first LED light bar 4 may include a plurality of light emitting diodes arranged in a strip shape, which may be one or more, and the length is matched with the first light guide plate 1. The power input of the first LED light bar 4 is input from the refrigerator. The control panel provides that it can be illuminated when the refrigerator door is opened, and stops when the refrigerator door is closed to save power and energy. The first LED strips 4 may be disposed on one side of the first light guide plate 1 , or may be disposed on opposite sides of the first light guide plate 1 or on the four sides of the first light guide plate 1 , specifically Set according to the desired brightness.

In this embodiment, the first light-emitting diode strip 4 is disposed on one side of the first light guide plate 1 as an example to specifically describe the working principle of the refrigerator lighting device: the light emitted by the first LED strip 4 enters the first angle at different incident angles. A light guide plate 1 is defined by a light incident perpendicularly, and a portion of the light having an incident point at the upper portion of the boundary is refracted by the first light guide plate 1 and directly emitted from the surface adjacent to the scattering film 3 to reach the scattering film 3, and the incident point is at a lower limit. Another portion of the light is reflected by the reflective mesh point 5, enters the first light guide plate 1 again, and then exits the first light guide plate 1 to reach the scattering film 3. The scattering film 3 scatters the light emitted from the first light guide plate 1 so that the light is further diverged in various directions and then incident on the second light guide plate 2. The second light guide plate 2 diverges the light emitted from the scattering film 3 again.

The technical solution of the embodiment provides a first film and a second light guide plate, and a scattering film is disposed between the first light guide plate and the second light guide plate, and the first light guide plate is disposed on at least one side of the first light guide plate. The LED light bar, and the surface of the first light guide plate disposed away from the scattering film is provided with a reflective mesh point, which can solve the problem that the existing lighting device occupies a large space, and reduces the volume of the refrigerator lighting device by reducing the volume of the refrigerator lighting device. The occupation of the internal space of the refrigerator.

Preferably, the surface of the second light guide plate 2 adjacent to the scattering film 3 may be provided with an engraved pattern or a printed pattern. Specifically, a groove or a plurality of pits may be engraved on the second light guide plate 2 when the scattering film is used. 3 The emitted light is reflected or refracted on the groove or the pit, and the direction of propagation of the light changes, so that the brightness of the portion of the light that exits the second light guide plate 2 is different from other regions without the engraved pattern, so the engraving can be performed. The pattern is highlighted. Alternatively, a pattern may be printed on the second light guide plate 2, and the printed pattern may be printed on the second light guide plate 2 with a light blocking material. The engraving pattern or the printing pattern may be identification information or prompt information, and may specifically be text or an artistically effective picture composed of lines. If it is text, it can be used to identify some basic parameters of the refrigerator, such as model, capacity, rated voltage, rated power or other parameters, or some tips, such as the use of refrigerators, etc., can improve the traditional The basic parameters of the refrigerator are attached to the outer surface to affect the aesthetics. If it is an artistically effective picture, it can enhance the artistic effect of the lighting device and improve the comfort of the refrigerator.

2 is a schematic view showing another structure of a refrigerator lighting device according to Embodiment 1 of the present invention, and FIG. 3 is a perspective view of a refrigerator lighting device according to Embodiment 1 of the present invention. As shown in FIG. 2 and FIG. 3 , on the basis of the above technical solution, the refrigerator lighting device may further include a second LED strip 6 , and the second LED strip 6 is disposed on at least one side of the second light guide 2 . The light emitted from the second LED strip 6 is incident on the second light guide plate 2 for improving the brightness. That is, the second LED strips 6 may be disposed on the four sides of the second light guide plate 2, or may be disposed on opposite sides, or may be disposed on only one side. Optionally, the first LED strip 4 and the second LED strip 6 are disposed on the same side, and the two strips are arranged in two rows according to actual needs, and are disposed on a printed circuit board (Printed Circuit Board, referred to as PCB). The arrangement manner of the first LED strip 4 and the second LED strip 6 can be specifically set according to the size of the two light guide plates. If the size of the light guide plate is large, a plurality of light strips can be disposed to improve the brightness. And uniformity. In addition, it can be understood by those skilled in the art that if the second light guide plate 2 is provided with a printed pattern, the second light-emitting diode light strip 6 may not be disposed, and only the first light-emitting diode light strip 4 is used, and the brightness thereof is sufficient for the illumination. The need for, and can display a printed pattern, if the second light guide plate 2 is provided with an engraving pattern, a second LED light bar 6 can be provided for enhancing the brightness of the light to better meet the needs of illumination, and Highlight the engraving pattern.

The illuminating device may further include a U-shaped frame 8 for assembling the first light guide plate 1 and the second light guide plate 2 in the U-shaped groove of the U-shaped frame 8 for fixing the two light guide plates on the one hand, and on the other hand, The first LED light bar 4 and/or the second LED light bar 6 can also be assembled in a U-shaped groove, and the first LED light bar 4 is disposed between the bottom of the U-shaped groove and the first light guide plate 1 The two LED strips 6 are disposed between the bottom of the U-shaped groove and the second light guide plate 2. Specifically, the first LED strip 4 and the second LED strip 6 may be fixed on one PCB, or may be respectively fixed on two PCBs, and fixedly disposed in the U-shaped slot by sticking, clamping or bolting. The light bar emits light toward the corresponding light guide plate. The U-shaped frame 8 can be disposed on at least one side of the light guide plate, and specifically can be matched with the light-emitting diode light strip to fix the LED light strip and the light guide plate. The U-shaped groove can be fixedly mounted on the back plate of the refrigerator by bolt connection.

Preferably, the distribution density of the first light-emitting diode strips 4 adjacent to the first light-emitting diode strips 4 is smaller than the distribution density away from the first light-emitting diode strips 4, and/or the reflection of the first LED strips 4 The intensity is less than the intensity of the reflection away from the first light-emitting diode strip 4. As shown in FIG. 4, FIG. 4 is a schematic diagram showing a distribution of reflective mesh points in a refrigerator lighting device according to Embodiment 1 of the present invention, which is a top view of FIG. 1, and a first LED light bar 4 is disposed from the left side of the first light guide plate 1. At the incident, the distribution density of the reflective mesh dots 5 adjacent to the first LED strip 4 is small, and the distribution density of the reflective mesh dots 5 away from the first LED strip 4 is large. In addition, the reflection intensity on the left side of the reflective mesh point 5 may be smaller than the reflection intensity on the right side, and the area of the reflective mesh point 5 on the left side may be smaller, and the area of the reflective mesh point 5 on the right side is larger, and different reflections may be selected. The strength of the material is made into the reflective mesh point 5, or by adjusting the bump height or the pit depth of the reflective mesh point 5. Since the light emitted by the first LED strip 4 enters the first light guide plate 1, energy loss occurs during the propagation of the first light guide plate 1, that is, the light energy adjacent to the first LED strip 4 Stronger, the light energy away from the first LED strip 4 is weak. In the region where the light energy is strong, the distribution density and/or the reflection intensity of the reflective mesh point 5 is smaller than the region where the light energy is weak, so that the light reaching the human eye is uniform. In addition, the distribution of the reflective mesh points 5 may be set to a misalignment distribution, a group distribution, a ring distribution, a fan distribution or other distribution methods commonly used in the prior art, and the shape of the reflective mesh dots 5 may be set to a circle, a polygon, and other shapes, specifically It is set by the person skilled in the art, which is not limited in this embodiment.

Another preferred solution is that a reflective film 7 is further provided on the surface of the first light guide plate 1 on which the reflective mesh dots 5 are provided to enhance the reflective performance. The reflective film 7 may have a thickness of (0.1-0.2) mm. The reflective film 7 can be applied to the surface of the first light guide plate 1 by using a reflective film commonly used in the prior art, and the reflective mesh dot 5 is coated between the reflective film 7 and the first light guide plate 1 for illumination. The device provides a clean background and enhances the reflection of light, further reducing light loss and improving light utilization. At the same time, the reflective film 7 can also protect the reflective mesh point 5, reduce wear and prolong the service life of the lighting device. If the first light guide plate 1, the second light guide plate 2, the scattering film 3, and the reflective film 7 provided by the above embodiments are used to constitute a refrigerator lighting device, the thickness of the refrigerator lighting device does not exceed 8 mm, which greatly reduces the interior of the refrigerator. The occupation of space.

Example 2

FIG. 5 is a schematic structural diagram of a refrigerator lighting device according to Embodiment 2 of the present invention, and FIG. 6 is another schematic structural diagram of a refrigerator lighting device according to Embodiment 2 of the present invention. As shown in FIG. 5 and FIG. 6 , on the basis of the above technical solution, the refrigerator lighting device includes a first light guide plate 1 and a light cover 9 having a scattering function, and the first light guide plate 1 is provided with a first light emission on at least one side surface thereof. The diode light bar 4, the light emitted by the first light-emitting diode light bar 4 is incident on the first light guide plate 1. The lampshade 9 may be made of a material having a scattering function, or may be coated with a scattering material on the surface of the lampshade 9 adjacent to the first light guiding plate 1, so that the light emitted from the first light guiding plate 1 can be scattered. The lamp cover 9 is disposed outside the first light guide plate 1 and the first LED strip 4 to protect the first light guide plate 1 and the first LED strip 4 . Further, a reflective mesh dot 5 is provided on the surface of the first light guiding plate 1 remote from the lamp cover 9.

For the manner of setting the reflective network dots disposed on the first light guide plate 1, refer to the above embodiments, and details are not described herein again.

The U-shaped frame 8 may be disposed inside the lamp cover 9, or may be matched with the lamp cover 9, and the first light guide plate 1 and the first light-emitting diode light bar 4 are enclosed inside to reduce the volume of the refrigerator lighting device.

The above technical solution adopts a lamp cover with a scattering function instead of the second light guide plate and the scattering film of the above embodiment, and the illumination device is arranged as a whole. In addition to the beneficial effects of the above embodiments, the refrigerator illumination can be further reduced. The size of the device, and the ability to protect the various devices inside the lighting device, and easier to handle and install.

The embodiment of the present invention further provides a refrigerator, which can adopt the refrigerator lighting device used in the above embodiment, the refrigerator lighting device is disposed on the backboard of the refrigerator, and the power source of each light-emitting diode light bar in the lighting device can be provided by the refrigerator. The control panel comes with it. The use of the above-described refrigerator lighting device can reduce the occupation of the internal space of the refrigerator and can improve the aesthetics of the interior of the refrigerator.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims (13)

1. A refrigerator lighting device includes a first light guide plate and a second light guide plate, and a scattering film is disposed between the first light guide plate and the second light guide plate, and the first light guide plate is disposed a first LED light bar is disposed on at least one side thereof, and light emitted by the first LED light bar is incident into the first light guide plate;

   Reflective dots are disposed on a surface of the first light guide plate remote from the scattering film.
2. The refrigerator lighting device according to claim 1, further comprising a second LED light bar, wherein the second LED light bar is disposed on at least one side of the second light guide plate, the second Light emitted from the LED strip is incident on the second light guide.
3. The refrigerator lighting device according to claim 1 or 2, wherein an engraved pattern or a printed pattern is provided on a surface of the second light guide plate adjacent to the scattering film.
4. The refrigerator lighting device according to claim 3, wherein a distribution density of the light-emitting grid points adjacent to the first light-emitting diode light strip is smaller than a distribution density of the light-emitting diode strips away from the first light-emitting diode; and / or

   The reflection intensity of the light-emitting grid adjacent to the first LED light strip is less than the reflection intensity away from the first LED strip.
5. The refrigerator lighting device according to claim 4, wherein a reflective film is further disposed on the surface of the first light guide plate on which the reflective mesh dots are disposed.
6.  The refrigerator lighting device according to claim 5, wherein the reflective mesh dots are bumps or pits.
7. The refrigerator lighting device according to claim 6, wherein the engraving pattern or the printing pattern is identification information or prompt information.
8. The refrigerator lighting device according to claim 7, wherein the first light guide plate and the second light guide plate are made of an acrylic plate.
9. The refrigerator lighting device according to claim 2, further comprising a U-shaped frame, the attached first light guide plate and the second light guide plate, and the first light-emitting diode light bar and the second light-emitting diode The light bar is disposed in the U-shaped groove of the U-shaped frame, the first LED light bar is disposed between the bottom of the U-shaped groove and the first light guide plate, and the second LED light bar is disposed Between the bottom of the U-shaped groove and the second light guide plate.
10. A refrigerator lighting device, comprising: a first light guide plate and a lamp cover having a scattering function; at least one side of the first light guide plate is provided with a first light-emitting diode light bar, the first light-emitting diode light bar The emitted light is incident into the first light guide plate;

    The lampshade is disposed outside the first light guide plate and the first light emitting diode light bar;

    Reflective dots are disposed on a surface of the first light guide plate remote from the lamp cover.
11. The refrigerator lighting device according to claim 10, wherein a distribution density of the light-emitting grid points adjacent to the first light-emitting diode light strip is smaller than a distribution density of the light-emitting diode strips away from the first light-emitting diode; and / or

    The reflection intensity of the light-emitting grid adjacent to the first LED light strip is less than the reflection intensity away from the first LED strip.
12. The refrigerator lighting device according to claim 10 or 11, further comprising a U-shaped frame, wherein the first light guide plate and the first light-emitting diode light strip are assembled in a U-shaped groove of the U-shaped frame The first LED light strip is disposed between the bottom of the U-shaped groove and the first light guide plate, and the U-shaped frame is disposed inside the light cover or matched with the light cover.
13. A refrigerator characterized by using the refrigerator lighting device according to any one of claims 1 to 12;

    The refrigerator lighting device is disposed on a backboard of the refrigerator.

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