Double-layer light source

Abstract

The utility model relates to a double-layer surface light source, which comprises a light guide plate, an appearance layer, a first light-emitting part and a backlight assembly, and is characterized in that the light guide plate comprises a light-emitting surface and a back surface opposite to the light-emitting surface; the appearance layer covers the light-emitting surface of the light guide plate; the first light-emitting part is installed on at least one side edge of the light guide plate. The backlight assembly includes: a backlight plate mounted on a back surface of the light guide plate; the number of the second light-emitting parts is at least one, each group of the second light-emitting parts is arranged and fixed on the mounting plate along a respective preset track, and each group of the second light-emitting parts is arranged towards the light guide layer. According to the utility model, the basic lighting function is provided through the light of the first light-emitting part, and meanwhile, the backlight assembly is arranged on the back surface of the light guide plate, so that corresponding patterns printed on the appearance layer are lighted in a targeted manner, the design of double-layer light sources is formed, and the lighting effect with layering sense and diversity is provided; and the pursuit of the market on illumination science and technology in the refrigeration equipment is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lighting technical field, especially relate to a double layer surface light source. BACKGROUND

[0002] In the prior art, a single LED light source is commonly used as internal illumination in refrigerators and freezers, which can provide basic illumination effect to a certain extent, but it can only change the effect of cool and warm light by adjusting the color temperature, and there is obvious limitation in visual performance and use experience.

[0003] With the continuous improvement of consumers' aesthetic requirements for home appliances, the market demand for refrigerator and freezer products with more technological light is increasing, and when users want to achieve more cool light effects through surface light sources or the light can be linked with other intelligent functions of the refrigerator and freezer, the traditional single light source design has been difficult to meet the needs of users. INVENTION CONTENTS

[0004] The utility model discloses a double layer surface light source, which is designed by setting a first light emitting part and a backlight assembly to form a double layer light source, and provides an illumination effect with gradation and diversity, thereby meeting the market demand for illumination technology in refrigeration equipment.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A double layer surface light source, characterized in that it comprises:

[0007] A light guide plate comprising a light emitting surface, a back surface opposite to the light emitting surface, and four side edges;

[0008] An appearance layer covering the light emitting surface of the light guide plate;

[0009] A first light emitting part installed on at least one side edge of the light guide plate;

[0010] A backlight assembly, which comprises:

[0011] A backlight plate installed on the back surface of the light guide plate;

[0012] A second light emitting part comprising at least one group, each group of the second light emitting part is arranged and fixed on the mounting plate along a predetermined track, and each group of the second light emitting part is arranged towards the light guide layer, so that the light emitted by the second light emitting part illuminates the appearance layer through the diffusion layer.

[0013] In some embodiments of the utility model, the backlight assembly further comprises a first bracket, which is arranged between the backlight plate and the light guide layer, and the first bracket has a first light transmission hole corresponding to the second light emitting part on the backlight plate.

[0014] In some embodiments of the utility model, each group of second light emitting parts corresponds to a first light transmission hole, and the shape of each first light transmission hole matches the shape of each group of second light emitting parts.

[0015] In some embodiments of the utility model, a reflection layer is further included, which is arranged between the backlight assembly and the light guide plate, and a second light transmission hole is opened on the reflection layer at a position corresponding to the second light emitting part on the backlight plate.

[0016] In some embodiments of the utility model, each group of second light emitting parts corresponds to a second light transmission hole, and the shape of each second light transmission hole matches the shape of each group of second light emitting parts.

[0017] In some embodiments of the utility model, the backlight assembly further includes a protective cover, which is fixedly installed on the side of the backlight plate away from the second light emitting part.

[0018] In some embodiments of the utility model, a frame strip is further included, which is fixed to the side edge of the light guide plate where the first light emitting part is not arranged.

[0019] In some embodiments of the utility model, light guide dots are arranged at positions corresponding to the second light emitting part on the appearance layer, and the arrangement track of the light guide dots corresponds to the arrangement track of the second light emitting part.

[0020] In some embodiments of the utility model, a second bracket is further included, which has a mounting groove formed thereon, and the side edge of the light guide plate where the first light emitting part is arranged is inserted into the mounting groove to be connected with the second bracket.

[0021] In some embodiments of the utility model, a diffusion layer is further included, which is arranged between the light guide plate and the appearance layer.

[0022] The utility model has the advantages that:

[0023] 1、The light guide plate provided by the utility model makes the light from the first light emitting part propagate in the light guide plate through the internal total reflection principle, so that the light is uniformly distributed to the light emitting surface, and basic lighting function is provided.

[0024] 2、The backlight assembly provided by the utility model can specifically illuminate the corresponding patterns printed on the appearance layer, so that the utility model forms a double-layer light source design, provides lighting effects with levels and diversity, and meets the pursuit of lighting technology in the refrigeration equipment.

[0025] 3、The first light emitting part and the second light emitting part in the utility model are both controlled by programs, can cooperate to form more rich light effects, and further improve the levels and diversity of the lighting effects. DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific embodiments of the present application will be described in detail below with reference to the drawings. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

[0027] Figure 1 Structure diagram of double-layer light source;

[0028] Figure 2 Structure diagram of double-layer light source;

[0029] Figure 3 Structure diagram of double-layer light source;

[0030] Figure 4 Structure diagram of double-layer light source; Figure 3 Structure diagram of double-layer light source;

[0031] Figure 5 Structure diagram of double-layer light source; Figure 4 Structure diagram of double-layer light source;

[0032] Figure 6 Structure diagram of double-layer light source;

[0033] In the drawings, the reference signs are as follows:

[0034] 1, light guide plate; 2, appearance layer; 3, first light emitting part; 4, backlight assembly; 41, backlight plate; 42, second light emitting part; 43, first support; 431, first light transmission hole; 44, protective cover; 45, screw; 5, reflection layer; 51, second light transmission hole; 6, diffusion layer; 7, frame strip; 8, second support. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described and explained below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0036] Obviously, the drawings described below are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can be applied to other similar scenarios without creative labor.

[0037] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or any priority. Thus, features with "first", "second", "third" designations can include one or more of the features implicitly or explicitly.

[0038] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning of those terms for a person skilled in the art to which the present application pertains. The terms "a", "an", "one", and the like, as used in the present application, do not denote a quantity of one, but rather denote a quantity of one or more. The terms "including", "containing", "having", and any variations thereof, are intended to cover a non-exclusive inclusion.

[0039] In the description of the present application, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The technical scheme of the present application will be described in detail below in combination with specific embodiments and the accompanying drawings.

[0041] As shown in the accompanying drawings, Figure 1 - the accompanying drawings Figure 6 As shown in the accompanying drawings,

[0042] The light guide plate 1 is a rectangular plate structure, including a light exit surface on the front side, a back surface opposite to the light exit surface, and four side edges. The base material of the light guide plate 1 can be one of glass, acrylic, polycarbonate, etc., but is not limited thereto.

[0043] The appearance layer 2 covers the light exit surface of the light guide plate 1, and its edge is flush with the edge of the light guide plate 1. The appearance layer 2 is a film or diffusion sheet that forms a star point or LOGO pattern that can reflect light by printing, hot stamping, etc. On the one hand, the appearance layer 2 can provide additional protection for the light guide plate 1, and on the other hand, the pattern printed thereon can enrich the light emitting effect of the surface light source.

[0044] The first light-emitting member 3 is a LED light bar, which is installed on the top side of the light guide plate 1 along the length direction of the light guide plate 1, and is used as general lighting in the refrigeration equipment. The light emitted by the first light-emitting member 3 illuminates the light guide plate 1 from top to bottom. The first light-emitting member 3 can be controlled by a preset program, so as to achieve the effect of slow lighting after the refrigerator or other refrigeration equipment is opened. It should be noted that other lighting effects can also be achieved by modifying the preset program, and the utility model does not limit this. In the embodiment, the light-emitting color of the LED light bar can be white, red, blue, purple and the like.

[0045] The backlight assembly 4 comprises a backlight plate 41 and a second light-emitting member 42.

[0046] The backlight plate 41 is used for fixing the second light-emitting member 42, and specifically is a strip-shaped metal plate, which is installed on the back of the light guide plate 1 along the length direction of the backlight plate 41. After installation, the backlight plate 41 and the light guide plate 1 form a gap for accommodating the second light-emitting member, and the two ends of the length direction are connected to the light guide plate 1 directly or indirectly through screws 45.

[0047] The second light-emitting member 42 is a LED lamp bead. The second light-emitting member 42 comprises at least one group, and the number of the second light-emitting members 42 in each group can be the same or different. Each group of the second light-emitting members 42 is arranged and fixed on the mounting plate along a predetermined track to form a specific number, Chinese character or other arbitrary pattern. Each group of the second light-emitting members 42 is arranged towards the light guide layer, so that the light emitted by the second light-emitting member 42 illuminates the appearance layer 2 through the diffusion layer 6. In the embodiment, the pattern formed by each group of the second light-emitting members corresponds to the pattern printed on the appearance layer 2.

[0048] The second light-emitting member can be controlled by a preset program to form a light-emitting effect of light reflection, light change, flicker or breathing. The light-emitting color of the second light-emitting member is ice blue or other light-emitting color different from that of the first light-emitting member 3. It should be noted that other light-emitting effects can also be achieved by modifying the preset program, and the utility model does not limit this.

[0049] In the above scheme, the light guide plate 1 is arranged to make the light from the first light-emitting member 3 propagate in the light guide plate 1 by the principle of internal total reflection, so as to uniformly distribute the light to the light emitting surface, thereby providing a basic lighting function. The addition of the second light-emitting member in the backlight assembly 4 specifically illuminates the corresponding pattern printed on the appearance layer 2, so that the utility model forms a double-layer light source design, provides a lighting effect with levels and diversity, and meets the market pursuit of lighting technology in the refrigeration equipment.

[0050] In some embodiments of the utility model, the backlight assembly 4 further comprises a first support 43, which is arranged between the backlight plate 41 and the light guide layer, provides structural support for the backlight plate 41, and enables a gap for mounting the second light emitting member 42 to be formed between the backlight plate 41 and the light guide plate 1.

[0051] A first light transmission hole 431 is formed in a position on the first support 43 corresponding to the second light emitting member 42 on the backlight plate 41. The first light transmission hole 431 formed on the first support 43 provides an exit path for the light of the second light emitting member, thereby ensuring that the light emitted by the second light emitting member can be smoothly transmitted into the light guide plate 1. The number and position of the first light transmission hole 431 can be flexibly adjusted according to the number and arrangement of the second light emitting member, ensuring that the light can be efficiently propagated into the light guide plate 1 and optimizing the utilization rate of the light.

[0052] In some embodiments of the utility model, in order to achieve the best light transmission effect while avoiding increasing the complexity of the processing of the first support 43, each group of second light emitting members 42 corresponds to a first light transmission hole 431, and the shape of each first light transmission hole 431 matches the shape formed by the arrangement of each group of second light emitting members 42. For example, when the arrangement track of the second light emitting member is rectangular, the opening shape of the first light transmission hole 431 is also correspondingly set to rectangular; if the arrangement track of the second light emitting member is a circular array, the first light transmission hole 431 can also be formed as a circular hole array.

[0053] In some embodiments of the utility model, a reflective layer 5 is further included, which is arranged between the backlight assembly 4 and the light guide plate 1, and a second light transmission hole 51 is formed in a position on the reflective layer 5 corresponding to the second light emitting member 42 on the backlight plate 41. The arrangement of the reflective layer 5 can reflect the downward emitted light back to the light guide plate 1, thereby reducing light loss and further improving the light emitting efficiency of the system. The material of the reflective layer 5 is usually a high-reflectivity metal foil or a film coated with a high-reflectivity material. The second light transmission hole 51 on the reflective layer 5 corresponds one-to-one to the arrangement position of the second light emitting member on the backlight plate 41, ensuring that the light of the second light emitting member can smoothly penetrate the reflective layer 5 and enter the light guide plate 1.

[0054] In some embodiments of the utility model, each group of second light emitting members 42 corresponds to a second light transmission hole 51, and the shape of each second light transmission hole 51 matches the shape formed by the arrangement of each group of second light emitting members 42. In this embodiment, the number, position and shape of the second light transmission hole 51 on the reflective layer 5 correspond to the first light transmission hole 431 on the first support 43.

[0055] In some embodiments of the utility model, the backlight assembly 4 further includes a protective cover 44, the protective cover 44 is fixedly installed on the side of the backlight plate 41 away from the second light emitting member 42, the protective cover 44 is fixedly connected with the first support 43 through a screw 45, at least partially covers the back of the backlight plate 41, so as to prevent dust, moisture and other pollutants from invading the inside of the backlight assembly 4, and guarantee the long-term stable operation of the light source. The protective cover 44 can be made of transparent or translucent material to prevent excessive reflection or scattering of light.

[0056] In some embodiments of the utility model, a frame strip 7 is further included, the frame strip 7 is arranged on one side of the light guide plate 1, which plays a role of structural support, preventing the light guide plate 1 from being displaced due to vibration or impact; on the other hand, the frame strip 7 can also play a role of light shielding on the side edge where the first light emitting member 3 is not arranged, preventing unnecessary light leakage, thereby improving the light efficiency of the system. The frame strip 7 can be made of light-proof material (such as plastic or metal), which is tightly matched with the edge of the light guide plate 1, ensuring good constraint and guidance of light. In the present embodiment, the frame strip 7 specifically includes a left frame strip and a right frame strip, which are respectively installed on the left and right sides of the light guide plate 1.

[0057] In some embodiments of the utility model, in order to further enrich the light emitting effect of the area light source, light guide dots are arranged at the positions corresponding to the second light emitting member 42 on the appearance layer 2, the arrangement track of the light guide dots corresponds to the arrangement track of the second light emitting member 42, and the shape of the light guide dots is one or a combination of multiple of a rhombus, a regular pentagon, a regular triangle, a circle, a regular hexagon, an ellipse and a regular octagon. The light with light changing, flickering, breathing and other effects emitted by the second light emitting member 42 is displayed through the pattern of the light guide dots.

[0058] In some embodiments of the utility model, a second support 8 is further included, the second support 8 is made of metal material, and an installation slot with an opening downward is formed on the second support 8, the side edge of the light guide plate 1 with the first light emitting member 3 installed is inserted into the installation slot and connected with the second support 8, and the first light emitting member 3 is fixedly installed in the installation slot. The second support 8 is arranged on one side to encapsulate the light emitting body, improving the safety of the area light source, and on the other side, the support made of metal improves the heat dissipation efficiency of the first light emitting body, prolonging the service life of the light source.

[0059] In some embodiments of the utility model, a wire layer is further included, which includes a plurality of wires, the wires are electrically connected with the first light emitting member 3 or the second light emitting member 42, and the wires are distributed on the back of the light guide layer or extend along the edge of the light guide layer. The arrangement of the wire layer provides an electrical connection path, making the power supply of the first light emitting body and the second light emitting member more efficient and stable. The wires can be made of printed circuit technology or flexible circuit board.

[0060] The working principle of the utility model is as follows:

[0061] The first light emitting member 3 is used to light the light guide plate from top to bottom, so as to realize the illumination purpose of the general surface light source and serve as the background light source of the pattern printed on the appearance layer 2. The color of the first light emitting member 3 can be white, red, blue, purple and the like. The first light emitting member 3 can be controlled by a program, so as to realize the effect of slow lighting after the refrigerator or other refrigeration equipment is opened.

[0062] The appearance layer 2 is formed with a star point pattern, a LOGO pattern or a character pattern (such as bacteria removal, odor removal and freshness maintenance) by printing, hot stamping and the like. The second light emitting member 42 on the back light plate 41 is used to light, and the light emitted by the second light emitting member 42 passes through the light transmission hole on the first support 43 and the reflection layer 5 to light the pattern printed on the appearance layer 2. The second light emitting member 42 can be controlled by a designed program, so as to realize the light emitting effects of cycle lighting and extinguishing, light breathing or galloping.

[0063] It should be noted that: the various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to.

[0064] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones without departing from the spirit of the present application. They should be covered in the technical solution range of the present application.

Claims

1. A dual-layer light source, characterized in that, include: The light guide plate includes a light-emitting surface, a back surface opposite to the light-emitting surface, and four sides; An outer layer, covering the light-emitting surface of the light guide plate; The first light-emitting element is installed on at least one side of the light guide plate; Backlight assembly, the backlight assembly comprising: A backlight panel is installed on the back of the light guide plate; The second light-emitting element includes at least one group, each group of the second light-emitting elements is arranged and fixed on the backlight plate along its respective predetermined trajectory, and each group of the second light-emitting elements is disposed facing the light guide plate so that the light emitted by the second light-emitting element passes through the light guide plate to illuminate the outer layer.

2. The dual-layer light source according to claim 1, characterized in that, The backlight assembly further includes a first bracket, which is disposed between the backlight plate and the light guide plate, and a first light-transmitting hole is formed on the first bracket at a position corresponding to the second light-emitting element on the backlight plate.

3. The dual-layer light source according to claim 2, characterized in that, Each group of second light-emitting elements corresponds to a first light-transmitting hole, and the shape of each first light-transmitting hole matches the shape formed by the arrangement of each group of second light-emitting elements.

4. The dual-layer light source according to any one of claims 1-3, characterized in that, It further includes a reflective layer, which is disposed between the backlight assembly and the light guide plate, and a second light-transmitting hole is formed on the reflective layer at a position corresponding to the second light-emitting element on the backlight plate.

5. The dual-layer light source according to claim 4, characterized in that, Each group of second light-emitting elements corresponds to a second light-transmitting hole, and the shape of each second light-transmitting hole matches the shape formed by the arrangement of each group of second light-emitting elements.

6. The dual-layer light source according to any one of claims 1-3, characterized in that, The backlight assembly further includes a protective cover, which is fixedly mounted on the side of the backlight panel away from the second light-emitting element.

7. The dual-layer light source according to claim 1, characterized in that, It further includes a frame strip, which is fixed to the side of the light guide plate where the first light-emitting element is not located.

8. The dual-layer light source according to claim 1, characterized in that, The outer layer is provided with light guide dots arranged at positions corresponding to the second light-emitting element, and the arrangement trajectory of the light guide dots corresponds to the arrangement trajectory of the second light-emitting element.

9. The dual-layer light source according to claim 1, characterized in that, It further includes a second bracket, on which a mounting groove is formed, and the side of the light guide plate on which the first light-emitting element is mounted is inserted into the mounting groove and connected to the second bracket.

10. The dual-layer light source according to claim 1, characterized in that, It further includes a diffusion layer disposed between the light guide plate and the outer layer.

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