CN215770341U - Display device and power utilization device - Google Patents

Abstract

The disclosure relates to a display device and an electric device. The display device comprises a plurality of light emitters; the printed circuit board is provided with a plurality of luminous bodies; the printed circuit board controls the display device to display a graph by controlling the brightness of the plurality of luminous bodies; the reflecting support is arranged on the printed circuit board and provided with a plurality of reflecting cavities, and the luminous body is arranged in the reflecting cavities and used for reflecting light emitted by the luminous body; and the light shading body is arranged on the reflection support, is positioned between the adjacent reflection cavities and is used for preventing the adjacent light interference of the luminous body. The reflection cavity that the reflection support has can go out the reflection with the light of luminous body, improves light reflectivity. The light-shading body is arranged on the reflection support and located between the adjacent reflection cavities, and interference of light rays emitted by the luminous bodies in the two adjacent reflection cavities is avoided, so that a clearer and more accurate graph is formed.

Description

Display device and power utilization device

Technical Field

The present disclosure relates to the field of intelligent display information, and in particular, to a display device and a power utilization apparatus.

Background

At present, various household electric equipment also needs to display information such as time, temperature, calendar or lunar calendar and the like while realizing functions of the household electric equipment, and the household electric equipment has multiple purposes. However, in the related art, it is necessary to provide a skylight on the electric equipment, such as a lens, for displaying the information of the time, the temperature, the date, etc. In this case, a special component is additionally required to display the time, temperature, date and other information, so that the overall aesthetic degree of the household appliance is damaged while the design and installation costs are increased.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a display device and a power consumption apparatus.

According to a first aspect of embodiments of the present disclosure, there is provided a display apparatus including: a plurality of light emitters; the printed circuit board is provided with a plurality of luminous bodies; the printed circuit board controls the display device to display a graph by controlling the brightness of the plurality of luminous bodies; the reflecting support is arranged on the printed circuit board and provided with a plurality of reflecting cavities, and the luminous body is arranged in the reflecting cavities and used for reflecting light emitted by the luminous body; and the light shading body is arranged on the reflection support, is positioned between the adjacent reflection cavities and is used for preventing the adjacent light interference of the luminous body.

In some embodiments, the display device further comprises: the diffusion membrane is covered on the top of the reflection bracket; the diffusion film is provided with a preset pattern at the position corresponding to each reflection cavity and is used for enabling light emitted by the luminous body to penetrate through the diffusion film to form the preset pattern; the printed circuit board controls the plurality of luminous bodies to shine to form a plurality of preset patterns, and the preset patterns are combined into the graph.

In some embodiments, the diffusion film is provided with a light-shielding ink by which the predetermined pattern is formed.

In some embodiments, the opacifying ink is black.

In some embodiments, the display device further comprises: the light reflecting plate surrounds the light emitting body and is used for reflecting the light emitted by the side face of the light emitting body to the diffusion diaphragm.

In some embodiments, the reflective cavity is a through hole through the reflective support, the reflective cavity being trumpet shaped.

In some embodiments, the display device is further provided with: and the black adhesive body is arranged between the bottom of the reflection bracket and the printed circuit board and is used for preventing the bottom from light crosstalk.

In some embodiments, the reflective support is provided in white.

In some embodiments, the walls of the reflective cavity are high brightness mirror shaped.

In some embodiments, the plurality of light emitters are arranged in an array on the printed circuit board.

In some embodiments, the display device further comprises: and the radiating fin is arranged on the back surface of the printed circuit board.

In some embodiments, the light emitter is a light emitting diode or an organic light emitting diode.

According to a second aspect of the embodiments of the present disclosure, there is provided an electric device including: a housing for transmitting infrared rays; the display device of the first aspect, enclosed within the housing.

In some embodiments, the housing is resiliently pre-stressed assembled with the shade.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the reflection cavity that the reflection support has can go out the reflection with the light of luminous body, improves light reflectivity. The light-shading body is arranged on the reflection support and located between the adjacent reflection cavities, and interference of light rays emitted by the luminous bodies in the two adjacent reflection cavities is avoided, so that a clearer and more accurate graph is formed.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a cross-sectional view illustrating a display apparatus according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the related art, the household electric appliance has functions of displaying information such as time, temperature, humidity, date and the like after being activated, in addition to the functions of the household electric appliance. For example, a sound box is a household appliance commonly used in a home, and the sound box has not only a function of playing music but also a function of displaying information such as time, temperature, date, and the like. Meanwhile, the switching, playing and searching of the sound can be controlled through voice. Other household devices can also be controlled by controlling the sound equipment.

However, in order to implement the above functions, a skylight needs to be formed on the electric equipment, such as a lens, a sound box iron net, an air conditioner display lens, and the like. In this case, a special component is additionally required to display the time, temperature, date and other information, so that the overall aesthetic degree of the household appliance is damaged while the design and installation costs are increased.

Therefore, to solve the above technical problem, according to an exemplary embodiment, the present disclosure provides a display device, as shown in fig. 1, including: and a plurality of luminous bodies 10, wherein the luminous bodies 10 are used as light source bodies for emitting light and providing brightness. In the present embodiment, the light source emitted from the light emitting body 10 is white.

In some embodiments, the light emitter 10 is an inorganic Light Emitting Diode (LED) or an Organic Light Emitting Diode (OLED).

Among them, the light emitting diode is made of a compound containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), and the like. When electrons and holes are recombined, visible light is radiated, so that the light-emitting diode can be manufactured. In circuits and instruments as indicator lights or to form text or numerical displays. Gallium arsenide diodes emit red light, gallium phosphide diodes emit green light, silicon carbide diodes emit yellow light, and gallium nitride diodes emit blue light. Organic Light Emitting Diodes (OLEDs) and inorganic Light Emitting Diodes (LEDs) are also classified by their chemical nature.

In some embodiments, the display device further comprises a printed circuit board 20. A plurality of light emitters 10 are disposed on the printed circuit board 20. The printed circuit board 20 controls the display device to display graphics by controlling the brightness of the plurality of luminous bodies 10.

Further, a plurality of luminous bodies 10 are commonly connected to one printed circuit board 20. The printed circuit board 20 charges the plurality of light emitters 10 and controls the brightness of the light emitters 10. In some embodiments, the plurality of light emitters 10 are arranged in an array on the printed circuit board 20. The array arrangement means that a plurality of luminous bodies 10 are arranged up, down, left and right. The pattern formed on the printed circuit board 20 by the plurality of light emitters 10 may be any shape such as a square, a circle, or a triangle, and may be designed according to design requirements and appearance requirements of a sound device, which is not limited herein.

Further, the printed circuit board 20 may have a planar shape or an arc-shaped structure. The shape of the printed circuit board 20 corresponds to the external structure of the electric device, and is not particularly limited herein.

In some embodiments, the display device further includes a reflective support 30, the reflective support 30 is disposed on the printed circuit board 20, the reflective support 30 is provided with a plurality of reflective cavities 31, and the light emitters 10 are disposed in the reflective cavities 31 for reflecting light emitted from the light emitters 10.

Further, in one embodiment, the reflective cavity 31 is a through hole that passes through the reflective support 30. The reflection bracket 30 is fixed on the printed circuit board 20, the reflection bracket 30 has a through hole, and as can be seen from the above, the plurality of luminous bodies 10 are disposed on the printed circuit board 20, and the luminous bodies 10 are located in the reflection cavity 31, which is equivalent to the reflection bracket 30 covering the luminous bodies 10 in the reflection cavity 31.

Further, the reflective cavity 31 is trumpet-shaped. I.e. the reflective cavity 31 has a small open end and a large open end. The small open end abuts the printed circuit board 20. As can be seen from the above, the printed circuit board 20 is provided with a plurality of light emitters 10, so that the light emitters 10 are located at the small end of the reflective cavity 31. Therefore, the horn-shaped reflective cavity 31 of the present disclosure can diffuse the light emitted from the light emitting body 10 at the small opening end.

In one particular embodiment, the reflective cavity 31 has a cylindrical hole and a flared hole, with the cylindrical hole interfacing with the printed circuit board 20. The cylindrical hole has no ability to reflect light, and the cylindrical hole concentrates the light emitted from the light emitting body 10 to the bell-mouthed hole for transmission, and the bell-mouthed hole diffuses the light transmitted from the cylinder. Therefore, the disclosure can reduce the leakage of the side light of the luminous body 10 at the self position, and also ensure that the light entering the bell mouth can maintain enough light intensity on the basis of ensuring uniform diffusion.

In one embodiment, the inclination angle of the hole wall of the trumpet hole is set to be 0-45 degrees. Therefore, the horn hole of the reflection cavity 31 is arranged at an inclined angle, so that light emitted by the light-emitting body 10 into the reflection cavity 31 can be reflected for multiple times, and finally emitted out from the cavity opening of the reflection cavity 31, and the utilization rate of the light is improved.

In some embodiments, the reflective support 30 is provided in white. In some embodiments, the walls of the reflective cavity 31 are high brightness mirrored. Since the light emitted from the light emitting body 10 is white, and the white reflective support 30 can be matched with the white light emitted from the light emitting body 10, color mixing can be avoided. On the other hand, the white reflecting support 30 is combined with the high-brightness mirror surface on the inner wall of the reflecting cavity 31, so that the reflection of the light emitted by the luminous body 10 can be further enhanced, and the utilization rate of the light emitted by the luminous body 10 is improved.

In some embodiments, the display device further comprises a diffusion membrane 40. The diffusion film 40 is covered on the top of the reflection bracket 30. I.e. at the end of the large mouth near the reflecting cavity 31. The diffusion module can make the light emitted from the light-emitting body 10 be uniformly displayed, i.e. provide a uniform surface light source for the display device.

The diffusion film 40 is provided with a predetermined pattern at a position corresponding to each of the reflective cavities 31, so that the light emitted from the light emitting body 10 passes through the diffusion film 40 to form the predetermined pattern. Specifically, the diffusion die is provided with a preset pattern at a cavity opening corresponding to the reflective cavity 31, and the preset pattern is fixed. After the light emitting body 10 emits light, the light penetrates the diffusion film 40, and a predetermined pattern may be formed. The preset pattern can be square, round, triangular, diamond and the like.

The printed circuit board 20 controls the plurality of luminous bodies 10 to illuminate to form a plurality of preset patterns, and the plurality of preset patterns are combined into a graph. Specifically, the printed circuit board 20 controls a part of the luminous bodies 10 to be turned off, and controls a part of the luminous bodies 10 to be lighted. The plurality of luminous bodies 10 which are lighted are combined to form a figure to be displayed by the display device through a preset pattern formed by the diffusion film 40.

In one embodiment, the display device of the present disclosure may display numbers. For example, when the number 8 is displayed, there are 7 display positions, each display position is composed of a plurality of light emitters 10, the printed circuit board 20 controls the light emitters 10 located at the corresponding display position to emit light, and the light emitters 10 located at other positions are turned off and do not emit light. As can be seen from the above, each light-emitting body 10 is affected by the predetermined pattern on the diffusion film 40 to form the predetermined pattern, and the pattern on the display position to be displayed is formed by combining a plurality of predetermined patterns.

In some embodiments, the diffusion membrane 40 is provided with a light-shielding ink by which a predetermined pattern is formed. In some embodiments, the opacifying ink is black. The light-blocking ink may be applied to the diffusion membrane 40 by coating, spraying, or the like. The black shading ink forms a preset pattern, so that the shading effect is better, and the light boundary transmitted by the luminous body 10 is clearer. The shape formed by combining a plurality of preset patterns is clearer and more concrete.

In some embodiments, the display device is further provided with a light-shielding body 50. The light shielding body 50 is disposed on the reflective support 30 and between the adjacent reflective cavities 31 for preventing light interference of the adjacent light emitters 10. Further, in one embodiment, the light-shielding body 50 may be a light-shielding foam. The light shielding body 50 can prevent the light emitted from the light emitting bodies 10 in the reflective cavity 31 from interfering with each other at the opening of the reflective cavity 31, so that the outline of the finally presented figure is clearer.

In some embodiments, the display device is further provided with a black adhesive body 60. The black adhesive body 60 is disposed between the bottom of the reflective support 30 and the printed circuit board 20 for preventing bottom crosstalk. In this embodiment, the black adhesive 60 can firmly fix the reflection bracket 30 on the printed circuit board 20 to prevent the reflection bracket 30 from falling off. On the other hand, since the reflective cavity 31 of the reflective holder 30 is a through hole, the reflective holder 30 abuts against the printed circuit board 20, and the light emitting body 10 is located at the small port of the reflective cavity 31, the black adhesive body can prevent the light of the light emitting body 10 at the small port of the reflective cavity 31 from leaking. Avoiding crosstalk of light from the luminaries 10 in adjacent reflective cavities 31.

In one embodiment, the black adhesive body 60 is black bubble gum. The foam adhesive tape is manufactured by coating a solvent type (or hot melt type) pressure-sensitive adhesive on one side or two sides of EVA (ethylene vinyl acetate) or PE (polyethylene) foam which is taken as a base material and then compounding release paper. Has sealing and shock absorbing effects. Has excellent sealing property, compression deformation resistance, flame retardancy, wetting property and the like. The product is widely applied to electronic and electric products, mechanical parts, various small household appliances, mobile phone accessories, industrial instruments, computers and peripheral equipment, automobile accessories, audio and video equipment, toys, cosmetics and the like.

In some embodiments, the display device further comprises: a reflector 70. The light reflection plate 70 is disposed around the light emitting body 10 to reflect light emitted from the side of the light emitting body 10 to the diffusion film 40. In one embodiment, the reflective sheet 70 may be a reflective ink.

Furthermore, the reflective plate 70 is also disposed on the printed circuit board 20, the thickness of the reflective plate 70 is equal to the thickness of the light emitter 10, so that the light of the light emitter 10 can be prevented from leaking from the side of the light emitter 10, and in addition, the reflective plate 70 and the light emitter 10 are both located at the bottom of the reflective cavity 31, so that the light reflected from the reflective cavity 31 can be reflected again until being reflected to the diffusion membrane 40 and then emitted from the diffusion membrane 40.

Further, the reflection plate 70 is made of a white material, like the reflection bracket 30.

In the above embodiments, the light emitter 10 may have any shape such as a square, a circle, a diamond, etc., and since the reflective plate 70 is disposed around the light emitter 10, the inner contour of the reflective plate 70 corresponds to the outer contour of the light emitter 10. The shape of the luminous body 10 and the shape of the light reflection plate 70 are not particularly limited herein.

The following reflection paths of the light emitted by the light emitter 10 include:

directly into the diffusion membrane 40;

a small part of light reaches the reflecting cavity 31 after being reflected by the diffusion membrane 40, and enters the diffusion membrane 40 again after being reflected by the reflecting cavity 31 for multiple times;

part of the light and the light reflected by the reflective cavity 31 reach the reflective plate 70, and the light reflected by the reflective plate 70 reenters the diffusion membrane 40 or the reflective cavity 31, and finally, after multiple reflections by the reflective plate 70 or the reflective cavity 31, most of the light enters the diffusion membrane 40, and finally, the graph to be presented by the display device is presented.

In some embodiments, the display device further comprises a heat sink 80. The heat sink 80 is disposed on the back side of the printed circuit board 20. The heat dissipation sheet 80 can dissipate the heat generated by the light emitting body 10 in time, so as to avoid burning of the light emitting body 10 due to over-high temperature, reduce replacement cost and prolong service life.

Based on the same inventive concept, there is provided an electric device, comprising: a housing 90 and the above-mentioned display device, which is enclosed in the interior of the housing 90 wherein the housing 90 is injection molded. Therefore, the present disclosure can prevent the display device inside the housing 90 from being seen from the outside of the housing 90 when the display device is not activated, and can ensure the overall aesthetic appearance of the housing 90. The integrity of the housing 90 is assured because no fenestrations are provided on the housing 90. The shell 90 does not need to be windowed, the shell 90 can be produced in batch, the part cost and the production cost which need to be increased are reduced, the production efficiency is high, and the delivery pressure is reduced. The design of the windowing structure need not be considered, and the design of the outer shell 90 can be more extensive.

Further, the housing 90 can transmit infrared rays. Therefore, the infrared emitter inside the electric device can penetrate the housing 90, thereby increasing the infrared emission rate. The television can control other household appliances and other equipment through infrared rays. It should be noted that the function of infrared rays in the electric equipment mentioned above is only exemplary, and is not used to limit the scope of the present disclosure.

In some embodiments, the housing 90 is resiliently pre-loaded with the shade 50. As can be seen from the above, the light-shielding body 50 may be foam. And the foam is a material foamed by plastic particles. The foam is divided into PU foam, antistatic foam, conductive foam and the like. The foam has the characteristics of elasticity, light weight, quick pressure-sensitive fixation, convenient use, free bending, ultrathin volume, reliable performance and the like.

Therefore, the outer shell 90 abuts against the light shielding body 50, and the light shielding body 50 is made of foam, so that on one hand, the contact between the display device and the outer shell 90 can be buffered, the friction between the outer shell 90 and the reflection support 30 can be avoided, the abrasion between the outer shell 90 and the reflection support 30 caused by the friction is avoided, and the service life is prolonged. On the other hand, the light shielding body 50 can prevent interference of light rays emitted from the light emitting bodies 10 in the adjacent reflective cavities 31.

In addition, the light shielding body 50 and the outer shell 90 are elastically pre-pressed for assembly, so that the light shielding body 50 can be prevented from falling off, stacking between the display device and the outer shell 90 in the depth direction is smaller, and the space inside the outer shell 90 is fully utilized.

In summary, according to the above structure, the present disclosure has the following advantages:

1. the reflective support 30 has a reflective cavity 31 for reflecting the light from the light emitting device 10, so as to improve the light reflectivity. The light shielding body 50 is disposed between the adjacent reflective cavities 31 in the reflective support 30, so as to avoid interference of light rays emitted by the light emitting bodies 10 in the adjacent reflective cavities 31, thereby forming a clearer and more accurate pattern.

2. The light shielding body 50 can prevent the light emitted from the light emitting bodies 10 in the reflective cavity 31 from interfering with each other at the opening of the reflective cavity 31, so that the outline of the finally presented figure is clearer.

3. The display device inside the housing 90 can be prevented from being seen from the outside of the housing 90 when the display device is not activated, and the overall beauty of the housing 90 can be ensured. The integrity of the housing 90 is assured because no fenestrations are provided on the housing 90. The shell 90 does not need to be windowed, the shell 90 can be produced in batch, the part cost and the production cost which need to be increased are reduced, the production efficiency is high, and the delivery pressure is reduced. The design of the windowing structure need not be considered, and the design of the outer shell 90 can be more extensive.

4. The shell 90 abuts against the light shielding body 50, so that the contact between the display device and the shell 90 can be buffered, the friction between the shell 90 and the reflection support 30 can be avoided, the abrasion caused by the friction is avoided, and the service life is prolonged. On the other hand, the light-shielding body 50 and the housing 90 are elastically pre-pressed for assembly, so that the light-shielding body 50 can be prevented from falling off, stacking between the display device and the housing 90 in the depth direction can be smaller, and the space inside the housing 90 can be fully utilized.

It is understood that, in order to implement the above functions, the electric device provided in the embodiments of the present disclosure includes a hardware structure and/or a software module for performing each function. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

With regard to the power consumption device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the display device, and will not be elaborated here.

The household electric equipment can be equipment such as a sound box, a game console, a tablet device, medical equipment, body-building equipment, a personal digital assistant, a translator, a watch, a bracelet, an electric water heater, a gas water heater, a water purifier, a water dispenser, a range hood, a stove, a dish washer, a disinfection cabinet and the like.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims (14)

1. A display device, comprising:

a plurality of light emitters;

the printed circuit board is provided with a plurality of luminous bodies; the printed circuit board controls the display device to display a graph by controlling the brightness of the plurality of luminous bodies;

the reflecting support is arranged on the printed circuit board and provided with a plurality of reflecting cavities, and the luminous body is arranged in the reflecting cavities and used for reflecting light emitted by the luminous body;

and the light shading body is arranged on the reflection support, is positioned between the adjacent reflection cavities and is used for preventing the adjacent light interference of the luminous body.

2. The display device according to claim 1, characterized in that the display device further comprises:

the diffusion membrane is covered on the top of the reflection bracket;

the diffusion film is provided with a preset pattern at the position corresponding to each reflection cavity and is used for enabling light emitted by the luminous body to penetrate through the diffusion film to form the preset pattern;

the printed circuit board controls the plurality of luminous bodies to shine to form a plurality of preset patterns, and the preset patterns are combined into the graph.

3. The display device according to claim 2, wherein the diffusion film is provided with a light-shielding ink by which the predetermined pattern is formed.

4. The display device according to claim 3, wherein the light-shielding ink is black.

5. The display device according to claim 2, characterized in that the display device further comprises:

the light reflecting plate surrounds the light emitting body and is used for reflecting the light emitted by the side face of the light emitting body to the diffusion diaphragm.

6. The display device of claim 1, wherein the reflective cavity is a through hole through the reflective support, and wherein the reflective cavity is flared.

7. The display device according to claim 6, wherein the display device is further provided with:

and the black adhesive body is arranged between the bottom of the reflection bracket and the printed circuit board and is used for preventing the bottom from light crosstalk.

8. A display device as claimed in claim 6, characterised in that the reflective support is arranged to be white.

9. The display device according to claim 6, wherein a wall of the reflective cavity has a high brightness mirror shape.

10. The display device of claim 1, wherein a plurality of the light emitters are arranged in an array on the printed circuit board.

11. The display device according to claim 1, characterized in that the display device further comprises:

and the radiating fin is arranged on the back surface of the printed circuit board.

12. The display device according to claim 1, wherein the light-emitting body is a light-emitting diode or an organic light-emitting diode.

13. An electric device, comprising:

a housing for transmitting infrared rays;

the display device of any one of claims 1-12, enclosed inside the housing.

14. The power utilization device of claim 13,

and the shell and the light shading body are assembled in an elastic prepressing manner.

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