CN113784464B

CN113784464B - Multi-source light mixing device and drying equipment

Info

Publication number: CN113784464B
Application number: CN202111325476.9A
Authority: CN
Inventors: 刘楚枫
Original assignee: Shenzhen Ruyuan Technology Co ltd
Current assignee: Shenzhen Ruyuan Technology Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-08
Anticipated expiration: 2041-11-10
Also published as: CN113784464A

Abstract

The application relates to the technical field of light emitting systems, and discloses a multisource mixed light device and drying equipment, wherein multisource mixed light device includes: a first light source and a second light source, the first light source comprising an optical element and one or more first light-emitting members capable of emitting light of a first spectrum through the optical element; the second light source is positioned outside the first light source light path and comprises one or more second light-emitting pieces, and the second light-emitting pieces emit second spectrum light to the optical element; the first spectrum light and the second spectrum light are mixed at the intersection of the optical element to present a preset color. The second light source in this application can send light to optical element on the premise of not influencing the function of first light source itself, thereby mixes with the light of first light source and changes the colour of optical element at least partial region for the user can obtain tip information through the colour change on the optical element, for example current operating position etc. of first light source.

Description

Multi-source light mixing device and drying equipment

Technical Field

The application relates to the technical field of light emitting systems, in particular to a multi-source light mixing device and drying equipment.

Background

Light can provide illumination and display colors, and can radiate heat, and in the prior art, light heating equipment using a light source as a heating body is used for heating in a light radiation mode, such as a bathroom heater, a small solar electric heater and the like. In a new generation of drying apparatus, infrared halogen lamps are used as heat sources instead of heating wires. In the light-warm equipment, the light source itself provides heat and simultaneously emits visible light, and a user can know whether the light-warm equipment is in normal operation or not by observing the light-emitting state.

Because the light source has a preset spectrum and shows a corresponding color, after the power of the light source is changed in different working modes, the presented radiation color is relatively similar, and only slight change of brightness or hue may exist, which is difficult to be perceived by a user.

Disclosure of Invention

The application provides a multisource mixed light device and drying equipment, aims at solving the problem that the light source color change range among the prior art is little, the prompt message that is easy to perceive is difficult to provide for the user.

The application provides a multisource mixed light device, includes: a first light source and a second light source, the first light source comprising an optical element and one or more first light-emitting members capable of emitting light of a first spectrum through the optical element; the second light source is positioned outside the first light source light path and comprises one or more second light emitting pieces, and the second light emitting pieces emit second spectrum light to the optical element; the first spectrum light and the second spectrum light are mixed at the intersection of the first spectrum light and the second spectrum light on the optical element to present a preset color.

The multisource light mixing device in this application has set up the second light source outside the light path of first light source, the second light source is not influencing under the prerequisite of first light source function itself, can send light to optical element, thereby mix with the light of first light source and change the colour of at least part region on the optical element, no matter present new colour, or changed original colour, also perhaps present two kinds of colours simultaneously, can both make the user obtain the tip information through the colour change that observes on the optical element, for example, the current work gear of first light source etc..

The application also provides drying equipment which comprises a shell and the multi-source light mixing device; the shell is provided with a first opening, the first light source is arranged in the shell and faces the first opening, and the first spectrum light emitted by the first light emitting piece is infrared radiation.

Adopt drying equipment in this application, the infrared radiation that produces through first light source when using heats the drying to outside target, and the second light source that is located outside first light source light path can launch light and infrared radiation and mix to change optical element and go up at least partial regional colour. Generally, the infrared radiation is red on the optical element, for example, the adopted second light source can emit green light, the red light and the green light are mixed on the optical element and then appear yellow in the mixed area, the color is obviously different from the original red color, prompt information can be provided remarkably, and a user can obtain the prompt information by observing the color of the light-emitting part on the optical element, for example, the current working gear of the first light source is identified.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 to 3 are schematic optical path diagrams of a multi-source light mixing device according to some embodiments of the present disclosure;

FIG. 4 is a schematic illustration of transmission curves of optical elements in certain embodiments of the present application;

FIGS. 5 and 6 are schematic diagrams of pattern displays in certain embodiments of the present application;

FIG. 7 is a schematic diagram of a unit cell assembly of an optical element according to some embodiments of the present disclosure;

FIG. 8 is a schematic illustration of a partial explosion of a drying apparatus provided in certain embodiments of the present application;

FIG. 9 is a schematic illustration of a spot area of an optical element provided in certain embodiments of the present application;

FIGS. 10 and 11 are schematic optical path diagrams of drying apparatus provided in certain embodiments of the present application;

FIGS. 12 and 13 are schematic illustrations of the gas flow outlet and optical element arrangement in certain embodiments of the present application;

fig. 14 is a schematic diagram of a control module of a drying apparatus provided in certain embodiments of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the embodiments of the present application, and are not to be construed as limiting the embodiments of the present application.

As shown in fig. 1 to 7, the present embodiment provides a multi-source light mixing device, which includes a first light source 10 and a second light source 20. The first light source 10 includes a first light emitting element 11 and an optical element 30, the first light emitting element 11 can emit a first spectrum light 12 to pass through the optical element 30, and the first spectrum light 12 passes through the optical element 30 to provide functions of illumination, heat generation, and the like. When the first spectrum of light 12 passes through the optical element 30, the optical element 30 exhibits a first color corresponding to its spectrum.

Optical element 30 is a structure capable of transmitting light and may include lenses, reflectors, prisms, gratings, beam splitters, filters, or combinations thereof that alter or redirect light. In some embodiments, the optical element 30 may be a lens. In some embodiments, the optical element 30 may be a fresnel lens. The optical element 30 can change the light transmittance to a specific wavelength by means of a film coating, a stacked arrangement of lenses with different optical properties, and the like, and can present a predetermined color. For example, the emission spectrum of the first light source 10 includes visible light with multiple wavelengths, the optical element 30 only allows light with a specific wavelength interval to pass through, and the light-emitting surface of the optical element 30 presents a color corresponding to the wavelength of the interval. For example, the first light source 10 is an infrared radiation source designed to provide infrared radiation to a human body or other target, and in order to avoid visible light from being transmitted out, the corresponding optical element 30 is designed to be transmitted in the infrared band and block the visible band as much as possible, and the first spectrum light 12, i.e. the light with the peak located in the infrared band. In some embodiments, the optical element 30 may be a lens disposed outside the first light-emitting member 11, for example, the first light source 10 has a lamp cup 13, the first light-emitting member 11 is disposed inside the lamp cup 13, the optical element 30 is disposed at an opening of the lamp cup 13, and the lamp cup 13 converges the first spectrum light 12 and then emits the first spectrum light from the optical element 30. In other embodiments, the first light source 10 itself has a transparent light-transmissive envelope, which forms the optical element 30.

The second light source 20 includes one or more second light emitting members 211, and the second light emitting members 211 emit second spectrum light 212 to the optical element 30. The second light source 20 mainly functions to mix light with the first light source 10 to exhibit a predetermined color, and therefore, it can be considered that the second light source 20 mainly functions to provide illumination light. The first spectrum of light 12 and the second spectrum of light 212 are meant to be light having different spectra, represented on a wave diagram, i.e. having different peaks and/or amplitudes, and being light emitted by two different light sources.

The first light emitting element 11, i.e., the first light source 10 actually emits light, and the second light emitting element 211, i.e., the second light source 20 actually emits light, in some embodiments, the first light emitting element 11 and the second light emitting element 211 may be tungsten wires in halogen lamps, LED chips in LED lamp beads, or other specific light emitting structures. In other embodiments, the first light emitting element 11 and the second light emitting element 211 may also be a complete halogen lamp or an LED lamp bead, and a specific light emitting structure, such as a filament, an LED chip, etc., is disposed inside the first light emitting element and the second light emitting element. The specific structures of the first light emitting element 11 and the second light emitting element 211 are not limited.

The second light source 20 is located outside the optical path of the first light source 10, the optical path of the first light source 10 refers to the propagation path of the first spectrum light 12 emitted by the first light source, and the second light source 20 is located outside the optical path of the first light source 10 means that the second light source 20 is not substantially illuminated by the first spectrum light 12. In other words, the second light source 20 does not block the light of the first light source 10, and does not affect the optical performance of the first light source 10 itself. For example, the first light source 10 can form a complete light spot at a preset distance, and the second light source 20 is located outside the optical path of the first light source 10, and whether it exists or not, does not affect the integrity and brightness of the light spot generated by the first light source 10 at the preset distance.

As shown in fig. 1 to 3, a multi-source light mixing device has the following working conditions during operation: (1) a first color associated with the first spectrum of light 12 is present on the optical element 30 when the first light source 10 is in operation and the second light source 20 is not in operation; (2) when the first light source 10 is not operating and the second light source 20 is operating, a second color associated with the second spectrum of light 212 is present on the optical element 30: (3) when the first light source 10 and the second light source 20 operate simultaneously, the first spectrum light 12 and the second spectrum light 212 meet on the optical element 30, and the first spectrum light and the second spectrum light are mixed at the meeting point to form a mixed light 40, and the mixed light 40 presents a predetermined color, which is hereinafter referred to as a third color.

In one specific embodiment, the first spectrum of light 12 is red on the optical element 30 and the second spectrum of light 212 is yellow on the optical element 30, and the mixed light 40 is orange. It should be noted that, as can be seen from the foregoing, the color of the first spectrum light 12, the second spectrum light 212 or the mixed light 40 appearing on the optical element 30 not only corresponds to the color of the visible light included in the spectrum thereof, but also relates to the optical performance of the optical element 30 itself, and they are not necessarily the same. In one embodiment, the first spectrum 12 has a red peak and appears red on a common optical element and green on a specially designed optical element, the latter allowing only green light in the optical band to pass through, and thus green, by the transmittance of the coating.

From the above-mentioned several operating conditions, at least three colors can be displayed on the optical element 30: a first color, a second color, and a third color. It will be readily appreciated that in some embodiments, the first spectrum of light 12 covers the entire optical element 30, and the second spectrum of light 212 does not cover the entire optical element 30, and when the first light source 10 and the second light source 20 are operated simultaneously, only a portion of the optical element 30 has the mixed light 40 and thus the third color, and the other portion still has the first color, i.e., the optical element 30 has two colors simultaneously. In other embodiments, the first spectrum of light 12 does not cover the entire optical element 30, and the second spectrum of light 212 covers the entire optical element 30, the corresponding zones can appear as the second color and the third color on the optical element 30. In other embodiments, the first spectrum light 12 and the second spectrum light 212 do not cover the entire optical element 30, and the covered areas of the two do not completely overlap, so that the optical element 30 only presents the third color at the intersection of the two, and the first color and the second color are presented at other positions correspondingly, that is, three colors can be presented simultaneously.

It can be seen that, when the first light source 10 operates, the second light source 20 can be controlled to turn on or off to display a second color or a third color different from the color displayed by the first light source 10 on the optical element 30, and since the second light source 20 is located outside the optical path of the first light source 10, the color of the optical element 30 can be changed without any influence on the operation of the first light source 10, so as to provide a prompt message.

In a specific embodiment, the first light source 10 is designed to mainly radiate infrared rays to the outside, and in the prior art, when the infrared light source emits infrared radiation, it is difficult to achieve that only light in the infrared band is emitted and light in the visible band is not emitted, and only the peak of the emission spectrum can be as close to the infrared band as possible, so that the amplitude of red light in the visible band is inevitably the largest, so that the color that can be presented on the optical element 30 is generally red. When the working state of the first light source 10 changes, the spectrum changes, and the peak and/or amplitude is changed, but the color presented on the optical element 30 is still mainly formed by red light in the visible light band, and only the shade or hue of red changes, which is reflected on the optical element 30, is small in color change, so that it is difficult for a user to intuitively know that the working state of the first light source 10 changes from the slight change of color on the optical element 30, that is, the color change brought by the change of the working state of the first light source 10 itself is not enough to provide a prompt message with sufficient resolution for the user. By using the multi-source light mixing device in the embodiment of the present application, when the operating state of the first light source 10 is switched, by controlling the on/off of the second light source 20, for example, the operating state is changed from the off state to the on state, the second spectrum light 212 is synchronously projected to the optical element 30, at least a part of the area on the optical element 30 presents the third color, for example, the second color of the second spectrum light 212 on the optical element 30 is green, the third color formed by mixing the green and the red is yellow, which is significantly different from the first color (red), and a user can know that the operating state of the first light source 10 has changed after observing the yellow.

Therefore, the multi-source light mixing device in the above embodiment mixes light on the optical element 30 to present a predetermined color by the light emitted from the second light source 20 located outside the optical path of the first light source 10 on the premise of not affecting the function of the first light source 10 itself, and can display a color different from that of the first light source 10 on the optical element 30 by controlling the on/off of the second light source 20, so as to provide striking prompt information, so that a user can intuitively and quickly obtain related prompt information by observing the color of the optical element 30 on the first light source 10, thereby improving the convenience in use.

As shown in fig. 1, 5 and 6, in some embodiments, the number of the second light-emitting members 211 is plural, and the direction of each second light-emitting member 211 is designed and the light path thereof is planned, so that the emitted second spectrum light 212 is projected to a predetermined position of the optical element 30, and a plurality of predetermined positions presenting the third color are combined to form a predetermined pattern on the optical element 30. The predetermined pattern shown in fig. 6 is a circular ring, and after the second light-emitting element 211 is turned on, the optical element 30 has a circular ring shape (a white area in the figure) with a third color. In another embodiment shown in fig. 5, the second light emitting elements 211 can be controlled separately, for example, the preset patterns are "a", "B", and "C" (hatched regions in the drawing), the second light emitting elements 211 are divided into three groups, the preset positions corresponding to the first group of second light emitting elements 211 are combined into the pattern "a", the preset positions corresponding to the second group of second light emitting elements 211 are combined into the pattern "B", and the preset positions corresponding to the third group of second light emitting elements 211 are combined into the pattern "C", when the first group of second light emitting elements 211 is turned on and the second group and the third group of second light emitting elements 211 are turned off, the pattern "a" with the third color is presented on the optical element 30, which can indicate that the current operation mode is the first mode, and the patterns "B", "C" with the third color can also be presented on the optical element 30 by a similar control scheme, or any combination of the three, to provide more prompting information to the user. In other embodiments, the second light emitting element 211 may be controlled to switch between on and off at a frequency such that the corresponding predetermined pattern is "blinking" to switch between the first color and the third color to provide another indication. Alternatively, a partitioning and flashing manner may be adopted, such as projecting "a", "B", and "C" all light up in a third color, and the pattern "a" is in a flashing state (turning on and off the second light-emitting element 211 at a certain frequency to switch "a" between the first color and the third color) to provide more information, such as that the gear is selected as an undetermined gear for the current user, or is the current gear, etc. The control structure of the second light emitting elements 211 can be realized by a mature technical scheme in the prior art, and the design of the related logic control circuit is sufficient, and the specific circuit arrangement scheme and the control logic are not the key points of the embodiment and are not described in detail.

In a more specific embodiment, as shown in fig. 12, the plurality of second light-emitting members 211 are disposed around the optical path of the first light source 10, that is, the plurality of second light-emitting members 211 are substantially located at different positions in the circumferential direction (with the central axis of the optical path as the center) after being projected onto the optical element 30, so as to form a substantially annular continuous or discontinuous pattern, which may be, for example, a circular ring shape in fig. 6.

In another embodiment, as shown in fig. 1, the plurality of second light-emitting members 211 are stacked substantially along the optical path direction of the first light source 10, that is, after the light rays of the plurality of second light-emitting members 211 are projected onto the optical element 30, the light rays are substantially located at different positions in the radial direction (with the projection point of the central axis of the optical path as the center of the circle), so as to form a continuous or discontinuous stripe pattern.

In other embodiments, a combination of the two may be used, that is, either a ring pattern or a bar pattern may be projected.

In a specific embodiment, as shown in fig. 1 and 12, a plurality of second light emitting members 211 are provided and are disposed both in a stacked manner in the optical path direction of the first light source 10 and around the optical path of the first light source 10, so that the plurality of second light emitting members 211 can collectively cover the entire surface of the optical element 30. Each of the second light emitting members 211 projects a pixel on the optical element 30, and the plurality of second light emitting members 211 can be combined to form a two-dimensional pattern by the pixel, and the resolution of the two-dimensional pattern is related to the arrangement density of the second light emitting members 211. Moreover, the on-off duration of each second light emitting element 211 is controlled by a related logic control circuit according to a program, so that the display or disappearance time of the color (one of the first color, the second color, and the third color) of each pixel is controlled, the displayed two-dimensional pattern can be presented dynamically, a moving picture or a video can be played on the optical element 30, and the displayable prompt information is further increased.

As shown in fig. 1, in some embodiments, the second light source 20 further includes one or more third light-emitting members 221, the third light-emitting members 221 are located outside the optical path of the first light source 10, and the third light-emitting members 221 emit third spectrum light 222 to the optical element 30; any two or three of the first spectral light 12, the second spectral light 212, and the third spectral light 222 are mixed together at the intersection of the optical element 30 to form a mixed light 40, and present a predetermined color. For example, the first light emitting element 11 is a red light source, the second light emitting element 211 is a blue light source, and the third light emitting element 221 is a green light source, which can provide light of three colors, red, green and blue, the three colors can be mixed in proportion to obtain any other color, and the on/off or power of the second light emitting element 211 and the third light emitting element 221 is controlled by a related circuit, so that the light can be mixed into any color by matching. In addition, the dynamic colorful patterns can be displayed by combining the scheme. The function, arrangement and position of the third light emitting member 221 may be referred to the second light emitting member 211 described above and below, and the difference between the two is only the color, it being understood that any of the second light emitting members 211 described above and below may be replaced with the third light emitting member 221. The third light emitting members 221 and the second light emitting members 211 may be arranged alternately, side by side, and the like, and are not particularly limited.

As shown in fig. 1, in some embodiments, the multi-source light mixing device further includes a dimming structure mounted to the second light source 20, the dimming structure being configured to change the on/off and/or the radiation intensity of the one or more second light emitting elements 211. In one embodiment, the light adjusting structure is a movable light shielding plate, and when moving to different positions, the light shielding plate shields the second light emitting member 211 located at different positions, thereby changing the shape of the light spot projected on the optical element 30. For example, as shown in fig. 6, the effect can be achieved by the dimming structure, and the second light-emitting member 211 corresponding to the central region of the optical element 30 is partially shielded, and the second light-emitting member 211 corresponding to the outer ring portion is not shielded, so that a circular ring pattern of the third color can be presented on the optical element 20. In another embodiment, the light-adjusting structure includes a first portion with a low transmittance and a second portion with a high transmittance, wherein the second portion can be designed to have a certain shape, such as a letter, an icon, a character, etc., when light passes through the light-adjusting structure, a larger proportion of light corresponding to the second portion can penetrate through the second portion, and only a smaller proportion of light corresponding to the first portion can penetrate through the second portion, so that the light-adjusting structure can present a contrast effect after being projected to the outside. For example, the effect shown in fig. 5 can also be achieved by a light control structure, where the shapes "a", "B", and "C" corresponding to the second portion are bright portions, the shapes corresponding to the first portion are dark portions, and the final effect is to present bright spots of "a", "B", and "C" at the projection position to provide the prompt information. In a specific embodiment, a plurality of regions with different light transmittances can be planned on the optical element 30 by arranging different coating films on the optical element 30 in different zones to form a dimming structure.

It is understood that the two embodiments of the light-adjusting structure are not conflicting, and may exist at the same time, for example, a movable light shielding plate is provided, regions with different transmittances are provided on the light shielding plate, and the final bright-spot pattern is projected at different positions on the optical element 30 by the movement of the light shielding plate. For example, when the light shielding plate slides along the second light emitting members 211, the second light emitting members 211 located at different positions are exposed from the light transmitting portion, light corresponding to the positions of the light are projected, and a bright spot corresponding to the shape of the second portion is formed after passing through the light modulating structure, which is equivalent to a movable bright spot pattern on the optical element 30. in a more preferred embodiment, a mark pattern, such as a scale, a plurality of steps, a plurality of function names, and the like, can be formed on the optical element 30 by printing, silk-carving, and the like, the shape of the second portion is set as an arrow, a bright arrow with a striking color is formed correspondingly, and the bright arrow pattern moves on the optical element 30 to indicate different mark patterns along with the movement of the light shielding plate, and providing prompt information.

In some embodiments, as shown in fig. 1, the first light-emitting member 11 and the second light-emitting member 211 are respectively located on both sides of the optical element 30, the first light-emitting member 11 faces the inner end surface 31 of the optical element 30, and the first spectral light 12 is incident from the inner end surface 31 of the optical element 30 and exits from the outer end surface 32 of the optical element 30. The second light emitting member 211 is inclined toward the outer end surface 32 of the optical element 30, and the second spectrum light rays 212 are at least partially reflected at the outer end surface 32 of the optical element 30 and mixed with the first spectrum light rays 12 into mixed light rays 40. It is easy to understand that, for the convenience of description, the side of the optical element 30 facing the first light-emitting member 11 is defined as its inner end surface 31, the end surface corresponding to the inner end surface 31 is located as its outer end surface 32, and the inner and outer are only described differently and do not include other structural or positional meanings.

In this embodiment, the first spectrum light 12 passes through the optical element 30 and exits from the outer end face 32 of the optical element 30, and the optical element 30 mainly transmits the first spectrum light 12. The second spectrum light 212 is at least partially reflected at the outer end surface 32 of the optical element 30, and the reflected second spectrum light 212 is equivalently emitted from the outer end surface 32 of the optical element 30, and the two lights are mixed into the mixed light 40 and present corresponding colors. It will be readily appreciated that second spectrum light 212 is operative to mix only with first spectrum light 12, and thus ideally second spectrum light 212 is totally reflected at outer end face 32 of optical element 30.

To better achieve the above-described effects, in a more specific embodiment, the optical element 30 is configured to: the inner end face 31 has a higher transmittance than the outer end face 32; alternatively, the optical element 30 has a higher transmittance for the first spectrum of light 12 than for the second spectrum of light 212. As is known from the related art, the transmittance and reflectance of a medium are inversely proportional, i.e., the higher the transmittance, the lower the reflectance, and vice versa.

In one embodiment, the optical element 30 is configured such that the inner end surface 31 has a higher transmittance than the outer end surface 32, which can be understood as that the inner end surface 31 of the optical element 30 has a higher transmittance and a lower reflectance for the light in all wavelength bands, and the light enters the optical element 30 from the inner end surface 31 more easily and is not easily reflected, so that the first spectrum light 12 emitted by the first light source 10 can be emitted from the optical element 30 as much as possible to provide the predetermined function; the outer end face 32 of the light source element has a low transmittance and a high reflectance for the light in the full wavelength band, and the light is more easily reflected at the outer end face 32 of the optical element 30 and is not easily incident into the optical element 30, so that the second spectrum light 212 emitted by the second light source 20 can be reflected from the outer end face 32 of the optical element 30 as much as possible and mixed with the first spectrum light 12 emitted from the end face. This embodiment can be achieved by a number of techniques, for example by providing the outer end face 32 of the optical element 30 as a smooth face and the inner end face 31 as a rough face, in both of which the smooth face reflects light more easily and has correspondingly lower transmittance; or coating the optical element 30, and designing film layers with different transmittances to be respectively coated on the inner end surface 32 and the outer end surface 32 of the optical element 30; or, the optical element 30 is formed by laminating a first material with a lower transmittance and a second material with a higher transmittance, and the specific implementation manner is not limited.

In another embodiment, the optical element 30 is configured to have a higher transmittance and lower reflectance for the first spectrum of light 12 and correspondingly a lower transmittance and higher reflectance for the second spectrum of light 212. Therefore, the first spectrum light 12 emitted by the first light source 10 can pass through the optical element 30 and exit as much as possible, and the second spectrum light 212 can be reflected from the surface of the optical element 30 as much as possible, so as to achieve the corresponding light mixing effect. This embodiment can be realized by various techniques, such as manufacturing the optical element 30 with a special material, mixing a material having a specific reflectance with the optical element 30, and the like. In one specific embodiment, as shown in fig. 4, a film layer having a predetermined transmission curve is designed on the optical element 30, a curve c is a transmission curve of the optical element 30, a curve a is a waveform of the first spectrum light 12, and a curve b is a waveform of the second spectrum light, and it can be seen from the graph that the peak of the first spectrum light 12 is located in a transmission interval of the optical element 30 and can directly pass through the optical element 30, and the peak of the second spectrum light 212 is located in an impermeable interval of the optical element 30 and is difficult to pass through the optical element 30 and be reflected by the optical element 30.

In some embodiments, as shown in fig. 2, the first light-emitting member 11 and the second light-emitting member 211 are located on the same side of the optical element 30, the first light-emitting member 11 and the second light-emitting member 211 are both directed toward the inner end surface 31 of the optical element 30, and the first spectral light ray 12 and the second spectral light ray 212 are both incident from the inner end surface 31 of the optical element 30 and exit from the outer end surface 32 of the optical element 30 to form the mixed light ray 40. In this embodiment, both the first spectrum of light 12 and the second spectrum of light 212 are transmitted through the optical element 30. The second light emitting member 211 is located at the rear side of the light emitting direction of the first light emitting member 11, and can avoid blocking the light path of the first light emitting member 11. In a specific application, the plurality of second light emitting members 211 may be annularly arranged such that the first light emitting member 11 is located in the middle of the plurality of second light emitting members 211 to avoid blocking the second spectrum light 212. Or a plurality of second light emitting members 211 are directly arranged at the rear side of the first light emitting member 11, so that the light rays of the second light emitting members 211 are not completely shielded.

In some embodiments, as shown in fig. 3, optical element 30 includes an inner end surface 31, an outer end surface 32, and a lateral end surface 33, and second light source 20 enters light from lateral end surface 33 of optical element 30. A reflection structure 34 is provided inside the optical element 30, and the reflection structure 34 reflects light incident from the side end surface 33 and emits the light from the outer end surface 32. The first light emitting element 11 faces the inner end surface 31, and the first spectral light rays 12 enter from the inner end surface 31 and exit from the outer end surface 32. Second light source 20 faces side end surface 33, and second spectral light 212 enters from side end surface 33, is reflected by reflective structure 34, and then exits from outer end surface 32.

In this embodiment, both first spectrum light 12 and second spectrum light 212 can be emitted from outer end surface 32 and mixed by reflective structure 34 provided inside optical element 30. Therefore, the second light source 20 may be disposed laterally of the optical element 30, and the light emitting direction is toward the optical path of the first light source 10, i.e., the optical path axis of the second light source 20 is substantially perpendicular to the optical path axis of the first light source 10. The multi-source light mixing device is provided with the second light source 20 in such a way, the length in the axial direction is reduced, the overall size of the multi-source light mixing device is more compact, and the light path is easier to plan. In addition, the first spectrum light 12 and the second spectrum light 212 can exit the optical element 30 through parallel light paths to form the mixed light 40 with better parallelism and better color consistency.

The reflecting structure 34 provided inside the optical element 30 is an optical structure capable of changing side incident light into light emitted toward the outer end surface 32, and the reflecting surface direction can be determined by the optical path design according to the reflection theorem, and the reflecting structure 34 can be configured by providing the reflecting surface inside the optical element 30. For convenience of description, as shown in fig. 3, in this example, when the direction of the light path of the first light source 10 is 0 °, the light path of the second light source 20 is 90 °, and the reflection surface is set to be 45 °, it is possible to reflect the light of the second light source 20 to be parallel to the light of the first light source 10. It is to be understood that the above description of degrees is merely for ease of description and that a range of fluctuations should be allowed in practice.

In a particular embodiment, the reflective structure 34 is a plurality of waveguide layers obliquely disposed within the optical element 30, the plurality of waveguide layers configured to: the waveguide layer has a higher transmittance for the first spectrum of light 12 than the second spectrum of light 212. In the optical path diagram shown in fig. 3, the waveguide layer has high transmittance and low reflectance for the first spectrum light 12, so that the first spectrum light 12 can directly transmit after entering the waveguide layer, and cannot be changed in direction, and the waveguide layer has low transmittance and high reflectance for the second spectrum light 212, so that a larger proportion of the second spectrum light 212 after entering is reflected on the waveguide layer to change the optical path direction, so that the second spectrum light 212 is reflected on the premise of not blocking the first spectrum light 12, so that the second spectrum light is in the same direction and parallel with the optical path of the first spectrum light 12, and finally exits in parallel from the optical element 30 after mixing to realize light mixing.

The waveguide structure is a structure capable of directionally guiding the light wave to propagate along a predetermined direction, and in this embodiment, the obliquely arranged waveguide structure constitutes the above-mentioned reflection surface, and reflects and guides the second spectral light 212 entering from the side to exit from the outer end surface 32. The waveguide structure is an optical structure known to those skilled in the art, and can be widely applied to guiding scenes with various wavelengths, and can be implemented by structures such as surface treatment and coating, and the specific implementation manner is not described in detail.

In some embodiments, as shown in fig. 3 and 7, the optical element 30 includes a plurality of unit bodies 35, the unit bodies 35 have inclined end surfaces, the inclined end surfaces between adjacent unit bodies 35 are abutted against each other, and a waveguide layer is provided on at least one of the two inclined end surfaces abutted against each other to constitute the reflecting structure 34. That is, as shown in fig. 3, the reflective structure 34 can also be understood as a junction between adjacent unit cells 35. The inclined end faces of the unit bodies 35 can be coated, and the transmission curves of the film layers are set in a targeted mode, so that the effects of transmission of the first spectrum light 12 and reflection of the second spectrum light 212 can be achieved. In the embodiment shown in fig. 7, the optical element 30 is circular and has a plurality of annular unit bodies 35, which are sequentially nested, and the second light source 20 may be arranged in the middle of the annular unit body or in the outer portion of the annular unit body according to the specific arrangement, and the inclination direction of the reflection structure 34 may be arranged according to the corresponding position. In other embodiments, not specifically shown, the optical element 30 may have other shapes, such as a rectangular parallelepiped, a cube, an irregular three-dimensional structure, etc., and the aforementioned reflective structure 34 may be formed by splicing a plurality of unit cells 35 and providing corresponding reflective surfaces on the joined oblique end surfaces.

As shown in fig. 1 to 14, in one embodiment of the present application, there is further provided a drying apparatus 50, including a housing 53 and the aforementioned multi-source light mixing device. The housing 53 has a first opening, the first light source 10 is installed in the housing 53 and faces the first opening, the first spectrum light 12 which can be emitted by the first light-emitting element 11 is infrared radiation, and the infrared radiation is emitted from the first opening and then irradiates a target object outside the housing 53, so that the purpose of drying is achieved by radiating heat to the target object.

It is easily understood that the drying apparatus 50 includes the aforementioned multi-source light mixing device, and in order to avoid redundancy of characters, the drying apparatus 50 has all the structures and related technical effects described above even though not described below.

Specifically, the first light emitting element 11 may employ an infrared LED, a halogen lamp, a laser infrared light source, or the like. The light emitted by the infrared light source in the prior art is generally red, and when the drying device 50 adjusts the emission power (i.e., switches the operating mode of the drying device 50), for example, the emission power of the first light emitting element 11 is increased, the heating efficiency is increased, or the emission power is decreased, the heating efficiency is decreased, the amplitude of the first spectrum light 12 is changed, and the wavelength corresponding to the visible light band is not changed accordingly, so that the color presented on the optical element 30 may only have a change of the red brightness, but not be changed into other colors, and therefore it is difficult for a user to know whether the emission power of the drying device 50 is changed or not by directly observing the color of the optical element 30. The drying device 50 in the embodiment of the present application is further provided with the second light source 20, and when the first light source 10 is controlled, the on/off or the power of the second light source 20 is synchronously controlled, and the second spectrum light 212 is projected on the optical element 30 to form the mixed light 40, so that the color different from red is displayed, and a striking prompt message is provided, so that a user can know that the emission power of the first light source 10 is changed by directly observing the color of the optical element 30 of the drying device 50. For example, the corresponding color of the second spectrum light 212 on the optical element 30 is green, and appears yellow after being mixed with red, and the color of yellow is obviously different from that of red, so that the user can obtain the corresponding prompt information by observing the yellow appearing on the optical element 30.

In one specific embodiment, the first light source 10 high power state is defined as red color appearing on the optical element 30, the first light source 10 low power state is defined as yellow color appearing, and the second light source 20 is defined as the off state by default. When the first light source 10 is controlled to switch from the high power state to the low power state, the second light source 20 is switched to the operating state in response to the switching signal, and the second spectrum light 212 is emitted and then mixed at the light emitting surface of the optical element 30, so that at least a partial area of the optical element 30 is switched from red to yellow (the specific color mixing principle is described in detail above), and the user can know that the drying device 50 has switched the first light source 10 to the low power state at this time after observing the yellow. On the contrary, when the first light source 10 is controlled to switch from the low power state to the high power state, the second light source 20 is synchronously controlled to be turned off, the yellow color of the optical element 30 disappears and appears red, and the user can know that the first light source 10 is switched to the high power state. The current operation mode of the drying apparatus 50 can be known at any time by the color of the optical element 30 during the use process of the user, so that the user can conveniently use the drying apparatus 50 in a proper manner.

As can be seen from the above, the drying device 50 in the above embodiment can mix the light from the second light source 20 and the first light source 10, present a color different from and striking from the light of the first light source 10 on the light emitting surface of the optical element 30, and provide a prompt message by color conversion to prompt the user.

In some embodiments, as shown in fig. 1 to 3, the first light source 10 includes one or more lamp cups 13, a first light emitting member 11 is disposed inside each lamp cup 13, the lamp cup 13 has a second opening, and an optical element 30 is disposed at the second opening. The lamp cup 13 can collect the light emitted from the first light-emitting component 11 and emit the light from the second opening. The optical element 30 is arranged at the second opening closing the lamp cup 13. In some embodiments, the first light source 10 has a single optical element 30 and a plurality of lamp cups 13, and one optical element 30 is simultaneously closed at the second openings of the plurality of lamp cups 13. In some embodiments, the first light source 10 has a plurality of optical elements 30 and a plurality of lamp cups 13, and an optical element 30 is disposed at the second opening of each lamp cup 13. It should be understood that no matter which optical element 30 is used, the light mixing process described above and below is not affected, and in the related description, unless otherwise specified, it should be understood that both structures (split type and integral type) of the optical element 30 are applicable.

As shown in fig. 1 to 3 and fig. 8 to 11, in some embodiments, the second opening is disposed at the first opening, that is, the light-emitting surface of the lamp cup 13 is also the light-emitting surface of the drying device 50, so that the optical element 30 is actually sealed at the first opening of the housing 53, which facilitates the user to visually observe the color of the optical element 30. In other embodiments, the second opening may be offset from the first opening, for example, the second opening is located inside the housing 53 and the optical element 30 is correspondingly located inside the housing 53, or the lamp cup 13 extends out of the first opening of the housing 53, the second opening is located outside the housing 53 and the optical element 30 is correspondingly located outside the housing 53.

In some embodiments, as shown in fig. 2 and 8, the second light-emitting member 211 is located inside the lamp cup 13, specifically between the first light-emitting member 11 and the inner wall of the lamp cup 13, and the second light-emitting member 211 and the corresponding first light-emitting member 11 have parallel light paths. That is, the second light emitting element 211 is disposed between the other end of the light emitting surface of the first light emitting element 11 and the lamp cup 13, and the second light emitting element 211 is located behind the first light emitting element 11, so that the second light emitting element 211 is located outside the light path of the first light source 10 and can emit the second spectrum light 212 to the optical element 30, and at this time, the first spectrum light 12 and the second spectrum light 212 have substantially the same light path and transmit through the optical element 30 and exit together, thereby realizing light mixing. In this embodiment, the drying apparatus 50 is not provided with the separate second light source 20, which is equivalent to integrating the first light source 10 and the second light source 20, and contributes to saving the internal space.

In other embodiments, as shown in fig. 1 and 8, the second light source 20 may be located outside the lamp cup 13, and the arrangement is rationalized such that the second light source 20 located outside the lamp cup 13 neither blocks the optical path of the first light source 10, but also directs the second spectrum light 212 emitted from the optical element 30. In this embodiment, since the second light source 20 is a separate structure externally arranged with respect to the first light source 10, that is, the first light source 10 itself does not need to be modified, so that light mixing can be performed in response to various kinds of the first light sources 10.

In a more specific embodiment, as shown in fig. 8, the second light source 20 is mounted inside or outside the housing 53 and is tilted and directed toward the optical element 30, and the light path can be understood in the manner shown in fig. 1. In particular, in the embodiment where the second light source 20 is located outside the housing 53, a relevant protruding structure may be provided outside the second opening of the housing 53 for mounting the second light source 20 and directing the second light source 20 towards the optical element 30 on the second opening. In the embodiment where the second light source 20 is located inside the housing 53, the housing 53 may be opened at the second opening to provide a larger inner dimension, such that a space for mounting the second light source 20 is reserved between the optical path of the infrared radiation and the inner wall of the housing 53, and the second light source 20 is mounted on the inner wall in an inclined manner and directed toward the optical element 30.

In one embodiment, as shown in fig. 12, a gap is provided between the outer side of the optical element 30 and the housing 53, and the second light source 20 is mounted in the gap. The second light source 20 is also disposed inside the housing 53, so that the uniformity of the appearance of the drying apparatus 50 is better, the user does not observe the additional second light source 20 at the outside, and the second light source 20 disposed in the gap does not obstruct the light path of the first light source 10.

In another embodiment, as shown in fig. 8 and 9, a notch is provided inside the optical element 30, and the notch penetrates the optical element 30 to communicate the inside and the outside of the housing 53. The second light source 20 can be disposed in the gap to avoid blocking the light path of the first light source 10, and to ensure the drying apparatus 50 to have a better appearance consistency.

In some more specific embodiments, as shown in fig. 3, 8, 9, 10, 11, 12, the optical element 30 includes an inner end surface 31, an outer end surface 32, and a side end surface 33, and the second light source 20 enters light from the side end surface 33 of the optical element 30. The optical element 30 is provided with a reflection structure 34 inside, and the reflection structure 34 is used for reflecting the light entering from the side end face 33 and then emitting the light from the outer end face 32. The first light emitting element 11 faces the inner end surface 31, and infrared radiation enters from the inner end surface 31 and exits from the outer end surface 32. Second light source 20 faces side end surface 33, and second spectral light 212 enters from side end surface 33, is reflected by reflective structure 34, and then exits from outer end surface 32. In the embodiment shown in fig. 12 and 11, the optical element 30 is disposed with a gap between the outside and the housing 53, and the end surface facing the gap constitutes the side end surface 33, and the second light source 20 is disposed in the gap and faces the side end surface 33 of the optical element 30, so that light can be introduced from the side end surface 33. In the embodiment shown in fig. 10, when the optical element 30 is provided with a notch, the inner wall of the notch forms the side end surface 33, or the side end surface 33 surrounds the notch to form the notch, and the second light source 20 is provided in the notch so as to face the side end surface 33 of the optical element 30, that is, light can be incident from the side end surface 33.

In this embodiment, both the infrared radiation and second spectrum light 212 can be made to exit from outer end face 32 for mixing by reflective structure 34 disposed within optical element 30. Therefore, the second light source 20 may be disposed laterally of the optical element 30 with the light emitting direction facing the optical path of the first light source 10, and the optical path axis of the second light source 20 is substantially perpendicular to the optical path axis of the first light source 10. By adopting the second light source 20 with the arrangement mode, the length of the drying device 50 in the axial direction is not increased, so that the whole size of the drying device 50 is more compact, the light path is easier to plan, the second spectrum light 212 can be emitted out of the optical element 30 in parallel with the infrared radiation to perform color mixing, the light consistency after color mixing is good, and compared with the scheme that the second spectrum light 212 is reflected on the outer end face 32 of the optical element 30, because the second spectrum light 212 is emitted out in parallel with the infrared radiation, the similar color mixing effect can be observed at all observation angles.

The reflection structure 34 provided inside the optical element 30 is an optical structure capable of changing side incident light into light emitted toward the outer end surface 32, and can be realized by designing an optical path and determining the direction of a reflection surface according to the reflection theorem, and then providing a corresponding radiation surface inside the optical element 30. For convenience of description, in this example, the optical path direction of the first light source 10 is 0 °, the optical path direction of the second light source 20 is 90 °, the reflection surface of the reflection structure 34 is set to be 45 °, and the reflection optical path is as shown in fig. 3.

In particular, the reflecting structure 34 is a plurality of waveguide layers obliquely arranged inside the optical element 30, the plurality of waveguide layers being configured to: compared with the second spectrum light 212, the waveguide layer has a higher transmittance for the first spectrum light 12 (i.e. infrared radiation), as shown in the light path diagram of fig. 3, the waveguide layer has a high transmittance and a low reflectance for the infrared radiation, so that the first spectrum light 12 can directly transmit after entering the waveguide layer without being changed in direction, and the waveguide layer has a low transmittance and a high reflectance for the second spectrum light 212, so that a larger proportion of the second spectrum light 212 is reflected on the waveguide layer to change the light path direction, and is parallel to the light path of the infrared radiation, and finally the two are mixed and emitted in parallel from the optical element 30, thereby realizing light mixing. The waveguide structure is a structure capable of directionally guiding the light wave to propagate along a predetermined direction, and in this embodiment, the obliquely arranged waveguide structure constitutes the above-mentioned reflection surface, and reflects and guides the second spectral light 212 entering from the side to exit from the outer end surface 32. The waveguide structure is an optical structure known to those skilled in the art, and is widely applied to guiding scenes of various wavelengths, and the specific implementation of the structure is not described in detail.

In some embodiments, as shown in fig. 3 and 7, the optical element 30 includes a plurality of unit cells 35, the unit cells 35 having slanted end faces provided with a waveguide layer to constitute the reflecting structure 34. The inclined end surfaces of the adjacent unit bodies 35 are closely attached to each other, and a waveguide layer is provided on any one of the two inclined end surfaces closely attached to each other. That is, as shown in fig. 3, the reflective structure 34 can also be understood as a junction between adjacent unit cells 35. When the inclined end face of the unit body 35 is coated, the transmission curve of the film layer can be set in a targeted manner, so that the effect of transmitting the first spectrum light 12 and reflecting the second spectrum light 212 can be realized. It is easily understood that, in the embodiment shown in fig. 7, the optical element 30 is circular and has a plurality of annular unit bodies 35, which are sequentially nested, and the second light source 20 is disposed at the middle of the annular optical element 30 in combination with the embodiments shown in fig. 8, 9 and 10, or the second light source 20 is disposed at the outer portion of the annular optical element in combination with the embodiments shown in fig. 11 and 12.

It is easily understood that in the embodiment where there is a gap between the optical element 30 and the housing 53 or the optical element 30 is provided with a notch, it is preferable to dispose the second light source 20 toward the side end face 33 of the optical element 30, but not necessary, in both embodiments, the second light source 20 may be disposed obliquely toward the inner end face 31 or the inner end face 32 of the optical element 30, and details are not repeated.

In a specific embodiment, as shown in fig. 8 to 14, the drying apparatus 50 further comprises a wind power assembly 51, the wind power assembly 51 is mounted in a housing 53, and is capable of generating an air current, and an air current outlet 52 is provided at the first opening. The wind power assembly 51 may include a motor, a blade, etc., and operates to generate an air current after being supplied with current, and the air current is blown out of the housing 53 through the air current outlet 52, and the air current and the infrared radiation generated by the first light source 10 act on an external target object together to synergistically improve the drying effect. For example, the target object is hair, after the drying device 50 is turned on, infrared radiation irradiates the hair to form a spot and generate heat, and the airflow output by the wind power assembly 51 blows the hair to increase the air flow speed, so that the two cooperate to achieve the moisture of the hair for quick drying.

As shown in fig. 13, the airflow outlet 52 may be located at one side of the optical element 30, that is, at the first opening, a part of the area radiates light outwards, and another part of the area outputs airflow outwards. As shown in fig. 8 and 9, the airflow outlet 52 may be opened inside the optical element 30, that is, at the first opening, the outer annular region outputs the radiation light outwards, and the central region outputs the airflow outwards. As shown in fig. 12, the optical element 30 may also be located inside the airflow outlet 52, i.e. at the first opening, the outer annular region outputs the airflow outwards, and the central region outputs the radiation outwards. It will be readily appreciated that the airflow outlet 52 need not be a solid structure with a particular structure and location, but rather, an area through which air can pass is reserved at the first outlet and the airflow inside the housing 53 is directed to the area for outputting the airflow from the housing 53, which area can be considered as the airflow outlet 52. In other words, when the optical element 30 is installed at the first opening and has a smaller area than the first opening, the airflow outlet 52 through which the airflow can pass is present, so that the user can keep the first opening facing the target object during the use of the drying apparatus 50, i.e. the drying can be realized by the airflow and the infrared radiation acting on the target object. As is apparent from the above description, the air flow outlet 52 is not necessarily covered by the optical element 30, and the light travels in a straight line, so that the second light source 20 can be disposed at the air flow outlet 52, thereby ensuring complete avoidance of the optical path of the first light source 10.

In some embodiments, the drying device 50 is not provided with the wind power assembly 51, and a gap formed on the optical element 30 or a gap between the optical element and the housing 53 may be only used as a position where the second light source 20 is disposed. In some embodiments, the drying device 50 is provided with a wind power assembly 51, and the gap formed in the optical element 30 or the gap formed between the optical element 30 and the housing 53 forms an airflow outlet 52, wherein the gap formed in the optical element 30 and the airflow outlet 52 are equivalent to the schemes shown in fig. 8 and 9, the gap formed between the optical element 30 and the housing 53 and the airflow outlet 52 are equivalent to the schemes shown in fig. 12 and 13, and the second light source 20 is installed in the airflow outlet 52.

The first light source 10 in the drying apparatus 50 may be a single integral structure or may be composed of a combination of a plurality of structures. In one embodiment, as shown in fig. 8 to 11, the first light source 10 includes a plurality of lamp cups 13, each of the lamp cups 13 has a first light emitting device 11, and the plurality of first light emitting devices 11 emit light and then emit infrared rays to the outside to dry. In this embodiment, the plurality of lamp cups 13 may be fixed to each other or may be fixed to the housing 53. Between the lamp cup 13 and the housing 53, or between the lamp cup 13 and the lamp cup 13, a space is reserved as an air flow outlet 52, or for mounting the second light source 20.

Accordingly, the optical element 30 may include a plurality of portions, each of which covers a respective one of the lamp cups 13, and may or may not be fixed to each other; the optical element 30 may also be a whole body, and cover a plurality of lamp cups 13 at the same time, the specific design manner of the optical element 30 only affects the related assembly and installation, and does not affect the light mixing implementation process in various embodiments, and the following related description does not discuss these two arrangement manners separately. In either case, it will be readily understood that the optical element 30 has a plurality of regions, each corresponding to a respective one of the lamp cups 13. When each first light-emitting member 11 emits light, a plurality of light spots are formed on the optical element 30 as indicated by the dashed line boxes in fig. 9, and the brightness of the central portion of each light spot is larger and the brightness of the edge is smaller.

Specifically, in the embodiment shown in fig. 8, 9 and 10, the plurality of lamp cups 13 are distributed in a ring shape, and the optical element 30 is correspondingly notched to form the airflow outlet 52, so that the airflow can flow out from the middle of the plurality of lamp cups 13 and act on the external target together with the infrared radiation. The second light source 20 is disposed at the airflow outlet 52 and includes a plurality of second light-emitting members 211, each second light-emitting member 211 corresponds to an optical path facing the first light source 10, that is, the second light-emitting members 211 correspond to the first light-emitting members 11 one by one, and a group of the first light-emitting members 11 and the second light-emitting members 211 corresponding to each other can perform color mixing in a corresponding area (for example, an area indicated by a dotted line in fig. 9) on the optical element 30 to provide a prompt message. It is easy to understand that the plurality of first light-emitting elements 11 and the plurality of second light-emitting elements 211 can be designed to be controlled independently, that is, different colors can be displayed in different areas on the optical element 30, so that more color schemes can be displayed on the optical element 30, and the specific color mixing process is described above and will not be described herein again. In addition, the plurality of areas can emit light independently and mix colors, so that more prompt information can be provided in a comparative manner, for example, if a user observes that a color of a certain area on the optical element 30 is obviously different from that of other areas during the use of the drying device 50, the user can quickly find that the first light-emitting member 11 or the second light-emitting member 211 corresponding to the area may have a fault.

In the embodiment shown in fig. 11, the plurality of lamp cups 13 are distributed in a ring shape, the middle portion surrounds the airflow outlet 52, a gap is left between the outer edge of the plurality of lamp cups 13 and the housing 53, the second light source 20 is disposed in the gap, and each second light-emitting member 211 faces each first light-emitting member 11 correspondingly, and independent color mixing of each area can be realized by separate control. Compared with the embodiments shown in fig. 8 to 10, the embodiment has substantially the same technical effect, that is, the first light-emitting members 1111 are matched to independently mix colors on the optical element 30, and the difference between the two embodiments is that in the embodiments shown in fig. 11 and 12, the second light source 20 is not arranged in the air duct, so that no resistance is generated to the air flow.

It is easily understood that in other embodiments, the structure shown in fig. 11 and 12 may be modified to have the air outlet at the gap between the plurality of lamp cups 13 and the housing 53, and the area surrounded by the middle portion is used as the position for placing the second light source 20. Alternatively, the second light sources 20 are disposed in the gaps and the areas surrounded by the gaps, and the air outlets are formed, so that the air flow flows through the second light sources 20 and then flows out of the housing 53.

In a more specific embodiment, as shown in fig. 8 and 10, the second light source 20 is arranged in the airflow outlet 52, and a flow-guiding structure (not shown) for reducing wind resistance is provided at a side of the second light source 20 located upstream in the airflow (i.e. a side facing the wind power assembly 51). In order to reduce the obstruction of the second light source 20 to the air flow, in this embodiment, a flow guiding structure, specifically, a structure such as a wind guiding fin or a smooth curved surface, is disposed on the side of the second light source 20 facing the wind power assembly 51 to reduce the wind resistance.

In some embodiments, as shown in fig. 1 and 8, the second light source 20 has a plurality of second light-emitting members 211 and a plurality of third light-emitting members 221, the second light-emitting members 211 can emit light rays 212 of the second spectrum, and the third light-emitting members 221 can emit light rays 222 of the third spectrum. The second light source 20 is capable of projecting at least two lights having different colors, and after being projected onto the optical element 30, the lights are mixed with the infrared radiation light, and the mixture shows more color combinations. According to the related art, the infrared radiation of the first light source 10 is generally red on the optical element 30, so that the second light-emitting member 211 and the third light-emitting member 221 can project yellow and blue on the optical element 30, i.e. three primary colors can be provided, and theoretically any color can be mixed and displayed. By planning the position and edge contour of the projected color, a pattern of any color can be displayed on the optical element 30 of the drying device 50, so that richer prompt information is provided, and related display schemes and principles are described above and are not described herein again.

In some embodiments, which are not specifically shown, the second light emitting element 211 is located inside the housing 53, and the second light source 20 further includes a light guiding structure (not shown) for guiding light, wherein the light guiding structure has a light inlet end facing the second light emitting element 211 and a light outlet end extending toward the optical element 30. The light guide structure is a structure capable of guiding light to propagate along a non-straight line, such as an optical fiber, a waveguide, etc., and after the light guide structure is disposed, the position of the second light emitting element 211 is more flexible, for example, the second light emitting element 211 may be disposed inside the housing 53, and the light guide structure extends through the airflow outlet 52 and is located outside the housing 53, and faces the optical element 30, so as to guide and project the light emitted by the second light emitting element 211 to the optical element 30. The light guide structure itself occupies a small space, is more easily disposed at a position, and enables the second light source 20 not to be limited by a light path, and the related electrical structure is also more easily disposed, and can be disposed at a more flexible position without increasing the axial or radial size of the drying apparatus 50. In particular, in the drying apparatus 50 having the wind power module 51, the light guide structure is led out from the air duct, and the light guide structure itself has a small resistance to the air flow, so that the obstruction to the air flow can be reduced as much as possible.

As shown in fig. 14, the drying apparatus 50 further includes: a main control unit 54 and a display unit 55, wherein the main control unit 54 is used for outputting a control signal to control the operating state of the first light source 10, and the main control unit 54 can respond to an external key operation, a wireless or wired signal input, an internal program control, etc. to output a corresponding control signal to control the operating state of the first light source 10, for example, to switch to a high power state and a low power state. In addition to the first light source 10 responding to the control signal, the display unit 55 also responds to the control signal synchronously, controls the on/off and/or output power of the second light source 20 based on the preset control logic, and changes or displays the color on the optical element 30 by projecting the second spectrum light 212 as a prompt message, so that the user can quickly confirm the operation state of the drying device 50. The display unit 55 is a structure common in the prior art and may be formed by a reasonably designed driving circuit, and the related circuits are designed to respond to the input electrical signal and output a corresponding electrical signal, so as to respond to the control signal according to a preset corresponding rule and control the on/off or output power of the plurality of light sources.

For example, the control signal controls the operating state of the first light source 10 to be switched from the low-power state to the high-power state, the display unit 55 controls the second light source 20 to be switched from the off state to the on state in response to the signal and projects the second spectrum light 212 with a larger power, the second spectrum light 212 presents green light on the optical element 30 alone, and presents yellow after being mixed with the infrared radiation of the first light source 10, and after a user observes that the color on the optical element 30 is changed from red (without turning on the second light source 20) to yellow, the user can know that the current operating state of the first light source 10 is switched from the low-power state to the high-power state, so that the user can intuitively observe the color of the optical glass to obtain the prompt information for switching the operating state.

In a more specific embodiment, the wind power assembly 51 of the drying apparatus 50 is also controlled by the main control unit 54, the control signal output by the main control unit 54 also includes a command for adjusting the power of the wind power assembly 51, and the display unit 55 can also adjust the second light source 20 according to the control signal for the wind power assembly 51. For example, when the drying device 50 is operated, the power of the wind power assembly 51 is adjusted from low to high, so that the user may not confirm the current working state of the wind power assembly 51 from the feeling of the wind power, and the wind power itself cannot be observed by human eyes, and at this time, the color on the optical element 30 can be changed as related prompt information by turning on and off the second light source 20, so as to inform the user of the current working state of the wind power assembly 51.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

Although embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A multi-source light mixing device, comprising:

a first light source comprising an optical element and one or more first light-emitting members capable of emitting light of a first spectrum through the optical element;

the second light source is positioned outside the first light source optical path and comprises one or more second light-emitting pieces, and the second light-emitting pieces can emit second spectrum light rays to the optical element;

the first spectrum light and the second spectrum light are mixed at the intersection of the first spectrum light and the second spectrum light on the optical element to present a preset color;

the optical element comprises an inner end surface and an outer end surface, and the first light-emitting piece and the second light-emitting piece are respectively positioned on two sides of the optical element; or the like, or, alternatively,

the optical element comprises an inner end face, an outer end face and a side end face, the first light-emitting piece faces the inner end face, and the second light-emitting piece faces the side end face; or the like, or, alternatively,

the second light-emitting member is located the rear side in first light-emitting member light-emitting direction, and the annular arranges a plurality ofly the second light-emitting member, so that first light-emitting member is located a plurality ofly the middle part of second light-emitting member.

2. The multi-source light mixing device according to claim 1,

the first light-emitting component faces the inner end face, and the first spectrum light rays are incident from the inner end face and emergent from the outer end face;

the second luminescent member is inclined toward the outer end face where the second spectral light is at least partially reflected and mixed with the first spectral light.

3. The multi-source light mixing device of claim 2, wherein the optical element is configured to:

the inner end surface has a higher transmittance than the outer end surface; or

The optical element has a higher transmittance for the first spectrum of light than for the second spectrum of light.

4. The multi-source light mixing device according to claim 2, wherein the number of the second light emitting elements is plural, and each second light emitting element emits the second spectrum light to a predetermined position of the optical element;

on the optical element, a plurality of preset positions are combined to form a preset pattern.

5. The multi-source light mixing device according to claim 1, wherein a reflection structure is arranged inside the optical element, and the reflection structure is used for reflecting the light rays entering from the side end face and then emitting the light rays from the outer end face;

the second light-emitting piece faces the side end face, and the second spectrum light enters from the side end face, is reflected by the reflecting structure and then exits from the outer end face.

6. The multi-source light mixing device according to claim 5, wherein the reflecting structure is a plurality of waveguide layers obliquely disposed inside the optical element, the plurality of waveguide layers being configured to: the waveguide layer has a higher transmittance for the first spectrum of light than for the second spectrum of light.

7. The multi-source light mixing device according to claim 6, wherein the optical element comprises a plurality of unit bodies, each unit body has an inclined end surface, the inclined end surfaces between adjacent unit bodies are tightly attached to each other, and the waveguide layer is arranged on at least one inclined end surface between two tightly attached inclined end surfaces.

8. The multi-source light mixing device according to any one of claims 1 to 7, wherein a plurality of the second light emitting members are disposed around the optical path of the first light source, and/or a plurality of the second light emitting members are stacked along the optical path of the first light source.

9. The multi-source light mixing device according to any one of claims 1 to 7, wherein the second light source further comprises one or more third light emitting elements, the third light emitting elements are located outside the optical path of the first light source, and the third light emitting elements are capable of emitting a third spectrum of light to the optical element;

and any two or three of the first spectrum light, the second spectrum light and the third spectrum light are mixed together at the intersection of the optical element to present a preset color.

10. The multi-source light mixing device according to any one of claims 1 to 7, further comprising a dimming structure mounted to the second light source, the dimming structure configured to enable variation of on/off and/or radiation intensity of one or more of the second light emitting elements.

11. Drying apparatus comprising a housing and the multi-source light mixing device of claim 1; the shell is provided with a first opening, the first light source is arranged in the shell and faces the first opening, and the first spectrum light emitted by the first light emitting piece is infrared radiation.

12. The drying apparatus of claim 11, wherein the first light source comprises one or more lamp cups, the first light emitter being disposed inside each of the lamp cups, the lamp cups having a second opening, the optical element being disposed at the second opening.

13. Drying apparatus according to claim 12, in which the second light emitter is located outside the lamp cup and is inclined towards the optical element.

14. The drying apparatus of claim 12, wherein said second light emitter is positioned inside said lamp cup and mounted between said first light emitter and an inner wall of said lamp cup;

the second light emitting element and the first light emitting element have parallel light paths inside the lamp cup.

15. Drying apparatus according to claim 11, characterised in that there is a gap between the outside of the optical element and the housing and/or that there is a gap inside the optical element;

the second light source is mounted to the gap and/or the indentation.

16. The drying apparatus of claim 15, wherein the optical element has an inner end face, an outer end face, and a side end face; the side end face faces the gap, and/or the side end face is enclosed to form the notch; a reflection structure is arranged in the optical element and used for reflecting light rays incident from the side end face and then emitting the light rays from the outer end face;

the first light source faces the inner end face, and the first spectrum light rays are incident from the inner end face and emergent from the outer end face;

the second light source faces the side end face, and the second spectrum light enters from the side end face, is reflected by the reflecting structure and then exits from the outer end face.

17. The drying apparatus according to claim 11, further comprising:

the wind power assembly is arranged in the shell and can generate airflow;

the first opening is provided with an airflow outlet, the airflow outlet is positioned at one side of the optical element, or the airflow outlet is arranged in the optical element, or the optical element is positioned in the airflow outlet;

the second light source is mounted at the airflow outlet and faces the optical element.

18. The drying apparatus according to claim 17, wherein the first light source includes a plurality of lamp cups, the first light-emitting member being provided in each of the lamp cups, the plurality of lamp cups being distributed in a ring shape;

the annular centers of the plurality of lamp cups form the airflow outlet; or a gap is arranged between the outer side of the first light source and the shell and forms the airflow outlet;

the second light source comprises a plurality of second light-emitting pieces, and each second light-emitting piece is arranged at the airflow outlet and correspondingly faces to the light path of each first light-emitting piece.

19. Drying apparatus according to claim 18 in which the side of the second light source upstream of the airflow is provided with a flow directing arrangement for reducing wind resistance.

20. The drying apparatus of claim 11, wherein the second light source includes a light guide structure for guiding light, the second light emitter being located inside the housing;

the light inlet end of the light guide structure faces the second light emitting piece, and the light outlet end of the light guide structure faces the optical element.

21. The drying apparatus according to any one of claims 11 to 20, further comprising:

the main control unit is used for outputting a control signal to control the working state of the first light source;

and the display unit is used for responding to the control signal to control the on/off and/or the output power of the second light source.