TW201420966A - Illumination device - Google Patents

Abstract

An illumination device includes a main body, at least one light source, and an optical filter structure. The light source is disposed in the main body for emitting light. The optical filter structure is disposed in a position of the main body where covers the light source for filtering light emitted by the light source, of which the wavelength is within an infrared wavelength band.

Description

Lighting device

The invention relates to a lighting device, in particular to a lighting device which uses a filter film structure to filter out light emitted by a light source and having a wavelength in the infrared band.

At present, the common lighting devices can be mainly divided into two types: a bulb type and a light guiding rod type. A bulb-type illuminating device generally uses a bulb holder for mounting a light source (such as a light emitting diode (LED), etc.) and has a light-transmitting bulb cover attached thereto for protecting the light source, thereby The light source can be electrically connected to the bulb holder to obtain the electric energy required for the illumination and emit light to be emitted from the transparent bulb cover; the light guide rod illumination device adopts the light source disposed on the light entrance surface of the light guide rod. One side or a design directly embedded in the light guiding rod, so that the light emitted by the light source can be incident into the light guiding rod and guided through the optical microstructure in the light guiding rod to be emitted from the light guiding rod, thereby providing Ample and uniform illumination.

However, regardless of which type of illumination device is used to provide illumination, since the existing light source still has light having a wavelength falling in the infrared band, the light source has a long time when the user uses the illumination device for a long time to provide the illumination function. The infrared radiant energy may cause thermal damage to the user's cornea, which may cause safety concerns in the actual use of the illuminating device.

It is an object of the present invention to provide an illumination device that uses a filter film structure to filter out light rays emitted by a light source having a wavelength in the infrared band to solve the above problems.

According to an embodiment, the illumination device of the present invention comprises a body, at least one light source, and a filter film structure. The light source is disposed in the body for emitting light. The filter film structure is disposed in the body to cover the position of the light source for filtering light emitted by the light source in a wavelength band of the infrared light.

In summary, the present invention uses a filter film structure disposed in the main body of the illumination device to cover the position of the light source for filtering light emitted by the light source in the infrared band. It is possible to achieve the effect that the light emitted from the illumination device does not have infrared radiation energy. In this way, through the infrared radiation energy filtering design of the filter film structure, the illumination device provided by the invention can effectively prevent the infrared radiation energy of the light mentioned in the prior art from generating heat to the cornea of the user. The problem of injury occurs, which greatly improves the safety of the lighting device in actual use.

The advantages and spirit of the present invention will be further understood from the following embodiments and the accompanying drawings.

Please refer to FIG. 1 , which is a partial cross-sectional view of a lighting device 10 according to a first embodiment of the present invention. The lighting device 10 includes a main body 12, a light source 14, and A filter film structure 16. In this embodiment, the filter film structure 16 can be a filter film, the main body 12 includes a light guide bar 18 and a sleeve 20, the light guide bar 18 has a light incident surface 19, and the sleeve 20 is sleeved. The light source 14 is disposed at one end of the light guide bar 18 at a position corresponding to the light incident surface 19, and the filter film structure 16 is disposed in the sleeve 20 and located at the light source 14 and the light incident surface 19 The light source 14 is preferably a light emitting diode (but not limited thereto), and the filter film structure 16 is preferably composed of a multilayer film material. For example, the filter film structure 16 It can be a hot mirror capable of filtering out light having a wavelength in the infrared band (for example, between 700 nm and 1100 nm), but not limited thereto, and the filter film structure 16 can also be composed of an infrared absorbing compound. Such as diimine salt compounds and the like.

Through the above configuration, as shown in FIG. 1, before the light emitted by the light source 14 is incident on the light incident surface 19 of the light guiding rod 18, the light may be passed through the filter film structure 16, thereby utilizing the filter film structure. 16 can filter out the characteristics of light having a wavelength in the infrared band, and the infrared radiation energy of the light incident on the light incident surface 19 of the light guide bar 18 can be effectively filtered by the filter film structure 16, thereby ensuring The light emitted from the light guiding rod 18 does not have infrared radiation energy. In this way, even when the user uses the illumination device 10 for a long time to provide the illumination function, since the light provided by the illumination device 10 does not have the infrared radiation energy, the light mentioned in the prior art can be effectively prevented. The problem that the infrared radiant energy causes thermal damage to the cornea of the user occurs, thereby greatly improving the safety of the illuminating device 10 in practical use. In addition, since the filter film structure 16 is only used to filter out the infrared radiant energy of the light, the illumination provided by the illumination device 10 does not have a representation of the color temperature and color coordinates of the light. Too much offset.

It should be noted that, in the case that the light source 14 is changed to a halogen lamp, since the infrared ray energy of the halogen lamp accounts for more than 70% of the total radiant energy of the light, the main body 12 of the illuminating device 10 may further include a The fluorescent conversion layer 22 is disposed between the light source 14 and the filter film structure 16 for converting the infrared light emitted by the halogen lamp into visible light, thereby effectively preventing the filter film structure 16 from filtering out excessive light radiation energy. The situation happened. In practical applications, the arrangement in which the fluorescent conversion layer 22 is disposed between the light source 14 and the filter film structure 16 is preferably as shown in FIG. 2, but is not limited thereto. In addition, it is known from practical experience that as the color rendering index (CRI) of the light is higher, the infrared radiant energy of the light is higher, and therefore, the present invention can be preferably applied to have a high color rendering. The illumination device of the light source with a sex index (such as greater than 75), so that the filter effect of the filter film structure can be more significant.

In the present invention, the design of the main body of the illumination device and the structure of the filter film may not be limited to the above embodiment. For example, please refer to FIG. 3 , which is a partial exploded view of a lighting device 100 according to a third embodiment of the present invention. As shown in FIG. 3 , the lighting device 100 includes a main body 102 and a plurality of light sources. 104, and a filter film structure 106. In this embodiment, the filter film structure 106 can be a filter film layer, and the main body 102 includes a light guide bar 108 and a strip of transparent light cover 110, each light source 104. The light-transmissive lamp cover 110 is disposed on the light-guiding rod 108 to collectively accommodate each light source 104, and the filter film structure 106 is formed on the strip-shaped light-transmitting lamp cover 110. Similarly, each of the light sources 104 is preferably a light emitting diode (but not limited thereto), and the filter film structure 106 is preferably composed of a multilayer film material, for example. In other words, the filter film structure 106 can be a heat mirror capable of filtering out light having a wavelength in the infrared band (for example, between 700 nm and 1100 nm), but not limited thereto, the filter film structure 106 can also be changed to infrared rays. The composition of the absorbing compound, such as a diimine salt compound or the like.

Similarly, through the above configuration, before the light emitted by the light source 104 is emitted from the light guiding rod 108, the light may pass through the filter film structure 106, thereby filtering the wavelength in the infrared band by using the filter film structure 106. The characteristic of the light, the light emitted from the light guiding rod 108 can not have the infrared radiation energy, thereby effectively preventing the problem that the infrared radiation energy of the light mentioned in the prior art causes thermal damage to the cornea of the user. Thereby, the safety of the lighting device 100 in actual use is greatly improved.

In addition, the present invention can also be applied to a bulb structure. For example, please refer to FIG. 4, which is a front view of a lighting device 200 according to a fourth embodiment of the present invention, as shown in FIG. The illumination device 200 includes a body 202, a light source 204, and a filter film structure 206. In this embodiment, the filter film structure 206 is a filter film mask to cover the light source 204. The body 202 includes a bulb holder 208 and a light bulb cover 210. The light source 204 is mounted on the bulb holder 208. The light bulb cover 210 is disposed on the bulb holder 208 to accommodate the light source 204 and the filter film structure 206 together, whereby the light source 204 can be electrically connected to the bulb holder 208 to obtain the electric energy required for the illumination. The emitted light is emitted from the light-transmitting bulb cover 210. Similarly, the light source 204 is Preferably, it is a light-emitting diode (but not limited thereto), and the filter film structure 206 is preferably composed of a multilayer film material. For example, the filter film structure 206 can be capable of filtering wavelengths. A heat mirror of light in the infrared band (for example, between 700 nm and 1100 nm) is not limited thereto, and the filter film structure 206 may be composed of an infrared absorbing compound such as a diimine salt compound.

Similarly, through the above configuration, before the light emitted by the light source 204 is emitted from the light-transmitting bulb cover 210, the light may pass through the filter structure 206, thereby filtering the wavelength in the infrared band by using the filter structure 206. The characteristic of the light inside, the light emitted from the light-transmitting bulb cover 210 can have no infrared radiation energy, thereby effectively preventing the problem that the infrared radiation energy of the light mentioned in the prior art causes thermal damage to the cornea of the user's eye. Occurs, thereby greatly improving the safety of the lighting device 200 in actual use. In addition, it should be noted that the design of the filter film structure mentioned in this embodiment is a separately disposed filter film mask, and can also be applied to the third embodiment, that is, the filter film structure. 106 can be modified as a filter film mask, which can be disposed between the light guide bar 108 and the strip light-transmitting lamp cover 110 and cover the light source 104. The related description can be analogized with reference to this embodiment. Let me repeat.

It is worth mentioning that the configuration of the filter film structure and the light-transmitting bulb cover is not limited to the above embodiment, and the filter film layer may be attached to the design of the light-transmitting bulb cover. For example, please refer to FIG. 5 is a front view showing a filter film structure 206 ′ of one of the illumination devices 200 ′ attached to the light-transmitting bulb cover 210 according to another embodiment of the present invention. FIG. 5 is a filter film. The structure 206' is formed as a filter film layer and is transparent to light. The light radiant energy filtering effect is the same as that of the above embodiment, and the related design of other components of the illuminating device 200' can be analogized with reference to the above embodiment, so Narration.

Compared with the prior art, the present invention uses a filter film structure disposed in the main body of the illumination device to cover the position of the light source for filtering light emitted by the light source in the infrared band. The effect that the light emitted from the illumination device does not have infrared radiation energy can be achieved. In this way, through the infrared radiation energy filtering design of the filter film structure, the illumination device provided by the invention can effectively prevent the infrared radiation energy of the light mentioned in the prior art from generating heat to the cornea of the user. The problem of injury occurs, which greatly improves the safety of the lighting device in actual use.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

18,108‧‧‧Light guide rod

19‧‧‧Into the glossy surface

20‧‧‧ sleeve

22‧‧‧Fluorescent conversion layer

110‧‧‧ strip light shade

111, 211‧‧‧ inside

208‧‧‧Light bulb holder

210‧‧‧Light bulb cover

10, 10', 100, 200, 200' ‧ ‧ lighting fixtures

12, 102, 202‧‧‧ subjects

14, 104, 204‧‧‧ Light source

16, 106, 206, 206'‧‧‧ filter film structure

Fig. 1 is a partial cross-sectional view showing a lighting device according to a first embodiment of the present invention.

Fig. 2 is a partial cross-sectional view showing a phosphor conversion layer according to a second embodiment of the present invention disposed between a light source and a filter film structure.

Figure 3 is a partial exploded view of a lighting device according to a third embodiment of the present invention schematic diagram.

Figure 4 is a front elevational view of a lighting device in accordance with a fourth embodiment of the present invention.

Fig. 5 is a front elevational view showing the structure of the filter film according to the fifth embodiment of the present invention attached to a light-transmitting bulb cover.

200‧‧‧Lighting device

202‧‧‧ Subject

204‧‧‧Light source

206‧‧‧Filter film structure

208‧‧‧Light bulb holder

210‧‧‧Light bulb cover

Claims (14)

A lighting device comprising: a main body; at least one light source disposed in the main body for emitting light; and a filter film structure disposed in the main body to cover the position of the light source for The light emitted by the light source in the infrared band is filtered out. The lighting device of claim 1, wherein the main body comprises: a bulb holder mounted on the bulb holder; and a light transmissive bulb cover disposed on the bulb holder to accommodate the light source. The illuminating device of claim 2, wherein the filter film structure is a filter film mask disposed at a position corresponding to the light source of the light bulb holder to cover the light source. The illuminating device of claim 2, wherein the filter film structure is a filter film layer formed on an inner side surface of the light-transmitting bulb cover corresponding to the light source. The lighting device of claim 1, wherein the main body comprises: a light guiding rod having a light incident surface; and a sleeve sleeved on one end of the light guiding rod, the light source is disposed on the sleeve The inside of the cylinder corresponds to the position of the light surface. The illumination device of claim 5, wherein the filter film structure is a filter film a sheet disposed within the sleeve and between the light source and the light incident surface. The illuminating device of claim 1, wherein the main body comprises: a light guiding rod, the light source is embedded on the light guiding rod; and a transparent light shielding cover disposed on the light guiding rod to accommodate the light guiding rod light source. The illuminating device of claim 7, wherein the filter film structure is a filter film layer formed on an inner side surface of the light-transmitting lamp cover corresponding to the light source. The illumination device of claim 1, wherein the filter film structure is composed of a multilayer film material or an infrared absorbing compound. The illumination device of claim 9, wherein the filter film structure is a hot mirror. The illumination device of claim 9, wherein the filter film structure is composed of a diimine salt compound. The illumination device of claim 1, wherein the filter film structure is configured to filter light emitted by the light source between 700 nm and 1100 nm. The lighting device of claim 1, wherein the light source is a halogen lamp, the body further comprising: A fluorescent conversion layer disposed between the light source and the filter film structure for converting infrared rays emitted by the halogen lamp into visible light. The illumination device of claim 1, wherein the light emission of the light source has a Color Rendering Index (CRI) of greater than 75.