TWI490432B - Light emitting device - Google Patents

Description

Illuminating device

The present invention relates to a light-emitting device, and more particularly to a light-emitting device in which a light-emitting panel/light-emitting sheet formed by a transparent substrate having a semiconductor light-emitting unit is erected on a base.

In the field of lighting technology, modern light sources have developed in the direction of cost, environmental protection and power saving, in order to obtain better lighting benefits under the condition of less energy, which makes the development of light-emitting diodes. Play an important role.

In addition to low power consumption, mercury-free, long life and low carbon dioxide emissions, the LEDs have been widely used in 3C product indicators and display devices, and with the production yield of LEDs. The increase in unit manufacturing costs has also been greatly reduced, so the demand for light-emitting diodes continues to increase.

However, if a light-emitting diode or a similar light-emitting unit is actually applied to a lighting fixture, there is still much room for development. In the past, when a light-emitting diode was used as a light source, a plurality of light-emitting diode chips or light-emitting diodes were arranged in a plane and emitted in a single direction, and an optical reflective layer was further disposed on the bottom of the wafer. In order to improve the light extraction efficiency of the single light-emitting diode itself.

However, this arrangement is not very advantageous for making lamps with large illumination angles, because only part of the light generated by the light-emitting diode itself travels in the direction of the previous illumination, and the other part of the light energy is Absorbed in the base of the lamp or lost during the reflection process, so more LEDs need to be set to make up.

Moreover, the arrangement of the lamp also limits the design of the lamp form. For example, for an advertising billboard having both front and back sides for printing, if an existing light-emitting diode light source arrangement is used, it is necessary to provide a light-emitting diode on both sides. Backlighting, instead of the traditional design, is as long as a single row of fluorescent tubes is placed, which has a negative impact on reducing energy consumption and reducing costs. Therefore, there is still room for improvement in the application of the light-emitting diode as a lighting fixture.

The main object of the present invention is to provide a light-emitting device which uses a transparent substrate carrying a semiconductor light-emitting unit with multiple directions of light as a light-emitting panel, and is erected on the base as an illumination function. Device.

A secondary object of the present invention is to provide a light-emitting device capable of arranging a plurality of light-emitting panels symmetrically, which can increase the light-emitting intensity of the light-emitting device, and at the same time take into account the light-emitting uniformity in each direction.

Another object of the present invention is to provide a light-emitting device that can be disposed in a lamp housing or a light box having a printing pattern by using the above-mentioned illuminating panel to be applied as an advertising kanban, which not only has good illuminating effect, low power consumption, and is unnecessary Transformers and other advantages can also replace traditional fluorescent tubes.

In order to achieve the above object, the present invention discloses a light-emitting device, comprising: a base; at least one transparent substrate disposed on the base, and having a first angle between the transparent substrate and the base; And being coupled to the base, wherein the transparent substrate is at least partially disposed in a space formed by the lamp housing; and the semiconductor light emitting unit emitting light in at least one direction is disposed on a light emitting surface of the transparent substrate, and the light emitting unit is disposed The emitted light at least partially penetrates the transparent substrate, and emits light from a light-transmitting surface corresponding to the light-emitting surface, thereby improving the light-emitting efficiency of the light-emitting device. in this way Under the framework, the illuminating device disclosed by the invention can provide sufficient illumination intensity, uniform light-emitting effect, and flexibility of adjusting brightness by changing the number of illuminating plates for different occasions.

1‧‧‧Lighting device

11‧‧‧Base

12‧‧‧Transparent substrate

121‧‧‧Lighting surface

122‧‧‧Transparent surface

13‧‧‧Semiconductor lighting unit

131‧‧‧Lighting surface

14‧‧‧ circuit board

15‧‧‧Light shell

151‧‧‧ Cover

152‧‧‧Long tube

θ ₁ ‧‧‧first angle

θ ₂ ‧‧‧second angle

D‧‧‧Distance

1 is a schematic structural view of a light-emitting device according to a preferred embodiment of the present invention; and FIG. 2A is a schematic view of a square base with a point-symmetrically arranged transparent substrate according to a preferred embodiment of the present invention; FIG. 2B is a schematic diagram of a pentagonal base with a point symmetrically arranged transparent substrate according to a preferred embodiment of the present invention; FIG. 2C is a point symmetric arrangement of a preferred embodiment of the present invention; Schematic diagram of a hollow star base of a transparent substrate; FIG. 3A is a schematic diagram of a rectangular base with a line-symmetrically arranged transparent substrate according to a preferred embodiment of the present invention; FIG. 3B is a comparison of the present invention FIG. 4 is a schematic view showing a light-emitting surface and a surface of a preferred embodiment of the present invention; FIG. 5 is a schematic view showing a light-emitting surface and a surface of a preferred embodiment of the present invention; FIG. 6 is a top plan view of an advertising billboard according to still another preferred embodiment of the present invention; and FIG. 7A is a further preferred embodiment of the present invention. Example of the length of a single transparent substrate Schematic perspective view of the lamp; and a seventh Panel B: which system the present invention with another long three preferred embodiments of the transparent substrate A cross-sectional view of the shaped tube.

The features of the present invention and the effects achieved by the preferred embodiments and the detailed description are as follows: First, please refer to the first figure, which is a schematic diagram of the structure of the light-emitting device of the present invention; The device 1 includes: a base 11; at least one transparent substrate 12; at least one light emitting surface 121; at least one light transmitting surface 122; at least one light emitting unit 13 and at least a first angle θ ₁ .

The transparent substrate 12 is flanked on the base 11 and coupled to the base, and the first angle θ ₁ between the two is between 30° and 150°, so that the transparent substrate 12 is not Lying flat on the base 11. The light-emitting surface 121 and the light-transmissive surface 122 refer to two surfaces of the transparent substrate 12 that correspond to each other, and the semiconductor light-emitting unit 13 that emits light in multiple directions is disposed on the light-emitting surface 121.

In the present invention, the base 11 is a base for carrying functions of carrying, power supply, connection, and heat dissipation. The material of the base 11 can be made of metal as the base of a commercially available bulb, and the shape is not limited to the first. The rectangle shown in the figure may be a circle, a polygon, or even a hollow circle, a polygon, or the like as long as the transparent substrate 12 can be placed thereon.

In the present invention, the transparent substrate 12 is designed to have a thickness greater than 200 micrometers (μm) for optimized reliability and cost effectiveness, and the substrate is designed to have a light wavelength range of greater than or equal to 420 nm (nm) in the light emitting unit. When the light wavelength range is less than or equal to 470 nanometers (nm), the light transmittance is greater than or equal to 70%, so that the light-emitting device of the present invention has the most uniform light-emitting effect; and the material of the transparent substrate of the present invention Available in translucent or fully transparent materials such as alumina, glass, plastic or rubber .

The semiconductor light-emitting unit 13 is a multi-directional light-emitting diode disposed on one side of the transparent substrate 12 such that the surface forms a light-emitting surface 121, and at the same time, the light emitted from the light-emitting unit can penetrate through the transparent surface. The substrate 12 has the other surface of the substrate 12 corresponding to the light-emitting surface as the light-transmissive surface 122.

In the present invention, when a plurality of transparent substrates 12 are arranged on the base 11, they may be arranged in a symmetric arrangement, that is, a plurality of transparent substrates 12 are disposed in the base 11 in a point symmetry or line symmetry. on. Please refer to the second A, B, and II C drawings, which are provided with the transparent substrate 12 on the bases 11 of various shapes, and the light emission of the entire light-emitting device 1 can be made uniform in a point symmetrical manner (the light-emitting unit 13 is omitted) . In addition, it can also be arranged through the line symmetry shown in the third figure (the illumination unit 13 is omitted) under special requirements, but the light-emitting effect is not uniform by point symmetry, but can be changed by changing the size of the first angle θ ₁ . Make further adjustments and improvements.

In addition, referring to the fourth figure, the plurality of light emitting units 13 on the transparent substrate 12 respectively have a light emitting surface 131, and the light emitting surfaces 131 are generally in the structure of the light emitting unit 13 and are substantially the same as the light emitting surface 121 of the transparent substrate 12. The sides are parallel and exposed. In the present invention, the area of the light-emitting surface 121 of the transparent substrate 12 is five times or more the total area of the light-emitting surfaces 131. This is a preferred arrangement ratio in consideration of conditions such as luminous efficiency and heat dissipation.

In addition to the above structure, referring to the fifth figure, the present invention may further include a circuit substrate 14 disposed between the transparent substrate 12 and the base 11 and transmitted through the circuit board 14 and the circuit on the transparent substrate 12 (Fig. The light-emitting unit 13 is electrically connected to the light-emitting unit 13 . If the circuit board 14 is not provided, the light-emitting unit 13 can be directly electrically connected to the base 11 , so that the external power source can supply power to the light-emitting unit 13 via the base 11 .

The invention is applied in practice to prevent particle pollution and rot of dust, moisture and the like. Etching or abrading the transparent substrate 12 and the components such as the light-emitting unit 13 so that the lamp housing or the light box 15 can be disposed to protect and isolate external environmental contaminants, the lamp housing is coupled to the base, and the transparent substrate is at least partially disposed The lamp housing 15 is further configured to be connected to the base 11 of the light-emitting device of the present invention, and at least partially covered and directly in contact with the transparent substrate 12, or at least partially covers the transparent substrate 12 There is no special restriction on the material of the lamp housing 15, as long as it can transmit light.

The illuminating device of the present invention can be designed in the form of an advertising kanban. Please refer to the sixth figure. At this time, the light box 15 used as an advertising kanban has at least two covering surfaces 151, which is the main printing. The advertised layout forms a backlight of the cover 151 by the illumination provided by the light-emitting surface 121 of the transparent substrate 12 and the light-transmissive surface 122, thereby constructing the illuminating device as an advertising kanban. The second angle θ ₂ formed between the transparent substrate 12 and the cover surface 151 is between 0° and 45°, that is, the light-emitting surface or the light-transmissive surface of the transparent substrate 12 is disposed substantially facing the cover surface 151. . In order to ensure that the light generated by the illuminating plate/light emitting sheet of the transparent substrate 12 and the multi-directional light-emitting semiconductor light-emitting unit 13 can penetrate the lamp housing 15 uniformly, the transparent substrate 12 cannot be in close contact with the inner wall of the lamp housing 15. And at least partially disposed in the space formed by the lamp housing and having a distance D greater than 500 micrometers (μm); but it is also designed to form the lamp housing 15 by potting, and at least partially cover the lamp housing 15 And directly in contact with the transparent substrate 12.

Finally, referring to FIG. 7A, the light-emitting device of the present invention can also be applied as an elongated lamp tube 152, that is, the aforementioned lamp housing 15 is designed as a light-transmissive tubular structure, and then carries a transparent substrate 12 that can emit light. And the base 11 is disposed therein, and the figure is a state in which a single transparent substrate 12 is placed; and referring to FIG. 7B, when two or more transparent substrates 12 are disposed in the elongated tube 152, the transparent The light-emitting surfaces 121 of the substrate 12 are arranged in such a manner that they are not parallel to each other. In addition, the transparent substrate 12 does not fit snugly against the inner wall of the elongated lamp tube 15 and is at least partially disposed in the space formed by the lamp housing and has a distance D greater than 500 micrometers (μm); however, it may also be designed to form a lamp by potting. The case 15 is such that the lamp housing 15 is at least partially covered and directly in contact with the transparent substrate 12.

According to the structure of the light-emitting device disclosed by the present invention, the light-emitting panel/light-emitting sheet formed by disposing the light-emitting unit on the transparent substrate can be effectively and fully utilized; and the two main faces of the transparent substrate can emit light, so The maximum light-emitting efficiency can be obtained under the minimum power supply, and the special substrate thickness and optical design in the process can improve the assembly reliability of the light-emitting device of the invention, and have a uniform light-emitting effect, regardless of whether it is applied In the fields of light bulbs, lamps, billboards, etc., it can show its advantages of good luminous effect, low power consumption and uniform light emission. It is an economical and practical light-emitting device.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the variations, modifications, and modifications of the shapes, structures, features, and spirits described in the claims of the present invention. All should be included in the scope of the patent application of the present invention.

1‧‧‧Lighting device

11‧‧‧Base

12‧‧‧Transparent substrate

121‧‧‧Lighting surface

122‧‧‧Transparent surface

13‧‧‧Lighting unit

θ ₁ ‧‧‧first angle

Claims (9)

A light-emitting device includes: a base; at least one transparent substrate coupled to the base, the substrate and the base having a first angle, and the thickness of the substrate is greater than 200 micrometers (μm); at least one direction a light-emitting semiconductor light-emitting unit, the light-emitting diode is directly disposed on the light-emitting surface of the transparent substrate; and a lamp housing is coupled to the base, and the transparent substrate is at least partially disposed on the light-emitting shell a portion of the light emitted by the light emitting unit propagates away from the transparent substrate, and another portion of the light propagates toward the transparent substrate and penetrates the transparent substrate, and the transparent substrate is at a wavelength of light When the range is greater than or equal to 420 nanometers (nm), and the light wavelength range is less than or equal to 470 nanometers (nm), the transmittance of the transparent substrate is greater than or equal to 70%. The illuminating device of claim 1, wherein the material of the transparent substrate is selected from the group consisting of translucent or fully transparent alumina, glass, plastic, and rubber. The illuminating device according to any one of claims 1 to 2, wherein the illuminating unit has a illuminating surface, and an area of the illuminating surface of the transparent substrate is more than 5 times the total area of the illuminating surface. The illuminating device of claim 3, wherein the first angle is between 30° and 150°. The light-emitting device of claim 3, further comprising one or more transparent substrates, and the plurality of transparent substrates are arranged in a symmetrical manner and coupled to the base. The illuminating device of claim 5, wherein the symmetrical arrangement comprises point symmetry or line symmetry. The illuminating device of claim 3, wherein the lamp housing has at least one cover surface, and the second angle between the light-emitting surface of the transparent substrate and the cover surface is between 0° and 45°. The illuminating device of claim 3, wherein the lamp housing and the transparent substrate have a distance greater than 500 micrometers (μm). The illuminating device of claim 3, further comprising one or more transparent substrates, wherein the illuminating surfaces of the transparent substrates are not parallel to each other.