TWI473955B - Light guide forming method - Google Patents

Description

Light guide forming method

The invention relates to a light guide body and a molding method thereof, in particular to a method for molding a hyperbolic light guide body with a simplified process and high mass productivity.

According to the invention, the invention of the electric lamp can completely change the way of life of all human beings. If there is no electric light in our life, when the weather or the weather is not good, all the work will be stopped; if it is limited by lighting, it is very likely If the building style or the human lifestyle is completely changed, all human beings will not be able to make progress and continue to stay in a relatively backward era.

Compared with the traditional light source, the light-emitting diode (LED) has the advantages of small volume, power saving, good luminous efficiency, long life, fast reaction speed, and no pollution of toxic substances such as heat radiation and mercury. In recent years, the application of light-emitting diodes has been extremely extensive. In the past, the brightness of the light-emitting diodes could not replace the traditional illumination source. However, with the continuous improvement of the technical field, high-power light-emitting diodes with high illumination brightness have been developed, which is sufficient to replace the traditional illumination source. However, conventional LED lamps using LEDs still cannot effectively improve the illumination range. Therefore, how to improve the overall illumination range of LED lamps by structural design has become an important issue for this business.

In view of the above, the present invention provides a method for molding a hyperbolic light guide body with a simplified process and high mass productivity, which is its main purpose.

To achieve the above object, the molding method of the present invention comprises at least the steps of: providing a sheet; forming a microstructure; performing press forming, stamping the sheet into a hyperboloid; providing a mold; and fixing the stamped sheet to the sheet The mold is embossed and molded by a resin material to form a light guide body, and the light guide body is formed with a hyperboloid.

According to the above main technical feature, the plate has an extended surface extending in the first direction and the second direction, and the double curved surface has at least one protrusion arranged in the first direction and at least one protrusion arranged in the second direction unit.

According to the above main technical feature, the plate has an extending surface extending along the first direction and the second direction, and the double curved surface has a plurality of protrusions and depressions arranged in the first direction, and a plurality of rows arranged in the second direction. a protrusion and a recess.

According to the above main technical features, a plurality of microstructures may be formed on the surface of the sheet prior to press forming.

According to the above main technical features, after the light guide body is formed, a reflective layer may be further formed, and the reflective layer is located on one side of the light guide body.

According to the above main technical features, the reflective layer may be formed by a chemical deposition process to form a thin metal reflective surface on one side of the light guide body; or the reflective layer may be a reflective sheet and directly coated on one side of the light guide body. .

In order to achieve the above object, the present invention also provides a light guiding body for a lighting device, the light guiding body having a thin plate having a bottom surface, a light emitting surface opposite to the bottom surface, and a space between the bottom surface and the light emitting surface a light-incident surface, wherein the light-incident surface may be provided with a plurality of light-emitting diodes, the light-emitting surface having a hyperboloid, the double curved surface having at least one protrusion arranged in the first direction, and at least one along the second direction Arrange the protrusions.

According to the above main technical feature, the hyperboloid of the light guide body has a plurality of protrusions and depressions arranged in the first direction, and a plurality of protrusions and depressions arranged in the second direction.

The features of the present invention can be clearly understood by referring to the drawings and the detailed description of the embodiments.

As shown in the flow block diagram of the light guide forming method of the present invention, the molding method of the present invention includes at least the following steps:

A sheet 10 is provided. As shown in the second diagram (A), the sheet 10 may be a steel sheet having an extended surface 11 extending in the first direction X and the second direction Y.

Forming the microstructure, as shown in the second figure (B), forming a plurality of microstructures 14 on the surface of the sheet 10; wherein the manner of molding the microstructures can be formed by laser, wet etching or dry etching; The structure can be in the form of a groove as shown, or it can be other geometric shapes.

By stamping, the sheet 10 is stamped to form a hyperboloid, as in the embodiment shown in the second diagram (C), the hyperboloid has a protrusion 12 arranged in the first direction X, and a second direction Y-arranged protrusions 13.

Provide a mold. The stamped and formed sheet material is fixed to the mold.

And performing refurbishing, molding by a resin material to form a light guide body, for example, injection molding or extrusion molding may be performed by using a resin material, or may be transparently placed in a mold for extrusion molding. The light guide body is correspondingly formed with a hyperboloid.

As shown in the third figure, that is, the structure of the light guide body 20 formed by the present invention, the light guide body 20 has a thin plate member 21 having a bottom surface. 211, a light-emitting surface 212 opposite to the bottom surface 211, and a light-incident surface 213 between the bottom surface 211 and the light-emitting surface 212. The light-emitting surface 212 has a hyperboloid corresponding to the plate material, and the double curved surface has a a protrusion 22 arranged in the first direction X, and a protrusion 23 arranged in the second direction Y. In the embodiment shown in the figure, the light guide body 20 can form a semicircular shell-like structure, and The light-emitting surface 212 of the light guide body is formed with a plurality of microstructures 24. As shown in the embodiment of the fourth figure, each of the microstructures 24 may be in the form of a V-shaped groove, and the microstructure 24 can be used to reflect light and increase the diffusion angle. In order to provide a wider illumination area; of course, a plurality of microstructures may be formed on the bottom surface of the light guide body.

Wherein, the light-emitting surface 213 can be provided with a plurality of light-emitting diodes 30. When the light-emitting diodes 30 emit light, the light rays change the path of the light along the hyperboloid of the light guide plate, and are emitted toward the light-emitting surface 212, thereby controlling Luminance and angle of illumination increase light and enhance illumination range for maximum illumination.

In addition, after the light guide body is formed, the reflective layer 25 may be further formed. As shown in the embodiment of the fourth embodiment, the reflective layer 25 is located on one side of the light guide body, and the reflection of the overall light is further enhanced by the reflective layer 25. Rate, the light is increased to enhance the illumination; wherein the reflective layer can be formed by a chemical deposition process to form a thin metal reflective surface on one side of the light guide; or the reflective layer is a reflective sheet and directly coated (for example Fitted on one side of the light guide.

Furthermore, the plate has an extended surface extending in the first direction and the second direction, and the double curved surface has a plurality of protrusions and depressions arranged in the first direction, and a plurality of protrusions and depressions arranged in the second direction. a portion, the refracted light guide body is formed as shown in the fifth figure, the hyperboloid of the light guide body has a plurality of protrusions 22 and depressions 26 arranged in the first direction, and a plurality of rows arranged in the second direction The protrusion 23 and the recess 27, and the surface of the light guide is shaped A plurality of microstructures 24 are formed.

As described above, the present invention provides a light guide body and a molding method thereof, and a method for forming the invention patent according to the law; the technical content and technical features of the present invention are disclosed above, but those skilled in the art It is still possible to make various substitutions and modifications without departing from the spirit of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims

X‧‧‧ first direction

Y‧‧‧second direction

10‧‧‧ plates

11‧‧‧Extended face

12, 13‧‧‧ protrusions

14‧‧‧Microstructure

20‧‧‧Light guide

21‧‧‧thin sheet

211‧‧‧ bottom

212‧‧‧Glossy surface

213‧‧‧Into the glossy surface

22, 23‧‧‧ protruding parts

24‧‧‧Microstructure

25‧‧‧reflective layer

26, 27‧‧‧Depression

30‧‧‧Lighting diode

The first figure is a block diagram of the flow of the light guide forming method of the present invention.

The second figures (A) to (C) are perspective views of the structure in which the sheet material is press-formed in the present invention.

The third figure is a perspective view showing the structure of the first embodiment of the light guide body of the present invention.

The fourth figure is a perspective view showing the structure of the second embodiment of the light guide body of the present invention.

The fifth figure is a perspective view showing the structure of the third embodiment of the light guide body of the present invention.

Claims (9)

A light guide forming method comprises at least the steps of: providing a plate; forming a microstructure, forming a plurality of microstructures on the surface of the plate; performing stamping forming, stamping the plate to form a hyperboloid; providing a die to form the stamping The rear plate is fixed on the mold; the embossing is performed by molding with a resin material to form a light guide body, and the light guide body is correspondingly formed with a hyperboloid. The light guide forming method according to claim 1, wherein the plate has an extending surface extending in the first direction and the second direction, and the double curved surface has at least one protruding portion arranged in the first direction. And at least one protrusion arranged in the second direction. The light guide forming method according to claim 1, wherein the plate has an extending surface extending in the first direction and the second direction, and the double curved surface has a plurality of protrusions arranged in the first direction and a recessed portion, and a plurality of protrusions and recesses arranged in the second direction. The light guide forming method according to any one of claims 1 to 3, wherein the molded microstructure is formed by laser, wet etching or dry etching. The light guide forming method according to any one of claims 1 to 3, wherein after the light guide is formed, a reflective layer is further formed, the reflective layer being located on one side of the light guide. The method of forming a light guide according to claim 5, wherein the reflective layer is formed by a chemical deposition process to form a thin metal reflective surface on a side of the light guide. The light guide body molding method according to claim 5, wherein the reflective layer is a reflection sheet and is directly coated on one side of the light guide body. The light guide molding method according to any one of the items 1 to 3, wherein the retreading may be performed by injection molding or extrusion molding using a resin material, or may be transparently placed in a mold. Extrusion molding is carried out. The light guide forming method according to any one of claims 1 to 3, wherein the sheet material may be a rigid material or the sheet material may be a steel sheet.