TW201303218A - Lighting device - Google Patents

Abstract

A lighting device is disclosed, which includes a light guide plate, a light source for providing light to the light guide plate, a light uniform film disposed on alighting surface of the light guide plate, and a color filter disposed on the light uniform film. Another color different from the color filter is displayed when the light provided by the light source passes through the light uniform film and the color filter.

Description

Light source module

The invention relates to a light source module, and in particular to a light guiding structure of a light source module.

Light Emitting Diode (LED) is a tiny solid-state light source with the advantages of small size, good shock resistance, power saving, long life and variety of colors, and can meet the needs of various emerging applications. It has become a light source that can be seen everywhere in daily life. Compared with traditional incandescent bulbs and fluorescent lamps, the light-emitting diodes can have a plurality of combinations, and the single light-emitting diodes have a low heat generation, thereby reducing the generation of heat radiation. The light-emitting diode can be planarly packaged and can be developed into a light and thin short product. Based on the above advantages, the light-emitting diode is favored by the industry and can be a potential commodity to replace the traditional lighting device. Therefore, the light-emitting diode has been widely used as a light source in various light source modules.

In the case of a light source module, a light guide plate is often added to the light exiting portion to uniformly diverge the light, and a color film such as a black filter is disposed above the light guide plate. Therefore, the light-emitting color of the light source module that the user sees that is not lit and lit is the same, and only the difference in brightness.

Therefore, the object of the present invention is to provide a light source module for improving the visibility of the light source module before and after lighting.

According to an embodiment of the invention, a light source module includes a light guide plate, a light source for providing light to the light guide plate, a uniform light film disposed on the light exit surface of the light guide plate, and a color filter disposed on the light homogenizing film. sheet. When the light of the light source is mixed with the color filter through the uniform film, another color is displayed.

The light homogenizing film may preferably be a white reflective sheet. The material of the homogenizing film may be polyester (PET). The color filter comprises a substrate and a color photoresist layer completely covering the substrate. The color photoresist layer may be a monochromatic photoresist layer or a color photoresist layer. The light source module can more selectively include a pattern layer formed on one side of the light-homogenizing film facing the color filter, and when the light source is lit, the pattern of the pattern layer is displayed. The light source module further includes a transparent protection plate and is disposed on the color filter. The light source may be disposed on one side of the light guide plate. The light guide plate comprises a plurality of microstructures formed on the light exit surface or the bottom surface of the light guide plate.

The light source module of the present invention has a special light guiding structure, so that the light is different from the color of the color filter displayed when the light is not illuminated after passing through the uniform film and the color filter. In this way, the color contrast of the light source module before and after lighting can be highlighted, and the recognition of the light source module can be improved.

The spirit and scope of the present invention will be apparent from the following description of the preferred embodiments of the invention. The spirit and scope of the invention are not departed.

The light source module often adds a light guide plate at the light exiting portion to uniformly diverge the light, and a color filter such as a black filter is disposed above the light guide plate. Therefore, the light-emitting color of the light source module that the user sees that is not lit and lit is the same, and only the difference in brightness. Therefore, the present invention proposes a light source module having a unique light guiding structure to have a distinct color difference when illuminated and unlit.

Referring to Figure 1, there is shown a cross-sectional view of an embodiment of a light source module of the present invention. The light source module 100 includes a light guide plate 110, a light source 120, a light homogenizing film 130, a color filter 140, a transparent protection plate 150, and a plurality of transparent double-sided tapes 160. The light source 120 is used to provide light to the light guide plate 110. The light-homogenizing film 130 is disposed on the light-emitting surface 112 of the light guide plate 110 , and the light-homogenizing film 130 is fixed on the light guide plate 110 by the transparent double-sided tape 160 . The color filter 140 is further stacked on the light-homogenizing film 130, and is fixed to the light-homogenizing film 130 by a transparent double-sided tape 160. The transparent protection plate 150 can be selectively disposed on the color filter 140 and fixed on the color filter 140 by the transparent double-sided tape 160 to achieve the purpose of protecting the structure of the lower layer.

The light source 120 can be disposed on the side surface 114 of the light guide plate 110 and in contact with the side surface 114 of the light guide plate 110. The side surface 114 and the light exit surface 112 of the light guide plate 110 are substantially perpendicular to each other. Light source 120 can be a light emitting diode. The color emitted by the light source 120 can be white light or other colored light. The light guide plate 110 further has a plurality of microstructures 116 formed on the surface 118 of the light guide plate 110 relative to the light exit surface 112. The microstructures 116 include trenches or bumps, etc., such that the light emitted by the light source 120 is conducted through the light guide plate 110 and is emitted toward the light exit surface 112.

The function of the uniform film 130 includes diffused light, diffused light, or mixed light. The light-homogenizing film 130 in this embodiment may be a reflective sheet, and the material of the light-homogenizing film 130 may be polyester (PET). For example, the uniform film 130 is white in a general state, and when light is transmitted, the brightness of the light can be raised, and the emitted light is approximated to white light. Further, the uniform film 130 may be a transparent or translucent material.

The color filter 140 is disposed on the light homogenizing film 130. The color filter 140 includes a substrate 142 and a color photoresist layer 144 that completely covers the substrate 142. The color photoresist layer 144 may be a monochromatic photoresist layer and a color photoresist layer. For example, the color filter 140 can be a filter having a black color resist.

The dimensions of the light guide plate 110, the light homogenizing film 130, and the color filter 140 may be the same or different. When the light source module 100 is combined with the color filter 130 and the color filter 140, the light source module 100 can display different colors when the light source 120 is lit and not lit. That is, when the light source module 100 is not illuminated when the light source 120 is not illuminated, the first layer of the user visually sees the color of the colored color filter 140, as described above.

Referring to FIG. 1 and FIG. 2 simultaneously, FIG. 2 is a top view showing the light source module 100 in FIG. 1 when it is lit. When the light source 120 is not illuminated, the light-homogenizing film 130 is covered by the color filter 140, and the color observed by the user's naked eye, that is, the color displayed by the light source module 100, is the color directly presented by the color filter 140. However, when the light source 120 is lit, the effect produced by the light-homogenizing film 130 causes the light to become similar to white light after being mixed by the light-homogenizing film 130 and the color filter 140, so that the light source module 100 displays differently. Another color of the color filter 140.

The light source module 100 may further include a light shielding film having a specific hollow region to expose a light emitting region of a specific shape as shown in the drawing. Alternatively, a specific shape can be produced by cutting the light guide plate 110, the light-homogenizing film 130, and the color filter 140.

Referring to FIG. 3, a cross-sectional view of another embodiment of a light source module 100 of the present invention is illustrated. The light source module 100 may further include a pattern disposed on the light-homogenizing film 130 in addition to the light guide plate 110, the light source 120, the light-homogenizing film 130, the color filter 140, the transparent protective plate 150, and the transparent double-sided tape 160. Layer 170. The pattern layer 170 may be formed on the light-homogenizing film 130 by printing or pasting, in particular, on one side of the light-homogenizing film 130 facing the color filter 140. The pattern layer 170 may contain ink.

Referring to FIG. 3 and FIG. 4 simultaneously, FIG. 4 is a top view showing the light source module 100 in FIG. 3 when it is lit. As described above, after the light source 120 is turned on, the light emitted by the light guide plate 110 is mixed with the color filter 140 to display light that is similar to white light. In this embodiment, the light-homogenizing film 130 is disposed. The pattern layer 170 is further provided. Therefore, when the light source 120 is lit, the pattern of the pattern layer 170 is displayed on the light source module 100.

Referring to Figure 5, there is shown a cross-sectional view of still another embodiment of the light source module of the present invention. The materials of the above-mentioned uniform light film 130 are all described by a reflective sheet, however, the uniform light film 130 may also be a diffusion sheet. In order to achieve the effect that the light emitted by the light source 120 passes through the color filter 140 and the light-homogenizing film 130 (which is a diffusion sheet) to become another color, the lower layer of the light guide plate 110 must have a reflecting plate 180.

It will be apparent from the above-described preferred embodiments of the present invention that the application of the present invention has the following advantages. The light source module of the present invention has a special light guiding structure, so that the light is different from the color of the color filter displayed when the light is not illuminated after passing through the uniform film and the color filter. In this way, the color contrast of the light source module before and after lighting can be highlighted, and the recognition of the light source module can be improved.

Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Light source module

110. . . Light guide

112. . . Glossy surface

114. . . side

116. . . microstructure

118. . . surface

120. . . light source

130. . . Uniform film

140. . . Color filter

142. . . Substrate

144. . . Color photoresist layer

150. . . Transparent protection board

160. . . Transparent double-sided tape

170. . . Pattern layer

180. . . Reflective plate

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

1 is a cross-sectional view showing an embodiment of a light source module of the present invention.

FIG. 2 is a top view showing the light source module in FIG. 1 when it is lit.

FIG. 3 is a cross-sectional view showing another embodiment of the light source module of the present invention.

Fig. 4 is a top view showing the light source module in Fig. 3 when it is lit.

FIG. 5 is a cross-sectional view showing still another embodiment of the light source module of the present invention.

100. . . Light source module

110. . . Light guide

112. . . Glossy surface

114. . . side

116. . . microstructure

118. . . surface

120. . . light source

130. . . Uniform film

140. . . Color filter

142. . . Substrate

144. . . Color photoresist layer

150. . . Transparent protection board

160. . . Transparent double-sided tape

Claims (9)

A light source module includes: a light guide plate; a light source for providing light to the light guide plate; a uniform light film disposed on one of the light guide surfaces of the light guide plate; and a color filter disposed on the light homogenizing film When the light of the light source is mixed with the color filter through the light-shading film, another color is displayed. The light source module of claim 1, wherein the light homogenizing film is a reflective sheet. The light source module of claim 1, wherein the material of the light homogenizing film is polyester (PET). The light source module of claim 1, wherein the color filter comprises a substrate and a color photoresist layer completely covering the substrate. The light source module of claim 4, wherein the color photoresist layer is a monochromatic photoresist layer or a color photoresist layer. The light source module of claim 1, further comprising a pattern layer formed on the surface of the color filter that faces the color filter, and when the light source is illuminated, the pattern of the pattern layer is displayed . The light source module of claim 1, further comprising a transparent protection plate disposed on the color filter. The light source module of claim 1, wherein the light source is disposed on one side of the light guide plate. The light source module of claim 1, wherein the light guide plate comprises a plurality of microstructures formed on a light exit surface or a bottom surface of the light guide plate.