TW201309958A - Illumination module with multiple sets of light sources - Google Patents

Abstract

An illumination module includes a first light emitting unit and second light emitting unit. The first light emitting unit is to provide a first light source with multiple kinds of colors, and the first light source has a first optical spectrum distribution. The second light emitting unit is to provide a second light source with a single color, and the second light source has a second optical spectrum distribution. The second optical spectrum distribution is to compensate for the first optical spectrum distribution.

Description

Light source module with multiple light sources

The invention relates to a light source module with multiple light sources, in particular to a light source module with compensated spectral distribution and tonable function.

In recent years, organic light-emitting diodes (OLEDs) have been widely used in many fields, for example, as backlights for liquid crystal displays (LCDs), and can also be used as general illumination. In addition to the advantages of high luminous efficiency and power saving, OLED does not have the problem of mercury contamination of fluorescent lamps, so it has gradually become the mainstream of the next generation of lighting. In addition, since the light source provided by the OLED is a warm and soft surface light source, and has the characteristics of being thin, large, and easy to manufacture, it is often applied to the lighting art of luxury design and functional lighting.

In general, the color rendering index (CRI) is used to measure the correct color rendering of colors, while the CRI level is related to the spectral width. Although the white light OLED spectrum is wide and has a high CRI, due to the lack of high-efficiency deep blue light materials, CRI is easily restricted (up to about 85) and can only constitute white light with low color temperature. This means that although an OLED mixed with three primary colors (such as red, green, and blue primary colors) may produce white light, when the object is illuminated with this light, it does not necessarily produce a completely natural color, please refer to FIG. Figure 1 is a spectral distribution of a white organic light-emitting diode. As shown in Fig. 1, even when the object is illuminated by white light emitted by a high power efficiency OLED, the naked eye still appears to be slightly yellowish white light, that is, low color temperature white light, and natural white light. There is still a gap.

Because the blue light materials used in OLEDs have low luminous efficiency, poor stability, and only one-hundredth of the life of red or green materials, OLED lamps are difficult to meet practical applications in blue light, white light illumination or service life. Demand. On the other hand, when the luminaire is used in a variety of different contexts, there will be a need for different light colors. How to make the lamps can be arbitrarily adjusted to the desired color of light is also a very important topic. Therefore, a light source module having a compensated spectral distribution and a tonable function is required to overcome the above disadvantages to achieve the goal.

One of the objects of the present invention is to provide a light source module to solve the limitation of OLED lamps in blue light, white light illumination or service life.

Another object of the present invention is to provide a light source module that meets the needs of different light colors when the luminaire is used in a variety of different contexts.

To achieve the above objective, the present invention provides a light source module comprising: a first light emitting unit for providing a first light source, the first light source having a plurality of different colors, and the first light source having a first spectral distribution; a second light emitting unit is configured to provide a second light source, the second light source has a single color, and the second light source has a second spectral distribution; wherein the second spectral distribution is used to compensate the first spectral distribution.

In order to achieve the above objective, the present invention provides a light source module, comprising: a light guide plate, comprising a first light incident surface, a second light incident surface, and a light exiting surface, wherein the first light incident surface is opposite to the light emitting surface, and The second light incident surface is respectively connected to the first light incident surface and the light exit surface; a first light emitting unit facing the first light incident surface for providing a first light source, wherein the first light source has a plurality of different colors, and the first light source An illumination unit includes an organic light emitting diode unit; and a second light emitting unit facing the second light incident surface for providing a second light source, wherein the second light source has at least one color, and the second light emitting unit includes at least A light emitting diode unit.

The present invention will be further understood by those of ordinary skill in the art to which the present invention pertains. .

Please refer to Figure 2. 2 is a schematic view of a light source module according to a first preferred embodiment of the present invention. As shown in FIG. 2, the light source module 100 of the present embodiment includes a first light emitting unit 110 for providing a first light source 112, and a second light emitting unit 120 for providing a second light source 122. The first light source 112 has a plurality of different colors, and the second light source 122 is composed of a single color. The first light source 112 and the second light source 122 are mixed to form the outgoing light 132.

The light source module of the present invention is not limited to the above embodiments, but may have other different implementations. In the following, in the other preferred embodiments of the present invention, the same elements are denoted by the same reference numerals, and only the differences of the embodiments are described in detail.

Please refer to Figure 3. 3 is a schematic view of a light source module according to a second preferred embodiment of the present invention. As shown in FIG. 3, the light source module 200 of the present embodiment further includes a light guide plate 130. The light guide plate 130 includes a first light incident surface 134, a second light incident surface 136, and a light exit surface 138, wherein the first light incident surface 134 The second light incident surface 136 is connected to the first light incident surface 134 and the light exit surface 138, respectively, opposite to the light exit surface 138. That is, in the present embodiment, the first light incident surface 134 is the upper surface of the light guide plate 130, the second light incident surface 136 is the side surface of the light guide plate 130, and the light exit surface 138 is the lower surface of the light guide plate 130. The first light emitting unit 110 faces the first light incident surface 134 , and the second light emitting unit 120 faces the second light incident surface 136 . The first light source 112 and the second light source 122 respectively enter the light guide plate 130 from the first light incident surface 134 and the second light incident surface 136, and are mixed to form the outgoing light 132, and the light emitting surface 138 faces the object to be illuminated.

Please refer to Figures 4 to 5 and refer to Figures 2 and 3 together. 4 is a spectral distribution diagram of a first embodiment of a light source module according to first and second preferred embodiments of the present invention, and FIG. 5 is a light source module of the first and second preferred embodiments of the present invention. A spectral distribution map of the second embodiment of the group. As shown in FIG. 4, the first light source 112 has a plurality of different colors, and the first light source 112 has a first spectral distribution SP1; the second light source 122 is composed of a single color, and the second light source has a second spectral distribution SP2. . The first spectral distribution SP1 of the first light source 112 and the second spectral distribution SP2 of the second light source 122 are mixed to form the outgoing light 132 having a third spectral distribution SP3, and the CRI of the outgoing light 132 is greater than the CRI and the first of the first light source 112. The CRI of the two light sources 122. Similarly, as shown in FIG. 5, the first light source 112 has a plurality of different colors, and the first light source 112 has a first spectral distribution SP1; the second light source 122 is composed of a single color, and the second light source has a second color. Spectral distribution SP2. The first spectral distribution SP1 of the first light source 112 and the second spectral distribution SP2 of the second light source 122 are mixed to form the outgoing light 132 having a third spectral distribution SP3, and the CRI of the outgoing light 132 is greater than the CRI and the first of the first light source 112. The CRI of the two light sources 122.

The light source modules 100, 200 of the first and second preferred embodiments of the present invention can have the following different implementations. For example, as shown in FIG. 4, the light source module 100, 200 of the first embodiment, wherein a single color (for example, blue) of the second light source 122 and a plurality of different colors of the first light source 112 (for example, red, green, and blue) One of the colors is the same color and can be used to compensate for defects in one of the colors (eg, blue) of the first light source 112, such as lower luminous efficiency, poor stability, shorter life, etc., thereby allowing mixing The post-exposed outgoing light 132 reaches the desired color (eg, white).

For example, as shown in FIG. 5, the light source module 100, 200 of the second embodiment, wherein a single color (for example, blue) of the second light source 122 is different from a plurality of colors (for example, red and green) of the first light source 112. The color can be used to compensate for the lack of color (e.g., blue) of the first source 112, thereby allowing the exiting light 132 formed after mixing to achieve the desired color (e.g., white).

Furthermore, as shown in FIG. 4 or FIG. 5, the light source modules 100, 200 of the first and second preferred embodiments, wherein the first light emitting unit 110 can include an organic light emitting diode unit, and the second light emitting unit 120 A light emitting diode (LED) unit can be included. Because the blue light materials used in OLEDs have low luminous efficiency and poor stability, the lifetime is only one percent of red or green materials, and the deep blue light emitted by LEDs can complement the efficiency and stability of OLED blue light materials. Defects in life. Therefore, such a combination (OLED+LED) has a better effect on light color than combining only OLED or LED itself (OLED+OLED or LED+LED). For example, as shown in FIG. 1, even when the object is illuminated by white light emitted by a high power efficiency OLED, the naked eye still appears to be slightly yellowish white light, that is, low color temperature white light. When the object is illuminated with this light, it does not necessarily produce a completely natural color. At this time, if the above combination (OLED+LED) is changed, as shown in FIG. 4 or FIG. 5, a better light color effect can be achieved.

As can be seen from the above, the light source modules 100 and 200 of the first and second preferred embodiments combine the first light source 112 of the first light emitting unit 110 and the second light source 122 of the second light emitting unit 120 to form the outgoing light 132. The first light source 112 has a plurality of different colors and has a first spectral distribution SP1, and the second light source 122 is composed of a single color and has a second spectral distribution SP2. The first spectral distribution SP1 of the first light source 112 and the second spectral distribution SP2 of the second light source 122 are mixed to form a third spectral distribution SP3 of the outgoing light 132, and the CRI of the outgoing light 132 is greater than the CRI and the first of the first light source 112. The CRI of the two light sources 122. In this way, the defect or deficiency of the color of the first light source 112 can be compensated for, for example, lower luminous efficiency, poor stability, short life, etc., so that the emitted light 132 formed after mixing can reach the desired color of light. .

The light source module 200 of the second preferred embodiment of the present invention may have the following different implementation modes. Please refer to Figure 6. Figure 6 is a view showing a spectral distribution of a third embodiment of a light source module according to a second preferred embodiment of the present invention. As shown in FIG. 6 , in the light source module 200 of the third embodiment, the first light emitting unit 110 may include an organic light emitting diode unit, and the first light source 112 has a plurality of different colors, and the second light emitting unit 120 may include At least one light emitting diode unit, and the second light source 122 has at least one color, wherein at least one color (eg, blue) of the second light source 122 is different from the first light source 112 (eg, red, green, and blue) One of them is of the same color and can be used to compensate for defects in one of the colors (eg, blue) of the first light source 112 (eg, lower luminous efficiency, poor stability, shorter life, etc.), thereby allowing mixing The post-exposed outgoing light 132 reaches the desired color (eg, white). At this time, if the second light source 122 further contains another color (for example, green), the outgoing light 132 can be made to reach the desired color (for example, bright green).

Please refer to Figure 7. Figure 7 is a view showing a spectral distribution of a fourth embodiment of a light source module according to a second preferred embodiment of the present invention. As shown in FIG. 7, the light source module 200 of the fourth embodiment, wherein at least one color (for example, blue) of the second light source 122 and the plurality of colors (for example, red and green) of the first light source 112 are different colors It can be used to compensate for the lack of color (for example, blue) of the first light source 112, so that the outgoing light 132 formed after mixing reaches the desired color (for example, white). At this time, if the second light source 122 further contains another color (for example, green), the outgoing light 132 can be made to reach the desired color (for example, bright green).

Different from the foregoing first and second embodiments, the second light source 122 of the light source module 200 of the third and fourth embodiments has at least one color, that is, the second light source 122 can have a single color or multiple colors. The second light source 122 of the light source module 200 of the first and second embodiments described above is composed of a single color.

As can be seen from the above, the light source module 200 of the third and fourth embodiments of the second preferred embodiment is configured such that the first light-emitting unit 110 (for example, an organic light-emitting diode unit) faces the first light of the light guide plate 130. The surface 134 is used to provide the first light source 112, and the second light emitting unit 120 (for example, a light emitting diode unit) faces the second light incident surface 136 of the light guide plate 130 for providing the second light source 122. The first light source 112 has a plurality of different colors, and the second light source 122 has at least one color. The first light source 112 and the second light source 122 respectively enter the light guide plate 130 from the first light incident surface 134 and the second light incident surface 136, and are mixed to form the outgoing light 132, and the light emitting surface 138 faces the object to be illuminated. The second light source 122 can compensate for the defects of the color of the first light source 112 (for example, lower luminous efficiency, poor stability, shorter life, etc.) or insufficient, so that the emitted light 132 formed after mixing can reach the desired light. color. At this time, if the second light source 122 further contains another color, the outgoing light 132 can be made to reach the desired color of the light.

In summary, the light source module of the present invention provides two sets of independent light sources by using two light emitting units, and mixes the two sets of light sources to form an outgoing light to compensate for defects of the color of one of the light sources (for example, lower ones). Light-emitting efficiency, poor stability, short life, etc.) or insufficient, so that the emitted light formed after mixing reaches the desired light color, which enhances the effect of OLED lamps on blue and white lighting and solves their service life. The upper limit. In addition, the light source module of the invention has the function of modulating the color of the light, and satisfies the requirement of different light colors of the luminaire in various different situations. The light source module of the present invention is not limited to application to illumination, and can also be applied to other fields such as a backlight module of a liquid crystal display.

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.

100. . . Light source module

110. . . First lighting unit

112. . . First light source

120. . . Second lighting unit

122. . . Second light source

130. . . Light guide

132. . . Exit light

134. . . First entrance surface

136. . . Second entrance surface

138. . . Glossy surface

200. . . Light source module

SP1. . . First spectral distribution

SP2. . . Second spectral distribution

SP3. . . Third spectral distribution

Figure 1 is a spectral distribution of a white organic light-emitting diode.

2 is a schematic view of a light source module according to a first preferred embodiment of the present invention.

3 is a schematic view of a light source module according to a second preferred embodiment of the present invention.

Fig. 4 is a view showing the spectral distribution of the first embodiment of the light source module of the first and second preferred embodiments of the present invention.

Fig. 5 is a view showing the spectral distribution of the second embodiment of the light source module of the first and second preferred embodiments of the present invention.

Figure 6 is a view showing a spectral distribution of a third embodiment of a light source module according to a second preferred embodiment of the present invention.

Figure 7 is a view showing a spectral distribution of a fourth embodiment of a light source module according to a second preferred embodiment of the present invention.

110. . . First lighting unit

112. . . First light source

120. . . Second lighting unit

122. . . Second light source

130. . . Light guide

132. . . Exit light

134. . . First entrance surface

136. . . Second entrance surface

138. . . Glossy surface

200. . . Light source module

Claims (14)

A light source module includes: a first light emitting unit, configured to provide a first light source, the first light source has a plurality of different colors, and the first light source has a first spectral distribution; and a second light emitting unit, The second light source has a single color, and the second light source has a second spectral distribution; wherein the second spectral distribution is used to compensate the first spectral distribution. The light source module of claim 1, wherein the single color of the second light source and the one of the colors of the first light source are the same color. The light source module of claim 2, wherein the single color of the second light source is blue, and the colors of the first light source comprise red, green, and blue. The light source module of claim 1, wherein the single color of the second light source and the color of the first light source are different colors. The light source module of claim 4, wherein the single color of the second light source is blue, and the colors of the first light source comprise red and green. The light source module of claim 1, wherein the first light emitting unit comprises an organic light emitting diode unit, and the second light emitting unit comprises a light emitting diode unit. The light source module of claim 1, further comprising a light guide plate, wherein the light guide plate comprises a first light incident surface, a second light incident surface and a light exiting surface, wherein the first light incident surface and the light emitting surface In contrast, the second light incident surface is connected to the first light incident surface and the light exit surface. The light source module of claim 7, wherein the first light emitting unit faces the first light incident surface, and the second light emitting unit faces the second light incident surface. A light source module includes: a light guide plate, comprising a first light incident surface, a second light incident surface, and a light exiting surface, wherein the first light incident surface is opposite to the light emitting surface, and the second light entering The first light-emitting surface is opposite to the light-emitting surface; a first light-emitting unit facing the first light-incident surface for providing a first light source, wherein the first light source has a plurality of different colors, and the The first light emitting unit includes an organic light emitting diode unit; and a second light emitting unit facing the second light incident surface for providing a second light source, wherein the second light source has at least one color, and the second The light emitting unit includes at least one light emitting diode unit. The light source module of claim 9, wherein the at least one color of the second light source is the same color as one of the colors of the first light source. The light source module of claim 10, wherein the at least one color of the second light source is blue, and the colors of the first light source comprise red, green, and blue. The light source module of claim 9, wherein the at least one color of the second light source and the color of the first light source are different colors. The light source module of claim 12, wherein the at least one color of the second light source is blue, and the colors of the first light source comprise red and green. The light source module of claim 9, wherein the second light source has a plurality of different colors.