TWI497170B - Light emitting device - Google Patents

Description

Illuminating device

The invention relates to a light-emitting device, in particular to a light-emitting device suitable for miniaturization and high color rendering capability design.

Due to the rapid development of modern technology, liquid crystal displays (LCDs) have become ubiquitous in daily life, from small-sized mobile phones, digital cameras, medium-sized tablets, notebook computers, to large-size LCD TVs. Can be seen. A liquid crystal display can be roughly divided into two parts, that is, a liquid crystal module closer to a user (or a viewer) and a backlight module at the rear. The main function of the backlight module is to provide a high brightness and high uniformity of the front liquid crystal module. Surface light source. The display is composed of hundreds of thousands to millions of pixels, and each pixel is composed of three sub-pixels, including red and green. Blue three colors.

At present, the light source used as a backlight module is often used, and there are a cold cathode tube and a light emitting diode (LED). LED is a kind of light-emitting element made by epitaxial growth technology and semiconductor material. It has many advantages such as small size, long life, sturdy and durable (not easy to break), and environmental protection. In general, LEDs of red, green, and blue colors can be directly configured into a single pixel to obtain a wider color gamut. However, the size of such a design cannot be miniaturized, so that multiple pixels cannot be arranged at a high density. In order to achieve a more delicate picture; or directly, the red, green and blue phosphors can be arranged on an LED that emits ultraviolet light, and then packaged into a light source to emit white light. However, when the red, green, and blue LEDs are disposed in a small area, adjacent LEDs will crosstalk when the phosphor is excited, which affects the color rendering capability of the display.

The present invention provides a light-emitting device suitable for miniaturization design and high color rendering capability to solve the above problems.

According to an embodiment, a light emitting device of the present invention includes a light emitting module, an optical module, at least a first wavelength conversion structure, and at least a second wavelength conversion structure. The light emitting module includes a carrier substrate and N light emitting structures, wherein N is a positive integer greater than two. The carrier substrate includes a first surface and a second surface, the first surface is opposite to the second surface, and the N light emitting structures are disposed on the first surface. The optical module includes a transparent substrate, N lens structures, and N light transmissive openings. The transparent substrate includes a third surface and a fourth surface, the third surface is opposite to the fourth surface, the N lens structures are disposed on the third surface, and the N light transmissive openings are respectively disposed on the fourth surface corresponding to the N lens structures on. Each of the light emitting structures corresponds to one of the N lens structures and one of the N light transmissive openings. The optical module is disposed opposite the light emitting module such that the third surface faces the second surface, and a gap exists between the third surface and the second surface. The at least one first wavelength conversion structure is disposed on at least one of the N light transmissive openings. At least one second wavelength conversion structure is disposed on at least one of the N light transmissive openings.

Preferably, the light emitting device further comprises at least one third wavelength conversion structure disposed on at least one of the N light transmissive openings.

Preferably, the N light emitting structures emit ultraviolet light, and the at least one first wavelength converting structure, the at least one second wavelength converting structure and the at least one third wavelength converting structure are respectively at least one red light converting structure and at least one green light converting structure. And at least one blue light conversion structure.

Preferably, the N light emitting structures emit blue light, N is a positive integer greater than 3, and the at least one first wavelength converting structure, the at least one second wavelength converting structure, and the at least one third wavelength converting structure are respectively at least one red light converting a structure, at least one green light conversion structure, and at least one yellow light conversion structure.

Preferably, the N light emitting structures emit blue light, and the at least one first wavelength converting structure and the at least one second wavelength converting structure are respectively at least one red light converting structure and at least one green light converting structure, and the light emitting device further comprises at least one scattering structure. And disposed on at least one of the N light-transmissive openings.

Preferably, the optical module further comprises a light absorbing layer disposed on the transparent substrate and covering N lens structures and regions other than N light transmissive openings.

In summary, the present invention is configured such that the optical module having the lens structure and the light-transmissive opening is disposed opposite to the light-emitting module, so that there is a gap between the optical module and the light-emitting module, and the type of light emitted according to the light-emitting structure is transparent. A corresponding wavelength conversion structure is disposed on the light opening. Thereby, the light emitted by the light emitting structure can enter the lens structure through the gap between the optical module and the light emitting module, and the light is collected by the lens structure to the light transmitting opening, and the light is projected through the light transmitting opening, thereby exciting the wavelength conversion. Structure that changes the color of the light emitted by the illuminating structure. Since the light absorbing layer disposed on the transparent substrate covers the area other than the lens structure and the light-transmissive opening, the stray light emitted by the adjacent light-emitting structure can be effectively absorbed, thereby preventing mutual interference of stray light. Since the wavelength conversion structure is disposed on the optical module, the present invention can arrange a plurality of light emitting structures emitting the same color light (for example, ultraviolet light or blue light) on the same tiny carrier substrate (for example, 1 mm*1 mm), so that The light-emitting device of the present invention is suitable for miniaturization and high color rendering capability.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1, 3, 4, 5, 6, 7‧‧‧ illuminating devices

10‧‧‧Lighting module

12‧‧‧Optical module

14‧‧‧First wavelength conversion structure

16‧‧‧second wavelength conversion structure

18‧‧‧ Third wavelength conversion structure

20, 20'‧‧‧ bottom plate

22‧‧‧Support

24‧‧‧Protective layer

40‧‧‧scatter structure

100‧‧‧bearing substrate

102, 102'‧‧‧Lighting structure

120‧‧‧Transparent substrate

122‧‧‧Lens structure

124‧‧‧Light opening

126‧‧‧ Groove

128‧‧‧Light absorbing layer

130‧‧‧reflective layer

200‧‧‧electrode pad pair

202‧‧‧First electrode pad

204‧‧‧Second electrode pad

1020‧‧‧ positive

1020'‧‧‧ first electrode

1022‧‧‧negative

1022'‧‧‧second electrode

1024‧‧‧Lighting area

2000‧‧‧positive electrode pad

2002‧‧‧Negative electrode pad

A‧‧‧ optical axis

D1‧‧‧opening area

D2‧‧‧ bottom area

G‧‧‧ gap

L‧‧‧Light

S1‧‧‧ first surface

S2‧‧‧ second surface

S3‧‧‧ third surface

S4‧‧‧ fourth surface

Fig. 1 is a schematic view of a light-emitting device according to a first embodiment of the present invention.

Fig. 2 is a plan view showing the light-emitting structure of Fig. 1 arranged on the bottom plate.

3 to 4 are schematic views showing the light-emitting process of the light-emitting device of Fig. 1.

Fig. 5 is a plan view showing a light-emitting structure disposed on a bottom plate according to a second embodiment of the present invention.

Fig. 6 is a schematic view of a light-emitting device according to a third embodiment of the present invention.

Figure 7 is a schematic view of a light-emitting device according to a fourth embodiment of the present invention.

Figure 8 is a schematic view of a light-emitting device according to a fifth embodiment of the present invention.

Figure 9 is a schematic view of a light-emitting device according to a sixth embodiment of the present invention.

Figure 10 is a schematic view of a light-emitting device according to a seventh embodiment of the present invention.

Figure 11 is a diagram showing a plurality of light-emitting modules arranged in an array at the bottom according to the eighth embodiment of the present invention. Top view of the board.

1 and 2, FIG. 1 is a schematic view of a light-emitting device 1 according to a first embodiment of the present invention, and FIG. 2 is a plan view showing a light-emitting structure 102 of FIG. 1 disposed on a bottom plate 20. The illuminating device 1 can be used as a backlight module of the display, but is not limited thereto. As shown in FIG. 1 , the light-emitting device 1 includes a light-emitting module 10 , an optical module 12 , at least one first wavelength conversion structure 14 , at least one second wavelength conversion structure 16 , and at least a third wavelength conversion structure 18 . A bottom plate 20, a plurality of support members 22 and a protective layer 24.

The light emitting module 10 includes a carrier substrate 100 and N light emitting structures 102, wherein N is a positive integer greater than two. The carrier substrate 100 includes a first surface S1 and a second surface S2, wherein the first surface S1 is opposite to the second surface S2, and the light emitting structure 102 is disposed on the first surface S1. The carrier substrate 100 can be a sapphire substrate, but is not limited thereto. The three light-emitting structures 102 (that is, N=3) are illustrated in FIG. 1 to illustrate the technical features of the present invention. However, the present invention can also configure three or more light-emitting structures 102 on the carrier substrate 100 according to actual needs. In addition, the light emitting structure 102 can be an epitaxial structure of the light emitting diode. The present invention can perform epitaxial growth on a large number of carrier substrates to form a plurality of light emitting structures 102, wherein the epitaxial growth technique is well known to those skilled in the art and will not be described herein. Next, the three light-emitting structures 102 are cut in one unit to form the light-emitting module 10 as shown in FIG. In other words, the present invention can form the light-emitting module 10 instead of disposing three independent light-emitting diode wafers on the carrier substrate 100, and the miniaturization of the size of the light-emitting module 10 can be achieved.

The optical module 12 includes a transparent substrate 120, N lens structures 122, N light transmissive openings 124, N grooves 126, a light absorbing layer 128, and a reflective layer 130. In this embodiment, the number of lens structures 122, light transmissive openings 124 and recesses 126 corresponds to the number of light emitting structures 102, that is, N=3. The transparent substrate 120 includes a third surface S3 and a fourth surface S4, wherein the third surface S3 is opposite to the fourth surface S4, the lens structure 122 is disposed on the third surface S3, and the light-transmitting openings 124 are respectively configured corresponding to the lens structure 122. On the fourth surface S4. In this embodiment, the grooves 126 are formed on the fourth surface S4, and each of the light-transmissive openings 124 is disposed in the corresponding groove 126. The transparent substrate 120 may be made of cerium oxide (SiO ₂ ), silicone, epoxy or polymethylmethacrylate (PMMA), but is not limited thereto. Therefore, the lens structure 122 and the recess 126 can be integrally formed on the transparent substrate 120 by injection molding or compression molding.

The optical module 12 is disposed opposite to the light emitting module 10 such that the third surface S3 faces the second surface S2, and a gap G exists between the third surface S3 and the second surface S2. In this embodiment, the light emitting module 10 is disposed on the bottom plate 20 and electrically connected to the bottom plate 20 . The support member 22 connects the third surface S3 of the transparent substrate 120 and the bottom plate 20 to support the optical module 12 above the light emitting module 10 such that a gap G exists between the third surface S3 and the second surface S2. After the optical module 12 and the light emitting module 10 are disposed opposite each other, each of the light emitting structures 102 corresponds to one of the lens structures 122 and one of the light transmitting openings 124. In addition, each of the light emitting structures 102 is disposed on the optical axis A of the corresponding lens structure 122 such that the light L emitted by each of the light emitting structures 102 can enter the corresponding lens structure 122 along the optical axis A. In this embodiment, the three lens structures 122 are disposed on the third surface S3 of the transparent substrate 120 in a non-coplanar manner such that the optical axes A of the three lens structures 122 are not parallel to each other, thereby allowing the light emitting structure 102 to be More densely arranged, the size of the light-emitting device 1 can be further reduced.

The backplane 20 can be a circuit board, an aluminum substrate, an FR4 substrate, or other substrate. As shown in FIG. 1 , the support member 22 and the transparent substrate 120 may be integrally formed, and one end of the support member 22 may be connected to the bottom plate 20 by fastening, bonding, welding, riveting or the like. It should be noted that the support member 22 can also be a separate component, and the two ends of the support member 22 can be respectively connected to the third surface S3 and the bottom plate 20 of the transparent substrate 120 by means of snapping, bonding, soldering, riveting or the like.

As shown in FIG. 2, each of the light emitting structures 102 includes a positive electrode 1020 and a negative electrode 1022, and the bottom plate 20 includes an N-pair electrode pad pair 200 disposed thereon, wherein each of the electrode pad pairs 200 includes a positive electrode pad 2000 and A negative electrode pad 2002. In this embodiment, the number of electrode pad pairs 200 corresponds to the number of light emitting structures 102, that is, N=3. The positive electrode 1020 and the negative electrode 1022 of each of the light-emitting structures 102 respectively correspond to the positive electrode pad 2000 and the negative electrode disposed on the bottom plate 20 On the pole pad 2002, the light emitting structure 102 is electrically connected to the corresponding electrode pad pair 200 to emit light. In addition, each of the light-emitting structures 102 further includes a light-emitting region 1024. The light-emitting region 1024 can be dislocated in a non-collinear manner on the first surface S1 of the carrier substrate 100 by using a semiconductor process such as yellow light or etching. The phenomenon of crosstalk occurs when the adjacent light emitting structure 102 emits light. It should be noted that the positional relationship between the positive electrode 1020, the negative electrode 1022 and the light-emitting region 1024 of each of the light-emitting structures 102 is well known to those skilled in the art, and is not limited to the embodiment illustrated in FIG.

The light absorbing layer 128 is disposed on the transparent substrate 120 and covers a region other than the lens structure 122, the light transmitting opening 124, and the groove 126. The reflective layer 130 is disposed on the recess 126 and covers a region other than the light-transmitting opening 124. The absorption band of the light absorbing layer 128 is a visible light region or an ultraviolet light region, and the material may be a dark light absorbing paint (for example, a dark resin), and the material of the reflective layer 130 may be a metal having a good reflectance (for example, silver). The protective layer 24 is disposed on the bottom plate 20 and the light emitting module 10 to prevent oxidation of the electrodes of the light emitting module 10 and protect the light emitting module 10. The material of the protective layer 24 may be a colloid such as a resin or an epoxy resin, and is formed on the bottom plate 20 and the light emitting module 10 by spraying or compression molding.

The first wavelength conversion structure 14 , the second wavelength conversion structure 16 , and the third wavelength conversion structure 18 are respectively disposed in one of the three recesses 126 and are respectively disposed on one of the three light transmissive openings 124 . In this embodiment, the three light-emitting structures 102 can emit ultraviolet light. Therefore, the first wavelength conversion structure 14, the second wavelength conversion structure 16, and the third wavelength conversion structure 18 can respectively be a red light conversion structure and a green light conversion. Structure and blue light conversion structure. The first wavelength conversion structure 14, the second wavelength conversion structure 16, and the third wavelength conversion structure 18 may be made of a transparent colloid (for example, tantalum resin or epoxy resin) with red phosphor powder, green phosphor powder, and blue phosphor powder, respectively. It is made by mixing and is disposed in the corresponding groove 126 by dispensing or compression molding. In addition, the first wavelength conversion structure 14 , the second wavelength conversion structure 16 , and the third wavelength conversion structure 18 may also be red fluorescent patches, green fluorescent patches, and blue fluorescent patches, and are disposed in a corresponding manner in a corresponding manner. Inside the recess 126.

Please refer to FIG. 3 to FIG. 4 , and FIG. 3 to FIG. 4 are the light-emitting devices in FIG. 1 . A schematic diagram of the illuminating process of 1. As shown in FIG. 1 and FIG. 3 , when the light emitting structure 102 is driven to emit light, the light L emitted by the light emitting structure 102 can enter the corresponding optical axis A via the gap G between the optical module 12 and the light emitting module 10 . Lens structure 122. Next, as shown in FIG. 4, since the lens structure 122 has a light collecting function, the lens structure 122 can collect the light rays L to the corresponding light transmitting openings 124, respectively. Finally, the light L is further projected through the light-transmitting opening 124, thereby exciting the first wavelength conversion structure 14, the second wavelength conversion structure 16, and the third wavelength conversion structure 18, and emitting red light, green light, and blue light by using multiple light. Color to achieve high light-emitting efficiency. Moreover, since the light L emits a plurality of light colors through the different light-transmissive openings 124, the mutual interference between the light colors is greatly reduced. The light absorbing layer 128 disposed on the transparent substrate 120 covers the area other than the lens structure 122, the light transmitting opening 124 and the groove 126, and the light absorbing layer 128 can effectively absorb the stray light emitted by the adjacent light emitting structure 102, thereby preventing mutual stray light. interference. In addition, the opening area D1 of each of the light-transmitting openings 124 may be smaller than the bottom area D2 of the corresponding lens structure 122 to avoid mutual interference of stray light. Moreover, the reflective layer 130 disposed on the recess 126 can reflect a portion of the light that is struck around the recess 126, thereby increasing the overall light extraction efficiency of the light-emitting device 1. Since the first wavelength conversion structure 14 , the second wavelength conversion structure 16 , and the third wavelength conversion structure 18 are disposed on the optical module 12 , the present invention can configure a plurality of light emitting structures 102 that emit light of the same color (eg, ultraviolet light). On the same minute carrier substrate 100 (for example, 1 mm * 1 mm), the light-emitting device 1 of the present invention is suitable for miniaturization and high color rendering capability.

In this embodiment, the light-emitting areas of the light-emitting regions 1024 of the three light-emitting structures 102 may be the same or different, and the open areas D1 of the three light-transmitting openings 124 may be the same or different, and the numerical apertures of the three lens structures 122. (numerical aperture, NA) may be the same or different. In other words, the present invention can adjust the light-emitting area of the light-emitting region 1024 of each of the light-emitting structures 102, the opening area D1 of the light-transmitting opening 124, and/or the numerical aperture of the lens structure 122 according to the required light-emitting efficiency and light-emitting effect. In this embodiment, all of the three light emitting structures 102 can emit ultraviolet light, and the ultraviolet light has the best excitation efficiency for the blue light conversion structure, the second is the excitation efficiency for the green light conversion structure, and the most efficient for the red light conversion structure. difference. If the light-emitting areas of the light-emitting regions 1024 of the three light-emitting structures 102 are the same, The ratio of the opening area D1 of the three light-transmissive openings 124 corresponding to the blue light conversion structure, the green light conversion structure and the red light conversion structure may be 0.5:0.7:1. If the opening areas D1 of the three light-transmitting openings 124 are the same, the ratio of the light-emitting areas of the light-emitting areas 1024 of the three light-emitting structures 102 corresponding to the blue light-converting structure, the green light-converting structure, and the red light-converting structure may be 0.5:0.7: 1, this will make the light color more uniform, and will not be biased towards a certain light color.

Referring to FIG. 2, please refer to FIG. 5. FIG. 5 is a plan view showing the light emitting structure 102' disposed on the bottom plate 20' according to the second embodiment of the present invention. The main difference between the light emitting structure 120 ′ and the light emitting structure 120 described above is that each of the light emitting structures 120 ′ includes a first electrode 1020 ′ and one electrically opposite to the first electrode 1020 ′ and shared with other light emitting structures 120 ′. The second electrode 1022' is different from the bottom plate 20 described above in that the bottom plate 20' includes N first electrode pads 202 and a second electrode electrically opposite to the N first electrode pads 202. Pad 204. In this embodiment, the number of first electrode pads 202 corresponds to the number of light emitting structures 102, that is, N=3. As shown in FIG. 5, the first electrode 1020' and the common second electrode 1022' of the light-emitting structure 102' are respectively disposed on the first electrode pad 202 and the second electrode pad 204 of the bottom plate 20' to cause light emission. The structure 102' is electrically connected to the first and second electrode pads 202, 204 to emit light. In this embodiment, the first electrode 1020 ′, the first electrode pad 202 can be a positive electrode, and the second electrode 1022 ′ and the second electrode pad 204 can be a negative electrode. In addition to allowing the light-emitting structure 102' to be more densely arranged, such a design allows the size of the light-emitting device 1 to be further reduced, and also reduces process cost and avoids complicated circuit design. It should be noted that the components of the same reference numerals as those shown in FIG. 2 are substantially the same, and will not be described again. In addition, the positional relationship between the first electrode 1020', the second electrode 1022' and the light-emitting region 1024 of each of the light-emitting structures 102' is well known to those skilled in the art, and the embodiment not shown in FIG. limit.

Referring to Fig. 1, reference is made to Fig. 6, which is a schematic view of a light-emitting device 3 according to a third embodiment of the present invention. The main difference between the illuminating device 3 and the illuminating device 1 is that the supporting member 22 of the illuminating device 3 connects the third surface S3 of the transparent substrate 120 and the second surface S2 of the carrying substrate 100 to support the optical module 12 Above the light emitting module 10, so that the third surface S3 There is a gap G between the second surface S2 and the second surface S2. In other words, the present invention can selectively connect the support member 22 to the second surface S2 of the carrier substrate 100 or connect the support member 22 to the bottom plate 20 as described above, depending on the application. It should be noted that the components of the same reference numerals as those shown in FIG. 1 are substantially the same, and will not be described again.

Referring to Fig. 1, reference is made to Fig. 7, which is a schematic view of a light-emitting device 4 according to a fourth embodiment of the present invention. The main difference between the light-emitting device 4 and the above-described light-emitting device 1 is that the light-emitting structure 102 of the light-emitting device 4 emits blue light. When the light emitting structure 102 emits blue light, it is not necessary to excite blue light by the blue light converting structure. The light-emitting device 4 further includes at least one scattering structure 40 disposed on at least one of the light-transmitting openings 124 instead of the third wavelength-converting structure 18 described above, but is selectively configurable, and is not limited thereto. At this time, the blue light emitted by the light emitting structure 102 can be scattered by the scattering structure 40 to increase the light exit angle. The scattering structure 40 may be composed of titanium dioxide (TiO ₂ ), ruthenium resin or other fine particles. It should be noted that the components of the same reference numerals as those shown in FIG. 1 have substantially the same operation principle, and are not described herein again.

Referring to Fig. 7, reference is made to Fig. 8, which is a schematic view of a light-emitting device 5 according to a fifth embodiment of the present invention. The main difference between the illuminating device 5 and the illuminating device 4 described above is that the illuminating device 5 includes four illuminating structures 102, a first wavelength converting structure 14, a second wavelength converting structure 16, and a third wavelength converting structure 18, wherein the illuminating device 5 The structure 102 emits blue light, and the first wavelength conversion structure 14, the second wavelength conversion structure 16, and the third wavelength conversion structure 18 are a red light conversion structure, a green light conversion structure, and a yellow light conversion structure, respectively. In other words, the first wavelength conversion structure 14 , the second wavelength conversion structure 16 , and the third wavelength conversion structure 18 respectively excite the blue light emitted by the light emitting structure 102 into red light, green light, and yellow light, and then cooperate with the light emitting structure. The blue light emitted by 102 is scattered, and the desired color of the light can be modulated by red, green, blue, and yellow light, which will make the light color more saturated. The light-emitting device 5 further includes a scattering structure 40, which can be matched with the blue light emitted by the light-emitting structure 102, so that the light-emitting angle of the blue light can be larger, but can be selectively configured, and is not limited thereto. It should be noted that the components of the same reference numerals as those shown in FIG. 8 have substantially the same operation principle, and are not described herein again.

Referring to Fig. 1, reference is made to Fig. 9, which is a schematic view of a light-emitting device 6 according to a sixth embodiment of the present invention. The main difference between the illuminating device 6 and the above illuminating device 1 is that the optical module 10 of the illuminating device 6 does not include the above-mentioned groove 126 and reflective layer 130. Therefore, the light-transmitting opening 124 is directly disposed on the fourth surface S4 of the transparent substrate 120, and the light-absorbing layer 128 covers a region other than the lens structure 122 and the light-transmitting opening 124. In other words, the present invention can selectively dispose the light-transmissive opening 124 directly on the fourth surface S4 of the transparent substrate 120, or form the above-mentioned groove 126 on the fourth surface S4 of the transparent substrate 120, and then the transparent opening 124. It is disposed in the recess 126 depending on the actual application. It should be noted that the components of the same reference numerals as those shown in FIG. 1 in FIG. 9 have substantially the same principle of operation, and are not described herein again.

Referring to Fig. 1, reference is made to Fig. 10, which is a schematic view of a light-emitting device 7 according to a seventh embodiment of the present invention. The main difference between the illuminating device 7 and the illuminating device 1 described above is that the optical axes A of the three lens structures 122 of the illuminating device 7 are parallel to each other such that each of the illuminating structures 102 is disposed directly below the corresponding lens structure 122. The light-emitting structure 102 having the directivity of the light-emitting device 7 will have a better brightness. In other words, the present invention can adjust the tilt angle of the optical axis A of each lens structure 122 according to the arrangement position of the light emitting structure 102, so that each of the light emitting structures 102 can be disposed on the optical axis A of the corresponding lens structure 122, so as to enter The light L of the lens structure 122 has a high light-in efficiency. It should be noted that the components of the same reference numerals as those shown in FIG. 1 are substantially the same, and will not be described again.

Referring to FIG. 2, referring to FIG. 11, FIG. 11 is a plan view showing a plurality of light-emitting modules 10 arranged in an array on the bottom plate 20 according to the eighth embodiment of the present invention. As shown in FIG. 11, the present invention can arrange a plurality of light-emitting modules 10 in an array on a single bottom plate 20 for array light-emitting. It should be noted that, in the present invention, the plurality of lens structures 122 and the plurality of light-transmissive openings 124 may be arranged in an array on the single transparent substrate 120, and the transparent substrate 120 may be connected at an appropriate position by the plurality of support members 22. With the bottom plate 20 to improve assembly efficiency.

In summary, the present invention is configured such that the optical module having the lens structure and the light-transmissive opening is disposed opposite to the light-emitting module, so that there is a gap between the optical module and the light-emitting module, and according to the light-emitting structure The emitted light type is configured with a corresponding wavelength conversion structure on the light-transmissive opening. Thereby, the light emitted by the light emitting structure can enter the lens structure through the gap between the optical module and the light emitting module, and the light is collected by the lens structure to the light transmitting opening, and the light is projected through the light transmitting opening, thereby exciting the wavelength conversion. Structure that changes the color of the light emitted by the illuminating structure. Since the light absorbing layer disposed on the transparent substrate covers the area other than the lens structure and the light-transmissive opening, the stray light emitted by the adjacent light-emitting structure can be effectively absorbed, thereby preventing mutual interference of stray light. Since the wavelength conversion structure is disposed on the optical module, the present invention can arrange a plurality of light emitting structures emitting the same color light (for example, ultraviolet light or blue light) on the same tiny carrier substrate (for example, 1 mm*1 mm), so that The light-emitting device of the present invention is suitable for miniaturization and high color rendering capability.

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.

1‧‧‧Lighting device

10‧‧‧Lighting module

12‧‧‧Optical module

14‧‧‧First wavelength conversion structure

16‧‧‧second wavelength conversion structure

18‧‧‧ Third wavelength conversion structure

20‧‧‧floor

22‧‧‧Support

24‧‧‧Protective layer

100‧‧‧bearing substrate

102‧‧‧Lighting structure

120‧‧‧Transparent substrate

122‧‧‧Lens structure

124‧‧‧Light opening

126‧‧‧ Groove

128‧‧‧Light absorbing layer

130‧‧‧reflective layer

A‧‧‧ optical axis

D1‧‧‧opening area

D2‧‧‧ bottom area

G‧‧‧ gap

L‧‧‧Light

S1‧‧‧ first surface

S2‧‧‧ second surface

S3‧‧‧ third surface

S4‧‧‧ fourth surface

Claims (24)

A light-emitting device includes: a light-emitting module, comprising a carrier substrate and N light-emitting structures, wherein N is a positive integer greater than 2, the carrier substrate includes a first surface and a second surface, the first surface and the first surface Opposite the second surface, the N light emitting structures are disposed on the first surface; an optical module includes a transparent substrate, N lens structures, and N light transmissive openings, the transparent substrate including a third surface and a first surface a fourth surface, the third surface is opposite to the fourth surface, the N lens structures are disposed on the third surface, and the N light transmissive openings are respectively disposed on the fourth surface corresponding to the N lens structures, each The light emitting structure corresponds to one of the N lens structures and one of the N light transmissive openings, and the optical module is disposed opposite to the light emitting module such that the third surface faces the second surface, and the a gap exists between the third surface and the second surface; at least one first wavelength conversion structure is disposed on at least one of the N light-transmissive openings; and at least one second wavelength conversion structure is disposed on the N Light through At least one of the other ones. The illuminating device of claim 1, wherein the illuminating device further comprises at least one third wavelength converting structure disposed on at least one of the N light transmissive openings. The illuminating device of claim 2, wherein the N illuminating structures emit ultraviolet light, and the at least one first wavelength converting structure, the at least one second wavelength converting structure, and the at least one third wavelength converting structure are respectively at least one a red light conversion structure, at least one green light conversion structure, and at least one blue light conversion structure. The illuminating device of claim 2, wherein the N illuminating structures emit blue light, N is a positive integer greater than 3, the at least one first wavelength converting structure, the at least one second wavelength converting structure, and the at least one The three-wavelength conversion structure is respectively at least one red light conversion structure, at least one green light conversion structure, and at least one yellow light conversion structure. The illuminating device of claim 1, wherein the N illuminating structures emit blue light, and the at least one first wavelength converting structure and the at least one second wavelength converting structure are respectively at least one red light converting structure and at least one green light converting The light emitting device further includes at least one scattering structure disposed on at least one of the N light transmissive openings. The illuminating device of claim 1, wherein the N illuminating structures each comprise a illuminating area, and the illuminating areas of the illuminating areas are different. The illuminating device of claim 1, wherein the opening areas of the N light-transmissive openings are different. The illuminating device of claim 1, wherein the numerical apertures of the N lens structures are different. The illuminating device of claim 1, wherein the N illuminating structures each comprise a illuminating region, and each of the illuminating regions is disposed on the first surface in a non-collinear manner. The illuminating device of claim 1, wherein the N lens structures are disposed on the third surface in a non-coplanar manner. The illuminating device of claim 1, wherein the optical module further comprises a light absorbing layer disposed on the transparent substrate and covering an area other than the N lens structures and the N light transmissive openings. The illuminating device of claim 1, wherein the optical module further comprises N grooves formed on the fourth surface, each of the transparent openings being respectively disposed in the N grooves, the at least one A wavelength conversion structure and the at least one second wavelength conversion structure are respectively disposed in at least one of the N grooves. The illuminating device of claim 12, wherein the optical module further comprises a light absorbing layer and a reflective layer disposed on the transparent substrate and covering the N lens structures and the N grooves The reflective layer is disposed on the N grooves and covers a region other than the N light-transmissive openings. The illuminating device of claim 1, wherein an opening area of each of the light-transmitting openings is smaller than a bottom area of the corresponding lens structure. The illuminating device of claim 1, wherein each of the illuminating structures is disposed on the corresponding lens On the optical axis of the structure. The illuminating device of claim 15, wherein the optical axes of the N lens structures are not parallel to each other. The illuminating device of claim 1, further comprising a bottom plate, wherein the light emitting module is disposed on the bottom plate and electrically connected to the bottom plate. The illuminating device of claim 1, further comprising a plurality of supporting members, the supporting members connecting the third surface of the transparent substrate and the second surface of the carrying substrate to support the optical module to the illuminating Above the module, the gap exists between the third surface and the second surface. The illuminating device of claim 17, further comprising a plurality of supporting members, the supporting members connecting the third surface of the transparent substrate and the bottom plate to support the optical module above the light emitting module, such that The gap exists between the third surface and the second surface. The illuminating device of claim 18 or claim 19, wherein the support members are integrally formed with the transparent substrate. The illuminating device of claim 17, further comprising a protective layer disposed on the bottom plate and the light emitting module. The illuminating device of claim 1, wherein the N lens structures are integrally formed with the transparent substrate. The illuminating device of claim 17, wherein each of the illuminating structures comprises a positive electrode and a negative electrode, the bottom plate comprising N pairs of electrode pads disposed thereon, each of the electrode pad pairs comprising a positive electrode pad and a negative electrode The electrode pad, the positive electrode and the negative electrode of each of the light-emitting structures are respectively disposed on the positive electrode pad and the negative electrode pad of the bottom plate, so that the light-emitting structure and the electrode pad pair are electrically connected to emit light. The illuminating device of claim 17, wherein each of the illuminating structures comprises a first electrode and a second electrode electrically opposite to the first electrode and shared with each of the other illuminating structures, the bottom plate comprising N An electrode pad and a second electrode pad electrically opposite to the N first electrode pads, wherein the first electrode of the light emitting structure and the common second electrode respectively correspond to the first electrode pad disposed on the bottom plate And the second electrode pad, the light emitting structure and the first, the first The two electrode pads form an electrical connection to emit light.