TW201639195A - An optical lens and a light module, a panel light and a display comprising thereof - Google Patents

Abstract

This present invention provides an optical lens, comprising a body having a bottom surface and a light outputting surface above the bottom surface, wherein the bottom surface has a cavity for containing a light source, and the inner wall of the cavity is the light inputting surface; the light outputting surface includes a central light outputting region corresponding to the cavity and a peripheral light outputting region extending from the central light outputting region to the edge of the bottom surface; and a quantum dots sealer set forth within the body and sandwiching between the bottom surface and light outputting surface.

Description

Optical lens and light-emitting module, panel lamp and display using the same

The present invention relates to an optical lens, and more particularly to an optical lens that can be used in an LED lighting module.

The direct type liquid crystal display has the advantages of high brightness and high contrast, and has now become a mainstream display. Among them, because the light-emitting diode (LED) has the advantages of low energy consumption and low pollution, it has replaced the cold cathode fluorescent tube as the illumination source of the backlight module of the current liquid crystal display. However, the direct-lit LED backlight module is limited by the LED illumination angle and intensity, and needs to be arranged with a certain mixing distance or a high LED density, and is matched with a diffusion plate to solve the problem of bright and dark bands.

In order to solve the above shortcomings, a secondary optical lens is added on the light emitting surface of the light emitting diode to expand the light emitting angle of the light emitting diode to reduce the bright and dark band problems of the direct type LED backlight module, so that the LEDs are The distance can be expanded, thereby reducing the use of LEDs in the LED backlight module, improving the luminous efficiency of the direct-lit LED backlight module, and greatly reducing the cost.

The current white LEDs are mainly issued by blue LED chips. The blue light excites the phosphor powder covering the encapsulating glue above the blue light wafer, thereby causing the phosphor powder to emit yellow and/or green light and/or red light, and then absorbed by the phosphor powder. The remaining blue light is mixed into white light. However, it is well known that the luminous efficiency of the fluorescent powder is inversely proportional to the temperature, and the heat generated by the blue LED chip when the light is emitted causes the fluorescent powder in the encapsulating material covering the surface thereof to be heated, resulting in a decrease in luminous efficiency and life of the fluorescent powder. Therefore, the current white LED will darken and produce chromatic aberration after a period of use.

Quantum dots are one type with about 10 nm (nm) or less diameter semiconductor nanocrystals and produce a quantum confinement effect. The quantum dots can emit light that is stronger than light emitted by a typical phosphor having a narrow wavelength band. Light emission by quantum dots can be achieved by the conversion of conduction electrons from a conduction band to a valence band. Even in the case of quantum dots of the same material, quantum dots can emit light having different wavelengths depending on their particle size. Therefore, the use of quantum dots instead of phosphor powder as a wavelength conversion material for LEDs can greatly improve the luminous efficiency and color saturation. However, quantum dots have the disadvantage of being easily wetted, and their lifetime is rapidly degraded when exposed to air.

In addition, in order to solve the above-mentioned use of the direct type LED lighting module The invention has the disadvantages of traditional fluorescent powder as a white light LED of a wavelength converting substance, the invention It is proposed that a novel optical lens combining quantum dots and secondary optical lenses can not only improve the luminous efficiency and color saturation of white LEDs, but also expand the light-emitting angle of the LED lighting module.

A feature of the present invention is to provide an optical lens comprising a body having a bottom portion and a light exiting portion above the bottom portion, the bottom portion having a recess portion for receiving a light source and the inside of the recess portion The wall is a light incident surface of the light source, and the light exiting portion includes a central light exiting region corresponding to the recessed portion and a peripheral light exiting region extending outward from the central light exiting region to the bottom portion; and a quantum dot containing portion The sealing body is disposed in the body and located between the bottom portion and the light exiting portion.

Another feature of the present invention is to provide an optical lens as described above, wherein the quantum dot-containing sealing body is disposed between the light incident surface and the central light emitting surface.

Another feature of the present invention is to provide an optical lens as described above, and the quantum dot comprises GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaN, GaNAs, GaPAs, AlNP, AlNAs, AlPAs , InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, and InAlPAs III-V semiconductor nanocrystals, and/or include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe , HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, One of HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, and HgZnSTe II-VI semiconductor semiconductor nanocrystals, and/or SbTe and other V-VI semiconductor semiconductor nanocrystals Or a combination of quantum dots, and the sealing body may be selected from materials that have a good insulating effect on air, such as glass.

Another feature of the present invention is to provide an optical lens as described above, and the light incident surface is a spherical surface, a curved surface or a tapered surface.

Another feature of the present invention is to provide an optical lens as described above, and the central light exiting region is a spherical surface, a curved surface or a tapered surface.

Another feature of the present invention is to provide an optical lens as described above, and the bottom portion adjacent to the recess portion further includes a plurality of fixing portions.

Another feature of the present invention is to provide a light emitting module including a substrate, a light source disposed on the substrate, and an optical lens as described above, wherein the bottom of the body is fixed on the substrate, and the light source is The light source is received in the recess of the optical lens, and an air layer is isolated between the light source and the light incident surface of the optical lens.

Another feature of the present invention is to provide a light emitting module, and the light source is a light emitting diode chip or a light emitting diode package.

Another feature of the present invention is to provide a flat panel lamp comprising a substrate having opposite upper and lower surfaces, wherein the upper surface is provided with a plurality of light emitting modules as described above, and the light emitting modules are arranged in an array And a diffusing plate disposed above the upper surface of the substrate, such that light emitted by the light emitting modules expands the diffusing plate to form uniform planar light.

Another feature of the present invention is to provide a display including a substrate having opposite upper and lower surfaces, wherein the upper surface of the substrate is provided with a plurality of light-emitting modules as described above, and the light-emitting modules are arranged in an array; and a display panel is disposed on the substrate Above the upper surface, the light emitted by the light-emitting modules is displayed through the display panel.

100, 200, 300‧‧‧ optical lenses

110, 210, 310‧‧‧ ontology

110A, 210A, 310A‧‧‧ bottom

110B, 210B, 310B‧‧‧ central light transmission area

110C, 210C, 310C‧‧‧ peripheral light-emitting area

120, 220, 320‧‧‧ recessed

130, 230, 330‧‧‧ fixed parts

135, 235, 335‧‧‧ sealed parts with sub-points

140, 240, 340‧‧‧Lighting diodes

150, 250, 350‧‧‧ lighting modules

1A to 1B are cross-sectional views of an optical lens according to a first embodiment of the present invention, and a light-emitting module incorporating the optical lens.

2A to 2B are cross-sectional views of an optical lens according to a second embodiment of the present invention and a light emitting module incorporating the optical lens.

3A to 3B are cross-sectional views showing an optical lens according to a third embodiment of the present invention and a light emitting module incorporating the optical lens.

The manner of making and using the embodiments of the present invention will be described in detail below. It is to be noted that the present invention provides many inventive concepts that can be applied in various specific forms. The specific embodiments discussed herein are merely illustrative of specific ways of making and using the invention, and are not intended to limit the present invention. The scope of the Ming.

Embodiment 1:

Hereinafter, an optical lens according to Embodiment 1 of the present invention and a light-emitting module using the same will be described with reference to FIGS. 1A to 1B.

Referring to FIG. 1A, an optical lens 100 is provided, which includes a body 110 having a bottom portion 110A and a light emitting portion 110B, 110C above the bottom portion. The bottom portion 110A has a recess portion 120 for receiving a light source, and the inner surface of the tapered surface of the recessed portion 120 is a light incident surface of the light source, and the light exiting portion includes a tapered central light exiting region 110B corresponding to the recessed portion and an outward extending from the central light exiting region to A peripheral light exiting region 110C at the intersection with the bottom portion, and a sealing body 135 containing quantum dots having a thickness of about 0.05 mm to 3 mm are disposed in the body and between the bottom portion and the light exiting portion. In addition, the bottom portion 110A adjacent to the periphery of the recess portion 120 further includes a plurality of fixing portions 130.

The above-mentioned quantum dot-containing sealing body 135 may be in the form of a flat plate, wherein the quantum dots may be selected from the group consisting of GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs. Al-A, Sn, C, C, C, C , ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, Group II-VI semiconductor semiconductor nanocrystals of HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe, and/or Or a quantum dot of one or a combination of V-VI semiconductor semiconductor nanocrystals such as SbTe, and the sealing body may be selected from a material having good insulating effect on air, such as glass.

Next, please refer to FIG. 1B to provide a surface provided with illumination The substrate 145 of the diode 140 is fixedly disposed on the substrate 145 by the fixing portion 130 in a manner away from the optical lens 100, and the light emitting diode 140 is received in the recess portion 120 of the optical lens 100. An optical module 150 having a large exit angle and high color saturation. The first light having the first wavelength emitted by the light emitting diode 140 enters the body 110 of the optical lens 100 via the inner surface of the tapered surface of the recess 120, and the quantum dot is made through the sealing body 135 containing the quantum dot. The second light having the second wavelength is excited to be emitted, and then mixed with the first light having the first wavelength to form white light. In addition, the light exit angle of the first light having the first wavelength and the second light having the second wavelength is enlarged by the central light exiting region 110B and the peripheral light exiting region 110C of the tapered surface of the optical lens 100. The light emitting diode of the embodiment includes a light emitting diode chip or a light emitting diode package.

The light emitting module 150 as shown in FIG. 1B can be disposed on a base The boards are formed in an array, and then a diffusion plate (not shown) is selectively disposed on the array of light-emitting modules 150 to form a flat panel light.

The light emitting module 150 as shown in FIG. 1B can also be disposed on one An array is formed on the substrate, and then a display panel (not shown) is disposed on the array of light-emitting modules 150, so that the light emitted by the light-emitting modules 150 is displayed through the display panel.

Embodiment 2:

Hereinafter, an optical lens according to a second embodiment of the present invention and a light-emitting module using the optical lens will be described with reference to FIGS. 2A to 2B.

Referring to FIG. 2A, an optical lens 200 is provided, which includes a body 210 having a bottom portion 210A and a light emitting portion 210B, 210C above the bottom portion. The bottom portion 210A has a recess portion 220 for receiving a light source, and the spherical or curved inner wall of the recessed portion 220 is a light incident surface of the light source, and the light exiting portion includes a tapered central light exiting region 210B corresponding to the recessed portion and a light exiting from the central light exiting region The peripheral light exiting region 210C extending to the bottom portion and a sealing body 235 containing quantum dots having a thickness of about 0.05 mm to 3 mm are disposed in the body and between the bottom portion and the light exiting portion. In addition, the bottom portion 210A adjacent to the periphery of the recess portion 120 further includes a plurality of fixing portions 130.

The above-mentioned quantum dot-containing sealing body 235 may be in the form of a flat plate, wherein the quantum dots may be selected from the group consisting of GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs. , AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, Group III-V semiconductor nanocrystals of GaInPAs, InAlNP, InAlNAs, and InAlPAs, and/or include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, II-VI semiconductor semiconductors of ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe A quantum dot of one or a combination of a nanocrystal, and/or a V-VI semiconductor semiconductor nanocrystal such as SbTe, and the sealing body may be selected from a material having a good insulating effect on air, such as glass.

Next, please refer to Figure 2B, providing a surface with illumination The substrate 245 of the diode 240 is fixedly disposed on the substrate 245 by the fixing portion 230 so as to be away from the optical lens 200, and the light emitting diode 240 is received in the recess 220 of the optical lens 200 to form An optical module 250 having a large exit angle and high color saturation. The first light having the first wavelength emitted by the light-emitting diode 240 enters the body 210 of the optical lens 200 via the inner surface of the tapered surface of the recess 220, and the quantum dot is formed by the sealing body 235 containing the quantum dots. The second light having the second wavelength is excited to be emitted, and then mixed with the first light having the first wavelength to form white light. In addition, the light exit angle of the first light having the first wavelength and the second light having the second wavelength is enlarged by the central light exiting region 210B and the peripheral light exiting region 210C of the tapered surface of the optical lens 200. The light emitting diode of the embodiment includes a light emitting diode chip or a light emitting diode package.

The light emitting module 250 as shown in FIG. 2B can be disposed on a base The boards are formed in an array, and then a diffusion plate (not shown) is selectively disposed on the array of light-emitting modules 250 to form a flat panel light.

The light-emitting module 250 shown in FIG. 2B can also be disposed on one An array is formed on the substrate, and then a display panel (not shown) is disposed on the array of light-emitting modules 250, so that the light emitted by the light-emitting modules 250 is displayed through the display panel.

Embodiment 3:

Hereinafter, an optical lens according to a third embodiment of the present invention and a light-emitting module using the optical lens will be described with reference to FIGS. 3A to 3B.

Referring to FIG. 3A, an optical lens 300 is provided, which includes a body 310 having a bottom portion 310A and a light exiting portion 310B, 310C above the bottom portion. The bottom portion 310A has a recess portion 320 for receiving a light source, and the spherical or curved inner wall of the recessed portion 320 is a light incident surface of the light source, and the light exiting portion includes a spherical or curved central light exiting region 310B corresponding to the depressed portion and a central light exiting region The peripheral light exiting region 310C extending outwardly to the bottom portion and a sealing body 335 containing quantum dots having a thickness of about 0.05 mm to 3 mm are disposed in the body and between the bottom portion and the light exiting portion. In addition, the bottom portion 310A adjacent to the periphery of the recess portion 320 further includes a plurality of fixing portions 330. In the recessed portion 320 of the embodiment, the light incident surface thereof may be a tapered surface as in the first embodiment.

The above-mentioned quantum dot-containing sealing body 335 can be a flat plate The quantum dots may be selected from the group consisting of GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaN, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs. , Group III-V semiconductor nanocrystals of GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, and InAlPAs, and/or include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe , ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe II a quantum dot of one or a combination of a group VI semiconductor semiconductor nanocrystal, and/or a V-VI semiconductor semiconductor nanocrystal such as SbTe, and the sealing body may be selected from materials having good insulation effect on air. For example, glass.

Next, please refer to Figure 3B, providing a surface with illumination The substrate 345 of the diode 340 is fixedly disposed on the substrate 345 by the fixing portion 330 in a manner away from the optical lens 300, and the LED 340 is received in the recess 320 of the optical lens 300. An optical module 350 having a large exit angle and high color saturation. The first light having the first wavelength emitted by the LED 340 enters the body 310 of the optical lens 300 via the spherical or curved inner wall of the recess 320, and passes through the sealing body 335 containing the quantum dots. The quantum dot is excited to emit a second light having a second wavelength, and then mixed with the first light having the first wavelength to form white Light. In addition, the light exiting angle of the first light having the first wavelength and the second light having the second wavelength is enlarged by the spherical or curved central light exiting region 310B and the peripheral light exiting region 310C of the optical lens 300. The light emitting diode of the embodiment includes a light emitting diode chip or a light emitting diode package.

The light-emitting module 350 as shown in FIG. 3B may be disposed on a substrate to form an array, and then selectively disposed a diffusion plate (not shown) on the array-shaped light-emitting module 350 to form a panel light. .

The light-emitting module 350 as shown in FIG. 3B may be disposed on a substrate to form an array, and then a display panel (not shown) is disposed on the array-shaped light-emitting module 350 to enable the light-emitting modes. The light emitted by the group 350 is displayed as an image through the display panel.

While the invention has been described above in terms of the preferred embodiments thereof, which are not intended to limit the invention, the invention may be modified and combined with the various embodiments described above without departing from the spirit and scope of the invention. example.

100‧‧‧ optical lens

110‧‧‧ body

110A‧‧‧ bottom

110B‧‧‧Central light transmission area

110C‧‧‧Outside light transmission area

120‧‧‧Depression

130‧‧‧Fixed Department

135‧‧‧ Sealed parts with sub-points

140‧‧‧Lighting diode

150‧‧‧Lighting module

Claims (10)

An optical lens includes: a body having a bottom portion and a light exiting portion above the bottom portion, the bottom portion having a recessed portion for accommodating a light source, and an inner wall of the recessed portion is an entrance of the light source a light surface, wherein the light exiting portion includes a central light exiting region corresponding to the recessed portion and a peripheral light exiting region extending outward from the central light exiting region to the bottom portion; and a sealing body containing quantum dots disposed on the light emitting portion The body is located between the bottom and the light exiting portion. The optical lens of claim 1, wherein the quantum dot-containing sealing body is disposed between the light incident surface and the central light emitting surface. The optical lens of claim 2, wherein the quantum dot comprises one or a combination of a III-V semiconductor semiconductor nanocrystal, a II-VI semiconductor semiconductor nanocrystal, or a V-VI semiconductor semiconductor nanocrystal. . The optical lens of claim 3, wherein the light incident surface is a spherical surface, a curved surface or a tapered surface. The optical lens of claim 4, wherein the central light exiting region is a spherical surface, a curved surface or a tapered surface. The optical lens of claim 5, wherein the bottom surface adjacent to the recess portion further comprises a plurality of fixing portions. A light emitting module comprising: a substrate; A light source, disposed on the substrate, and an optical lens according to any one of claims 1 to 6, wherein the bottom of the body is fixed to the substrate, and the light source is received in the optical lens In the recess, an air layer is isolated between the light source and the light incident surface of the optical lens. The lighting module of claim 7, wherein the light source is a light emitting diode chip or a light emitting diode package. A flat panel lamp includes a substrate having an upper surface and a lower surface, wherein the upper surface is provided with a plurality of light emitting modules according to claim 8, and the light emitting modules are arranged in an array; and a diffusion plate is disposed. The light is emitted from the upper surface of the substrate, so that the light emitted by the light-emitting modules expands the diffusing plate to form uniform planar light. A display comprising a substrate having opposite upper and lower surfaces, wherein the upper surface of the substrate is provided with a plurality of light-emitting modules according to claim 8, and the light-emitting modules are arranged in an array; The display panel is disposed above the upper surface of the substrate, so that the light emitted by the light emitting modules is displayed through the display panel.