CN209325466U - A kind of bulb lamp - Google Patents

Abstract

The utility model relates to a kind of panel lights, go out radiant and diffuser plate including substrate, wide-angle, it is provided with several wide-angles on substrate and goes out radiant, is equipped with the diffuser plate being correspondingly arranged with substrate in the top that wide-angle goes out radiant, and define an air layer between substrate and diffuser plate jointly；It includes LED chip that the wide-angle, which goes out radiant, the LED chip is inverted structure, and the reflecting layer under the setting of the bottom surface of LED chip, the top surface of LED chip and side are provided with blue light and answer excitation layer, upper reflecting layer is arranged in the top surface that blue light answers excitation layer, four sides that the blue light answers excitation layer are full output optical zone, and upper reflecting layer top surface is entirely or partially echo area.Utility model has the advantages that this practical bulb lamp is capable of increasing light source light-emitting angle, and light mixing effect is improved, brightness disproportionation is avoided and integral thickness can be reduced.

Description

A kind of bulb lamp

Technical field

The utility model relates to a kind of lamps and lanterns, in particular to a kind of bulb lamp.

Background technique

LED is a kind of light emitting semiconductor device that can convert electrical energy into light, it be different from incandescent lamp tungsten wire shine with The tricolor powder principle of luminosity of energy-saving fluorescent lamp, and being shone by Carrier recombination in semiconductor material, have long service life, The advantages of illumination effect is good, radiationless, low energy consumption, with the raising of people's environmental protection and energy saving idea, LED is widely applied to illumination In lamps and lanterns, in bulb lamp.The forward LED of conventional belt mirror structure, as shown in Figure 1, including setting gradually from bottom to top Reflecting layer 11, substrate 12, N-GaN layer 13 and P-GaN layer 14；The flip LED of conventional belt mirror structure, as shown in Fig. 2, packet Include the reflecting layer 21 set gradually from bottom to top, P-GaN layer 22, luminescent layer 23, N-GaN layer 24 and substrate 25；Traditional formal dress with If flip LED chips using reflecting layer, are that 5 faces go out light, and reflecting layer is arranged at close to substrate side, i.e. LED core On the bottom surface of piece.

Currently, light-emitting angle only has 120 ° of left sides in the light-source structure formed after the LED chip encapsulation with mirror structure The right side is subject to certain restrictions in the application of illuminating industry area source.

Such as: traditional straight-down negative face, which goes out optical mode group mainly, 3 kinds of modes:

(1) using the array of source of conventional LED chips composition, diffusion is set in the top certain distance of LED light source array Point light source is become area source using diffuser plate by plate；

(2) using the array of source of conventional LED chips composition, it is close to mounted lens in each LED chip, makes LED lamp bead For the light of sending after lens, light carries out light intensity superposition to a certain extent by the air layer conduction between lens and diffuser plate It is irradiated on diffuser plate again afterwards, and then point light source is become into area source；

(3) conventional LED chips array of source is used, silica gel is directly coated on the surface of LED light source array and adds fluorescent powder shape At light-conductive media layer, so that point light source changes to area source.

Aforesaid way has some disadvantages or limitation:

(1) for first way: as shown in Figure 3,4, the light-emitting angle of conventional LED light source is up to 120 ° or so, Biggish distance must be spaced between LED light source 91 and diffuser plate 92 can be only achieved more uniform light mixing effect, and entire surface goes out Optical mode group is usually very thick, and is greatly limited in the application of lighting area panel light.

(2) for the second way: being superimposed the light-emitting angle energy after lens 3 as shown in Figure 5,6, on conventional LED light source 91 Enough reach 135 °, although increasing light emitting angle, and top surface goes out light and is greatly reduced, can reach in relatively much shorter distance More uniform light mixing effect, but due to needing also must between diffuser plate 92 and secondary optical lens 93 using secondary optical lens It must be spaced a distance, be reduced although comparing first way thickness, face goes out optical mode group and is unable to reach ultra-thin effect Fruit.

(3) for the third mode, as shown in figure 8, it is coated on the array of source surface that several LED chips 91 are constituted Phosphor powder layer 94 has been slightly increased the lateral propagation and light mixing of white light；But by optical theory, we are it can be found that when blue light exists When being transmitted in the waveguide containing fluorescent powder, as exciting light blue light strength can because fluorescent powder absorption and irregular scattering and Quickly reduce.As shown in figure 9, when light intensity is transmitted in the waveguide containing fluorescent powder, intensity is numerically by taking point light source as an example With cube being inversely proportional for distance；As shown in Figure 10, linear light source, when light intensity is transmitted in the waveguide containing fluorescent powder, intensity exists Numerically square it is inversely proportional with distance；As shown in figure 11, area source, when light intensity is transmitted in the waveguide containing fluorescent powder, Intensity is numerically inversely proportional with distance.

Using the area source of first and second kind of mode, due to the limitation of LED chip light extraction angle, not only easily forms dark space, mixes Optical uniformity is poor, and entire straight-down negative face goes out that optical mode group is also thicker, and the thickness of optical mode group is gone out to reduce entire surface, can only pass through contracting Small adjacent LED chip chamber away from realizing (referring to Fig. 7), but required LED chip quantity at square increase, cost substantially mentions It is high.

Using the area source of the third mode, although solving the problems, such as mould group thickness, still have the following problems with not Foot:

On the one hand, the light-emitting angle limitation of LED chip, so that the light that LED chip issues is unfavorable in phosphor powder layer It laterally propagates, lateral communication effect is limited；

On the other hand, since the white light that blue light excitated fluorescent powder is mixed to get is decayed sternly in light-conductive media communication process Weight, the blue light decaying of excitated fluorescent powder, therefore, blue light strength reduces, and the lateral transmission intensity along wave guide direction reduces；Chip goes out Brightness is uneven, and light mixing effect is poor, leads to the also uneven of whole face brightness in area source.Therefore, arrangements of chips is than comparatively dense, Entirety limits the LED chip arrangement mode of bigger spacing.

In summary, it would be desirable to research and develop one kind and be capable of increasing light source light-emitting angle, and improve light mixing effect, avoid it is bright Degree is uneven and can reduce the bulb lamp of integral thickness.

Summary of the invention

The technical problem to be solved by the present invention is to provide one kind to be capable of increasing light source light-emitting angle, and improves light mixing Effect avoids brightness disproportionation and can reduce the bulb lamp of integral thickness.

In order to solve the above technical problems, the technical solution of the utility model are as follows: a kind of bulb lamp, innovative point are: packet Lamp cap, bulb housing and area source mould group are included, the bottom of the bulb housing is arranged at the top of the lamp cap, and the area source mould group is set It sets in the bulb housing, and area source mould group is electrically connected with the lamp cap；

The area source mould group includes that substrate, wide-angle go out radiant, high refractive index transparent ducting layer and Diffusion barrier layer, institute It states and is provided with several wide-angles on substrate and goes out radiant, the high refractive index that covering wide-angle goes out radiant is additionally provided on substrate Transparent waveguide layer, and the height of high refractive index transparent ducting layer is equal to or higher than the height that wide-angle goes out radiant, the high folding It penetrates rate transparent waveguide layer upper surface and is additionally provided with Diffusion barrier layer；The refractive index of the high refractive index transparent ducting layer is greater than diffusion barrier The refractive index of layer lower surface.

Further, the area source mould group in the form of sheets, twisted shape, orthogonal cyclic annular or helical heater item.

Further, the substrate is multiple spaced discontinuous strip substrates, and the wide-angle goes out light light Source is correspondingly arranged on strip substrate.

Further, it includes LED chip that the wide-angle, which goes out radiant, and the LED chip is inverted structure, LED chip Including the P-GaN layer, luminescent layer, N-GaN layers and substrate set gradually from bottom to top, and it is anti-under the setting of the bottom surface of LED chip Layer to be penetrated, the top surface of LED chip and side are provided with blue light and answer excitation layer, upper reflecting layer is arranged in the top surface that blue light answers excitation layer, Four sides that the blue light answers excitation layer are full output optical zone, and upper reflecting layer top surface is entirely or partially echo area.

Further, reflecting layer in the top surface setting of the LED chip, and the middle reflecting layer is that part light out part point is anti- Penetrate structure.

Further, the granular filler for reflecting, reflecting is contained in the upper reflecting layer.

Further, the blue light answers the top surface of excitation layer and side is provided with one layer of first medium hyaline layer, it is described on Reflecting layer is located at the upper surface of first medium hyaline layer.

Further, second medium hyaline layer, and first are additionally provided between the first medium hyaline layer and reflecting layer Medium hyaline layer refractive index is higher than in second medium hyaline layer refractive index.

Further, between the substrate and high refractive index transparent ducting layer or high refractive index transparent ducting layer and diffusion Local scattering micro-structural is added between film layer.

Utility model has the advantages that

(1) the utility model bulb lamp, for utilizing Diffusion barrier layer lower surface in the area source modular structure of bulb lamp There are gaps for micro-structure, that is, account in Diffusion barrier layer area the air layer of most of area as low-index layer, and then wide-angle The white light that radiant issues out forms waveguide in the high refractive index transparent ducting layer, so that point light source changes to area source, increases The lateral of white light has been added to propagate；Meanwhile the wide-angle in area source mould group goes out radiant, and reflecting layer is set up directly on down Fill LED chip top and bottom, when LED chip issue light when constantly being reflected by upper reflecting layer and lower reflecting layer, due to Blue light answers the presence of excitation layer, for conventional blue laser LED chip, can will reflect back into the blue light come, send out using blue light compounding Layer (i.e. phosphor powder layer) further excites, is further mixed to get white light；It is green in the fluorescence emission spectra of blue-ray LED excitation Absorptivity of the light of the long-wave bands such as light, yellow light, feux rouges in LED chip is lower, and the blue light wavelength that LED chip itself issues compared with Short, absorptivity highest, absorption is most serious；And in the utility model, creatively above LED chip while in setting Reflecting layer and blue light answer excitation layer, answer excitation layer by blue light using the blue light reflected by upper reflecting layer and excite again, further It is mixed to get white light, and white light just lacks mostly relative to the absorbed part of blue light；It is kept away on the basis of realizing that wide-angle goes out light Exempt from the decaying of light；Thus, by using bulb lamp made of the area source mould group, it can be improved light mixing effect, avoid brightness not And integral thickness can be reduced；

(2) the utility model, wherein in area source mould group, between substrate and high refractive index transparent ducting layer, Huo Zhegao Local scattering micro-structural region is added between refractive index transparent ducting layer and Diffusion barrier layer, avoids LED of the tradition without diffusion barrier Lamps and lanterns or conventional diffusion film surface particle occur cluster and show uneven diffusion effect, avoid obvious dark space, can get light mixing Uniform diffusion effect；

(3) the utility model, wherein the setting of medium hyaline layer increases the light-emitting angle of LED chip, be conducive to by Light directing high refractive index transparent ducting layer, increases its light-emitting angle, further improves light mixing effect.

Detailed description of the invention

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

Fig. 1 is the structural schematic diagram of the forward LED of conventional belt mirror structure.

Fig. 2 is the structural schematic diagram of traditional flip LED with mirror structure.

Fig. 3 is the light-emitting angle test chart of Conventional LED light sources.

Fig. 4 is the light intensity principle of stacking figure that traditional straight-down negative face goes out first way in optical mode group.

Fig. 5 is Conventional LED light sources plus the light-emitting angle test chart after lens.

Fig. 6 is the light intensity principle of stacking figure that traditional straight-down negative face goes out in optical mode group to add using LED light source lens mode.

Fig. 7 is another light intensity that traditional straight-down negative face goes out in optical mode group to add using close-packed arrays LED light source lens mode Principle of stacking figure.

Fig. 8 is the schematic diagram that traditional straight-down negative face goes out in optical mode group to add using LED light source array fluorescent powder mode.

Fig. 9 is containing fluorescent powder waveguide for the loss schematic diagram of the luminous intensity of point light source.

Figure 10 is containing fluorescent powder waveguide for the loss schematic diagram of the luminous intensity of linear light source.

Figure 11 is containing fluorescent powder waveguide for the loss schematic diagram of the luminous intensity of area source.

Figure 12 is the structural schematic diagram of the utility model bulb lamp.

Figure 13 is the structural schematic diagram of first embodiment area source mould group in Figure 12.

Figure 14 is the structural schematic diagram that the utility model first embodiment wide-angle goes out radiant.

Figure 15 is that the wide-angle of the utility model first embodiment goes out the light-emitting angle test chart of radiant.

Figure 16 is another structural schematic diagram of first embodiment area source mould group in Figure 12.

Figure 17 is the structural schematic diagram of second embodiment area source mould group in Figure 12.

Figure 18 is the structural schematic diagram that the utility model second embodiment wide-angle goes out radiant.

Figure 19 is another structural schematic diagram of LED chip in the utility model.

Specific embodiment

The following examples can make professional and technical personnel that the utility model be more fully understood, but therefore will not The utility model is limited among the embodiment described range.

Embodiment 1

The present embodiment bulb lamp, as shown in figure 12, including lamp cap 3, bulb housing 2 and the face light of filament structure in the shape of a spiral Source mould group 1, the bottom setting of bulb housing 2 is at 3 top of lamp cap, and area source mould group 1 is arranged in bulb housing 2, and area source mould group 1 It is electrically connected with lamp cap 3.

In the present embodiment, the specific structure of area source mould group 1, as shown in figure 13, including substrate 11, wide-angle go out radiant 12, high refractive index transparent ducting layer 13 and Diffusion barrier layer 14 are provided with several wide-angles on substrate 11 and go out radiant 12, in substrate The high refractive index transparent ducting layer 13 that covering wide-angle goes out radiant 12, and high refractive index transparent ducting layer 13 are additionally provided on 11 Height be equal to or higher than wide-angle and go out the height of radiant 12,13 upper surface of high refractive index transparent ducting layer is additionally provided with diffusion Film layer 14；The refractive index of high refractive index transparent ducting layer 13 is greater than the refractive index of 14 lower surface of Diffusion barrier layer.

Wide-angle of the present embodiment for area source mould group 1 goes out radiant 12, as shown in figure 14, including LED chip 121, LED chip 121 uses the inverted structure with reflecting mirror: LED chip 121 includes the P-GaN layer set gradually from bottom to top, hair Photosphere, N-GaN layers and substrate, and the reflecting layer under the setting of the bottom surface of LED chip 121, in the top surface and side of LED chip 121 It is provided with blue light and answers excitation layer 122, upper reflecting layer 123 is arranged in the top surface that blue light answers excitation layer 122, and blue light answers excitation layer 122 Four sides are full output optical zone, and upper 123 top surface of reflecting layer is entirely or partially echo area.

When it is implemented, the granular filler for reflecting, reflecting is contained in upper reflecting layer 123.

By taking the wide-angle using the top surface catoptric arrangement of translucent half reflection goes out radiant as an example, as shown in figure 15, the knot The main energy angular of the direction of main light emission of the LED light source of normal lambert's light type structure is successfully transformed into four for 0 ° from surface by structure Positive and negative 30 ° of week.Secondly, visible from light distribution is also successfully in homogenization in entire light emitting angle by its luminous intensity Distribution, even if it goes out light light intensity is still light intensity peak 64% or so under positive and negative 85 ° of polarizers of big angle scope.And in normal lambert's light If its light-emitting angle is 120 ° in the LED light source of type structure, that is to say, that when it is at positive and negative 60 °, it goes out light light intensity and is only The half of peak value (referring to Fig. 3).And radiant knot is gone out using the top surface catoptric arrangement wide-angle of translucent half reflection in this patent Even if light intensity its light intensity in positive and negative 85 ° of polarizers of big angle scope is still the 64% of light intensity peak in structure.

As the more specific embodiment of the present embodiment:

In the present embodiment, area source mould group 1 does not limit to filament structure in the shape of a spiral, can also in the form of sheets, twisted shape or just Cross ring shape.

Between substrate 11 and high refractive index transparent ducting layer 13 or high refractive index transparent ducting layer 13 and Diffusion barrier layer 14 Between add local scattering micro-structural.

Ball shape structure can be used in the diffusion particle of local scattering micro-structural, and function is similar with lenticule.Micro-structure includes Holography, cylindrical lens, microlens array and stretchable diffraction grating.Can by using compression roller stamped method, diffusion photoetching process, Hot padding, self-assembly method and respectively to same

Property etching method, realize local scattering micro-structural in diffusion film surface.Light is gathered when through these particles Coke is scattered to again in certain exiting angle range, has the function of enhancing outgoing brightness.In addition, diffusion particle diameter, with The refractive index difference of film-forming resin also ensures that light will not go out in direct projection from diffusion barrier, provide uniform light mixing effect and Uniform brightness.Diffusion barrier according to the present invention with scattering micro-structural utilizes surface period or micro- knot of random distribution Structure modulates the optical states of incident light to the catadioptric effect of light.Using this kind of optical diffusion film with local scattering micro-structural Obtained area source modular structure has many advantages, such as that visual angle is wide, transmitance is high, even light mixing.

Area source mould group made from radiant and traditional approach down straight aphototropism mode set are gone out using 1 wide-angle of the present embodiment Parameters comparison is as follows:

6 inches of mobile phone backlight application cases

Light emitting region

Main energy position

Light emitting angle

Mould group thickness

Gap

Light source granule number ()

Embodiment 1(has fluorescence coating without hyaline layer)

132.48mm*74.52mm

+ 60 ° and -60 °

170°

1mm

6mm

241

COB(Fig. 6)

132.48mm*74.52mm

0 ° (surface)

~120°

1mm

2mm

2416

Conclusion: as can be seen from the above table, under the premise of in light emitting region, area is identical, backlight module thickness is identical, this reality It applies in example, main light emission energy position is offset to side from surface due to going out radiant using wide-angle four sides, meanwhile, hair Angular is up to 170 ° or more, under the premise of guaranteeing identical light mixing effect, effectively raises the spacing of adjacent light source, substantially Reduce light source granule number.

In the present embodiment, substrate 11 is transparent flexible substrate, and specifically optional PI plate, PET sheet, PEV plate or substrate 11 are Aluminium sheet, sheet copper, ceramic wafer specifically can be selected in metal rigidity plate.Substrate 11 uses flexible and transparent or translucent substrate, substrate 11 On circuit use transparency conducting layer, such as ITO, graphene, flexible bendable, so that area source mould group can be further Drop to 1mm or so by optimization, it is as thin as paper.

As shown in figure 16, substrate 11 is multiple spaced discontinuous strip substrates, and wide-angle goes out radiant pair It should be arranged on strip substrate.

Embodiment 2

The present embodiment bulb lamp is substantially the same manner as Example 1, as shown in figure 12, including lamp cap 3, bulb housing 2 and in spiral shell The area source mould group 1 of shape filament structure is revolved, at 3 top of lamp cap, area source mould group 1 is arranged in lamp for the bottom setting of bulb housing 2 In blister 2, and area source mould group 1 is electrically connected with lamp cap 3.

In the present embodiment, the specific structure of area source mould group 1, as shown in figure 17, including substrate 11, wide-angle go out radiant 12, high refractive index transparent ducting layer 13 and Diffusion barrier layer 14 are provided with several wide-angles on substrate 11 and go out radiant 12, in substrate The high refractive index transparent ducting layer 13 that covering wide-angle goes out radiant 12, and high refractive index transparent ducting layer 13 are additionally provided on 11 Height be equal to or higher than wide-angle and go out the height of radiant 12,13 upper surface of high refractive index transparent ducting layer is additionally provided with diffusion Film layer 14；The refractive index of high refractive index transparent ducting layer 13 is greater than the refractive index of 14 lower surface of Diffusion barrier layer.

The difference is that: wide-angle of the present embodiment for area source mould group 1 goes out radiant 12, as shown in figure 18, packet Include LED chip 121, LED chip 121 is inverted structure, LED chip 121 include the P-GaN layer set gradually from bottom to top, Luminescent layer, N-GaN layers and substrate, and the reflecting layer under the setting of the bottom surface of LED chip 121, in the top surface and side of LED chip 121 Face is provided with blue light and answers excitation layer 122, and upper reflecting layer 123 is arranged in the top surface that blue light answers excitation layer 122, and answers excitation layer in blue light 122 top surface and side are provided with one layer of medium hyaline layer 124, and upper reflecting layer is arranged in the upper surface of medium hyaline layer 124 123；Four sides that blue light answers excitation layer 122 are full output optical zone, and upper 123 top surface of reflecting layer is entirely or partially echo area.

The wide-angle of embodiment 1 and embodiment 2 goes out the LED chip used in radiant, and more specific embodiment is such as schemed Shown in 19, the top surface of LED chip 121 is equipped with middle reflecting layer 125, and middle reflecting layer 125 is that part light out part divides catoptric arrangement.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.This The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments That states only illustrates the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model It will also have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.This is practical new Type is claimed range and is defined by the appending claims and its equivalent thereof.

Claims (9)

1. a kind of bulb lamp, it is characterised in that: including lamp cap, bulb housing and area source mould group, the bottom of the bulb housing is arranged At the top of the lamp cap, the area source mould group is arranged in the bulb housing, and area source mould group is electrically connected with the lamp cap；

The area source mould group includes that substrate, wide-angle go out radiant, high refractive index transparent ducting layer and Diffusion barrier layer, the base It is provided with several wide-angles on plate and goes out radiant, the high refractive index transparent that covering wide-angle goes out radiant is additionally provided on substrate Ducting layer, and the height of high refractive index transparent ducting layer is equal to or higher than the height that wide-angle goes out radiant, the high refractive index Transparent waveguide layer upper surface is additionally provided with Diffusion barrier layer；The refractive index of the high refractive index transparent ducting layer is greater than under Diffusion barrier layer The refractive index on surface.

2. bulb lamp according to claim 1, it is characterised in that: the area source mould group in the form of sheets, twisted shape, orthogonal loop Shape or helical heater item.

3. bulb lamp according to claim 1, it is characterised in that: the substrate is multiple spaced discontinuous items Shape substrate, and the wide-angle goes out radiant and is correspondingly arranged on strip substrate.

4. bulb lamp according to claim 1, it is characterised in that: it includes LED chip that the wide-angle, which goes out radiant, described LED chip is inverted structure, and LED chip includes the P-GaN layer, luminescent layer, N-GaN layers and substrate set gradually from bottom to top, And the reflecting layer under the setting of the bottom surface of LED chip, the top surface of LED chip and side are provided with blue light and answer excitation layer, blue light is multiple Upper reflecting layer is arranged in the top surface of excitation layer, and four sides that the blue light answers excitation layer are full output optical zone, and upper reflecting layer top surface is Entirely or partially echo area.

5. bulb lamp according to claim 4, it is characterised in that: reflecting layer in the top surface setting of the LED chip, and institute Stating middle reflecting layer is that part light out part divides catoptric arrangement.

6. bulb lamp according to claim 4, it is characterised in that: contain for reflecting, reflecting in the upper reflecting layer Granulated filler object.

7. according to bulb lamp described in claim 4,5 or 6, it is characterised in that: the blue light answers the top surface and side of excitation layer It is provided with one layer of first medium hyaline layer, the upper reflecting layer is located at the upper surface of first medium hyaline layer.

8. bulb lamp according to claim 7, it is characterised in that: also set between the first medium hyaline layer and reflecting layer It is equipped with second medium hyaline layer, and first medium hyaline layer refractive index is higher than in second medium hyaline layer refractive index.

9. bulb lamp according to claim 1, it is characterised in that: between the substrate and high refractive index transparent ducting layer or Local scattering micro-structural is added between person's high refractive index transparent ducting layer and Diffusion barrier layer.