CN205692859U - A kind of for illuminating or the laser white light emitting device of display - Google Patents

Abstract

The utility model discloses a kind of for illuminating or the laser white light emitting device of display.Described excited white light light-emitting device includes heat sink substrate, semiconductor laser chip and transparent fluorescent ceramic；Described semiconductor laser chip lasing blue light；Described semiconductor laser chip is fixed in described heat sink substrate；Described semiconductor laser chip is packaged by described transparent fluorescent ceramic.Transparent fluorescent ceramic is combined by this utility model with the chip of excitation source, it is to avoid fluorescent material and silica gel cause decline or the light source fails of luminous efficiency because of device heating；If according to application needs, the heat resistance of transparent fluorescent ceramic makes device be operated in high electric current high temperature environment, it is to avoid device output power and the decline of electro-optical efficiency when high temperature or high injection current work.

Description

A kind of for illuminating or the laser white light emitting device of display

Technical field

This utility model relates to a kind of for illuminating or the laser white light emitting device of display, belongs to illumination and display neck Territory.

Background technology

Illumination originates in the electric filament lamp of Edison's utility model, the most successively utility model low-pressure sodium lamp, fluorescent lamp, High voltage mercury lamp, metal halide lamp, high-pressure mercury lamp, three-color fluorescent lamp, compact fluorescent lamp, HF lamp without electrodes and light-emitting diodes The electric light sources such as pipe LED.The generally evaluation criterion of light source has the parameters such as efficiency, luminous flux, color rendering index, colour temperature, wherein light source energy Its power saving capability of high low reaction of effect, LED white light source has the feature such as high energy efficiency, long-life, is recognized For being the green illumination light source after electric filament lamp, daylight lamp.

At present at lighting field, many employing LEDs do excitation source, excite corresponding fluorescent material to obtain white light Light source.White light source based on light emitting diode has four major programmes: the first scheme is to use blue light-emitting diode Exciting yellow fluorescent powder, fluorescent material is transmitting gold-tinted under the exciting of blue light, then mixes with the some blue light appeared, by complementary color principle And presenting white light, white light color rendering index prepared by the program compares with temperature and operating current change than relatively low and white light parameter Greatly；First scheme is directly to be mixed into white light by red-green-blue light emitting diode, due to the effect of three light emitting diodes Rate, luminous power are with asynchronous changes of parameter such as injection current, temperature, times, therefore it is required that the highest control circuit；The third Scheme is to be excited red-green-blue fluorescent material by ultraviolet or near ultraviolet light emitting diode, owing to people's vision is to ultraviolet or near ultraviolet Light is insensitive, and the color of this white light is only determined by fluorescent material, and therefore program color rendering index is high and white light parameter is more stable, 4th kind of scheme is to do light source activation yellow fluorescent powder with blue laser, and fluorescent material excites lower transmitting Huang at the laser instrument of blue light Light, then mix with the some blue light appeared, complementary color principle present white light.

In above these four scheme, being all that light source activation fluorescent material produces white light, the shortcoming of excitated fluorescent powder luminescence has: 1, fluorescent material at high temperature work long hours decay the most serious；2, the fluorescent material decay of different colours is inconsistent, uses one section After time, light source easily produces color drift；3, fluorescent material makes all to be used in mixed way with silica gel, and silica gel is yellow under long-time high temperature Becoming causes light efficiency to decline.The most not using light-emitting phosphor is one of the most maximum technological difficulties.

Utility model content

The purpose of this utility model is to provide a kind of for illuminating or the laser white light emitting device of display, this laser white light Light-emitting device uses transparent fluorescent ceramic to replace light-emitting phosphor, thus obtains white light source, have high energy efficiency, high light flux and High thermal stability, therefore, it is possible to fluorescent material decay causes light source fails when avoiding high temperature.

What this utility model provided is used for illumination or the laser white light emitting device of display, including heat sink substrate, quasiconductor Chip of laser and transparent fluorescent ceramic；

Described semiconductor laser chip lasing blue light；

Described semiconductor laser chip is fixed in described heat sink substrate；

Described semiconductor laser chip is packaged by described transparent fluorescent ceramic.

In above-mentioned laser white light emitting device, described semiconductor laser chip is welded in described heat sink substrate；

Described heat sink substrate is made up of aluminum, copper, aluminium nitride or aluminium oxide.

In above-mentioned laser white light emitting device, the exiting surface of described transparent fluorescent ceramic can be curved surface, such as sphere.

In above-mentioned laser white light emitting device, the exiting surface plating anti-reflection film of described transparent fluorescent ceramic, light to improve Rate, reduces the scattering of exiting surface.

In above-mentioned laser white light emitting device, the incidence surface of described transparent fluorescent ceramic plates anti-reflection film and reflection successively Film, i.e. plates two membranes on described incidence surface, and the effect of described anti-reflection film is to increase laser instrument and enters light rate, the work of described reflectance coating With being to prevent white light reflection, improve white light light emission rate.

In above-mentioned laser white light emitting device, the non-exiting surface of described transparent fluorescent ceramic and the plating total reflection of non-incidence surface Film, the most described transparent fluorescent ceramic plates described total reflection film with the faying face of described heat sink substrate, to reduce white light loss, improves White light light emission rate.

In above-mentioned laser white light emitting device, the molecular formula of described transparent fluorescent ceramic is Y₃Al₅O₁₂:xCe³⁺, wherein, X is the number between 0～0.05, such as 0.03.

In above-mentioned laser white light emitting device, described transparent fluorescent ceramic is prepared according to the method comprised the steps:

Ceramic material powder and sintering aid are sintered and get final product；

Described ceramic material powder is Al₂O₃、Y₂O₃And CeO₂；

Described sintering aid is MgO and SiO₂In at least one.

In above-mentioned laser white light emitting device, described sintering includes vacuum-sintering and the annealing carried out successively；

The temperature of described vacuum-sintering is 1730～1800 DEG C, and temperature retention time is 5～30 hours, and vacuum is 10^-3～10^-5Pa；

The condition of described annealing is: be incubated 5～40 hours under conditions of 1200～1500 DEG C, then cold with stove But.

The consumption of described sintering aid is the 0～1% of the gross mass of described ceramic material powder, such as 1%；

Described Al₂O₃, described Y₂O₃With described CeO₂Mol ratio be Y according to molecular formula₃Al₅O₁₂:xCe³⁺Middle element al, Y It is calculated with the stoichiometric proportion of Ce.

This utility model laser white light emitting device can make in accordance with the following steps:

Described semiconductor laser chip is fixedly welded in heat sink substrate, the transparent fluorescent ceramic of sintering preparation is entered Row coating film treatment, is then packaged the transparent fluorescent ceramic after plated film described semiconductor laser chip, and is fixed on In described heat sink substrate, i.e. obtain described laser white light emitting device.

Described semiconductor laser chip, by exciting the transparent fluorescent ceramic after plated film, can make transparent fluorescent ceramic produce Raw white light.

Transparent fluorescent ceramic is also this practicality in the application made in the laser white light emitting device of illumination or display Novel protection domain.

What this utility model provided is used for illumination or the laser white light emitting device of display, utilizes excitation wavelength to be positioned at blue light Semiconductor laser replace existing light emitting diode as excitation source, in order to excite transparent fluorescent ceramic to make it turn white Light, its advantage is mainly manifested in following aspect:

1, semiconductor laser chip is easier to realize high power and high electro-optical efficiency exports, and core devices performance Raising will result directly in the raising of prepared white light source performance.

2, transparent fluorescent ceramic is combined by this utility model with the chip of excitation source, it is to avoid fluorescent material and silica gel are because of device Part generates heat and causes decline or the light source fails of luminous efficiency；If according to application needs, the heat resistance of transparent fluorescent ceramic makes Device is operated in high electric current high temperature environment, it is to avoid when high temperature or high injection current work, device output power and electric light turn Change the decline of efficiency.

3, transparent fluorescent ceramic is combined by this utility model with the chip of excitation source, the Heat-resistant stable of transparent fluorescent ceramic Property makes the power of laser white light devices improve.

4, it is easy to shaping due to the hot spot of semiconductor laser, even can be coupled into optical fiber output, so can use Which produces the solid-state white device with specific use.

Accompanying drawing explanation

Fig. 1 is to make this utility model for illumination or the flow chart of the laser white light emitting device of display.

Fig. 2 is that this utility model is for illumination or the transparent fluorescent ceramic schematic diagram of the laser white light emitting device of display.

Fig. 3 is that this utility model is for illumination or the structural representation of the laser white light emitting device of display.

Fig. 4 is this utility model luminous light shape signal for illumination or the laser white light emitting device white light source of display Figure.

Fig. 5 is that this utility model is for illumination or the spectral distribution curve figure of the laser white light emitting device of display.

In figure, each labelling is as follows:

1 transparent fluorescent ceramic, 2 go out light antireflective coating, 3 enter light antireflective coating, 4 enter light total reflection film layer, 5 heat sink substrate knot Close total reflection film layer, 6 heat sink substrate, 7 semiconductor laser chips, 8 laser white light devices light emission directions.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is described further, but this utility model is not limited to following enforcement Example.

Fig. 1 is to prepare for illumination or the flow chart of the laser white light emitting device of display, enters according to the flow process shown in Fig. 1 Row preparation:

Prepare transparent fluorescent ceramic:

Accurately weigh Al₂O₃、Y₂O₃And CeO₂And be fully ground, wherein, mol ratio CeO₂、Y₂O₃、Al₂O₃Mole Ratio is 18:291:5 (wherein x=0.03).Adding sintering aid MgO in ground powder body, its quality consumption is total raw material The 1% of powder body, is then 10 in vacuum^-4Carrying out vacuum-sintering under conditions of Pa, sintering temperature is 1780 DEG C, and temperature retention time is 20 hours；Last insulation at 1400 DEG C is annealed for 25 hours, and furnace cooling i.e. obtains transparent fluorescent ceramic Y₃Al₅O₁₂:xCe^{3 +}, x=0.03.

Transparent fluorescent ceramic is carried out coating film treatment:

The exiting surface of transparent fluorescent ceramic 1 being plated anti-reflection film, obtains light antireflective coating 2, incidence surface plates successively and increases into light Permeable membrane layer 3 and enter light total reflection film layer 4, non-go out light and incidence surface plating total reflection film obtain total reflection film layer, i.e. heat sink substrate knot Close total reflection film layer 5, as shown in Figure 2.

The semiconductor laser chip 7 solder (tin cream etc.) that excitation wavelength is positioned at blue light is welded in heat sink substrate 6, Again the transparent fluorescent ceramic 1 after coating film treatment is fixed on heat sink substrate (by aluminium nitride substrate. aluminum oxide substrate or copper base etc. Other high heat-conductings are made) on 6, and noise spectra of semiconductor lasers chip 7 realizes encapsulation, and the exiting surface making transparent fluorescent ceramic is Sphere, i.e. obtains this utility model for illuminating or the laser white light emitting device of display, as shown in Figure 3.

This utility model prepare for illumination or display laser white light emitting device, during use, semiconductor laser Transparent fluorescent ceramic is excited to produce white light, as shown in Figure 4.

The integrating sphere measurement result of this utility model laser white light emitting device is as shown in table 1.

Table 1 laser white light emitting device integrating sphere measurement data

By the data in table 1 it can be seen that for current industry main flow white light emitting device, use this practicality new The advantage that white light obtained by the laser white light emitting device of type has high energy efficiency, high light flux and high thermal stability.

The spectral distribution graph of this utility model laser white light emitting device is as it is shown in figure 5, by this figure it can be seen that use this Emission spectrum seriality obtained by the white light of utility model is good, color rendering properties is good.

By above-mentioned analysis it can be seen that the white light that this utility model laser white light emitting device produces has high energy efficiency, height Luminous flux and the feature of high thermal stability.

Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect Step describes in detail, be it should be understood that and the foregoing is only specific embodiment of the utility model, is not limited to this Utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, all should wrap Within being contained in protection domain of the present utility model.

Claims (6)

1. the laser white light emitting device being used for illumination or display, it is characterised in that: described laser white light emitting device bag Include heat sink substrate, semiconductor laser chip and transparent fluorescent ceramic；

Described semiconductor laser chip lasing blue light；

Described semiconductor laser chip is fixed in described heat sink substrate；

Described semiconductor laser chip is packaged by described transparent fluorescent ceramic.

Laser white light emitting device the most according to claim 1, it is characterised in that: described semiconductor laser chip welds In described heat sink substrate.

Laser white light emitting device the most according to claim 1 and 2, it is characterised in that: going out of described transparent fluorescent ceramic Bright finish is curved surface.

Laser white light emitting device the most according to claim 3, it is characterised in that: the exiting surface of described transparent fluorescent ceramic Plating anti-reflection film.

Laser white light emitting device the most according to claim 4, it is characterised in that: the incidence surface of described transparent fluorescent ceramic Plating anti-reflection film and reflectance coating successively.

Laser white light emitting device the most according to claim 5, it is characterised in that: described transparent fluorescent ceramic non-go out light Face and non-incidence surface plating total reflection film.