CN203084375U - Display device - Google Patents
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- CN203084375U CN203084375U CN 201320033553 CN201320033553U CN203084375U CN 203084375 U CN203084375 U CN 203084375U CN 201320033553 CN201320033553 CN 201320033553 CN 201320033553 U CN201320033553 U CN 201320033553U CN 203084375 U CN203084375 U CN 203084375U
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Abstract
The utility model discloses a display device which is used for solving the problem that display devices in the prior art are narrow in color gamut and luminous efficacy. The display device comprises a blue-light backlight source and a liquid crystal display panel. The liquid crystal display panel comprises an upper substrate, a lower substrate and a liquid crystal layer which is located between the upper substrate and the lower substrate. The upper substrate or the lower substrate comprises a color film layer which comprises black matrix graphs, red pixel graphs and green pixel graphs. A first passivation layer is arranged between a layer where the red pixel graphs are located and a layer where the black matrix graphs are located or between a layer where the green pixel graphs are located and the layer where the black matrix graphs are located. A second passivation layer is arranged between the layer where the red pixel graphs are located and the layer where the green pixel graphs are located. The red pixel graphs are quantum dot material film graphs which emit red light under the excitation function of blue light. The green pixel graphs are quantum dot material film graphs which emit green light under the excitation function of the blue light.
Description
Technical field
The utility model relates to technical field of liquid crystal display, relates in particular to a kind of display device.
Background technology
Existing LCD display is that TFT substrate and color membrane substrates are fitted mutually, comprise backlight 1' and display panels 2' as shown in Figure 1, wherein display panels 2' comprises upper substrate 21', infrabasal plate 22' and liquid crystal material 23', includes red pixel region 202', green pixel district 203', the blue pixel region 204' of black matrix 201', black matrix pattern encirclement on upper substrate 21'.Employed white backlight is to excite yag crystal YAG fluorescent powder to send gold-tinted and blue light forms with blue chip, luminescence efficiency is low, color is impure, again through the R of color rete CF G B to filter the resulting colour gamut in back lower, color is bright-coloured inadequately true.Therefore how improving effect is the problem that prior art faces.
And normally a kind of nano particle of forming by II-VI family or III-V family element of quantum dot (Quantum Dot), can emitting fluorescence after being excited, luminescent spectrum can be controlled by the size that changes quantum dot, and its fluorescence intensity and stability are all fine, are a kind of good embedded photoluminescent materials.The kind of quantum dot is a lot, the representational CdS/CdSe/CdTe/ZnO/ZnS/ZnSe/ZnTe that II-VI family is arranged etc. and the GaAs of III-V family, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb etc.The quantum dot of same substance wherein, according to its size difference of preparing, the light that is emitted is also different.At present, the technical scheme of backlight has appearred quanta point material is applied in prior art, can improve luminescence efficiency to a certain extent, but it is wide how can to obtain a colour gamut, and the display device that light efficiency is high is still the problem that prior art faces.
The utility model content
The utility model embodiment provides a kind of display device, in order to solve the problem that the display device colour gamut is narrow, light efficiency is low in the prior art.
A kind of display device that the utility model embodiment provides comprises blue light backlight and display panels, and described display panels comprises upper substrate, infrabasal plate and the liquid crystal layer between upper substrate and infrabasal plate;
Described upper substrate or infrabasal plate comprise color rete, and described color rete comprises black matrix figure, and red pixel graphics and green pixel figure;
Be provided with first passivation layer between described red pixel graphics place layer or described green pixel figure place layer and the black matrix figure place layer;
Be provided with second passivation layer between described red pixel graphics place layer and the described green pixel figure place layer;
Described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
The display device that the utility model provides, by with blue light as backlight, quanta point material is introduced color rete, red pixel graphics that is subjected to blue-light excited red-emitting and the green pixel figure that is subjected to blue-light excited transmitting green light are set in color rete respectively, because the light monochromaticity that quanta point material is excited to send is good, intensity and stability are high, therefore traditional relatively display screen, colour gamut is wider, and light efficiency is higher.Simultaneously,, therefore in color rete, saved the preparation of blue pixel graphics, thereby also reduced technological process, reduced cost owing to adopted blue light as backlight.
Description of drawings
Fig. 1 is the structural representation of LCD display in the prior art;
The structural representation of a kind of display device that Fig. 2 provides for the utility model embodiment;
The structural representation of the another kind of display device that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the structural representation of display panel in the structure shown in Figure 3.
Embodiment
The utility model embodiment provides a kind of display device and preparation method, in order to solve the problem that the display device colour gamut is narrow, light efficiency is low in the prior art.
Below in conjunction with accompanying drawing the utility model is described.
Referring to Fig. 2, a kind of display device that the utility model embodiment provides comprises blue light backlight 1 and display panels 2, and described display panels comprises upper substrate 21, infrabasal plate 22 and the liquid crystal layer between upper substrate and infrabasal plate 23; Described upper substrate 21 comprises color rete 20, and described color rete 20 comprises black matrix figure 201, and red pixel graphics 202 and green pixel figure 203; Be provided with first passivation layer 241 between described red pixel graphics 202 place layers and the black matrix figure place layer; Be provided with second passivation layer 242 between described red pixel graphics 202 place layers and the described green pixel figure 203 place layers; And the protective seam 243 that on described green pixel figure 203 place layers, is provided with; Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
As shown in Figure 3, the another kind of structure of a kind of display device that the utility model embodiment provides, comprise blue light backlight 1 and display panels 2, described display panels upper substrate 21, infrabasal plate 22 and the liquid crystal layer between upper substrate and infrabasal plate 23; Described infrabasal plate 22 comprises color rete 20, and described color rete 20 comprises black matrix figure 201, and red pixel graphics 202 and green pixel figure 203; Be provided with first passivation layer 241 between described red pixel graphics 202 place layers and the black matrix figure place layer; Be provided with second passivation layer 242 between described red pixel graphics 202 place layers and the described green pixel figure 203 place layers; And the protective seam 243 that on described green pixel figure 203 place layers, is provided with; Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
By with blue light as backlight, quanta point material is introduced color rete, red pixel graphics that is subjected to blue-light excited red-emitting and the green pixel figure that is subjected to blue-light excited transmitting green light are set in color rete respectively, because the light monochromaticity that quanta point material is excited to send is good, intensity and stability are high, so traditional relatively display screen, colour gamut is wider, and light efficiency is higher.Simultaneously,, therefore in color rete, saved the preparation of blue pixel graphics, thereby also reduced technological process, reduced cost owing to adopted blue light as backlight.On the other hand, middle compared to existing technology OLED organic luminous layer is because quanta point material is a phosphor; can oxidized and moisture attacks; preparation technology need not to carry out under the protection of vacuum or inert gas, thereby has reduced cost, has improved stability and life-span.
Preferably, described upper substrate comprises top glass substrate and color rete, and described infrabasal plate comprises tft array substrate; Wherein, described black matrix figure place layer is positioned at the top of described red pixel graphics place layer and green pixel figure place layer.Adopt this structure, upper substrate need be become display panels with infrabasal plate and liquid crystal material to box-like, the technological process to box in the prior art is comparatively ripe, realizes easily.
Preferably, described upper substrate comprises top glass substrate, and described infrabasal plate comprises tft array substrate and color rete; Wherein, described black matrix figure place layer is positioned at the below of described red pixel graphics place layer and green pixel figure place layer.Color rete is arranged on the infrabasal plate, need not the problem of considering that upper substrate and infrabasal plate bring the technology of box.For example, in the prior art in link to box, certain deviation is arranged, such as, deviation is more than 5 μ m, and the process deviation of the mask of the black matrix image of making is about 1 μ m, therefore, color rete is arranged on infrabasal plate, has saved the problem of the deviation that may bring box, therefore compare the technology of box, can improve certain aperture opening ratio.
Preferably, the top of described red pixel graphics and described green pixel figure is provided with the blue light wave filtering layer.In the technical scheme that the utility model provides, the blue light backlight is on the one hand as excitation source, excite red pixel graphics and green pixel figure red-emitting and green glow respectively, on the other hand, the blue light backlight is as the source of blue pixel, form the red, green and blue three primary colours jointly with red, green glow, combination and carry out the colorful demonstration of picture.But, because preparation technology's restriction, after blue light red pixel graphics of process and green pixel figure may occurring, also has remaining blue light outgoing, therefore, above red pixel graphics and green pixel figure the blue light wave filtering layer is set, what this blue light wave filtering layer adopted is blue filter, and filter is a kind of material that can change spectral component or limit the vibration plane of light.And blue filter can be with wavelength at the 480nm(blue light) below light absorption, and see through the material of the above light of 480nm.Therefore through after red pixel graphics and the green pixel figure, the outgoing completely of the ruddiness of outgoing and green glow, and remaining blue light will be absorbed, and can not appear at red pixel graphics and green pixel graphics field, thereby can obtain the high red, green, blue three primary colours pixel of monochromaticity.For example: N-methyl-2-pyrrole aldehyde and if tannin is a raw material, under piperidines catalysis, synthesized a kind of if tannin blue light merocyanine dye, should be if tannin blue light merocyanine dye be existing a kind of dyestuff that has been synthesized use.In addition, this blue light wave filtering layer can be arranged on upper substrate and outer field going up between the polaroid, also can be arranged on other positions, as long as can shield remaining blue light.
Preferably, described blue light backlight is the LED-backlit source.Adopt LED as backlight, other light sources monochromaticity is better relatively, and the light efficiency height of LED.
Preferably, this display device also comprises: go up polaroid and following polaroid; Wherein go up polaroid and be positioned at a upper substrate side of liquid crystal layer dorsad, following polaroid is positioned at an infrabasal plate side of liquid crystal layer dorsad.
Preferably, described quanta point material is the nano particle that II-VI family or III-group are formed.The quanta point material that adopts in the utility model is at present technical ripe quanta point material, for example, CdS/CdSe/CdTe/ZnO/ZnS/ZnSe/ZnTe of II-VI family etc. and the GaAs of III-V family, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb etc.With a kind of amount of substance point material, the size of its quantum dot, i.e. the size difference of nano particle, the light wavelength of stimulated luminescence is also different.In the technology of red pixel graphics of preparation and green pixel figure, generally adopt the material of the different size of same substance.
Preferably, the thickness of described film pattern is 10～30nm.Because the size of quanta point material all at Nano grade, distributes if therefore can realize the individual layer of quanta point material, the efficient of its stimulated luminescence will present 100%, but because the restriction of preparation technology and cost, individual layer distributes and is difficult to accomplish.In the utility model, the thickness of film pattern is advisable at 10～30nm, at first is easy on the technology realize, and can guarantees the light efficiency of emergent light.
Preferably, described quanta point material is ZnS, described red pixel graphics quantum dot be of a size of 9～10nm, the quantum dot of described green pixel figure is of a size of 7～8nm.Quanta point material as previously described has a lot, but metals such as Cd and Hg have toxicity, so under identical production environment, preferred ZnS.Certainly, other quanta point material also is the material that can be used as color rete, compares ZnS, as long as be equipped with tighter production safeguard measure.
The preparation method of a kind of display device that the utility model embodiment provides, with the encapsulation of display panels and blue light backlight, wherein, and the color rete of preparation on the upper substrate of display panels or infrabasal plate, the described method for preparing color rete comprises:
Form the black matrix figure of patterning;
On the substrate that forms black matrix figure, form first passivation layer;
On the substrate that forms first passivation layer, form red pixel graphics;
On the substrate that forms red pixel graphics, form second passivation layer;
On the substrate that forms second passivation layer, form the green pixel figure;
Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
The preparation method of the another kind of display device that the utility model embodiment provides, with the encapsulation of display panels and blue light backlight, wherein, and the color rete of preparation on the upper substrate of display panels or infrabasal plate, the described method for preparing color rete comprises:
Form the black matrix figure of patterning;
On the substrate that forms black matrix figure, form first passivation layer;
On the substrate that forms first passivation layer, form the green pixel figure;
On the substrate that forms red pixel graphics, form second passivation layer;
On the substrate that forms second passivation layer, form red pixel graphics;
On the substrate that forms the green pixel figure, form the 3rd passivation layer;
Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
Further, among the above-mentioned preparation method, in the step of red pixel graphics of preparation and green pixel figure, relate to the preparation method of quantum dot thin layer.Quantum dot preparation method kind is a lot, and as stated in the Background Art, the utility model does not relate to, and can directly buy the quantum dot for preparing; What red pixel graphics of the utility model and green pixel figure related to is the preparation of quantum dot thin layer, and method is also a lot of in the prior art, as spin-coating method etc.In the prior art for preparing thin-film process, relate to certain electrochemical conditions, comprise and utilize organic solvent dissolution quanta point material and follow-up heating to make its evaporation, for example at the ZnS quanta point material to organic solvent, organic solvent can be absolute ethyl alcohol etc., and the temperature of heating is at 100-200 ℃.Existing layer all is insoluble to organic solvent in these chemical processes, and existing preparation technology can be through 250 ℃ of annealing, so heating evaporation can not impact existing technology yet.
Preferably, described preparation method also comprises: after upper substrate and infrabasal plate are to box, and before with the encapsulation of liquid crystal panel and blue light backlight, upper substrate dorsad a side of liquid crystal layer prepare the blue light wave filtering layer, described blue light wave filtering layer is above described red pixel graphics and described green pixel figure.
Preferably, described preparation method also comprises: after upper substrate and infrabasal plate are to box, and before with liquid crystal panel and the encapsulation of blue light backlight, at upper substrate polaroid on a side of liquid crystal layer is fitted dorsad, at infrabasal plate polaroid under a side of liquid crystal layer is fitted dorsad.
Below in conjunction with accompanying drawing and preferred embodiment, display panel and preparation method in the display device that the utility model is provided are elaborated.Need to prove that this preferred embodiment only is for clearer explanation the utility model, but does not limit the utility model.
Referring to Fig. 4, the display panel 2 in the display device that this preferred embodiment provides comprises: upper substrate 21, infrabasal plate 22, the liquid crystal material 23 between upper substrate 21 and the infrabasal plate 22, and envelope frame glue 40; In a upper substrate side of liquid crystal material dorsad, be provided with polaroid 31, infrabasal plate dorsad a side of liquid crystal material be provided with polaroid 32 down;
Described upper substrate 21 is a glass substrate;
Described infrabasal plate 22 comprises color rete 20 and tft array substrate 50; Described color rete 20 comprises black matrix figure 201, and red pixel graphics 202 and green pixel figure 203; Be provided with first passivation layer 241 between described red pixel graphics 202 place layers or described green pixel figure 203 place layers and the black matrix figure place layer; Be provided with second passivation layer 242 between described red pixel graphics 202 place layers and the described green pixel figure 203 place layers; And described black matrix figure 201 place layers are positioned at the below of described red pixel graphics 202 place layers and green pixel figure 203 place layers.Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down; Need to prove that herein the upper-lower position of red pixel graphics and green pixel figure place layer can exchange, and can realize aim of the present utility model equally.
Be provided with the blue light wave filtering layer 60 of patterning between upper substrate 21 and the last polaroid 31, on the direction of vertical panel, this blue light wave filtering layer 60 covers red pixel graphics 202 and green pixel figure 203, to play the effect of filtering remaining blue light.In this preferred embodiment, select for use 5-(1-methyl-2-pyrroles's methine) as if the material of tannin as the blue light wave filtering layer.
Wherein, tft array substrate 50 adopts tft array substrate of the prior art, be included in the pattern that forms grid line on the glass substrate, on grid line layer, prepare gate insulation layer, form drain-source level and data line layer afterwards to form the pattern (, can be divided into five technologies and four technologies) of tft array, after TFT forms according to preparation technology, form pixel electrode layer and insulation course, form the common electrode layer of strip at last at the top of tft array substrate one deck.This is prior art, repeats no more, and also should not be construed restriction of the present utility model.
Preparation method to this preferred embodiment describes below.Referring to Fig. 4, on the TFT substrate, make the black matrix 201 of one deck earlier equally by graphic designs; Make the red pixel graphics 202 of one deck by design configuration again after depositing first passivation layer, 241 planarized surfaces; Deposit second layer passivation 242 again, on second layer passivation layer 242, press design configuration again and make one deck green pixel figure 203, and deposit 243 protections of the 3rd layer of passivation layer.Concrete, be example with the preparation process of red pixel graphics 202.What choose in this preferred embodiment is the ZnS quanta point material, the quanta point material of the red-emitting selected is dissolved in the organic solvent, utilize spin-coating method that it is coated on first passivation layer, carry out annealing in process afterwards, make its evaporation with the heating organic solvent, finally form uniform red pixel graphics.The technology of the uniform quantum dot film of preparation is more in the prior art, does not repeat them here.In this preferred version, annealing temperature is chosen in 100-200 ℃, for example can be 150 ℃.Because in the technology of the preparation quantum dot film of prior art, 250 ℃ temperature can not impact existing layer, so the annealing temperature in this preferred version suits.
Owing to select blue direct irradiation backlight, thus need not to make blue pixel layer, so far, based on the COA(CF on Array of technology of quantum dots) substrate manufacture finishes.
Behind the dispenser method 23, upper substrate 21 encapsulation of fitting and having blue light filter layer 60; Upper and lower base plate sticks polaroid 31 and following polaroid 32 respectively.So far, the display panels preparation is finished.So, display panels and backlight encapsulation with preparation is finished form display device.
Select 1 irradiation of blue LED-backlit, send high-purity ruddiness through the filtration of red pixel graphics 202 conversions and blue light wave filtering layer 60; High-purity green glow is sent in the filtration of 203 conversions of green pixel figure and blue light wave filtering layer 60; And the direct outgoing backlight of backlight 1 high pure blue, can obtain the R/G/B three primary colours, control the R/G/B GTG by liquid crystal layer, thereby obtain the gay colours of various needs.
In sum, display device that the utility model embodiment provides and preparation method, by with blue light as backlight, quanta point material is introduced color rete, red pixel graphics that is subjected to blue-light excited red-emitting and the green pixel figure that is subjected to blue-light excited transmitting green light are set, respectively in color rete because the light monochromaticity that quanta point material is excited to send is good, intensity and stability are high, so traditional relatively display screen, colour gamut is wider, and light efficiency is higher.Simultaneously,, therefore in color rete, saved the preparation of blue pixel graphics, thereby also reduced technological process, reduced cost owing to adopted blue light as backlight.In addition, the setting of blue light wave filtering layer has more increased the purity of emergent light; With the scheme of color rete preparation on infrabasal plate, the deviation when need not to consider color film and tft array substrate to box, thus can keep high aperture opening ratio.And quanta point material is an inorganic material, and the protection of needing no vacuum conditioned disjunction inert gas has more reduced production cost in the preparation process.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (9)
1. a display device is characterized in that, described display device comprises blue light backlight and display panels, and described display panels comprises upper substrate, infrabasal plate and the liquid crystal layer between upper substrate and infrabasal plate;
Described upper substrate or infrabasal plate comprise color rete, and described color rete comprises black matrix figure, and red pixel graphics and green pixel figure;
Be provided with first passivation layer between described red pixel graphics place layer or described green pixel figure place layer and the black matrix figure place layer;
Be provided with second passivation layer between described red pixel graphics place layer and the described green pixel figure place layer;
Wherein, described red pixel graphics is the blue-light excited quanta point material film pattern of red-emitting down, and the green pixel figure is the blue-light excited quanta point material film pattern of green glow down.
2. device according to claim 1 is characterized in that, described upper substrate comprises top glass substrate and described color rete, and described infrabasal plate comprises tft array substrate; Wherein, described black matrix figure place layer is positioned at the top of described red pixel graphics place layer and green pixel figure place layer.
3. device according to claim 1 is characterized in that described upper substrate comprises top glass substrate, and described infrabasal plate comprises tft array substrate and described color rete; Wherein, described black matrix figure place layer is positioned at the below of described red pixel graphics place layer and green pixel figure place layer.
4. device according to claim 1 is characterized in that, the top of described red pixel graphics and described green pixel figure is provided with the blue light wave filtering layer.
5. device according to claim 1 is characterized in that, described blue light backlight is the LED-backlit source.
6. device according to claim 1 is characterized in that, also comprises: go up polaroid and following polaroid; Wherein go up polaroid and be positioned at a upper substrate side of liquid crystal layer dorsad, following polaroid is positioned at an infrabasal plate side of liquid crystal layer dorsad.
7. according to the described device of the arbitrary claim of claim 1～6, it is characterized in that described quanta point material is the nano particle that II-VI family or III-group are formed.
8. device according to claim 7 is characterized in that, the thickness of described film pattern is 10～30nm.
9. device according to claim 8 is characterized in that, described quanta point material is ZnS, and the quantum dot of described red pixel graphics is of a size of 9～10nm, and the quantum dot of described green pixel figure is of a size of 7～8nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320033553 CN203084375U (en) | 2013-01-22 | 2013-01-22 | Display device |
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| CN 201320033553 CN203084375U (en) | 2013-01-22 | 2013-01-22 | Display device |
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| CN203084375U true CN203084375U (en) | 2013-07-24 |
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| CN 201320033553 Withdrawn - After Issue CN203084375U (en) | 2013-01-22 | 2013-01-22 | Display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091895A (en) * | 2013-01-22 | 2013-05-08 | 北京京东方光电科技有限公司 | Display device and manufacturing method thereof |
| CN104516039A (en) * | 2014-12-23 | 2015-04-15 | 深圳市华星光电技术有限公司 | Manufacturing method for quantum dot color light filter and liquid crystal display device |
| TWI574055B (en) * | 2013-08-14 | 2017-03-11 | 鴻海精密工業股份有限公司 | Display panel |
| CN106526975A (en) * | 2017-01-05 | 2017-03-22 | 京东方科技集团股份有限公司 | Display panel and display device |
-
2013
- 2013-01-22 CN CN 201320033553 patent/CN203084375U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091895A (en) * | 2013-01-22 | 2013-05-08 | 北京京东方光电科技有限公司 | Display device and manufacturing method thereof |
| CN103091895B (en) * | 2013-01-22 | 2015-12-09 | 北京京东方光电科技有限公司 | A kind of display device and preparation method |
| US9360698B2 (en) | 2013-01-22 | 2016-06-07 | Beijing Boe Optoelectronics Technology Co., Ltd. | Display device comprising a color filter layer wherein a black matrix pattern, a red pixel pattern, and a green pixel pattern are disposed in different layers |
| TWI574055B (en) * | 2013-08-14 | 2017-03-11 | 鴻海精密工業股份有限公司 | Display panel |
| CN104516039A (en) * | 2014-12-23 | 2015-04-15 | 深圳市华星光电技术有限公司 | Manufacturing method for quantum dot color light filter and liquid crystal display device |
| CN106526975A (en) * | 2017-01-05 | 2017-03-22 | 京东方科技集团股份有限公司 | Display panel and display device |
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Effective date of registration: 20150710 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE Technology Group Co., Ltd. Patentee after: Beijing BOE Photoelectricity Science & Technology Co., Ltd. Address before: 100176 Beijing city in Western Daxing District economic and Technological Development Zone, Road No. 8 Patentee before: Beijing BOE Photoelectricity Science & Technology Co., Ltd. |
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