CN203786412U - Light source system used for eliminating laser speckle - Google Patents
Light source system used for eliminating laser speckle Download PDFInfo
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- CN203786412U CN203786412U CN201420041481.6U CN201420041481U CN203786412U CN 203786412 U CN203786412 U CN 203786412U CN 201420041481 U CN201420041481 U CN 201420041481U CN 203786412 U CN203786412 U CN 203786412U
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Abstract
The utility model relates to a light source system used for eliminating laser speckle. The light source system used for eliminating the laser speckle comprises a blue LD light source set, a red LD light source set, a bearing plate of which the two relative surface sides are equipped with a set of reflectors respectively; a driving device used for driving the bearing plate to do the periodic translational that gets close to the blue LED light source set firstly and then is far away from the blue LED light source set in an advancing path of the blue light emitted by the blue LD light source set or driving the bearing plate to do the tiny rotation around a rotating shaft arranged at one end of the bearing plate; a light splitting device; a fluorescent color wheel; a first light composition device and a second light composition device; a filtering color wheel; a control device used for controlling the colored light emitted by the fluorescent wheel to correspond to the colored light allowed by the filtering color wheel to pass at the same time according to the target light power of the colored light and when the fluorescent color wheel rotates along the central shaft thereof; and a light collecting device, wherein the diffusion sheets are arranged in a blue light propagation path and a red light propagation path respectively. By the above mode, the light source system of the utility model can elimination the laser speckle.
Description
Technical field
The utility model relates to illumination and display technique field, particularly relates to a kind of light-source system for eliminate laser speckle.
Background technology
Monolithic DLP(Digital Light Processor Digital Light Processor) projector is because needs provide red, green, blue three kinds of colors on an imaging device simultaneously, its image-forming principle is by the colour wheel of a High Rotation Speed, to produce the projected image of full color, and colour wheel is comprised of red, green, blue three color lumps.Enjoy at present the light source of gazing to surely belong to LASER Light Source, but because the high coherence of pure color laser makes the speckle effect of projected image obvious, affected the image quality of Projection Display.
For solving the problems of the technologies described above, the utility model provides a kind of light-source system for eliminate laser speckle.
Utility model content
The technical matters that the utility model mainly solves is to provide a kind of light-source system for eliminate laser speckle, utilize drive unit to drive loading plate to do near a light source group and then away from the periodicity translation of this light source group or for driving loading plate to do minor rotation around upper rotating shaft arranging of loading plate, so that the facula position of the light of same LD outgoing of adjacent time on same optical device changes, and then can reduce the harmful effect of laser speckle, and then can improve the image quality of Projection Display.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of light-source system for eliminate laser speckle is provided, comprises:
Blue LD light source group;
Red LD light source group;
Loading plate, be arranged between blue LD light source group and red LD light source group, in two relative face side of described loading plate, be respectively arranged with one group of catoptron, wherein, one group of catoptron is used for the blue light of reflection blue LD light source group outgoing, and another group catoptron is for the ruddiness of reflection Red LD light source group outgoing;
Drive unit, for drive loading plate on the path of advancing of the blue light of blue LD light source group transmitting, do first near and then away from the periodicity translation of blue LD light source group or for driving loading plate to do minor rotation around the rotating shaft arranging on one of loading plate, wherein, described rotating shaft is perpendicular to the emergent ray of LD, so that the facula position of the light of same LD outgoing of adjacent time on same optical device changes;
Light-dividing device, is arranged on the travel path of blue light, for transmit blue and for the new coloured light producing of reflected fluorescent light colour wheel;
Fluorescence colour wheel, is arranged on the travel path of blue light of light-dividing device transmission, comprises at least two regions that are fan annular along its central shaft, and first area is for transmit blue, and second area is green glow reflect green light for converting blue light;
The first Multiplexing apparatus, is arranged on the point of crossing of travel path of the new coloured light producing of fluorescence colour wheel of ruddiness and light-dividing device reflection, for the mode by transmit red light and the new coloured light producing of reflection, ruddiness and the new coloured light light path producing is merged;
The second Multiplexing apparatus, merges ruddiness, blue light and the new coloured light light path producing for the mode of other coloured light of transmission by reflect blue;
Optical filtering colour wheel, be arranged on the downstream travel path of the coloured light that the second Multiplexing apparatus merges, described optical filtering colour wheel comprises at least three filter areas that are fan annular along its central shaft, the first filter area only allows blue light to pass through, the second filter area only allows green glow to pass through, and the 3rd filter area only allows ruddiness to pass through;
Control device, while rotating along its central shaft for control fluorescence colour wheel according to the target light power of each coloured light, from the coloured light of fluorescence colour wheel outgoing and synchronization optical filtering colour wheel, allow the coloured light that passes through corresponding, simultaneously for controlling the duty of red LD light source group and blue LD light source group power supply;
Light collecting device, for collecting the sequential light through the different colours of optical filtering colour wheel transmission;
Wherein, on the travel path of described blue light and ruddiness, be respectively provided with diffusion sheet.
Wherein, described fluorescence colour wheel further comprise along fluorescence colour wheel central shaft be fan annular spread for converting blue light, be the 3rd region of gold-tinted reflect yellow, at least three filter areas of optical filtering colour wheel further comprise the 4th filter area, and described the 4th filter area is for only allowing gold-tinted to pass through.
Wherein, described fluorescence colour wheel further comprise along fluorescence colour wheel central shaft be fan annular spread for converting blue light, be green light the 4th region of reflecting green light, at least three regions of optical filtering colour wheel further comprise the 5th region, and described the 5th region is for only allowing green light to pass through.
Wherein, between described the second Multiplexing apparatus and optical filtering colour wheel, be provided with optoisolator.
Wherein, described drive unit drives the amplitude of described loading plate translation for micron is to centimetre magnitude.
Wherein, the driving frequency of described drive unit is greater than 20HZ.
Wherein, the driving frequency of described drive unit is n times of optical filtering colour wheel rotational frequency, and wherein, n is natural number.
Wherein, n=1.
Wherein, the minute surface of each catoptron in one group of catoptron on described loading plate is different with the angle of loading plate, and the minute surface of each catoptron and the angle of loading plate in another group catoptron on described loading plate are also different.
Wherein, the minute surface of each catoptron in one group of catoptron on described loading plate is identical with the angle of loading plate, and the minute surface of each catoptron in another group catoptron on described loading plate is identical with the angle of loading plate.
The beneficial effects of the utility model are: the situation that is different from prior art, the light-source system for eliminate laser speckle that the utility model provides, utilize drive unit to drive loading plate to do near a light source group and then away from the periodicity translation of this light source group or for driving loading plate to do minor rotation around upper rotating shaft arranging of loading plate, so that the facula position of the light of same LD outgoing of adjacent time on same optical device changes, and then coordinate again the diffuser plate arranging on blue light and red transmission path, can eliminate laser speckle, and then can improve the image quality of Projection Display.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of the light-source system for eliminate laser speckle of the present utility model;
Fig. 2 is the structural representation of the second embodiment of the light-source system for eliminate laser speckle of the present utility model;
Fig. 3 is the structural representation of the first embodiment of the fluorescence colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1;
Fig. 4 is the structural representation of the first embodiment of the optical filtering colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1;
Fig. 5 is the structural representation of the second embodiment of the fluorescence colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1;
Fig. 6 is the structural representation of the second embodiment of the optical filtering colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1;
Fig. 7 is the structural representation of the 3rd embodiment of the fluorescence colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1;
Fig. 8 is the structural representation of the 3rd embodiment of the optical filtering colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1.
Embodiment
Refer to Fig. 1, Fig. 1 is the structural representation of the first embodiment of the light-source system for eliminate laser speckle of the present utility model.As shown in Figure 1, the light-source system for eliminate laser speckle of the present embodiment comprises: blue LD light source group 11, red LD light source group 12, loading plate 13, drive unit (not indicating), light-dividing device 18, fluorescence colour wheel 20, the first Multiplexing apparatus 31, the second Multiplexing apparatus 23, optical filtering colour wheel 36, control device (not shown) and light collecting device 38.Wherein, blue LD light source group 11 comprises a plurality of for launching the blue LD111 of blue light, and red LD light source group 12 comprises a plurality of red LD121 for red-emitting.
In the present embodiment, loading plate 13 is arranged between blue LD light source group 11 and red LD light source group 12, in two relative face side of loading plate 13, be respectively arranged with one group of catoptron, wherein, one group of catoptron (towards one group of catoptron of blue LD) is for the blue light of reflection blue LD light source group 11 outgoing, and another group catoptron is for the ruddiness of reflection Red LD light source group 12 outgoing.Particularly, there is a catoptron one to one with it in each LD on loading plate 13, is used for reflecting the emergent light of this LD, and each catoptron does not affect the propagation of the coloured light of other catoptrons reflections.
In the present embodiment, loading plate 13 has supporting drive unit, this drive unit for drive loading plate 13 on the path of advancing of the blue light of blue LD light source group 11 transmittings, do first near and then away from the periodicity translation of blue LD light source group 11 or for driving loading plate 13 to do minor rotation around the rotating shaft arranging on 13 1 of loading plates.Wherein, rotating shaft is perpendicular to the emergent ray of LD, so that the facula position that the light of same LD outgoing of adjacent time drops on same optical device changes.
In reality, at drive unit, drive in the process of loading plate 13 periodicity translations, loading plate 13 is periodically near red LD light source group 12 and then away from red LD light source group 12.Drive unit drives in the embodiment of loading plate 13 rotations, to having relatively high expectations of first focus lamp (as the focus lamp 14 and 24 in Fig. 1), require the size of first focus lamp larger, and concrete rotation maximum angular is determined jointly by the size of the condenser lens of selecting, loading plate, to guarantee that the light after the catoptron reflection on loading plate 13 does not exceed the scope of focus lamp.There is change in the facula position that drive unit drives loading plate 13 translations or rotation that adjacent temporally-coherent light is formed, when change frequency exceeds the resolution scope of human eye, the speckle that laser coherence causes obtains average, can weaken the harmful effect of interfering the laser speckle causing.In addition, be also provided with diffuser plate (for example, diffuser plate 16 and diffuser plate 26) on the travel path of red laser and blue laser, drive unit drives loading plate 13 translations or rotation, then combines the effect of diffuser plate, impact that can eliminate laser speckle.
In a preferred embodiment of the present utility model, preferably the amplitude of drive unit driving loading plate 13 translations is that micron is to centimetre magnitude.
In a preferred embodiment of the present utility model, the driving frequency of drive unit is greater than 20HZ.
In a preferred embodiment of the present utility model, preferably the driving frequency of drive unit be optical filtering colour wheel 36 rotational frequency n doubly, wherein n is natural number.
In another preferred embodiment of the present utility model, preferred n=1.
In embodiment of the present utility model, the minute surface of every group of catoptron on loading plate 13 can be selected to be parallel to each other.The minute surface of preferred every group of catoptron is not parallel to each other mutually, the minute surface of each catoptron in one group of catoptron of loading plate 13 is different from the angle of loading plate 13, and the minute surface of each catoptron in another group catoptron of loading plate 13 is also different with the angle of loading plate 13, but each angle is just slightly different.Catoptron is different from the angle of loading plate, makes the direction of vibration of the laser after catoptron reflection different, and laser after reflection is shown as converge light, and then makes the dimensional requirement of the first focus lamp be reduced.In the present embodiment, first the ruddiness of red LD light source group 12 outgoing reflex on lens 24 via one group of catoptron on loading plate 13, and the ruddiness after line focus incides on the first Multiplexing apparatus 31 successively after the reflection of catoptron 25, catoptron 28 and catoptron 30.In specific embodiment of the utility model, the optical device arranging in the light path between focus lamp 24 to first Multiplexing apparatus 31 is not limited to shown in Fig. 1.In preferred embodiment of the present utility model, can on the light path of catoptron 28, a focus lamp 27 be set again at catoptron 25, in the light path between catoptron 28 and catoptron 30, focus lamp 29 is set, can certainly omits according to concrete experiment condition focus lamp 27 and 29.
In embodiment of the present utility model, first the blue light of blue LD light source group 11 outgoing incides on catoptron 15 after focus lamp 14 focuses on, and then incide on light-dividing device 18 after 17 focusing of line focus mirror, blue light incides on fluorescence colour wheel 20 after light-dividing device 18 transmissions.Fluorescence colour wheel 20 comprises at least two regions that are fan annular along its central shaft, and first area is for transmit blue, and second area is green glow reflect green light for converting blue light.The new coloured light producing through the 20 wavelength conversions of fluorescence colour wheel is reflected to after light-dividing device 18, then is reflexed on the first Multiplexing apparatus 31 by light-dividing device 18.Between fluorescence colour wheel 20 and light-dividing device 18, a focus lamp 19 can be set.
The first Multiplexing apparatus 31 that the utility model adopts merges ruddiness and the new coloured light light path producing by the mode of the transmit red light reflected fluorescent light colour wheel 20 new coloured light that produce.After merging, light reflexes on the second Multiplexing apparatus 23 through catoptron 33 again.Blue light through 20 transmissions of fluorescence colour wheel also incides on the second Multiplexing apparatus 23, and the mode of the second Multiplexing apparatus 23 other coloured light of transmission by reflect blue merges ruddiness, blue light and the new coloured light light path producing.Coloured light after the second Multiplexing apparatus 23 light paths merge incides on optical filtering colour wheel 36.
In the present embodiment, optical filtering colour wheel 36 is arranged on the downstream travel path of the coloured light that the second Multiplexing apparatus 23 merges, described optical filtering colour wheel 36 comprises at least three filter areas that are fan annular along its central shaft, the first filter area only allows blue light to pass through, the second filter area only allows green glow to pass through, and the 3rd filter area only allows ruddiness to pass through.Sequential light after optical filtering colour wheel 36 filters enters to inject light collecting device 38, and incides on dmd chip after the even light of light collecting device 38.
Refer to Fig. 3, Fig. 3 is the structural representation of the first embodiment of the light-source system fluorescence colour wheel for eliminate laser speckle of the present utility model shown in Fig. 1.As shown in Figure 3, fluorescence colour wheel 20 comprises along its central shaft and is first area 201 and the second area 202 of fanning annular spread, blue light incides the rear transmission in first area 201, blue light excites green fluorescent material on second area 202 to produce green glow after inciding on second area 202, and second area 202 is reflective and not transmission.Wherein, first area 201 be transparent glassy layer or plated surface be provided with blue light anti-reflection film glassy layer again or empty region.The structural representation of the optical filtering colour wheel 36 of answering is in contrast shown in Figure 4.As shown in Figure 4, optical filtering colour wheel 36(optical filtering colour wheel) comprise three regions that are fan annular along its central shaft, first area 361 is for only allowing blue light to pass through, and second area 362 is for only allowing green glow to pass through, and the 3rd region 363 is for only allowing ruddiness to pass through.
Refer to Fig. 5 and Fig. 6, Fig. 5 is the structural representation of the second embodiment of the fluorescence colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1, and Fig. 6 is the structural representation of the second embodiment of the optical filtering colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1.Compare with the first embodiment shown in Fig. 3, the second embodiment of fluorescence colour wheel 20` shown in Fig. 5 is except comprising first area 201` and second area 202`, and fluorescence colour wheel 20` also further comprises that what along fluorescence colour wheel 20` central shaft, be fan annular spread is the 3rd region 203` of gold-tinted reflect yellow for converting blue light.Compare with Fig. 4, at least three filter areas of the optical filtering colour wheel 36` shown in Fig. 6 further comprise the 4th filter area 364`, and described the 4th filter area is for only allowing gold-tinted to pass through.
Refer to Fig. 7 and Fig. 8, Fig. 7 is the structural representation of the 3rd embodiment of the fluorescence colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1, and Fig. 8 is the structural representation of the 3rd embodiment of the optical filtering colour wheel of the light-source system for eliminate laser speckle of the present utility model shown in Fig. 1.Compare with the first embodiment shown in Fig. 3, the fluorescence colour wheel 20`` of the second embodiment shown in Fig. 7 except comprising first area 201`` and second area 202``, fluorescence colour wheel 20`` also further comprises along fluorescence colour wheel 20`` central shaft and is fan being the 3rd region 203`` of gold-tinted reflect yellow and being green light the 4th region 204`` that reflects green light for converting blue light for converting blue light of annular spread.Compare with Fig. 4, at least three filter areas of optical filtering colour wheel 36`` shown in Fig. 8 further comprise the 4th filter area 364`` and the 5th filter area 365``, described the 4th filter area 364`` is for only allowing gold-tinted to pass through, and the 5th filter area 365`` only allows green light to pass through.
Certainly, in other embodiment of the present utility model, fluorescence colour wheel is not limited to shown in Fig. 3, Fig. 5 and Fig. 7, optical filtering colour wheel is not limit shown in Fig. 4, Fig. 6 and Fig. 8 yet, fluorescence colour wheel also can comprise the region that produces other coloured light, the structure of colour wheel of correspondingly filtering also correspondingly changes to some extent, and the utility model does not limit this.
In embodiment of the present utility model, can between the second Multiplexing apparatus 23 and optical filtering colour wheel 36, optoisolator 35 be set, to prevent that reflected light from affecting the normal work of light source.
In specific embodiment of the utility model, a plurality of focus lamps that arrange on the travel path of light, to realize the focusing to light, are not limited to the focus lamp 27,29,17,19,22,32 and 34 shown in Fig. 1 certainly.
Refer to Fig. 2, Fig. 2 is the structural representation of the second embodiment of the light-source system for eliminate laser speckle of the present utility model.As shown in Figure 2, the light-source system of the present embodiment comprises blue LD light source group 11`, red LD light source group 12`, loading plate 13`, drive unit (not indicating), light-dividing device 25`, fluorescence colour wheel 27`, the first Multiplexing apparatus 18`, the second Multiplexing apparatus 20`, optical filtering colour wheel 32`, control device (not shown) and light collecting device 34`.Wherein, blue LD light source group 11` comprises a plurality of for launching the blue LD111` of blue light, and red LD light source group 12` comprises a plurality of red LD121` for red-emitting.
Comparison diagram 1 and Fig. 2, Fig. 2 is different from the light-source system part shown in Fig. 1 and is: change has occurred in the position of blue LD light source group 11` and red LD light source group 12`, makes the light-dividing device 25`, the first Multiplexing apparatus 18` that in subsequent optical path, arrange and the position of the second Multiplexing apparatus 20` that variation correspondingly occur.But the embodiment shown in Fig. 2 the change of essence does not occur aspect light path principle, does not affect the function that the embodiment shown in Fig. 2 realizes eliminate laser speckle with respect to the embodiment shown in Fig. 1 completely.
By the way, the light-source system for eliminate laser speckle that the utility model provides, utilize drive unit to drive loading plate to do near a light source group and then away from the periodicity translation of this light source group or for driving loading plate to do minor rotation around upper rotating shaft arranging of loading plate, so that the facula position of the light of same LD outgoing of adjacent time on same optical device changes, and then coordinate again the diffuser plate arranging on blue light and red transmission path, can eliminate laser speckle, and then can improve the image quality of Projection Display.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. for a light-source system for eliminate laser speckle, it is characterized in that, described light-source system comprises:
Blue LD light source group;
Red LD light source group;
Loading plate, be arranged between blue LD light source group and red LD light source group, in two relative face side of described loading plate, be respectively arranged with one group of catoptron, wherein, one group of catoptron is used for the blue light of reflection blue LD light source group outgoing, and another group catoptron is for the ruddiness of reflection Red LD light source group outgoing;
Drive unit, for drive loading plate on the path of advancing of the blue light of blue LD light source group transmitting, do first near and then away from the periodicity translation of blue LD light source group or for driving loading plate to do minor rotation around the rotating shaft arranging on one of loading plate, wherein, described rotating shaft is perpendicular to the emergent ray of LD, so that the facula position of the light of same LD outgoing of adjacent time on same optical device changes;
Light-dividing device, is arranged on the travel path of blue light, for transmit blue and for the new coloured light producing of reflected fluorescent light colour wheel;
Fluorescence colour wheel, is arranged on the travel path of blue light of light-dividing device transmission, comprises at least two regions that are fan annular along its central shaft, and first area is for transmit blue, and second area is green glow reflect green light for converting blue light;
The first Multiplexing apparatus, is arranged on the point of crossing of travel path of the new coloured light producing of fluorescence colour wheel of ruddiness and light-dividing device reflection, for the mode by transmit red light and the new coloured light producing of reflection, ruddiness and the new coloured light light path producing is merged;
The second Multiplexing apparatus, merges ruddiness, blue light and the new coloured light light path producing for the mode of other coloured light of transmission by reflect blue;
Optical filtering colour wheel, be arranged on the downstream travel path of the coloured light that the second Multiplexing apparatus merges, described optical filtering colour wheel comprises at least three filter areas that are fan annular along its central shaft, the first filter area only allows blue light to pass through, the second filter area only allows green glow to pass through, and the 3rd filter area only allows ruddiness to pass through;
Control device, while rotating along its central shaft for control fluorescence colour wheel according to the target light power of each coloured light, from the coloured light of fluorescence colour wheel outgoing and synchronization optical filtering colour wheel, allow the coloured light that passes through corresponding, simultaneously for controlling the duty of red LD light source group and blue LD light source group power supply;
Light collecting device, for collecting the sequential light through the different colours of optical filtering colour wheel transmission;
Wherein, on the travel path of described blue light and ruddiness, be respectively provided with diffusion sheet.
2. the light-source system for eliminate laser speckle according to claim 1, it is characterized in that, described fluorescence colour wheel further comprise along fluorescence colour wheel central shaft be fan annular spread for converting blue light, be the 3rd region of gold-tinted reflect yellow, at least three filter areas of optical filtering colour wheel further comprise the 4th filter area, and described the 4th filter area is for only allowing gold-tinted to pass through.
3. the light-source system for eliminate laser speckle according to claim 2, it is characterized in that, described fluorescence colour wheel further comprise along fluorescence colour wheel central shaft be fan annular spread for converting blue light, be green light the 4th region of reflecting green light, at least three regions of optical filtering colour wheel further comprise the 5th region, and described the 5th region is for only allowing green light to pass through.
4. the light-source system for eliminate laser speckle according to claim 1, is characterized in that, between described the second Multiplexing apparatus and optical filtering colour wheel, is provided with optoisolator.
5. the light-source system for eliminate laser speckle according to claim 1, is characterized in that, it is that micron is to centimetre magnitude that described drive unit drives the amplitude of loading plate translation.
6. the light-source system for eliminate laser speckle according to claim 1, is characterized in that, the driving frequency of described drive unit is greater than 20HZ.
7. the light-source system for eliminate laser speckle according to claim 6, is characterized in that, the driving frequency of described drive unit is n times of optical filtering colour wheel rotational frequency, and wherein, n is natural number.
8. the light-source system for eliminate laser speckle according to claim 7, is characterized in that n=1.
9. the light-source system for eliminate laser speckle according to claim 1, it is characterized in that, the minute surface of each catoptron in one group of catoptron on described loading plate is different with the angle of loading plate, and the minute surface of each catoptron and the angle of loading plate in another group catoptron on described loading plate are also different.
10. the light-source system for eliminate laser speckle according to claim 1, it is characterized in that, the minute surface of each catoptron in one group of catoptron on described loading plate is identical with the angle of loading plate, and the minute surface of each catoptron in another group catoptron on described loading plate is identical with the angle of loading plate.
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Owner name: SHENZHEN YISIDA TECHNOLOGY GROUP CO., LTD. Free format text: FORMER NAME: SHENZHEN ESTA DISPLAY TECHNOLOGY CO., LTD. |
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Address after: 518000 Shenzhen, Nanshan District, China Hi Tech in the world, the world's 806 digital building, room three Patentee after: SHENZHEN ESTAR DISPLAYTECH CO., LTD. Address before: 518000, District, Shenzhen, Nanshan District high tech Zone, Southern District, B1 digital technology park, building 2, C Patentee before: Shenzhen Esta Display Technology Co., Ltd. |
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