CN103051195A - Power supply circuit and liquid crystal television - Google Patents
Power supply circuit and liquid crystal television Download PDFInfo
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- CN103051195A CN103051195A CN2013100066216A CN201310006621A CN103051195A CN 103051195 A CN103051195 A CN 103051195A CN 2013100066216 A CN2013100066216 A CN 2013100066216A CN 201310006621 A CN201310006621 A CN 201310006621A CN 103051195 A CN103051195 A CN 103051195A
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- 239000004973 liquid crystal related substance Substances 0.000 title abstract 2
- 230000005669 field effect Effects 0.000 claims description 48
- 238000004804 winding Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a power supply circuit. The power supply circuit comprises a resonance control circuit, an isolation driving circuit, a first output circuit and a second output circuit, wherein the resonance control circuit receives first direct current from exterior and a driving signal from the isolation driving circuit, and respectively outputs second current to the first output circuit and the second output circuit according to the driving signal and the first direct current; and the isolation driving circuit is connected to the resonance control circuit and is used for outputting the driving signal to the resonance control circuit. The invention also provides a liquid crystal television. According to a technical scheme of the invention, a high-power LED (light-emitting diode) backlight source is driven by using a secondary circuit to control a primary resonance circuit, and the power supply for a main board is , controlled and integrated through the feedback of a double loop.
Description
Technical field
The present invention relates to the Display Technique field, in particular to power supply circuits with have a LCD TV of these power supply circuits.
Background technology
LED is as the backlight of LCD TV, in large-sized LCD TV have two-way even more lamp bars at least.The power drives mode is that No. one booster circuit drives a paths of LEDs lamp bar, realizes that by the electric current of every street lamp bar of taking a sample each street lamp bar electric current equates, to satisfy the television image display requirement.Multi-path lamp strip is generally low pressure 24V input, adopts this kind mode generally need to be than multi-chip and peripheral component, and cost is higher.Therefore, increasing the quantity of every street lamp bar LED lamp, reduce lamp bar quantity, is the trend of current LED LCD TV backlight.
Current, 42 cun, 46 cun LED LCD TV have two-way or Multi-path lamp strip more, and the construction for electricity of employing and type of drive are shown in Figure 1A and Figure 1B.
Figure 1A is the Power supply part, is made of PFC power supply 106, half-bridge resonance control chip 102, the control of LLC resonance and energy transfer circuit 104, produces the Voltage-output of 12V and 100V by switch transformer T1, in order to give secondary power supply.This Power supply partly needs half-bridge resonance control chip 102 and peripheral circuit thereof, and device is more.
Figure 1B is driving circuit section, with driving chip 110 controls, has only shown a two-way that drives chip 110 controls among Figure 1B, and four street lamp bars or Multi-path lamp strip are with the identical lamp number of same drive control circuit.The topological mode that every street lamp bar all uses Boost booster circuit 108 to boost, this Boost booster circuit 108 needs the metal-oxide-semiconductor that boosts (V3 or V5) and a light modulation metal-oxide-semiconductor (V4 or V6), and the output of every road all needs electrochemical capacitor (C5 or C6) to satisfy the LED normal operation.Therefore, this driving circuit section needs special driving chip to cooperate Boost topology peripheral circuit, and device is more.
Therefore, need a kind of power supply circuits of simplification, reduce the setting of components and parts, and then reduce production costs.
Summary of the invention
Consider the above-mentioned background technology, goal of the invention of the present invention provides a kind of power supply circuits, can simplify circuit framework, reduces production costs.
In view of this, according to an aspect of the present invention, a kind of power supply circuits are provided, comprise: resonant control circuit, isolated drive circuit, the first output circuit and the second output circuit, wherein, described resonant control circuit receives from the first direct current of outside with from the driving signal of described isolated drive circuit, exports the second direct current to described the first output circuit and described the second output circuit respectively according to described driving signal and described the first direct current; Described isolated drive circuit is connected to described resonant control circuit, is used for exporting described driving signal to described resonant control circuit.
Owing to utilizing secondary circuit to drive the elementary LLC resonant control circuit of control, then directly give the first load supplying by the first output circuit, and by the double loop design integration drive circuit of the second load (being driven by the second output circuit), add marginal BOOST driving chip by original former limit LLC driving chip and replace with directly driving the first load of an isolated drive circuit control LLC, simplify original Circuits System, reduced production cost.
According to a further aspect in the invention, provide a kind of LCD TV, comprised the power supply circuits described in above-mentioned technical scheme.This LCD TV has the technique effect identical with above-mentioned power supply circuits, can integrate main board power supply and backlight driver.
Description of drawings
Figure 1A shows the schematic diagram of the power supply circuits part of power supply circuits in the correlation technique;
Figure 1B shows the schematic diagram of the driving circuit section of power supply circuits in the correlation technique;
Fig. 2 shows the according to an embodiment of the invention block diagram of power supply circuits;
Fig. 3 shows the according to an embodiment of the invention schematic diagram of power supply circuits;
Fig. 4 shows the according to an embodiment of the invention schematic diagram of commutation circuit;
Fig. 5 shows the according to an embodiment of the invention schematic diagram of commutation circuit;
Fig. 6 shows the according to an embodiment of the invention work wave schematic diagram of two control loops of LED-backlit source under no-load condition;
Fig. 7 shows the according to an embodiment of the invention work wave schematic diagram of two control loops of LED-backlit source under working condition;
Fig. 8 to Figure 10 shows the according to an embodiment of the invention oscillogram of each parameter under non-dimming state;
Figure 11 to Figure 13 shows the according to an embodiment of the invention oscillogram of each parameter under dimming state.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments the present invention is further described in detail.Need to prove, in the situation that do not conflict, the application's embodiment and the feature among the embodiment can make up mutually.
Set forth in the following description a lot of details so that fully understand the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.
Fig. 2 shows the according to an embodiment of the invention block diagram of power supply circuits.
As shown in Figure 2, power supply circuits 200 comprise according to an embodiment of the invention: resonant control circuit 204, isolated drive circuit 206, the first output circuit 208 and the second output circuit 210, wherein, resonant control circuit 204 receives from first direct current of outside (for example current rectifying and wave filtering circuit among Fig. 2) with from the driving signal of isolated drive circuit 206, according to driving signal and described the first direct current respectively to the first output circuit 208 and the second output circuit 210 outputs the second direct current; Isolated drive circuit 206 is connected to resonant control circuit 204, is used for to the described driving signal of resonant control circuit 204 outputs.
Owing to utilizing secondary circuit to drive the elementary LLC resonant control circuit of control, then directly give the first load supplying by the first output circuit, and by the double loop design integration power supply circuits of the second load, add marginal BOOST driving chip by original former limit LLC driving chip and replace with directly driving the first load of an isolated drive circuit control LLC, simplify original Circuits System, reduced production cost.
Then with reference to figure 3, Fig. 3 shows the schematic diagram of detailed power supply circuits, as we know from the figure, resonant control circuit 204 roughly can comprise the first field-effect transistor Q1, the second field-effect transistor Q2, the first transformer T2, resonant capacitance Cr, the first rectification unit 2042 and the second rectification unit 2044, wherein, the grid of the first field-effect transistor Q1 and the second field-effect transistor Q2 all is connected to the output of isolated drive circuit 206, the drain electrode of the first field-effect transistor Q1 is connected to outside output, in the present embodiment, the direct current of this outside output is the direct current through power factor correction of current rectifying and wave filtering circuit output.
The drain electrode of the second field-effect transistor Q2 is connected to the source electrode of the first field-effect transistor Q1, the source ground of the second field-effect transistor Q2; One end of the former limit winding of the first transformer T2 is connected to the node between the drain electrode of the source electrode of the first field-effect transistor Q1 and the second field-effect transistor Q2, the secondary winding of the first transformer T2 comprises the first coil and the second coil, the first coil is connected to the first output circuit 208, the second coils by the first rectification unit 2042 and is connected to the second output circuit 210 by the second rectification unit 2044; The source electrode common ground of the end of resonant capacitance Cr and the second field-effect transistor Q2, the other end of resonant capacitance Cr is connected to the other end of the former limit winding of the first transformer T2, by controlling the alternate conduction of the first field-effect transistor Q1 and the second field-effect transistor Q2, make magnetizing inductance, the resonant inductance of resonant capacitance Cr and the first transformer T2 produce resonance, energy is delivered to secondary by transformer.
The electric current that inferior limit induces enters the first output circuit 208 by the first rectification unit 2042; and enter the second output circuit 210 by the second rectification unit 2044; like this; can take full advantage of the energy that induces; be discharged in the load; and what obtain all is malleation, is convenient to the detection of electric current and the protection of circuit.
Isolated drive circuit 206 roughly comprises the second transformer T1 and controller IC 1, wherein, the former limit winding of the second transformer T1 is connected to controller IC 1, the secondary winding of the second transformer T1 comprises tertiary coil and the 4th coil, one end of tertiary coil and an end of the 4th coil are connected to respectively the grid of the first field-effect transistor Q1 and the second field-effect transistor Q2, and the other end of the other end of tertiary coil and the 4th coil is connected to respectively the source electrode of the first field-effect transistor Q1 and the second field-effect transistor Q2; Controller IC 1 is to the former limit winding output drive signal of the second transformer T1, and the second transformer T1 adjusts the driving signal frequency of the first field-effect transistor Q1 and the second field-effect transistor Q2 according to the driving signal.
This shows, the present invention utilizes secondary circuit control primary resonant circuit directly to the second load supplying, add marginal BOOST driving chip by original former limit LLC driving chip and replace with controller by directly driving the second load of transformer coupled control LLC, drive circuit is carried out simplified design, reduced production cost; Simultaneously, owing to only having one-level LLC circuit (resonant control circuit 204), greatly promoted the conversion efficiency of whole circuit.
As seen from Figure 3, resonant control circuit 204 also comprises balancing capacitance Cb, be connected between the second coil and the second rectification unit 2044 of the first transformer T2, when the second output circuit 210 is exported at least two-way the second direct current to the second load, make this at least equal and opposite in direction of two-way the second direct current.
In schematic diagram shown in Figure 3, the second output circuit 210 has been exported two-way the second direct current, and at this, those skilled in the art should be understood that and can also export more multichannel the second direct current or one tunnel second direct current.
And for example shown in Figure 2, for further stable power-supplying voltage, these power supply circuits can also comprise: the first detecting unit 214 and the second detecting unit 212, the first detecting unit 214 is connected to the first output circuit 208, detect the first voltage of the first output circuit 208 and with the first voltage transmission to controller IC 1, the second detecting unit 212 is connected to the negative terminal of the load of the second output circuit 210, detects the second voltage of negative terminal and described second voltage is transferred to described controller IC 1; Described controller IC 1 adjusts the output to the driving signal of the second transformer T1 according to described the first voltage and described second voltage.In the embodiment shown in fig. 3, the first detecting unit 214 comprises resistance R VL, and the second detecting unit 212 comprises resistance R sense.
As shown in Figure 4, owing to having integrated two kinds of load supplyings, therefore has dual control loop processed (LED current controlled circuit and voltage control loop), in order to coordinate this dual control loop processed, utilize commutation circuit in the controller IC 1 to coordinate to control the work of dual control loop processed, its leading role of voltage signal of the second output circuit 210 that the IFB signal namely gathers is finally determined frequency and the output drive signal on this basis of control according to two loops, realize the normal operation of two loads.
Commutation circuit receives the first detecting unit 214 detected the first voltages and the second detecting unit 212 detected second voltages, and during less than threshold voltage, commutation circuit is the first voltage and reference voltage output drive signal relatively at second voltage; At second voltage during more than or equal to threshold voltage, the size of the first voltage and second voltage relatively is according to the comparative result output drive signal.
Concrete, as shown in Figure 5, commutation circuit 500 in the controller IC 1 comprises the 3rd field-effect transistor 502 and comparator 504, wherein, the grid of the 3rd field-effect transistor 502 receives second voltage, the drain electrode of the 3rd field-effect transistor 502 is connected to the voltage sampling inverting input of comparator 504, and the source electrode of the 3rd field-effect transistor 502 is connected to the voltage sampling in-phase input end of comparator 504; The voltage sampling in-phase input end of comparator 504 is connected to the 3rd field-effect transistor 502 and reference signal source, and the voltage sampling inverting input of comparator 504 receives described the first voltage, and the output of comparator 504 is connected to the second transformer T1.
According to LCD TV of the present invention, comprise the power supply circuits among arbitrary embodiment described above.The first output circuit 208 in the power supply circuits can be connected to the mainboard of LCD TV, is main board power supply, and the second output circuit 210 in the power supply circuits can be connected to the LED-backlit source of LCD TV, is the power supply of LED-backlit source.This LCD TV has the technique effect identical with above-mentioned power supply circuits, can integrate main board power supply and backlight driver.
Below with reference to Fig. 6 to Figure 13 double loop control effect of the present invention is described.In Fig. 6, the LED-backlit source occurs unloaded, does not namely work, and in Fig. 7, the LED-backlit source is normally shinny.4 is the work wave in LED-backlit source, and 2 are the ideal operation waveform of mainboard (desirable supply power voltage is 12V), and 3 is the real work waveform of mainboard.Comparison diagram 6 and Fig. 7 can find when the zero load of LED-backlit source the electrifying condition of capable of regulating mainboard.In Fig. 8 to Figure 10,6 is the current waveform in LED-backlit source, and 5 is the voltage waveform of mainboard, and comparison diagram 8, Fig. 9 and Figure 10 can find, the LED-backlit source is under non-dimming state, and the voltage of mainboard is substantially constant.In Figure 11 to Figure 13,7 is the current waveform in LED-backlit source, 8 is the voltage waveform of mainboard, Figure 11 to Figure 13 has shown respectively the current waveform (duty ratio is adjusted to 10% from 90%) of regulating successively the LED-backlit source, but significant change does not occur in the voltage waveform of mainboard, therefore the LED-backlit source is under dimming state, and the voltage of mainboard is substantially constant.To sum up, can realize the constant voltage power supply of mainboard and the constant current-supplying in LED-backlit source according to power supply circuits of the present invention.
Should be understood that above-mentioned power supply circuits also can be applicable to other electronic equipments, for example refrigerator, air-conditioning and computing equipment.
More than be described with reference to the accompanying drawings according to technical scheme of the present invention, utilize secondary circuit to control the driving that elementary LLC circuit is realized big power LED backlight source, and integrated main board power supply by double loop feedback control, realized simultaneously main board power supply and backlight drive.
Owing to utilizing secondary circuit to drive the elementary LLC resonant circuit of control then directly to the power supply of lamp bar, and by the double loop design integration main board power supply, original former limit LLC driving chip is added marginal BOOST driving chip replace with a controller chip by the direct driving LED lamp of transformer coupled control LLC bar, and by the double loop design integration main board power supply, therefore simplify original Circuits System, thereby reduced cost.Simultaneously, owing to only having one-level LLC circuit, greatly promote the conversion efficiency of whole circuit, reduced electromagnetic interference (EMI, Electro Magnetic Interference).
In the present invention, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.Term " a plurality of " refers to two or more, unless clear and definite restriction is arranged in addition.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. power supply circuits is characterized in that, comprising: resonant control circuit, isolated drive circuit, the first output circuit and the second output circuit, wherein,
Described resonant control circuit receives from the first direct current of outside with from the driving signal of described isolated drive circuit, exports the second direct current to described the first output circuit and described the second output circuit respectively according to described driving signal and described the first direct current;
Described isolated drive circuit is connected to described resonant control circuit, is used for exporting described driving signal to described resonant control circuit.
2. power supply circuits according to claim 1 is characterized in that, described resonant control circuit comprises the first field-effect transistor, the second field-effect transistor, the first transformer, resonant capacitance, the first rectification unit and the second rectification unit, wherein,
The grid of described the first field-effect transistor and described the second field-effect transistor all is connected to the output of described isolated drive circuit, the drain electrode of described the first field-effect transistor is connected to the output of described outside, the drain electrode of described the second field-effect transistor is connected to the source electrode of described the first field-effect transistor, the source ground of described the second field-effect transistor;
One end of the former limit winding of described the first transformer is connected to the node between the drain electrode of the source electrode of described the first field-effect transistor and described the second field-effect transistor, the secondary winding of described the first transformer comprises the first coil and the second coil, described the first coil is connected to described the first output circuit by the first rectification unit, and described the second coil is connected to described the second output circuit by the second rectification unit;
One end of described resonant capacitance and the source electrode common ground of described the second field-effect transistor, the other end of described resonant capacitance is connected to the other end of the former limit winding of described the first transformer, by controlling the alternate conduction of described the first field-effect transistor and described the second field-effect transistor, make the magnetizing inductance of described resonant capacitance and described the first transformer, resonant inductance produce resonance.
3. power supply circuits according to claim 2 is characterized in that, described isolated drive circuit comprises the second transformer and controller, wherein,
The former limit winding of described the second transformer is connected to described controller, the secondary winding of described the second transformer comprises tertiary coil and the 4th coil, one end of described tertiary coil and an end of described the 4th coil are connected to respectively the grid of described the first field-effect transistor and described the second field-effect transistor, and the other end of the other end of described tertiary coil and described the 4th coil is connected to respectively the source electrode of described the first field-effect transistor and described the second field-effect transistor;
Described controller is exported described driving signal to the former limit winding of described the second transformer, and described the second transformer is adjusted the driving signal frequency of described the first field-effect transistor and described the second field-effect transistor according to described driving signal.
4. power supply circuits according to claim 3, it is characterized in that, also comprise: the first detecting unit and the second detecting unit, described the first detecting unit is connected to described the first output circuit, detect described the first output circuit the first voltage and will described the first voltage transmission described controller extremely, described the second detecting unit is connected to the negative terminal of the load of described the second output circuit, detects the second voltage of described negative terminal and described second voltage is transferred to described controller;
Described controller adjusts the output to the driving signal of described the second transformer according to described the first voltage and described second voltage.
5. power supply circuits according to claim 3 is characterized in that, described the first detecting unit and the second detecting unit include resistance.
6. power supply circuits according to claim 4, it is characterized in that, described controller comprises commutation circuit, receive described the first voltage and described second voltage, at described second voltage during less than threshold voltage, more described the first voltage of described commutation circuit and reference voltage are exported described driving signal, during more than or equal to described threshold voltage, export described driving signal according to described the first voltage and described second voltage at described second voltage.
7. power supply circuits according to claim 6, it is characterized in that, described commutation circuit comprises the 3rd field-effect transistor and comparator, wherein, the grid of described the 3rd field-effect transistor receives described second voltage, the drain electrode of described the 3rd field-effect transistor is connected to the voltage sampling inverting input of described comparator, and the source electrode of described the 3rd field-effect transistor is connected to the voltage sampling in-phase input end of described comparator;
The voltage sampling in-phase input end of described comparator is connected to described the 3rd field-effect transistor and reference signal source, and the voltage sampling inverting input of described comparator receives described the first voltage, and the output of described comparator is connected to described the second transformer.
8. each described power supply circuits in 7 according to claim 2, it is characterized in that, described resonant control circuit also comprises balancing capacitance, be connected between second coil and described the second rectification unit of described the first transformer, when described the second output circuit exports that two-way the second direct current is to load at least, make the equal and opposite in direction of described at least two-way the second direct current.
9. a LCD TV is characterized in that, comprises such as each described power supply circuits in the claim 1 to 8.
10. LCD TV according to claim 9, it is characterized in that, the first output circuit in the described power supply circuits is connected to the mainboard of described LCD TV, be described main board power supply, the second output circuit in the described power supply circuits is connected to the LED-backlit source of described LCD TV, is the power supply of described LED-backlit source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310006621.6A CN103051195B (en) | 2012-11-19 | 2013-01-09 | Power supply circuits and LCD TV |
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| CN201210479993 | 2012-11-19 | ||
| CN201210479993.6 | 2012-11-19 | ||
| CN2012104799936 | 2012-11-19 | ||
| CN201310006621.6A CN103051195B (en) | 2012-11-19 | 2013-01-09 | Power supply circuits and LCD TV |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490634A (en) * | 2013-09-22 | 2014-01-01 | 青岛海信电器股份有限公司 | Power supply circuit and liquid crystal television |
| CN103560673A (en) * | 2013-11-15 | 2014-02-05 | 青岛海信电器股份有限公司 | Power supply circuit and liquid crystal display television |
| WO2016026090A1 (en) * | 2014-08-19 | 2016-02-25 | Abbeydorney Holdings Ltd. | Driving circuit, lighting device and method of reducing power dissipation |
| CN107086026A (en) * | 2017-04-28 | 2017-08-22 | 康佳集团股份有限公司 | A kind of constant-current circuit and television set of driving LED backlight |
| CN109935214A (en) * | 2019-04-24 | 2019-06-25 | 合肥惠科金扬科技有限公司 | A kind of backlight drive circuit and backlight drive device |
| WO2022056781A1 (en) * | 2020-09-17 | 2022-03-24 | 广州视源电子科技股份有限公司 | Dimming apparatus and electronic device |
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| CN202514139U (en) * | 2012-04-09 | 2012-10-31 | 青岛海信电器股份有限公司 | Backlight driving circuit and liquid crystal display |
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| CN201984790U (en) * | 2011-04-20 | 2011-09-21 | 青岛海信电器股份有限公司 | Drive circuit and LCD TV |
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| CN103490634A (en) * | 2013-09-22 | 2014-01-01 | 青岛海信电器股份有限公司 | Power supply circuit and liquid crystal television |
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| CN107086026B (en) * | 2017-04-28 | 2019-11-08 | 康佳集团股份有限公司 | A kind of constant-current circuit and television set driving LED backlight |
| CN109935214A (en) * | 2019-04-24 | 2019-06-25 | 合肥惠科金扬科技有限公司 | A kind of backlight drive circuit and backlight drive device |
| CN109935214B (en) * | 2019-04-24 | 2023-10-20 | 合肥惠科金扬科技有限公司 | Backlight driving circuit and backlight driving device |
| WO2022056781A1 (en) * | 2020-09-17 | 2022-03-24 | 广州视源电子科技股份有限公司 | Dimming apparatus and electronic device |
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| CN103051195B (en) | 2015-08-26 |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |