CN101350173B - Backlight driving system for liquid crystal display - Google Patents
Backlight driving system for liquid crystal display Download PDFInfo
- Publication number
- CN101350173B CN101350173B CN2008100857137A CN200810085713A CN101350173B CN 101350173 B CN101350173 B CN 101350173B CN 2008100857137 A CN2008100857137 A CN 2008100857137A CN 200810085713 A CN200810085713 A CN 200810085713A CN 101350173 B CN101350173 B CN 101350173B
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- Prior art keywords
- power
- lamp
- transformer
- switch
- advance
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
-
- 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
Abstract
There is provided a backlight driving system for a liquid crystal display that can reduce size and weight of a product because a DC-DC converter is not used when commercial AC power is converted into lamp driving power. A backlight driving system for a liquid crystal display according to an aspect of the invention includes a power supply unit converting commercial alternating current (AC) power into direct current (DC) power having a voltage level set beforehand, an inverter unit converting the DC power from the power supply unit into AC power at a one-to-one conversion ratio set beforehand, a boosting unit boosting the AC power from the inverter unit into lamp lighting power set beforehand; and a lamp group receiving the lamp lighting power from the boosting unit to emit light.
Description
The cross reference of related application
The application requires the 2007-72605 korean patent application submitted on July 20th, 2007 in Korea S Department of Intellectual Property and the right of priority of the 2007-120917 korean patent application submitted on November 26th, 2007, and its full content is hereby expressly incorporated by reference.
Technical field
The present invention relates to a kind of backlight liquid crystal display drive system that is used for, more specifically, relate to a kind of can reduce the size of product and weight owing to when the commercial AC power transfer is the lamp driving power, do not use the DC-DC converter be used for the backlight liquid crystal display drive system.
Background technology
In recent years, LCD is widely used in the various display device such as monitor and televisor, so that little, light, thin LCD product to be provided.
These LCD products use the LCD backlight driving system inevitably, and it makes the lamp of LCD luminous and export required light.
Fig. 1 is the configuration view that illustrates according to the backlight driving system of correlation technique.
With reference to figure 1, comprise converter 11, DC-DC converter 12, inverter unit 13 and a plurality of lamp 14 of alternating current (AC) to direct current (DC) according to the backlight driving system 10 of correlation technique.AC to DC converter 11 is the DC power of DC 400V with the commercial AC power transfer.DC to DC converter 12 will be converted to DC 24V from the DC 400V of AC to DC converter 11.Inverter unit 13 will be converted to the lamp lighting power (lamp lightingpower) of about AC 2700vp-p from the DC 24V of DC-DC converter 12.A plurality of lamps 14 come luminous according to the lamp lighting power from inverter unit 13.
Is lamp lighting power with the order of AC-DC-DC-AC with the commercial AC power transfer according to the above-mentioned backlight driving system 10 of correlation technique, and this has reduced power conversion efficiency and the power transfer structure is complicated.
Summary of the invention
One aspect of the present invention provides a kind of backlight liquid crystal display drive system that is used for, and it can reduce the size and the weight of product owing to do not use the DC-DC converter when the commercial AC power transfer is the lamp driving power.
According to an aspect of the present invention, provide a kind of backlight liquid crystal display drive system that is used for, this system comprises: power supply unit, and it is direct current (DC) power with the voltage level that sets in advance that commercialization is exchanged (AC) power transfer; Inverter unit will be AC power from the DC power transfer of power supply unit with the man-to-man conversion ratio that sets in advance; Promoting (boosting) unit, will be the lamp lighting power that sets in advance from the AC power ascension of inverter unit; The lamp group, the lamp lighting power that receives from lift unit comes luminous; And has first plate (board) of the installation region that sets in advance and with the first plate physical separation and have second plate of the installation region that sets in advance, wherein, power supply unit and inverter unit are mounted to first plate, and lift unit is mounted to second plate.
Power supply unit can comprise the electromagnetic interference (EMI) suppression filter of the electromagnetic interference (EMI) of eliminating commercial AC power, AC power by the EMI suppression filter is carried out the rectifier of level and smooth and rectification, and be DC power factor of power corrector with the power transfer after will proofreading and correct to carry out power factor correction through the AC of rectifier rectification power, inverter unit can comprise the switch (switch) that the power of being proofreaied and correct by power factor corrector is switched, and be the transformer one to one with AC power of the voltage level identical with the voltage level of DC power according to the power transfer that the identical ratio of winding that sets in advance (winding ratio) will be switched through switch, and lift unit can comprise that according to the ratio of winding that sets in advance will be lamp lighting power and the substation transformer (distribution transformer) of the lamp lighting power being distributed to lamp from the AC power ascension of transformer one to one.
One to one transformer can be by cable with the AC power delivery to substation transformer.
Substation transformer can be the one-to-many substation transformer that the lamp lighting power is transferred to the substation transformer one to one of a lamp or the lamp lighting power is transferred at least two lamps.
The switch of inverter can be by using full-bridge method, half-bridge method and recommending in the method any one and carry out blocked operation.
First plate can comprise elementary grounding parts with the ground area that sets in advance and the secondary grounding parts with the ground area of separating with the ground area of elementary grounding parts, and EMI suppression filter, rectifier, power factor corrector, switch and one to one the primary side of transformer can be grounded to elementary grounding parts, and the primary side of transformer can be grounded to secondary grounding parts one to one.
The lamp group can comprise at least one external electrode fluorescent lamp, and the lamp lighting power that this external electrode fluorescent lamp can receive from lift unit comes luminous.
Description of drawings
By detailed description below in conjunction with accompanying drawing, will be expressly understood above-mentioned and other aspects, feature and other advantages of the present invention more, wherein:
Fig. 1 is the configuration view that illustrates according to the backlight driving system of correlation technique.
Fig. 2 illustrates the configuration view of backlight driving system according to an exemplary embodiment of the present invention.
Fig. 3 is the view that employed lift unit in the backlight driving system according to an exemplary embodiment of the present invention is shown.
Fig. 4 is the configuration view that the backlight driving system of another exemplary embodiment according to the present invention is shown.
Fig. 5 is the view of employed lift unit in the backlight driving system of another exemplary embodiment according to the present invention.
Fig. 6 A is the view that employed external electrode fluorescent lamp in the backlight driving system of another exemplary embodiment according to the present invention is shown.
Fig. 6 B is the chart that the positive impedance characteristic of external electrode fluorescent lamp is shown.
Fig. 6 C is the chart that the negative resistance character of cold-cathode fluorescence lamp is shown.
Fig. 7 is the chart of the deviation of the electric current in the lamp that illustrates in the backlight driving system according to an exemplary embodiment of the present invention.
Embodiment
Describe exemplary embodiment of the present invention in detail referring now to accompanying drawing.
Fig. 2 illustrates the configuration view of backlight driving system according to an exemplary embodiment of the present invention.
With reference to figure 2, backlight driving system 100 comprises power supply unit 110, inverter unit 120 and lift unit 130 according to an exemplary embodiment of the present invention.
Transformer 122 can be divided into the primary side of primary side with coil that the number of windings the sets in advance coil identical with the number of windings of the coil at primary side place with having the number of windings one to one.
Simultaneously, the first plate B1 can comprise elementary grounding parts with the ground area that sets in advance and the secondary grounding parts with ground area different with the ground area of elementary grounding parts.EMI suppression filter 111, rectifier 112, power factor corrector 113, switch 121 and one to one the primary side of transformer 122 can be grounded to elementary grounding parts, and the primary side of transformer 122 can be grounded to secondary grounding parts one to one.
Because the first plate B1 and the second plate B2 be physical separation each other, thus the transformer one to one 122 of inverter unit 120 by cable C with the AC power delivery to lift unit 130.Because AC power has the voltage level of about 400Vp-p, so the cable that is used for low-voltage is to reduce cost.
Fig. 3 is the view that employed lift unit in the backlight driving system according to an exemplary embodiment of the present invention is shown.
With reference to figure 3, employed lift unit 130 can comprise substation transformer 131 in the backlight driving system 100 according to the embodiment of the invention.Substation transformer 131 promote AC power by cable C with the power division after will promoting to the lamp among the lamp group L.
At this moment, substation transformer 131 can comprise primary coil and at least one secondary coil.Primary coil has the number of windings that sets in advance and receives AC power.Secondary coil has the number of windings of Duoing than the number of windings of primary coil, to promote from the AC power of primary coil and the AC power transfer after will promoting is the lamp lighting power.
In addition, as shown in Figure 3, substation transformer 131 can be a pair of four substation transformers that comprise a primary coil and two secondary coils, and is connected to four lamps among the lamp group L the lamp lighting power is transferred to this four lamps.
In addition, substation transformer 131 can be formed by in the various substation transformers any one, for example, have a primary coil and four secondary coils with a pair of eight substation transformers that the lamp lighting power transferred to eight lamps and have a primary coil and eight secondary coils the lamp lighting power is transferred to a pair of 16 substation transformers of 16 lamps.
As mentioned above, in backlight driving system 100 according to an exemplary embodiment of the present invention, power supply unit 110 and inverter unit 120 are mounted to the first plate B1, and lift unit 130 is mounted to the second plate B2.That is, the lamp lighting power that will have the high-voltage level of the about 2700Vp-p lift unit 130 that exports lamp to use the commercial AC power with relative low voltage level and the power supply unit 110 and inverter unit 120 physical separation of DC power.Therefore, power supply unit 110 and inverter unit 120 are not subjected to the influence of the electromagnetic interference (EMI) that produced in the lift unit 130.In addition, owing to use the volume of the volume of employed assembly in the high-tension lift unit 130, so power supply unit 110 is mounted to different plates to reduce product size with inverter unit 120 and lift unit 130 greater than employed assembly in power supply unit 110 that uses low-voltage and the inverter unit 120.
In addition, employed transformer one to one 122 produces the AC power that has with from the 400Vp-p of the identical voltage level of the voltage level of the DC power of the 400V of power supply unit 110 in the inverter unit 120.That is, transformer 122 uses low-voltage power to reduce safe distance one to one, thereby can reduce the volume of transformer.
Fig. 4 is the configuration view that the backlight driving system of another exemplary embodiment according to the present invention is shown.
With reference to figure 4, the backlight driving system 200 of another exemplary embodiment comprises power supply unit 210, inverter unit 220 and the lift unit 230 that is similar to configuration shown in Figure 2 according to the present invention.
Because except the fact of the technology not using stube cable and a plurality of plates are separated, power supply unit 210 shown in Figure 4, inverter unit 220 and lift unit 230 are identical with shown in Figure 2 those, so will omit its detailed description.
Fig. 5 is the view that employed lift unit in the backlight driving system of another exemplary embodiment according to the present invention is shown.
With reference to figure 5, employed lift unit 230 can comprise substation transformer 231 in the backlight driving system 200 of another exemplary embodiment according to the present invention.231 pairs of AC power of substation transformer promote with the lamp of the power delivery after will promoting to the lamp group 240.
In addition, as shown in Figure 5, substation transformer 231 can be a pair of four substation transformers with a primary coil and two secondary coils.Here, each end of each secondary coil is connected to four external electrode fluorescent lamps 241,242,243 and 244 of lamp group 240 respectively, the lamp lighting power is transferred to this four lamps.
In addition, substation transformer 231 can be formed by in the various substation transformers any one, for example, have a primary coil and four secondary coils with a pair of eight substation transformers that the lamp lighting power transferred to eight lamps and have a primary coil and eight secondary coils the lamp lighting power is transferred to a pair of 16 substation transformers of 16 lamps.
In addition, because the backlight driving system 200 of another exemplary embodiment uses external electrode fluorescent lamps according to the present invention, so can remove the current balance circuit (current balancing circuit) that when using cold-cathode fluorescence lamp, must use to reduce circuit area and manufacturing cost.
The technology of holding current balance when using external electrode fluorescent lamp is described below with reference to the accompanying drawings.
Fig. 6 A is the view that the external electrode fluorescent lamp that uses in the backlight driving system according to an exemplary embodiment of the present invention is shown.Fig. 6 B is the chart that the positive impedance characteristic of external electrode fluorescent lamp is shown.
With reference to figure 6A, external electrode fluorescent lamp comprises fluorophor (phosphor) and the discharge gas (discharge gas) in the rod glass tube.Outer electrode is formed on two ends of glass tube.
This can represent as equivalent electrical circuit by utilizing resistor R and the capacitor C1 and the C2 that are formed on the resistor R two ends.That is, substantially, current balance circuit is made of resistor and capacitor.As mentioned above, outer electrode can analyzed as being and capacitor C1 and C2 equivalence, does not need current balance circuit separately.Although not shown in Fig. 6 A, can use planar light source (flat light source) with outer electrode.
In addition, with reference to figure 6B, externally in the electrode fluorescence lamp, pipe presses (tube voltage) and tube current (tube current) to be proportional to one another.Because external electrode fluorescent lamp has the positive impedance characteristic, so be similar to the cold-cathode fluorescence lamp with the negative resistance character shown in Fig. 6 C, does not need independent current balance circuit.
Fig. 7 is the chart that the deviation of the electric current in the lamp of backlight driving system according to an exemplary embodiment of the present invention is shown.
With reference to figure 7, in backlight driving system 100 and 200 according to an exemplary embodiment of the present invention, when the lamp lighting power was transferred to about 12 lamps, root mean square (RMS) value of this lamp lighting power that is transferred to each lamp was in the scope of 7.5mA to 8mA.That is, as can be seen, come the holding current balance based on the current value of the lamp lighting power that offers each lamp.
As mentioned above, according to exemplary embodiment of the present invention,, can reduce the size and the weight of product and can significantly reduce material cost owing to when the commercial AC power transfer is the lamp driving power, do not use the DC-DC converter.In addition, owing in inverter unit, used inverter one to one,, therefore reduced electromagnetic interference (EMI) so high voltage transformer is transformed to the low-voltage transformer.In addition, can reduce extra material cost owing to be replaced by the low-voltage transformer.In addition, standardization and public purpose can be applied to all sizes is the LCD of unit with the inch, and can reduce product size more.
In addition, owing to used external electrode fluorescent lamp (EEFL) to substitute cold-cathode fluorescence lamp (CCFL), and therefore can remove current balance circuit, so can further reduce manufacturing cost and product size.In addition, owing to can use flat florescent lamp (FFL) come to substitute cold-cathode fluorescence lamp (CCFL), therefore can obtain effect identical when using external electrode fluorescent lamp (EEFL) according to correlation technique with outer electrode.
Although illustrate and described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that under the situation of the spirit and scope of the present invention that do not deviate from the claims qualification, can carry out various improvement and variation.
Claims (10)
1. one kind is used for the backlight liquid crystal display drive system, and described system comprises:
Power supply unit, it is direct current (DC) power with the voltage level that sets in advance that commercialization is exchanged (AC) power transfer;
Inverter unit will be converted to AC power from the described DC power of described power supply unit with the man-to-man conversion ratio that sets in advance;
Lift unit will promote the lamp lighting power for setting in advance from the described AC power of described inverter unit;
The lamp group, the described lamp lighting power that receives from described lift unit comes luminous; And
Have first plate of the installation region that sets in advance and with the described first plate physical separation and have second plate of the installation region that sets in advance,
Wherein, described power supply unit and described inverter unit are mounted to described first plate, and described lift unit is mounted to described second plate.
2. system according to claim 1, wherein, described power supply unit comprises: the electromagnetic interference (EMI) suppression filter, eliminate the electromagnetic interference (EMI) of described commercial AC power; Rectifier is to carrying out level and smooth and rectification by the described AC power of described electromagnetic interference (EMI) suppression filter; And power factor corrector, be described DC power to carrying out power factor correction with the power transfer after will proofreading and correct through the described AC power of described rectifier rectification,
Described inverter unit comprises: switch, switch the power of being proofreaied and correct by described power factor corrector; And transformer one to one, the power transfer that will switch through described switch according to the identical ratio of winding that sets in advance be the AC power with voltage level identical with the described voltage level of described DC power, and
Described lift unit comprises: substation transformer, will promote from the described AC power of described transformer one to one according to the ratio of winding that sets in advance is described lamp lighting power, and described lamp luminous power is distributed to lamp.
3. system according to claim 2, wherein, described transformer one to one transfers to described substation transformer by cable with described AC power.
4. system according to claim 2, wherein, described substation transformer is the one-to-many substation transformer that described lamp lighting power is transferred to the substation transformer one to one of a lamp or described lamp lighting power is transferred at least two lamps.
5. system according to claim 2, wherein, the described switch of described inverter unit is by using full-bridge method, half-bridge method and recommending in the method any one and carry out blocked operation.
6. system according to claim 2, wherein, described first plate comprises elementary grounding parts with the ground area that sets in advance and the secondary grounding parts with the ground area of separating with the described ground area of described elementary grounding parts, and
The primary side of described electromagnetic interference (EMI) suppression filter, described rectifier, described power factor corrector, described switch and described transformer one to one is grounded to described elementary grounding parts, and the primary side ground connection of described transformer one to one is to described secondary grounding parts.
7. system according to claim 1, wherein, described lamp group comprises at least one external electrode fluorescent lamp, and the described lamp lighting power that described external electrode fluorescent lamp receives from described lift unit comes luminous.
8. system according to claim 7, wherein, described power supply unit comprises: the electromagnetic interference (EMI) suppression filter, eliminate electromagnetic interference (EMI) from described commercial AC power; Rectifier is to carrying out level and smooth and rectification by the described AC power of described electromagnetic interference (EMI) suppression filter; And power factor corrector, be described DC power to carrying out power factor correction with the power transfer after will proofreading and correct through the described AC power of described rectifier rectification,
Described inverter unit comprises: switch, switch the power of being proofreaied and correct by described power factor corrector; And transformer one to one, the power transfer that will switch through described switch according to the ratio of winding that sets in advance be the AC power with voltage level identical with the voltage level of described DC power, and
Described lift unit comprises: substation transformer, will promote to described lamp lighting power from the described AC power of described transformer one to one according to the ratio of winding that sets in advance, and give lamp with the power division after will promoting.
9. system according to claim 8, wherein, described substation transformer is the one-to-many substation transformer that described lamp lighting power is transferred to the substation transformer one to one of an external electrode fluorescent lamp or described lamp lighting power is transferred at least two external electrode fluorescent lamps.
10. system according to claim 8, wherein, by full-bridge method, half-bridge method and recommend in the method any one and switch the described switch of described inverter unit.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070072605 | 2007-07-20 | ||
| KR10-2007-0072605 | 2007-07-20 | ||
| KR1020070072605A KR100872255B1 (en) | 2007-07-20 | 2007-07-20 | Back-light operater for liquid crystal display |
| KR1020070120917 | 2007-11-26 | ||
| KR10-2007-0120917 | 2007-11-26 | ||
| KR1020070120917A KR100910505B1 (en) | 2007-11-26 | 2007-11-26 | Back-light operating system for liquid crystal display having external electrode fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101350173A CN101350173A (en) | 2009-01-21 |
| CN101350173B true CN101350173B (en) | 2011-07-20 |
Family
ID=40268946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100857137A Expired - Fee Related CN101350173B (en) | 2007-07-20 | 2008-03-13 | Backlight driving system for liquid crystal display |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100872255B1 (en) |
| CN (1) | CN101350173B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013095055A1 (en) * | 2011-12-21 | 2013-06-27 | 서울반도체 주식회사 | Backlight module, method for driving same and display device using same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517968A (en) * | 2003-01-24 | 2004-08-04 | 三星电子株式会社 | Back-light driving equipment for liquid crystal equipment |
| CN1670575A (en) * | 2004-03-15 | 2005-09-21 | Lg.菲利浦Lcd株式会社 | Backlight driving system for a liquid crystal display device |
| CN1683971A (en) * | 2004-04-14 | 2005-10-19 | Lg.菲利浦Lcd株式会社 | Driving unit of fluorescent lamp and its driving method |
| CN1892780A (en) * | 2005-06-30 | 2007-01-10 | Lg.菲利浦Lcd株式会社 | Driving apparatus for lamp of liquid crystal display device |
| CN1967322A (en) * | 2006-08-24 | 2007-05-23 | 深圳创维－Rgb电子有限公司 | Energy saving power supply of backlight source of LCD device |
| CN1991961A (en) * | 2005-12-27 | 2007-07-04 | Lg.菲利浦Lcd株式会社 | Hybrid backlight driving apparatus for liquid crystal display |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100876106B1 (en) * | 2005-11-24 | 2008-12-26 | 삼성전기주식회사 | Backlight assembly |
-
2007
- 2007-07-20 KR KR1020070072605A patent/KR100872255B1/en not_active IP Right Cessation
-
2008
- 2008-03-13 CN CN2008100857137A patent/CN101350173B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517968A (en) * | 2003-01-24 | 2004-08-04 | 三星电子株式会社 | Back-light driving equipment for liquid crystal equipment |
| CN1670575A (en) * | 2004-03-15 | 2005-09-21 | Lg.菲利浦Lcd株式会社 | Backlight driving system for a liquid crystal display device |
| CN1683971A (en) * | 2004-04-14 | 2005-10-19 | Lg.菲利浦Lcd株式会社 | Driving unit of fluorescent lamp and its driving method |
| CN1892780A (en) * | 2005-06-30 | 2007-01-10 | Lg.菲利浦Lcd株式会社 | Driving apparatus for lamp of liquid crystal display device |
| CN1991961A (en) * | 2005-12-27 | 2007-07-04 | Lg.菲利浦Lcd株式会社 | Hybrid backlight driving apparatus for liquid crystal display |
| CN1967322A (en) * | 2006-08-24 | 2007-05-23 | 深圳创维－Rgb电子有限公司 | Energy saving power supply of backlight source of LCD device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101350173A (en) | 2009-01-21 |
| KR100872255B1 (en) | 2008-12-05 |
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Effective date of registration: 20160204 Address after: Gyeonggi Do Korea Suwon Patentee after: Samsung Electro-Mechanics Co.,Ltd. Address before: Gyeonggi Do, South Korea Patentee before: Samsung Electro-Mechanics Co., Ltd. |
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