CN202093785U - LCD display equipment using LED backlight - Google Patents
LCD display equipment using LED backlight Download PDFInfo
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- CN202093785U CN202093785U CN2011201312290U CN201120131229U CN202093785U CN 202093785 U CN202093785 U CN 202093785U CN 2011201312290 U CN2011201312290 U CN 2011201312290U CN 201120131229 U CN201120131229 U CN 201120131229U CN 202093785 U CN202093785 U CN 202093785U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The present utility model provides a kind of LCD display equipment using an LED backlight. The LCD display equipment comprises a control device which is used for generating control signals for controlling brightness of different areas of the LED backlight according to brightness of different areas of images displayed by the LCD display equipment; and a driving device which is connected with the control device and used for driving the brightness of the different areas of the LED backlight according to the control signals, and LED lights of the LED backlight are arranged in a matrix from through the series-parallel connection way. By adopting the equipment, the control signals generated by the control device can be used to adjust areas of the LED backlight through the driving device, and the resolution of the display equipment can be increased. Through arranging the LED lights in a series-parallel connection way, the power consumption can be effectively reduced.
Description
Technical field
The utility model relates to a kind of LCD display device that adopts the LED-backlit source.
Background technology
At present, as the LCD backlight of (Liquid Crystal Display is called for short LCD), can make the LCD TV obtain higher contrast, brightness and color reducibility with light emitting diode (Light Emitting Diode is called for short LED).And LED is a kind of semiconductor solid-state optical source, does not contain any noxious material, is a kind of environmental protection light source.
LED-backlit of the prior art source LCD TV, just simply a plurality of LED are connected and constitute the lamp bar, have only two pins on each lamp bar, printed circuit board (PCB) (PrintedCircuit Board, abbreviation PCB) cabling in is that each LED lamp is together in series, so the voltage ratio at two ends is higher, and each LED lamp luminosity is the same, if there is a LED lamp to burn, can cause whole a string lamp bar secretly to fall.
Simultaneously, as shown in Figure 1, the backlight of prior art needs two integrated circuit (Integrated Circuit, be called for short IC) chip, be respectively LED T-con (TimingController sequential control) and LED Driver (driving) IC chip, give direct current of driving PCB plate (Direct Current is called for short DC) input by power panel, by the DC/DC transforming circuit, realize the electric current of an operate as normal of lamp bar again by constant-current source circuit again.This technology directly is connected the lamp bar with driving, drive and directly link to each other with power panel, a control system of LED chip for driving is handled and controlled to neither one specially, thereby can not realize the brightness of LED lamp is controlled, thereby can not realize reducing the purpose of power consumption.
At this problem, several solutions have been proposed, for example, publication number be CN101179891A patent disclosure a kind of LED-backlit source brightness control device, by control device and backlight drive device are set, adjusted the mode of operation in LED-backlit source, made it change into the interruption open mode, reached the purpose of control back light source brightness from continuing open mode.Only can change the unlatching or the disconnection of LED lamp in this patent, but its led light source adopts still the mode of series connection formation lamp bar to be connected, the voltage at lamp bar two ends is still than higher, and power consumption is bigger.
As seen from the above, need a kind of arrangement mode of new LED-backlit source to reduce the voltage at LED lamp bar two ends, thereby reduce power consumption; And the control device in new LED-backlit source realizes the luminance of LED lamp is carried out stepless control, and enhancing contrast ratio also realizes Region control to backlight.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of LCD display device that adopts the LED-backlit source, realizes the Region control to the LED-backlit source, thereby improves the contrast of display device and reduce power consumption.
To achieve these goals, the utility model proposes a kind of LCD display device that adopts the LED-backlit source, it is characterized in that this LCD display device comprises:
Adopt said structure, can realize the zone in LED-backlit source is adjusted via drive unit according to the control signal that control device generates, thereby improve the resolution of display device and reduce the power consumption in LED-backlit source.
The present invention is preferred, and described control device 200 also is used for being used to control the control signal that LED-backlit source 500 this area L ED lamps are closed according to the no datat zone generation of the image of LCD display device 400 demonstrations;
Described drive unit 300 also comprises the LED electric power driving module 350 that links to each other with control device 200, and the LED lamp that is used for controlling according to described control signal 500 described zones, LED-backlit source is closed.
Adopt said structure, can realize direct control, improved the degree of accuracy of control, simultaneously, expanded range of control, reduced the power consumption in LED-backlit source the LED lamp to the power supply in LED-backlit source.
The present invention is preferred, and described drive unit 300 comprises LCD drive unit and LED drive unit,
Wherein, the LCD drive unit comprises:
LCD time-sequence control module 310 links to each other with control device 200, is used to obtain the signal of the image that will show and handle;
Wherein, the LED drive unit comprises:
LED time-sequence control module 330 links to each other with control device 200, is used to obtain described control signal and handles;
Adopt said structure, draw the electric signal that can drive LCD display device and LED-backlit source, help guaranteeing the normal demonstration of display device thereby can carry out correct conversion to different signals.
The present invention is preferred, and described LED-backlit source 500 links to each other with LED driver module 340, comprises the LED matrix of the compound arrangement of connection in series-parallel.
The present invention is preferred, and described LED matrix is: per two LED series connection forms one group, and every group of LED is connected in parallel to LED driver module 340.
Adopt said structure, form the LED matrix, can reduce the driving voltage of LED lamp bar both sides, thereby reduce power consumption by parallel connection again that the LED lamp is contacted earlier.On the other hand, arrange, also help realizing Region control the LED-backlit source because LED is matrix form.
The present invention is preferred, and described control device 200 comprises drive control module 210.
Adopt said structure, can help more exactly control signal being exported to the LED time-sequence control module.
Description of drawings
Fig. 1 is the control flow chart in LED-backlit source in the prior art;
Fig. 2 is the theory diagram of LCD display device;
Fig. 3 is the connection diagram in LED-backlit source;
Fig. 4 is the control flow chart in the utility model LED-backlit source, is a kind of embodiment.
Embodiment
Display screen with the LCD televisor is an example below, specifically describes the LCD display device in the employing LED-backlit source that the utility model provides according to figure.
Fig. 2 is the theory diagram of display device, and as shown in Figure 2, the LCD display device 100 in this employing LED-backlit source comprises control device 200, drive unit 300, and LCD display device 400 and LED-backlit source 500.Wherein, drive unit 300 comprises LCD time-sequence control module 310, LCD driver module 320, LED time-sequence control module 330 and LED driver module 340, and LED electric power driving module 350.
On the one hand, this vision signal is changed into can compatible signal mode with LCD time-sequence control module 310 and LED time-sequence control module 330, and for example, transmission frequency is the Low Voltage Differential Signal of 60hz.On the other hand, generate and the corresponding control signal of the regional location in LED-backlit source according to the display properties of vision signal on LCD display device 400.
The display properties of LCD display device 400 described here is meant the display message of vision signal on the LCD display board, for example, and the particular location of image on the LCD display board, colorfulness, gray scale, shading value etc.Described corresponding main finger is identifying under the consistent display position situation, the brightness of adjusting the LED-backlit source according to the colorfulness or the lightness of LCD display board 400, for example, for the brighter zone of the screen picture of LCD display device 400, the luminance parameter of pixel is bigger, and at this moment just control is brighter with the LED lamp that this zone is complementary; For the darker zone of this screen picture, the luminance parameter of pixel is less, and at this moment just the LED lamp that is complementary of control and this place is closed or reduced brightness.Described control signal comprises at least according to the display message of vision signal on the LCD display device and generating and the corresponding to signal of the regional location in LED-backlit source.Like this, can discern the zone of the brightness needs adjustment of judging on the LED-backlit source 500, thereby realize control each area L ED lamp according to the zones of different display properties on the LCD display device 400.
LED-backlit source 500 links to each other with LED driver module 340, controls its generation brightness change by the electric signal that LED driver module 340 converts.This LED-backlit source 500 is made up of the LED matrix of the compound arrangement of connection in series-parallel.As shown in Figure 3, per two LED are connected into one group, form layout in parallel by a plurality of LED series connection groups.Adopt this connected mode, for example, then carry out parallel connection, then carry out parallel connection, by that analogy, then form the LED matrix by 4 groups of LED series connection groups for the lamp bar of 8 LED of every string by 5 groups of LED series connection groups for the lamp bar of 10 LED of every string.Wherein, per two LED are as a zone, lamp bar for 10 LED of every string just can be divided into five zones, the lamp bar of 8 LED of every string is equivalent to be divided into 4 zones, each zone is corresponding to a passage on the IC control chip circuit of LED driver module 340, each regional voltage all is identical, if exist deviation can utilize the method for pwm voltage to make the voltage power supply of work within a stable voltage specification.Each output channel of the IC control chip of LED driver module 340 can be electrically connected with each regional LED lamp, realizes each regional LED in the matrix is controlled.Like this, carry out layout by the LED lamp being carried out the compound form of connection in series-parallel, make LED-backlit source 500 be divided into a plurality of zones, each zone can reduce the voltage at LED lamp group two ends effectively corresponding to a passage, and reduces power consumption.
Fig. 4 is the control flow chart in LED-backlit source, join shown in Figure 4, drive control module 210 is the Low Voltage Differential Signal of 60Hz from TV SKD 600 frequency acquisitions, then this signal is carried out analyzing and processing and also therefrom identifies and the corresponding to control signal in the distributed areas in LED-backlit source 500.Be specially: with certain frequency (for example as the drive control module 210 of control device 200,60Hz) the vision signal of the whole screen picture of the corresponding LCD TV of collection, then according to the area size in LED-backlit source, whole screen picture is carried out subregion (generally can be divided into tens zones), then each regional vision signal is extracted the luminance parameter of this area pixel, the drive signal that calculates this area pixel according to the luminance parameter of this area pixel is a control signal.When the luminance parameter of screen picture area pixel was big, the electric signal that it should the zone drive signal was also bigger, at this moment just needs the LED lamp of corresponding region brighter, and the driving electric signal of LED lamp group that promptly flows through the corresponding region is bigger.
This drive control module 210 transfers to LCD time-sequence control module 310 with the Low Voltage Differential Signal that receives, the signal of 310 pairs of acceptance of this LCD time-sequence control module carries out treatment conversion and becomes timing control signal, LCD driver module 320 obtains this timing control signal and it is carried out analog to digital conversion, generate direct current or ac signal, this electric signal drives LCD display device 400 and carries out the video image demonstration; Synchronously, drive control module 210 with the control signal that generates via SPI (Serial Peripheral Interface, the high-speed synchronous serial port) interface transfers to LED time-sequence control module 330, the signal of 330 pairs of acceptance of this LED time-sequence control module is handled and is made it convert timing control signal to, LED driver module 340 obtains this timing control signal and it is carried out analog to digital conversion, generate direct current or ac signal, the LED lamp generation brightness in this electric signal driving LED backlight 400 changes.
In the said process, video image brightness on the brightness in LED-backlit source 400 and the LCD display device 500 is complementary, for example, when normally showing different pictures on the LCD display device 500, the dark part in corresponding viewing area, the control signal that generates by control device 200 make in the LED matrix that the LED lamp brightness at position consistency place is lowered or is switched off therewith, thereby realize the control of each area L ED lamp, simultaneously, the contrast of LCD and the power consumption of reduction LED have been improved.
The above only is preferred embodiment of the present utility model, not in order to restriction the utility model, for example, drive unit 300 is not limited to the aforementioned LCD time-sequence control module 310 that comprises, LCD driver module 320, LED time-sequence control module 330 and LED driver module 340, and LED electric power driving module 350.It can carry out suitable adjustment according to concrete application, for example, can be realized by the driving circuit that triode is formed for the LCD drive unit.In addition, above-mentioned various signals of mentioning and frequency thereof are not limited thereto only as a kind of embodiment.Simultaneously, described LED matrix also is not limited to shown in Figure 3, can also adopt other in parallel or string and compound arrangement modes, for example, all LED lamps in the lamp bar can be carried out parallel connection, realize that each LED controls as a zone, can control the bright dark of LED lamp according to the variation of data.Also have the connection and the signal transmission of each device or intermodule also to be not limited to the above-mentioned mode of enumerating, for example, drive control module 210 transfers to LED time-sequence control module 330 via the SPI interface with control signal, it also can carry out data transmission by other interface shapes, this part is a prior art, does not do at this and gives unnecessary details.
In a word, all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a LCD display device that adopts the LED-backlit source is characterized in that, this LCD display device comprises:
Control device (200), the brightness that is used for the zones of different of the image that shows according to LCD display device (400) generates the control signal that is used to control LED-backlit source (500) zones of different brightness;
Drive unit (300) links to each other with described control device (200), is used for the brightness according to described control signal driving LED backlight (500) zones of different.
2. LCD display device according to claim 1, it is characterized in that described control device (200) also is used for being used to control the control signal that LED-backlit source (500) this area L ED lamp is closed according to the no datat zone generation of the image of LCD display device (400) demonstration;
Described drive unit (300) also comprises the LED electric power driving module (350) that links to each other with control device (200), and the LED lamp that is used for controlling according to described control signal described zone, LED-backlit source (500) is closed.
3. LCD display device according to claim 1 and 2 is characterized in that, described drive unit (300) comprises LCD drive unit and LED drive unit,
Wherein, the LCD drive unit comprises:
LCD time-sequence control module (310) links to each other with control device (200), is used to obtain the signal of the image that will show and handle;
LCD driver module (320) links to each other with LCD time-sequence control module (310), is used for driving LCD display device (400) display image according to the signal after handling;
Wherein, the LED drive unit comprises:
LED time-sequence control module (330) links to each other with control device (200), is used to obtain described control signal and handles;
LED driver module (400) links to each other with LED time-sequence control module (330), is used for the brightness according to control signal driving LED backlight (500) zones of different after handling.
4. LCD display device according to claim 3 is characterized in that, described LED-backlit source (500) links to each other with LED driver module (340), comprises the LED matrix of the compound arrangement of connection in series-parallel.
5. LCD display device according to claim 4 is characterized in that, described LED matrix is: per two LED series connection forms one group, and every group of LED is connected in parallel to LED driver module (340).
6. LCD display device according to claim 3 is characterized in that, described control device (200) comprises drive control module (210).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201312290U CN202093785U (en) | 2011-04-27 | 2011-04-27 | LCD display equipment using LED backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201312290U CN202093785U (en) | 2011-04-27 | 2011-04-27 | LCD display equipment using LED backlight |
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| CN202093785U true CN202093785U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201312290U Expired - Lifetime CN202093785U (en) | 2011-04-27 | 2011-04-27 | LCD display equipment using LED backlight |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768820A (en) * | 2012-07-23 | 2012-11-07 | 深圳市大象视界科技有限公司 | LED large screen display device and driving circuit and driving method thereof |
| CN103687212A (en) * | 2013-11-29 | 2014-03-26 | 青岛威力电子科技有限公司 | High-brightness LED lamp and control circuit |
| CN103796380A (en) * | 2013-12-25 | 2014-05-14 | 深圳市华星光电技术有限公司 | Liquid crystal display device, and backlight source and light modulation method thereof |
| CN104019404A (en) * | 2014-05-23 | 2014-09-03 | 深圳市华星光电技术有限公司 | Backlight module, display device and drive method of display device |
| CN104461434A (en) * | 2014-12-19 | 2015-03-25 | 深圳创维－Rgb电子有限公司 | Screen display size adjusting method and device |
| CN107045851A (en) * | 2016-02-05 | 2017-08-15 | 大陆汽车电子(芜湖)有限公司 | Head-up display method for controlling backlight thereof based on SPI |
| CN108109591A (en) * | 2017-11-03 | 2018-06-01 | 硅谷数模半导体（北京）有限公司 | The control device and notebook panel of display screen |
| CN108681148A (en) * | 2018-04-28 | 2018-10-19 | 珠海晨新科技有限公司 | A kind of LED backlight and LED display |
| CN108831314A (en) * | 2018-04-28 | 2018-11-16 | 珠海晨新科技有限公司 | A kind of LED backlight light-emitting control method |
| CN109791324A (en) * | 2016-10-07 | 2019-05-21 | 夏普株式会社 | Display device |
| CN111081193A (en) * | 2020-01-07 | 2020-04-28 | 业成科技（成都）有限公司 | Display and brightness adjusting method thereof |
| CN112992081A (en) * | 2021-03-08 | 2021-06-18 | 京东方科技集团股份有限公司 | Backlight plate, display panel and control method of backlight plate |
| WO2022047667A1 (en) * | 2020-09-02 | 2022-03-10 | 祝君芬 | Lcd and led hybrid display screen and lcd and led hybrid screen clock |
| US12001173B2 (en) | 2021-06-23 | 2024-06-04 | Yuguang Lin | LCD and led hybrid display screen and LCD and led clock with LCD and led hybrid display screen |
-
2011
- 2011-04-27 CN CN2011201312290U patent/CN202093785U/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768820A (en) * | 2012-07-23 | 2012-11-07 | 深圳市大象视界科技有限公司 | LED large screen display device and driving circuit and driving method thereof |
| CN102768820B (en) * | 2012-07-23 | 2015-01-28 | 深圳市大象视界科技有限公司 | LED large screen display device and driving circuit and driving method thereof |
| CN103687212A (en) * | 2013-11-29 | 2014-03-26 | 青岛威力电子科技有限公司 | High-brightness LED lamp and control circuit |
| CN103796380A (en) * | 2013-12-25 | 2014-05-14 | 深圳市华星光电技术有限公司 | Liquid crystal display device, and backlight source and light modulation method thereof |
| CN103796380B (en) * | 2013-12-25 | 2016-08-17 | 深圳市华星光电技术有限公司 | Liquid crystal indicator and backlight thereof and light-dimming method |
| CN104019404A (en) * | 2014-05-23 | 2014-09-03 | 深圳市华星光电技术有限公司 | Backlight module, display device and drive method of display device |
| CN104461434A (en) * | 2014-12-19 | 2015-03-25 | 深圳创维－Rgb电子有限公司 | Screen display size adjusting method and device |
| CN104461434B (en) * | 2014-12-19 | 2018-09-04 | 深圳创维－Rgb电子有限公司 | Adjust the method and device of screen display size |
| CN107045851A (en) * | 2016-02-05 | 2017-08-15 | 大陆汽车电子(芜湖)有限公司 | Head-up display method for controlling backlight thereof based on SPI |
| US10852536B2 (en) | 2016-02-05 | 2020-12-01 | Continental Automotive Gmbh | SPI-based head-up display backlight control method |
| CN107045851B (en) * | 2016-02-05 | 2019-08-02 | 大陆汽车车身电子系统（芜湖）有限公司 | Head-up display method for controlling backlight thereof based on SPI |
| CN109791324A (en) * | 2016-10-07 | 2019-05-21 | 夏普株式会社 | Display device |
| CN108109591A (en) * | 2017-11-03 | 2018-06-01 | 硅谷数模半导体（北京）有限公司 | The control device and notebook panel of display screen |
| CN108831314A (en) * | 2018-04-28 | 2018-11-16 | 珠海晨新科技有限公司 | A kind of LED backlight light-emitting control method |
| CN108681148A (en) * | 2018-04-28 | 2018-10-19 | 珠海晨新科技有限公司 | A kind of LED backlight and LED display |
| CN111081193A (en) * | 2020-01-07 | 2020-04-28 | 业成科技（成都）有限公司 | Display and brightness adjusting method thereof |
| WO2022047667A1 (en) * | 2020-09-02 | 2022-03-10 | 祝君芬 | Lcd and led hybrid display screen and lcd and led hybrid screen clock |
| CN112992081A (en) * | 2021-03-08 | 2021-06-18 | 京东方科技集团股份有限公司 | Backlight plate, display panel and control method of backlight plate |
| US12001173B2 (en) | 2021-06-23 | 2024-06-04 | Yuguang Lin | LCD and led hybrid display screen and LCD and led clock with LCD and led hybrid display screen |
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Effective date of registration: 20151225 Address after: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee after: haier group corporation Patentee after: Qingdao Haier Electric Appliance Co., Ltd. Patentee after: Qingdao Haier Photoelectric Co., Ltd. Patentee after: Qingdao Jiaonan Haier Electronic Co., Ltd. Patentee after: Hefei Haier Information Product Co., Ltd. Patentee after: QINGDAO HAIER MULTI-MEDIA CO., LTD. Address before: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee before: haier group corporation Patentee before: Qingdao Haier Electric Appliance Co., Ltd. Patentee before: Qingdao Haier Photoelectric Co., Ltd. Patentee before: Qingdao Jiaonan Haier Electronic Co., Ltd. Patentee before: Hefei Haier Information Product Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20111228 |
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| CX01 | Expiry of patent term |