CN201374846Y - Backlight module and liquid crystal display module thereof - Google Patents
Backlight module and liquid crystal display module thereof Download PDFInfo
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- CN201374846Y CN201374846Y CN200920135260U CN200920135260U CN201374846Y CN 201374846 Y CN201374846 Y CN 201374846Y CN 200920135260 U CN200920135260 U CN 200920135260U CN 200920135260 U CN200920135260 U CN 200920135260U CN 201374846 Y CN201374846 Y CN 201374846Y
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- backlight
- module
- liquid crystal
- crystal display
- led lamp
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Abstract
The utility model discloses a backlight module and a liquid crystal display module thereof. The backlight module comprises a backlight source, a controller and a driving module, wherein the backlight source is connected with the driving module, the driving module is connected with the controller, and the backlight source is driven by the driving module under control of the controller to emit light with adjustable curve of spectrum. The liquid crystal display module comprises the backlight module and a liquid crystal display module, and the backlight module is enabled to emit light with a curve of spectrum matching with that of a color filter of the liquid crystal display module. The curve of spectrum provided by the backlight module can be adjusted, and through certain adjustment, the curve of spectrum of the light emitted by the backlight source matches with that of the color filter of the liquid crystal display module relatively, thereby further increasing fine reproducibility of the liquid crystal display module for displaying colors.
Description
[technical field]
The utility model relates to a kind of backlight module, also relates to a kind of liquid crystal display module that includes this backlight module simultaneously, and this liquid crystal display module has good color reprodubility.
[background technology]
In recent years, lcd technology has obtained development fast, and LCD also becomes important part in the daily entertainment life of people.And be accompanied by improving constantly of people's quality of life, people have also proposed more and more higher requirement to the display quality of LCD.
Referring to Fig. 3, as everyone knows, colour liquid crystal display device mainly by last polaroid 101, colored filter add the ITO electrode top glass substrate 102, go up oriented layer 103, liquid crystal layer 104, down oriented layer 105, plating ITO electrode lower glass substrate 106, polaroid 107 and backlight module 200 are formed down.The color saturation of colour liquid crystal display device depends primarily on the coupling of the curve of spectrum of the curve of spectrum of backlight and colored filter.Under the state that colour liquid crystal display device shows, light is sent by backlight, enters human eye through colored filter.Wherein, can be depended on backlight, can be depended on colored filter by the light wavelength scope that human eye receives through after the LCD by the light wavelength scope that LCD is utilized.Traditional colour liquid crystal display device adopts the backlight based on blue LED coupling yellow fluorescent powder, the curve of spectrum based on the backlight of blue LED coupling yellow fluorescent powder and colour liquid crystal display device colored filter as shown in Figure 1 mates schematic diagram, wherein a represents the backlight curve of spectrum, b represents the colored filter curve of spectrum, the curve of spectrum that this backlight sends light is about 430nm～450nm at wavelength, two sections peak values are arranged in the scope of 560nm～630nm, and the light penetration of colour liquid crystal display device colored filter in these two wave-length coverages is relatively low, make that the light of part wavelength can not be through LCD and to be received by human eye, zone shown in a-quadrant among Fig. 1, thus cause the color saturation of LCD lower.
Simultaneously, it is red that employing blue LED coupling also appearred in industry, the backlight of green emitting phosphor, mating based on blue LED as shown in Figure 2 is red, the curve of spectrum coupling schematic diagram of the backlight of green emitting phosphor and colour liquid crystal display device colored filter, wherein c represents the backlight curve of spectrum, d represents the colored filter curve of spectrum, the peak value of the curve of spectrum that this backlight provides can more effectively mate with the peak value of the curve of spectrum of colour liquid crystal display device colored filter, be the light loss zone as B zone among Fig. 2, can find out that it adopts the color saturation that can more effectively promote colour liquid crystal display device based on the backlight of blue LED coupling yellow fluorescent powder relatively, but at colour liquid crystal display device colored filter with different curves of spectrum, all need to develop again backlight and be complementary with it, this makes that the matching and debugging of backlight and colour liquid crystal display device colored filter is very complicated.
[utility model content]
A purpose of the present utility model is to provide a kind of curve of spectrum that it provides adjustable backlight module, and its technical scheme is:
A kind of backlight module, wherein, described backlight module comprises backlight, controller and driver module, described backlight is connected with described driver module, described driver module is connected with described controller, described driver module drives described backlight under the control of described controller, send the adjustable light of its curve of spectrum.
The curve of spectrum that provides with respect to backlight module in the conventional art does not have the problem of adjustability, the backlight module that the utility model provides is by being provided with controller and driver module, thereby by being pre-stored in the controller or the instruction of interim input is sent control command to described driver module, thereby drive lighting and extinguishing of backlight described in the described backlight module, thereby the adjustable purpose of its curve of spectrum that provides of control is provided.
Simultaneously, another purpose of the present utility model also is to provide a kind of liquid crystal display module with good color reprodubility, and its technical scheme is:
A kind of liquid crystal display module, described liquid crystal display module comprises: backlight module, and LCD MODULE, described LCD MODULE is disposed at described backlight module top, this LCD MODULE comprises colored filter, wherein, described backlight module comprises backlight, controller and driver module, described backlight is connected with described driver module, described driver module is connected with described controller, described driver module drives described backlight under the control of described controller, send the light of the curve of spectrum coupling of its curve of spectrum and described colored filter.
The liquid crystal display module that the utility model provides is by being provided with controller and driver module, thereby by being pre-stored in the controller or the instruction of interim input is sent control command to described driver module, thereby drive lighting and extinguishing of backlight described in the described backlight module, thereby reach the adjustable purpose of its curve of spectrum that provides of control, and extract the curve of spectrum of the color filer that described LCD MODULE comprises by certain means, thereby by certain adjusting, can be so that relative coupling of the curve of spectrum of the colored filter that the curve of spectrum of the light that described backlight sends and described LCD MODULE comprise, and then improved the well reproduced of its display color.
Feature of the present utility model and advantage will be elaborated in conjunction with Figure of description by embodiment.
[description of drawings]
Fig. 1 is the curve of spectrum coupling schematic diagram based on the backlight of blue LED coupling yellow fluorescent powder and colour liquid crystal display device colored filter;
Fig. 2 is the curve of spectrum coupling schematic diagram based on the backlight of blue LED coupling redness, green emitting phosphor and colour liquid crystal display device colored filter;
The structural representation of a kind of embodiment of liquid crystal display module that Fig. 3 provides for the utility model;
The structural representation of a kind of embodiment of backlight that Fig. 4 provides for the utility model;
The structural representation of a kind of embodiment of backlight that the backlight module that Fig. 5 the utility model provides comprises;
The signal waveform schematic diagram of the control signal that the backlight driver module that Fig. 6 provides for the utility model provides;
In the liquid crystal display module that Fig. 7 provides for the utility model based on the backlight of red, green, blue Tricolor LED and the curve of spectrum coupling schematic diagram of colored filter.
[embodiment]
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A purpose of the present utility model is to provide a kind of curve of spectrum that it provides adjustable backlight module, and another purpose also is to provide a kind of liquid crystal display module with good color reprodubility, and details are as follows:
Referring to Fig. 4, a kind of backlight module that the utility model provides, comprise backlight 4, controller 1 and driver module 2, described backlight 4 is connected with described driver module 2, described driver module 2 is connected with described controller 1, described driver module 2 drives described backlight 4 under the control of described controller 1, send the adjustable light of its curve of spectrum.
As shown in Figure 5, an embodiment of the backlight module that provides according to the utility model, described backlight 4 can be a LED lamp group 5, described LED lamp group 5 comprises a red light emitting diodes, a green LED and a blue LED, described red light emitting diodes, green LED and blue LED parallel connection.
Perhaps another embodiment of the backlight module that provides according to the utility model, described backlight comprises a plurality of LED lamp groups 5, described each LED lamp group 5 comprises a red light emitting diodes respectively, a green LED and a blue LED, and a plurality of red light emitting diodes that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the first series connection group, a plurality of green LEDs that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the second series connection group, a plurality of blue LEDs that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the 3rd series connection group, for example, the described first series connection group is formed by a plurality of red light emitting diodes series connection, the described second series connection group is formed by a plurality of green LED series connection, described the 3rd series connection group is formed by a plurality of blue LED series connection, and, the described first series connection group, the second series connection group and the 3rd series connection group parallel connection.
Embodiment at above-described two kinds of backlights, described single led lamp group 5 or a plurality of LED lamp group 5 drive by described driver module 2, described driver module 2 is after the instruction of controlled device 1, drive described LED lamp group 5 and extinguish according to the rule of setting or light, thereby reached the adjustable purpose of the curve of spectrum of controlling the light that its backlight 4 sends.In specific implementation process, described driver module 2 is preferably the diode current control chip, and described diode current control chip has I
2Wherein at least a of C data-interface or serial data interface is used to transmit data.
The backlight module that the utility model provides is by being provided with controller 1 and driver module 2, thereby by being pre-stored in the controller 1 or the instruction of interim input is sent control command to described driver module 2, thereby drive lighting and extinguishing of the backlight 4 described in the described backlight module, thereby the adjustable purpose of its curve of spectrum that provides of control is provided.
And in the middle of actual conditions, LED lamp group 5 is accompanied by in luminous process and produces a large amount of heats, makes the temperature of LED lamp group 5 change, and to cause its curve of spectrum that sends light little change can take place.If do not adopt temperature sensor to compensate control at this moment, final mix " white light " that obtain will depart from, and white Huang or the like colour cast phenomenon partially occurs.In order under different temperatures, white chromaticity coordinates value to be compensated, the backlight module that the utility model provides also comprises temperature sensor 3, as shown in Figure 4, described temperature sensor 3 places on the described backlight 4, the real time temperature of the LED lamp group 5 that comprises in order to the sensing backlight, and be connected to described driver module 2, the real time temperature feedback information that is used for sensing is to driver module 2, described temperature information is through after the processing of described controller 1, in order to the reference value of white chromaticity coordinates value by way of compensation.
A kind of liquid crystal display module that the utility model provides, described liquid crystal display module comprises: backlight module, and LCD MODULE, described LCD MODULE is disposed at described backlight module top, this LCD MODULE includes colored filter, wherein, described backlight module comprises backlight 4, controller 1 and driver module 2, described backlight 4 is connected with described driver module 2, described driver module 2 is connected with described controller 1, described driver module 2 drives described backlight 4 under the control of described controller 1, send the light of the curve of spectrum coupling of its curve of spectrum and described colored filter.
Equally, as shown in Figure 5, described backlight can comprise one or more LED lamp groups 5, when included LED lamp group 5 is one, described LED lamp group 5 comprises a red light emitting diodes, a green LED and a blue LED, described red light emitting diodes, green LED and blue LED parallel connection.
When described backlight comprises a plurality of LED lamp group 5, described each LED lamp group 5 comprises a red light emitting diodes, a green LED and a blue LED, and a plurality of red light emitting diodes that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the first series connection group, a plurality of green LEDs that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the second series connection group, a plurality of blue LEDs that described a plurality of LED lamp group 5 comprises are connected one by one and are formed the 3rd series connection group, the described first series connection group, the second series connection group and the 3rd series connection group parallel connection, in specific implementation process, described driver module 2 is preferably the diode current control chip, and described diode current control chip has I
2Wherein at least a of C data-interface or serial data interface is used to transmit data.
The liquid crystal display module that the utility model provides is by being provided with controller 1 and driver module 2, thereby by being pre-stored in the controller 1 or the instruction of interim input is sent control command to described driver module 2, thereby drive lighting and extinguishing of the backlight 4 described in the described backlight module, thereby reach the adjustable purpose of its curve of spectrum that provides of control, and extract the curve of spectrum of the color filer that described LCD MODULE comprises by certain means, thereby by certain adjusting, can be so that relative coupling of the curve of spectrum of the color filer that the curve of spectrum of the light that described backlight 4 sends and described LCD MODULE comprise, and then improved the well reproduced of its display color.
In addition, in concrete real process, under condition of different temperatures, adopt temperature sensor to be used for white chromaticity coordinates value is compensated, to remain on the value unanimity of backlight white chromaticity coordinates under the different temperature.As shown in Figure 4, controller 1 is connected with described driver module 2, and described driver module 2 is connected with described backlight 4, and described temperature sensor 3 places on the described backlight 4 and is connected to described driver module 2.Controller 1 passes through I by being pre-stored in controller 1 or inputing to the program or the instruction of controller 1 in real time
2The C/SPI data-interface is sent to driver module 2 with program or instruction, the instruction that driver module 2 provides according to controller 1 reaches the signal by temperature sensor 3 feedbacks, and output R_OUT, G_OUT, three voltage control signals of B_OUT are controlled redness, green, blue LED respectively.
As shown in Figure 6, the signal waveform of R_OUT, G_OUT, three voltage control signals of B_OUT is the rectangle square wave.When control signal was output as high level, the light-emitting diode conducting was luminous; When control signal was output as low level, light-emitting diode was not by luminous.And each signal period T of control signal remains unchanged, as long as export high level time and the ratio of output low level time in signal period T of control, just can control the fluorescent lifetime of light-emitting diode.Control R_OUT, G_OUT, three voltage control signals of B_OUT simultaneously, just can obtain the light of different redness, green, blue component, combine the output light that just can obtain having the different curves of spectrum, finally reach the purpose that the control backlight sends the curve of spectrum of light, thus by gathering the curve of spectrum of colored filter, for example adopt spectrophotometer, its curve of spectrum is comparatively reasonably mated with it, so that can be so that the saturation of the color of the demonstration of liquid crystal display mode group is improved.
As shown in Figure 7, employing is based on the backlight of the red, green, blue Tricolor LED backlight as the Color Liquid Crystal Display module, by regulating the output of diode current control chip, can be so that backlight sends the relative higher wave-length coverage with colored filter curve of spectrum transmitance of wave-length coverage at peak value place of the curve of spectrum of light near consistent (dotted line is represented the backlight curve of spectrum among the figure, and solid line is represented the colored filter curve of spectrum).Because these three kinds of colors of red, green, blue are three-primary colours, can obtain all colors that the occurring in nature human eye can be discerned by these three kinds of color combinations, make these three kinds of primary colours light of red, green, blue can more effectively see through LCD, thereby the quantity through formation color capable of being combined after the LCD increases widely, and then the quantity of the color that can be received by human eye also just increased widely, so that can improve the color saturation of colour liquid crystal display device effectively.
Adopt the backlight module that the utility model provides or the advantage of liquid crystal display module for better explanation, provide the method and the data relatively of one group of contrast here, as follows:
Choose two same LCD MODULE, only the backlight module difference that adopts in the test process, to form two groups of different liquid crystal display modules, first group of liquid crystal display module adopts the backlight module that mates yellow fluorescent powder based on blue LED, second group of backlight module that the liquid crystal display module adopts the utility model to provide.
The color saturation that adopts BM-7 colourity tester to test two groups of liquid crystal display modules respectively in the test process adopts the extensively general international CIE1931 colorimeter system of present display relevant industries (the additive colo(u)r system method for expressing of the color that Commission Internationale De L'Eclairage demarcated in 1931) to describe test result.The color saturation test data of two kinds of Color Liquid Crystal Display modules is as shown in the table:
Can obtain in the test data from table, the color saturation that adopts liquid crystal display module of the present utility model has greatly improved with respect to the color saturation of traditional Color Liquid Crystal Display module.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1, a kind of backlight module, it is characterized in that, described backlight module comprises backlight, controller and driver module, described backlight is connected with described driver module, described driver module is connected with described controller, described driver module drives described backlight under the control of described controller, send the adjustable light of its curve of spectrum.
2, backlight module according to claim 1, it is characterized in that, described backlight comprises a LED lamp group, described LED lamp group comprises a red light emitting diodes, a green LED and a blue LED, described red light emitting diodes, green LED and blue LED parallel connection.
3, backlight module according to claim 1, it is characterized in that, described backlight comprises a plurality of LED lamp groups, described each LED lamp group comprises a red light emitting diodes respectively, a green LED and a blue LED, and a plurality of red light emitting diodes that described a plurality of LED lamp group comprises are connected one by one and are formed the first series connection group, a plurality of green LEDs that described a plurality of LED lamp group comprises are connected one by one and are formed the second series connection group, a plurality of blue LEDs that described a plurality of LED lamp group comprises are connected one by one and are formed the 3rd series connection group, the described first series connection group, the second series connection group and the 3rd series connection group parallel connection.
4, according to any described backlight module in the claim 1 to 3, it is characterized in that also comprise temperature sensor, described temperature sensor places on the described backlight, and be connected to described driver module.
5, backlight module according to claim 4 is characterized in that, described driver module is the diode current control chip, and described diode current control chip has I
2Wherein at least a of C data-interface or serial data interface.
6, a kind of liquid crystal display module, described liquid crystal display module comprises: backlight module, and LCD MODULE, described LCD MODULE is disposed at described backlight module top, this LCD MODULE comprises colored filter, it is characterized in that, described backlight module comprises backlight, controller and driver module, described backlight is connected with described driver module, described driver module is connected with described controller, described driver module drives described backlight under the control of described controller, send the light of the curve of spectrum coupling of its curve of spectrum and described colored filter.
7, liquid crystal display module according to claim 6, it is characterized in that, described backlight comprises a LED lamp group, described LED lamp group comprises a red light emitting diodes, a green LED and a blue LED, described red light emitting diodes, green LED and blue LED parallel connection.
8, liquid crystal display module according to claim 6, it is characterized in that, described backlight comprises a plurality of LED lamp groups, described each LED lamp group comprises a red light emitting diodes respectively, a green LED and a blue LED, and a plurality of red light emitting diodes that described a plurality of LED lamp group comprises are connected one by one and are formed the first series connection group, a plurality of green LEDs that described a plurality of LED lamp group comprises are connected one by one and are formed the second series connection group, a plurality of blue LEDs that described a plurality of LED lamp group comprises are connected one by one and are formed the 3rd series connection group, the described first series connection group, the second series connection group and the 3rd series connection group parallel connection.
9, according to any described liquid crystal display module in the claim 6 to 8, it is characterized in that also comprise temperature sensor, described temperature sensor places on the described backlight, and be connected to described driver module.
10, liquid crystal display module according to claim 9 is characterized in that, described driver module is the diode current control chip, and described diode current control chip has I
2Wherein at least a of C data-interface or serial data interface.
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|---|---|---|---|
| CN200920135260U CN201374846Y (en) | 2009-02-27 | 2009-02-27 | Backlight module and liquid crystal display module thereof |
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| CN200920135260U CN201374846Y (en) | 2009-02-27 | 2009-02-27 | Backlight module and liquid crystal display module thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094320A1 (en) * | 2012-12-20 | 2014-06-26 | 深圳市华星光电技术有限公司 | Protection circuit of backlight drive circuit, backlight module and liquid crystal display device |
| US8933646B2 (en) | 2012-12-20 | 2015-01-13 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Protection circuit for backlight driver circuit, backlight module, and LCD device |
| CN104315409A (en) * | 2014-10-15 | 2015-01-28 | 合肥美的电冰箱有限公司 | Backlight module, method for producing colored lights by backlight module and display |
-
2009
- 2009-02-27 CN CN200920135260U patent/CN201374846Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094320A1 (en) * | 2012-12-20 | 2014-06-26 | 深圳市华星光电技术有限公司 | Protection circuit of backlight drive circuit, backlight module and liquid crystal display device |
| US8933646B2 (en) | 2012-12-20 | 2015-01-13 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Protection circuit for backlight driver circuit, backlight module, and LCD device |
| CN104315409A (en) * | 2014-10-15 | 2015-01-28 | 合肥美的电冰箱有限公司 | Backlight module, method for producing colored lights by backlight module and display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN BYD ELECTRONIC COMPONENT CO., LTD. Free format text: FORMER OWNER: BIYADI CO., LTD. Effective date: 20150906 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150906 Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen BYD Electronic Component Co., Ltd. Address before: 518118 Pingshan Road, Pingshan Town, Shenzhen, Guangdong, No. 3001, No. Patentee before: Biyadi Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |