CN101876409A - Backlight module capable of fine-tuning chromaticity and light mixing method thereof - Google Patents
Backlight module capable of fine-tuning chromaticity and light mixing method thereof Download PDFInfo
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- CN101876409A CN101876409A CN2009100505503A CN200910050550A CN101876409A CN 101876409 A CN101876409 A CN 101876409A CN 2009100505503 A CN2009100505503 A CN 2009100505503A CN 200910050550 A CN200910050550 A CN 200910050550A CN 101876409 A CN101876409 A CN 101876409A
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Abstract
The invention relates to a backlight module capable of fine-tuning chromaticity and a light mixing method thereof. In the invention, the backlight module comprises a light guide plate and a plurality of white light LEDs. The plurality of white light LEDs are arranged on the side edges of the light guide plate and are used for projecting rays to enter the light guide plate; the white light LEDs comprise two or more different chromaticity, and the white light LEDs with the same chromaticity are combined into a group and respectively connected with a separate circuit loop; the white light LEDs with the different chromaticity respectively generate different light colors which are emitted into the light guide plate when the current is introduced, and the mixed light is formed in the light guide plate, and the light color is fine-tuned to change between the specific chromaticity through controlling electrical flow quantity. The invention has the advantages of fine-tuning the chromaticity or the color temperature and having low cost.
Description
Technical field
The present invention relates to a kind ofly can be applied to be the backlight module of light-emitting device, to relate in particular to the light-source structure and the light mixing method thereof of this backlight module such as make displays such as LCD TV, computer, mobile phones.
Background technology
For some electronic products, whether its operation-interface can be luminous except relating to illuminating effect, also is related to the surcharge of aspects such as visual appearance, texture.Described operation-interface with illumination effect, usually include a backlight module, the structure of this backlight module mainly includes a LGP and at least one light source, LGP comprises an exiting surface and at least one incidence surface, the bottom surface relative with exiting surface is usually as incidence surface, maybe can be with the side of LGP as incidence surface, and light source is set in this incidence surface; The front of the LGP blooming pieces such as brightening piece, diffusion sheet that can be sticked in regular turn by actual needs.The side-light type LGP that generally is used, promptly at least one side at LGP is provided with light source, and the bottom surface of LGP is provided with reflector plate usually, be recycled to rearrangement utilization in the LGP with the light reflection that will overflow LGP, and prevent the backlight module light leak, light through brightening piece and diffusion sheet is derived by predetermined visual angle or direction, to present the good brilliant degree and the uniformity.
Described light source can be light emitting diode (LED, light emitting diode) or cold-cathode tube (CCFL); Because the advantage of little, the little power consumption of volume, long service life, be used in the existing trend that replaces CCFL gradually by LED of light source of backlight module.The light source that is used in backlight module uses white light more, and the method for utilizing LED to produce white light has two kinds:
First kind is to add fluorescer to absorb blue light in blue light diode, and then discharges white light, and its colourity is by the wavelength and the decision of fluorescer composition of blue chip.Its advantage is that driver circuit is simple; Shortcoming then is once selected colourity or colour temperature, promptly can't adjust in actual applications.
Another kind of white light then reaches via suitable mixture of red, coloured light green, blue three-color.Its advantage is the collocation by the red, green, blue drive current, can adjust the light (comprising white light) of full gamut.Shortcoming is the design complexity of driver circuit, and cost is very high.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of backlight module of fine-tuning colourity, are intended to solve the above problems;
The present invention also provides a kind of light mixing method that adopts this backlight module.
In order to solve the problems of the technologies described above, backlight module of the present invention is achieved through the following technical solutions:
The present invention includes: a LGP; Also comprise: be located at the side of this LGP, in order to ray cast is entered the plural white light LEDs of this LGP; Described white light LEDs includes two or more different colourities, and the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively; When feeding electric current, the white light LEDs of different colourities produces different photochromic injecting in the LGP respectively, and forms mixed light in this LGP, by the control magnitude of current, then can fine setting change photochromic between a specific colourity.
Light mixing method of the present invention is realized by following steps:
Be located at the side of LGP in order to the plural white light LEDs that ray cast is entered this LGP;
Described white light LEDs includes two or more different colourities, and the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively;
When feeding electric current, the white light LEDs of different colourities produces different photochromic injecting in the LGP respectively, and forms mixed light in this LGP;
By the control magnitude of current, then can between a specific colourity, fine setting change photochromic.
Compared with prior art, the invention has the beneficial effects as follows: can inching colourity or colour temperature, and with low cost.
Description of drawings
Fig. 1 is provided with the plural white light LEDs of two kinds of different colourities for showing the present invention at LGP one side, and the white light LEDs of different colourity is the embodiment schematic diagram of staggered laying;
Fig. 2 is provided with the plural white light LEDs of three kinds of different colourities for showing the present invention at LGP one side, and the white light LEDs of different colourity is the embodiment schematic diagram of cycle arrangement laying in regular turn;
Fig. 3 is provided with the plural white light LEDs of two kinds of different colourities for showing the present invention respectively at the relative dual-side of LGP, and the white light LEDs of different colourity is the embodiment schematic diagram of staggered laying;
Fig. 4 is provided with the plural white light LEDs of two kinds of different colourities for showing the present invention respectively at LGP three sides, and the white light LEDs of different colourity is the embodiment schematic diagram of staggered laying;
Fig. 5 is provided with the plural white light LEDs of two kinds of different colourities for showing the present invention respectively at the LGP four side, and the white light LEDs of different colourity is the embodiment schematic diagram of staggered laying.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
The present invention is that at least one side at LGP is provided with plural white light LEDs, described white light LEDs includes different colourities more than two kinds, the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively, when feeding electric current, the white light LEDs of different colourities produces the different photochromic LGPs that enters respectively, and in LGP, form mixed light, again, size by the control magnitude of current, can change colourity, and this colourity is that (for example between the white light LEDs in described different colourities) fine setting changes in a specific chromaticity range.
A wherein technological means of the present invention, be that a side at a LGP is provided with plural white light LEDs, this white light LEDs includes two kinds of different colourities, the first colourity white light LEDs and the second colourity white light LEDs are the staggered ground of arranging and arrange, and each first colourity white light LEDs is an independently circuit loop of one group of connection one, each second colourity white light LEDs is one group and connects another independently circuit loop, by feeding the different magnitudes of current, can make the first colourity white light LEDs and/or the second colourity white light LEDs produce the light of different colourities, when changing the magnitude of current, can change the colourity of light, the mixed light that produces in LGP also thereby change colourity.
Another technological means of the present invention, the white light LEDs that can have three or more different colourities in a side setting of LGP, the white light LEDs of these three kinds of different colourities cycle arrangement is in regular turn laid, and the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively, finely tunes the colourity that changes light by feeding the different magnitudes of current.
The present invention also can be located at the laying of aforementioned several different colourity white light LEDs more than the dual side-edge of LGP, and the limit number of its setting can be decided according to the area size of LGP.
Consult shown in Figure 1, the first embodiment of the present invention is to lay plural light source 2 in a side of a LGP 1, and described light source package contains the first colourity white light LEDs 21 and the second colourity white light LEDs 22 of two kinds of different colourities, it can be laid equidistantly, also can not lay equidistantly; Again, based on the consideration of LGP uniformity of luminance, the described first colourity white light LEDs 21 and the second colourity white light LEDs 22 are to be staggered to arrange, and the luminous energy of injecting in the LGP is covered alternately; Wherein, those first colourity white light LEDs, 21 common connections one are circuit loop independently, those second colourity white light LEDs, 22 common another independently circuit loops that connect; When feeding electric current, so that the light that those LED produce is injected LGP 1, and the white light LEDs of different colourities produce respectively different photochromic, this different photochromic in described LGP 1 mixed light, this is photochromic thereby show at LGP.The present invention can change photochromic respectively by controlling the magnitude of current size that feeds the first colourity white light LEDs 21 and/or the second colourity white light LEDs 22 respectively, make LGP show different colourity, and the difference of this colourity can be finely tuned change between the different colourities of described white light LEDs.
Fig. 2 shows another embodiment of the present invention, can lay the first colourity white light LEDs 21, the second colourity white light LEDs 22 and the 3rd colourity white light LEDs that includes three kinds of different colourities in a side of a LGP 1, those LED can lay equidistantly, also can not lay equidistantly; At this embodiment, the described first colourity white light LEDs 21, the second colourity white light LEDs 22 and the 3rd colourity white light LEDs 23 are that cycle arrangement is laid in regular turn, that is the white light LEDs of three different colourities is that one group of ground is arranged in regular turn; Wherein, the 21 common connections one of the first colourity white light LEDs are circuit loop independently, the second colourity white light LEDs, 22 common another independently circuit loops that connect, and the 3rd colourity white light LEDs 23 connects another independently circuit loop again; When feeding electric current, get so that the LED of these three kinds of colourities launches light into LGP 1, in LGP 1, to form mixed light.With Specifications's, the present invention can change photochromic respectively by controlling the magnitude of current size that feeds the first colourity white light LEDs 21, the second colourity white light LEDs 22 and/or the 3rd colourity white light LEDs 23 respectively, make LGP show different colourity, and the difference of this colourity can be finely tuned change between the different colourities of described white light LEDs.
Shown in Figure 3 is to show another embodiment of the present invention, can lay the first colourity white light LEDs 21 and the second colourity white light LEDs 22 that includes two kinds of different colourities in the relative both sides of LGP 1 respectively, those LED can lay equidistantly, also can not lay equidistantly; The first colourity white light LEDs 21 and the second colourity white light LEDs 22 are to be staggered to arrange; Or the white light LEDs of three kinds of colourities arranges in aforesaid mode, or adopts to mix and arrange; The white light LEDs of described different colourities is respectively done for oneself one group, and connects a circuit loop independently respectively; When feeding the different magnitudes of current, changed the light colourity of injecting in the LGP.Moreover, the white light LEDs of identical colourity can be located at symmetrical position, LGP both sides, also the white light LEDs of different colourities can be located at symmetrical position, LGP both sides.
The white light LEDs of aforementioned several different colourities, also can be arranged in three limits of a LGP 1 as illustrated in fig. 4, also can be arranged in four limits (as shown in Figure 5) of a LGP, and the white light LEDs of identical colourity connects a circuit loop independently separately, also can reach the requirement of aforementioned identical inching colourity.
The above only is in order to explain preferred embodiment of the present invention; be not that the attempt tool is to do any formal restriction to the present invention; be with, all have in following any modification or change of doing relevant the present invention of identical creation spirit, all must be included in the intent of the present invention protection category.
Claims (10)
1. the backlight module of a fine-tuning colourity comprises: a LGP; Be located at the side of this LGP, in order to ray cast is entered the plural white light LEDs of this LGP, described white light LEDs is characterized in that including two or more different colourities, and the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively.
2. the backlight module of fine-tuning colourity according to claim 1 is characterized in that: the white light LEDs of described different colourities is to be staggered this LGP of being located at with arranging.
3. the backlight module of fine-tuning colourity according to claim 1 and 2, it is characterized in that: described white light LEDs is provided in a side of more than the both sides of this LGP.
4. the backlight module of fine-tuning colourity according to claim 2 is characterized in that: the white light LEDs of described different colourities is provided in a side of the symmetric position of the relative both sides of LGP.
5. the backlight module of fine-tuning colourity according to claim 2 is characterized in that: the white light LEDs of described identical colourity is provided in a side of the symmetric position of the relative both sides of LGP.
6. the light mixing method of a fine-tuning colourity backlight module, realize by following steps:
Be located at the side of LGP in order to the plural white light LEDs that ray cast is entered this LGP;
Described white light LEDs includes two or more different colourities, and the white light LEDs of identical colourity is one group and connects a circuit loop independently respectively;
When feeding electric current, the white light LEDs of different colourities produces different photochromic injecting in the LGP respectively, and forms mixed light in this LGP;
By the control magnitude of current, then can between a specific colourity, fine setting change photochromic.
7. the light mixing method of fine-tuning colourity backlight module according to claim 6 is characterized in that: the white light LEDs of described different colourities is to be staggered this LGP of being located at with arranging.
8. according to the light mixing method of claim 6 or 7 described fine-tuning colourity backlight modules, it is characterized in that: described white light LEDs is provided in a side of more than the both sides of this LGP.
9. the light mixing method of fine-tuning colourity backlight module according to claim 7 is characterized in that: the white light LEDs of described different colourities is provided in a side of the symmetric position of the relative both sides of LGP.
10. the light mixing method of fine-tuning colourity backlight module according to claim 7 is characterized in that: the white light LEDs of described identical colourity is provided in a side of the symmetric position of the relative both sides of LGP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100505503A CN101876409A (en) | 2009-04-30 | 2009-04-30 | Backlight module capable of fine-tuning chromaticity and light mixing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100505503A CN101876409A (en) | 2009-04-30 | 2009-04-30 | Backlight module capable of fine-tuning chromaticity and light mixing method thereof |
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| CN101876409A true CN101876409A (en) | 2010-11-03 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853283A (en) * | 2011-06-30 | 2013-01-02 | 展晶科技(深圳)有限公司 | Light emitting diode lighting device |
| CN103225788A (en) * | 2013-04-27 | 2013-07-31 | 华南理工大学 | LED light source improvement method and LED light source |
| CN103234149A (en) * | 2013-03-29 | 2013-08-07 | 京东方科技集团股份有限公司 | Backlight module, liquid crystal display and backlight drive control method |
| CN103939779A (en) * | 2014-04-18 | 2014-07-23 | 江苏新广联绿色照明工程有限公司 | LED panel lamp allowing color temperature and color rendering index to be adjustable |
| CN104036734A (en) * | 2013-03-05 | 2014-09-10 | 元太科技工业股份有限公司 | Light emitting module and electronic device |
| CN104676389A (en) * | 2015-03-26 | 2015-06-03 | 京东方科技集团股份有限公司 | Backlight module, and control method and display device thereof |
| CN104914623A (en) * | 2015-06-19 | 2015-09-16 | 深圳市华星光电技术有限公司 | Light-emitting unit and backlight source with light-emitting units |
| WO2017096684A1 (en) * | 2015-12-10 | 2017-06-15 | 武汉华星光电技术有限公司 | Circuit for adjusting color temperature of led backlight and display device having same |
| WO2017107269A1 (en) * | 2015-12-22 | 2017-06-29 | 武汉华星光电技术有限公司 | Backlight module, liquid crystal display device and backlight adjustment method therefor |
| US10113944B2 (en) | 2016-05-26 | 2018-10-30 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Circuit board testing apparatus and circuit board testing method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853283A (en) * | 2011-06-30 | 2013-01-02 | 展晶科技(深圳)有限公司 | Light emitting diode lighting device |
| CN104036734A (en) * | 2013-03-05 | 2014-09-10 | 元太科技工业股份有限公司 | Light emitting module and electronic device |
| CN104036734B (en) * | 2013-03-05 | 2017-01-18 | 元太科技工业股份有限公司 | Light emitting module and electronic device |
| US9307609B2 (en) | 2013-03-05 | 2016-04-05 | E Ink Holdings Inc. | Electronic device and light-emitting module |
| US9726930B2 (en) | 2013-03-29 | 2017-08-08 | Boe Technology Group Co., Ltd. | Backlight module with two sets of LEDs, liquid crystal display and control method for driving the backlight module |
| CN103234149A (en) * | 2013-03-29 | 2013-08-07 | 京东方科技集团股份有限公司 | Backlight module, liquid crystal display and backlight drive control method |
| CN103225788A (en) * | 2013-04-27 | 2013-07-31 | 华南理工大学 | LED light source improvement method and LED light source |
| CN103939779A (en) * | 2014-04-18 | 2014-07-23 | 江苏新广联绿色照明工程有限公司 | LED panel lamp allowing color temperature and color rendering index to be adjustable |
| CN104676389A (en) * | 2015-03-26 | 2015-06-03 | 京东方科技集团股份有限公司 | Backlight module, and control method and display device thereof |
| CN104914623A (en) * | 2015-06-19 | 2015-09-16 | 深圳市华星光电技术有限公司 | Light-emitting unit and backlight source with light-emitting units |
| WO2016201779A1 (en) * | 2015-06-19 | 2016-12-22 | 深圳市华星光电技术有限公司 | Light-emitting unit and backlight source provided with light-emitting unit |
| US10437100B2 (en) | 2015-06-19 | 2019-10-08 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Light emitting unit and backlight having the same |
| WO2017096684A1 (en) * | 2015-12-10 | 2017-06-15 | 武汉华星光电技术有限公司 | Circuit for adjusting color temperature of led backlight and display device having same |
| US9886913B2 (en) | 2015-12-10 | 2018-02-06 | Wuhan China Star Optoelectronics Technology Co., Ltd | LED backlight color temperature adjustment circuit and display device having the same |
| WO2017107269A1 (en) * | 2015-12-22 | 2017-06-29 | 武汉华星光电技术有限公司 | Backlight module, liquid crystal display device and backlight adjustment method therefor |
| US10146088B2 (en) | 2015-12-22 | 2018-12-04 | Wuhan China Star Optoelectronics Technology Co., Ltd | Backlight module, liquid crystal display device and backlight adjustment method thereof |
| US10113944B2 (en) | 2016-05-26 | 2018-10-30 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Circuit board testing apparatus and circuit board testing method |
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Application publication date: 20101103 |