CN101676598A - backlight and LCD - Google Patents
backlight and LCD Download PDFInfo
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- CN101676598A CN101676598A CN200810222522A CN200810222522A CN101676598A CN 101676598 A CN101676598 A CN 101676598A CN 200810222522 A CN200810222522 A CN 200810222522A CN 200810222522 A CN200810222522 A CN 200810222522A CN 101676598 A CN101676598 A CN 101676598A
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Abstract
The invention provides a backlight and LCD. The backlight includes backlight set and optical module group. The backlight set includes a first lamp set and a second lamp set, the first lamp set comprises a plurality of cold cathode fluorescent tubes or white light emitting diode, the second lamp set comprises a plurality of light emitting diodes with at least one monochrome, the first lamp set andthe second lamp set provide mixed uniform white light when they simultaneously lightened. The LCD includes the above backlight. The backlight and LCD provided by the invention are used to realize white balance by mixed use of various types of light sources CCFL tubes, white light emitting diode, or red, orange, yellow, green, blue, purple, or the like monochromatic light emitting diodes, etc. to realize white balance, in order to furthest reduce the cost of the LCD, enhance reliability of the LCD and enhance the appearance of a certain special color scope, on the basis of guaranteeing to improve the color gamut of the LCD.
Description
Technical field
The present invention relates to LCD (Liquid Crystal Display; Hereinafter to be referred as: LCD) technical field relates in particular to a kind of backlight and LCD.
Background technology
In the FPD field, picture display effect is particularly important for flat-panel display device.The performance quality of color is to weigh the important indicator of picture quality quality, and wherein colour gamut is one of important references standard.Because LCD is to adopt passive luminous mode, its color representation is subjected to many-sided influences such as fluorescent material, optical filter and backlight, therefore comprise traditional cold-cathode fluorescence lamp (hereinafter to be referred as: CCFL) colour gamut of backlight LCD is all lower.
Prior art generally adopts light emitting diode (Light Emitting Diode; Hereinafter to be referred as: LED) as backlight to solve the low defective of LCD colour gamut.Be specially, can send separately ruddiness LED (hereinafter to be referred as: send R LED), separately green glow LED (hereinafter to be referred as: G LED) and separately send blue light LED (hereinafter to be referred as: B LED) arrange according to desired location, the light mixing formation white light that utilizes R LED, G LED and B LED after energising, to send simultaneously, suitably adjust color film again, improve the colour gamut of backlight, for LCD provides light source.But, therefore increased the cost of whole LCD because LED self cost is higher.
Summary of the invention
The invention provides a kind of backlight and LCD, defectives such as the LCD colour gamut is low in order to solve in the prior art, cost height are implemented in and guarantee to improve on the basis of LCD colour gamut, reduce production costs.
The invention provides a kind of backlight, comprise backlight group and optics module, described backlight group comprises the first lamp group and the second lamp group, the described first lamp group comprises several cathode fluorescent tubes or white light-emitting diode, the described second lamp group comprises several at least a single color LEDs, mixes white light for described backlight provides when described first lamp group and the described second lamp group are lighted simultaneously.
The invention provides a kind of LCD, comprise backlight, described backlight comprises backlight group and optics module, described backlight group comprises the first lamp group and the second lamp group, the described first lamp group comprises several cathode fluorescent tubes or white light-emitting diode, the described second lamp group comprises several at least a single color LEDs, mixes white light for described backlight provides when described first lamp group and the described second lamp group are lighted simultaneously.
Backlight provided by the invention and LCD, use CCFL fluorescent tube, White LED by mixing, perhaps polytype light sources such as monochromatic LED such as red, orange, yellow, green, blue, blue, purple are in order to realize white balance, guarantee on the basis of improving the LCD colour gamut, reduce the cost of LCD to greatest extent, strengthen the reliability of LCD, and strengthen the expressive force of certain particular color scope.
Description of drawings
Fig. 1 is backlight group embodiment one structural representation in the backlight of the present invention;
Fig. 2 is backlight group embodiment two structural representations in the backlight of the present invention;
Fig. 3 is backlight group embodiment three structural representations in the backlight of the present invention;
Fig. 4 is the A-A direction structure schematic diagram of Fig. 3;
Fig. 5 is the B-B direction structure schematic diagram of Fig. 3;
Fig. 6 is backlight group embodiment four structural representations in the backlight of the present invention;
Fig. 7 is the A-A direction structure schematic diagram of Fig. 6;
Fig. 8 is the B-B direction structure schematic diagram of Fig. 6;
Fig. 9 is the C-C direction structure schematic diagram of Fig. 6;
Figure 10 is backlight group embodiment five structural representations in the backlight of the present invention.
The specific embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.
In the various embodiments of the present invention in order to improve the colour gamut of LCD, a kind of novel backlight source module is provided, mainly be that the backlight group in the backlight has been done improvement, on the basis of improving the LCD colour gamut, farthest reduced the LCD cost, specifically be improved to, change the structure that only improves the light source colour gamut in the existing backlight as the backlight group with single RGB LED combination, but become two parts to comprise the first lamp group and the second lamp group backlight component, wherein comprise several CCFL fluorescent tubes in the first lamp group or comprise several White LEDs that described White LED is meant that this LED can send white light separately when being lighted; And the second lamp group comprises several monochromatic LEDs.The characteristics of two groups of lamp groups are that CCFL or the White LED in the first lamp group can send white light separately under the situation of energising, but consider the restriction that is subjected to CCFL or certain factor of White LED self, phenomenon such as Huang or inclined to one side indigo plant partially appears in the white light that the first lamp group is sent, colour gamut is not high, therefore the embodiment of the invention is provided with in the backlight group to increase on the basis of the first lamp group again the second lamp group is set, the monochromatic LED that comprises in the second lamp group can send monochromatic light under the situation of energising, it is with after the white light that the first lamp group is sent mixes, and can improve the inclined to one side Huang of the white light that the first lamp group sends or phenomenon such as indigo plant partially; And pass to big electric current in the first lamp group, the second lamp group passes under the condition of little electric current, can guarantee to remain white light after light that the first lamp group and the second lamp group are sent mixes, the monochromatic light that single color LED sent only improves the white light that the first lamp group is sent, and does not remain white light but have influence on the light that the backlight group sent.For on the basis that guarantees mixed white light, strengthen the outstanding expressive ability of certain particular color scope, in the second lamp group at least a single color LED can be set according to the actual requirements, single color LEDs such as several R LED and B LED for example are set in the second lamp group.Characteristics according to two groups of lamp groups, when providing light source for LCD, guarantee that the first lamp group and the second lamp group are lighted simultaneously, the light that utilizes the first lamp group and the second lamp group to send is separately realized white balance jointly, blendes together equal white light and offers LCD as light source.Below with regard to the various combination form of the first lamp group and the second lamp group technical solution of the present invention is described in detail respectively.
Fig. 1 is backlight group embodiment one structural representation in the backlight of the present invention, present embodiment relates to the first lamp group and comprises the CCFL fluorescent tube, the second lamp group comprises the situation of monochromatic LED as direct-light-type backlight, CCFL fluorescent tube and monochromatic LED spacing rationally are set, and suitably control brightness separately, guarantee entire backlight source colour mixture and even light mixing, as shown in Figure 1, comprise the single color LED lamp group 11 that several be arranged in parallel as the second lamp group in the backlight group of direct-light-type backlight, single color LED lamp group 11 comprises several monochromatic LEDs 111 that evenly are provided with side by side, and each single color LED lamp group 11 evenly is provided with at interval; Several CCFL fluorescent tubes 13 that comprise in the first lamp group evenly and abreast are arranged on respectively in the middle of the single color LED lamp group 11, and the first lamp group and the second lamp group are arranged on optics module below and form direct-light-type backlight.
Fig. 2 is backlight group embodiment two structural representations in the backlight of the present invention, present embodiment relates to the first lamp group and comprises White LED, the second lamp group comprises the situation of monochromatic LED as direct-light-type backlight, White LED and monochromatic LED spacing rationally are set, and suitably control brightness separately, guarantee entire backlight source colour mixture and even light mixing, as shown in Figure 2, comprise the single color LED lamp group 11 that several be arranged in parallel as the second lamp group in the backlight group of direct-light-type backlight, single color LED lamp group 11 comprises several monochromatic LEDs 111 that evenly are provided with side by side, and each single color LED lamp group 11 evenly is provided with at interval; The first lamp group comprises the white light-emitting diode lamp group 12 that several be arranged in parallel, and white light-emitting diode lamp group 12 comprises several White LEDs 121 that evenly are provided with side by side, and single color LED lamp group 11 evenly is provided with at interval with white light-emitting diode lamp group 12; The below that the first lamp group and the second lamp group are arranged on the optics module forms direct-light-type backlight.Further, the first lamp group and the second lamp group can be co-located on the same printed circuit board.
Fig. 3 is backlight group embodiment three structural representations in the backlight of the present invention, present embodiment relates to the first lamp group and comprises the CCFL fluorescent tube, the second lamp group comprises the situation of monochromatic LED as side-light type back light, CCFL fluorescent tube and monochromatic LED spacing rationally are set, and suitably control brightness separately, guarantee entire backlight source colour mixture and even light mixing, as shown in Figure 3, as several CCFL fluorescent tubes 13 that evenly are provided with side by side that comprise in the first lamp group in the backlight group of side-light type back light, the second lamp group comprises several monochromatic LEDs 111 that several evenly are provided with side by side, and each single color LED lamp group 11 evenly is provided with at interval; The side that the first lamp group and the second lamp group are arranged on the optics module forms side-light type back light, comprises that further the first lamp group and the second lamp group are arranged on the printed circuit board and a side of being located at the optics module forms side-light type back light; Or first lamp group and the second lamp group both sides that are arranged on the optics module respectively form side-light type back light.Shown in Fig. 3 the embodiment that the first lamp group and the second lamp group are positioned at the both sides of optics module respectively, promptly a side is provided with CCFL fluorescent tube 13, opposite side is provided with monochromatic LED 111, Fig. 4 is the A-A direction structure schematic diagram of Fig. 3, as shown in Figure 4, several monochromatic LEDs 111 evenly are arranged on and form the second lamp group on the printed circuit board (PCB).Fig. 5 is the B-B direction structure schematic diagram of Fig. 3, as shown in Figure 5, comprise the first lamp group of CCFL fluorescent tube 13 and comprise that the second lamp group of monochromatic LED 111 is arranged on the both sides of optics module respectively that the optics module comprises backboard a, reflecting plate b, LGP c and light diffuser plate and prismatic lens combination d successively.Suitably control the monochromatic LED brightness value of chip separately, the monochromatic LED porch hot spot phenomenon that reduces LGP c takes place, and the brightness of choose reasonable CCFL lamp luminescence when guaranteeing that CCFL lights, guarantees the mixed light effect in entire backlight source.
Fig. 6 is backlight group embodiment four structural representations in the backlight of the present invention, present embodiment relates to the first lamp group and comprises White LED, the second lamp group comprises the situation of monochromatic LED as side-light type back light, White LED and monochromatic LED spacing rationally are set, and suitably control brightness separately, guarantee entire backlight source colour mixture and even light mixing, as shown in Figure 6, comprise the White LED 121 that several evenly are provided with side by side as the first lamp group in the backlight group of side-light type back light, the second lamp group comprises the monochromatic LED 111 that several evenly are provided with side by side, the side that the first lamp group and the second lamp group are arranged on the optics module forms side-light type back light, comprises that further the first lamp group and the second lamp group are arranged on the printed circuit board and a side of being located at the optics module forms side-light type back light; Or first lamp group and the second lamp group both sides that are arranged on the optics module respectively form side-light type back light.Shown in Fig. 6, the first lamp group and the second lamp group are arranged on the embodiment of the both sides of optics module respectively, promptly a side is provided with White LED 121, opposite side is provided with monochromatic LED 111, Fig. 7 is the A-A direction structure schematic diagram of Fig. 6, as shown in Figure 7, several monochromatic LEDs 111 evenly are arranged on and form the second lamp group on the printed circuit board (PCB).Fig. 8 is the B-B direction structure schematic diagram of Fig. 6, and as shown in Figure 8, several White LEDs 121 evenly are arranged on and form the second lamp group on the printed circuit board (PCB).Fig. 9 is the C-C direction structure schematic diagram of Fig. 6, as shown in Figure 9, comprise the first lamp group of White LED 121 and comprise that the second lamp group of monochromatic LED 111 is arranged on the both sides of optics module respectively that the optics module comprises backboard a, reflecting plate b, LGP c and light diffuser plate and prismatic lens combination d successively.Suitably control monochromatic LED and the White LED brightness value of chip separately, the LED porch hot spot phenomenon that reduces LGP c takes place, and will guarantee the mixed light effect in entire backlight source.White LED and monochromatic LED can be separately positioned on the different printing circuit board as mentioned above, also can be co-located on the same printed circuit board (PCB) and the side that is arranged on the optics module forms the sidelight source.Concrete set-up mode as shown in figure 10, several monochromatic LEDs 111 and White LED 121 evenly are provided with at interval on same printed circuit board (PCB).
More than the type of the white light-emitting diode that relates among each embodiment comprise that blue chip excites yellow fluorescent powder type, blue chip to excite red green fluorescence powder type and ultraviolet chip to excite in the RGB fluorescent material type any one; Single color LED comprises any one or its combination in the monochromatic LEDs such as redness, orange, yellow, green, cyan, blueness and purple.
A kind of LCD also is provided in the embodiment of the invention, the backlight that provides in the various embodiments described above is provided, be specially and comprise backlight, described backlight comprises backlight group and optics module, described backlight group comprises the first lamp group and the second lamp group, the described first lamp group comprises several cathode fluorescent tubes or white light-emitting diode, the described second lamp group comprises several at least a single color LEDs, mixes white light for described backlight provides when described first lamp group and the described second lamp group are lighted simultaneously.Wherein backlight can be a direct-light-type backlight, and also to be side-light type back light, when as side-light type back light, the first lamp group and the second lamp group can be positioned at homonymy or lay respectively at both sides.Mix by the light of monochromatic LED, realize white balance, make its light that sends still in the white light scope, and strengthened the particular color expressive force with CCFL that can send white light or White LED.
Backlight provided by the invention and LCD, use CCFL fluorescent tube, White LED by mixing, perhaps polytype light sources such as monochromatic LED such as red, orange, yellow, green, blue, blue, purple are in order to realize white balance, guarantee on the basis of improving the LCD colour gamut, reduce the cost of LCD to greatest extent, strengthen the reliability of LCD, and strengthen the expressive force of certain particular color scope.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (16)
1, a kind of backlight, comprise backlight group and optics module, it is characterized in that described backlight group comprises the first lamp group and the second lamp group, the described first lamp group comprises several cathode fluorescent tubes or white light-emitting diode, the described second lamp group comprises several at least a single color LEDs, mixes white light for described backlight provides when described first lamp group and the described second lamp group are lighted simultaneously.
2, backlight according to claim 1 is characterized in that the described second lamp group comprises the single color LED lamp group that several be arranged in parallel, and described single color LED lamp group comprises several single color LEDs that evenly are provided with side by side; Several cathode fluorescent tubes that comprise in the described first lamp group evenly and abreast are arranged on respectively in the middle of the described single color LED lamp group; The below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight.
3, backlight according to claim 1, it is characterized in that the described first lamp group comprises the cathode fluorescent tube that several evenly are provided with side by side, the described second lamp group comprises the single color LED that several evenly are provided with side by side, and described first lamp group and the described second lamp group are arranged on described optics module both sides respectively and form the side formation side-light type back light that side-light type back light or the described first lamp group and the described second lamp group are arranged on the printed circuit board and are arranged on described optics module.
4, backlight according to claim 1 is characterized in that the described second lamp group comprises the single color LED lamp group that several be arranged in parallel, and described single color LED lamp group comprises several single color LEDs that evenly are provided with side by side; The described first lamp group comprises the white light-emitting diode lamp group that several be arranged in parallel, and described white light-emitting diode lamp group comprises several white light-emitting diodes that evenly are provided with side by side; Described single color LED lamp group and described white light-emitting diode lamp group evenly are provided with at interval; The below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight.
5, backlight according to claim 4 is characterized in that below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight and comprises:
Described first lamp group and the described second lamp group are co-located on the same printed circuit board and are arranged on the below formation direct-light-type backlight of described optics module.
6, backlight according to claim 4, it is characterized in that the described first lamp group comprises the white light-emitting diode that several evenly are provided with side by side, the described second lamp group comprises the single color LED that several evenly are provided with side by side, and described first lamp group and the described second lamp group are arranged on described optics module both sides respectively and form the side formation side-light type back light that side-light type back light or the described first lamp group and the described second lamp group are arranged on the printed circuit board and are arranged on described optics module.
7, according to the described arbitrary backlight of claim 1 to 6, the type that it is characterized in that described white light-emitting diode comprises that blue chip excites yellow fluorescent powder type, blue chip to excite red green fluorescence powder type and ultraviolet chip to excite in the RGB fluorescent material type any one.
8,, it is characterized in that described single color LED comprises any one or its combination in redness, orange, yellow, green, cyan, blueness and the purple according to the described arbitrary backlight of claim 1 to 6.
9, a kind of LCD, comprise backlight, described backlight comprises backlight group and optics module, it is characterized in that described backlight group comprises the first lamp group and the second lamp group, the described first lamp group comprises several cathode fluorescent tubes or white light-emitting diode, the described second lamp group comprises several at least a single color LEDs, mixes white light for described backlight provides when described first lamp group and the described second lamp group are lighted simultaneously.
10, LCD according to claim 9 is characterized in that the described second lamp group comprises the single color LED lamp group that several be arranged in parallel, and described single color LED lamp group comprises several single color LEDs that evenly are provided with side by side; Several cathode fluorescent tubes that comprise in the described first lamp group evenly and abreast are arranged on respectively in the middle of the described single color LED lamp group; The below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight.
11, LCD according to claim 10, it is characterized in that the described first lamp group comprises the cathode fluorescent tube that several evenly are provided with side by side, the described second lamp group comprises the single color LED that several evenly are provided with side by side, and described first lamp group and the described second lamp group are arranged on described optics module both sides respectively and form the side formation side-light type back light that side-light type back light or the described first lamp group and the described second lamp group are arranged on the printed circuit board and are arranged on described optics module.
12, LCD according to claim 9 is characterized in that the described second lamp group comprises the single color LED lamp group that several be arranged in parallel, and described single color LED lamp group comprises several single color LEDs that evenly are provided with side by side; The described first lamp group comprises the white light-emitting diode lamp group that several be arranged in parallel, and described white light-emitting diode lamp group comprises several white light-emitting diodes that evenly are provided with side by side; Described single color LED lamp group and described white light-emitting diode lamp group evenly are provided with at interval; The below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight.
13, LCD according to claim 12 is characterized in that below that described first lamp group and the described second lamp group are arranged on described optics module forms direct-light-type backlight and comprises:
Described first lamp group and the described second lamp group are co-located on the same printed circuit board and are arranged on the below formation direct-light-type backlight of described optics module.
14, LCD according to claim 12, it is characterized in that the described first lamp group comprises the white light-emitting diode that several evenly are provided with side by side, the described second lamp group comprises the single color LED that several evenly are provided with side by side, and described first lamp group and the described second lamp group are arranged on described optics module both sides respectively and form the side formation side-light type back light that side-light type back light or the described first lamp group and the described second lamp group are arranged on the printed circuit board and are arranged on described optics module.
15, according to the described arbitrary LCD of claim 9 to 14, the type that it is characterized in that described white light-emitting diode comprises that blue chip excites yellow fluorescent powder type, blue chip to excite red green fluorescence powder type and ultraviolet chip to excite in the RGB fluorescent material type any one.
16,, it is characterized in that described single color LED comprises any one or its combination in redness, orange, yellow, green, cyan, blueness and the purple according to the described arbitrary LCD of claim 9 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222522A CN101676598A (en) | 2008-09-18 | 2008-09-18 | backlight and LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222522A CN101676598A (en) | 2008-09-18 | 2008-09-18 | backlight and LCD |
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| CN101676598A true CN101676598A (en) | 2010-03-24 |
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| CN200810222522A Pending CN101676598A (en) | 2008-09-18 | 2008-09-18 | backlight and LCD |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454909A (en) * | 2010-10-27 | 2012-05-16 | 展晶科技(深圳)有限公司 | LED lamp strip |
| CN102789090A (en) * | 2011-05-17 | 2012-11-21 | 康佳集团股份有限公司 | Novel direct-downward type light emitting liquid crystal screen |
| CN102901012A (en) * | 2012-10-30 | 2013-01-30 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN104793397A (en) * | 2015-03-16 | 2015-07-22 | 厦门天马微电子有限公司 | Liquid crystal display module and liquid crystal display device |
| CN110675741A (en) * | 2019-09-29 | 2020-01-10 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN115061312A (en) * | 2022-06-24 | 2022-09-16 | 黄山市展硕半导体科技有限公司 | Backlight source structure capable of simultaneously displaying white and red |
-
2008
- 2008-09-18 CN CN200810222522A patent/CN101676598A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454909A (en) * | 2010-10-27 | 2012-05-16 | 展晶科技(深圳)有限公司 | LED lamp strip |
| CN102789090A (en) * | 2011-05-17 | 2012-11-21 | 康佳集团股份有限公司 | Novel direct-downward type light emitting liquid crystal screen |
| CN102901012A (en) * | 2012-10-30 | 2013-01-30 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN104793397A (en) * | 2015-03-16 | 2015-07-22 | 厦门天马微电子有限公司 | Liquid crystal display module and liquid crystal display device |
| US9939681B2 (en) | 2015-03-16 | 2018-04-10 | Xiamen Tianma Micro-Electronics Co., Ltd. | Liquid crystal display module and liquid crystal display device |
| CN110675741A (en) * | 2019-09-29 | 2020-01-10 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN115061312A (en) * | 2022-06-24 | 2022-09-16 | 黄山市展硕半导体科技有限公司 | Backlight source structure capable of simultaneously displaying white and red |
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Open date: 20100324 |