CN103032765A - Light source module, liquid crystal display device and neon lamp display device - Google Patents
Light source module, liquid crystal display device and neon lamp display device Download PDFInfo
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- CN103032765A CN103032765A CN2012105341728A CN201210534172A CN103032765A CN 103032765 A CN103032765 A CN 103032765A CN 2012105341728 A CN2012105341728 A CN 2012105341728A CN 201210534172 A CN201210534172 A CN 201210534172A CN 103032765 A CN103032765 A CN 103032765A
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Abstract
The invention belongs to an optical field and particularly relates to a light source module, a liquid crystal display device comprising the light source module, and a neon lamp display device comprising the light source module. The light source module comprises a light-emitting unit and a light guide board; the light guide board comprises a main body and lattice points arranged on the main body; a quantum dot material is doped in the lattice points; the quantum dot material is stimulated by light of a light-emitting unit to emit light with a specific wavelength. The display color gamut of the liquid crystal display device applying the light source module and the neon lamp display device can be greatly improved.
Description
Technical field
The invention belongs to optical field, be specifically related to a kind of light source module, the neon light display unit that comprises the liquid crystal indicator of this light source module and comprise this light source module.
Background technology
Liquid crystal itself is not luminous, therefore, adopts backlight module (Back Light Module) for liquid crystal panel provides evenly, the light source of high brightness in liquid crystal display device panel (LiquidCrystal Display Panel).In general, difference according to distribution of light sources position in the backlight module can be divided into backlight module side entrance back module and down straight aphototropism mode set, wherein, the light source in the side entrance back module is positioned at the side of display floater, and the light source in the down straight aphototropism mode set is positioned at the bottom of display floater.
The side entrance back module is assembled by assemblies such as light emitting source (Light Source), reflector plate (Reflector), LGP (Light Guide Plate), blooming piece and housings.Wherein, light emitting source adopts white light source usually, such as CCFL (ColdCathode Fluorescent Lamp, cold-cathode fluorescence lamp) or LED (LightEmitting Diode, light emitting diode); Be formed with site printing ink on the LGP, site printing ink spreads and reflects light emitting source, with positive ejaculation of light guiding backlight module of side incident LGP.
In the prior art, the backlight module that adopts in the liquid crystal indicator, or the shown color that goes out of lighting module in the lighting device normally reach specific display effect by the adjustment to fluorescent material default in the light emitting source.At present, people are more and more higher to the color requirement of display unit, also wish simultaneously to reach higher colour gamut.According to NTSC CIE1931 standard, OLED display unit device colour gamut generally surpasses 100% at present; Concerning liquid crystal indicator, be generally 72% as the colour gamut of TV, be generally 50% as the colour gamut of panel computer.For the colour gamut that makes liquid crystal indicator surpasses 100%, the LED that formed by RGB three chips that adopt more, perhaps adopt by independent R, G, B three LEDs and form one group of LED, but this mode generally needs certain light mixing distance, so usually only be used in the backlight module of straight-down negative, and be difficult to be applied in the side entrance back module; Simultaneously, this mode not only makes the cost of backlight module be multiplied, and also discomfort is fit to do the slimming design.
Summary of the invention
Technical problem to be solved by this invention is for above shortcomings in the prior art, a kind of light source module is provided, this light source module adopts the printing ink that is doped with quanta point material to form light guide plate mesh point, so that use the liquid crystal indicator of this light source module and the demonstration colour gamut of neon light display unit has obtained significantly improving.
The technical scheme that solution the technology of the present invention problem adopts is this light source module, comprise luminescence unit and LGP, described LGP comprises main body and is arranged at site on the main body, be doped with quanta point material in the described site, described quanta point material is excited by the light of described luminescence unit and sends the light of specific wavelength.
Preferably, the wavelength of the light that sends of described luminescence unit is less than the be stimulated wavelength of light of the specific wavelength that sends of described quantum dot.
Preferably, described luminescence unit adopts blue light source, and described quanta point material is excited by blue light source and the light of the specific wavelength that sends comprises at least a in ruddiness, green glow, blue light or the gold-tinted.
Preferably, described blue light source comprises at least one LED lamp bar, CCFL or EEFL, and described at least one LED lamp bar, CCFL or EEFL are arranged at a side or many sides of described LGP.
Preferably, described light source module also comprises drive circuit and control circuit, and described drive circuit is electrically connected with described LED lamp bar and described control circuit respectively, wherein:
Described drive circuit for described LED lamp bar provides constant drive current, and carries out brightness regulation according to the control signal of described control circuit to the LED group;
Described control circuit is used for generating as required the control signal that makes the formation of described LED group set color, and this control signal is sent to described drive circuit.
Preferably, described LED lamp bar comprises at least one LED group, and each LED group comprises and be arranged at intervals with successively a plurality of LED that described a plurality of LED are connected in series;
Described drive circuit comprises that at least one drives passage, and each passage is electrically connected with a LED group;
Control signal in the described control module comprises at least one pwm signal, or according to the control command word of the communication protocol of SPI, IIC transmission, described each pwm signal or control command word send to one and drive passage.
Preferably, described LED lamp bar also comprises substrate, and a plurality of described LED are disposed on the described substrate, and described substrate is white towards the one side of described LED.
Preferably, described main body is tabular, and described main body adopts transparent material to form; Described site is arranged in the described LGP back side or front by the filling rate of setting, and that the shape of described site adopts is square, circle or hexagon.
Preferably, described transparent material is Merlon or polymethyl methacrylate; Described site comprises printing ink and is doped in scattering diluent in the printing ink that described quanta point material is doped in the described printing ink.
A kind of liquid crystal indicator comprises liquid crystal panel and backlight module, and described backlight module comprises above-mentioned light source module.
In this liquid crystal indicator, described light guide plate main body have front that a bottom surface, is oppositely arranged with the bottom surface, with the side that bottom surface and exiting surface link to each other, described at least one side is the incidence surface of LGP; Described site is arranged at the bottom surface of LGP, and dot density or size increase to the side surface direction that is oppositely arranged with incidence surface successively from incidence surface; Described quanta point material Uniform Doped is in the printing ink of described site.
Preferably, described quanta point material Uniform Doped is in described printing ink, and described quanta point material comprises red quanta point material, green quanta point material, blue quanta point material or yellow quanta point material at least two kinds.
Preferably, described backlight module also comprises and is arranged at making the light diffusion or making the blooming piece of light blast of described LGP top, and the below of described LGP is provided with the end reflector plate that makes light reflection.
A kind of neon light display unit comprises the glory module, and described glory module adopts above-mentioned light source module.
In this neon light display unit, described light guide plate main body have front that a bottom surface, is oppositely arranged with the bottom surface, with bottom surface and the positive side that links to each other, described at least one side is the incidence surface of LGP; Described site is arranged at front and/or the bottom surface of LGP, even or inhomogeneous being doped in the described printing ink of described quanta point material.
Preferably, in described LGP, described quanta point material comprises at least a of red quanta point material, green quanta point material, blue quanta point material or yellow quanta point material.
The invention has the beneficial effects as follows: this light source module not only can be used for field of liquid crystal display, solves the side entering type white light LED backlight and cooperates the low and low technical problem of penetrance of colour gamut with color membrane substrates, and can greatly improve the colour gamut of liquid crystal indicator; Simultaneously, can also be applied to lighting field, adopt simple structure just can realize the neon light display effect of different colours.
Description of drawings
Fig. 1 is the structure cut-away view of light source module in the embodiment of the invention 1;
Fig. 2 is the schematic rear view of LGP in the embodiment of the invention 1;
Fig. 3 is the easy structure cutaway view of liquid crystal indicator in the embodiment of the invention 1;
Fig. 4 is the structured flowchart of neon light display unit in the embodiment of the invention 2;
Fig. 5 is the schematic diagram of LED lamp bar in the embodiment of the invention 2;
Fig. 6 is the schematic rear view of LGP in the embodiment of the invention 2;
Fig. 7 is the structure cut-away view of light source module in the embodiment of the invention 2.
Among the figure: the 1-LGP; The 101-main body; The 102-site; The 103-quanta point material; The 104-back side; 105-is positive; The 106-side; The 2-luminescence unit; 201-LED; The 202-substrate; The 203-connector; The 3-blooming piece; Reflector plate at the bottom of the 4-; The 5-drive circuit; The 6-control circuit; The 7-color membrane substrates; The 8-array base palte; The 9-liquid crystal layer; The 10-drive circuit; The 11-control circuit.
The specific embodiment
For making those skilled in the art understand better technical scheme of the present invention, below in conjunction with the drawings and specific embodiments light source module of the present invention, the neon light display unit that comprises the liquid crystal indicator of this light source module and comprise this light source module are described in further detail.
Technical conceive of the present invention is: quantum dot (Quantum Dot, QD) material is a kind of accurate zero-dimension nano semiconductive luminescent materials, and typical quanta point material comprises luminous nucleon, is formed at the outer semiconductor shell of described luminous nucleon and is formed at the outer organic ligand of semiconductor shell.Quanta point material can send visible light after absorbing certain energy, this quantum dot excitation energy comprises optical excitation energy and electric excitation energy.The optical excitation energy namely adopts light activated mode to make quantum dot light emitting, compare light-emitting phosphor, quantum dot light emitting has quantum efficiency height, emission spectrum half-peak width, only need just can accurately control by the replacing quanta point material or by the adjustment quantum dot size and inspire the different wave length line, thereby obtain the visible light of different colours.
A kind of light source module, comprise luminescence unit and LGP, described LGP comprises main body and is arranged at site on the main body, is doped with quanta point material in the described site, and described quanta point material is excited by the light of described luminescence unit and sends the light of specific wavelength.
A kind of liquid crystal indicator comprises liquid crystal panel and backlight module, and described backlight module comprises above-mentioned light source module.
A kind of neon light display unit comprises the glory module, and described glory module adopts above-mentioned light source module.
Embodiment 1:
Present embodiment relates to a kind of light source module, and this light source module is applied in the field of liquid crystal display, as backlight module and the liquid crystal indicator that comprises this backlight module.
As shown in Figure 1, this light source module comprises LGP 1(Light Guide Plate, be called for short LGP) and the luminescence unit 2 that is arranged at described LGP one side, described LGP 1 comprises main body 101 and is arranged at site 102 on the main body, be doped with quanta point material 103 in the described site 102, described quanta point material is excited by the light of described luminescence unit 2 and sends the light of specific wavelength.
Wherein, the main body in this LGP 1 is tabular, and described main body adopts transparent material to form, and described transparent material is PC(Polycarbonate, Merlon) or PMMA(Polymethyl Methacrylate, polymethyl methacrylate); Described site comprises printing ink and is doped in scattering diluent in the printing ink, and described quanta point material 103 is doped in the described printing ink, and the shape of described site can for square, circle or hexagon, can certainly for other shapes, not be restricted at this.Described site is arranged at bottom surface at described light guide plate main body by the filling rate of setting.
In order to guarantee that the quanta point material in the printing ink of site can effectively be excited, the wavelength of the light of described luminescence unit is less than the be stimulated wavelength of light of the specific wavelength that sends of described quanta point material.In the present embodiment, described luminescence unit adopts blue light source, blue light source can be LED, CCFL or EEFL (External ElectrodeFluorescent Lamp, external electrode fluorescence lamp) etc., the quantity of light source can be one or more, can be distributed in a side or many sides of LGP.At present, the blue-light LED chip wavelength of volume production concentrates on the 440-455nm scope, and half-peak breadth is 20nm, and the wavelength of light of blue light source is shorter, and the efficient of excitation quantum point is higher.
As required, described quanta point material is excited by blue light source and the light of the specific wavelength that sends comprises at least a in ruddiness, green glow, blue light or the gold-tinted.According to the different demands of user, can regulate the proportioning of the different quanta point material that mixes in the printing ink and different quanta point material or the quanta point material of different size.An outstanding advantages of quanta point material is, even commaterial only by adjusting the size of quanta point material, just can accurately be controlled the emission wavelength of quanta point material, thereby obtain the visible light of different colours.Therefore, in actual applications, can according to the characteristics of luminescence of quanta point material, such as half-peak breadth or emission wavelength, by changing quanta point material, perhaps, adopt different process to synthesize the light that the same quanta point material obtains different colours.As a kind of example, described quanta point material is red quanta point material, green quanta point material or blue quanta point material.A kind ofly have CdSe/ZnS(luminous nucleon/semiconductor shell) in the quanta point material of structure, the diameter of the luminous nucleon of described red quanta point material is 5.0-5.5nm, the diameter of the luminous nucleon of described green quanta point material is 3.0-3.5nm, and the diameter of the luminous nucleon of described blue quanta point material is 2.0-2.5nm.
A kind of light source module of present embodiment that adopts is as the liquid crystal indicator of backlight module.Backlight module in the present embodiment is arranged at the side of liquid crystal panel, and namely this liquid crystal indicator is side-edge type backlight.
In this liquid crystal indicator, the side entrance back unit comprises LGP, described LGP comprises light guide plate main body, light guide plate main body have front that a bottom surface, is oppositely arranged with the bottom surface, with the side that bottom surface and exiting surface link to each other, described at least one side is the incidence surface of LGP.As shown in Figure 3, when adopting this light source module to form this backlight module, the front 105 of LGP is the front of backlight module LGP in the light source module, and described front is the exiting surface of LGP, also is provided with blooming piece 3 above this exiting surface; The back side 104 of LGP is the bottom surface of backlight module LGP in the light source module, also is provided with end reflector plate 4 below this bottom surface; A side 106 of LGP is the incidence surface of backlight module LGP in the described light source module.Wherein, end reflector plate 4 is used for entering the light reflection of LGP 1 to exiting surface and the ejaculation of LGP, and blooming piece 3 is used for making the light diffusion of penetrating from the LGP exiting surface, and its light luminance is improved, and perhaps makes the uniformity raising of light.In the present embodiment, in the LGP of this backlight module, quanta point material is dispersed in the printing ink, to satisfy uniformity outstanding in the liquid crystal panel.Be doped with the printing ink of quanta point material, by printing or the mode of inkjet printing, according to certain filling rate, be formed on bottom surface of light guide plate.As shown in Figure 2, in order to prevent colour cast and to increase light-emitting uniformity, described site presents by dredging to close arrangement to the side surface direction (namely from the dipped beam side to the distance light side) that is oppositely arranged with incidence surface from the incidence surface of LGP, concrete arrangement can shine briliancy and the uniformity in the liquid crystal panel according to LGP, obtains through test of many times.
Luminescence unit in the present embodiment is formed by LED lamp bar, and described LED lamp bar comprises at least one LED group, and each LED group comprises and be arranged at intervals with successively a plurality of LED that described a plurality of LED are connected in series.Also comprise drive circuit and control circuit in this backlight module, described control circuit is used for generating as required the control signal that makes the formation of described LED group set color, and this control signal is sent to described drive circuit; Described drive circuit for described LED lamp bar provides constant drive current, and carries out brightness regulation according to the control signal of described control circuit to the LED group.
In liquid crystal indicator, also comprise the liquid crystal layer 9 between color membrane substrates 7, array base palte 8 and color membrane substrates and the array base palte, wherein, be provided with filter coating in the color membrane substrates 7; Setting and the filter coating of the quanta point material in the light guide plate mesh point of described light source module are complementary.Concrete, when the quanta point material of selecting to be doped in the printing ink of site, should consider the characteristics of luminescence of quanta point material, such as spectrum half-peak breadth, luminous crest and emission wavelength etc., to mate according to the color of the color filter of color membrane substrates in the liquid crystal indicator and the particular color that the liquid crystal panel needs show.General, quanta point material luminescent spectrum half-peak breadth is narrower, and excitation is higher, and the color displays effect of liquid crystal indicator is better; Simultaneously, the luminous crest of quanta point material, transmitance according to color membrane substrates Green color filter, red color filter is adjusted, so that its mode that as far as possible near the zone of high permeability, can take to adjust the size of quanta point material this moment is come the control wave peak position; By adjusting the proportioning of quanta point material in printing ink, can change the wave amplitude size that quantum dot sends light.When the color filter in the color membrane substrates is not identical, the quanta point material that arranges in the site of LGP in backlight module is not identical yet, namely, in order to make display panels realize the demonstration of setpoint color, the colour filter color of color filter and the matching in colour of visible light that quanta point material sends are closed.
At present, in general liquid crystal indicator, the color filter in the color membrane substrates is generally red, green, blue three color films.In the present embodiment, luminescence unit adopts blue light source (blue spectrum as shown in Figure 3), therefore, need be doped into the quanta point material of energy green-emitting visible light and red visible light in the light guide plate mesh point printing ink.Same, select suitable blue-ray LED emission wavelength, also need to mate according to blue color filter in the color membrane substrates, to see through more light energies.
Identical with control and type of drive in the at present general liquid crystal indicator, in the present embodiment, according to image to be shown or video and graphic the luminescence unit in the backlight module is controlled and driven.The communication process of light is in the backlight module: luminescence unit 2 sends blue light source, blue light source is from incidence surface (being side 106) the incident LGP 1 of LGP, and in transparent light guide plate main body 101, propagate, wherein, be mapped to the blue light light on the site 102, owing to contain quanta point material 103 in the printing ink of formation site, therefore, part blue light light is absorbed by quanta point material, thereby excites the quanta point material in the printing ink to send redness or green visible light; Another part blue light is together come by the scattering diluent scattering in the printing ink with red visible light or the green visible light of being excited to send, propagate into and become colored area source on the end reflector plate 4, colored area source is reflexed to the exiting surface (i.e. front 105) of LGP by end reflector plate 4, and (white-light spectrum is decomposed into R to be mixed into white light, G, three crests of B, R, G, the B spectrogram as shown in Figure 3), the white light that forms becomes more even or brighter area source by the blooming piece 3 of the top of LGP exiting surface, cooperate the color filter in the color membrane substrates, make normally show image of liquid crystal panel, and make liquid crystal panel reach the better colored effect that shows.
When the color filter of color membrane substrates in the liquid crystal indicator changes, for example: when the color filter color of liquid crystal indicator comprises red, green, blue, yellow four colors, then corresponding, be formed on the quanta point material that should be doped with the visible light of being excited to send red, green, yellow three kinds of colors in the site printing ink on the LGP 1; And for example: when the color film of liquid crystal indicator is red, green, blue, white four colors, then is formed in the site printing ink on the LGP 1 and should be doped with the quanta point material of being excited to send three kinds of colors of red, green, blue.According to this principle, if when the color filter of liquid crystal indicator is the color of other a plurality of colors, then be excited to send the quanta point material of different colours according to mixing in the site printing ink of actual conditions on LGP.
In the present embodiment, by doped quantum dot material in the site of LGP, the visible light ray that makes it to send matches with the color membrane substrates of liquid crystal indicator, can obtain than fluorescent material LED as the better color displays effect of backlight module, and make colour gamut obtain surpassing 50% lifting.
Light source module in the present embodiment is particularly useful for using as the side entrance back module in the liquid crystal indicator.
It will be appreciated that, light source module among the present invention, not only be applicable to liquid crystal indicator, also be applicable to other display unit, such as needing the light source module that any product or parts with Presentation Function such as Electronic Paper, oled panel, DPF, mobile phone, panel computer of colour or white light source are provided.Because displaying principle and liquid crystal indicator are similar, therefore not to repeat here.
Embodiment 2:
Present embodiment relates to a kind of light source module, and this light source module is applied to lighting field, specifically is applied to decorate do the neon light demonstration in the demonstration field.
Traditional neon light is made through firing by glass, glass tube can bend to arbitrary shape, be filled with different inert gases in the dissimilar glass tubes, the electrode tip that relies on the glass tube two ends to arrange, under high voltage electric field, the rare inert gas in the glass lamp is hit combustion, thereby obtain glory display effect colorful, multiple color.
But, may produce environmental pollution owing to traditional neon light heavy metal such as mercurous grade, and adopt high voltage electric field to bring easily potential safety hazard.Therefore, along with the development of Display Technique, the important task that the realization neon light shows is transferred to gradually and is adopted the LED lamp to be used as light source, because operating voltage and the operating current of LED all are low-voltage DCs, so safer.LED is a kind of environmental protection cold light source, is applied to lighting field, has following advantage: the not mercurous heavy metal that waits among the 1.LED can not work the mischief to environment; 2. as a kind of solid light source, the possibility that does not exist cracked rear fragment to hurt sb.'s feelings; 3. as a kind of cold light source, even run into because of carelessness, the phenomenons such as scald can not appear yet.In addition, LED is spot light, and by the line source that these a plurality of spot lights form, each spot light wherein is controlled, so can by the control of each spot light being realized the variation of illumination, obtain more gorgeous illuminating effect.But present rainbow multicolour shows, generally is to select the led light source of different colours to obtain corresponding multiple color.
In the present embodiment, adopt the light source module as the glory module, and structure and the control of luminescence unit in the corresponding change light source module, suitably adjust simultaneously the setting of quanta point material in the LGP wherein, thereby obtain more frivolous neon light.
Concrete, the difference of the light source module in the present embodiment among light source module and the embodiment 1 is, the site can arrange the subregion flexibly, send the quanta point material of solid color visible light or send the position that is doped in the LGP of multiple color visible light different, and quanta point material can also can inhomogeneously mix by Uniform Doped in the printing ink of site.In LGP, add different quanta point materials, adopt single blue led light source, can obtain the neon light of different colours; And add different quanta point materials at the diverse location of LGP, can in the diverse location of same LGP, obtain different colors.
In the present embodiment, show the color that needs are set according to neon light, can regulate the position of site in LGP that is doped with different quanta point materials, the different pattern that consists of to obtain different colours; Also can regulate kind and the size of the quanta point material that mixes in the printing ink, to obtain the visible light of different colours; Simultaneously, can also regulate total amount or the ratio of quanta point material in each site, thereby in the situation of only using the blue led light source, realize the effect of the neon light demonstration of multiple color.Show red visible light such as needs, then only need to be doped into the quanta point material of being excited to send red visible light in the printing ink, and all absorbed the last red visible light that is excited and sends that only shows by quanta point material in the printing ink as the energy of the blue light source of light emitting source.
As shown in Figure 4, the neon light display unit in the present embodiment mainly is comprised of with control circuit 6 four parts luminescence unit 2, LGP 1, drive circuit 5, and described luminescence unit, drive circuit are electrically connected successively with control circuit.Wherein: luminescence unit 2 is light emitting sources of neon light display unit, and for described neon light display unit provides light source, its light source irradiation that sends excites quanta point material in the light guide plate mesh point 102 to send the visible light of different colours to LGP 1.Control circuit 11 and drive circuit 10 cooperate to be realized providing control signal to luminescence unit 2, and drive circuit provides constant drive current for luminescence unit, and according to the control signal of described control circuit luminescence unit is carried out brightness regulation; Control circuit is used for generating as required makes described LGP form the control signal that neon light shows.
Concrete, as shown in Figure 5, luminescence unit 2 adopts LED lamp bar, and LED lamp bar comprises at least one LED group, and each LED group comprises successively a plurality of LED201 of interval setting, and described a plurality of LED are connected in series; The LED group that a plurality of LED form is pooled in the connector 203.Described LED lamp bar also comprises substrate 202, and a plurality of described LED201 are disposed on the described substrate, also comprises on the substrate making the circuit that is electrically connected between each LED.Wherein, the spacing in the LED lamp bar between each LED is by determining behind the optical simulation, to guarantee not having the firefly phenomenon to be advisable at the light inlet place of LGP 1.In the LED lamp bar, described substrate 202 is white towards the one side of described LED, to guarantee and the light that scatters on the substrate can be carried out secondary reflection that the light that LED is sent is fully used.
In the present embodiment, luminescence unit 2 adopts the light source that blue led lamp bar shows as neon light.The number of LED on the LED lamp bar is not done restriction, and each LED lamp both positive and negative polarity joins end to end, and becomes a LED group according to series system; Positive pole and the negative pole of LED group are connected respectively on the respective pin of connector 203, are realized the LED group that is collected on it is driven by drive circuit.Each LED group can be controlled separately by drive circuit, realizes the adjusting of brightness under the effect of the control signal that control circuit 11 sends.
Shown in Fig. 6,7, in the present embodiment, it is the bottom surface that described light guide plate main body has a back side 104(), a front 105 that is oppositely arranged with the back side 104, with the back side and the positive side that links to each other, described at least one side is the incidence surface of LGP; Described site is arranged at front and/or the back side of LGP, the color effect that shows for strengthening neon light, and the LGP 1 here is provided with site 102 at its back side and front.Wherein, main body 101 adopts transparent material to form, light can carry out multiple total reflection therein, thereby the light that makes incident penetrates from the gap, site of the back side 104 of LGP or positive 105, the effect that is LGP 2 is the line source that LED lamp bar sends is disperseed, to be converted to area source.In the site at LGP front or the back side, be added with at least a quanta point material, quanta point material wherein is subjected to the blue-light excited of incident and sends the visible light of other colors.
Drive circuit 10 is mainly used in providing drive current to LED lamp bar.Drive circuit comprises that at least one drives passage, and each passage is electrically connected with a LED group in the LED lamp bar, organizes the independent adjusting of brightness to realize each LED, and each passage wherein all can be controlled separately.Drive circuit 10 is after the control signal that receives control circuit 11, according to the drive current adjustment of control signal to each passage, for the LED of each passage group provides constant drive current, realization shows so that described LGP forms required neon light the bright dark control of coupled LED group or the adjusting of LED brightness.
In the neon light display unit of present embodiment, by in LGP, adding different quanta point materials, reach and use single blue led light source, just can realize the effect that the neon light of different colours shows, thereby avoid to adopt the led light source of different colours to obtain the limitation of the neon light illumination of multiple color.
Light source module provided by the invention not only can be used for field of liquid crystal display, solves the side entering type white light LED backlight and cooperates the low and low technical problem of penetrance of colour gamut with color membrane substrates, and can greatly improve the colour gamut of liquid crystal indicator; Simultaneously, can also be applied to lighting field, adopt simple structure just can realize different neon light display effects.
Be understandable that above embodiment only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.
Claims (12)
1. light source module, comprise luminescence unit and LGP, it is characterized in that described LGP comprises main body and is arranged at site on the main body, be doped with quanta point material in the described site, described quanta point material is excited by the light of described luminescence unit and sends the light of specific wavelength.
2. light source module according to claim 1 is characterized in that, the wavelength of the light that described luminescence unit sends is less than the be stimulated wavelength of light of the specific wavelength that sends of described quantum dot.
3. light source module according to claim 2 is characterized in that, described luminescence unit adopts blue light source, and described quanta point material is excited by blue light source and the light of the specific wavelength that sends comprises at least a in ruddiness, green glow, blue light or the gold-tinted.
4. light source module according to claim 3 is characterized in that, described blue light source comprises at least one LED lamp bar, CCFL or EEFL, and described at least one LED lamp bar, CCFL or EEFL are arranged at a side or many sides of described LGP.
5. light source module according to claim 4 is characterized in that, described main body is tabular, and described main body adopts transparent material to form; Described site is arranged in the described LGP back side or front by the filling rate of setting, and that the shape of described site adopts is square, circle or hexagon.
6. light source module according to claim 5 is characterized in that, described transparent material is Merlon or polymethyl methacrylate; Described site comprises printing ink and is doped in scattering diluent in the printing ink that described quanta point material is doped in the described printing ink.
7. a liquid crystal indicator is characterized in that, comprises the arbitrary described light source module of claim 1-6.
8. liquid crystal indicator according to claim 7 is characterized in that, described light guide plate main body have front that a bottom surface, is oppositely arranged with the bottom surface, with the side that bottom surface and exiting surface link to each other, described at least one side is the incidence surface of LGP; Described site is arranged at the bottom surface of LGP, and dot density or size increase to the side surface direction that is oppositely arranged with incidence surface successively from incidence surface; Described quanta point material Uniform Doped is in the printing ink of described site.
9. liquid crystal indicator according to claim 8, it is characterized in that, described quanta point material Uniform Doped is in described printing ink, and described quanta point material comprises red quanta point material, green quanta point material, blue quanta point material or yellow quanta point material at least two kinds.
10. a neon light display unit comprises the glory module, it is characterized in that, described glory module adopts the arbitrary described light source module of claim 1-6.
11. neon light display unit according to claim 10 is characterized in that, described light guide plate main body have front that a bottom surface, is oppositely arranged with the bottom surface, with bottom surface and the positive side that links to each other, described at least one side is the incidence surface of LGP; Described site is arranged at front and/or the bottom surface of LGP, even or inhomogeneous being doped in the described printing ink of described quanta point material.
12. neon light display unit according to claim 11 is characterized in that, in described LGP, described quanta point material comprises at least a of red quanta point material, green quanta point material, blue quanta point material or yellow quanta point material.
Priority Applications (1)
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