CN209086609U - A kind of LCD backlight mould group - Google Patents

Abstract

The utility model provides a kind of LCD backlight mould group, backlight module is side entrance back module, back light is red LED, green LED, the color light source of blue led and White LED composition, red LED, quanta point material LED also can be used in green LED and blue led, or it is red using high frequency LED light source excitation, it is green, blue quantum dot lens, wherein the chip of the unification of two cores or the unification of three cores can be used in single LED in color light source, or individually using red, green, blue led, White LED, assorted LED chip has been both electrically connected with individual control circuit, by carrying out subregion to color light source, backlight area control function is realized to be independently controlled to each subregion.The utility model can realize that regionality lights backlight LED light source, compared with traditional LED white light full scheme of white field high brightness, can substantially reduce energy consumption.Extra high occasion is required in colour gamut, forms backlight using quantum dot LED light source, or the display for exciting using high frequency LED light source red, green, blue color quantum dot lens that can realize high colour gamut.

Description

A kind of LCD backlight mould group

Technical field

The utility model relates to technical field of LED display more particularly to a kind of LCD backlight mould groups.

Background technique

Currently, in technical field of liquid crystal display, HDR(High Dynamic Range) high dynamic range technology start it is more next It is used, high brightness and high colour gamut technology become the hot spot of display industry research more.High brightness to show that equipment is shown The picture shown more has luminance detail level, is typically chosen global light-control technology (Global Dimming) and realizes that dynamic is controlled System.For the picture of high brightness, such as glass in the sun reflective, fireworks etc. in the night sky, in display picture it is general not It is the highlighted of entire display picture, but the super brightness of short time, small area.In order to realize this effect, when backlight design It can generally consider that carrying out subregion to entire light source package is related to, i.e. local dynamic station backlight (Local Dimming) technology.High brightness And the combination of high colour gamut could show more perfect color, because high colour gamut display technology is wide with number of colours, color saturation The feature that degree is high, the more common colour gamut of color TV is more lively, image quality is beautiful.If it is not high that highlighted picture appears in colour gamut Display equipment on when, it may appear that the phenomenon that picture color whitens, color distortion, details color are unclear.

Therefore, the existing technology needs to be improved and developed.

Utility model content

Place in view of above-mentioned deficiencies of the prior art, the utility model are to solve prior art defect and deficiency, are proposed A kind of LCD backlight mould group can be realized high brightness, high colour gamut display effect, the LCD backlight mould group can be tied Global Dimming and Local the Dimming technology of conjunction solves the problems, such as that color distortion under high brightness picture, Color reproduction degree are low.

The utility model technical scheme applied to solve the technical problem is as follows:

A kind of LCD backlight mould group, the backlight module are down straight aphototropism mode set, and the LED of the backlight module is carried on the back Radiant is the color light source that red LED, green LED, blue led and White LED form, and the color light source passes through subregion, Each subregion is independently controlled and realizes backlight area control function.

As an improvement technical solution, if the LED backlight light source includes being arranged on liquid crystal display device side plate LED light bar is done, single LED in each LED light bar is spaced comprising red LED, green LED and blue LED die Three cores unification chip and White LED, it is described list LED in three cores unification chip in red LED, green LED and blue led Chip has been both electrically connected with individual circuit and has been controlled, and White LED is also electrically connected individual circuit and is controlled, according to liquid crystal The electric current of brightness and color adjustment circuit needed for showing picture.

As an improvement technical solution, if the LED backlight light source includes being arranged on liquid crystal display device side plate LED light bar is done, single LED in each LED light bar is red LED, green LED, blue led or White LED, the red LED, green LED, blue led or White LED are sequentially arranged in LED light bar, and each subregion includes red LED, green LED, blue led or White LED, so that each subregion being capable of the monochromatic red of independent control realization, green, blue or white back Light.

As an improvement technical solution, if the LED backlight light source includes being arranged on liquid crystal display device side plate LED light bar is done, single LED in each LED light bar is the color light source of red LED, green LED and White LED composition, Huo Zhewei The color light source of green, blue and White LED composition, or be the color light source of red, blue led and White LED composition, with Each subregion independent control is set to realize monochromatic red, green, blue or white backlight.

Red LED, green LED and indigo plant as an improvement technical solution, in the LED backlight light source of the backlight module Color LED is blue-ray LED excitation light source, and red LED is that blue-ray LED excitation light source adulterates red quantum dot in corresponding lens Material is formed, and green LED is adulterated green quanta point material for blue-ray LED excitation light source in corresponding lens and formed, blue led Transparent lens forming is used for blue-ray LED excitation light source.

As an improvement technical solution, the quanta point material is indium phosphide quantum dot, indium arsenic quanta point, GaAs Quantum dot, ZnS quantum dots, zinc selenide quantum dot or perovskite quanta point material.

As an improvement technical solution, purple LED excitation light source is can be used in the blue-ray LED excitation light source.

As an improvement technical solution, when carrying out subregion to color light source, when the number of partitions is 1, for global control light, point Area's number is local dynamic station backlight when being greater than 1.

Compared with prior art using LED white light as backlight, the utility model LCD backlight mould group is in backlight It is middle to use RGB color light source as backlight, the dynamic that high brightness, high colour gamut combine is realized in conjunction with local dynamic station backlight technology Colour gamut technology.By carrying out subregion to color backlights, it is independently controlled with partitioned area content, realizes colour Local Dimming effect realizes that regionality lights backlight LED light source when needing high brightness high color saturation, with traditional LED white light The scheme of complete white field high brightness is compared, and energy consumption can be substantially reduced.Extra high occasion is required in colour gamut, it can be red using quantum dot Color LED, quantum dot green LED and quantum dot blue led light source form backlight, or use high frequency LED light source, such as purple LED light source excites the red, green, blue color quantum dot lens to realize the display of high colour gamut.

Detailed description of the invention

Fig. 1 is a kind of cross section structure schematic illustration of LCD backlight mould group of the utility model.

Fig. 2 is a kind of side plate LED light bar arrangement schematic illustration of LCD backlight mould group of the utility model.

Fig. 3 is a kind of principle schematic diagram of LCD backlight mould group preferred embodiment one of the utility model.

Fig. 4 is the enlarged structure schematic illustration of single LED chip in Fig. 3.

Fig. 5 is a kind of principle schematic diagram of LCD backlight mould group preferred embodiment two of the utility model.

Fig. 6 is the utility model quantum dot lens light source theory structure schematic diagram.

Specific embodiment

To keep the purpose of this utility model, technical solution and advantage clearer, clear, develop simultaneously implementation referring to the drawings The utility model is further described in example.It should be appreciated that specific embodiment described herein is only used to explain this reality With novel, it is not used to limit the utility model.

Backlight module is one of the key part and component of panel of LCD.Function is well-off brightness and distribution Uniform light source can normally show image.So-called backlight (BackLight) is a kind of light positioned at liquid crystal display Source, its illumination effect will directly influence LCD MODULE visual effect.The quality of backlight performance is in addition to the direct shadow of meeting It rings outside LCD imaging quality, the cost of backlight accounts for the 30-50% of LCD module, and consumed electric power more accounts for the 75% of module, can say It is considerable spare part in LCD module.Mainly there are tri- kinds of type of backlight of EL, CCFL and LED at present, according to distribution of light sources Position difference is then divided into side-light type and straight-down negative (bottom backlight type).Side-light type is that light emitting source (Edge lighting) is put in side List Zhi Guangyuan；Relative to the light source design of its side of straight-down negative incidence, possess light weight, slim, narrow frame, low power consumption spy Color.Mainly it is made of light source, light guide plate, optical film piece, plastic frame etc..As HDR technology arrives, high brightness and high colour gamut skill Art becomes the hot spot of display industry research.The combination of high brightness and high colour gamut could show more perfect color.Because of high colour gamut Display technology has the spy that number of colours is wide, color saturation is high, the TV of the more common colour gamut of color is more lively, image quality is beautiful Point.Highlighted picture then will appear picture color and whiten, color distortion, see if there is in the not high display equipment of colour gamut The phenomenon that unclear detail color.There is presently no solutions for the not high problem of colour gamut.

LCD backlight mould group described in the utility model is side entrance back module.If Fig. 1 is the utility model one kind Shown in the cross section structure schematic illustration of LCD backlight mould group, since this programme use is in side entrance back module, LED Lamp bar is installed on the lateral plate structure of liquid crystal display device, and this case is to be installed to liquid crystal display device bottom for LED light bar For on heat sink, the side entrance back module is mainly by LED light bar 101, reflector plate 102, light guide plate 103, backboard 104, light Learn diaphragm group 105, heat sink 106 forms.Light source used in traditional side entrance back scheme is LED white light source, i.e. LED light bar The LED light laid on 101 is the LED light source of white.The arrangement mode of the utility model LED light bar such as Fig. 2 the utility model Shown in a kind of backboard LED light bar arrangement schematic illustration of LCD backlight mould group, equably cloth in LED light bar 101 Equipped with LED light 201, light guide plate 103 is immediately ahead of LED light bar.For the high image quality effect for realizing high brightness, high colour gamut, this is practical The LED light 201 that the novel LCD backlight mould group uses is red LED, green LED, blue led and White LED composition Color light source, and to the color light source carry out subregion, with to each subregion be independently controlled realize backlight area control function Can, make to show that equipment can take into account color detail in exhibit high brilliance picture, i.e., in high brightness scene, the reproduction degree of color The phenomenon that will not reducing, being not in high brightness distortion picture, and due to using colour Global Dimming and Local Dimming technology, moreover it is possible to greatly improve picture contrast, realize energy-saving effect.

Preferred embodiment one:

If Fig. 3 is a kind of principle schematic diagram institute of LCD backlight mould group preferred embodiment one of the utility model Show, the LED backlight light source of the LCD backlight mould group of the preferred embodiment in the utility model one includes being arranged in liquid crystal Several LED light bars 301 on showing device side plate, LED light bar 301 can be designed be distributed according to the structure of liquid crystal display device and be set It sets, the structure for being distributed setting is not the key of the utility model, is not repeated herein.In the present embodiment, LED light bar 301 uses LED light be comprising red LED, green LED and blue LED die three cores unification chip 302 and White LED 303, three cores The chip 302LED and White LED 303 of unification are equably arranged in LED light bar 301.Include red LED 3021, green Single LED in the principle assumption diagram such as Fig. 4 of the LED light 302 of the chip of the three cores unification of 3022 chip of LED3023 and blue led Shown in the enlarged structure schematic illustration of chip, it is in by 3,022 3 red LED 3021, green LED 3023 and blue led chips The LED light 302 that the unification of three cores is formed in LED substrate 401 is arranged in straight line.But red LED 3021, green LED 3023 and blue Tri- chips of LED3022 are not only merely that linear be arranged in LED substrate 401 forms LED light 302, red LED 3021, green 3,022 3 chips of color LED3023 and blue led can be arranged in LED substrate 401 in the form of triangular in shape etc..The unification of three cores LED light 302 in each red LED 3021, green LED 3023 and blue led 3022 there is individual circuit to be controlled, According to parameters such as the electric currents of required brightness and color adjustment independent circuits, when being adjusted to suitably match, three cores unify LED Lamp can show pure white.Although the LED light of three cores unification can show pure white, increase white in this preferred embodiment one The effect of LED is to improve backlight illumination, raising efficiency.

It is the control mode of Global Dimming, at this point, all three when the number of partitions is equal to 1 when backlight subarea is set Core unification chip 303 in red LED, green LED or blue led individually light, by Backlight Algorithm adjustment, it can be achieved that Global Dimming control.It is then the control mode of Local Dimming when subregion is greater than 1, the number of partitions is more, comparison It spends then higher；Such as when selecting the number of partitions as the LED quantity of entire back light, i.e., every equal independent switch control of LED lamp, when When certain display position needs to be displayed in red signal, the red chip at the position is lighted, that is, forms Local Dimming control effect Fruit.Certainly, optimal Backlight Algorithm may be selected with four LED as a subregion, when corresponding position needs to be displayed in red signal, Then all red chips at the position light output red signal, the better effect of Local Dimming simultaneously.Above four LED may include a White LED, and when corresponding position needs to be displayed in red signal, all red chips at the position are simultaneously Output red signal is lighted, while White LED also lights the danger signal, it can be achieved that super brightness, display effect is more preferable.Together Reason, the backlight display implementation method of other colors is also identical, does not repeat herein.

If color domain requires especially high, the LED light of the three cores unification in the LED backlight light source of the backlight module Blue-ray LED excitation light source, red LED 3021 may be selected in 302 red LED 3021, green LED 3023 and blue led 3022 Red quantum dot material is adulterated in corresponding lens for blue-ray LED excitation light source to be formed, green LED 3023 swashs for blue-ray LED Light emitting source adulterates green quanta point material in corresponding lens and is formed, and blue led 3022 is blue-ray LED excitation light source using saturating Bright lens forming.Its blue-ray LED excitation light source principle assumption diagram such as Fig. 6 the utility model quantum dot lens light source theory structure Shown in schematic diagram, it is made of blue-ray LED 601, quantum dot lens 602 and reflector plate 603.LED excitation light source blue-ray LED 601, root According to needing that high frequency LED light source, such as purple LED light source etc. may be selected.Quanta point material on quantum dot lens 602 is according to needed for Color selects the quanta point material of the color.Quanta point material currently on the market is in addition to II-VI group, iii-v system Inorganic-quantum-dot, for example, CdE(E=S/Se/Te) quantum dot, indium phosphide quantum dot, indium arsenic quanta point, gallium arsenide quanta point, Gallium arsenide quanta point and other systems such as ZnS quantum dots, zinc selenide quantum dot.Have also appeared perovskite material, example Such as inorganic perovskite CsPbX3 (x=Cl/Br/I) and hybrid inorganic-organic perovskite material CH3NH3PbX3(x=Cl/Br/I), CH3NH3PbX3(x=Cl/Br/I) etc..

To the subregion that color light source carries out, the number of partitions, such as the LED unified with four three cores can be selected according to actual needs Lamp 302 is a subregion, then when occurring danger signal herein, four red chips light output red signal simultaneously.One As for, subregion is more, and cost is higher.

If doing high contrast, number of partitions is just the quantity of LED light.That is, every lamp has independent switch, every lamp In chip be also independent switch, every chips are switched according to the difference of input signal.For example, ought need to show red herein When chrominance signal, the red chip at this position is lighted.Colored Local Dimming effect is formd in this way.

Preferred embodiment two:

Fig. 5 is shown in a kind of principle schematic diagram of LCD backlight mould group preferred embodiment two of the utility model. The LED backlight light source that the LCD backlight mould group of the preferred embodiment in the utility model two uses includes being arranged in liquid crystal display dress Several LED light bars 501 on side plate are set, single LED in each LED light bar 501 is red LED 502, green LED 504, blue LED503 or White LED 505.The red LED 502, green LED 504, blue led 503 or White LED 505 are uniform sequentially It is arranged in LED light bar 501.Because of side entrance back, red LED 502, green LED 504, blue led 503, White LED 505 Arrangement is point-blank.

It is the control mode of Global Dimming, at this point, each red when the number of partitions is equal to 1 when backlight subarea is set LED, green LED or blue led are individually lighted, by Backlight Algorithm adjustment, it can be achieved that Global Dimming is controlled.Work as subregion It is then the control mode of Local Dimming, the number of partitions is more, and contrast is then higher when greater than 1；When should all in each subregion It simultaneously include red LED, green LED, blue led and White LED, every equal independent switch of LED lamp controls, such as with red LED, green LED, blue led and White LED are a subregion, then when certain display position needs to be displayed in red signal, subregion In red LED light output red signal, form Local Dimming control effect.It is increased in this preferred embodiment two Efficiency equally can be improved in White LED, that is, White LED is also lighted while lighting red LED output red signal, realizes superelevation The danger signal of brightness.In this example, red LED can be separately controlled with White LED, while light red LED and White LED Perhaps Local Dimming control effect or independent control red LED or White LED are real by Shi Shixian Global Dimming Existing Global Dimming or Local Dimming control effect, can realize control according to the actual needs of display. Similarly, green LED or blue led, which add White LED, can also realize that above-mentioned red LED adds the Global Dimming of White LED Or Local Dimming control effect.

If color domain requires especially high, the list in LED light bar 501 in the LED backlight light source of the backlight module Red LED 502, green LED 504 or blue led 503 in LED may be selected to be blue-ray LED excitation light source, red LED502 adulterates red quantum dot material for blue-ray LED excitation light source in corresponding lens and is formed, and green LED 504 is blue light LED excitation light source adulterates green quanta point material in corresponding lens and is formed, and blue led 503 is that blue-ray LED excitation light source is adopted With transparent lens forming.Its blue-ray LED excitation light source principle assumption diagram such as Fig. 6 the utility model quantum dot lens light source principle Shown in structural schematic diagram, the selection of theory structure and quanta point material is identical with described in preferred embodiment one, herein no longer It states more.

Preferred embodiment three:

The present embodiment is third is that consider a kind of technological means that can be traded off in the case where cost, the base based on preferred embodiment one Plinth is realized, in the case where three cores of preferred embodiment one unify the higher situation of chip cost, which can also be unified chip LED be changed to two cores unification chip LED.LED backlight light source includes several LED light bars being arranged on backboard, each LED light bar In single LED be red LED, green LED and White LED composition color light source, or for green, blue and White LED The color light source of composition, or be the color light source of red, blue led and White LED composition, so that each subregion can be controlled independently System realizes monochromatic red, green, blue or white backlight.The red LED, the green LED that use form the core of two cores unification The chip LED and White LED for the two cores unification that the color light source of piece LED and White LED composition, green LED, blue led form The chip LED of the two cores unification of the color light source or red LED, blue led composition of composition and the colourama of White LED composition Source carries out backlight control adjusting, because red LED, green LED or green LED, blue led or red LED in the unification of two cores, Blue led and White LED have individual circuit to be controlled, can by the chip LED of two cores unification and White LED cooperation Realize the control of backlight.Its working principle is identical as preferred embodiment one, does not repeat herein.

, can also be such as preferred embodiment one in addition, if three color domain of this preferred embodiment requires in extra high situation In cooperate respective lens to realize using blue-ray LED excitation light source red LED, green LED and blue led, working principle Also identical with above preferred embodiment one, it does not repeat herein.

Above embodiments described in the utility model are used equally in curved surface backlight module.

It should be understood that the above is only the preferred embodiment of the utility model only, it is not sufficient to limit this reality With novel technical solution, for those of ordinary skills, within the spirit and principles of the present invention, Ke Yigen Increased and decreased according to above description, replaced, converted or is improved, and all these increases and decreases, replacement, transformation or improved technical side Case all should belong to the protection scope of the appended claims for the utility model.

Claims (8)

1. a kind of LCD backlight mould group, the backlight module is side entrance back module, which is characterized in that the backlight mould The LED backlight light source of group is the color light source that red LED, green LED, blue led and White LED form, the color light source By subregion, each subregion is independently controlled and realizes backlight area control function；

The LED backlight light source includes several LED light bars being arranged on liquid crystal display device side plate, and the LED light bar includes The chip and White LED of the three cores unification of red LED, green LED and blue LED die；The red LED, green LED and indigo plant Tri- chips of color LED are linearly arranged or are arranged at triangle.

2. a kind of LCD backlight mould group according to claim 1, which is characterized in that three cores close in the list LED Red LED, green LED and blue LED die in one chip have been both electrically connected with individual circuit and have been controlled, White LED It is electrically connected individual circuit to be controlled, with the electric current of the brightness according to needed for liquid crystal display picture and color adjustment circuit.

3. a kind of LCD backlight mould group according to claim 1, which is characterized in that the LED backlight light source includes Several LED light bars being arranged on liquid crystal display device side plate, single LED in each LED light bar be red LED, green LED, Blue led or White LED, the red LED, green LED, blue led or White LED are sequentially arranged in LED light bar, and each point Qu Jun includes red LED, green LED, blue led or White LED, so that each subregion is capable of the red of independent control realization monochrome Color, green, blue or white backlight.

4. a kind of LCD backlight mould group according to claim 1, which is characterized in that the LED backlight light source includes Several LED light bars being arranged on liquid crystal display device side plate, single LED in each LED light bar be red LED, green LED and The color light source of White LED composition is perhaps color light source or be red, blue that green, blue and White LED form The color light source of LED and White LED composition, so that each subregion being capable of the monochromatic red of independent control realization, green, blue or white Color backlight.

5. a kind of LCD backlight mould group according to any one of claims 1 to 4, which is characterized in that the backlight module LED backlight light source in red LED, green LED and blue led be blue-ray LED excitation light source, red LED is blue-ray LED Excitation light source adulterates red quantum dot material in corresponding lens and is formed, and green LED is blue-ray LED excitation light source corresponding It adulterates green quanta point material in lens to be formed, blue led is that blue-ray LED excitation light source uses transparent lens forming.

6. a kind of LCD backlight mould group according to claim 5, which is characterized in that the quanta point material is phosphatization Indium quantum dot, indium arsenic quanta point, gallium arsenide quanta point, ZnS quantum dots, zinc selenide quantum dot or perovskite quantum dot material Material.

7. a kind of LCD backlight mould group according to claim 5, which is characterized in that the blue-ray LED excitation light source Purple LED excitation light source can be used.

8. a kind of LCD backlight mould group according to claim 5, which is characterized in that carry out subregion to color light source When, when the number of partitions is 1, for global control light, the number of partitions is local dynamic station backlight when being greater than 1.