CN209327739U - A kind of display of novel LED backlight mould group - Google Patents

Abstract

The utility model discloses a kind of displays of novel LED backlight mould group, and LED light source, transparent dielectric layer, Diffusion barrier layer and the broadband high-pass colour filter of light packing forms are gone out including substrate, four sides；The LED light source that several four sides go out light packing forms is provided on the substrate, the LED light source includes that there is reflecting layer to form the red, green, blue chip that four sides goes out light for top surface, setting covers the transparent dielectric layer of all LED light sources on substrate, sets gradually Diffusion barrier layer and broadband high-pass colour filter from bottom to top on the transparent dielectric layer；The refractive index of the transparent dielectric layer is greater than the refractive index of Diffusion barrier layer lower surface.Utility model has the advantages that the utility model goes out the blue, green of light, red light source using four sides, therefore array pitch greatly improves, and required chip largely reduces compared to traditional Mini- backlight technology；The display of the utility model novel LED backlight mould group has highest colour gamut and high dynamic range, and product is thinner, and cost is relatively low.

Description

A kind of display of novel LED backlight mould group

Technical field

The utility model relates to field of display technology more particularly to a kind of displays of novel LED backlight module structure.

Background technique

As LCD technology constantly develops in business, industry and the fields such as military affairs, LED backlight because of low-power consumption, Lower calorific value, high brightness, high color reproduction degree, long-life, energy conservation and environmental protection and the advantages such as frivolous, success is instead of traditional CCFL (cold-cathode tube).

The present general LED backlight mould group of industry is broadly divided into direct-type backlight according to the difference of backlight source position and enters with side Two class of formula backlight；And according to the LED kind of use difference, and RGB LED and white light LEDs can be divided into.Common direct-light-type backlight Using LED light source is directly distributed in panel rear, light distribution is more uniform, but the cost is relatively high, due to needing lens to realize Light mixing, product thickness is thicker, cannot achieve ultra-thin；And side-edge type backlight then pass through accordingly design by LED point light source setting exist Light guide plate side, by light guide plate adjust light distribution, therefore, cost is relatively low, and product thickness can realize it is lightening.And RGB LED backlight generally uses RGB (RGB) primitive colours LED as individual lighting elements, compared with white light LED backlight, has Better brightness, contrast and colorfulness.

The generally use of LED backlight mould group also promotes the continuous transformation and innovation of existing display technology, shows skill now In art other than original common side entering type and direct-light type LED backlight liquid crystal module are shown, there are also just intimately rising in recent years from Luminescence display, therefore show that product also emerges one after another on the market at present, such as: traditional side entering type and straight-down negative LED liquid crystal display, ULED, QLED, Mini- backlight, OLED, Mini-LED etc..And then show the high color saturation of equipment, lightening, high dynamic Range, and low cost have become the main trend that people constantly pursue.

Firstly, as shown in Figure 1, its more all right bright emission wavelength of the monochromaticjty of three primary colours is more in margin location in gamut map It sets, the triangle area surrounded is also bigger, therefore its gamut area also will be bigger, and then the color that display can be shown also is got over More, the color that picture, video can be shown also will be abundanter；And the OLED in the relatively current product of luminous monochromaticjty of LED And QLED is preferable, and the luminous peak width of LED itself is minimum.Therefore, the colour gamut of three-primary color LED is relatively most under normal circumstances Extensively.

Secondly, the more bright-coloured display effect of color in order to obtain, not only needs wide colour gamut, at the same also need to have compared with The ratio between luminance difference that high reality is truly present (i.e. the ratio between most bright object brightness and most dark object brightness) high dynamic range (HDR).There was only both display technologies of Mini-LED and OLED at present, all using positive self-luminous and without backlight module and liquid The structures such as brilliant mould group, therefore, HDR are also highest in current all displays, theoretically light-dark ratio infinity；Secondly, at present Also more popular to be adopted as direct-light type LED backlight mould group, such as: traditional direct-type backlight shows, ULED and Mini- backlight, but is both needed to The structures such as backlight module and liquid crystal module can lead to have part light loss because of the presence of two panels polarizing film in mould group, however it is straight under Therefore region delustring technology (Local Dimming), which can be used, in formula backlight can get higher HDR；And most commonly used side Enter formula LED backlight mould group, such as: common side entering-type LED backlight is shown and QLED, is equally both needed to the knot such as backlight module and liquid crystal module Structure not only has part light loss, at the same also need light guide plate could present uniformly go out light effect, cause light conversion efficiency low and There are light leakage, the above two big factor loses a large amount of light, therefore HDR is also relatively minimum.

Finally, such as traditional side entering type and direct-light type LED backlight and ULED preferable monochromaticjty and relatively narrow in order to obtain Half-peak breadth is typically employed to narrow band filter, though its monochromaticjty and half-peak breadth can be made to be improved, its luminous flux also will be by To strong influence.Under normal conditions when incidence angle is positive and negative 20 degree, the transmitance of monochromatic narrow band filter can be descended to 50% hereinafter, and monochromatic broad band pass filter transmitance still has 85%.Not only light transmittance can seriously affect luminous flux, also lead to it HDR effect is relatively poor, and the price of narrow band filter will be higher by much with respect to high-pass filter, and cost is also relatively high.

In the common LED liquid crystal display and QLED for using traditional side entering-type LED backlight mould group, the two is all made of side entering type LED backlight mould group, as shown in Fig. 2, including the lower reflecting layer 1 ' set gradually from bottom to top, light guide plate 2 ', Diffusion barrier layer 3 ', increasing Light film layer 4 ', lower cross-polarization piece 5 ', liquid crystal mould 6 ', three-colour filter 7 ' and upper cross-polarization piece 8 ', and in light guide plate 2 ' Side be equipped with LED light source 9 ', all use light guide plate and liquid crystal module, although product thickness is relatively thin, its dynamic range is equal It is lower, and the colour gamut of common side entering type LED liquid crystal display is lower.On this basis, QLED uses higher three base of purity simultaneously Color quantum dot has high colour gamut as down-conversion luminescent material, while price also compares common side entering type LED liquid crystal Show and want high, but the problem of quantum dot exists simultaneously poor chemical stability, therefore QLED service life is also than common side entering type LED Liquid crystal display wants short.And shown using traditional direct-type backlight in direct-light type LED backlight mould group, ULED and Mini- backlight, Without light guide plate, long service life, but must liquid crystal module；Wherein common directly-down liquid crystal shows that there are still colour gamuts and dynamic model Low problem is enclosed, and product is very thick, but its service life is equally longer, it is cheap；ULED then passes through 576 LED light sources Angle lens are increased, higher dynamic range can get using region delustring technology and software control, it is low that also there are still colour gamuts Problem, but traditional straight-down negative of its product thickness relatively very thickness shows and is thinned, while price is relatively high；And Mini- is carried on the back Gloss is encapsulated with a large amount of LED particle high density COB and realizes uniform backlight, has preferable colour gamut, high dynamic range, product also phase To relatively thin, but since adjacent LED spacing is only 2mm, need using a large amount of chips, therefore its price is also relatively higher.And it relies on The OLED and Mini-LED that self-luminous is shown are not necessarily to light guide plate and liquid crystal module；Wherein OLED uses organic matter self-luminous battle array Column issue purer three primary colours, bring higher colour gamut and dynamic range, product is although thin, but the service life is short, and cost is also higher； And Mini-LED is known as in the coming years most being directlyed adopt three-primary color LED by product is expected, color is most pure, has highest Colour gamut and high dynamic range, and product is thinner, but cost also highest, at present also in development phase.

In conclusion the above existing display technology needs to be further improved and enhanced.

Utility model content

The technical problem to be solved by the present invention is to provide one kind to have highest colour gamut and high dynamic range, and product is more It is thin, the display of lower-cost novel LED backlight mould group.

In order to solve the above technical problems, the technical solution of the utility model are as follows: a kind of display of novel LED backlight mould group Device, innovative point are: going out LED light source, transparent dielectric layer, Diffusion barrier layer and the use of light packing forms including substrate, four sides The liquid crystal module of broadband high-pass optical filter；

The LED light source that several four sides go out light packing forms is provided on the substrate, the LED light source is that top surface has instead It penetrates layer and forms feux rouges, green light, blue chip that four sides goes out light, setting covers the transparent medium of all LED light sources on substrate Layer, the height of the transparent dielectric layer are equal to or higher than the apical side height of LED light source, and on the transparent dielectric layer from bottom to top Set gradually Diffusion barrier layer and the liquid crystal module using broadband high-pass optical filter；

The refractive index of the transparent dielectric layer is greater than the refractive index of Diffusion barrier layer lower surface.

Further, the LED light source includes LED chip body and the reflection for being covered on the LED chip body top surface Layer.

Further, the LED light source includes LED chip body, is provided in the top surface of LED chip body and side Reflecting layer is arranged in the top surface of bright layer, hyaline layer.

Further, reflecting layer in also setting up, the middle reflecting layer are set between LED chip body top surface and hyaline layer For total reflection layer or partially reflecting layer.

Further, the medium refraction index of the hyaline layer is greater than or equal to transparent dielectric layer refractive index.

Further, lower reflecting layer is equipped with close to a side surface of transparent dielectric layer in the substrate.

Further, the upper surface of the substrate or the lower surface of transparent dielectric layer are equipped with Microstructure Optics scattering layer, or Microstructure Optics scattering layer is equipped in the upper surface of transparent dielectric layer.

Further, the lower surface of the Diffusion barrier layer has a rough micro-structure, and the micro-structure account for it is described The 10~100% of the Diffusion barrier layer gross area.

Utility model has the advantages that the display of the utility model novel LED backlight mould group, proposes a kind of three colors Mini- backlight, directlys adopt three-primary color LED, needs LCD backlight mould group (LCM)；Compared to traditional Mini- backlight technology, originally The four sides that utility model uses goes out the blue, green of light, red light source, therefore array pitch greatly improves, and required chip largely subtracts It is few；The display of the novel LED backlight mould group of the utility model has high colour gamut, high dynamic range (20000:1), only needs to use The higher broad band pass filter of luminous flux, it is frivolous, can be flexible, relatively at a low price, and realize scale volume production using mature liquid crystal producing line.

Detailed description of the invention

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

Fig. 1 is the gamut map of three primary colours.

Fig. 2 is the structural schematic diagram of common side entrance back module.

Fig. 3 is the first embodiment schematic diagram of the display of the utility model novel LED backlight mould group.

Fig. 4 is the utility model first embodiment LED light source structure schematic diagram.

Fig. 5 is the second embodiment schematic diagram of the display of the utility model novel LED backlight mould group.

Fig. 6 is the utility model second embodiment LED light source structure schematic diagram.

Fig. 7 is another structural schematic diagram of the utility model second embodiment LED light source.

Specific embodiment

The following examples can make professional and technical personnel that the utility model be more fully understood, but therefore will not The utility model is limited among the embodiment described range.

Embodiment 1

The display of the present embodiment novel LED backlight mould group, as shown in figure 3, including substrate 1, four sides light packing forms out LED light source 2, transparent dielectric layer 3, Diffusion barrier layer 4 and using broadband high-pass optical filter liquid crystal module 5.

The LED light source 2 that several four sides go out light packing forms is provided on substrate 1, LED light source is that 1 top surface has reflecting layer The red, green, blue chip that four sides goes out light is formed, setting covers the transparent dielectric layer 3 of all LED light sources 2 on substrate 1, transparent The height of dielectric layer 3 is equal to or higher than the apical side height of LED light source 2, and sets gradually diffusion on transparent dielectric layer 3 from bottom to top Film layer 4 and the liquid crystal module 5 for using broadband high-pass optical filter.

In the present embodiment, as shown in figure 4, four sides go out light packing forms LED light source 2 include LED chip body 21 and It is covered on the reflecting layer 22 of 21 top surface of chip body, the area in reflecting layer 22 is equal to the top surface area of LED chip body 21.Instead Penetrating layer 22 can be used DBR distributed bragg reflector mirror or metallic reflector.

In the present embodiment, the refractive index of transparent dielectric layer 3 is greater than the refractive index of 4 lower surface of Diffusion barrier layer, and Diffusion barrier layer 4 Lower surface there is micro-structure, and micro-structure accounts for the 10~100% of the Diffusion barrier layer gross area.The micro-structure passes through in Diffusion barrier layer It is coated with organic matter diffusion particle and adhesive on 4 and forms rough surface, or by modes such as rolling by Diffusion barrier layer 4 Surface become irregular surface texture.Cavity is formed using these uneven or irregular surface minim gaps, into And the air low-index layer of transparent dielectric layer 3 is far below as refractive index.

In order to improve the situation of light intensity unevenness, hoisting light mixing effect can be according to circumstances in the upper surface of substrate 1 or transparent Jie The lower surface of matter layer 3 is equipped with Microstructure Optics scattering layer, and or scatters in the upper surface of transparent dielectric layer 3 equipped with Microstructure Optics Layer.The Microstructure Optics scattering layer is generally located on 2 center of LED light source for the rectangular array distribution that four adjacent on substrate 1.

In addition, may be selected to be equipped with lower reflecting layer 6 close to a side surface of transparent dielectric layer 3 in substrate 1.

Embodiment 2

The present embodiment structure is substantially the same manner as Example 1, as shown in figure 5, including substrate 1, four sides light packing forms out LED light source 2, transparent dielectric layer 3, Diffusion barrier layer 4 and using broadband high-pass optical filter liquid crystal module 5.

The LED light source 2 that several four sides go out light packing forms is provided on substrate 1, LED light source is that 1 top surface has reflecting layer The red, green, blue chip that four sides goes out light is formed, setting covers the transparent dielectric layer 3 of all LED light sources 2 on substrate 1, transparent The height of dielectric layer 3 is equal to or higher than the apical side height of LED light source 2, and sets gradually diffusion on transparent dielectric layer 3 from bottom to top Film layer 4 and the liquid crystal module 5 for using broadband high-pass optical filter.

The difference is that: as shown in fig. 6, LED light source includes LED chip body 21, in the top surface of LED chip body 21 And side is provided with hyaline layer 23, reflecting layer 22 is arranged in the top surface of hyaline layer 23.The medium refraction index of hyaline layer 23 is higher than or waits In the refractive index of transparent dielectric layer 3.

As embodiment, more specific embodiment is, as shown in fig. 7, in 21 top surface of LED chip body and hyaline layer 23 Between setting also set up middle reflecting layer 24, middle reflecting layer 24 is total reflection layer or partially reflecting layer.

Using the parameters pair of backlight module made from LED light source in the present embodiment 2 and traditional down straight aphototropism mode set Than as follows:

6 inches of mobile phone backlight application cases

Conclusion: as can be seen from the above table, under the premise of in light emitting region, area is identical, backlight module thickness is identical, this reality It applies in example, the indigo plant of light is gone out due to using four sides, green, main light emission energy position is offset to side from surface by red light source, together When, light emitting angle is up to 170 ° or more, under the premise of guaranteeing identical light mixing effect, effectively raises between adjacent light source Away from light source granule number is greatly reduced.

In order to protrude the display of the utility model novel LED backlight mould group, it is compared with conventional display device, Its correlation data see the table below:

As can be seen from the above table, the display of the utility model novel LED backlight mould group, compared with traditional monitor, tool Have high colour gamut, high dynamic range (20000:1), only need using the higher broad band pass filter of luminous flux, it is frivolous, can be flexible, lower Valence, and scale volume production is realized using mature liquid crystal producing line.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.This The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments That states only illustrates the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model It will also have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.This is practical new Type is claimed range and is defined by the appending claims and its equivalent thereof.

Claims (8)

1. a kind of display of novel LED backlight mould group, it is characterised in that: go out the LED light of light packing forms including substrate, four sides Source, transparent dielectric layer, Diffusion barrier layer and the liquid crystal module using broadband high-pass optical filter；

The LED light source that several four sides go out light packing forms is provided on the substrate, the LED light source is that top surface has reflecting layer Feux rouges, green light, blue chip that four sides goes out light are formed, setting covers the transparent dielectric layer of all LED light sources, institute on substrate The height for stating transparent dielectric layer is equal to or higher than the apical side height of LED light source, and on the transparent dielectric layer from bottom to top successively Diffusion barrier layer and the liquid crystal module using broadband high-pass optical filter are set；

The refractive index of the transparent dielectric layer is greater than the refractive index of Diffusion barrier layer lower surface.

2. the display of novel LED backlight mould group according to claim 1, it is characterised in that: the LED light source includes LED chip body and the reflecting layer for being covered on the LED chip body top surface.

3. the display of novel LED backlight mould group according to claim 1, it is characterised in that: the LED light source includes LED chip body is provided with hyaline layer in the top surface of LED chip body and side, and reflecting layer is arranged in the top surface of hyaline layer.

4. the display of novel LED backlight mould group according to claim 3, it is characterised in that: in LED chip body top surface Setting also sets up middle reflecting layer between hyaline layer, and the middle reflecting layer is total reflection layer or partially reflecting layer.

5. the display of novel LED backlight mould group according to claim 3 or 4, it is characterised in that: Jie of the hyaline layer Matter refractive index is greater than or equal to transparent dielectric layer refractive index.

6. the display of novel LED backlight mould group according to claim 1, it is characterised in that: close in the substrate One side surface of transparent dielectric layer is equipped with lower reflecting layer.

7. the display of novel LED backlight mould group according to claim 1, it is characterised in that: the upper surface of the substrate Or the lower surface of transparent dielectric layer is equipped with Microstructure Optics scattering layer, or is equipped with Microstructure Optics in the upper surface of transparent dielectric layer Scattering layer.

8. the according to claim 1, display of novel LED backlight mould group described in 2,3,4,6 or 7, it is characterised in that: the expansion Dissipate film layer lower surface have rough micro-structure, and the micro-structure account for the Diffusion barrier layer gross area 10~ 100%.