CN108761918A - A kind of LCD display device and its back light source structure - Google Patents
A kind of LCD display device and its back light source structure Download PDFInfo
- Publication number
- CN108761918A CN108761918A CN201810767141.4A CN201810767141A CN108761918A CN 108761918 A CN108761918 A CN 108761918A CN 201810767141 A CN201810767141 A CN 201810767141A CN 108761918 A CN108761918 A CN 108761918A
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- Prior art keywords
- light
- layer
- transition material
- display device
- organic fluorescence
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a kind of LCD display device and its back light source structures, the LCD display device includes back light source structure and LCD modules, the back light source structure includes backboard, the reflector being successively set on backboard, light guide plate and brightness enhancement film and multiple LED illuminating parts in light guide plate side are set, it further include the optical color conversion film being arranged between the light guide plate and brightness enhancement film, the optical color conversion film includes resin base membrane layer and is arranged coating layer in resin base membrane layer upper and lower surface, the coating layer includes the multiple diffused components for being adhered to the solidification colloid layer of the corresponding resin basement membrane layer surface and being evenly distributed in solidification colloid layer, the solidification colloid layer includes the solidification colloid containing organic fluorescence transition material.Excitation purity, light efficiency, brightness, light transmittance and the NTSC color gamut of the white light sent out can be improved in the present invention, and low energy consumption, energy conservation and environmental protection, at low cost.
Description
【Technical field】
The present invention relates to full-color display back light source technique fields, are set more particularly, to a kind of LCD (liquid crystal display) displays
Standby and its back light source structure.
【Background technology】
LCD is the widest flat panel display technology of current application, for currently used LCD display device, as mobile phone is aobvious
Display screen, television display screen etc., generally use white light LED backlight structure provide backlight.Traditional white light LED backlight knot
Structure is broadly divided into following three kinds：
(1) blue-light LED chip excites yellow inorganic fluorescent powder structure；
(2) UV LED chip excites redgreenblue inorganic fluorescent powder structure simultaneously；
(3) redgreenblue LED integrated morphologies.
However, there are some apparent defects for above-mentioned three kinds common white light LED backlights.Wherein, back light source structure (1)
It is the simplest, but its spectrum is very dull, and color rendition degree is poor, and the white light generated is through the formed three primary colours of optical filter
In, in addition to blue light, red green purity and efficiency are undesirable, are not the optimal selections of LCD backlight.The color of back light source structure (2)
Color relative abundance, but as a result of ultraviolet light as fluorescence excitation source, larger to the harm of naked eyes, Related product is at present
It is not mature enough.Back light source structure (3) current comparative maturity has some applications in plane display field, but its structure composition is multiple
It is miscellaneous, prepare cumbersome, production cost is relatively high.
【Invention content】
It is an object of the invention to overcome the shortcomings of above-mentioned technology, providing a kind of having higher excitation purity, light efficiency and bright
The LCD display device and its back light source structure of degree and low cost.
A kind of LCD display device that the first aspect of the present invention provides, including back light source structure and LCD modules, the back of the body
Reflector, light guide plate and the brightness enhancement film and be arranged in light guide plate side that light-source structure includes backboard, is successively set on backboard
Multiple LED illuminating parts, further include the optical color conversion film being arranged between the light guide plate and brightness enhancement film, the optical color conversion film
Including resin base membrane layer and coating layer in resin base membrane layer upper and lower surface is set, the coating layer includes being adhered to
The solidification colloid layer of the corresponding resin basement membrane layer surface and the multiple diffused components being evenly distributed in solidification colloid layer,
The solidification colloid layer includes the solidification colloid containing organic fluorescence transition material.
Further, the organic fluorescence transition material includes that feux rouges organic fluorescence transition material and green light organic fluorescence turn
The solidification colloid layer of conversion materials, resin base membrane layer upper surface includes the solidification containing the feux rouges organic fluorescence transition material
The solidification colloid layer of colloid, resin base membrane layer lower surface includes the solidification glue containing the green light organic fluorescence transition material
Body.
Further, the luminescence peak of the feux rouges organic fluorescence transition material is 615-625nm, and the green light is organic glimmering
The luminescence peak of light conversion material is 520-530nm.
Further, the mass ratio of the relatively corresponding solidification colloid of the feux rouges organic fluorescence transition material focuses on 1/
Between, the mass ratio of the relatively corresponding solidification colloid of the green light organic fluorescence transition material focuses on
Between.
Further, the LED illuminating parts include the transparent enclosure glue-line in LED chip and setting LED chip.
Further, the LED chip is blue-light LED chip, and the luminescence peak of the blue-light LED chip is 400-
500nm。
Further, the luminescence peak of the blue-light LED chip is 460-470nm.
Further, the diffused component includes diffusion particle, a diameter of 2-30 μm of the diffusion particle.
Further, the resin base membrane layer includes resin basement membrane, and the thickness of the resin basement membrane is 45-55 μm.
The second aspect of the present invention provide a kind of back light source structure, including backboard, be successively set on it is reflective on backboard
Plate, light guide plate and brightness enhancement film and multiple LED illuminating parts in light guide plate side are set, further include setting in the light guide plate and
Optical color conversion film between brightness enhancement film, the optical color conversion film include resin base membrane layer and are arranged in resin base membrane layer upper surface
With the coating layer of lower surface, the coating layer include be adhered to the corresponding resin basement membrane layer surface solidification colloid layer and
The multiple diffused components being evenly distributed in solidification colloid layer, the solidification colloid layer includes containing organic fluorescence transition material
Cure colloid.
Implement the present invention, excitation purity, light efficiency, brightness, light transmittance and the NTSC color gamut of the white light sent out can be improved, it can be substantially
Degree promotes color rendition degree, and low energy consumption, energy conservation and environmental protection, at low cost, is damaged to human eyesight small.
【Description of the drawings】
Fig. 1 is the floor map for the LCD display device that one embodiment of the invention provides；
Fig. 2 is the decomposition diagram of the back light source structure of LCD display device shown in Fig. 1；
Fig. 3 is the schematic cross-sectional view of the optical color conversion film of back light source structure shown in Fig. 2；
Fig. 4 is the white-light spectrum curve graph of the back light source structure of an embodiment shown in Fig. 2 in normal operation.
【Specific implementation mode】
The invention will be further described with reference to the accompanying drawings and examples.
With reference to figure 1 and Fig. 2, a kind of LCD display device that one embodiment of the invention provides, such as mobile phone display screen, TV
Machine display screen etc., including back light source structure 100 and the LCD modules (being not shown on figure) that are arranged on back light source structure 100.Backlight
Source structure 100 provides backlight to LCD modules.
Back light source structure 100 include backboard 10, the reflector 11 being successively set on backboard 10, light guide plate 12, photochromic turn
It changes film 13 and brightness enhancement film 14 and multiple LED illuminating parts 15 to the horizontal projection of light guide plate 12 in 12 side of light guide plate is set.
Luminous (that is, in-plane where light guide plate 12) in the horizontal direction of LED illuminating parts 15 enters light guide plate 12, in light guide plate 12
Inside be converted to vertical direction transmitting (that is, perpendicular to direction of light guide plate 12).Reflector 11 is carried out for the opposite lower light emitted
Reflection is to ensure that all light all emit upwards.The light that optical color conversion film 13 is used to come out from 12 Vertical Launch of light guide plate carries out light
Color is converted and the light for making Vertical Launch come out is evenly distributed in entire plane.Brightness enhancement film 14 is for switching to the light of oblique transmitting
Emit to surface.
LED illuminating parts 15 include LED chip and the transparent enclosure glue-line being arranged in LED chip.LED chip is preferably
Blue-light LED chip.The luminescence peak of blue-light LED chip is 400-500nm (nanometer), and the present embodiment blue-light LED chip shines
Peak value is preferably 460-470nm.Luminescence peak is danger of the blue chip to the fundus flavimaculatus of human eye of 460-470nm, that is, long wavelength
Evil is smaller, relative to the blue chip of the relatively low i.e. short wavelength of other peak luminous wavelengths, under the premise of not losing display effect
It can effectively reduce in light source to being damaged caused by human eyesight, protect the health of human eye.
With reference to figure 3, optical color conversion film 13 include resin base membrane layer 131 and setting in 131 upper surface of resin base membrane layer and
The coating layer 132 of lower surface.Resin base membrane layer 131 includes resin basement membrane.Resin basement membrane is preferably that light transmittance is poly- higher than 90%
Object film, such as polyester (PET) film are closed, light transmission is good, at low cost.The thickness of resin basement membrane is 45-55 μm (micron), excellent
It is selected as 50 μm.The thickness of resin basement membrane can be selected according to actual conditions.Coating layer 132 includes being adhered to corresponding resin base
The solidification colloid layer 133 on 131 surface of film layer and the multiple diffused components 134 being evenly distributed in solidification colloid layer 133.Diffusion
The number of element 134 can be configured according to the actual size of resin base membrane layer 131.Solidification colloid layer 133 will be for that will spread member
Part 134 is fixedly attached to the surface of resin base membrane layer 131.Diffused component 134 is used to have an impact the transmission of light and diverging,
Uniform light is set to spread.Diffused component 134 includes diffusion particle, and diffusion particle is preferably PMMA (polymethyl methacrylate) grain
Son or PS (polystyrene) particle etc..A diameter of 2-30 μm of diffusion particle, preferably 15 μm.The type of diffusion particle, diameter
Size can be selected according to actual conditions.
It includes the solidification colloid containing organic fluorescence transition material to cure colloid layer 133, and solidification colloid preferably has
The bonding resin of machine fluorescence transition material, bonding resin has the characteristic of good ultra-violet curing or heat cure, convenient for solidification.
Solidification colloid is produced as follows：Bonding resin material and organic fluorescence transition material are mixed and led to
It crosses organic solvent to be dissolved, complete after being sufficiently stirred.
In the present embodiment, organic fluorescence transition material includes feux rouges organic fluorescence transition material and the conversion of green light organic fluorescence
Material.The solidification colloid layer 133 of 131 upper surface of resin base membrane layer includes the solidification glue containing feux rouges organic fluorescence transition material
Body.The mass ratio of the relatively corresponding solidification colloid of feux rouges organic fluorescence transition material focuses between 1/100000-1/10000.It is red
The luminescence peak of light organic fluorescence transition material is 615-625nm, and has stronger light absorption energy in the wavelength period of 520-530nm
Power.The solidification colloid layer 133 of 131 lower surface of resin base membrane layer includes the solidification colloid containing green light organic fluorescence transition material.
The mass ratio of the relatively corresponding solidification colloid of green light organic fluorescence transition material focuses between 1/10000-1/1000.Green light is organic
The luminescence peak of fluorescence transition material is 520-530nm, and has stronger light absorpting ability in the wavelength period of 460-470nm.By
It is located at the lower surface of resin base membrane layer 131 in green light organic fluorescence transition material, so as to emit and pass through blue-light LED chip
The some blue light that light guide plate 12 is launched is changed into green emission by way of luminescence generated by light.And feux rouges organic fluorescence converts material
Material position can will pass through light in the upper surface of resin base membrane layer 131 by the part green light of green light organic fluorescence transition material transformation
The mode of photoluminescence is changed into feux rouges.In actual application, by adjusting green light and feux rouges organic fluorescence transition material
Ratio is, it can be achieved that emit blue light, feux rouges and the green light of standard proportional.The blue and green light emitted by blue-light LED chip is organic glimmering
The green light of light conversion material transformation and the feux rouges of feux rouges organic fluorescence transition material transformation are greatly improved back light source structure 100
White light excitation purity, light efficiency and brightness, reduce energy consumption, relatively traditional back light source structure can save the energy of 15%-50%
Consumption, at low cost, performance is stablized.And the green light and feux rouges organic fluorescence changed by green light organic fluorescence transition material is converted
The feux rouges of material transformation is with higher color saturation and colour gamut, it can be achieved that 90% or more NTSC (National Television marks
The quasi- committee) colour gamut.For inorganic fluorescent material, compatibility of the organic fluorescence materials for different wave length blue-light LED chip
Stronger, the long wavelength's blue light for the 460-470nm that can arrange in pairs or groups of property, more healthy eyeshield；Organic fluorescence transition material is opposite simultaneously holds
Easy natural degradation, will not be detrimental to health and environment, strong applicability.
Fig. 4 be the use of luminescence peak is 460nm blue-light LED chip, luminescence peak be 530nm green light organic fluorescence turn
The back light source structure 100 that conversion materials and the feux rouges organic fluorescence transition material that luminescence peak is 622nm combine is in normal work shape
White-light spectrum curve graph under state.Green light organic fluorescence transition material is 1/ relative to the quality proportion of corresponding solidification colloid
1000, feux rouges organic fluorescence transition material is 1/10000 relative to the quality proportion of corresponding solidification colloid.In white-light spectrum song
In line chart, horizontal axis indicates that spectral wavelength, that is, luminescence peak, the longitudinal axis indicate spectral intensity.As can be seen that through the invention from figure
The spectrum of white light that emits of back light source structure 100 is wider, distribution more balances, there is higher luminous efficiency.
By above-mentioned back light source structure 100, LCD display device of the invention may be implemented >=90% or even 100%
NTSC color gamut, and the trichromatic excitation purity of RGB is greatly improved, performance is stablized, energy saving, while the light transmittance of light is obtained
It is promoted, light transmittance can promote 25% or more.
The LCD display device of the present invention is shown with the existing LCD for doing backlight with traditional white light LED backlight structure
Show that equipment is compared, contrast effect is as shown in the table：
As it can be seen that the LCD display device of the present invention is greatly improved excitation purity, light efficiency, brightness, light transmittance and NTSC color gamut,
It is highly practical.
Above example only expresses the preferred embodiment of the present invention, the description thereof is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, it is such as special to the difference in each embodiment
Sign is combined, and these are all within the scope of protection of the present invention.
Claims (10)
1. a kind of LCD display device, including back light source structure and LCD modules, the back light source structure include backboard, set gradually
Reflector, light guide plate and brightness enhancement film on backboard and multiple LED illuminating parts in light guide plate side are set, feature exists
In：Further include the optical color conversion film being arranged between the light guide plate and brightness enhancement film, the optical color conversion film includes resin basement membrane
Layer and coating layer in resin base membrane layer upper and lower surface is set, the coating layer includes being adhered to the corresponding tree
The solidification colloid layer of aliphatic radical film surface and the multiple diffused components being evenly distributed in solidification colloid layer, the solidification colloid
Layer includes the solidification colloid containing organic fluorescence transition material.
2. LCD display device according to claim 1, it is characterised in that：The organic fluorescence transition material includes feux rouges
Organic fluorescence transition material and green light organic fluorescence transition material, the solidification colloid layer of resin base membrane layer upper surface include containing
It includes containing to have the solidification colloid of the feux rouges organic fluorescence transition material, the solidification colloid layer of resin base membrane layer lower surface
The solidification colloid of the green light organic fluorescence transition material.
3. LCD display device according to claim 2, it is characterised in that：The hair of the feux rouges organic fluorescence transition material
Photopeak value is 615-625nm, and the luminescence peak of the green light organic fluorescence transition material is 520-530nm.
4. LCD display device according to claim 2, it is characterised in that：The feux rouges organic fluorescence transition material is opposite
The mass ratio of the corresponding solidification colloid focuses between 1/100000-1/10000, the green light organic fluorescence transition material phase
The mass ratio of the corresponding solidification colloid is focused between 1/10000-1/1000.
5. LCD display device according to claim 1, it is characterised in that：The LED illuminating parts include LED chip and
Transparent enclosure glue-line in LED chip is set.
6. LCD display device according to claim 5, it is characterised in that：The LED chip is blue-light LED chip, described
The luminescence peak of blue-light LED chip is 400-500nm.
7. LCD display device according to claim 6, it is characterised in that：The luminescence peak of the blue-light LED chip is
460-470nm。
8. LCD display device according to claim 1, it is characterised in that：The diffused component includes diffusion particle, described
A diameter of 2-30 μm of diffusion particle.
9. LCD display device according to claim 1, it is characterised in that：The resin base membrane layer includes resin basement membrane, institute
The thickness for stating resin basement membrane is 45-55 μm.
10. a kind of back light source structure, including backboard, the reflector being successively set on backboard, light guide plate and brightness enhancement film and set
Set multiple LED illuminating parts in light guide plate side, it is characterised in that：Further include being arranged between the light guide plate and brightness enhancement film
Optical color conversion film, the optical color conversion film include resin base membrane layer and are arranged painting in resin base membrane layer upper and lower surface
Layer of cloth, the coating layer include being adhered to the solidification colloid layer of the corresponding resin basement membrane layer surface and being evenly distributed to solid
Change multiple diffused components in colloid layer, the solidification colloid layer includes the solidification colloid containing organic fluorescence transition material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810307695 | 2018-04-08 | ||
| CN2018103076956 | 2018-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108761918A true CN108761918A (en) | 2018-11-06 |
Family
ID=63973588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810767141.4A Withdrawn CN108761918A (en) | 2018-04-08 | 2018-07-13 | A kind of LCD display device and its back light source structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108761918A (en) |
-
2018
- 2018-07-13 CN CN201810767141.4A patent/CN108761918A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20181106 |