CN208781116U - A kind of tablet computer and its LCD display device - Google Patents

Abstract

The utility model relates to a kind of tablet computer and its LCD display devices, the tablet computer includes processor and LCD display device connected to the processor, LCD display device includes back light source structure and LCD mould group, 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 that light guide plate side is 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 the coating layer that resin base membrane layer upper and lower surfaces are arranged in, the resin base membrane layer includes the resin basement membrane containing feux rouges organic fluorescence transition material；The LED illuminating part includes LED chip and the encapsulation glue-line containing green phosphor fluorescent powder that is arranged in LED chip.Excitation purity, light efficiency, brightness, light transmittance and the NTSC color gamut of the white light of sending can be improved in the utility model, and low energy consumption, energy conservation and environmental protection, at low cost.

Description

A kind of tablet computer and its LCD display device

[technical field]

The utility model relates to full-color display back light source technique fields, more particularly, to a kind of tablet computer and its LCD (liquid crystal display) shows equipment.

[background technique]

LCD is the widest flat panel display technology of current application, and the LCD of currently used tablet computer is shown and is set It is standby, it generallys use white light LED backlight structure and backlight is provided, traditional white light LED backlight structure is broadly divided into following three Kind:

(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 morphology.

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 due to using ultraviolet light as fluorescence excitaton 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.

[utility model content]

The purpose of the utility model is to overcome the deficiencies of above-mentioned technology, provide a kind of with higher excitation purity, light efficiency With the tablet computer and its LCD display device of brightness and low cost.

The first aspect of the utility model provides a kind of tablet computer, including processor and LCD connected to the processor Show equipment, the LCD display device includes back light source structure and LCD mould group, and the back light source structure includes backboard, successively sets It sets the reflector on backboard, light guide plate and brightness enhancement film and multiple LED illuminating parts of light guide plate side is set, further include setting The optical color conversion film between the light guide plate and brightness enhancement film is set, the optical color conversion film includes that resin base membrane layer and setting exist The coating layer of resin base membrane layer upper and lower surfaces, the resin base membrane layer include containing feux rouges organic fluorescence transition material Resin basement membrane；The LED illuminating part includes LED chip and the envelope containing green phosphor fluorescent powder that is arranged in LED chip Fill glue-line.

Further, the luminescence peak of the feux rouges organic fluorescence transition material is 615-625nm, and the green phosphor is glimmering The luminescence peak of light powder is 520-530nm.

Further, the feux rouges organic fluorescence transition material focuses on 1/100000-1/ with respect to the mass ratio of resin basement membrane Between 10000；The mass ratio of the relatively described encapsulation glue-line of the green phosphor fluorescent powder focuses between 20%-50%.

Further, the LED chip is blue-light LED chip.

Further, the luminescence peak of the blue-light LED chip is 400-500nm.

Further, the luminescence peak of the blue-light LED chip is 440-450nm.

Further, the coating layer include be adhered to the corresponding resin basement membrane layer surface solidification colloid layer and It is evenly distributed to the multiple diffused components solidified in colloid layer.

Further, the diffused component includes diffusion particle, and the diameter of the diffusion particle is 2-30 μm.

Further, the resin basement membrane with a thickness of 45-55 μm.

The second aspect of the utility model provides a kind of LCD display device, including back light source structure and LCD mould group, described Back light source structure includes backboard, the reflector being successively set on backboard, light guide plate and brightness enhancement film and is arranged in light guide plate one Multiple LED illuminating parts of side further include the optical color conversion film being arranged between the light guide plate and brightness enhancement film, the Color Conversion Film includes resin base membrane layer and the coating layer that resin base membrane layer upper and lower surfaces are arranged in, and the resin base membrane layer includes Resin basement membrane containing feux rouges organic fluorescence transition material；The LED illuminating part includes LED chip and is arranged in LED chip On the encapsulation glue-line containing green phosphor fluorescent powder.

Implement the utility model, excitation purity, light efficiency, brightness, light transmittance and the NTSC color gamut of the white light of sending can be improved, it can Color rendition degree is significantly promoted, low energy consumption, energy conservation and environmental protection, at low cost.

[Detailed description of the invention]

Fig. 1 is a kind of block diagram representation for tablet computer that an embodiment of the present invention provides；

Fig. 2 is the decomposition diagram of the back light source structure of the LCD display device of tablet computer 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 embodiment]

The utility model will be further described with reference to the accompanying drawings and examples.

With reference to Fig. 1, an embodiment of the present invention provide a kind of tablet computer, including processor 1 and with processor 1 Memory 2, wireless communication module 3, LCD display device 4, the power module 5 for powering to tablet computer of connection.

With reference to Fig. 2, LCD display device 4 includes back light source structure and the LCD mould group being arranged on back light source structure (figure On be not shown).Back light source structure provides backlight to LCD mould group.Back light source structure includes backboard 10, is successively set on backboard 10 Reflector 11, light guide plate 12, optical color conversion film 13 and brightness enhancement film 14 and be arranged in 12 side of light guide plate to light guide plate 12 Multiple LED illuminating parts 15 of level projection.LED illuminating part 15 it is luminous in the horizontal direction (that is, the plane side where light guide plate 12 To) enter light guide plate 12, vertical direction transmitting (that is, perpendicular to direction of light guide plate 12) is converted in light guide plate 12.It is reflective Plate 11 is reflected for the opposite lower light emitted to guarantee that all light all emit upwards.Optical color conversion film 13 is used for will be from leaded light The light that 12 Vertical Launch of plate comes out carries out Color Conversion and the light for coming out Vertical Launch is evenly distributed in entire plane.Blast Film 14 is used to switch to the light of oblique transmitting to emit to surface.

LED illuminating part 15 includes LED chip and the packaging plastic containing green phosphor fluorescent powder being arranged in LED chip Layer.

LED chip is preferably blue-light LED chip.The luminescence peak of blue-light LED chip is 400-500nm (nanometer), this reality The luminescence peak for applying a blue-light LED chip is preferably 440-450nm.

Green phosphor fluorescent powder is made of silicate material or aluminates system material.Green phosphor fluorescent powder is opposite to be encapsulated The mass ratio of glue-line focuses between 20%-50%.The luminescence peak of green phosphor fluorescent powder is 520-530nm, and in 440- 450nm wavelength period has stronger light absorpting ability.Green phosphor fluorescent powder can be by the physics mode of luminescence generated by light by blue-ray LED The some blue light that chip is issued is changed into green light.

With reference to Fig. 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.

Coating layer 132 includes being adhered to the solidification colloid layer 133 on corresponding 131 surface of resin base membrane layer and being uniformly distributed To the multiple diffused components 134 solidified in colloid layer 133.The number of diffused component 134 can be according to the reality of resin base membrane layer 131 Size is configured.Solidify colloid layer 133 for diffused component 134 to be fixedly attached to the surface of resin base membrane layer 131.Solidification Colloid layer 133 includes solidification colloid.Solidify colloid and preferably bind resin, bonding resin has good ultra-violet curing or thermosetting The characteristic of change, convenient for solidification.Diffused component 134 spreads light uniformly for having an impact to the transmission of light and diverging.Expand Dissipating element 134 includes diffusion particle.Diffusion particle is preferably PMMA (polymethyl methacrylate) particle or PS (polystyrene) Particle etc..The diameter of diffusion particle is 2-30 μm, preferably 15 μm.Type, the diameter of diffusion particle can be according to realities Border situation is selected.

Resin base membrane layer 131 includes the resin basement membrane containing feux rouges organic fluorescence transition material.Resin basement membrane is preferably saturating Light rate is higher than 90% thin polymer film, such as polyester (PET) film, and light transmission is good, at low cost.Resin basement membrane with a thickness of 45-55 μm (micron), preferably 50 μm.The thickness of resin basement membrane can be selected according to the actual situation.

Resin basement membrane is produced as follows: resin basement membrane the masterbatch such as masterbatch of polyester (PET) film and feux rouges are had Machine fluorescence transition material mixes, and by stirring or shaking, is sufficiently mixed the two in the solid state, then mixture is heated It to molten condition, stirs repeatedly, is evenly distributed on feux rouges organic fluorescence transition material in the resin basement membrane masterbatch of melting, then adopt It is made with conventional resin basement membrane preparation method such as rolling process, the tape casting, blow moulding, pulling method etc..

Feux rouges organic fluorescence transition material focuses between 1/100000-1/10000 with respect to the mass ratio of resin basement membrane.Feux rouges The luminescence peak of organic fluorescence transition material is 615-625nm, and has stronger light absorpting ability in 530-550nm wavelength period. Feux rouges organic fluorescence transition material blue-light LED chip can be emitted and through the light guide plate 12 some blue lights launched by photic Luminous mode is changed into red emission.In actual application, by adjusting feux rouges organic fluorescence transition material and green The ratio of inorganic fluorescent powder is, it can be achieved that emit the blue and green light and feux rouges of standard proportional.The indigo plant emitted by blue-light LED chip The green light composition back light source structure of light, the feux rouges of feux rouges organic fluorescence transition material transformation and the transformation of green phosphor fluorescent powder White-light spectrum.The feux rouges and green phosphor of the blue light, the transformation of feux rouges organic fluorescence transition material that are emitted by blue-light LED chip The green light of fluorescent powder transformation is greatly improved excitation purity, light efficiency and the brightness of the white light of back light source structure, reduces energy consumption, relatively Traditional back light source structure can save the energy consumption of 15%-50%, at low cost, and performance is stablized.And turned by feux rouges organic fluorescence The feux rouges of conversion materials transformation and the green light of green phosphor fluorescent powder transformation there is higher color saturation and colour gamut, it can be achieved that 90% or more NTSC (National Television System Committee) colour gamut.

Fig. 4 be the use of luminescence peak is 440nm blue-light LED chip, luminescence peak be 620nm feux rouges organic fluorescence turn The white light of the back light source structure for the green phosphor phosphor combination that conversion materials and luminescence peak are 530nm in normal operation Spectral curve.Feux rouges organic fluorescence transition material is 1/100000 relative to the quality specific gravity of resin basement membrane, and green phosphor is glimmering Light powder is 30% relative to the quality specific gravity of encapsulation glue-line.In white-light spectrum curve graph, horizontal axis indicates that spectral wavelength shines Peak value, the longitudinal axis indicate spectral intensity.It can be seen from the chart, the white light emitted by the back light source structure of the utility model Spectrum it is wider, distribution more balance, have higher luminous efficiency.

By above-mentioned back light source structure, the LCD display device 4 of the utility model may be implemented >=90% or even 100% NTSC color gamut, and greatly improve the trichromatic excitation purity of RGB, performance is stablized, energy conservation, while the light transmittance of light is obtained To promotion, light transmittance can promote 25% or more.

The LCD display device 4 of the utility model is done into backlight with existing with traditional white light LED backlight structure LCD display device compares, and contrast effect is as shown in the table:

As it can be seen that the LCD display device 4 of the utility model is greatly improved excitation purity, light efficiency, brightness, light transmittance and NTSC Colour gamut, it is practical.

Above embodiments only express preferred embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Therefore it cannot be interpreted as that a limitation on the scope of the patent of the present invention.It should be pointed out that for the ordinary skill of this field For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, such as to each implementation Different characteristic in example is combined, and these are all within the protection scope of the present invention.

Claims (10)

1. a kind of tablet computer, including processor and LCD display device connected to the processor, the LCD display device packet Back light source structure and LCD mould group are included, the back light source structure includes backboard, the reflector being successively set on backboard, light guide plate With brightness enhancement film and multiple LED illuminating parts of light guide plate side are set, it is characterised in that: further include being arranged in the light guide plate Optical color conversion film between brightness enhancement film, the optical color conversion film include resin base membrane layer and the setting table on resin base membrane layer The coating layer in face and lower surface, the resin base membrane layer include the resin basement membrane containing feux rouges organic fluorescence transition material；It is described LED illuminating part includes LED chip and the encapsulation glue-line containing green phosphor fluorescent powder that is arranged in LED chip.

2. tablet computer according to claim 1, it is characterised in that: the glow peak of the feux rouges organic fluorescence transition material Value is 615-625nm, and the luminescence peak of the green phosphor fluorescent powder is 520-530nm.

3. tablet computer according to claim 1, it is characterised in that: the feux rouges organic fluorescence transition material is with respect to resin The mass ratio of basement membrane focuses between 1/100000-1/10000；The quality of the relatively described encapsulation glue-line of the green phosphor fluorescent powder Specific gravity is between 20%-50%.

4. tablet computer according to claim 1, it is characterised in that: the LED chip is blue-light LED chip.

5. tablet computer according to claim 4, it is characterised in that: the luminescence peak of the blue-light LED chip is 400- 500nm。

6. tablet computer according to claim 5, it is characterised in that: the luminescence peak of the blue-light LED chip is 440- 450nm。

7. tablet computer according to claim 1, it is characterised in that: the coating layer includes being adhered to the corresponding tree Aliphatic radical film surface solidifies colloid layer and is evenly distributed to the multiple diffused components solidified in colloid layer.

8. tablet computer according to claim 7, it is characterised in that: the diffused component includes diffusion particle, the expansion The diameter of shot is 2-30 μm.

9. tablet computer according to claim 1, it is characterised in that: the resin basement membrane with a thickness of 45-55 μm.

10. a kind of LCD display device, including back light source structure and LCD mould group, the back light source structure include backboard, successively set It sets the reflector on backboard, light guide plate and brightness enhancement film and multiple LED illuminating parts of light guide plate side is set, feature exists In: 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 basement membrane Layer and the coating layer that resin base membrane layer upper and lower surfaces are arranged in, the resin base membrane layer include organic glimmering containing feux rouges The resin basement membrane of light conversion material；The LED illuminating part include LED chip and be arranged in LED chip containing green nothing The encapsulation glue-line of machine fluorescent powder.