CN100468163C - Liquid crystal display device - Google Patents

Abstract

The LCD comprises aphototropic module and LCD display panel. The said aphototropic module comprises at least a white light source with at least three peak value of the light spectrum. The said LCD panel comprises colorful filtering substrate, opposite substrate and crystalline layer. Between the colorful filtering substrate and opposite substrate, the said color filtering substrate having blue, green and red filtering layer, with the said color filter substrate and the said aphototropic module meeting the following relationship: (1)605sigma555 BL(lambada)*CFRed(lambada)*Deltlambada<=6. 0; (2)630sigma580 BL(lambada)*CFGreen(lambada)*Deltlambada<=3. 5; (3)580sigma505 BL(lambada)*CFBlue(lambada)*Deltlambada<=3. 5. The said aphototropic module has the biggest luminance value under a certain wavelength of 1. 0, BL(lambada) showing luminance frequency spectrum of the wavelength after normalization, CFBlue(lambada), CFGreen(lambada),CFRed(lambada) representing the penetration ratio of the color filter substrate to blue, green and red filter layer, with Deltlambada meaning the wavelength interval.

Description

LCD

Technical field

The present invention relates to a kind of display, and be particularly related to a kind of LCD with high color saturation.

Background technology

(Thin Film Transistor Liquid Crystal Display TFT-LCD) becomes the main flow of display gradually to have the Thin Film Transistor-LCD of high image quality, preferable space availability ratio, low consumpting power, advantageous characteristic such as radiationless.In order to realize high color rendition (CcolorRreproduction), on televisor or watch-dog, generally adopt at present, use CCFL (ColdCathode Fluorescent Lamp, cathode fluorescent tube) to make backlight module.If with (the National Television System Committee of NTSC, NTSC) ordered standard is weighed color saturation, for utilizing CCFL to make the LCD of backlight module, its color saturation all can reach NTSC more than 72%.Yet for hand-held or pocket device, such as mobile phone, color saturation of LCD still is apparent not enough on it.In order to satisfy user's user demand in the future, each manufacturer all is devoted to the exploitation of high color reproducing technology, and the exploitation of high color reproducing technology is main and backlight liquid crystal display module and colored optical filtering substrates are closely related.

In high color reproducing technology exploitation, the kind of backlight module is being played the part of important role.At present with white light LEDs (Light Emitting Diode, light emitting diode) backlight module of kind is most popular, this is because advantages such as described white light LEDs has direct drive, response is fast, volume is little, the life-span is long, simple in structure and radiationless pollutions, so it is widely used in the backlight module of pocket device already.The white light LEDs backlight module that is widely used at present add that with blue-ray LED the combination of YAG (Yttrium Aluminum Garnet, yttrium aluminum garnet) fluorescent powder constitutes white light mostly, but this kind light source has the shortcoming of colour rendering difference.More particularly, when the color saturation of LCD improved, correspondingly its brightness meeting declined to a great extent.Therefore, the white light LEDs that is combined by RGB LED is suggested in succession, and the individual waves segment table that this kind light source has red R, green G, three kinds of colors of blue B shows, and can reach easily and reach the target that improves color saturation.But, use RGB LED not only can enlarge the volume of backlight module simultaneously, also can improve the complexity of control circuit simultaneously, and then cause the increase of production cost.

In sum, under the restriction of limited backlight module volume and simple control circuit, existing LCD can't realize high color saturation, and then influences the quality of the full-color demonstration of its high color.

Summary of the invention

In view of this, the object of the invention provides a kind of LCD with high color saturation.

In order to achieve the above object, the present invention proposes a kind of LCD, and this LCD comprises backlight module and display panels.This backlight module includes at least one white point light source, comprises three peak values at least in the spectrum that this at least one white point light source is sent.This display panels is configured in the top of this backlight module, and this display panels comprises colored optical filtering substrates, subtend substrate and liquid crystal layer, wherein this liquid crystal layer is configured between this colored optical filtering substrates and this subtend substrate, and this colored optical filtering substrates includes blue color filter layer, green filter layer and red filter layer at least, and this colored optical filtering substrates and this backlight module satisfy following relationship:

(1) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;6.0;$

(2) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5;$

(3) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5;$

(4) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;11.0;$

(5) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;12.6.$

Wherein this backlight module has high-high brightness under a wavelength, and this high-high brightness is decided to be 1.0, and BL (λ) represents that each wavelength light is at quilt normalization (normalized) luminance spectrum afterwards, CF _Blue(λ) represent penetrance, the CF of each wavelength light for the blue color filter layer in this colored optical filtering substrates _Green(λ) represent the penetrance of each wavelength light for the green filter layer in this colored optical filtering substrates, CF _Red(λ) represent the penetrance of each wavelength light for the red filter layer in this colored optical filtering substrates, Δ λ is the wavelength interval.

In a preferred embodiment of the invention, described red filter layer and described backlight module further satisfy following relationship:

(6) $1.72\&le;\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.84$

In a preferred embodiment of the invention, described green filter layer and described backlight module further satisfy following relationship:

(7) $1.79\&le;\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.31$

In a preferred embodiment of the invention, described blue color filter layer and described backlight module further satisfy following relationship:

(8) $0.65\&le;\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;2.39$

In a preferred embodiment of the invention, described Δ λ equals 1.

In a preferred embodiment of the invention, described subtend substrate is a thin-film transistor array base-plate.

In a preferred embodiment of the invention, described colored optical filtering substrates is color filter (Color Filter On Array, the COA) substrate, and described subtend substrate is the substrate with shared electrode on the array.

In a preferred embodiment of the invention, colored optical filtering substrates is array (ArrayOn Color Filter, the AOC) substrate, and described subtend substrate is the substrate with shared electrode on the color filter.

In a preferred embodiment of the invention, each described white point light source comprises blue light emitting chip, yttrium aluminum garnet (Yttrium Aluminum Garnet, YAG) fluorescent powder and red light-emitting chip.

In a preferred embodiment of the invention, each described white point light source comprises blue light emitting chip, YAG fluorescent powder and red light fluorescent powder.

In a preferred embodiment of the invention, described blue light emitting chip and described red light-emitting chip are light-emitting diode chip for backlight unit or are the Organic Light Emitting Diode chip.

LCD in the invention described above, mainly in particular range of wavelengths, the product summation that defines regular light source frequency spectrum and colored optical filtering substrates penetrance frequency spectrum satisfies specific magnitude relationship.Therefore, by the frequency spectrum of light source in definition colored optical filtering substrates and the backlight module, can take into account the double standards of high NTSC coefficient and high penetration simultaneously.

For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention is elaborated below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the synoptic diagram of LCD embodiment of the present invention;

Fig. 2 A is the light source spectrogram that the white point light source is sent in the first embodiment of the invention;

Fig. 2 B is CIE 1931 chromatic diagrams of the LCD actual measurement of first embodiment of the invention;

Fig. 3 A is the light source spectrogram that the white point light source is sent in the second embodiment of the invention;

Fig. 3 B is CIE 1931 chromatic diagrams of the LCD actual measurement of second embodiment of the invention;

Fig. 4 A is the light source spectrogram that the white point light source is sent in the third embodiment of the invention;

Fig. 4 B is CIE 1931 chromatic diagrams of the LCD actual measurement of third embodiment of the invention;

Fig. 5 A is the light source spectrogram that the white point light source is sent in the fourth embodiment of the invention;

Fig. 5 B is CIE 1931 chromatic diagrams of the LCD actual measurement of fourth embodiment of the invention;

Fig. 6 A is the light source spectrogram that the white point light source is sent in the fifth embodiment of the invention;

Fig. 6 B is CIE 1931 chromatic diagrams of the LCD actual measurement of fifth embodiment of the invention;

Fig. 7 A is the light source spectrogram that the white point light source is sent in the sixth embodiment of the invention;

Fig. 7 B is CIE 1931 chromatic diagrams of the LCD actual measurement of sixth embodiment of the invention;

Fig. 8 A is the light source spectrogram that the white point light source is sent in the seventh embodiment of the invention;

Fig. 8 B is CIE 1931 chromatic diagrams of the LCD actual measurement of seventh embodiment of the invention.

And each Reference numeral in the above-mentioned accompanying drawing is respectively:

100 expression LCD, 110 expression backlight modules; 112 expression white point light sources, 120 expression display panels, 122 expression colored optical filtering substrates, 122R represents red filter layer, and 122G represents green filter layer, and 122B represents blue color filter layer, 124 expression subtend substrates, 126 expression liquid crystal layers;

R (λ) expression white point light source sends the ruddiness brightness in the spectrum;

G (λ) expression white point light source sends the green glow brightness in the spectrum;

B (λ) expression white point light source sends the blue light brightness in the spectrum.

Embodiment

Fig. 1 is the synoptic diagram of LCD first embodiment of the present invention.In the present embodiment, LCD 100 comprises backlight module 110 and display panels 120.Described backlight module 110 includes at least one white point light source 112, comprises three peak values at least in the spectrum that described white point light source 112 is sent.Described display panels 120 is configured in the top of described backlight module 110, and described display panels 120 comprises colored optical filtering substrates 122, subtend substrate 124 and liquid crystal layer 126.Wherein said liquid crystal layer 126 is configured between described colored optical filtering substrates 122 and the described subtend substrate 124, and described colored optical filtering substrates 122 includes blue color filter layer 122B, green filter layer 122G and red filter layer 122R at least.Simultaneously, described colored optical filtering substrates 122 satisfies following relationship with described backlight module 110:

(1) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;6.0;$

(2) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5;$

(3) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5.$

Wherein, this backlight module 110 has high-high brightness under a wavelength, and this high-high brightness is decided to be 1.0, and BL (λ) represents that each wavelength light is by the luminance spectrum of normalization after (normalized), CF _Blue(λ) represent penetrance, the CF of each wavelength light for described colored optical filtering substrates 122 Smalt filter layer 122B _Green(λ) represent penetrance, the CF of each wavelength light for described colored optical filtering substrates 122 medium green color filtering optical layer 122G _Red(λ) represent the penetrance of each wavelength light for red filter layer 122R in the described colored optical filtering substrates 122, Δ λ represents the wavelength interval.In addition, in order to simplify calculating, described Δ λ is taken as 1 usually, also can be taken as 5 or other numerical value certainly.

Please refer to above-mentioned (1) relational expression, belong to the not enough edge wave segment limit of red purity (such as, wavelength 555-605nm) in, with the backlight module 110 brightness BL (λ) of each wavelength after and the penetrance CF of this wavelength to described red optical filtering substrate 122R by normalization _Red(λ) multiply each other after with all product additions, resulting sum value is less than some particular values.That is to say, the LCD 100 of above-mentioned for satisfying (1) relational expression, light filtering in the edge wave band that wherein red optical filtering substrate 122R can be not enough with red purity is to improve red saturation scale.

In like manner, the LCD 100 of above-mentioned for satisfying (2) relational expression, light filtering in the edge wave band that wherein green filter layer 122G is not enough with green purity is to improve green saturation.

In the same manner, the LCD 100 of above-mentioned for satisfying (3) relational expression, wherein blue color filter layer 122B can be with the light filtering of not enough edge wave band of blue purity, to improve blue saturation.

Like this, when described colored optical filtering substrates 122 satisfies (1), (2), (3) relational expression with described backlight module 110, because the excitation of red R, green G and the blue B triband of each wavelength light after by described LCD 100 is all more than to a certain degree, so the color saturation of described LCD 100 can reach the NTSC coefficient greater than 72% level.

In the present embodiment, the preferable collocation of described red filter layer 122R and described backlight module 110 is to satisfy following relationship:

(6) $1.72\&le;\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.84.$

In addition, the preferable collocation of described green filter layer 122G and described backlight module 110 is to satisfy following relationship:

(7) $1.79\&le;\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.31.$

Moreover the preferable collocation of described blue color filter layer 122B and described backlight module 110 is to satisfy following relationship:

(8) $0.65\&le;\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;2.39.$

In the present embodiment, when described colored optical filtering substrates 122 further satisfied following relationship with described backlight module 110, the penetrance of described LCD 100 can reach certain level:

(4) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;11.0;$

(5) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;12.6.$

Please refer to above-mentioned (4) relational expression, belong to the primary waves segment limit of ruddiness (such as, in the wavelength 605～680nm), with the backlight module 110 brightness BLs (λ) of each wavelength after and the penetrance CF of this wavelength to described red optical filtering substrate 122R by normalization _Red(λ) multiply each other after with all product additions, resulting sum value is greater than some particular values.That is to say, the LCD 100 of above-mentioned for satisfying (4) relational expression, wherein red optical filtering substrate 122R has the higher penetrating rate to the light that belongs to red main wave band.

In like manner, the LCD 100 of above-mentioned for satisfying (5) relational expression, wherein green optical filtering substrate 122G has the higher penetrating rate to the light that belongs to the main wave band of green glow.

In fact, when described colored optical filtering substrates 122 and described backlight module 110 satisfied above-mentioned (1), (2), (3), (4), (5) five relational expressions, the color saturation of not only described LCD 100 can satisfy NTSC〉72% standard; Simultaneously, using (the Commission International Eclairage of International Commission on Illumination, when CIE) ordered standard illuminants (illuminant-C) was measured the penetrance of described colored optical filtering substrates 122, the penetrance of described colored optical filtering substrates 122 also can reach the standard greater than 27.0.

In addition, in the LCD 100 of present embodiment, described subtend substrate 124 is a thin-film transistor array base-plate.Yet in other embodiments, described colored optical filtering substrates 122 is color filter (Color Filter On Array, the COA) substrate, and the substrate of described subtend substrate 124 for having shared electrode on the array.In another embodiment, described colored optical filtering substrates 122 is array (Array On Color Filter, the AOC) substrate, and the substrate of described subtend substrate 124 for having shared electrode on the color filter.

In the LCD 100 of present embodiment, described white point light source 112 selected kinds comprise blue light emitting chip, YAG fluorescent powder and red light-emitting chip.Yet in other embodiments, described white point light source 112 also can comprise blue light emitting chip, YAG fluorescent powder and red light fluorescent powder.The present invention does not limit the kind of selecting for use of described white point light source 112.

In the present embodiment, described blue light emitting chip and red light-emitting chip are light-emitting diode chip for backlight unit.Yet in other embodiments, described blue light emitting chip and red light-emitting chip also can be the chip of Organic Light Emitting Diode chip or other kind.

In the present embodiment, described backlight module 110 is a direct type backlight module.Yet in other embodiments, described backlight module also can be side incident type backlight module, and the present invention does not limit the actual form of implementation of described backlight module 110.

To enumerate a plurality of embodiment below, so that the combination with described backlight module 110 is elaborated to described colored optical filtering substrates 122.

[first embodiment]

The employed colored optical filtering substrates of first embodiment of the invention is sample A, and selected next backlight module with its collocation is sample #1.

Fig. 2 A is the light source spectrogram that the employed white point light source of first embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that first embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1A) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.84;$

(2A) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=3.31;$

(3A) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.35;$

(4A) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=17.13;$

(5A) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=18.61.$

Above-mentioned (1A), (2A), (3A), (4A), (5A) five relational expressions satisfy aforementioned (1), (2), (3), (4), (5) five relational expressions respectively.

And Fig. 2 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of the LCD of first embodiment of the invention.By Fig. 2 B as can be known, the color saturation NTSC of LCD is 72.5% in the first embodiment of the invention, has reached NTSC greater than 72% standard.In addition, the penetrance of using the ordered standard illuminants (illuminant-C) of the CIE of International Commission on Illumination to measure colored optical filtering substrates in the first embodiment of the invention is 27.51, has reached penetrance greater than 27.0 standard.

Generally speaking, known backlight module and colored optical filtering substrates are arranged in pairs or groups and are formed LCD, the numerical value that utilize the numerical value of above-mentioned relation formula (1) calculating gained to be 6.53, to utilize the numerical value of above-mentioned relation formula (2) calculating gained to be 3.76, utilize the numerical value of above-mentioned relation formula (3) calculating gained to be 3.55, utilize the numerical value of above-mentioned relation formula (4) calculating gained to be 8.17, utilizes above-mentioned relation formula (5) to calculate gained is 11.18, is 44.4% and survey the color saturation NTSC of this known LCD on CIE 1931 chromatic diagrams.

Therefore, the color saturation of first embodiment of the invention is better than the performance of known LCD.

[second embodiment]

The employed colored optical filtering substrates of second embodiment of the invention is a sample B, and selected next backlight module with its collocation is sample #2.

Fig. 3 A is the light source spectrogram that the employed white point light source of second embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that second embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1B) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.58;$

(2B) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.05;$

(3B) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=0.65;$

(4B) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=6.86;$

(5B) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=10.32.$

Above-mentioned (1B), (2B), (3B) three relational expressions aforementioned respectively satisfied (1), (2), (3) three relational expressions.

And Fig. 3 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of the LCD of second embodiment of the invention.By Fig. 3 B as can be known, the color saturation NTSC of LCD is 72.3% in the second embodiment of the invention, has reached NTSC greater than 72% standard.Simultaneously, the penetrance of using illuminant-C to measure colored optical filtering substrates in the second embodiment of the invention is 25.23.

[the 3rd embodiment]

The employed colored optical filtering substrates of third embodiment of the invention is sample C, and selected next backlight module with its collocation is sample #3.

Fig. 4 A is the light source spectrogram that the employed white point light source of third embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that third embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1C) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=3.15;$

(2C) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.46;$

(3C) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.09;$

(4C) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=10.69;$

(5C) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=12.54.$

Above-mentioned (1C), (2C), (3C) three relational expressions satisfy aforementioned (1), (2), (3) three relational expressions respectively.

And Fig. 4 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of the LCD of third embodiment of the invention.By Fig. 4 B as can be known, the color saturation NTSC of LCD is 72.6% in the third embodiment of the invention, has reached NTSC greater than 72% standard.Simultaneously, the penetrance of using illuminant-C to measure colored optical filtering substrates in the third embodiment of the invention is 25.86.

[the 4th embodiment]

The employed colored optical filtering substrates of the embodiment of the invention is sample D, and selected next backlight module with its collocation is sample #4.

Fig. 5 A is the light source spectrogram that the employed white point light source of fourth embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that fourth embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1D) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.72;$

(2D) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.79;$

(3D) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.39;$

(4D) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=17.90;$

(5D) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=16.76.$

Above-mentioned (1D), (2D), (3D), (4D), (5D) five relational expressions satisfy aforementioned (1), (2), (3), (4), (5) five relational expressions respectively.

And Fig. 5 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of LCD in the fourth embodiment of the invention.By Fig. 5 B as can be known, the color saturation NTSC of LCD is 78.7% in the fourth embodiment of the invention, has reached NTSC greater than 72% standard.In addition, the penetrance of using illuminant-C to measure colored optical filtering substrates in the fourth embodiment of the invention is 29.22, has reached penetrance greater than 27.0 standard.

[the 5th embodiment]

The employed colored optical filtering substrates of fifth embodiment of the invention is sample E, and selected next backlight module with its collocation is sample #5.

Fig. 6 A is the light source spectrogram that the employed white point light source of fifth embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that fifth embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1E) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.71;$

(2E) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.52;$

(3E) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.89;$

(4E) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=12.13;$

(5E) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=15.17.$

Above-mentioned (1E), (2E), (3E), (4E), (5E) five relational expressions satisfy aforementioned (1), (2), (3), (4), (5) five relational expressions respectively.

And Fig. 6 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of LCD in the fifth embodiment of the invention.By Fig. 6 B as can be known, the color saturation NTSC of LCD is 72.5% in the fifth embodiment of the invention, has reached NTSC greater than 72% standard.In addition, the penetrance of using illuminant-C to measure colored optical filtering substrates in the fifth embodiment of the invention is 28.20, has reached penetrance greater than 27.0 standard.

[the 6th embodiment]

The employed colored optical filtering substrates of sixth embodiment of the invention is sample F, and selected next backlight module with its collocation is sample #2.

Fig. 7 A is the light source spectrogram that the employed white point light source of sixth embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.In the colored optical filtering substrates and backlight module combination that sixth embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1F) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=3.13;$

(2F) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.39;$

(3F) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.36;$

(4F) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=10.93;$

(5F) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=12.57.$

Above-mentioned (1F), (2F), (3F) three relational expressions satisfy aforementioned (1), (2), (3) three relational expressions respectively.

And Fig. 7 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of LCD in the sixth embodiment of the invention.By Fig. 7 B as can be known, the color saturation NTSC of LCD is 72.2% in the sixth embodiment of the invention, has reached NTSC greater than 72% standard.Simultaneously, the penetrance of using illuminant-C to measure colored optical filtering substrates in the sixth embodiment of the invention is 26.33.

[the 7th embodiment]

The employed colored optical filtering substrates of seventh embodiment of the invention is sample G, and selected next backlight module with its collocation is sample #3.

Fig. 8 A is the light source spectrogram that the employed white point light source of seventh embodiment of the invention is sent.Wherein R (λ), G (λ), B (λ) represent three brightness peaks of ruddiness, green glow and blue light in the spectrum that the white point light source sent respectively, and BL (λ) represents that each wavelength light is by normalization (normalized) brightness afterwards.

In the colored optical filtering substrates and backlight module combination that seventh embodiment of the invention is arranged in pairs or groups, to calculate respectively in designated wavelength range, the product summation of colored optical filtering substrates penetrance frequency spectrum and backlight module frequency spectrum is as follows:

(1G) $\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=2.60;$

(2G) $\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=1.89;$

(3G) $\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=0.87;$

(4G) $\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=7.01;$

(5G) $\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;{\mathrm{CF}}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}=10.24.$

Above-mentioned (1G), (2G), (3G) three relational expressions satisfy aforementioned (1), (2), (3) three relational expressions respectively.

And Fig. 8 B is actual measurement CIE 1931 chromatic diagrams (CIE 1931 Chromaticity Diagram) of LCD in the seventh embodiment of the invention.By Fig. 8 B as can be known, the color saturation NTSC of LCD is 72.5% in the seventh embodiment of the invention, has reached NTSC greater than 72% standard.Simultaneously, the penetrance of using illuminant-C to measure colored optical filtering substrates in the seventh embodiment of the invention is 25.53.

In sum, when the collocation of each chromatic filter layer (comprising red filter layer, blue color filter layer and green filter layer) and described backlight module relation satisfied (1), (2), (3) three relational expressions in the colored optical filtering substrates described in the LCD of the present invention, the color saturation of this LCD can reach NTSC greater than 72% level.According to the suitable backlight module of this standard application described each chromatic filter layer of arranging in pairs or groups, can be before this LCD of follow-up composition, correctly select the collocation of described backlight module and described colored optical filtering substrates for use, reach the high color saturation requirement of LCD.

Though the present invention discloses as above by preferred embodiment, foregoing is not to be used for limiting the present invention.Any those skilled in the art without departing from the spirit and scope of the present invention, revise and retouching when doing some.Therefore, protection scope of the present invention is as the criterion with the scope that appended claims defines.

Claims (13)

1. a LCD is characterized in that, this LCD comprises:

Backlight module includes at least one white point light source, comprises three peak values at least in the spectrum that this at least one white point light source is sent; And

Display panels, be configured in this backlight module top, and this display panels comprises colored optical filtering substrates, subtend substrate and liquid crystal layer, wherein this liquid crystal layer is configured between this colored optical filtering substrates and this subtend substrate, and this colored optical filtering substrates includes blue color filter layer, green filter layer and red filter layer at least, and this colored optical filtering substrates and this backlight module satisfy following relationship:

$\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;6.0,$

$\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5,$

$\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.5;$

Wherein this backlight module has high-high brightness under a wavelength, and this high-high brightness is decided to be 1.0; BL (λ) represents that each wavelength light is by the luminance spectrum after the normalization, CF _Blue(λ) represent penetrance, the CF of each wavelength light for blue color filter layer described in this colored optical filtering substrates _Green(λ) represent penetrance, the CF of each wavelength light for green filter layer described in this colored optical filtering substrates _Red(λ) represent the penetrance of each wavelength light for red filter layer described in this colored optical filtering substrates, Δ λ represents the wavelength interval;

Wherein said colored optical filtering substrates and described backlight module further satisfy following relationship:

$\underset{605}{\overset{680}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;11.0,$

$\underset{500}{\overset{560}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&GreaterEqual;12.6.$

2. LCD as claimed in claim 1 is characterized in that, described red filter layer and described backlight module further satisfy following relationship:

$1.72\&le;\underset{555}{\overset{605}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Red}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.84.$

3. LCD as claimed in claim 1 is characterized in that, described green filter layer and described backlight module further satisfy following relationship:

$1.79\&le;\underset{580}{\overset{630}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Green}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;3.31.$

4. LCD as claimed in claim 1 is characterized in that, described blue color filter layer and described backlight module further satisfy following relationship:

$0.65\&le;\underset{505}{\overset{580}{\mathrm{\&Sigma;}}}\mathrm{BL}\left(\mathrm{\&lambda;}\right)\&times;C{F}_{\mathrm{Blue}}\left(\mathrm{\&lambda;}\right)\&times;\mathrm{\&Delta;\&lambda;}\&le;2.39.$

5. LCD as claimed in claim 1 is characterized in that, described △ λ equals 1.

6. LCD as claimed in claim 1 is characterized in that, described subtend substrate is a thin-film transistor array base-plate.

7. LCD as claimed in claim 1 is characterized in that, described colored optical filtering substrates is the color filter substrate on the array, and described subtend substrate is the substrate with shared electrode.

8. LCD as claimed in claim 1 is characterized in that, described this colored optical filtering substrates is the array base palte on the color filter, and described subtend substrate is the substrate with shared electrode.

9. LCD as claimed in claim 1 is characterized in that, each described white point light source comprises blue light emitting chip, yttrium aluminium garnet fluorescent powder and red light-emitting chip.

10. LCD as claimed in claim 9 is characterized in that, described blue light emitting chip and described red light-emitting chip are light-emitting diode chip for backlight unit, or are the Organic Light Emitting Diode chip.

11. LCD as claimed in claim 1 is characterized in that, each described white point light source comprises blue light emitting chip, yttrium aluminium garnet fluorescent powder and red light fluorescent powder.

12. LCD as claimed in claim 11 is characterized in that, described blue light emitting chip is a light-emitting diode chip for backlight unit, or is the Organic Light Emitting Diode chip.

13. LCD as claimed in claim 1 is characterized in that, described backlight module is a direct type backlight module, or is side incident type backlight module.

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