CN1435716A - Semi-penetration color LCD - Google Patents
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- CN1435716A CN1435716A CN 02103266 CN02103266A CN1435716A CN 1435716 A CN1435716 A CN 1435716A CN 02103266 CN02103266 CN 02103266 CN 02103266 A CN02103266 A CN 02103266A CN 1435716 A CN1435716 A CN 1435716A
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Abstract
A semi-penetrating color LCD is characterized by that its white back light source is composed of several narrow-bandwidth monochromatic light source and the color filters for showing colors are designed according to the wavelength of each monochromatic light source, that is, the own monochromatic light can pass through it and thers are selectively absorbed. Its advantages are high reflectivity and high color purity.
Description
Technical field
The present invention is relevant a kind of colour liquid crystal display device (Liquid Crystal Display, LCD), particularly reach half penetrated (transflective mod) color liquid crystal display arrangement that is penetrating the display effect that has high color purity (color saturation) under the pattern with under reflective-mode, having high reflection standard about a kind of while.
Background technology
LCD is the photovoltaic that is used for showing, wherein super twist nematic liquid crystal display (STN LCD) is the mainstream technology of portable electronic product (as: mobile phone, PDA, electronic dictionary or the like) display; And membrane transistor LCD (TFT LCD) also almost is the unique selection of the display on the notebook computer.The LCD of desktop PC, its thickness probably has only 20% of traditional crt display, weight also has only 10%, can significantly save the space, except thin thickness in light weight, the LCD screen can not glimmer, and does not have radiation and power consumption is low yet, so more and more be received by the market.
The portable electronic product as mobile phone, PDA etc., generally all uses half penetrated LCD.Half penetrated LCD in indoor or dark place, can highlight by backlight, at outdoor or bright place, then can turn off the effect that reaches power saving backlight; What is more, and (under the sunlight as bright spring day) half penetrated LCD keeps good display effect under high light, but the LCD of penetration (as present common notebook computer), often because brightness is not enough and overshadowed.Half penetrated LCD is with the readability under power saving and the sunlight (sun lightreadable), surely according to the status of the main flow display technique of portable electronic product.
For half penetrated colour liquid crystal display device, present known techniques is to get a compromise equilibrium point between the reflectivity of reflective-mode and excitation, often sacrifice excitation and yield to reflectivity, the result is that the excitation of reflective-mode can be accepted reluctantly, sacrificing maximum is excitation under the pattern of penetrating, can't break through.The portable product of high-order as present notebook computer, even because now semi-penetrating LCD excitation can't reach user's requirement, and can't use the pattern of penetrating partly to reach readability under the sunlight.
Summary of the invention
Therefore, the present invention promptly at above-mentioned disappearance, proposes a kind of semi-penetration color LCD that can take into account high reflectance simultaneously and penetrate the display effect of the high color purity under the pattern.
Fundamental purpose of the present invention ties up to and proposes a kind of semi-penetration color LCD, and it ties up under the situation of the display effect of keeping high reflectance, is using the effect that obtains high color purity under the pattern that penetrates backlight simultaneously.
Another object of the present invention is to propose a kind of semi-penetration color LCD, makes it penetrate excitation display effect under the pattern, can not be subjected to the restriction of reflective-mode reflectivity, increases design freedom.
For reaching above-mentioned purpose, the present invention includes a semi-penetrate through type liquid crystal display board, it is made up of transparency carrier toward each other a pair of and that be gripped with liquid crystal layer therebetween at least, and is provided with that some penetrates and the semi-reflective layer of partial reflection effect; One back light, it becomes branch to form by red, green and blue narrow frequency light source at least; And the colored filter of this back light of collocation, be arranged between this two transparency carrier and in the semi-reflective layer top, this color filter is made up of red, green colored color lump with blueness at least, and each color lump respectively is formed with the absorption band of nick shaped.
Thus, remarkable result of the present invention is exactly the penetrance that significantly improves colored filter, to improve the reflectivity of reflective-mode, cooperates narrow frequency light source to penetrate breach simultaneously, can significantly improve the excitation (just enlarging the chromaticity coordinates scope) of the pattern of penetrating.Semi-penetration color LCD proposed by the invention, it is under the situation of the display effect of keeping high reflectance, also the effect that obtains under the backlight mode than high color density can used, to obtain a kind of half-penetration type colour liquid crystal display device that has high brightness and high color density simultaneously, make it all can reach preferable color display effect in reflective-mode and backlight mode following.
Description of drawings
Fig. 1 is a half penetrated STN colour liquid crystal display device structural representation of the present invention;
Fig. 2 is a half penetrated TFT colour liquid crystal display device structural representation of the present invention;
Fig. 3 is the wave spectrum synoptic diagram of the employed back light of the embodiment of the invention;
Fig. 4 is for comparing the spectrum that penetrates of known techniques and the red color lump (Fig. 4 A) of the employed colored filter of the embodiment of the invention, green color lump (Fig. 4 B) and blue color lump (Fig. 4 C);
Fig. 5 compares synoptic diagram for colored filter of the present invention and the chroma coordinate (CIE color coordinate) that penetrates under the pattern.
The figure number explanation:
10, STN colour liquid crystal display device 11, last polaroid
12, go up compensating plate 13, diffusion layer
14, upper substrate 15, transparency electrode
16, both alignment layers 17, liquid crystal layer
18, both alignment layers 19, transparency electrode
20, colored filter 21, semi-reflective layer
22, infrabasal plate 23, following compensating plate
24, down polaroid 25, backlight group
26, back light 27, backlight light-guiding plate
28, color lump 29, black surround lattice
30, TFT colour liquid crystal display device 31, pixel drive element
40, incident light 41, reflected light
42, penetrate light 51, red LED
52, green LED 53, blue led
61, known red color lump spectrum 62, the red color lump spectrum of the present invention
63, known green color lump spectrum 64, the green color lump spectrum of the present invention
65, known blue color lump spectrum 66, the blue color lump spectrum of the present invention
71, absorb the breach 72 of blue-ray LED, the breach of absorption green light LED
73, absorb the breach 74 of blue-ray LED, the breach of absorptive red light LED
75, absorb the breach 76 of green light LED, the breach of absorptive red light LED
81, chroma coordinate 82 of the present invention, colored filter chroma coordinate
Embodiment
Fig. 1 is the simple structure synoptic diagram of half penetrated super twist thread (STN) colour liquid crystal display device, as shown in the figure, the structural representation that it is watched by illustrated top with the beholder, one half penetrated STN colour liquid crystal display device 10, comprise a pair of transparency carrier respect to one another (substrate), upper substrate 14 and infrabasal plate 22, commonly used is transparent glass substrate or constituted by other transparent materials, two transparency carriers the 14, the 22nd with the relation configuration of parallel interval up and down, are gripped with a liquid crystal layer 17 between this two transparency carrier 14,22.Post compensating plate 12 (Phaseretardation film, compensating plate is cooked compensation to chromatic dispersion, also the effect of improving the visual angle can be arranged) and last polaroid 11 (polarizer) above the upper substrate 14.Usually adding thick son among polaroid 11 and compensating plate 12 conform to the solid of upper substrate 14 and cause the light scatter effect, is to be diffusion layer 13 (scattering process also can place semi-reflective layer 21 sometimes or place the protective seam of colored filter).Upper substrate 14 is to the face of liquid crystal layer 17, one transparency electrode 15 is set, material commonly used is ITO (indium tinoxide), be responsible for providing voltage, control liquid crystal molecule direction, covering one deck both alignment layers 16 outside the transparency electrode 15, and then is exactly liquid crystal layer 17, and both alignment layers 16 is responsible for the directions of guiding liquid crystal molecules.
Next-door neighbour's liquid crystal layer 17 belows are the both alignment layers 18 of infrabasal plate 22, its below is the transparency electrode 19 of infrabasal plate 22, again is colored filter 20, be responsible for to produce color (also have colored filter is placed the liquid crystal layer top), next is a semi-reflective layer 21 (semi-reflective layer also can place under the infrabasal plate 22, perhaps also can be with the following polaroid 24 that includes semi-reflective layer).The incident light 40 of a part is reflected into reflected light 41 by semi-reflective layer 21, and semi-reflective layer 21 also can allow a part backlight penetrate to become simultaneously and penetrate light 42.The outside surface of infrabasal plate 22 posts down compensating plate 23 (inessential, on design decide) and following polaroid 24 (including semi-reflective layer 21 sometimes).The below is backlight group 25, is made up of back light 26 and backlight light-guiding plate 27 usually, and backlight light-guiding plate 27 is evenly distributed to whole viewing area with the light of back light 26; Also light source directly can be placed the display panel below.
Fig. 2 is the simple structure synoptic diagram of half penetrated membrane transistor (TFT) colour liquid crystal display device 30, and as shown in the figure, except pixel drive element 31, basic framework and Fig. 1 difference are little.From top to bottom be in regular turn: go up polaroid 11; last compensating plate 12; (scattering process also can place semi-reflective layer to diffusion layer 13 sometimes; or place the protective seam of colored filter); upper substrate 14; colored filter 20 (also can place on the semi-reflective layer of infrabasal plate) to avoid combined error; transparency electrode 15; both alignment layers 16; liquid crystal layer 17 (liquid crystal design that TFT is commonly used is different with STN); both alignment layers 18; transparency electrode 19; semi-reflective layer 21 and the pixel drive element 31 of being responsible for driving indivedual picture elements; be infrabasal plate 22 then; following compensating plate 23; following polaroid 24; be backlight group 25 at last.
Wherein, employed back light 26 is to adopt emitting red light diode (LED) 51, green LED 52 and blue led 53 in above-mentioned backlight group 25 embodiment, as shown in Figure 3, be the wave spectrum synoptic diagram of employed red, the green and white backlight light source that blue-light-emitting diode 51,52,53 is formed of the embodiment of the invention.According to principle of the present invention, the wavelength of light source is selected and unrestricted, but be the best with red, green and blue three primary colors, also to consider LED element luminescence efficiency and visual brightness effects or the like factor.That the embodiment of the invention is used is red, green, and blue three common light-emittingdiodes, and wavelength peak falls within red 615 how rice (nm), green 525nm and blue 470nm respectively.
Fig. 4 A is the spectrum that penetrates of the red color lump of relatively known techniques and the employed colored filter of the embodiment of the invention.The red color lump of known employed colored filter penetrate spectrum 61, at red wavelength high penetration (average about 85%) is arranged, the wavelength beyond redness also has not low penetrance (average about 40%).The red color lump of the embodiment of the invention penetrate spectrum 62, major part can be continued to use the existing spectrum that penetrates, and just at the emission wavelength place of green and blue led, needs the breach that penetrates of painstakingly design, strengthens absorbing the luminous of these two light-emittingdiodes; Absorb the breach 71 of blue light, the wavelength valley falls within 470nm, absorbs the breach 72 of green glow, and the wavelength valley falls within 525nm.Absorb the wavelength valley of breach and the wavelength peak of light-emittingdiode, and may not be certain in full accord; Especially absorb the design of gap width, should be slightly wideer than the luminous width of LED, allow the volume production range of variation of LED emission wavelength.
Fig. 4 B is the spectrum that penetrates of the green color lump of relatively known techniques and the employed colored filter of the embodiment of the invention.The green color lump of known employed colored filter penetrate spectrum 63, at green wavelength high penetration (average about 83%) is arranged, the wavelength beyond green also has not low penetrance (average about 35%).The green color lump of the embodiment of the invention penetrate spectrum 64, major part can be continued to use the existing spectrum that penetrates, and just at the emission wavelength place of redness and blue led, needs the breach that penetrates of painstakingly design, strengthens absorbing the luminous of these two light-emittingdiodes; The breach 74 of absorptive red light, the wavelength valley falls within 615nm, absorbs the breach 73 of blue light, and the wavelength valley falls within 470nm.Absorb the wavelength valley of breach and the wavelength peak of light-emittingdiode, and may not be certain in full accord; Especially absorb the design of gap width, should be slightly wideer than the luminous width of LED, allow the volume production range of variation of LED emission wavelength.
Fig. 4 C is the spectrum that penetrates of the blue color lump of relatively known techniques and the employed colored filter of the embodiment of the invention.The blue color lump of the employed colored filter of known techniques penetrate spectrum 65, at blue wavelength high penetration (average about 80%) is arranged, the wavelength beyond blueness also has not low penetrance (average about 30%).The blue color lump of the embodiment of the invention penetrate spectrum 66, major part can be continued to use the existing spectrum that penetrates, and just at the emission wavelength place of redness and green LED, needs the breach that penetrates of painstakingly design, strengthens absorbing the luminous of these two light-emittingdiodes; The breach 76 of absorptive red light, the wavelength valley falls within 615nm, absorbs the breach 75 of green glow, and the wavelength valley falls within 525nm.Absorb the wavelength valley of breach and the wavelength peak of light-emittingdiode, and may not be certain in full accord; Especially absorb the design of gap width, should be slightly wideer than the luminous width of LED, allow the volume production range of variation of LED emission wavelength.
Fig. 5 is the chroma coordinate (CIE color coordinate) of the present invention and known techniques synoptic diagram relatively, wherein this CIE color coordinate triangle heal the expression excitation big height more.The embodiment of the invention that is the triangle 82 of dotted line discloses the chroma coordinate scope of the colored filter of (Fig. 4); Solid line triangle 81 is the chroma coordinate scope of using back light (Fig. 3) cooperation colored filter (Fig. 4) analog computation that embodiment disclosed that the embodiment of the invention disclosed.Hence one can see that, and the present invention increases the effect of excitation under the pattern of penetrating apparent.
Because lcd technology is to utilize the media of liquid crystal as the control light condition, to reach a kind of technology of display effect.And along with the progress of science and technology with information, human demand to rich colors, it is indispensable more and more to seem, in order to show the abundant colors message, colored filter (ColorFilter) is used on the colour liquid crystal display device widely, no matter be the STN of passive-matrix or the TFT LCD of active-matrix, the mainstream technology of color monitor all is to use colored filter to produce shades of colour.Colored filter is that the block of cells by many red green blue tricolors rearranges basically, as the color lump 28 of Fig. 1 and Fig. 2, though inessential, with black surround lattice 29 color lump 28 is separated, improves contrast sometimes; Colored filter is to produce the color of wanting by absorbing undesired wavelength: red block absorbs other wavelength, only allows red light penetrate; Green block absorbs other wavelength, only allows green light penetrate; Blue block absorbs other wavelength, only allows blue light penetrate.Each little color lump 28 is controlled penetrance by an exclusive liquid crystal picture element: penetrance is higher, and the contribution of this primary colors is just stronger; By the various combination of strength of red green blue tricolor, the additivity colour mixture effect by eyes just makes us see versicolor demonstration.The arrangement of little color lump generally has vertical bar shape (stripe is as the computer LCD) and two kinds of mosaics (mosaic claims delta to arrange again, as the LCD of digital camera); Traditionally, we are called a picture element with one group of red green blue tricolor when the vertical bar shape is arranged, and each little color lump is called color dot (color dot).
Because half penetrated LCD is with the readability power saving and sunlight under (sun lightreadable), so the status of steady main flow display technique according to the portable electronic product.Semi-penetration color LCD has two kinds of mode of operations: penetrate pattern and reflective-mode.The pattern that penetrates is in order to cooperate the optical design of reflective-mode, and necessary using compensation sheet is in addition similar to the principle of general penetrating LCD below semi-reflective layer; Certainly, its penetrance can be subjected to the influence of semi-reflective layer and reduce; Under reflective-mode, light through first polaroid and compensating plate after, pass liquid crystal layer, after passing through the color lump of colored filter again, part light is reflected by semi-reflective layer, reflected light ray is through same colorized optical filtering moon color lump, liquid crystal layer, compensating plate, at last via first polaroid selection effect, have only the light of part to penetrate, its penetrance equally still by voltage, via the change of liquid crystal molecule direction, reach the Presentation Function of control light and shade, though optic design has difference, ultimate principle still is the same.
Under reflective-mode, because the absorption of colored filter, reflectivity very low (service efficiency of light is very low) in order to improve the reflectivity of display, must improve the penetrance of colored filter.And the method that improves the colored filter penetrance is exactly the absorption that reduces the wavelength of not wanting originally to penetrate, and so excitation will reduce.In other words, in order to improve the reflectivity of display, must painstakingly reduce the excitation of colored filter.The excitation of colored filter has reduced, and the excitation of semi-penetration color LCD has also just reduced certainly, and especially bad, because under reflective-mode, light is through colored filter twice, and excitation is also barely satisfactory; But under the pattern of penetrating, light only passes through colored filter once, and excitation is just poorer.
Half penetrated colour liquid crystal display device, known techniques promptly is to get a compromise equilibrium point between the reflectivity of reflective-mode and excitation, often sacrifice excitation and yield to reflectivity, the result is that the excitation of reflective-mode can be accepted reluctantly, sacrificing maximum is excitation under the pattern of penetrating, can't break through.The present invention promptly at above-mentioned disappearance, proposes a kind of semi-penetration color LCD that can take into account high reflectance simultaneously and penetrate the display effect of the high color purity under the pattern.
The present invention continues to use the mechanism's framework and the liquid crystal optics design of colour liquid crystal display device now, the place of innovation is the spectrum that penetrates of the composition spectrum of (1) back light and (2) colored filter, and any use is backlight all applicatory with colour liquid crystal display device colored filter.
Release clearly for finding the solution, below use more concrete example explanation.
(1) the narrow frequency combined light source of the composition spectrum-one of back light
Between 400 to 750nm, known white backlight light source is made even distribution with spectrum to wavelength of visible light with all exhausting one's ability greatly.The excitation of narrow conversely speaking, frequency light source but is the highest; Except that the purple district, the border of entire I CE color coordinate is exactly by the defined limit of pure color of single-frequency light source.Back light used in the present invention is made up of several narrow frequency light sources exactly, and for example: the excitation of common LCD has been quite high, and the present invention selects red, green, blue three LEDs for use, adjusts suitable relative intensity and forms white light source (joining shown in Figure 3).Such light source is mixed colored filter now, and effect is not remarkable in fact; Because only be so, and can't allow any one monochromatic source that the chance that manifests is separately arranged.
(2) spectrum-one that penetrates of colored filter contains the colored filter that narrow frequency absorbs
For making any one monochromatic source that the chance that manifests separately all be arranged, the penetrating spectrum and must cooperate modification of colored filter.Light source with red, green, blue three LEDs is an example, and when desire shows when pure red, LCD will block by blue light with green color lump, and only the LCD picture element corresponding to red color lump penetrates.But when the ruddiness that problem is the red color lump of colored filter allows 95% red LED passes through, also green green glow and blue light with blue led there is about 30% penetrance.Yet this measure will make the ruddiness of very pure red LED watered down by green glow and blue light, and among the present invention, because watering down the green glow and the blue light of ruddiness is two narrow frequency light sources, so as long as revise the spectrum of the red color lump of colored filter, make its wavelength strengthen absorbing, as penetrance is reduced to below 5% at green glow and blue-ray LED.Because what use among the present invention is narrow frequency light source, only specific wavelength is absorbed, also only need do narrow frequency and absorb at specific wavelength.Narrow frequency is absorbed in the absorption band that causes nick shaped on the spectrum that penetrates of colored filter, and to the penetrance of colored filter integral body, influence is little, in other words, penetrates excitation under the pattern when significantly promoting, and can also keep the high reflectance under the reflective-mode.
Above describedly only illustrate with regard to red spectrum, can analogize according to this:,, make its wavelength strengthen absorption at ruddiness and blue-ray LED so must revise the spectrum of the green color lump of colored filter in order to want to show highly purified green.In like manner, in order to want to show highly purified blueness,, make its wavelength strengthen absorbing at ruddiness and green light LED so must revise the spectrum of the blue color lump of colored filter.
With embodiment more specifically, in Fig. 3, the wavelength of red, green, blue three LEDs used in the present invention is respectively 470,525,615nm, all is common LED wavelength.As for the part of colored filter, also the spectrum that penetrates with existing colored filter is starting point, and for convenience of description, we only do necessary modifications.The dotted line of Fig. 4 A be the red color lump of known techniques penetrate spectrum 61, the present invention will penetrate one modification of spectrum do makes red color lump add the strong selectivity absorption to green with blue led, penetrating spectrum becomes shown in the solid line 62 of Fig. 4 A, penetrate spectrum and be nick shaped 71,72 with blueness green, the wavelength valley falls within 470 and 525nm respectively, the wavelength peak of just colored and blue led luminescent spectrum.In fact, the valley of absorption does not need just to drop on the peak value of LED, as long as can strengthen absorbing with blue led to green, just can obtain to strengthen the effect of red excitation.
In like manner, the dotted line of Fig. 4 B be the green color lump of known techniques penetrate spectrum 63, the present invention will penetrate one modification of spectrum do makes green color lump add the strong selectivity absorption to red with blue led, penetrate spectrum for shown in the solid line 64 of Fig. 4 B, penetrate spectrum and be nick shaped 73,74 with redness blue, the wavelength valley falls within 470 and 615nm respectively, the wavelength peak of just blue and red LED luminescent spectrum.Certainly, the valley of absorption does not need just to drop on the peak value of LED, as long as can strengthen absorbing with red LED to blue, just can obtain to strengthen the effect of green excitation.The dotted line of Fig. 4 C be the blue color lump of known techniques penetrate spectrum 65, the present invention will penetrate one modification of spectrum do makes blue color lump add the strong selectivity absorption to red with green LED, penetrate spectrum for shown in the solid line 66 of Fig. 4 C, penetrate spectrum and be nick shaped 75,76 with redness green, the wavelength valley falls within 525 and 615nm respectively, the wavelength peak of just green and red LED luminescent spectrum.Same, the valley of absorption does not need just to drop on the peak value of LED, as long as can strengthen absorbing with green LED to red, just can obtain to strengthen the effect of blue excitation.
The broken line triangle 82 of Fig. 5 is the chromaticity coordinates synoptic diagram of the invention described above colored filter under the D65 standard sources, the solid line triangle 81 of Fig. 5 is the back light chromaticity coordinates synoptic diagram afterwards that same colored filter cooperates above-mentioned red, green, blue three LEDs, can know thus and find out that the present invention strengthens the effect of excitation.In addition, the spectrum of colored filter in the foregoing description is starting point with the spectrum that penetrates of existing colored filter, and for convenience of description, the present invention only does necessary modifications; In fact colored filter can also remake more modifications, reaches more significant effect.In particular, the present invention can keep absorbing under the condition of breach, increase the average penetration rate of each color lump, its effect is to improve the penetrance of colored filter, also can dwindle simultaneously the scope of broken line triangle, the inner feelings of selecting of penetrance that this is just known and excitation is compromised, if use known techniques, excitation under the pattern of penetrating has also just been reduced by compromise, but the present invention but can keep the leg-of-mutton scope of solid line constant.
In other words, the present invention can be with the chromaticity coordinates and the chromaticity coordinates independent design that penetrates under the pattern of colored filter itself.Penetrate the design of the chromaticity coordinates under the pattern, narrow frequency light source and colored filter penetrate breach and decide; The design of the chromaticity coordinates under the reflective-mode, be to compromise and decide, penetrate breach because be that selectivity to narrow frequency light source absorbs, the chromaticity coordinates and the penetrance of integral body by the inner feelings of selecting of the chromaticity coordinates of colored filter itself and penetrance, influence very for a short time, can not cause real restriction.Fundamental purpose of the present invention is exactly significantly to improve the penetrance of colored filter, to improve the reflectivity of reflective-mode, cooperates narrow frequency light source to penetrate breach simultaneously, can significantly improve the excitation (just enlarging the chromaticity coordinates scope) of the pattern of penetrating.
Therefore, semi-penetration color LCD proposed by the invention, it is under the situation of the display effect of keeping high reflectance, also the effect that obtains under the backlight mode than high color density can used, to obtain a kind of half-penetration type colour liquid crystal display device that has high brightness and high color density simultaneously, make it all can reach preferable color display effect in reflective-mode and backlight mode following.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting scope of the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when looking being as the criterion that the claim scope defined.
Claims (10)
1. semi-penetration color LCD is characterized in that: comprising:
One semi-penetrate through type liquid crystal display board is made up of transparency carrier toward each other a pair of and that be gripped with liquid crystal layer therebetween at least, and is provided with that some penetrates and the semi-reflective layer of partial reflection effect;
One back light, the main composition composition of the spectrum in the visible region becomes branch to form by being respectively red, green with blue narrow frequency light source at least, wherein:
(a) wavelength peak of the narrow frequency light source composition of this redness drop on 590-750 how between the rice, wavelength full width at half maximum (Wr) is less than 80 rice how;
(b) wavelength peak of the narrow frequency light source composition of this green drop on 500-560 how between the rice, wavelength full width at half maximum (Wg) is less than 80 rice how; And
(c) wavelength peak of the narrow frequency light source composition of this blueness drop on 400-480 how between the rice, wavelength full width at half maximum (Wb) is less than 80 rice how; And
The colored filter of one this back light of collocation is arranged between this two transparency carrier, and in this semi-reflective layer top, is formed by being respectively red, green and blue colored color lump at least, wherein:
(a) the average penetration rate of spectrum in the red wavelength zone that penetrate of this redness color lump is at least 80%, average penetration rate to other visible wavelengths is Rr, Rr＞20%, and this green and blue narrow frequency light source composition are the selectivity absorption, make red color lump be no more than (0.75 * Rr) respectively green transmitance with blue narrow frequency light source composition;
(b) spectrum that penetrates of this green color lump is at least 80% in the average penetration rate of green wavelength region, average penetration rate to other visible wavelengths is Rg, Rg＞20%, and this redness and blue narrow frequency light source composition are the selectivity absorption, make green color lump be no more than (0.75 * Rg) respectively red transmitance with blue narrow frequency light source composition; And
(c) spectrum that penetrates of this blueness color lump is at least 80% in the average penetration rate of blue wavelength region, average penetration rate to other visible wavelengths is Rb, Rb＞20%, and this green and red narrow frequency light source composition are the selectivity absorption, make blue color lump be no more than (0.75 * Rb) respectively green transmitance with red narrow frequency light source composition.
2. a kind of semi-penetration color LCD according to claim 1 is characterized in that: on the transparency carrier of a slice at least of this display panels, be provided with diode or field effect electric crystal element in order to drive indivedual picture elements.
3. a kind of semi-penetration color LCD according to claim 1 is characterized in that: this display panels uses super twist thread (STN) pattern, and drives in the mode of multiplex's scanning; And this display panels can use twisting thread (TN) pattern in addition.
4. a kind of semi-penetration color LCD according to claim 1 is characterized in that: this back light is through being combined into white, its CIE color coordinate (x, y) satisfy following formula:
(x-0.316)^2+(y-0.320)^2＜(0.08)^2。
5. a kind of semi-penetration color LCD according to claim 1 is characterized in that: this back light is selected from the group that light-emittingdiode, organic light emitting diode, cold cathode fluorescent light-emitting device and el light emitting device (EL electro-luminescence) are formed.
6. a kind of semi-penetration color LCD according to claim 1 is characterized in that: this semi-reflective layer is at this liquid crystal layer and below it between transparency carrier; And this semi-reflective layer also can be arranged under this below transparency carrier.
7. a kind of semi-penetration color LCD according to claim 1 is characterized in that: being made up of red, green and blue narrow frequency light source more than 75% of the main composition composition of this back light.
8. a kind of semi-penetration color LCD according to claim 1 is characterized in that: the wavelength in this red wavelength zone is at 600-700 how between the rice, and these other visible wavelengths are at 400-580 how between the rice.
9. a kind of semi-penetration color LCD according to claim 1 is characterized in that: the wavelength of this green wavelength region is at 500-570 how between the rice, and these other visible wavelengths are at 400-480 how between the rice and 580-700 how between the rice.
10. a kind of semi-penetration color LCD according to claim 1 is characterized in that: the wavelength of this blue wavelength region is at 430-490 how between the rice, and these other visible wavelengths are at 500-700 how between the rice.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100339746C (en) * | 2004-04-06 | 2007-09-26 | 统宝光电股份有限公司 | Semi-reflecting and semi-penetrating liquid-crystal displaying device |
| CN100410751C (en) * | 2003-09-15 | 2008-08-13 | 友达光电股份有限公司 | Liquid crystal display |
| CN1936671B (en) * | 2005-08-05 | 2010-07-28 | 三星电子株式会社 | Liquid crystal display |
| CN101681036B (en) * | 2007-06-05 | 2011-11-16 | 乐金显示有限公司 | Display module and LCD having the same |
| CN101359116B (en) * | 2007-07-31 | 2012-02-29 | 斯坦雷电气株式会社 | Monochromatic liquid crystal display with high contrast ratio |
| CN104285180A (en) * | 2012-05-17 | 2015-01-14 | 夏普株式会社 | Display device |
| CN105911761A (en) * | 2016-06-07 | 2016-08-31 | 武汉华星光电技术有限公司 | Backlight module, liquid crystal panel and liquid crystal display |
| CN107329312A (en) * | 2017-08-14 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of preparation method of array base palte, array base palte and display device |
| CN111051934A (en) * | 2017-09-22 | 2020-04-21 | Dic株式会社 | Light conversion film and image display element using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100437287C (en) * | 2006-05-25 | 2008-11-26 | 友达光电股份有限公司 | High colour expression liquid crystal display |
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2002
- 2002-02-01 CN CN 02103266 patent/CN1206565C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100410751C (en) * | 2003-09-15 | 2008-08-13 | 友达光电股份有限公司 | Liquid crystal display |
| CN100339746C (en) * | 2004-04-06 | 2007-09-26 | 统宝光电股份有限公司 | Semi-reflecting and semi-penetrating liquid-crystal displaying device |
| CN1936671B (en) * | 2005-08-05 | 2010-07-28 | 三星电子株式会社 | Liquid crystal display |
| CN101681036B (en) * | 2007-06-05 | 2011-11-16 | 乐金显示有限公司 | Display module and LCD having the same |
| CN101359116B (en) * | 2007-07-31 | 2012-02-29 | 斯坦雷电气株式会社 | Monochromatic liquid crystal display with high contrast ratio |
| CN104285180A (en) * | 2012-05-17 | 2015-01-14 | 夏普株式会社 | Display device |
| CN105911761A (en) * | 2016-06-07 | 2016-08-31 | 武汉华星光电技术有限公司 | Backlight module, liquid crystal panel and liquid crystal display |
| CN105911761B (en) * | 2016-06-07 | 2019-11-22 | 武汉华星光电技术有限公司 | Backlight module, liquid crystal display panel and liquid crystal display |
| CN107329312A (en) * | 2017-08-14 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of preparation method of array base palte, array base palte and display device |
| CN111051934A (en) * | 2017-09-22 | 2020-04-21 | Dic株式会社 | Light conversion film and image display element using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1206565C (en) | 2005-06-15 |
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Assignee: Kunshan Lingda Optoelectronic Technology Co., Ltd. Assignor: Lingju Sci. & Tech. Co., Ltd. Contract fulfillment period: 2005.6.25 to 2012.1.30 contract change Contract record no.: 2008990000450 Denomination of invention: Semi-penetration color LCD Granted publication date: 20050615 License type: Exclusive license Record date: 2008.9.22 |
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