CN100386683C - Optical module for liquid crystal display and liquid crystal display - Google Patents
Optical module for liquid crystal display and liquid crystal display Download PDFInfo
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- CN100386683C CN100386683C CNB2006100500578A CN200610050057A CN100386683C CN 100386683 C CN100386683 C CN 100386683C CN B2006100500578 A CNB2006100500578 A CN B2006100500578A CN 200610050057 A CN200610050057 A CN 200610050057A CN 100386683 C CN100386683 C CN 100386683C
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Abstract
The present invention discloses a liquid crystal display and an optical module for the liquid crystal display, which is characterized in that a beam pressing sheet and a beam separation sheet are contained, wherein the beam pressing sheet is arranged in front of the background light source of a liquid crystal display screen; the beam separation sheet is arranged in front of the beam pressing sheet; a beam of parallel expanding light beam is divided into a group of fine parallel light beam columns by the beam pressing sheet; a non-polarized fine parallel light beam column is divided into two groups of linear polarized fine parallel light beam columns which are orthogonal mutually by the beam separation sheet, and the linear polarized fine parallel light beam columns are separated to different positions. Since the beam separation sheet is introduced, all polarization direction light energy of the background light source can be used effectively, and the utilization rate is improved by more than one time. If the color separation sheet is introduced, all light energy in the visible light frequency spectrum of the background light source can be used effectively, and the utilization rate is improved by more than three times. Two templates are connected in parallel, and thus, the general light energy utilization rate of the background light source is improved by more than six times; the brightness and the contrast of the liquid crystal display screen are improved obviously, and the energy consumption is reduced obviously. A really meaning liquid crystal display with high brightness and low energy consumption is realized.
Description
Technical field
The present invention relates to a kind of LCD, especially relate to a kind of optical module and LCD that is used for LCD.
Background technology
Existing LCD (LCDs) is widely used in such as in notebook computer, video camera, mobile phone or the like the portable type electronic product as display screen.In these LCD, because liquid crystal itself is not luminous, the imaging of display depends on two kinds in mode: utilize backlight (transmission-type) or utilize physical environment light (reflective) to illuminate screen.Concerning a typical colour liquid crystal display device, the efficiency of light energy utilization of its backlight is only between 5 to 10%.This makes the brightness of display screen of LCD and contrast to be equal to traditional kinescope display screen.In a notebook computer, the electric energy more than 70% is consumed by backlight, and promptly the electric energy more than 60% is wasted in this electronic product.In other words, the principal element of restriction portable type electronic product operational use time is its LCD.
For the low-light level that compensates LCDs and the shortcoming of low contrast, LCD is used the very high backlight of brightness usually.And a large amount of unemployed luminous energy and the heat that causes thus are trapped in the liquid crystal display system, and the life-span of LCD is had a negative impact.This negative effect is particularly serious to the device on the display screen and material such as thin film transistor (TFT) (TFT).In fact, the low backlight efficiency of light energy utilization has been one of technical bottleneck of long-term puzzlement industry member since LCD enters in people's the life, captures this difficult point and will promote the status of LCD in the monitor market greatly.
Fig. 1 has provided the simplified structure diagram of typical transmission-type twisted nematic type (TN) LCD.Wherein liquid crystal display comprises a pair of linear polarizer 11 and 12 that places incident and exit facet respectively, and their polarization direction is quadrature each other.Be clipped in this between the linear polarizer being a pair of glass substrate 13 and 14, wherein 13 for supporting the Active plates of driving circuit (such as thin film transistor (TFT) 15); 14 for supporting the passive plate of three primary colors optical filter.The twisted nematic type liquid crystal molecule (TN-LC) 17 that is clipped between glass substrate 13 and 14 is not having under the situation of external electric field, arrange along the guide layer direction of substrate inboard, wherein the guide layer direction mutually vertical (the Liquid Crystal Molecules Alignment direction that is the plane of incidence is vertical mutually with the molecules align direction of exit facet) on two substrates.Backlight 18 places after the LCDs, and launches white natural light (nonpolarized light) to polaroid 11 directions.
White natural light from backlight 18 sees through the linearly polarized photon that linear polarizer 11 formation luminous energies are less than initial value 50% from the left side.This polarized white light will be filtered into Red Green Blue respectively according to different positions by the optical filter on the passive plate 16 after seeing through liquid crystal layer.Because traditional absorption optical filter is in the specific color of visible spectrum transmission, and absorb other color (energy), polarized white light through remaining luminous energy behind this optical filter less than 1/3 of polarized white light.Its luminous energy not enough original 10% when in fact, the light that sends from backlight 18 arrived beholder's eyeball.It promptly is to compare lower brightness and contrast with other vision instrument (as kinescope) that this defective is reflected on the technical indicator.If regrettably the essential structure of LCD is constant, this bottleneck can't overcome.
Summary of the invention
Technical matters to be solved by this invention provides the LCD of a kind of optical module that is used for LCD of the utilization factor that can improve luminous energy effectively and high brightness, low energy consumption.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of optical module that is used for LCD, it comprises the beam splitting chip before placing the preceding pressure beam slice of liquid crystal screen back light source and placing described pressure beam slice, described pressure beam slice is divided into one group tiny parallel beam row with a branch of parallel extensible beam, described beam splitting chip is divided into two groups of tiny parallel beam row of mutually orthogonal linear polarization with unpolarized tiny parallel beam row, and they are separated to different positions.
Described pressure beam slice can be single template, and this single template is that optical glass or plastics are the different convex lens row of two radius surfaces of material, and its template thickness is a two sides focal length sum.
Described pressure beam slice also can comprise by optical glass or plastics being the major diameter convex lens array and the minor diameter convex lens array of material, described major diameter convex lens array is no gap to be arranged, and adjacent two minor diameter convex lens are isolated by light-locking material in the described minor diameter convex lens array.
Can also be provided with color separation film before the described beam splitting chip, described color separation film is divided into Red Green Blue with white linearly polarized photon, and is refracted to different positions according to color sequences.
Described large and small diameter convex lens array aligns mutually, and their focus is overlapping to form telescopic system.
Described beam splitting chip can be a uniaxial crystal material pattern, its optical axis become with incident beam one greater than 0 °, less than 90 ° of angles.
The liquid crystal molecule that the space orientation macromolecular material that described beam splitting chip also can be clipped by optical glass or plastic base mixes forms, wherein liquid crystal molecule along one become with incident beam greater than 0 °, less than 90 ° of angle directions arrangements.
Described color separation film can be a miniature channel-splitting filter array, it can comprise first kind of primary colors of transmission, reflection second, the first miniature channel-splitting filter of three kinds of primary colors, reflect second kind of primary colors, transmission first, the second miniature channel-splitting filter of three kinds of primary colors and the third primary colors of reflection, transmission first, the 3rd miniature channel-splitting filter of two kinds of primary colors, described miniature channel-splitting filter array can be by first, second, and the three or three miniature channel-splitting filter be one group along the direction continuous repeated arrangement vertical with incident beam or by one second miniature channel-splitting filter be sandwiched between two the first miniature channel-splitting filters be one group along the direction continuous repeated arrangement vertical with incident beam or by one second miniature channel-splitting filter be sandwiched between two the 3rd miniature channel-splitting filters be one group along the direction continuous repeated arrangement vertical with incident beam.
Described beam splitting chip and color separation film can also further be integrated into the beam splitting color chips, described beam splitting color chips is divided into two groups of mutually orthogonal Red Green Blue linearly polarized photons with the unpolarized tiny parallel beam row of white, and is refracted to different positions according to color sequences and polarization state.
Use the LCD of the above-mentioned optical module that is used for LCD, it comprises the data line drive circuit of LCDs and control pixel, described LCDs is provided with a slice linear polarizer, described linear polarizer places the light beam exit facet of described LCDs, and described driving circuit adopts " normal closing " and " often opening " two kinds of opposite drive patterns to the pixel of adjacent two groups of different polarization states.
Compared with prior art, the invention has the advantages that with linear polarizer and three primary colors optical filter in the optical module replacement prior art structure, owing to introduced beam splitting chip, the luminous energy of all polarization directions of backlight all is used effectively, its utilization factor is enhanced about more than once, and owing to introduced color separation film, all luminous energy all is used effectively in the backlight visible light spectrum, its utilization factor improves more than three times, this two template of connecting, the overall efficiency of light energy utilization of present backlight is brought up to more than six times, and the brightness and the contrast of LCDs are significantly improved, and its energy consumption is considerably reduced.And the LCD of using this optical module also is expected to become real high brightness, the LCD of low energy consumption.
Description of drawings
Fig. 1 is the simplified structure sectional view of prior art LCD, 11,12 linear polarizer of putting mutually wherein for pair of orthogonal, 13 and 14 are respectively active and passive glass substrate, 15 is thin film transistor (TFT) (TFT) array, 16 is optical filter, 17 is twisted nematic type liquid crystal (TN-LC) molecule, and 18 is backlight, and arrow and round dot are represented the polarization direction of related device;
Fig. 2 is a schematic cross-section of the present invention, and wherein 21 is pressure beam slice, and 22 is beam splitting chip, and 23 is color separation film;
Fig. 3 (a) is the detailed sectional view of pressure beam slice 21 among Fig. 2, wherein two surfaces are divided into one group tiny parallel beam row by the convex lens array that two different radiis constitute with a branch of parallel extensible beam, the beam splitting ability of this convex lens array is by the radius ratio decision of two convex surfaces 2111 and 2112, and 213 arrays are the secret note arrays that are used to stop the environment diffused light;
Fig. 3 (b) is the optics fundamental diagram of pressure beam slice telescopic system among Fig. 3 (a), B
1And B
2Be respectively the width of light beam of convex lens both sides, the beam splitting ability of convex lens array is B
1: B
2
Fig. 4 (a) is another structural section figure of pressure beam slice 21 among Fig. 2, wherein 211 is the first convex lens array, 212 is the second convex lens array, being provided with of this two array can guarantee a branch of parallel extensible beam is divided into one group tiny parallel beam row, the beam splitting ability of these two convex lens arrays is by the ratio decision of the radius of convex surface separately of two convex lens arrays, and 213 arrays are the secret note arrays that are used to stop the environment diffused light;
Fig. 4 (b) is the optics fundamental diagram of pressure beam slice telescopic system among Fig. 4 (a), B
1, f
1And B
2, f
2Be respectively the width of light beam and the focal length of convex lens array 211 and 212, the beam splitting ability of convex lens array is B
1: B
2
Fig. 5 (a) is the window transmitance synoptic diagram of the liquid crystal display pixel of prior art, and wherein 33 is column electrode (gate electrode), and 34 is row electrode (data electrode), and 35 is thin film transistor (TFT), and 36 for storing electric capacity, and 37 is transparency electrode ITO;
Fig. 5 (b) is the window transmitance synoptic diagram of the liquid crystal display pixel of application module of the present invention, and wherein 33 is column electrode (gate electrode), and 34 is row electrode (data electrode), and 35 is thin film transistor (TFT), and 36 for storing electric capacity, and 37 is transparency electrode ITO;
Fig. 6 (a) is a birefringence beam splitting chip principle of work synoptic diagram;
Fig. 6 (b) is the sectional view of beam splitting chip 22 among Fig. 2, wherein the liquid crystal molecule 223 that is clipped by glass or plastic plate 221,222 along and direction of beam propagation direction proper alignment at angle;
Fig. 7 (a) is the sectional view of color separation film 23 among Fig. 2, wherein three primary colors are refracted to corresponding position by three miniature channel-splitting filters (with the interference filter of 45 ° of placements of relative incident light) according to color sequences, in this structure, 231,232, and 233 be respectively the red, green, blue optical filter; 234 is substrate;
Fig. 7 (b) is the A view of color separation film among Fig. 7 (a);
Fig. 7 (c) is the optics principle of work of color separation film 23, wherein 231,232, and 233 be respectively 45 ° of red, green, blue interference filters;
Fig. 8 (a) is red (indigo plant) look interference filter transmission curve, and is wherein red 45 ° of transmissions, green, blue 45 ° of reflections;
Fig. 8 (b) is green interference filter transmission curve, and is wherein green 45 ° of reflections, red in, blue 45 ° of transmissions;
The color separation film structure of Fig. 9 (a) for only there being two kinds of optical filters (231 and 232) to constitute, wherein color start of chain look is red;
The color separation film structure of Fig. 9 (b) for only there being two kinds of optical filters (232 and 233) to constitute, wherein color start of chain look is blue;
Figure 10 is beam splitting chip 22 and color separation film 23 integrated synoptic diagram, and wherein color separation film 23 is used to form TN-LC liquid crystal beam splitting chip as substrate;
Figure 11 (a) is pressure beam slice 21 and the application of beam splitting chip 22 in LCD, and linear polarization 11 wherein of the prior art is replaced by module of the present invention;
Figure 11 (b) is the further integrated synoptic diagram of Figure 11 (a), and wherein beam splitting chip 22 is used as the passive base board of liquid crystal display;
Figure 12 is pressure beam slice 21, beam splitting chip 22 and the application of color separation film 23 in current LCD, and wherein first linear polarization 11 and filter arrays 16 are replaced by module of the present invention;
Figure 13 is pressure beam slice 21, reaches the application of dichroic beam sheet 24 in current LCD, and wherein first linear polarization 11 and filter arrays 16 are replaced by module of the present invention;
Figure 14 is the further integrated synoptic diagram of Figure 13, and wherein dichroic beam sheet 24 is used as the passive base board of liquid crystal display.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
The optical module that is used for colour liquid crystal display device mainly comprises following three parts as shown in Figure 2: the pressure beam slice 21 that (a) a branch of parallel extensible beam is divided into one group tiny parallel beam row; (b) nonpolarized light is divided into the beam splitting chip 22 of two groups of mutually orthogonal linearly polarized photons; (c) white linearly polarized photon is divided into three primary colors, and is refracted to the color separation film 23 of relevant position according to color sequences.On the other hand, for monochrome liquid crystal display, only need pressure beam slice and beam splitting chip, it is unnecessary that color separation film then becomes.Will be further described below details of the present invention.
Come from a branch of white of backlight, unpolarized, parallel extensible beam at first arrives at the front of pressure beam slice 21, and is divided into one group tiny as shown in Figure 2 parallel beam row.These tiny parallel beams further are divided into two groups of mutually orthogonal linearly polarized photons by beam splitting chip 22.Tiny parallel linear polarized light light beam further is divided into three primary colors by three little channel-splitting filters by transmission and reflection by color separation film 23 time, wherein little channel-splitting filter is set to and incident light angle at 45.Finally, the spectrum that penetrates from pixel is Red Green Blue in corresponding position.
Be that the pressure beam slice 21 of material can be the combination of single template or two templates with optical glass or plastics among Fig. 2.The form of its single template is shown in Fig. 3 (a), and single here template is the different convex lens of two radius surfaces in fact.Shown in Fig. 3 (b), the focus that this single template is designed to its two convex lens is overlapping, so width is B
1Light beam through after this template, according to the system compresses ratio, being compressed to width is B
2Penlight.The ratio of compression of pressure beam slice 21 is the radius ratio of two convex surfaces.
Fig. 4 (a) has provided the pressure beam slice synoptic diagram of being made up of two convex lens arrays 211,212.Two convex lens arrays form typical telescopic system, and its light path system is illustrated by Fig. 4 (b).Similar with Fig. 3, it is overlapping that this convex lens array is designed to the focus of convex lens separately, so width is B
1Light beam through after this template, being compressed to width is B
2Penlight.Single template is identical with the principle of work of two convex lens arrays, and its difference is confocal in glass or plastics media for the former, and the latter's confocal point is then in air.
The width of these tiny parallel beams should equal the pixel wide of liquid crystal display.Owing to the light beam of containing two (black and white screens) or six (color screen) pixels will be compressed in the pixel and transmission, if disregard logical light rate factor, concerning the black-and-white crystal screen, the pressure beam ratio should be 2: 1; And concerning color screen, the pressure beam ratio should be 6: 1.Because it is impure and must suppress that scattered light can cause entering the color of liquid crystal display by color separation film, in these two kinds of structures, 213 are the secret note array that is used to block scattered light transmission pressure beam plate.
The advantage of this design is that the pressure beam of pressure beam slice is than being set to any desirable numerical value.For example, in traditional liquid crystal display device structure since some lighttight zones by secret note array, TFT, and savings electric capacity cover, the logical light rate of pixel is usually less than 60%, so the not all luminous energy that is radiated on the pixel is all effectively utilized.As shown in Figure 5, the logical light rate of pixel is comprised the ratio definition of area (irradiated area) by shadow region area (37-ITO electrode) and dot-and-dash line.Comparison diagram 5 (a) (conventional pixel) and Fig. 5 (b) (pixel of the present invention) are not difficult to find, in the present invention, the logical light rate of pixel can be significantly improved than (making its irradiation area not comprise some lighttight secret note arrays, savings electric capacity or the like zone) by the pressure beam of adjusting pressure beam slice.That is, the denominator of the logical light rate ratio of pixel is significantly reduced.In fact, if count the logical light rate factor of pixel, according to the different pixels structure, the pressure beam of pressure beam slice ratio should be greater than 2: 1 (black and white screen) or 6: 1 (color screen).It is pointed out that all air/glass (plastics) face all needs to plate anti-reflection film to optimize transmittance.
Tiny parallel beam through pressure beam slice shines on the beam splitting chip 22 that is made of birefringent material then.Natural light (nonpolarized light) this sector-meeting of process under specific angle presents " separation " (ordinary light (o) and the extraordinary ray (e) shown in Fig. 6 (a).Its " angle of departure " size is by the crystal orientation of crystal and the birefraction decision of material.To the given angle of departure, separating distance is directly proportional with the thickness of crystal.Therefore, by the thickness of control crystal, the separating distance of beam splitting chip can accurately be designed.If disregard logical light rate factor, concerning the black-and-white crystal screen, the thickness of beam splitting chip should be its separating distance (ultimate range at ordinary light and extraordinary ray center) slightly greater than width of light beam; And concerning color screen, the thickness of beam splitting chip must guarantee its separating distance three times more than or equal to width of light beam, because each Shu Baiguang will be separated into Red Green Blue by color separation film on different positions.
Most typical birefringent material is kalzit, YVO
4, LiNbO
3Or the like, but these crystal are very expensive, and lack large-area birefringence starting material, and everything makes them not be suitable for this application.The present invention utilizes two blocks of glass or plastic plate 221 and 222 to clip sterically defined liquid crystal molecule (SF-PDLC) 223 to constitute beam splitting chip as Fig. 6 (b) shown in, and wherein the high birefringence rate liquid crystal molecule is along the direction arrangement that can produce maximum " angle of departure " and be positioned.Therefore, large tracts of land, beam splitting chip is achieved cheaply.If beam splitting chip is as separating template, its two sides all needs to plate anti-reflection film to optimize transmittance.
O light that separates through beam splitting chip and e light advance to then by one group and are 45 °, are interference filter 231 (red), 232 (green) of substrate, the color separation film 23 of 233 (indigo plants) formation with glass or plastics 234 with incident light homeotropic alignment, its incident angle.The schematic cross-section of this color separation film is shown in Fig. 7 (a) and Fig. 7 (b), and interference filter wherein is the optical technology of ripe and widespread use.Typical interference filter by the non-conductive medium layer of different refractivity alternately stack form.Alternately the thickness and the high and low refractive index of the non-conductive medium layer of stack just can produce desirable interference filter centre wavelength and passband width to control these.
The principle of work of color separation film provides in Fig. 7 (c), and interference filter spectrum wherein provides in Fig. 8 (a) and Fig. 8 (b) respectively.If color start of chain look is red, shown in Fig. 7 (c) and Fig. 8 (a), Red lightscreening plate then the transmits red frequency spectrum in the liquid crystal display pixel, reflection green and blue spectrum simultaneously.Next (green) optical filter reflection green transmission blueness and red spectrum, shown in Fig. 7 (c) and 8 (b), promptly the green that is reflected by first optical filter is reflected in the liquid crystal display pixel at this, and blue spectrum then this optical filter of transmission moves on.When remaining frequency spectrum advanced to last (blueness) optical filter, blue spectrum was reflected in the liquid crystal display pixel at this.So far, three primary colors are separated one by one and are located.In other words, the frequency spectrum that initial optical filter transmission needs, reflect unwanted frequency spectrum, other two optical filters then reflect the unwanted frequency spectrum of frequency spectrum, transmission that needs.
Obviously, Red lightscreening plate (transmits red, reflect other) has the function of blue color filter (reflection blue) in above example.In fact, the tandem compound of two kinds of optical filters can be realized trichromatic separation, red (221) shown in Fig. 9 (a), the combination of green (222) optical filter.In like manner, if initial look be blue, as long as indigo plant (223), green (222) two kinds of optical filters can realize trichromatic separation (Fig. 9 (b)).Production process is further simplified like this, production cost further reduces.Identical with aforesaid beam splitting chip, if color separation film is as separating template, its two sides all needs to plate anti-reflection film to optimize transmittance.
Obviously, need accurately to align between pressure beam slice and the color separation film; Beam splitting chip is then without any need for the alignment measure.Because first optical filter is a transmission-type, second and third optical filter is reflective, and the light beam that comes from pressure beam slice needs accurately overlapping with first optical filter.Any coarse alignment all can cause colourity impure.
From above introduction, be not difficult to find that beam splitting chip and color separation film can further be integrated into single template.Utilize the beam splitting chip structure of color separation film shown in Figure 10 as substrate, and with this template called after beam splitting color chips.In this structure, because the refractive index of macromolecular material, liquid crystal, glass is approaching, the color separation film inner face does not need to plate anti-reflection film.Concerning the combination of two templates, the integrated outside anti-reflection film of also having save original substrate.That is, with respect to the combination of two templates, the beam splitting colour table has been save two anti-reflection film technology, has not only simplified system architecture (three templates are kept to two templates) but also reduced the technology cost.
One of characteristics of the present invention are that it can form the efficiency of light energy utilization that the various combinations different with structure shown in Figure 2 are used to improve backlight of LCD.
Figure 11 (a) has showed the application in the conventional liquid crystal of being combined in of pressure beam slice 21 and beam splitting chip 22.Wherein come from a branch of white of backlight 18, unpolarized, parallel extensible beam through 2: 1 pressure beam slices be divided into one group of 1/2nd former width and with the parallel beam row of width such as pixel.These tiny parallel beams further by beam splitting chip 22 be divided into two groups mutually orthogonal, adjoin, wide linear polarization parallel beam.These tiny parallel beams are as light source incident liquid crystal display active base plate 13.In this structure, pressure beam slice 21 need accurately align with the liquid crystal display pixel, and beam splitting chip 22 is then without any need for the alignment measure.Because the light beam that penetrates from pixel has the polarization state of two kinds of quadratures, the pixel that the drives mode will be set to adjacent two groups of different polarization states adopts opposite drive pattern, and even first group be " normal closing ", and second group is " often opening ".
Figure 11 (b) has showed that beam splitting chip 22 is as the application of liquid crystal display passive base board 14 in conventional liquid crystal.It is identical that the principle of work of this structure and Figure 11 (a) are showed.Wherein, two air/real estates are omitted, so twice anti-reflection film technology is omitted, and system's thickness also is thinned.
Figure 12 has showed that pressure beam slice, beam splitting chip and color separation film are sandwiched in the structure between backlight 18 and the liquid crystal display.In this case, come from a branch of white of backlight 18, unpolarized, parallel extensible beam through 6: 1 pressure beam slices be divided into one group of former width of sixth and with the parallel beam row of width such as pixel.Because be distributed in two polarization states, trichromatic luminous energy must pass through from a pixel wide, the pressure beam ratio of pressure beam slice must reach 6: 1 and the luminous energy of six pixels could be compressed in the pixel wide.These tiny parallel beams further by beam splitting chip 22 be divided into two groups mutually orthogonal, adjoin, wide linear polarization parallel beam.These tiny white polarization parallel light beams are separated into wide Red Green Blue through color separation film 23 then, and quilt location one by one.Then, these tiny coloured polarization parallel light beams are as light source incident liquid crystal display substrate 13.In this case, p-polarization state three primary colors are always adjoining one group of s-polarization state three primary colors for one group.Simultaneously, need accurately to align between pressure beam slice 21, color separation film 23 and liquid crystal display pixel, beam splitting chip 22 is then without any need for the alignment measure.Because the light beam that penetrates from pixel has the polarization state of two kinds of quadratures, the pixel that the drives mode will be set to adjacent two groups of different polarization states adopts opposite drive pattern, and even first group of three pixel be " normal pass ", and second group of three adjacent pixel is " often opening ".
Figure 13 has showed that integrated beam splitting color chips 24 is sandwiched in the structure between backlight 18 and the liquid crystal display.Its principle of work is identical with Figure 12's.But owing to omitted a laminar substrate, thus avoided twice anti-reflection film technology (at the outside surface of beam splitting chip 22, another road is at the outside surface of color separation film 23 together), make system compact more.
Figure 14 has showed integrated beam splitting color chips 24 further integrated as the passive base board of liquid crystal display.On passive base board as shown in figure 14, only there are ground () utmost point sputter, macromolecule oriented film to revolve the plating and the two road main processes that rub, and do not have such as complex techniques processes such as photoetching, optical filter printings.Simultaneously, the beam splitting color chips among the present invention is oriented high molecule liquid crystal template, can bear in the liquid crystal display production run further technology and impact, from but the desirable passive base board of liquid crystal display.
The principle of work of this structure and Figure 12,13 identical.It has further simplified the structure and the corresponding technological process of liquid crystal display, and has promoted its technical indicator.Owing to further moved a laminar substrate, further avoided twice anti-reflection film technology (at the outside surface of color separation film, another road is at the outside surface of liquid crystal display) thereby compare with Figure 13.And compare with Figure 12, it has then moved bilevel substrate (beam splitting chip substrate 222 and liquid crystal display passive base board 14) and four surfaces.
Claims (10)
1. optical module that is used for LCD, it is characterized in that it comprises the beam splitting chip that places the preceding pressure beam slice of liquid crystal screen back light source preceding with placing described pressure beam slice, described pressure beam slice is divided into one group tiny parallel beam row with a branch of parallel extensible beam, described beam splitting chip is divided into two groups of tiny parallel beam row of mutually orthogonal linear polarization with unpolarized tiny parallel beam row, and they are separated to different positions.
2. the optical module that is used for LCD as claimed in claim 1, it is characterized in that described pressure beam slice is single template, this single template is that optical glass or plastics are the different convex lens row of two radius surfaces of material, and its template thickness is a two sides focal length sum.
3. the optical module that is used for LCD as claimed in claim 1, it is characterized in that it is the major diameter convex lens array and the minor diameter convex lens array of material that described pressure beam slice comprises by optical glass or plastics, described major diameter convex lens array is no gap to be arranged, and adjacent two minor diameter convex lens are isolated by light-locking material in the described minor diameter convex lens array.
4. as claim 2 or the 3 described optical modules that are used for LCD, it is characterized in that before described beam splitting chip, being provided with color separation film, described color separation film is divided into Red Green Blue with white linearly polarized photon, and is refracted to different positions according to color sequences.
5. the optical module that is used for LCD as claimed in claim 3 is characterized in that described large and small diameter convex lens array aligns mutually, and their focus is overlapping to form telescopic system.
6. the optical module that is used for LCD as claimed in claim 1 is characterized in that described beam splitting chip is a uniaxial crystal material pattern, its optical axis become with incident beam one greater than 0 °, less than 90 ° of angles.
7. the optical module that is used for LCD as claimed in claim 1, it is characterized in that the liquid crystal molecule that space orientation macromolecular material that described beam splitting chip is clipped by optical glass or plastic base mixes forms, wherein liquid crystal molecule along one become with incident beam greater than 0 °, less than 90 ° of angle directions arrangements.
8. the optical module that is used for LCD as claimed in claim 4, it is characterized in that described color separation film is a miniature channel-splitting filter array, it comprises first kind of primary colors of transmission, reflection second, the first miniature channel-splitting filter of three kinds of primary colors, reflect second kind of primary colors, transmission first, the second miniature channel-splitting filter of three kinds of primary colors and the third primary colors of reflection, transmission first, the 3rd miniature channel-splitting filter of two kinds of primary colors, described miniature channel-splitting filter array is by first, second, and the three or three miniature channel-splitting filter be one group along the direction continuous repeated arrangement vertical with incident beam or by one second miniature channel-splitting filter be sandwiched between two the first miniature channel-splitting filters be one group along the direction continuous repeated arrangement vertical with incident beam or by one second miniature channel-splitting filter be sandwiched between two the 3rd miniature channel-splitting filters be one group along the direction continuous repeated arrangement vertical with incident beam.
9. the optical module that is used for LCD as claimed in claim 4, it is characterized in that described beam splitting chip and color separation film further are integrated into the beam splitting color chips, described beam splitting color chips is divided into two groups of mutually orthogonal Red Green Blue linearly polarized photons with the unpolarized tiny parallel beam row of white, and is refracted to different positions according to color sequences and polarization state.
10. a use such as claim 1 or the 4 described LCD that are used for the optical module of LCD, it is characterized in that it comprises the data line drive circuit of LCDs and control pixel, described LCDs is provided with a slice linear polarizer, described linear polarizer places the light beam exit facet of described LCDs, and described driving circuit adopts " normal closing " and " often opening " two kinds of opposite drive patterns to the pixel of adjacent two groups of different polarization states.
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| CNB2006100500578A CN100386683C (en) | 2006-03-29 | 2006-03-29 | Optical module for liquid crystal display and liquid crystal display |
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| CNB2006100500578A CN100386683C (en) | 2006-03-29 | 2006-03-29 | Optical module for liquid crystal display and liquid crystal display |
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| CN1821849A CN1821849A (en) | 2006-08-23 |
| CN100386683C true CN100386683C (en) | 2008-05-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100410761C (en) * | 2006-06-12 | 2008-08-13 | 宁波思达利光电科技有限公司 | Optical module for liquid crystal display and liquid crystal display |
| CN101916008B (en) * | 2010-07-20 | 2012-02-15 | 苏州晶智科技有限公司 | Alignment coupling piece for optical module of liquid crystal display and optical module |
| CN107664869B (en) * | 2017-11-10 | 2021-06-15 | 深圳市明彩新世纪科技有限公司 | Energy-saving liquid crystal display |
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