CN100347606C - LCD micromotion exposure and development device - Google Patents
LCD micromotion exposure and development device Download PDFInfo
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- CN100347606C CN100347606C CNB2004100931353A CN200410093135A CN100347606C CN 100347606 C CN100347606 C CN 100347606C CN B2004100931353 A CNB2004100931353 A CN B2004100931353A CN 200410093135 A CN200410093135 A CN 200410093135A CN 100347606 C CN100347606 C CN 100347606C
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Abstract
The present invention relates to an LCD micromotion exposure imaging device which is used for LCD digital imaging systems. One set of light-emitting diodes of red, green and blue are fixed on an LED base plate, an illumination unit is formed from one set of collimation lenses which are fixed on a collimation holder, and the illumination unit forms an illuminating system with a light mixing cylinder and ground glass. The illuminating system, an LCD microchecker, a zooming projecting lens and photographic paper are completely coaxial. The whole LCD micromotion exposure imaging device is accordingly formed, wherein the LCD microchecker is composed of a microchecker bottom plate, an LCD chip, an LCD holder, a microchecker limited block, piezoelectric ceramics, a piezoelectric ceramic limited block and a spring sheet, and the piezoelectric ceramic is used for pushing the LCD holder to make the LCD holder accurately generate micro displacement. The present invention has the advantages of high micro displacement precision, simple control, balance pattern color, good brilliance degree, low heat radiation requirements for the system and long service life of light sources.
Description
Technical field
The invention provides the micromotion exposure and development device of a kind of LCD of being used for (liquid crystal) image technology, be used to improve, the available resolution low lower quality of image that cause low because of the LCD aperture opening ratio.Belong to the digital imaging technical field.
Background technology
Imaging system major part that at present can the outputting high quality image is from companies such as Fuji, Kodak, Nuo Rishi, they have adopted laser scanning exposure or low-light valve exposure method, add corresponding flushing device, cost an arm and a leg, every minimum also will reach 700,000 yuans, causes most of digital color enlargements shop to be difficult to accept.As seen foreign technology mainly has the following disadvantages: imaging system structure and technical sophistication that (1) is external are difficult to realize; (2) cost is higher and plant factor is low, is difficult to allow the consumer receive; (3) more used Primary Components of technology, also relying on fully at present abroad provides, and is difficult to reach industrialization, has seriously restricted the starting and the formation of China's digital imaging industry.
The digital imaging system of present domestic research and development seldom, most LCD technology that adopt, owing to be subjected to the low and low restriction of aperture opening ratio of LCD available resolution, cause when output large-size image, can not satisfying the requirement of people far away to picture quality, promptly image resolution is extremely low; A small amount of digital imaging system adopts LCOS (liquid crystal on silicon) technology, because the yields of LCOS is low, technology is stable inadequately, so can not reach practical application at all.
Imaging system based on LCD adopts Halogen lamp LED or xenon lamp as lighting source mostly at present, and the bright-coloured degree of the image color of output is lower, and colour balance control is difficult.Present in addition LCD available resolution is lower, and domestic imaging technique based on LCD does not have extra technical breakthrough at present, causes washing undersized image, when the image output size is big, all can have dark lattice effect; Digital imaging system based on LCOS can not reach practical application at all.
Summary of the invention
The objective of the invention is at the deficiency of existing digital imaging system and the available present situation of LCD, a kind of micromotion exposure and development device that is used for the digital imaging system is provided, make it simple in structure, cost is low, can make full use of existing available LCD resolution, can realize good degree bright in luster, and require low the heat radiation of system, do not need to use colour esensitized equipment, do not need the sacrificial light energy to realize colour balance.
For realizing such purpose, in the technical scheme of the present invention, adopt one group to be fixed in the red, green, blue Tricolor LED on the LED substrate, one group of collimating mirror composition lighting unit that is fixed on the alignment jig, lighting unit and light mixing cartridge and frosted glass constitute illuminator, and illuminator, LCD micropositioner, Zooming-projection camera lens and printing paper are coaxial fully, constitute whole LCD micromotion exposure and development device.Wherein the LCD micropositioner is made of micropositioner base plate, LCD chip, LCD frame, micropositioner limited block, piezoelectric ceramics, piezoelectric ceramics limited block, piezoelectric ceramics limited block and spring leaf, and piezoelectric ceramics makes it to produce accurate micrometric displacement in order to promote the LCD frame.
Among the present invention, the light mixing cartridge shell is embedded in the outside surface of light mixing cartridge, is used for fixing light mixing cartridge and guarantees the coaxial relation of above each several part.Press close to the LED substrate below alignment jig is set, and the lower surface of alignment jig is a square groove, just is embedded into the light entrance place of light mixing cartridge, has guaranteed the luminous energy free of losses.The lower surface of light mixing cartridge, promptly the exit of light and frosted glass join, and frosted glass is embedded in the beam projecting mouth place of light mixing cartridge with miter angle, and both have guaranteed to shine the light uniformity coefficient on little display panel.Be the LCD micropositioner below the frosted glass, the LCD chip that is used for modulation image that is positioned on the LCD micropositioner is pressed close to the frosted glass setting, and LCD chip and frosted glass can be avoided entering of optical energy loss and other veiling glare apart from very near.Place a Zooming-projection camera lens between LCD micropositioner and the printing paper, its focal length is directly controlled with computer, is used to regulate the exit facet of LCD chip light and paper size is corresponding one by one mutually.
LCD micropositioner of the present invention is made of upper, middle and lower-ranking, and lower floor is the micropositioner base plate, and the middle level is made of middle level base plate, middle level base plate limited block, piezoelectric ceramics, piezoelectric ceramics limited block and spring leaf.Wherein a side of middle level base plate is close to and is fixed in to spring leaf, between middle level base plate and piezoelectric ceramics, orthogonal two other side, middle level base plate side is close to a middle level limited block respectively therewith, the other end of piezoelectric ceramics is close to the piezoelectric ceramics limited block, with the level of assurance piezoelectric ceramics and the invariant position of vertical direction.The upper strata is made of LCD chip, LCD frame, upper strata limited block, spring leaf, piezoelectric ceramics and piezoelectric ceramics limited block, the LCD chip be fixed in the LCD frame above, the spring leaf on upper strata, piezoelectric ceramics and piezoelectric ceramics limited block are identical with spring leaf, piezoelectric ceramics and the piezoelectric ceramics limited block positional structure in middle level, only the spring leaf LCD frame side, upper strata that depended in upper strata is vertical mutually with the side, middle level that the middle level spring leaf is depended on, and two sides of the orthogonal LCD frame in LCD frame side that is depended on the upper strata spring leaf are close to a upper strata limited block respectively.
The light that LED sends is injected light mixing cartridge through the collimation substrate, in the LCD that modulates image, again through Zooming-projection camera lens, projects exposure image on the printing paper through the rayed of frosted glass outgoing.According to the colour balance principle, can calculate red, green, blue three-color light source time shutter ratio, and total exposure time is adjustable.
The micropositioner control flow is as follows: at first picture breakdown is become the red, green, blue tristimulus image, then respectively with its negate.Control system provides the time shutter, calculates the exposure time of three looks automatically, and tri coloured lantern respectively exposes four times.At first allow LCD modulate red negate image, make red LED luminous, fluorescent lifetime is 1/4th of a red colored lamp fluorescent lifetime, extinguishes red colored lamp, micropositioner moves, and the red light continuation is luminous then, and moving exposure is four times altogether, green light, blue lamp exposes successively, exposure principle such as the red colored lamp principle of exposing.Behind the three coloured light end exposures, control system notice paper advance mechanism carries out paper feed and washes phase.
The moving process of micropositioner is such: three-color LED light respectively exposes four times, and after the LED lamp of each color exposure four times, the LCD micropositioner moves to original position at last along foursquare four limits.Every exposure once, the LCD micropositioner moves half of Pixel Dimensions, each moves twice on directions X and the Y direction in the surface level.At first move once, move once along the Y direction again, and then move each once along the reverse of directions X and Y direction respectively, get back to original position at last along directions X in the surface level.
Micromotion exposure and development device of the present invention has significant advantage: adopt LED as lighting source, improve the life-span of system, reduced the heat radiation requirement of system, reached higher degree bright in luster, need not to use colour esensitized equipment, need not loss luminous energy and realize colour balance.The actuation element of micrometric displacement is selected piezoelectric ceramics for use, micrometric displacement precision height (precision is 0.1 micron), and controllability is good, has dwindled the overall volume of micropositioner; Adopt the elastic deformation of spring leaf to realize micrometric displacement in the LCD micropositioner, friction force is very little, guarantee the high stability and the repeatability of system, improved the size and the quality of image output effectively, further satisfied the demand of people's different resolution image.The LCD micropositioner adopts the preload design, has avoided hysterisis error.Adopt fine motion exposure device of the present invention, can make the LCD output large scale of existing available resolution, high-quality image, reduce the complexity and the price of imaging system.The present invention can with traditional film formula enlargement of color photos machine compatibility, expanded the digital photofinishing function of traditional enlargement of color photos machine.
Description of drawings
Fig. 1 is a LCD micromotion exposure and development device structural representation of the present invention.
Among Fig. 1,1 is the LED substrate, and 2 are the collimation substrate, and 3 is the light mixing cartridge shell, and 4 is light mixing cartridge, and 5 is the LCD micropositioner, and 6 is Zooming-projection camera lens, and 7 is printing paper, and 16 is whole illuminator, and 17 is frosted glass.
Fig. 2 is a LCD micropositioner structural representation of the present invention.
Among Fig. 2,8 is the micropositioner base plate, and 9 is the LCD chip, 10 is the LCD frame, 11 is micropositioner upper strata limited block, and 12 is the middle level piezoelectric ceramics, and 13 is middle level piezoelectric ceramics limited block, 14 is micropositioner middle level limited block, 15 is the middle level spring leaf, and 18 is the middle level base plate, and 19 is the upper strata spring leaf, 20 is the upper strata piezoelectric ceramics, and 21 is upper strata piezoelectric ceramics limited block.
Fig. 3 is exposure system control flow among the present invention.
Fig. 4 is micropositioner shifting principle figure among the present invention.
Among Fig. 4, a is the physical size of pixel, and b is the pixel size that effectively exposes, and empty frame table shows actual pixels, and real frame table is shown with imitates the exposure pixel, and dotted arrow is represented 4 moving directions of pixel, each mobile a/2.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
Shown in Figure 1 is the structure composition signal of an embodiment of fine motion exposure device of the present invention.It in the dotted line scope among the figure multi-light source LED illuminator 16 of the present invention, constitute by the LED substrate 1, alignment jig 2, light mixing cartridge 4, the frosted glass 17 that are successively set on the same optical axis, fix one group of red, green, blue Tricolor LED on the LED substrate 1, fix one group of collimating mirror on the alignment jig 2, light mixing cartridge shell 3 is embedded in the outside surface of light mixing cartridge 4, is used for fixing light mixing cartridge 3 and guarantees the coaxial relation of above each several part.Press close to LED substrate 1 below alignment jig 2 is set, and the lower surface of alignment jig 2 is a square groove, just is embedded into the light entrance place of light mixing cartridge 4, has guaranteed the luminous energy free of losses; The lower surface of light mixing cartridge 4, promptly the exit of light and frosted glass 17 join, and frosted glass 17 is embedded in the beam projecting mouth place of light mixing cartridge 4 with miter angle, and both have guaranteed to shine the light uniformity coefficient on the LCD chip 9.Below the frosted glass 17 is LCD micropositioner 5, and the LCD chip 9 that is used for modulation image that is positioned on the LCD micropositioner 5 is pressed close to the frosted glass setting, and the distance between LCD chip 9 and the frosted glass 17 is very near, in order to avoid the entering of optical energy loss and other veiling glare.Place a Zooming-projection camera lens 6 between LCD micropositioner 5 and the printing paper 7, its focal length is directly controlled with computer, and the exit facet that is used to regulate LCD chip 9 light is corresponding one by one with printing paper 7 sizes.
The structure of LCD micropositioner 5 of the present invention is made of micropositioner base plate 8, LCD chip 9, LCD frame 10, micropositioner upper strata limited block 11, middle level piezoelectric ceramics 12, middle level piezoelectric ceramics limited block 13, micropositioner middle level limited block 14, middle level spring leaf 15, middle level base plate 18, upper strata spring leaf 19, upper strata piezoelectric ceramics 20, upper strata piezoelectric ceramics limited block 21 as shown in Figure 2.Its at the middle and upper levels piezoelectric ceramics 20 make it to produce accurate micrometric displacement in order to promote LCD frame 10.
The light that LED on the LED substrate 1 sends enters light mixing cartridge 4 behind collimation substrate 2, shine on the modulated LCD chip 9 that makes image through frosted glass 17, exposes on printing paper 7 through projecting zoom lens 6.It is pointed out that picture breakdown have been become the red, green, blue tristimulus image in advance, and respectively with the tristimulus image negate.During the red negate image of LCD chip 9 modulation, with corresponding ruddiness exposure.In like manner, when LCD chip 9 green negate images of modulation and blue negate image, with the light exposure of its corresponding same color.
The present invention intends adopting by the synthetic standard white light source D65 of red, green, blue three coloured light.Can find the chromaticity coordinates of standard white light source D65 according to chromaticity diagram, and then can obtain the tristimulus values (promptly constituting the energy of the three primary colours light of this light source) of this light source, provide by (2).The gross energy that printing paper receives is provided by (1) formula.Promptly can obtain the energy ratio of three primary light source,, and then can obtain the time shutter ratio of three coloured light because the luminous power of employed red, green, blue tri coloured lantern is known.
E
T＝E
R+E
G+E
B＝I
R×S×T
R+I
G×S×T
G+I
B×S×T
B (1)
(2)
(1) S is an irradiated area in the formula, i.e. printing paper 7 areas; I
R, I
G, I
BBe respectively the illumination of red, green, blue three coloured light on 7 in printing paper; T
R, T
G, T
BBe respectively the time shutter of red, green, blue three coloured light on 7 in printing paper; E
TThe gross energy that is received for printing paper 7; E
R, E
G, E
BBe respectively the gross energy of red, green, blue three coloured light that printing paper 7 received.(2) x in the formula
10, y
10, z
10Be the chromaticity coordinates of standard white light source D65, X
10, Y
10, Z
10Tristimulus values for red, green, blue three coloured light of synthetic standards white light source D65.
Fine motion of the present invention exposes control principle as shown in Figure 3: behind the power initiation, at first set the time shutter by PC, automatically calculate the time shutter of three coloured light according to above-mentioned principle, (picture breakdown that will expose in advance becomes the RGB tristimulus image to allow LCD chip 9 modulate red negate image then, negate respectively then), lights the LED lamp of same color, expose, time shutter is 1/4th of this coloured light time shutter, stops exposure; Drive LCD micropositioner 5, make it move half of Pixel Dimensions along a direction in the surface level, the LED lamp of same color continues exposure (time shutter is identical with last time) again, in like manner continues to expose twice again, exposes altogether four times.The mobile alignment of LCD micropositioner 5 as shown in Figure 4, among Fig. 4, a is the physical size of pixel, b is effective exposure pixel size (relevant with the aperture opening ratio of LCD, aperture opening ratio is big more, and b is big more); Empty frame table shows actual pixels, and real frame table is shown with imitates the exposure pixel; Dotted arrow is represented 4 moving directions of pixel, each mobile a/2.The exposure process of green LED lamp and blue led lamp is identical with the exposure process of red LED lamp.Three coloured light respectively expose four times, every exposure once, LCD micropositioner 5 moves half of Pixel Dimensions, each moves twice on directions X and the Y direction in the surface level, as Fig. 4, the LCD micropositioner at first moves once along directions X in the surface level, moves once along the Y direction again, and then move each once along the reverse of directions X and Y direction respectively, get back to original position at last.
Claims (3)
1, a kind of LCD micromotion exposure and development device, it is characterized in that by the LED substrate (1) that is successively set on the same optical axis, alignment jig (2), light mixing cartridge (4), frosted glass (17) constitutes illuminator (16), fix on the LED substrate (1) one group red, green, blue Tricolor LED, fix one group of collimating mirror on the alignment jig (2), light mixing cartridge shell (3) is embedded in the outside surface of light mixing cartridge (4), be used for fixing light mixing cartridge (3) and guarantee the coaxial relation of above each several part, press close to LED substrate (1) below alignment jig (2) is set, the lower surface of alignment jig (2) is a square groove, just be embedded into the light entrance place of light mixing cartridge (4), frosted glass (17) is embedded in the beam projecting mouth place of light mixing cartridge (4) with miter angle, be provided with the LCD micropositioner (5) of the LCD chip (9) of modulation image below the frosted glass (17), place Zooming-projection camera lens (6) between LCD micropositioner (5) and the printing paper (7), its focal length is directly controlled with computer, and the exit facet that is used to regulate LCD chip (9) light is corresponding one by one with printing paper (7) size.
2, according to the LCD micromotion exposure and development device of claim 1, it is characterized in that described LCD micropositioner (5) is made of upper, middle and lower-ranking, lower floor is micropositioner base plate (8), middle level spring leaf (15) be close to and be fixed in a side of middle level base plate (18) and be positioned at middle level base plate (18) and middle level piezoelectric ceramics (12) between, the other end of middle level piezoelectric ceramics (12) is close to middle level piezoelectric ceramics limited block (13), with the level of assurance middle level piezoelectric ceramics (12) and the invariant position of vertical direction; A middle level limited block (14) is close at two the side two ends adjacent with middle level spring leaf (15) middle level, place base plate (18) side respectively, in the upper strata, LCD chip (9) be fixed in LCD frame (10) above, upper strata spring leaf (19), upper strata piezoelectric ceramics (20) and upper strata piezoelectric ceramics limited block (21) respectively with middle level spring leaf (15), middle level piezoelectric ceramics (12), the positional structure of middle level piezoelectric ceramics limited block (13) is identical, but upper strata LCD frame (10) side that upper strata spring leaf (19) is depended on is vertical mutually with the side that middle level spring leaf (15) is depended on, and a upper strata limited block (11) is close at the two ends, two sides of the orthogonal LCD frame in LCD frame (10) side that is depended on upper strata spring leaf (15) respectively.
3,, it is characterized in that described LCD micropositioner (5) adopts the preload design to avoid hysterisis error according to the LCD micromotion exposure and development device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100931353A CN100347606C (en) | 2004-12-16 | 2004-12-16 | LCD micromotion exposure and development device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100931353A CN100347606C (en) | 2004-12-16 | 2004-12-16 | LCD micromotion exposure and development device |
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| Publication Number | Publication Date |
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| CN1632694A CN1632694A (en) | 2005-06-29 |
| CN100347606C true CN100347606C (en) | 2007-11-07 |
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| CNB2004100931353A Expired - Fee Related CN100347606C (en) | 2004-12-16 | 2004-12-16 | LCD micromotion exposure and development device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826480Y (en) * | 2005-07-01 | 2006-10-11 | 上海多丽影像设备有限公司 | Large LCD digital exposure apparatus |
| CN2849773Y (en) * | 2005-10-17 | 2006-12-20 | 上海多丽影像设备有限公司 | Movable large LCD digital exposure device |
| CN2857056Y (en) * | 2005-12-05 | 2007-01-10 | 上海多丽影像设备有限公司 | Large LCD micro shifted digital code exposure machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000138796A (en) * | 1998-11-04 | 2000-05-16 | Canon Inc | Document illuminating device |
| CN2629067Y (en) * | 2003-05-30 | 2004-07-28 | 贡晔 | Photo enlarging & printing apparatus based on planar array colour LED ligh source |
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2004
- 2004-12-16 CN CNB2004100931353A patent/CN100347606C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000138796A (en) * | 1998-11-04 | 2000-05-16 | Canon Inc | Document illuminating device |
| CN2629067Y (en) * | 2003-05-30 | 2004-07-28 | 贡晔 | Photo enlarging & printing apparatus based on planar array colour LED ligh source |
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| CN1632694A (en) | 2005-06-29 |
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