CN102045525B - Light compensation mechanism, light machine device, display system and light compensation method thereof - Google Patents
Light compensation mechanism, light machine device, display system and light compensation method thereof Download PDFInfo
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- CN102045525B CN102045525B CN 200910208411 CN200910208411A CN102045525B CN 102045525 B CN102045525 B CN 102045525B CN 200910208411 CN200910208411 CN 200910208411 CN 200910208411 A CN200910208411 A CN 200910208411A CN 102045525 B CN102045525 B CN 102045525B
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Abstract
The invention provides a light compensation mechanism, a light machine device, a display system and a light compensation method thereof. The light compensation mechanism is provided with at least one sensor and a controller, wherein the sensor can be used for sensing the numerical value of relevant luminous flux of each ray of different color systems; and the controller can selectively adjust the luminous strength of at least one of a plurality of point light sources and/or correspondingly adjust the transmittance of at least one part of liquid crystal of a liquid crystal panel at any time.
Description
[technical field]
The invention relates to the method for a kind of smooth compensation mechanism, optical mechanical apparatus, display system and light thereof compensation, be meant a kind of optical mechanical apparatus that can the equal luminosity of dynamic compensation especially.
[background technology]
The at present more existing display systems such as the projection display (Projector) or projection display or high definition TV (HDTV) system adopt a kind of liquid crystal on silicon (Liquid Crystal on Silicon, LCoS) technology, be suitable for constituting slim size and show large-scale high resolution pictures, can obtain contrast and the brightness higher simultaneously than conventional liquid crystal (LCD).The primary structure of this kind liquid crystal on silicon display system comprises: an illumination module (Illumination Module), polarizing beam splitter (Polarizing Beam Splitter, PBS), silica-based liquid crystal panel (LCoS Panel) with active matrix, at least one component mating plate, a plurality of prisms (Prism), projection lens (Projection Lens) and screen etc., comprising this illumination module, this polarizing beam splitter, this silica-based liquid crystal panel, this at least one component mating plate, a plurality of prisms, the light path of this projection lens and each inter-module correspondence can be formed an optical mechanical apparatus or claim photo engine, assembles or transports with the assembly that makes things convenient for this display system.The illumination module of these existing LCoS display systems has light source such as the arc lamp (Arc Lamp) that is used to produce single colour system (as white light) mostly, need to see through earlier the light that this at least one component mating plate such as filter (filter) shone this monochromatic system light source and be dispersed into a plurality of different colour systems (as ruddiness (R), green glow (G) and blue light (B)) light, indivedual again prism group and this polarizing beam splitters that see through correspondence are sent to this silica-based liquid crystal panel, therefore light loss is higher, easily cause whole luminosity to weaken, and use a plurality of set of lenses to handle different colour system light, keep simultaneously each colour system light again on accurate light path, make light path design become very complicated, cost is too high.After the polarization of these a plurality of different these polarizing beam splitters of colour system light process is incident to this silica-based liquid crystal panel with the polarised light that produces correspondence respectively, the pixel electrode of the active-matrix of this silica-based liquid crystal panel turns to these polarised lights of modulation according to the voltage control liquid crystal that applies, and these a plurality of different colour system light are separated to form the reverberation of full-color image.The image reverberation that these a plurality of different colour systems are formed utilizes the reflection of this silica-based liquid crystal panel, sees through this polarizing beam splitter and projection lens projects to screen, forms the cognizable picture of a human vision at last.The halo that the monochromatic system light source of other existing LCoS display system is used motor driven instead at some comes beam split to replace light splitting piece, and must collocation use a plurality of corresponding mirror groups, so that light path design is more complicated, need take bigger ray machine space, and light loss and assembly cost are also high.In the existing LCoS display system of another kind, even need use three groups of silica-based liquid crystal panels and handle a plurality of different colour systems (as ruddiness (R), green glow (G) and blue light (B)) light respectively, and need to increase corresponding total reflection and penetrate the prism group entirely, more complicated respective optical path is established in each colour system light collocation, so its cost is more expensive.
In addition, single colour system light source sees through same mirror group when luminous, different or this monochromatic system light source is sent to the quality difference of different or each light source of the light path of different colour system light between the silica-based liquid crystal panel because of the emission angle of light, easily makes this silica-based liquid crystal panel the luminous intensity inhomogeneous (as the centre on this silica-based liquid crystal panel surface and the luminosity drop of outer peripheral areas) of different colour system light occur.As shown in Figure 1, this single colour system light source sees through same mirror group and exposes to shading value (L) on this silica-based liquid crystal panel compared to a standard value (K) that meets the product yield, the problem of luminosity inequality occurs.
The illumination module of the at present existing large-sized display system of many tradition selects for use the light-emitting diode (LED) of several different colour systems (as red (R), green (G) and blue (B)) as point-source of light, but it is a shortcoming is luminous efficiency and equal photosensitiveness, compared with the more difficult control of line source of traditional cold cathode tube (CCFL).In order to reach best all luminosity, must carry out selecting on the characteristic to the LED that produces, but this one to select cost also quite high.If the luminous luminosity inequality of light-emitting diode (LED) that should the difference colour system, may produce the result shown in Fig. 2 a, promptly the luminosity of red (R) light source is higher than this standard value that meets the product yield (K), and other luminosity as green (G) and blue (B) light source all is lower than this standard value, produces a deviate.In addition, because different colour system configured light sources position is different or deviation is arranged (as wherein a colour system light source position is square on the upper side, another colour system light source position is the side on the lower side), make this difference colour system light source different through the irradiating angle of mirror group, pass through the light loss that penetrates and/or reflect of corresponding mirror group on each light path again, the luminous intensity (being shading value) that causes injecting the different colour system light on this silica-based liquid crystal panel also produces uneven problem, and its result is shown in Fig. 2 b.
[summary of the invention]
For solving aforementioned prior art problems, a main purpose of the present invention is to provide the method for a kind of smooth compensation mechanism, optical mechanical apparatus, display system and light compensation thereof, need not the light that light splitting piece, filter or branch halo come the light of single colour system light source is dispersed into variant colour system to be set, therefore can reduce the ray machine space and reduce manufacturing cost as prior art.
Another object of the present invention is to provide the method for a kind of smooth compensation mechanism, optical mechanical apparatus, display system and light compensation thereof, need not to design and dispose accurate respective optical path and set of lenses one by one at the light of variant colour system as prior art, utilize light compensation mechanism of the present invention can go the dynamic photometric calibration of each light source at any time, therefore can significantly reduce the ray machine space and reduce manufacturing cost and proofread and correct cost.
Another object of the present invention is to provide the method for a kind of smooth compensation mechanism, optical mechanical apparatus, display system and light compensation thereof, can shorten the light path of each light source, reduce optical loss.
Another object of the present invention is to provide the method for a kind of smooth compensation mechanism, optical mechanical apparatus, display system and light compensation thereof, can improve the equal luminosity of each light source.
For reaching the foregoing invention purpose, of the present invention one provides a kind of display system than embodiment, and it mainly comprises: an optical mechanical apparatus and a screen.This optical mechanical apparatus further comprises: some spots light source, lens, a polarizing beam splitter, a liquid crystal panel, a projecting mirror and a smooth compensation mechanism, wherein the point-source of light of this several different colour systems produces the irradiation light of several different colour systems respectively according to different sequential.These lens are used to control the optical path direction of the irradiation light of this several different colour systems.This polarizing beam splitter directly receives the irradiation light by this several different colour systems of this lens control, to produce several corresponding polarized incident lights respectively.This liquid crystal panel, have several liquid crystal and be used to receive the polarized incident light of this several different colour systems, and according to the corresponding reverberation that produces several different colour systems of the light transmittance of this liquid crystal, wherein the reverberation of this several different colour systems penetrates the polarized reflection light of several different colour systems via this polarizing beam splitter.The projection light that this projecting mirror is used to receive the polarized reflection light of this several different colour systems and projection comprises several different colour systems outside this optical mechanical apparatus.This light compensation mechanism has irradiation light, polarized incident light, reverberation, polarized reflection light and projection light that at least one transducer is used for each different colour system correspondence of the sensing numerical value of one of them relevant luminous flux at least, and the numerical value of the relevant luminous flux that transmits according to this at least one transducer of controller, selectivity is adjusted this some spots light source luminous intensity of one of them and/or the light transmittance of corresponding adjustment at least a portion liquid crystal at least.The numerical value of aforementioned relevant luminous flux can be for luminous flux, luminosity, illumination and briliancy wherein a kind of.
Aforementioned this controller further has a core logic and is used for according to aforementioned about the numerical value of luminous flux and the difference between the predetermined standard value, determines the number of the luminous intensity of this at least one point-source of light of adjustment.In addition, this core logic also can be according to the difference value of several transducers between several relevant numerical value of luminous flux of sensing under the different sensing regions or under the different sequential, via the Query Result of a question blank and/or the operation result of an arithmetic element, determine a magnitude of voltage or a current value or a sequential luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal to adjust this at least one point-source of light.
In another preferred embodiment, the position of this at least one transducer is close to the outside of this liquid crystal panel and receives this polarized incident light.In another preferred embodiment, the position of this at least one transducer is close to the outside of this polarizing beam splitter and receives this irradiation light.In another preferred embodiment, the position of this at least one transducer is close to this projecting mirror and receives this polarized reflection light.In another preferred embodiment, this at least one transducer is positioned at outside this optical mechanical apparatus and receives this projection light.In another preferred embodiment, this optical mechanical apparatus only comprises: some spots light source, lens, a polarizing beam splitter, a liquid crystal panel, a projecting mirror and a controller, wherein this controller can electrically be connected to proofread and correct the equal luminosity of each point-source of light with a transducer.In another preferred embodiment, this at least one transducer such as digital camera capture the image frame of being made up of different colour system light on this screen.
In addition, the invention provides a kind of method of light compensation, be applicable to a display system, this method comprises the following steps:
The numerical value such as the luminosity of the relevant luminous flux of the different colour system light that one of them light path transmitted of each several sections light path of this display system of sensing under different sequential;
Judge sense each about the numerical value of luminous flux and the difference value between the predetermined standard value;
Numerical value and/or this difference value according to the relevant luminous flux that senses, via the Query Result of a question blank and/or the operation result of an arithmetic element, determine a magnitude of voltage or a current value or a sequential adjusting the luminosity of this point-source of light, up to the luminosity of these point-source of lights at last all more than or equal to this predetermined standard value;
The numerical value such as the luminosity of the relevant luminous flux of the different colour system light that one of them light path of the aforementioned several sections light paths of sensing transmits on the diverse location under the same and/or different sequential.
Whether judgement is identical between several the relevant numerical value (as luminosity) of luminous flux to the different colour system light of sensing in each sensing region under different sequential;
Several numerical value and/or this difference value according to the different colour system light that sense about luminous fluxes, via the Query Result of this question blank and/or the operation result of this arithmetic element, determine a magnitude of voltage or a current value or a sequential, reach wherein lower luminosity (but still meeting this predetermined standard value) with higher luminosity among adjusting these several point-source of lights earlier;
Whether judge between several relevant numerical value (as luminosity) of luminous flux of the same colour system light that under the same sequential different sensing regions sensed identical (or evenly); And
Numerical value (as luminosity) and/or this difference value according to several relevant luminous fluxes of the same colour system light of sensing, via the Query Result of this question blank and/or the operation result of this arithmetic element, determine a magnitude of voltage or a current value or a sequential liquid crystal light transmittance, reach lower luminosity in this difference sensing region with the control liquid crystal panel.No matter final is that numerical value of several relevant luminous fluxes of same or different colour system light all can reach unanimity, and promptly finishes the equal photometric calibration of each point-source of light.
Compared with prior art, utilize smooth compensation mechanism of the present invention, need not light splitting piece, filter will be set or divide halo to come the light of single colour system light source is dispersed into the light of variant colour system as prior art, also need not to design and dispose accurate respective optical path and set of lenses one by one at the light of variant colour system, can improve the equal luminosity of each light source, therefore can reduce whole ray machine space and reduce manufacturing cost and the correction cost, simultaneously shorten the light path of each light source, so can reduce optical loss than prior art.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
[description of drawings]
Fig. 1 shows that light that a kind of existing display system uses single colour system light source is through luminosity after the mirror group and the measurement coordinate diagram of time.
Fig. 2 a shows that another kind of existing display system uses the luminosity of light of a plurality of different colour system light sources and the measurement coordinate diagram of time.
Fig. 2 b shows that another kind has display system now and uses the light of a plurality of different colour system light sources through luminosity after the mirror group and the measurement coordinate diagram of time.
Fig. 3 a shows the simplified schematic diagram of the display system of a kind of foundation one first preferred embodiment of the present invention.
Fig. 3 b shows the simplified schematic diagram of the display system of a kind of foundation one second preferred embodiment of the present invention.
Fig. 3 c shows the simplified schematic diagram of the display system of a kind of foundation one the 3rd preferred embodiment of the present invention.
Fig. 3 d shows the simplified schematic diagram of the display system of a kind of foundation one the 4th preferred embodiment of the present invention.
Fig. 3 e shows the simplified schematic diagram of the display system of a kind of foundation one the 5th preferred embodiment of the present invention.
Fig. 4 shows a kind of flow chart of steps of the method according to light of the present invention compensation.
[embodiment]
Hereinafter with reference to appended graphic detailed description technology contents of the present invention.
Please refer to Fig. 3 a, the display system 3a that shows first preferred embodiment of the present invention of a kind of foundation, can be applicable to as fields such as the projection display (Projector) or projection display or high definition TV (HDTV) systems, its primary structure comprises: an optical mechanical apparatus (or claiming photo engine) 30a and a plane formula screen 32a, wherein this optical mechanical apparatus 30a further comprises: some spots light source 302a, 304a and 306a, lens (Prism) 310a, one polarizing beam splitter (Polarizing beam splitter, PBS) 312a, one liquid crystal panel 314a, one projecting mirror (Projection Lens) 316a and a smooth compensation mechanism 318a.The start principle of relevant these assemblies is treated the back detailed description.
Among first embodiment shown in Fig. 3 a, this some spots light source 302a, 304a and 306a are that one group of different colour system is (as ruddiness (R), green glow (G) and blue light (B)) light-emitting diode (LED) and be packaged together and become an illumination module (Illumination Module) 308a, the residing position of the light-emitting diode of these different colour systems (LED) difference wherein, be partial to the top of this illumination module 308a as the position of red light-emitting diode 302a, the centre of this illumination module 308a is partial in the position of green light LED 304a, and the below of this illumination module 308a is partial in the position of blue light-emitting diode 306a.This some spots light source 302a, 304a and 306a promptly utilize persistence of vision principle to launch the irradiation light 3102a of different colour systems respectively under different sequential according to a kind of look preface method (Color-sequential technology), 3104a and 3106a and then finish a full-color picture are so need not to use traditional colored filter.
These lens 310a is a kind of concavees lens, be used to control the irradiation light 3102a of this difference colour system, the optical path direction of 3104a and 3106a is parallel to each other and this polarizing beam splitter of direct irradiation 312a, so that each irradiation light 3102a, it is comparatively average that 3104a and 3106a are incident to the luminosity of this polarizing beam splitter 312a, the irradiation light 3102a of these different colour systems wherein, the light path of 3104a and 3106a is all non-spectral light path, that is need not to use light splitting piece, filter or branch halo, therefore than prior art, can significantly reduce the use of reflector group and the foundation of source path, and the size of optical mechanical apparatus 30a is dwindled, reduce manufacturing cost.
This polarizing beam splitter 312a, have one first polarization portion (S) directly in the face of and to irradiation light 3102a by this several different colour systems of these lens 310A control optical path direction, 3104a and 3106a carry out polarization, to produce several corresponding polarized incident light 3122a respectively, 3124a and 3126a inject among this liquid crystal panel 314a, and this polarizing beam splitter 312a also has one second polarization portion (P).
This liquid crystal panel 314a is a kind of silica-based liquid crystal panel (LCoS Panel), mainly has several liquid crystal and several pixel cells (as pixel electrode) that is arranged and is used for controlling this liquid crystal according to applied voltage and turns to change the light transmittance of liquid crystal.These several liquid crystal are used for receiving the polarized incident light 3122a of this several the different colour systems that transmitted by the first polarization portion (S), 3124a and 3126a, and utilize the reflection of this liquid crystal panel 314a and utilize corresponding generation of light transmittance of this liquid crystal to comprise several different colour systems at interior image reverberation.Then, the image reverberation of these several different colour systems penetrates polarized reflection light 3142a, 3144a and the 3146a of several different colour systems via the second polarization portion (P) of this polarizing beam splitter 312a.
This projecting mirror 316a, receive the polarized reflection light 3142a of this several different colour systems, 3144a and 3146a and the screen 32a outside this optical mechanical apparatus 30a throw several different colour system image projection light 3162a, 3164a and 3166a are to form a full-color image frame 322a on the surface of screen 32a.
As aforementioned, each point-source of light 302a, the luminous position of 304a and 306a and angle be deviation or each point-source of light 302a of script to some extent, the characteristics of luminescence of 304a and 306a finished product is just different, the feedback that utilizes light compensation mechanism 318a of the present invention dynamically to carry out the each point light source luminosity is proofreaied and correct, can avoid the point-source of light 302a of this difference colour system, luminosity (or claiming luminous intensity) problem pockety takes place in 304a and 306a.In this first embodiment, this light compensation mechanism 318a has at least one transducer 3182a, it is provided with the outside (avoiding blocking liquid crystal) around contiguous this liquid crystal panel 314a in position with sensing one of them different colour system polarized incident light 3122a at least, the numerical value of the relevant luminous flux of 3124a and 3126a; And the numerical value of the relevant luminous flux that transmits according to this at least one transducer 3182a of controller 3186a, selectivity is adjusted this some spots light source 302a, and 304a and 306a be one of them luminous intensity and/or the corresponding light transmittance of adjusting at least a portion liquid crystal (treat back describe in detail) at least.
This transducer 3182a can be a kind of electric coupling assembly (Charge Coupled Device, CCD) or CMOS (Complementary Metal Oxide Semiconductor) image sensor (CMOS Image Sensor, and the numerical value unit of its relevant luminous flux that senses can select the wherein a kind of of luminous flux, luminosity, illumination and briliancy for use and transmit with the pattern of numeral or analog signal and to give this controller 3186a CIS) or image capture unit such as camera.In addition relevant luminous flux, luminosity, illumination and briliancy are defined as follows: (1) luminous flux (ψ): the light quantity that light source sent in the unit interval is referred to as the luminous flux of this light source, and the unit of luminous flux is lumen (Lumen).(2) luminosity or luminous intensity (I): when a unit solid angle (W) of specific direction was launched the luminous flux of a lumen, then the luminosity of this point-source of light was 1 candle light by point-source of light, and its unit is candle light (cd or cp).(3) illumination (E): the luminous flux number that per unit light-receiving area (S) is received, its unit are lux (Lux), and the light beam that receives 1 lumen as 1 square centimeter of sensitive surface is called 1 lux.(4) briliancy or claim brightness (L): by the shading value of any point on light source or the reflective surface on the unit are of observed direction emission or reflection, its unit is (cd/m2).
In other application case, two transducers such as 3182a can be set, 3184a or two with upper sensor respectively the position on the diverse location in the outside around this liquid crystal panel 314a, as arranging along the diagonal of this liquid crystal panel 314a or its four limits arrangement or each limit arrangement more than one sensor, utilization increases more sensing region on same liquid crystal panel 314a space, can improve each point-source of light 302a, the accuracy of the photometric calibration of 304a and 306a.
This controller 3186a can be a kind of ASIC and integrates control chip and electrically connect aforementioned this several point-source of light 302a, 304a and 306a and this liquid crystal panel 314a respectively.This controller 3186a further has a core logic (can hardware or software realize), the polarized incident light 3122a of each the different colour system that can judge this transducer 3182a sensing at first and feedback, whether the numerical value of the relevant luminous flux of 3124a and 3126a is more than or equal to a predetermined standard value numerical value of the relevant luminous flux of product yield or application standard (as meet), and obtain between the two difference value, to determine adjusting this several point-source of light 302a, 304a and 306a be the number of the luminous intensity of one of them at least.For example the predetermined standard value on same sensing region is 1, and this transducer 3182a senses the luminosity of green glow point-source of light 304a is 1.4, but the luminosity of blue light point light sources 306a be 0.8 and the luminosity of red spot light source 302a be 0.9 to be 1 all less than the predetermined standard value on same sensing region, then this core logic is according to this blue light point light sources 306a, the luminosity difference of red spot light source 302a and predetermined standard value, through the Query Result of a question blank (Look-up table) and/or the operation result of an arithmetic element, determine the luminous intensity that a magnitude of voltage or a current value or a sequential increase this blue light point light sources 306a and red spot light source 302a respectively; By that analogy, till luminous intensity that this core logic is judged this blue light point light sources 306a that this transducer 3182a senses and red spot light source 302a is more than or equal to this predetermined standard value.
Application at different sensing regions on same liquid crystal panel 314a, the core logic of this controller 3186a can also be judged several transducer such as 3182a on the diverse location of liquid crystal panel 314a, difference value between several relevant numerical value of luminous flux that 3184a transmits, determine to adjust this several point-source of light 302a, 304a and 306a be one of them luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least, up to this several sensor in different positions 3182a, numerical value of several relevant luminous fluxes that 3184a transmits reach unanimity, with the luminosity of the different sensing regions of the same liquid crystal panel 314a of homogenizing.For example, in same sequential, the luminosity that this transducer 3182a senses the upper half area of same liquid crystal panel 314a is 1.8, but it is 1 that another transducer 3184a senses the luminosity of the half area of same liquid crystal panel 314a, that is the photometric distribution of two sensing regions of the liquid crystal panel 314a of this moment is inhomogeneous, and there is a deviate 0.8 in the luminosity between this two sensing region.This core logic can be according to this deviate, via the Query Result of this question blank and/or the operation result of arithmetic element, adjust the light transmittance of at least a portion liquid crystal of this liquid crystal panel 314a respectively to determine a magnitude of voltage or a current value or a sequential, it similarly is the light transmittance of liquid crystal of the upper half area of downward modulation liquid crystal panel 314a, reduce penetrating of light, make its deepening; By that analogy, till the luminosity that this core logic is judged the upper half area that this transducer 3182a senses was adjusted into for 1 (but still meeting predetermined standard value) gradually downwards and has reached unanimity with the luminosity of the half area of liquid crystal panel 314a, make this liquid crystal panel 314a obtain higher equal luminosity the most at last.
This controller 3186a is except handling the uneven problem of luminosity of different sensing regions in same sequential (or same colour system), can also Synchronous Processing sense several different colour system point-source of light 302a, the uneven problem of the luminosity of 304a and 306a (that is numerical value of relevant luminous flux) at following same transducer 3182a of different sequential (or different colour system) or 3184a (or referring to same sensing region).For example, in one first sequential, the ruddiness luminosity that this transducer 3182a senses the upper half area of liquid crystal panel 314a is 1.4, is 1 but another transducer 3184a senses the ruddiness luminosity of the half area of same liquid crystal panel 314a; But in one second sequential, this two sensors 3182a and 3184a sense the upper half area of liquid crystal panel 314a and the green glow luminosity of half area is all 1.9.This moment is inhomogeneous except the photometric distribution of two sensing regions of liquid crystal panel 314a, this on two the luminosity between the half area exist outside one first deviant 0.4, and, also there is one second deviant 0.9 between this green glow luminosity and the ruddiness luminosity to same Lower Half sensing region.The core logic of this controller 3186a can be according to aforementioned first and second deviant, via the Query Result of this question blank and/or the operation result of arithmetic element, determine a magnitude of voltage or a current value or a sequential, be used for continue adjusting wherein the point-source of light of higher luminosity such as the luminosity of green glow point-source of light, till 1, and reach unanimity with the luminosity of the red spot light source of the point-source of light of low luminosity wherein such as half area; Determine another magnitude of voltage or current value or sequential in addition synchronously, be used to reduce the ruddiness light transmittance of liquid crystal of the upper half area of liquid crystal panel 314a, make its deepening, until the ruddiness luminosity of this upper half area also is adjusted into 1 and till reaching unanimity with the ruddiness luminosity of the half area of liquid crystal panel 314a gradually.
Utilization is according to the dynamic adjustment of the light compensation mechanism of the first embodiment of the present invention, can under same and different sequential, keep several different colour system point-source of light 302a at any time, 304a and 306a are to the uniformity of photometric distribution among the display system 3a, therefore need not before optical mechanical apparatus dispatches from the factory to save testing cost through fine adjustment.
Please refer to Fig. 3 b, the display system 3b that shows second preferred embodiment of the present invention of a kind of foundation, the main difference point of the display system 3a of itself and aforementioned first preferred embodiment is: the transducer 3182b of second preferred embodiment, the transducer 3182a of the 3184b and first preferred embodiment, the allocation position difference of 3184a.This is because the transducer 3182b of second preferred embodiment, the irradiation light 3102b of different colour systems between the first polarization end (S) that 3184b is located at polarizing beam splitter 312b and the lens 310b, on the optical path direction of 3104b and 3106b, and the outside of contiguous this polarizing beam splitter 312b in its position, be used for according to the different sequential irradiation light 3102b that sensings should the difference colour system respectively, the numerical value of the relevant luminous flux of 3104b and 3106b is also passed the numerical value of this relevant luminous flux back this controller 3186b processing., repeat no more because all identical as for other assembly in this with first embodiment.
Please refer to Fig. 3 c, the display system 3c that shows the 3rd preferred embodiment of the present invention of a kind of foundation, the main difference point of the display system 3a of itself and aforementioned first preferred embodiment is: the transducer 3182c of the 3rd preferred embodiment, the transducer 3182a of the 3184c and first preferred embodiment, the allocation position difference of 3184a, the transducer 3182c of the 3rd preferred embodiment wherein, the polarized reflection light 3142c of different colour systems between the second polarization end (P) that 3184c is located at polarizing beam splitter 312c and the projecting mirror 316c, on the optical path direction of 3144c and 3146c, and the outside of contiguous this projecting mirror 316c in its position, be used for according to the different sequential polarized reflection light 3142c that sensings should the difference colour system respectively, the numerical value of the relevant luminous flux of 3144c and 3146c is also passed the numerical value of this relevant luminous flux back this controller 3186b processing., repeat no more because all identical as for other assembly in this with first embodiment.In other application case, the transducer 3182c of the 3rd preferred embodiment, 3184c also can change on the optical path direction of the reverberation (indicating) of different colour systems between the first polarization end (S) of being located at polarizing beam splitter 312c and the liquid crystal panel 314c, as the outside of contiguous this polarizing beam splitter 312c, be used for numerical value according to the different sequential catoptrical relevant luminous flux that sensings should the difference colour system respectively
Please refer to Fig. 3 d, the display system 3d that shows the 4th preferred embodiment of the present invention of a kind of foundation, the main difference point of the display system 3a of itself and aforementioned first preferred embodiment is: the transducer 3182d of the 4th preferred embodiment, 3184d is located at the image projection light 3162d that comprises different colour systems between this projecting mirror 316d and the screen 32d, on the optical path direction of 3164d and 3166d, as contiguous this screen 32d, be used for according to the different sequential projection light 3162d that sensings should the difference colour system respectively, the numerical value of the relevant luminous flux of 3164d and 3166d is also passed the numerical value of this relevant luminous flux back this controller 3186d processing., repeat no more because all identical as for other assembly in this with first embodiment.But in other application case, the finished product of the optical mechanical apparatus 30d of the 4th preferred embodiment only comprises some spots light source 302d, 304d and 306d, lens 310d, one polarizing beam splitter 312d, one liquid crystal panel 314d, an one projecting mirror 316d and a controller 3186d, but do not comprise transducer 3182d, 3184d (basic module of also non-this display system of genus 3d), because this transducer 3182d, 3184d can be the existing measurement assembly that manufacturing works use, only before this optical mechanical apparatus 30d dispatches from the factory, do to electrically connect with its controller 3186d to carry out each point-source of light 302d, equal photometric measurement and the correction of 304d and 306d.In case proofread and correct and to finish, when this optical mechanical apparatus 30d dispatches from the factory, promptly removable should existing transducer 3182d, 3184d, but the consumer need not time-consuming this optical mechanical apparatus 30d to be done equal photometric calibration again.
Please refer to Fig. 3 e, the display system 3e that shows the 5th preferred embodiment of the present invention of a kind of foundation, the main difference point of the display system 3a of itself and aforementioned first preferred embodiment is: the transducer 3182e of the 5th preferred embodiment is a kind of image capture unit such as digital camera, be used for according to different sequential capture respectively this screen 32e go up the image frame of forming by different colour systems relevant luminous flux numerical value and pass the numerical value of this relevant luminous flux back this controller 3186e processing., repeat no more because all identical as for other assembly in this with first embodiment.But in other application case, the finished product of the optical mechanical apparatus 30e of the 5th preferred embodiment only comprises some spots light source 302e, 304e and 306e, lens 310e, one polarizing beam splitter 312e, one liquid crystal panel 314e, an one projecting mirror 316e and a controller 3186e, but do not comprise transducer 3182e, 3184e (basic module of also non-this display system of genus 3e), because this transducer 3182e, 3184e can be the existing measurement assembly that manufacturing works use, only before this optical mechanical apparatus 30e dispatches from the factory, do to electrically connect with its controller 3186e to carry out each point-source of light 302e, equal photometric measurement and the correction of 304e and 306e.In case proofread and correct and to finish, when this optical mechanical apparatus 30e dispatches from the factory, promptly removable should existing transducer 3182e, but the consumer need not time-consuming this optical mechanical apparatus 30e to be done equal photometric calibration again; Person very, these lens 310e main purpose is parallel and each point-source of light 302e of homogenizing, the irradiation light of 304e and 306e, under light compensation mechanism of the present invention, these lens 310e then can be a selectivity assembly, with under the normal operation that does not influence this optical mechanical apparatus 30e, more simplify the member of this optical mechanical apparatus 30e.
In addition, as shown in Figure 4, flow chart for the method for a kind of light of preferred embodiment of the present invention compensation, wherein understand for convenient, please cooperate each assembly with reference to the display system 3a of figure 3a, wherein this display system 3a comprises that at least several sections light paths build on this some spots light source 302a respectively, 304a and 306a, lens 310a, polarizing beam splitter 312a, the liquid crystal panel 314a that contains several liquid crystal, between projecting mirror 316a and the screen 32a to transmit the light of several different colour systems, comprise as from this some spots light source 302a, 304a and 306a are via the light path of lens 310a to the irradiation light of several different colour systems of setting up between this polarizing beam splitter 312a, the light path of polarized incident light from this polarizing beam splitter 312a to several different colour systems of setting up the liquid crystal panel 314a, from liquid crystal panel 314a to this polarizing beam splitter 312a to the catoptrical light path of several different colour systems of setting up, the light path of polarized reflection light, and light path from this projecting mirror 316a to the projection light of setting up the screen 32a that comprises several different colour systems from this polarizing beam splitter 312a to several different colour systems of setting up the projecting mirror 316a.The method of this light compensation comprises the following steps:
Step S400 can preestablish with at random a kind of or at any time or start or be lower than the equal luminosity that preset standard value isotype begins to proofread and correct this display system 3a.
Step S410 utilizes at least one transducer such as 3182a, and 3184a senses the numerical value such as the luminosity of the relevant luminous flux of the different colour system light that one of them light paths of aforementioned several sections light paths transmits under different sequential.
Step S420, utilize the control logic of controller 3182a, judge sensor as aforementioned 3182a, 3184a pass back this each about the numerical value of luminous flux and the difference value between the predetermined standard value, that is as judging whether every bit light source 302a, the luminosity of 304a and 306a is all more than or equal to this predetermined standard value; If any point light source 302a wherein, the luminosity of 304a and 306a then carries out next step S425 more than or equal to this predetermined standard value; Otherwise if there is not any point light source 302a, the luminosity of 304a and 306a then carries out another step S430 more than or equal to this predetermined standard value.
Step S425, utilize the control logic of this controller 3182a, according to sensor as aforementioned 3182a, the numerical value of this relevant luminous flux that 3184a passes back and/or this difference value, via the Query Result of a question blank and/or the operation result of an arithmetic element, determine a magnitude of voltage or a current value or a sequential to adjust this point-source of light 302a less than predetermined standard value, the number of the luminosity of 304a and 306a, as heighten this any point light source 302a, the luminosity of 304a and 306a with specific voltage less than predetermined standard value; Return this step S410 afterwards, by this transducer 3182a, 3184a is the numerical value of the relevant luminous flux of this each colour system of sensing once more; By that analogy, make these point-source of lights 302a, the luminosity of 304a and 306a is at last all more than or equal to this predetermined standard value.
Step S430, utilize this transducer 3182a, 3184a is under the different sequential and/or under the same sequential but the numerical value such as the luminosity of the relevant luminous flux of the different colour system light that one of them light path of the aforementioned several sections light paths of sensing transmits on the diverse location of this display system 3a.
Step S440 utilizes the control logic of this controller 3182a, judges sensor as aforementioned 3182a, and whether 3184a is identical between should several relevant numerical value (as luminosity) of luminous flux of difference colour system light to sensing in each sensing region under different sequential; If numerical value (as luminosity) of the relevant luminous fluxes of several that should difference colour system light are inequality, then obtain the difference value between these luminosity, and then carry out next step S445; Otherwise,, then carry out another step S460 if numerical value (as luminosity) of the relevant luminous fluxes of several that should difference colour system light are all identical.
Step S445, utilize the control logic of this controller 3182a, according to sensor as aforementioned 3182a, numerical value and/or this difference value of the relevant luminous flux of several of the different colour system light of 3184a sensing, via the Query Result of this question blank and/or the operation result of this arithmetic element, determine a magnitude of voltage or a current value or a sequential, to reduce this several point-source of light 302a earlier, higher luminosity reaches wherein lower luminosity (but still meeting this predetermined standard value) among 304a and the 306a.
Then, step S450, utilize the control logic of this controller 3182a, judge sensor as aforementioned 3182a, 3184a whether identical (or evenly) between several relevant numerical value (as luminosity) of luminous flux of the same colour system light that under the same sequential different sensing regions is sensed; If the numerical value (as luminosity) of the relevant luminous flux of several of this same colour system light is inequality, then obtains the difference value between these luminosity, and then carry out next step S455; Otherwise, if the numerical value (as luminosity) of the relevant luminous flux of several of this same colour system light is all identical, represent this each point-source of light 302a, the luminosity of 304a and 306a is even all, then carries out another step S460.
Step S455, utilize the control logic of this controller 3182a, according to sensor as aforementioned 3182a, numerical value (as luminosity) and/or this difference value of the relevant luminous flux of several of the same colour system light of 3184a sensing, via the Query Result of this question blank and/or the operation result of this arithmetic element, determine a magnitude of voltage or a current value or a sequential pixel cell with control liquid crystal panel 314a, reduce the pairing liquid crystal light transmittance of luminosity the higher person in this difference sensing region, make the luminosity of this downward modulation reach lower luminosity in this difference sensing region.
Step S460, at last no matter numerical value of the relevant luminous fluxes of several of same or different colour system light all can reach unanimity, and promptly finish the equal photometric calibration of each point-source of light.
Based on as can be known aforementioned, utilize smooth compensation mechanism of the present invention, need not light splitting piece, filter will be set or divide halo to come the light of single colour system light source is dispersed into the light of variant colour system as prior art, also need not to design and dispose accurate respective optical path and set of lenses one by one at the light of variant colour system, can improve the equal luminosity of each light source, therefore can reduce whole ray machine space and reduce manufacturing cost and the correction cost, simultaneously shorten the light path of each light source, so can reduce optical loss than prior art.
Claims (28)
1. an optical mechanical apparatus is applicable in the display system, and it is characterized in that, it comprises:
At least one light source is used to produce an irradiation light;
One lens are used to control the optical path direction of this irradiation light directly towards a polarizing beam splitter;
One polarizing beam splitter receives this irradiation light, to produce the polarized incident light of a correspondence;
One liquid crystal panel has several liquid crystal and is used to receive this polarized incident light, and according to the corresponding reverberation that produces of the light transmittance of this liquid crystal, wherein this reverberation penetrates a polarized reflection light via this polarizing beam splitter;
One projecting mirror receives this polarized reflection light and the projection light of projection one correspondence outside this optical mechanical apparatus;
At least one transducer is used for this irradiation light of sensing, this polarized incident light, this reverberation, this polarized reflection light and this projection light numerical value of one of them relevant luminous flux at least; And
One controller, electrically connect this at least one light source and this liquid crystal panel respectively, this controller further has a core logic and is used for transmitting difference between several relevant numerical value of luminous flux of diverse location under the identical sequential according to transducer, or transmit difference between several relevant numerical value of luminous flux of different sequential same positions according to transducer, determine to adjust the luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal of this at least one light source, reach unanimity up to the numerical value of this several relevant luminous flux.
2. optical mechanical apparatus as claimed in claim 1 is characterized in that, this at least one light source is a point-source of light.
3. optical mechanical apparatus as claimed in claim 2 is characterized in that, this at least one point-source of light is a kind of light-emitting diode (LED).
4. optical mechanical apparatus as claimed in claim 1 is characterized in that these lens are a kind of concavees lens, and the optical path direction that is used to control this irradiation light is directly towards this polarizing beam splitter, and this light path is non-spectral light path.
5. optical mechanical apparatus as claimed in claim 1 is characterized in that, this liquid crystal panel is a kind of liquid crystal on silicon (LCoS) panel, has the light transmittance that several pixel cells are used to control corresponding liquid crystal.
6. optical mechanical apparatus as claimed in claim 1 is characterized in that, what the numerical value of this relevant luminous flux can be for luminous flux, luminosity, illumination and briliancy is wherein a kind of.
7. optical mechanical apparatus as claimed in claim 1 is characterized in that, this at least one transducer can be a kind of image capture unit or a kind of optical inductor.
8. optical mechanical apparatus as claimed in claim 7 is characterized in that, this at least one transducer comprises that several transducers difference positions are on diverse location.
9. optical mechanical apparatus as claimed in claim 8 is characterized in that, the position of this at least one transducer is close to the outside of this liquid crystal panel and receives this polarized incident light.
10. optical mechanical apparatus as claimed in claim 8 is characterized in that, the position of this at least one transducer is close to the outside of this polarizing beam splitter and receives this irradiation light.
11. optical mechanical apparatus as claimed in claim 8 is characterized in that, the position of this at least one transducer is close to this projecting mirror and receives this polarized reflection light.
12. optical mechanical apparatus as claimed in claim 8 is characterized in that, this at least one transducer is positioned at outside this optical mechanical apparatus and receives this projection light.
13. optical mechanical apparatus as claimed in claim 1, it is characterized in that, this core logic is according to the Query Result of a question blank and/or the operation result of an arithmetic element, to determine to adjust the luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal of this at least one light source, wherein this Query Result and/or operation result are used for determining a magnitude of voltage or a current value or sequential luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal to adjust this at least one light source.
14. an optical mechanical apparatus is applicable in the display system, it is characterized in that, it comprises:
The point-source of light of several different colour systems produces the irradiation light of several different colour systems respectively;
One lens, the optical path direction that is used to control the irradiation light of this several different colour systems are parallel to each other and directly towards a polarizing beam splitter;
One polarizing beam splitter directly receives the irradiation light by this several different colour systems of this lens control, to produce several corresponding polarized incident lights respectively;
One liquid crystal panel, have several liquid crystal and be used to receive the polarized incident light of this several different colour systems, and according to the corresponding reverberation that produces several different colour systems of the light transmittance of this liquid crystal, wherein the reverberation of this several different colour systems penetrates the polarized reflection light of several different colour systems via this polarizing beam splitter;
One projecting mirror receives the polarized reflection light of this several different colour systems and comprises the projection light of several different colour systems towards the outer projection of this optical mechanical apparatus; And
One smooth compensation mechanism, has the irradiation light that at least one transducer is used for each different colour system correspondence of sensing, polarized incident light, reverberation, polarized reflection light and projection light be the numerical value of one of them relevant luminous flux at least, an and controller, having a core logic is used for transmitting difference between several relevant numerical value of luminous flux of diverse location under the identical sequential according to transducer, or transmit difference between several relevant numerical value of luminous flux of different sequential same positions according to transducer, determine to adjust the luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal of this at least one light source, reach unanimity up to the numerical value of this several relevant luminous flux.
15. optical mechanical apparatus as claimed in claim 14 is characterized in that, the light-emitting diode (LED) that this some spots light source is different colour systems and being packaged together, and produce the irradiation light of several different colour systems respectively according to different sequential based on a kind of look preface method.
16. optical mechanical apparatus as claimed in claim 14, it is characterized in that, these lens are a kind of concavees lens, and the optical path direction that is used to control the irradiation light of this difference colour system is parallel to each other and directly towards this polarizing beam splitter, and the light path of irradiation light that should the difference colour system is all non-spectral light path.
17. optical mechanical apparatus as claimed in claim 14 is characterized in that, what the numerical value of this relevant luminous flux can be for luminous flux, luminosity, illumination and briliancy is wherein a kind of.
18. optical mechanical apparatus as claimed in claim 14 is characterized in that, this at least one transducer comprises that several transducers difference positions are on diverse location.
19. optical mechanical apparatus as claimed in claim 18 is characterized in that, the outside of contiguous this liquid crystal panel in the position of this at least one transducer and receive the polarized incident light of this several different colour systems according to specific time sequence respectively.
20. optical mechanical apparatus as claimed in claim 18 is characterized in that, the outside of contiguous this polarizing beam splitter in the position of this at least one transducer and receive the irradiation light of this several different colour systems according to specific time sequence respectively.
21. optical mechanical apparatus as claimed in claim 18 is characterized in that, contiguous this projecting mirror in the position of this at least one transducer and receive the polarized reflection light of this several different colour systems according to specific time sequence respectively.
22. optical mechanical apparatus as claimed in claim 18 is characterized in that, this at least one transducer is positioned at the outside of this optical mechanical apparatus and receives the projection light of this several different colour systems according to specific time sequence respectively.
23. optical mechanical apparatus as claimed in claim 14, it is characterized in that, this core logic is via the Query Result of a question blank and/or the operation result of an arithmetic element, determine to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least, wherein this Query Result and/or operation result determine that a magnitude of voltage or a current value or a sequential are to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least.
24. a display system is characterized in that, comprising:
The point-source of light of several different colour systems produces the irradiation light of several different colour systems respectively;
One lens, the optical path direction that is used to control the irradiation light of this several different colour systems are parallel to each other and directly towards a polarizing beam splitter;
One polarizing beam splitter directly receives the irradiation light by this several different colour systems of this lens control, to produce several corresponding polarized incident lights respectively;
One liquid crystal panel, have several liquid crystal and be used to receive the polarized incident light of this several different colour systems, and according to the corresponding reverberation that produces several different colour systems of the light transmittance of this liquid crystal, wherein the reverberation of this several different colour systems penetrates the polarized reflection light of several different colour systems via this polarizing beam splitter;
One screen;
One projecting mirror receives the polarized reflection light of this several different colour systems and comprises the projection light of several different colour systems towards this screen projection, to form an image frame;
At least one transducer, irradiation light, polarized incident light, reverberation, polarized reflection light, projection light and the image frame that is used for each different colour system correspondence of sensing be the numerical value of one of them relevant luminous flux at least; And
One controller, having a core logic is used for transmitting difference between several relevant numerical value of luminous flux of diverse location under the identical sequential according to transducer, or transmit difference between several relevant numerical value of luminous flux of different sequential same positions according to transducer, determine to adjust the luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal of this at least one light source, reach unanimity up to the numerical value of this several relevant luminous flux.
25. light compensation mechanism, be applicable to that a display system and this display system comprise at least: several sections light paths build on respectively between liquid crystal panel, a projecting mirror and the screen that some spots light source, a polarizing beam splitter, contain several liquid crystal to transmit the light of several different colour systems, it is characterized in that this light compensation mechanism comprises:
At least one transducer is arranged in this display system, is used for the numerical value of the relevant luminous flux of the different colour system light that one of them light paths of these several sections light paths of sensing transmits; And
One controller, having a core logic is used for transmitting difference between several relevant numerical value of luminous flux of diverse location under the identical sequential according to transducer, or transmit difference between several relevant numerical value of luminous flux of different sequential same positions according to transducer, determine to adjust the luminous intensity and/or the corresponding number of adjusting the light transmittance of at least a portion liquid crystal of this at least one light source, reach unanimity up to the numerical value of this several relevant luminous flux.
26. smooth compensation mechanism as claimed in claim 25, it is characterized in that, this core logic is via the Query Result of a question blank and/or the operation result of an arithmetic element, determine to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least, wherein this Query Result and/or operation result determine that a magnitude of voltage or a current value or a sequential are to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least.
27. the method for a light compensation, be applicable to that a display system and this display system comprise that at least several sections light paths build on respectively between liquid crystal panel, a projecting mirror and the screen that some spots light source, lens, a polarizing beam splitter, contain several liquid crystal to transmit the light of several different colour systems, it is characterized in that: this method comprises the following steps:
The numerical value of the relevant luminous flux of the different colour system light that one of them light path of these several sections light paths of sensing transmits;
Relatively each numerical value and a predetermined standard value about luminous flux obtain difference value; And
According to the difference between several relevant numerical value of luminous flux of sensing under the different sequential and/or on the diverse location in this display system, determine to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least, reach unanimity up to the numerical value of this several relevant luminous flux.
28. method as claimed in claim 27, it is characterized in that, further comprise the following steps: via the Query Result of a question blank and/or the operation result of an arithmetic element, determine to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least, wherein this Query Result and/or operation result determine that a magnitude of voltage or a current value or a sequential are to adjust these several point-source of lights one of them luminous intensity and/or corresponding number of adjusting the light transmittance of at least a portion liquid crystal at least.
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| CN107784982B (en) * | 2016-08-25 | 2020-10-30 | 立景光电股份有限公司 | Liquid crystal silicon-coated display and brightness adjusting method thereof |
| CN109976030B (en) * | 2019-05-20 | 2022-04-19 | 京东方科技集团股份有限公司 | Total reflection display screen, control method thereof and display device |
| CN113311524B (en) * | 2021-07-05 | 2022-04-01 | 合肥联宝信息技术有限公司 | Method and equipment for correcting light uniformity |
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| CN101131516A (en) * | 2006-08-24 | 2008-02-27 | 三星电子株式会社 | Display device and backlight unit comprising a holographic optical element |
| CN101183515A (en) * | 2006-11-15 | 2008-05-21 | 三星电子株式会社 | Method, medium, and system implementing wide angle viewing |
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| CN101131516A (en) * | 2006-08-24 | 2008-02-27 | 三星电子株式会社 | Display device and backlight unit comprising a holographic optical element |
| CN101183515A (en) * | 2006-11-15 | 2008-05-21 | 三星电子株式会社 | Method, medium, and system implementing wide angle viewing |
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