CN100507705C - Projector - Google Patents
Projector Download PDFInfo
- Publication number
- CN100507705C CN100507705C CNB2005100983189A CN200510098318A CN100507705C CN 100507705 C CN100507705 C CN 100507705C CN B2005100983189 A CNB2005100983189 A CN B2005100983189A CN 200510098318 A CN200510098318 A CN 200510098318A CN 100507705 C CN100507705 C CN 100507705C
- Authority
- CN
- China
- Prior art keywords
- aforementioned
- light
- control
- projector
- liquid crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention provides a projector which not only carries out correct gray level control of light modulation elements among display images, but also reduces the unevenness of image display. The projector has a light source unit (2), liquid crystal light valves (33r, 33g, 33b) which modulate the light emitted by the light source unit (2) based on image data, a light adjusting mechanism (32) which adjusts the quantity of the incident light of liquid crystal light valves (33r, 33g, 33b) as well as a control unit which controls the liquid crystal light valves (33r, 33g, 33b) and the light adjusting mechanism (32), wherein the control unit carries out light adjusting control of the light adjusting mechanism (32) which adjusts the quantity of the incident light of the liquid crystal light valves (33r, 33g, 33b) according to the luminance distribution graph of the image data; moreover, the control unit also carries out correction control of the liquid crystal light valves (33r, 33g, 33b) during correcting the display unevenness of the image data based on the adjustment of the quantity of light.
Description
Technical field
The present invention relates to possess modulation from the optical modulation element of the light of light source cell with adjust the projector of light modulation unit of light quantity that is incident in the light of optical modulation element from light source cell.
Background technology
Always is known as optical modulation element with the projector of LCD (LCD).In this occasion, in LCD, the voltage that puts on inner liquid crystal molecule by control makes the liquid crystal molecule displacement, and the gray shade scale of LCD changes corresponding to this shift amount, and its projected light projection is in screen and display image.For example, when showing the image of dark-coloured class, apply the control of voltage at low-voltage region.But, in general, because correctly controlling the shift amount of liquid crystal molecule at low-voltage region is difficult, be such problem of difficulty so in this projector, exist the gray shade scale control of in the high dynamic range that for example comprises dark areas, correctly carrying out LCD when the display image.As the technology that can address this problem, the spy opens that disclosed projection display device is known in the 2001-100699 communique.This projection display device possesses illumination light quantity preparer structures such as the aperture between the photomodulators such as being located at light source and display panels, by controlling this illumination light quantity preparer structure, the light quantity ground that can adjust the light that is incident in display panels according to the briliancy of shown image constitutes.Therefore, for example, when the image that shows dark-coloured class, the light quantity that is incident in the light of display panels by minimizing can be with the high dynamic range display image.
[patent documentation 1] spy open the 2001-100699 communique (the 8th page, Figure 10)
, in projection display device always, exist following problem.That is to say, in this projection display device, for example by adjust the light quantity of the light that is incident in display panels by the illumination light quantity preparer structure that aperture constituted.But, when adjusting light quantity, exist and result from the light quantity heterogeneity of the light that is incident in display panels with this method, the such problem of luminance nonuniformity (shade) or look inequality (following both are collectively referred to as " showing uneven ") takes place on shown image.
Here, in projection display device always, though also considered to replace above-mentioned illumination light quantity preparer structure that the light source driving circuit of direct adjusting light source briliancy is set, but in the occasion of directly regulating the light source briliancy, because the job insecurity of light source sometimes, usually the range of adjustment of light source briliancy narrows down, so briliancy control becomes unstable when showing the image of dark-coloured class, produces the situation that brightness changes.
Summary of the invention
The present invention makes in view of this problem, and purpose is to provide a kind of correct gray shade scale control to optical modulation element that both can carry out when image shows, the projector that can reduce the demonstration inequality of image again.
Be used to realize the projector that the present invention relates to of above-mentioned purpose, possesses light source cell, modulate optical modulation element from the light of this light source cell based on view data, adjustment is incident in the light modulation unit of light quantity of the light of aforementioned lights modulator element from aforementioned light source cell, and the control module of control aforementioned lights modulator element and aforementioned light modulation unit, aforementioned control module, the brightness adjustment control of adjusting aforementioned light quantity according to the briliancy distribution pattern of aforementioned view data is carried out in aforementioned light modulation unit, and the aforementioned lights modulator element is carried out the Correction and Control of correction based on the demonstration inequality of the aforementioned view data of the adjustment of aforementioned light quantity.
According to this projector, then because by brightness adjustment control is carried out in the light modulation unit, can carry out the gray shade scale control in suitable gray shade scale zone, so can correctly carry out gray shade scale control to optical modulation element.In addition, because, inequality takes place, also can offset this inequality, so can reduce the demonstration inequality of image reliably even be incident in the light quantity of the light of optical modulation element by optical modulation element is carried out Correction and Control.
In addition, according to projector of the present invention, in above-mentioned projector, possess storage respectively with the adjustment amount of the corresponding aforementioned light quantity of aforementioned briliancy distribution pattern of a plurality of aforementioned view data, the storage unit of the correction content of using with the corresponding aforementioned Correction and Control of this each light modulation amount respectively, aforementioned control module reads respectively from aforementioned storage unit and carries out aforementioned brightness adjustment control with the corresponding aforementioned light modulation amount of the aforementioned briliancy distribution pattern of the aforementioned view data that should show, and reads with the corresponding aforementioned correction content of this light modulation amount from aforementioned storage unit and to carry out aforementioned Correction and Control.
According to this projector, then, can carry out brightness adjustment control and Correction and Control at high speed by reading with the corresponding light modulation amount of the briliancy distribution pattern of shown view data from storage unit and revising content and carry out brightness adjustment control and Correction and Control.
In addition, according to projector of the present invention, in above-mentioned projector, possesses a pair of lens arra that is disposed between aforementioned lights source unit and the aforementioned lights modulator element, the moving part that aforementioned light modulation unit possesses shadow shield and this shadow shield is moved, aforementioned control module makes aforementioned shadow shield mobile light that blocks from this lens arra between aforementioned a pair of lens arra carry out aforementioned brightness adjustment control by the forward moving part of stating.
According to this projector, then shading light is adjusted light quantity by shadow shield is moved between a pair of lens arra, can not only be easy formation but also carry out the adjustment of light quantity reliably.
In addition, projector of the present invention, in above-mentioned projector, aforementioned lens arra possesses a plurality of optical elements and constitutes, and aforementioned control module moves aforementioned shadow shield with the unit of aforementioned each optical element.Particularly, in the occasion that a plurality of optical elements periodically dispose with predetermined arrangement pitches, aforementioned control module is that unit moves aforementioned shadow shield with aforementioned arrangement pitches.
According to this projector, be that unit moves shadow shield then by arrangement pitches with the optical element in the lens arra, can be according to the degree of the inequality of the incident light quantity of the specific in advance light that adjustment produced because of light quantity of the amount of movement of shadow shield.Therefore, only depend on by corresponding and patterned correction content and carry out the just demonstration inequality of correction image reliably of Correction and Control with each amount of movement of shadow shield.And then, the memory capacity of correction chart is minimized.
In addition, according to projector of the present invention, in above-mentioned projector, aforementioned control module is that unit moves aforementioned shadow shield with the length of the 1/n (n is the integer more than or equal to 2) of the arrangement pitches of aforementioned each optical element.
According to this projector, be that unit moves shadow shield then by length with the 1/n of the arrangement pitches of optical element, can carry out meticulousr brightness adjustment control according to the briliancy distribution pattern of the image that should show.
In addition, according to projector of the present invention, in above-mentioned projector, possesses a pair of lens arra that is disposed between aforementioned lights source unit and the aforementioned lights modulator element, aforementioned light modulation unit possesses and is disposed at the liquid crystal cell between the aforementioned a pair of lens arra and constitutes, and aforementioned control module changes light transmission by control foregoing liquid crystal element and carries out aforementioned brightness adjustment control.
According to this projector, then being disposed at liquid crystal cell between a pair of lens arra by control changes light transmission and adjusts light quantity, can partly not carry out shading light, therefore can make light ratio be incident in optical modulation element more equably, the result can suppress to show uneven fully.
In addition, according to projector of the present invention, in above-mentioned projector, aforementioned control module is carried out the Correction and Control of correction based on the demonstration inequality of the earlier figures picture of the adjustment of the aforementioned light quantity of being undertaken by the foregoing liquid crystal element to this liquid crystal cell when the aforementioned lights modulator element is carried out aforementioned Correction and Control.
According to this projector, then by when optical modulation element is carried out Correction and Control, liquid crystal cell being carried out Correction and Control, for example, even the grinding inequality during because of manufacturing produces transmissivity in liquid crystal cell unequal, also can carry out the Correction and Control of correction gray shade scale so that offset this transmissivity inequality to liquid crystal cell, and when only depending on this Correction and Control to control the light quantity of the light that is incident in optical modulation element to complete and homogeneous, can almost entirely revise the demonstration inequality by optical modulation element being carried out Correction and Control.
In addition, projector of the present invention, in above-mentioned projector, the briliancy distribution pattern of view data is stipulated by the dynamic range and the average luminance of the briliancy distribution of image.Whereby, can realize demonstration corresponding to the high dynamic range of the feature of view data.
In addition, projector of the present invention, in above-mentioned projector, uneven with to result from the space of the spatial configuration of shadow shield and the optical modulation element that produces inconsistent illumination corresponding based on the demonstration of the view data of the adjustment of light quantity.In this occasion, the degree of freedom height of the shape of shadow shield, configuration, the range of adjustment of light modulation also can obtain bigger.
Description of drawings
Fig. 1 is the block diagram of the formation of expression projector 1.
Fig. 2 is the pie graph that the summary of expression light source cell 2 and optical system 3 constitutes.
Fig. 3 is the pie graph of the dimming mechanism 32 under the non-dimming state.
Fig. 4 is the graph of a relation of the relation of expression average luminance (APL), dynamic range (DR) and briliancy distribution pattern A1～A9.
Fig. 5 (A), (B) are the histograms that the briliancy of the display frame figure of image G1 and image G1 distributes.
Fig. 6 is shadow shield 51 pie graph of the dimming mechanism 32 when mobile by three times the amount of spacing P.
Fig. 7 (A), (B) are the histograms that the briliancy of the display frame figure of image G2 and image G2 distributes.
Fig. 8 is shadow shield 51 pie graph of the dimming mechanism 32 when mobile by the amount of the twice of spacing P.
Fig. 9 (A), (B) are the histograms that the briliancy of the display frame figure of image G3 and image G3 distributes.
Figure 10 is shadow shield 51 pie graph of the dimming mechanism 32 when mobile by the amount of spacing P.
Figure 11 is the graph of a relation of the relation of expression briliancy distribution pattern, light modulation amount, gray shade scale zone and correction pattern.
Figure 12 is the process flow diagram of projection process 60.
Figure 13 is to be the pie graph that unit makes the dimming mechanism 32 that shadow shield 51 moves with the length T.
Figure 14 is the pie graph of optical system 3A.
The explanation of label
1 projector, 2 light source cells, 4 control modules, 5 storeies, 31a, 31b lens arra, 32 dimming mechanisms, 33,33b, 33g, 33r liquid crystal light valve, 41 optical elements, 51 shadow shields, 52 moving parts, 71 liquid crystal cells, A1～A9 briliancy distribution pattern, L light, Lb blue light, the Lg green light, Lr red light, Lw light, the P spacing, C1, C2, C3 correction pattern, T length
Embodiment
Below, with reference to accompanying drawing, describe with regard to the optimal morphology of projector of the present invention.Projector 1 shown in Fig. 1 is one of projector of the present invention example, possesses light source cell 2, optical system 3, control module 4 and storer 5 and constitutes.Light source cell 2, as an example, possess the contour briliancy lamp of metal halide lamp or high-pressure mercury-vapor lamp, under the control of control module 4, light, ejaculation comprises the light Lw (below, do not distinguish these each light time be also referred to as " light L ") of red light Lr, green light Lg and blue light Lb.
Optical system 3, as shown in Figure 2, possess a pair of lens arra 31a, 31b, overlapping lens 42, dimming mechanism 32, liquid crystal light valve 33r, 33g, 33b (below, when not distinguishing, be also referred to as " liquid crystal light valve 33 "), dichronic mirror 34r, 34b, catoptron 35a～35d, relay lens 36,36, prism 37 and projecting lens 38.Lens arra 31a has the function of cutting apart optical element as the light beam that the light beam from illuminator is divided into a plurality of part light, possess with the face of lighting optical axis quadrature in be arranged in rectangular a plurality of optical elements 41,41... with predetermined spacing (arrangement pitches) P and constitute (with reference to Fig. 3), lens arra 31b is an optical element of regulating the angle of divergence of a plurality of segment beams of being cut apart by lens arra 31a, with lens arra 31a possess equally with the face of lighting optical axis quadrature in be arranged in rectangular a plurality of optical elements 41,41... and constitute.Overlapping lens 42 are also referred to as collector lens, and optically focused has passed through a plurality of segment beams of a pair of lens arra 31a, 31b and made on its image forming area that is overlapped in liquid crystal light valve 33.Dimming mechanism 32 is one of the light modulation unit among the present invention example, and is as shown in the drawing, possesses shadow shield 51,51 and moving part 52,52.In this occasion, it is that unit ground is moving and shading light L on approaching mutually direction between two lens arra 31a, the 31b according to the control of control module 4 with the spacing P of optical element 41,41... that dimming mechanism 32 makes shadow shield 51, carries out the adjustment (below be also referred to as " light modulation ") to the light quantity of the light L that is incident in each liquid crystal light valve 33 whereby.
Liquid crystal light valve 33r, 33g, 33b are equivalent to the optical modulation element among the present invention, along with the control of control module 4, and based on view data Dg, difference modulated red coloured light Lr, green light Lg and blue light Lb.Dichronic mirror 34r, 34b, catoptron 35a～35d and relay lens 36,36 as shown in Figure 2, are disposed in the light path of light L and make light L be incident in each liquid crystal light valve 33.In this occasion, dichronic mirror 34r makes red light Lr transmission, reflects green Lg and blue light Lb.In addition, dichronic mirror 34b makes blue light Lb transmission, reflects green Lg.In addition, catoptron 35a～35d reflected light L (total reflection).Thereby the only red light Lr in the middle of the light Lw is incident in liquid crystal light valve 33r, and the only green light Lg in the middle of the light Lw is incident in liquid crystal light valve 33g, and the only blue light Lb in the middle of the light Lw is incident in liquid crystal light valve 33b.Prism 37 synthetic red light Lr, green light Lg and the blue light Lb that modulated by each liquid crystal light valve 33r, 33g, 33b.Projecting lens 38 amplifies also projection as shown in fig. 1 to the light (projected light Lp) that is synthesized by prism 37 in screen 10.
Next, describe with reference to the relation of accompanying drawing with regard to briliancy distribution pattern, light modulation amount and correction pattern.On liquid crystal light valve 33 its characteristics, show that the correct gray shade scale control when the image of dark-coloured class is the comparison difficulty.Therefore, image G1 shown in the image pattern 5 (A) is such, for example, for (with reference to the histogram of Fig. 5 (B)) the image G1 that shows correctly that with its briliancy that should show APL is low and DR is narrow, just its briliancy distribution pattern is classified into the image G1 of the briliancy distribution pattern A9 shown in Fig. 4, be necessary to be scheduled to light modulation amount (the shading amount of light L) more greatly, reduce the light quantity of the light L that is incident in liquid crystal light valve 33.Therefore, as shown in Figure 11, the data of expression light modulation amount " greatly " are corresponding with briliancy distribution pattern A9.In this occasion, when control module 4 is carried out brightness adjustment control based on the data of expression light modulation amount " greatly ", for example, as shown in Figure 6, the shadow shield 51,51 of dimming mechanism 32 is respectively by moving and shading light L in the light path of triplication between lens arra 31a, 31b of the spacing P that is equivalent to the optical element 41 among the lens arra 31a.Whereby, carry out the light modulation of light modulation amount " greatly ".The result, as shown in Figure 11, in except the scope in the gray shade scale zone in low territory and high slightly territory, control by the correct modulation of carrying out can carrying out light L to the gray shade scale control of liquid crystal light valve 33, can be with the briliancy that should show display image G1 correctly.
In addition, image G2 shown in the image pattern 7 (A) is such, for example, showing that APL and DR are moderate (with reference to the histogram of Fig. 7 (B)) image G2, just its briliancy distribution pattern is classified into when the image G2 of the briliancy distribution pattern A5 shown in Fig. 4, because the dark areas in the image G2 is few,, make the light quantity of the light L that is incident in liquid crystal light valve 33 become moderate so the light modulation amount is predetermined to be moderate.Therefore, as shown in Figure 11, expression light modulation amount " in " data corresponding with briliancy distribution pattern A5.In this occasion, control module 4 based on expression light modulation amount " in " data carry out brightness adjustment control when, for example, as shown in Figure 8, the shadow shield 51,51 of dimming mechanism 32 is respectively by moving and shading light L in the light path of doubling dose between lens arra 31a, 31b of the spacing P that is equivalent to the optical element 41 among the lens arra 31a.Whereby, carry out the light modulation amount " in " light modulation.The result, as shown in Figure 11, in except the scope in the gray shade scale zone in low territory and high territory by carrying out the gray shade scale control of liquid crystal light valve 33 and can carry out the more correct modulation control of light L, can be with the briliancy that should show display image G2 correctly.
In addition, image G3 shown in the image pattern 9 (A) is such, for example, showing APL height and wide (with reference to the histogram of Fig. 9 (B)) the image G3 of DR, just show its briliancy distribution pattern be classified into the image G3 of the briliancy distribution pattern A1 shown in Fig. 4 (below, be also referred to as " image G " when not distinguishing with above-mentioned image G1, G2) when, cross the demonstration in the light tone zone in the low then image G3 difficulty that becomes because if be incident in the light quantity of the light L of liquid crystal light threshold 33, so preferably be scheduled to forr a short time to the light modulation amount.Therefore, as shown in Figure 11, the data of expression light modulation amount " little " are corresponding with briliancy distribution pattern A1.In this occasion, when control module 4 is carried out brightness adjustment control based on the data of expression light modulation amount " little ", for example, as shown in Figure 10, the shadow shield 51,51 of dimming mechanism 32 moves and shading light L in the light path of amount between lens arra 31a, 31b by the spacing P of the optical element 41 among the suitable lens arra 31a respectively.Whereby, carry out the light modulation of light modulation amount " little ".As a result, as shown in Figure 11, in nearly all gray shade scale zone, can carry out the correct modulation control of light L by carrying out to the gray shade scale of liquid crystal light valve 33 control, can be with the briliancy that should show display image G3 correctly.
On the other hand, when having carried out light modulation, shown in the incident light quantity distribution pattern B1 of Fig. 6, in the incident light quantity of the light L that is incident in liquid crystal light valve 33, produce uneven with shadow shield 51,51, result from the inequality of this incident light quantity, take place to show uneven sometimes among the image G.Thisly show the configuration in uneven space corresponding to shadow shield 51,51 and produce that the opening shape that results from by shadow shield 51,51 illumination light of being delimited changes, the briliancy changes in distribution in the space of light L, liquid crystal light valve 33 is thrown light on inconsistently as a result.Therefore, for example, the difference of offsetting incident light quantity by the gray shade scale that improves the few zone of incident light quantity in the liquid crystal light valve 33 is carried out the Correction and Control of the demonstration inequality of correction image G.Moreover, in this figure and Fig. 8, Figure 10, about incident light quantity distribution pattern B1 and incident light quantity distribution pattern B2 described later, B3, along the longitudinal axis panel face in the liquid crystal light valve 33 (with reference to Fig. 6) is shown schematically, the incident light quantity of the light L that is incident in liquid crystal light valve 33 schematically is shown along transverse axis.
In this occasion, when carrying out brightness adjustment control with the data of above-mentioned briliancy distribution pattern A9 corresponding expression light modulation amount " greatly ", as shown in the incident light quantity distribution pattern B1 of Fig. 6, incident light quantity reduces in the scope of the ratio broad at the peripheral part place of liquid crystal light valve 33.Therefore, as shown in Fig. 6,11, the correction pattern C1 of gray shade scale of scope of ratio broad of peripheral part that is used for improving liquid crystal light valve 33 is corresponding with briliancy distribution pattern A9.Moreover, in two figure and Fig. 8,10,, panel face in the liquid crystal light valve 33 (with reference to Fig. 6) schematically is shown along the longitudinal axis about correction pattern C1 and correction pattern C2 described later, C3, the correction of the gray shade scale in the Correction and Control schematically is shown along transverse axis.
In addition, based on the corresponding expression light modulation of above-mentioned briliancy distribution pattern A5 amount " in " data when carrying out brightness adjustment control, as shown in the incident light quantity distribution pattern B2 of Fig. 8, incident light quantity reduces in the scope of the moderate width at the peripheral part place of liquid crystal light valve 33.Therefore, as shown in Fig. 8,11, the correction pattern C2 of gray shade scale of scope of moderate width of peripheral part that is used for improving liquid crystal light valve 33 is corresponding with briliancy distribution pattern A5.And then, when carrying out brightness adjustment control with the data of above-mentioned briliancy distribution pattern A1 corresponding expression light modulation amount " little ", as shown in the incident light quantity distribution pattern B3 of Figure 10, incident light quantity reduces in the narrow scope at the peripheral part place of liquid crystal light valve 33.Therefore, as shown in Figure 10,11, the correction pattern C3 of gray shade scale of narrow scope at peripheral part place that is used for improving liquid crystal light valve 33 is corresponding with briliancy distribution pattern A1.Moreover, as shown in Figure 11, also be about briliancy distribution pattern A2～A4, A6～A8, with above-mentioned same,, corresponding with each briliancy distribution pattern respectively with correction pattern the light modulation amount of the best for the briliancy that should show display image correctly.
Next, with regard to one of the work of projector 1 example, describe with reference to accompanying drawing.In this projector 1, when power supply dropped into, control module 4 was carried out the projection process 60 shown in Figure 12.In this projection process 60, control module 4 differentiates whether exported view data Dg (step 62) from external device (ED)s such as television antenna or DVD player making light source cell 2 light back (step 61).Differentiating when exporting the APL and the DR (step 63) of control module 4 image (for example image G1 shown in Fig. 5 (A)) that calculating should show based on view data Dg.Then, control module 4 retrieval is stored in the tables of data in the storer 5, the specific APL that calculated and the briliancy distribution pattern (step 64) of DR of approaching most.In this occasion, as shown in this Fig because the APL of image G1 is low and DR is narrow, thus control module 4 as immediate briliancy distribution pattern, the briliancy distribution pattern A9 shown in the specific pattern 4.
Then, control module 4 reads data with specific briliancy distribution pattern A9 corresponding expression light modulation amount " greatly " from tables of data, to dimming mechanism 32 execution brightness adjustment control (step 65).In this occasion, control module 4 is based on the Data Control dimming mechanism 32 of the light modulation amount that has read, as shown in Figure 6, makes in the light path that shadow shield 51,51 moves between lens arra 31a, the 31b by the triplication of the spacing that is equivalent to optical element 41 respectively.Whereby, the part of light L is blocked and is incident in the light L modulated light (that is to say, corresponding to light modulation amount " greatly " dim light) greatly of each liquid crystal light valve 33.Then, control module 4 reads the data of using with the corresponding correction pattern C1 of briliancy distribution pattern A9 (step 66) from tables of data.Then, control module 4 is controlled each liquid crystal light valve 33 and light modulated L based on view data Dg.At this moment, the data that control module 4 is used based on the correction pattern C1 that has read are carried out Correction and Control so that improve the gray shade scale (step 67) of the low scope of incident light quantity to each liquid crystal light valve 33.Therewith correspondingly, by each liquid crystal light valve 33 difference light modulated L, projected light Lp is projected on the screen 10.At this moment, carry out Correction and Control by control module 4, shown in light quantity distribution D graphics 1 after the correction of Fig. 6, inequality to the incident light quantity of the light L of liquid crystal light valve 33 incidents is almost offset, its result, can reduce resulting from the demonstration inequality of inequality of incident light quantity, can be with the briliancy that should show display image G1 correctly.
Then, control module 4 judges based on view data Dg whether scene (image) has changed (step 68).At this moment, control module 4 is not when scene changes, and execution in step 68 repeatedly, when scene changes, and execution in step 63,64, the APL and the immediate briliancy distribution pattern of DR of the image (for example image G2 shown in Fig. 7 (A)) of specific and next scene.In this occasion, moderate as shown in this Fig because the APL of image G2 and DR are all, so control module 4 as immediate briliancy distribution pattern, the briliancy distribution pattern A5 shown in the specific pattern 4.Then, control module 4 from the tables of data in the storer 5 read with the corresponding expression light modulation of briliancy distribution pattern A5 amount " " data, dimming mechanism 32 is carried out brightness adjustment control, whereby as shown in Figure 8, make shadow shield 51,51 by moving (step 65) in the light path of doubling dose between lens arra 31a, 31b of the spacing that is equivalent to optical element 41 respectively.Then, read at control module 4 (step 66) after the data of using with the corresponding correction pattern C2 of briliancy distribution pattern A5, control each liquid crystal light valve 33 and light modulated L based on view data Dg.At this moment, control module 4 is carried out Correction and Control (step 67) based on the data that the correction pattern C2 that reads from tables of data uses to each liquid crystal light valve 33.In view of the above, by each liquid crystal light valve 33 difference light modulated L, projected light Lp is projected in screen 10.In this occasion, control module 4 is by carrying out Correction and Control, as shown in light quantity distribution D graphics 2 after the correction of Fig. 8, almost offsets to the inequality of the incident light quantity of the light L of liquid crystal light valve 33 incidents, and result images G2 correctly is shown with the briliancy that should show.
Then, control module 4 execution in step 68.At this moment, execution in step 63,64 when scene changes, the APL of the specific image (for example image G3 shown in Fig. 9 (A)) that approaches next scene most and the briliancy distribution pattern of DR.In this occasion, as shown in this Fig because APL height and the DR of image G3 are wide, thus control module 4 as immediate briliancy distribution pattern, the briliancy distribution pattern A1 shown in the specific pattern 4.Then, control module 4 reads data with briliancy distribution pattern A1 corresponding expression light modulation amount " little " from the tables of data in the storer 5, dimming mechanism 32 is carried out brightness adjustment control, whereby, as shown in Figure 10, make by the amount of the spacing that is equivalent to optical element 41 respectively and move (step 65) in the light path of shadow shield 51,51 between lens arra 31a, 31b.Then, control module 4 reads (step 66) after the data of using with the corresponding correction pattern C3 of briliancy distribution pattern A1, controls each liquid crystal light valve 33 light modulated L based on view data Dg.At this moment, control module 4 is carried out Correction and Control (step 67) based on the data that the correction pattern C3 that reads from tables of data uses to each liquid crystal light valve 33.In view of the above, each liquid crystal light valve 33 is light modulated L respectively, and projected light Lp projection is in screen 10.In this occasion, control module 4 is by carrying out Correction and Control, as shown in light quantity distribution D graphics 3 after the correction of Figure 10, almost offsets to the inequality of the incident light quantity of the light L of liquid crystal light valve 33 incidents, and result images G3 correctly is shown with the briliancy that should show.Then, control module 4 repeated execution of steps 68,63～67 are just carried out brightness adjustment control and Correction and Control whenever scene changes whereby.Moreover when moment ground (short time in) switch light modulation amount, dimming state sharply changes, and the user feels glimmer (flash of light of luminance variations fierceness) sometimes.Therefore, when detecting scene and change in reflection when the light modulation amount that APL and DR obtained of next scene, preferably spend certain hour to make the light modulation quantitative changeization at leisure.
So, according to this projector 1, then because, can carry out gray shade scale control, so can correctly carry out gray shade scale control to liquid crystal light valve 33 in suitable gray shade scale zone by dimming mechanism 32 is carried out brightness adjustment control.In addition,, produce unevenly in the incident light quantity of light L of liquid crystal light valve 33, also can offset this inequality, so can reduce the demonstration inequality of image G reliably even be incident in because by liquid crystal light valve 33 is carried out Correction and Control.
In addition, corresponding light modulation amount of briliancy distribution pattern and correction pattern by the image G that reads from tables of data and should show are carried out brightness adjustment control and Correction and Control, for example, with change whenever image G (scene), just compare and can carry out brightness adjustment control and Correction and Control at high speed according to the method for the briliancy distribution pattern calculating light modulation amount of image G and correction pattern.
And then, between lens arra 31a, 31b, move the light quantity of adjusting light L by making shadow shield 51, can be that easy formation is carried out the light quantity adjustment again reliably.
In addition, control module 4 by the spacing P with optical element 41 be unit shadow shield 51 is moved, can be according to the degree of the inequality of the incident light quantity of the specific in advance light L that produces because of light modulation of the amount of movement of shadow shield 51.Therefore, only depending on just can be reliably and the demonstration inequality of correction image G simply by carrying out Correction and Control with the corresponding and patterned correction pattern of each amount of movement of shadow shield 51.According to this formation, then because can limit correction conditions in advance, and the storer 5 that tables of data is used also can be Min., so constituting projector 1 at an easy rate correspondingly.
Moreover, the invention is not restricted to above-mentioned formation.For example, though top just with comprising that respectively the example with the tables of data of 9 kinds of corresponding light modulation amounts of briliancy distribution pattern A1～A9 and correction pattern is described, the data of tables of data constitute and are not limited thereto and can at random change.In this occasion, can be scheduled to the kind of briliancy distribution pattern more than above-mentioned 9 kinds of ground, by using the tables of data that comprises with corresponding light modulation amount of each briliancy distribution pattern and correction pattern, carry out the brightness adjustment control and the Correction and Control of very fine.In addition, though it is top just when brightness adjustment control, with the spacing P of optical element 41 be unit shadow shield 51 is moved example be described, but length (the cutting apart length) T that also can adopt as shown in Figure 13,1/n with the spacing P of optical element 41 (n is more than or equal to 2 integer for example 4) be unit shadow shield 51 is moved formation.Constitute according to this, then can carry out meticulousr brightness adjustment control according to the briliancy distribution pattern of the image that should show.In addition, control module 4 also can not adopt tables of data, and adopts the formation of calculating light modulation amount and correction pattern according to the briliancy distribution pattern of image.
In addition, though for example understand the optical system 3 that possesses the mechanical dimming mechanism 32 that comprises shadow shield 51 and moving part 52, but as shown in Figure 14, also can replace dimming mechanism 32, employing possesses the liquid crystal cell 71 that is disposed between a pair of lens arra 31a, the 31b, the multistage or optical system 3A that infinitely carries out the light modulation of light L on the optics.In this constituted, control module 4 control the liquid crystal cells 71 and change light transmission is adjusted the light quantity from the light L of lens arra 31a were carried out light modulation (dim light) whereby.In this occasion, because partly do not block light L from lens arra 31a, so can make light L be incident in liquid crystal light valve 33 more equably, the result can suppress to show uneven fully.In addition, in this constitutes, for example, even the uneven transmissivity that produces liquid crystal cell 71 of the grinding when making is unequal, also can result from the Correction and Control of demonstration inequality of inequality of this transmissivity by liquid crystal light valve 33 being carried out be used for revising, reduce reliably show uneven.In addition, in this constitutes, can adopt the method for liquid crystal light valve 33 and liquid crystal cell 71 both sides being carried out Correction and Control.Specifically, when above-mentioned projection process 60, control module 4 is carried out the Correction and Control (Correction and Control to the liquid crystal cell execution among the present invention) of correction gray shade scale so that offset the inequality of this transmissivity according to the inequality of the transmissivity of liquid crystal cell 71 to liquid crystal cell 71, and only depend on this Correction and Control can't complete and homogeneous ground control during to the incident light quantity of the light L of liquid crystal light valve 33 incidents, liquid crystal light valve 33 is carried out Correction and Control.Whereby, can almost entirely revise the demonstration inequality.
Moreover, also can partly block light L by liquid crystal cell 71 from lens arra 31a.In this occasion, control of the blocking of light L, optical system 3 etc., same with example illustrated among Fig. 2,6,8,10 etc.
Claims (12)
1. projector, it possesses light source cell, based on the optical modulation element of view data modulation from the light of this light source cell, adjustment is incident in the light modulation unit of light quantity of the light of aforementioned lights modulator element from aforementioned light source cell, and the control module of control aforementioned lights modulator element and aforementioned light modulation unit
Aforementioned control module, the brightness adjustment control of adjusting aforementioned light quantity according to the briliancy distribution pattern of aforementioned view data is carried out in aforementioned light modulation unit, and the aforementioned lights modulator element is carried out the Correction and Control of correction based on the demonstration inequality of the aforementioned view data of the adjustment of aforementioned light quantity.
2. projector as claimed in claim 1, it possesses the light modulation amount that stores respectively with the corresponding aforementioned light quantity of aforementioned briliancy distribution pattern of a plurality of aforementioned view data, the storage unit of the correction content of using with the corresponding aforementioned Correction and Control of this each light modulation amount respectively
Aforementioned control module reads with the corresponding aforementioned light modulation amount of the aforementioned briliancy distribution pattern of shown aforementioned view data from aforementioned storage unit and carries out aforementioned brightness adjustment control, and reads with the corresponding aforementioned correction content of this light modulation amount from aforementioned storage unit and to carry out aforementioned Correction and Control.
3. projector as claimed in claim 1 or 2, it possesses a pair of lens arra that is disposed between aforementioned lights source unit and the aforementioned lights modulator element,
The moving part that aforementioned light modulation unit possesses shadow shield and this shadow shield is moved.
4. projector as claimed in claim 3, wherein, aforementioned control module makes aforementioned shadow shield move the light that blocks from this lens arra between aforementioned a pair of lens arra by the forward moving part of stating, and carries out aforementioned brightness adjustment control.
5. projector as claimed in claim 3, wherein,
Aforementioned lens arra possesses a plurality of optical elements,
Aforementioned control module is that unit moves aforementioned shadow shield with aforementioned each optical element.
6. projector as claimed in claim 5, wherein, aforementioned a plurality of optical elements periodically dispose with predetermined arrangement pitches,
Aforementioned control module is that unit moves aforementioned shadow shield with aforementioned arrangement pitches.
7. projector as claimed in claim 5, wherein, aforementioned control module is a unit with the length of the 1/n of the arrangement pitches of aforementioned each optical element, wherein n is the integer more than or equal to 2, and aforementioned shadow shield is moved.
8. projector as claimed in claim 1 or 2 wherein, possesses a pair of lens arra that is disposed between aforementioned lights source unit and the aforementioned lights modulator element,
Aforementioned light modulation unit possesses the liquid crystal cell that is disposed between the aforementioned a pair of lens arra.
9. projector as claimed in claim 8, wherein, aforementioned control module changes light transmission by control foregoing liquid crystal element and carries out aforementioned brightness adjustment control.
10. projector as claimed in claim 9, wherein, aforementioned control module is carried out the Correction and Control of demonstration inequality of the earlier figures picture of the adjustment of revising the aforementioned light quantity of being carried out based on the foregoing liquid crystal element to this liquid crystal cell when the aforementioned Correction and Control of carrying out the aforementioned lights modulator element.
11. projector as claimed in claim 1, wherein, the briliancy distribution pattern of aforementioned view data is stipulated by dynamic range and average luminance that the briliancy of image distributes.
12. projector as claimed in claim 3, wherein, based on the demonstration inequality of the aforementioned view data of the adjustment of aforementioned light quantity, inconsistent illumination is corresponding with resulting from the space of the spatial configuration of aforementioned shadow shield and the aforementioned lights modulator element that produces.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP260559/2004 | 2004-09-08 | ||
| JP2004260559 | 2004-09-08 | ||
| JP213794/2005 | 2005-07-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746764A CN1746764A (en) | 2006-03-15 |
| CN100507705C true CN100507705C (en) | 2009-07-01 |
Family
ID=36166350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100983189A Expired - Fee Related CN100507705C (en) | 2004-09-08 | 2005-09-07 | Projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100507705C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007249063A (en) * | 2006-03-17 | 2007-09-27 | Sony Corp | Video display device and video signal processor |
| JP4475268B2 (en) * | 2006-10-27 | 2010-06-09 | セイコーエプソン株式会社 | Image display device, image display method, image display program, recording medium storing image display program, and electronic apparatus |
| JP5861324B2 (en) * | 2011-08-30 | 2016-02-16 | セイコーエプソン株式会社 | Projector and projector control method |
| CN106249519A (en) * | 2016-08-22 | 2016-12-21 | 深圳市华星光电技术有限公司 | A kind of projector |
| WO2019111627A1 (en) | 2017-12-04 | 2019-06-13 | ソニー株式会社 | Illuminating device and projector |
-
2005
- 2005-09-07 CN CNB2005100983189A patent/CN100507705C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1746764A (en) | 2006-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4353151B2 (en) | projector | |
| US10261405B2 (en) | Projection displays | |
| US7768688B2 (en) | Image display device, image display method, and image display program | |
| TWI238920B (en) | Lighting, and projection type display and driving method of the display | |
| US7604357B2 (en) | Adjusting light intensity | |
| US6857751B2 (en) | Adaptive illumination modulator | |
| JP4776785B2 (en) | Projection display | |
| CN101387819B (en) | Projection type image display apparatus | |
| CN100507705C (en) | Projector | |
| US20090201588A1 (en) | Illuminating device, illuminating method, image signal processing device, image signal processing method, and image projecting apparatus | |
| US7518802B2 (en) | Illumination device, image display device, and projector | |
| CN1875621B (en) | Rear projection-type multi-projection display | |
| CN102955336B (en) | Projection display device and control method thereof | |
| JP4186662B2 (en) | Illumination device and projection device | |
| JP2003186111A (en) | Illuminator, projector and driving method therefor | |
| JP4155113B2 (en) | Illumination device, projection display device, and driving method thereof | |
| JP4165309B2 (en) | Illumination device, projection display device | |
| WO2006055932A2 (en) | System and method for light source modulation | |
| JPH07318883A (en) | Liquid crystal projector | |
| KR100849433B1 (en) | Illuminator and projection display and its driving method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20200907 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |