CN1727988A - Illuminating device and projection type video display - Google Patents
Illuminating device and projection type video display Download PDFInfo
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- CN1727988A CN1727988A CN 200510088427 CN200510088427A CN1727988A CN 1727988 A CN1727988 A CN 1727988A CN 200510088427 CN200510088427 CN 200510088427 CN 200510088427 A CN200510088427 A CN 200510088427A CN 1727988 A CN1727988 A CN 1727988A
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Abstract
An illuminating device comprises a first light source in which LED chips are arranged in an array shape and a second light source in which LED chips are arranged in an array shape. The two light sources of each illuminating device are arranged such that the main light-emission optical axes of the light sources are perpendicular to each other. Moreover, a time-division switching mirror is provided at a crossing position between the main light-emission optical axes. The first light source and the second light source alternately emit pulses of light. The pulsed emission is a method of supplying a large amount of electric currents to the LED chips in a short time period, and a light-emitting amount increases compared to a steady-state emission of the LED chips. The time-division switching mirror becomes a transmitting state when the first light source is lighted, and becomes a reflecting state when the second light source is lighted.
Description
Technical field
The present invention relates to lighting device and projection display device.
Background technology
The lighting device that is used for liquid crystal projection apparatus etc. generally constitutes by the lamp of extra-high-pressure mercury vapour lamp, metal halide lamp, xenon lamp etc. and with the parallel photochemical paraboloid of its irradiates light.In addition, in this lighting device, for reduce the light quantity inequality of shadow surface, have utilize a pair of fly lens (fly eyelens) converge (integrate) function (function of the overlapping optically focused in a plurality of field of illuminations on lighting object of the regulation shape of utilizing optical devices planar to take a sample to form).And then, in recent years,, also attempting use light emitting diode (LED) as light source (opening flat 10-186507 number) with reference to the spy from the viewpoint of light-duty, miniaturization etc.
But, in fact but can't use light emitting diode to obtain practical lighting device.
Summary of the invention
The present invention is in view of above-mentioned truth, and purpose is to provide a kind of practical lighting device and projection display device that uses the solid-state light emitting element of light emitting diode etc.
Lighting device of the present invention to is characterized in that in order addressing the above problem, to possess: be made up of and towards a plurality of light sources of different directions configuration one or more solid-state light emitting elements; Make this solid-state light emitting element carry out the control gear of lighting of pulsed illumination; Emergent light during the pulse of a light source is lighted in generation lead the state of specific light path and the pulse of other light sources lighted in the lead light path change mechanism (below, in this, be called the 1st structure) of state of described specific light path of emergent light.
Because with flow through solid-state light emitting element and make its constant luminous comparing of steady current, transient flow also further increases the peak value light quantity of its pulsed illumination through big electric current, so the outgoing light quantity in the above-mentioned lighting device increases.And, from make certain solid-state light emitting element luminous till make it luminous next time during, other solid-state light emitting elements also can carry out pulsed illumination, light amount ratio makes that solid-state light emitting element is constant fully luminously also to be increased to some extent.Here, under all same directional situation of a plurality of light sources (optical axis of each light source all is parallel to each other), actual light-emitting area is greater than lighting object, and be imported into the collimation of the light beam of lighting object can be impaired easily.Relative therewith, if for the present invention, then make a plurality of light sources in different directions, also be provided with light path change mechanism, so the relative lighting object of actual light-emitting area reduces, and can improve the collimation that imports the light beam in the lighting object.In other words, can shorten distance from the lighting device to the lighting object.
In above-mentioned first structure, described light path changes mechanism and also can form by switching the switching mechanism that sees through/reflect that sees through and reflect.In addition, described see through/reflection switching mechanism also can be by seeing through and the switch diffraction element of reflection by controlling to switch with the synchronous energising of described pulsed illumination.And, in the lighting device of this structure, also can have three light sources, the described switch diffraction element of cross-over configuration on the crossover location of the emergent light of described three light sources.
In addition, in the lighting device that possesses described seeing through/reflection switching mechanism, described see through/reflection switching mechanism planar alternately has through zone and reflector space, also can be by switching the position that sees through zone and reflector space with the synchronous reciprocating action of described pulsed illumination.
Perhaps, in the lighting device that possesses described seeing through/reflection switching mechanism, described see through/reflection switching mechanism planar alternately has through zone and reflector space, also can be by switching the position that sees through zone and reflector space with the synchronous rotation of described pulsed illumination.
In above-mentioned first structure, described light path changes mechanism also can be by forming through light path change mechanism that the optical path direction that sees through is switched.In the lighting device of this structure, the described light path change mechanism that sees through also can be by forming by the switch diffraction element of controlling the light working direction that changes diffraction with the synchronous energising of described pulsed illumination.In addition, in the lighting device of this formation, also can have three light sources, and on the crossover location of the emergent light of described three light sources the described switch diffraction element of cross-over configuration.
In above-mentioned first structure, described light path changes mechanism and also can be made of the reflected light path change mechanism that change the light working direction that reflects.In the lighting device of this structure, described reflected light path change mechanism also can by by with the synchronous energising of described pulsed illumination control change catoptron towards reflector apparatus constitute.
In the lighting device of these structures, also can possess: first fly lens that is arranged on the light exit side of each light source; Be arranged on the described specific light path and paired, light assembled and second fly lens of guiding lighting object with each first fly lens.In addition, in this structure, also can possess the polarized light converting means at the light exit side of this second fly lens.
Perhaps, in the lighting device of these structures, also tubular or bar-shaped optical integrator can be set on described specific light path.
In the lighting device of these structures, the light that each light source also can the outgoing same color (below, in this, be called second structure).Perhaps, each light source also can the outgoing white light or is become each coloured light (below, become the 3rd structure in this) of white light.
In addition, projection display device of the present invention is characterised in that, constitute: it possesses a plurality of lighting devices of outgoing different colours light, in the described lighting device at least one is the lighting device of described second structure, each coloured light from each lighting device carries out optical modulation by display panel respectively, carries out projection after the synthetic light modulated of all kinds.
In addition, projection display device of the present invention is characterised in that, constitute: it possesses a plurality of lighting devices of outgoing different colours light, in the described lighting device at least one is the lighting device of described second structure, each coloured light from each lighting device is directed to equidirectional and carries out optical modulation by single display panel, and light modulated of all kinds is carried out projection.
And then projection display device of the present invention is characterised in that, constitutes: possess the lighting device of the 3rd structure, carry out optical modulation by single display panel from the white light of described lighting device, and this light modulated of projection.
In addition, projection display device of the present invention is characterised in that., constitute: possess the lighting device of the 3rd structure, will be separated into red light, green light and blue light from the white light that described lighting device sends, each coloured light carries out optical modulation by display panel respectively, carries out projection after light modulated of all kinds is synthesized.
In addition, in first structure, be characterised in that, possess: will be converted to first polarized light conversion device of the polarized light of first direction from the light of the first light source outgoing described a plurality of light sources; To be converted to the second polarized light device from the light of the secondary light source outgoing different with described first light source with the polarized light of the second direction of described first direction quadrature; Described light path change mechanism is by seeing through or any function of reflection will import the specific light path from described first light source outgoing and the light that becomes the polarized light of first direction, simultaneously, to import the described specific light path (below, in this, be called the 4th structure) from described secondary light source outgoing and the light that becomes the polarized light of second direction by other functions.
The 4th structure is the different structure of utilizing based on polarized light that sees through and reflect, because with make flow through solid-state light emitting element and make its constant luminous comparing of steady current, the transient flow super-high-current also increases the light quantity of its pulsed illumination to some extent, so the outgoing light quantity of the lighting device of the 4th structure increases.
In above-mentioned the 4th structure, also can make the outgoing light quantity of this first light source and this secondary light source different, so that the polarized light of the first direction that obtains through described light path change mechanism equates with the light quantity of the polarized light of second direction.
In above-mentioned the 4th structure and be subordinated in its structure, also can possess: first fly lens that is arranged on the light exit side of each light source; Be arranged on the described specific light path, paired with first fly lens respectively, light assembled and second fly lens of guiding lighting object.Perhaps, also can possess tubular or bar-shaped optical integrator (light integrator) on the described specific light path.
In above-mentioned the 4th structure and be subordinated in its structure, also can possess: switch by the on/off of energising and make the polarisation of light direction that receives revolve the switch polarized light rotating element of functional status that turn 90 degrees and the functional status that does not make its rotation, control the on-off circuit of this switch polarized light rotating element; Described switch polarized light rotating element is configured on the described specific light path, described some amount control gear is so that the mode that the pulsed illumination of first light source and secondary light source regularly staggers is lighted control, the pulsed illumination of described on-off circuit and described solid-state light emitting element regularly synchronously, and make described switch polarized light rotating element on/off, make through polarisation of light direction that described switch polarized light rotating element obtains unified (below, in this, be called the 5th structure).
In above-mentioned the 4th structure and be subordinated in its structure (except above-mentioned the 5th structure), light that also can each light source outgoing same color (below, in this, be called the 6th structure).In above-mentioned the 4th structure and be subordinated in its structure (except above-mentioned the 5th structure), also can each light source outgoing white or become each coloured light (below, in this, be called the 7th structure) of white.
In addition, projection display device of the present invention is characterised in that, constitute: a plurality of lighting devices that possess the light of outgoing different colours, in the described lighting device at least one is the lighting device of described the 6th structure, each coloured light from each lighting device carries out optical modulation by display panel respectively, and carries out projection after synthetic light modulated of all kinds.
In addition, projection display device of the present invention is characterised in that, constitute: a plurality of lighting devices that possess the light of outgoing different colours, in the described lighting device at least one is the lighting device of described the 6th structure, equidirectional and carry out optical modulation, this light modulated of projection by single display panel will lead respectively from each coloured light of each lighting device.
Moreover, projection display device of the present invention is characterised in that, constitute: possess the lighting device of described the 7th structure, by single display panel to carrying out optical modulation from the white light of described lighting device or each coloured light of becoming white, and this light modulated of projection.
And then, projection display device of the present invention is characterised in that, constitute: the lighting device that possesses described the 7th structure, to be separated into the light of different colours from the white light of described lighting device, by display panel each coloured light is carried out optical modulation respectively, and after synthetic light modulated of all kinds, carry out projection.
In the projection display device of the lighting device that possesses the 6th structure or the 7th structure, what also can possess as described display panel is the display panels with light incident side polaroid, possesses the panel drive circuit that drives described display panels simultaneously, describedly light control gear so that the mode that the pulsed illumination of first light source and secondary light source regularly staggers is lighted control, when described panel drive circuit is incided on the described display panels at the polarized light of described first direction, with the display panels of being used for that is generated, picture signal that the direction of polarized light of light incident side is intersected with respect to the polaroid of exiting side or generated be used for display panels, the direction of polarized light of light incident side offers described display panels with respect to any one party picture signal in the parallel picture signal of the polaroid of exiting side, on the other hand, when the polarized light of second direction is incided described display panels, other picture signal is offered described display panels.
In above-mentioned the 5th structure, the light that each light source also can the outgoing same color (below, in this, be called the 8th structure).In above-mentioned the 5th structure, each light source also can the outgoing white light or is become each coloured light (below, be called the 9th structure in this) of white.
In addition, projection display device of the present invention is characterised in that, constitute: a plurality of lighting devices that possess the light of outgoing different colours, in the described lighting device at least one is the lighting device of the 8th structure, each coloured light from each lighting device carries out optical modulation by display panel respectively, and carries out projection after synthetic light modulated of all kinds.
In addition, projection display device of the present invention is characterised in that, constitute: a plurality of lighting devices that possess the light of outgoing different colours, in the described lighting device at least one is the lighting device of the 8th structure, to lead respectively from each coloured light of each lighting device equidirectional and carry out optical modulation, thereby this light modulated of projection by single display panel.
Have, projection display device of the present invention is characterised in that, constitutes again: possess the lighting device of the 9th structure, modulate by single display panel from the white light of described lighting device or each coloured light of becoming white, and this light modulated of projection.
Also have, projection display device of the present invention is characterised in that, constitutes: possess the lighting device of the 9th structure, will be separated into the light of different colours from the white light of described lighting device, each coloured light carries out optical modulation by display panel respectively, and carries out projection after synthetic light modulated of all kinds.
In these projection display devices of the lighting device that possesses described the 8th structure or the 9th structure,, also can possess display panels as described display panel.
In addition, in the projection display device of the lighting device that possesses the 4th structure, the 5th structure, the 6th structure, the 7th structure, the 8th structure or the 9th structure, the level of picture signal that offers described display panel in the time of also can making the polarized light of the level of the picture signal that offers described display panel when receiving the polarized light of first direction and reception second direction is different.In addition, in these lighting devices or projection display device, it can be the polarization spectroscope of glass cubic build (glasscube type) that described light path changes mechanism.
As above illustrated, according to the present invention, because have a plurality of light sources of forming by one or more solid-state light emitting elements and make described solid-state light emitting element pulsed illumination, so can obtain fully than making the constant luminous also big light quantity of solid-state light emitting element.Can make actual light-emitting area less than lighting object, and can improve the depth of parallelism that imports the light beam in the lighting object.
Description of drawings
Fig. 1 is the key diagram of the projection display device of expression first embodiment.
Fig. 2 A is the key diagram of the lighting device that uses in the projection display device of presentation graphs 1; Fig. 2 B is the key diagram of the luminous control of indicating impulse.
Fig. 3 A is the key diagram of other projection display devices of expression first embodiment; Fig. 3 B is the key diagram of the cross-over configuration example of two timesharing catoptrons of expression.
Fig. 4 is the key diagram of other projection display devices of expression first embodiment.
Fig. 5 is the key diagram of other projection display devices of expression first embodiment.
Fig. 6 is the key diagram of other examples of the lighting device of expression first embodiment.
Fig. 7 A is the key diagram of other examples of the lighting device of expression first embodiment; Fig. 7 B is the key diagram of expression rotation segmented reflector mirror.
Fig. 8 A is the key diagram of other examples of the lighting device of expression first embodiment, is the pulse of the expression light source 12B key diagram when lighting; Fig. 8 B is the key diagram of the pulse of expression light source 12A when lighting.
Fig. 9 A is the key diagram of other examples of the lighting device of expression first embodiment; Fig. 9 B is the key diagram of expression reflector apparatus.
Figure 10 is the key diagram of other examples of the lighting device of expression first embodiment.
Figure 11 is the key diagram of other examples of the lighting device of expression first embodiment.
Figure 12 is the key diagram of the lighting device of expression second embodiment.
Figure 13 is the front view of the light source that uses in the lighting device of Figure 12.
Figure 14 is the light source that uses in the lighting device of Figure 12 and the side view of polarized light conversion device.
Figure 15 is the pulsed illumination key diagram regularly of two light sources in the lighting device of expression Figure 12.
Figure 16 is the key diagram of projection display device that the lighting device of Figure 12 has been used in expression.
Figure 17 is the key diagram that expression has the lighting device of π unit and utilizes the projection display device of this lighting device.
Figure 18 be two light sources in the lighting device of expression Figure 17 pulsed illumination regularly and the key diagram of the switching timing of π unit.
Figure 19 is the key diagram of projection display device that the lighting device of Figure 12 has been used in expression.
Figure 20 is the key diagram of the display panels of the common conventional white type of expression.
Figure 21 is the key diagram of projection display device that the lighting device of Figure 17 has been used in expression.
Figure 22 is the key diagram of other examples of the light source of expression second embodiment.
Embodiment
(embodiment 1)
Below, according to Fig. 1～Figure 11 the projection display device of first embodiment of the present invention is described.In addition, in any one example of first embodiment, the light of a plurality of light sources is all imported in the same optical path.But, can not use the different structure of utilizing light wavelength (for example utilize dichronic mirror etc. structure) or utilize the different structure (for example utilizing seeing through and S polarization reflection of light and the structure that it is synthetic of P polarized light) of polarized light.That is, realized to utilize the structure of the identical light of colour or polarized light as light source.
Fig. 1 is the optical system of expression three-plate type projection display device.This projection display device possesses three lighting device 1R, 1G, 1B (below, when not having each lighting device of specific expression, with symbol " 1 " expression).Lighting device 1R outgoing red light, lighting device 1G outgoing green light, lighting device 1B outgoing blue light.From the light of each lighting device 1 outgoing is imported display panels 3R, 3G, the 3B of usefulness of all kinds by collector lens 23,24 (below, when not having each display panels of specific expression, with symbol " 3 " expression).Each display panels 3 possesses the light incident side polaroid, encapsulated liquid crystals and the panel part, the exiting side polaroid that form between a pair of glass substrate (form pixel electrode and alignment films).By via display panels 3R, 3G, 3B and modulated light modulated (image light of all kinds) becomes full-colour image light by cross dichroic prism 4 after synthetic.This coloured image light is projected lens 5 enlarging projections and is presented on the screen.
Lighting device 1 possesses: the first light source 12A that led chip 11...... is configured to array-like and forms at the light exit side of each led chip 11 configuration lens unit 14......; The secondary light source 12B that led chip 11...... is configured to array-like and forms at the light exit side of each led chip 11 configuration lens unit 14...... (below, when not having specific each light source, with symbol " 12 " expression).It is mutually orthogonal that two light sources 12 of each lighting device 1 are configured to its outgoing primary optical axis.And, on this optical axis crossover location, be provided with timesharing switched mirror 21.The outgoing primary optical axis of time-division switched mirror 21 and two light sources 12 all tilt 45 the degree.
In addition, each lighting device 1 all possesses: will compile from each led chip 11 outgoing and by the light of described lens unit 14 parallelizations and the display panels 3 that leads integration lens 13.The first fly lens 13a of integration lens 13 is configured in the light exit side of each light source 12 respectively.And the second fly lens 13b in the integration lens 13 is configured in the rear side (light exit side) of timesharing switched mirror 21.Each lens among the fly lens 13a13b are to all will be from the photoconduction of each led chip 11 outgoing to whole liquid crystal display panel 3.Led chip 11...... is formed by the transparent resin moldings formed therefrom, constitutes described lens unit 14...... by making this transparent resin form convex.Though led chip 11 and lens unit 14 can be circle, adopt in the present embodiment square, and then with the profile of display panels 3 than consistent.
In addition, on the light exit side of fly lens 13b, be provided with polarized light conversion device 22.This polarized light conversion device 22 is by polarizing beam splitter array (hereinafter referred to as the PBS array).The PBS array possesses polarized light separation membrane and polarizer (1/2 λ plate).Each polarized light separation membrane of PBS array make from the light of light collecting lens 13, for example P polarized light passes through, and makes the S polarized light carry out 90 degree light paths changes.The S polarisation that has carried out the light path change is by adjacent polarized light separation membrane reflection, and the described polarizer that is set at its place ahead (light exit side) penetrates after being converted to the P polarized light.On the other hand, the P polarized light that sees through polarized light separation membrane is directly penetrated.That is, in this case, nearly all light all is converted into the P polarized light.In above-mentioned example, though the structure that all light all is converted to the P polarized light is illustrated,, also can all be converted to the structure of S polarized light by on P polarized light outgoing position, polarizer being set.
As described timesharing switched mirror 21, for example can utilize structure as the DigiLens (registered trademark) of switch diffraction element (special table 2002-520648 communique (and with particular reference to instructions " 0008 ", " 0009 " section) and special table 2002-525646 communique).In addition, if the switch diffraction element for for example the P polarized light is the most suitable, then as shown in figure 10, is preferably in the stage of inciding before the timesharing switched mirror 21 light is converged the polarized light into P.In the example of this Figure 10, in each light source 12, all be provided with the second fly lens 13b and polarized light conversion device 22.Figure 11 has represented that also the stage before inciding timesharing switched mirror 21 converges structure example into the P polarized light with light, and this be will be explained below.
Not shown light source igniting control part all makes the first light source 12A and secondary light source 12B ALT pulse luminous in each lighting device 1.Fig. 2 A has represented: in the lighting device 1B of blueness usefulness, extinguish the first light source 12A, light the state of secondary light source 12B.Pulsed illumination is that led chip 11 is carried out the method that the big electric current in the short time drops into, and luminous quantity is also increased to some extent than the constant luminous of led chip 11.And, beginning to pulsed illumination next time from pulsed illumination, the interval of regulation (interval) is necessary.Shown in Fig. 2 B,, make the first light source 12A and secondary light source 12B ALT pulse luminous in order to fill this interval.And described timesharing switched mirror 21 becomes through state when lighting the first light source 12A, becomes reflective condition when lighting secondary light source 12B, and by not shown drive division energising.Though in Fig. 2 A, represented the lighting device 1B of blue usefulness,, in the lighting device that other colors are used, the ALT pulse that also can carry out two light sources 12 is luminous.
As described above, because make led chip 11 pulsed illumination successively, so fully can be than making the constant luminous light quantity that also increases of a plurality of solid-state light emitting elements.In addition, because make a plurality of light sources 12 in the time of different directions, be provided with timesharing switched mirror 21 (light path change mechanism),, and can improve the depth of parallelism of the light beam of guiding lighting object so actual light-emitting area is less than lighting object.In other words, can shorten the distance between the collector lens 23,24 and make the projection display device compactness.In addition, can utilize the identical parts of color or polarized light as light source.
In addition, in above-mentioned example, though each light source 12 all is made up of a plurality of LED, be not limited thereto, light source 12 also can be made of a LED.In the light source 12 that in following illustrational lighting device 1, uses too.
Fig. 3 A has represented the configuration example that each lighting device 1 all is made up of three light sources 12 (wave band of the light of three light source outgoing of each lighting device is roughly the same).That is, each lighting device 1 has: when the first light source 12A, secondary light source 12B and the 3rd light source 12C are configured to slightly be " コ " font, with the structure of two timesharing switched mirror 21A21B cross-over configuration.In this structure, make the first light source 12A, secondary light source 12B and the 3rd light source 12C pulsed illumination successively.And when lighting the first light source 12A, two timesharing switched mirror 21A21B become jointly through state; When lighting secondary light source 12B, timesharing switched mirror 21A becomes reflective condition, and timesharing switched mirror 21B becomes through state; When lighting the 3rd light source 12C, timesharing switched mirror 21A becomes that timesharing switched mirror 21B becomes reflective condition through state.
Fig. 3 B represents the cross-over configuration example of two timesharing switched mirror 21A21B.The timesharing switched mirror 21A21B of cross-over configuration forms (4 altogether: 211A, 211A, 211B, 211B) by two catoptrons respectively.These four timesharing switched mirror have the structure near each corner and cross-over configuration respectively.Certainly, also be not limited to this structure.That is, the side among two timesharing switched mirror 21A21B is a formation, and the opposing party is two formations, to realize cross-over configuration.
Fig. 4 represents the projection display device of one-board.Lighting device 1W has: when the first light source 12A, secondary light source 12B and the 3rd light source 12C are configured to slightly be " コ " font, with the structure of two timesharing switched mirror 21A21B cross-over configuration.Three light sources 12 are the outgoing white light all.All led chips that also can each light source 12 are the outgoing white light all, perhaps also can make the led chip 11 of outgoing red light, the led chip 11 of outgoing green light and the led chip 11 of outgoing blue light mix the outgoing white lights.The first light source 12A, secondary light source 12B and the 3rd light source 12C be pulsed illumination successively.And when lighting the first light source 12A, two timesharing switched mirror 21A21B become jointly through state; When lighting secondary light source 12B, timesharing switched mirror 21A becomes reflective condition and timesharing switched mirror 21B becomes through state; When lighting the 3rd light source 12C, timesharing switched mirror 21A becomes that timesharing switched mirror 21B becomes reflective condition through state.Incide the permeation type liquid crystal display panel 3F that possesses the RGB colored filter from the white light of lighting device 1W outgoing, and carry out optical modulation.
In addition, also can possess lighting device 1R, lighting device 1G and lighting device 1B, by guiding single directions such as dichronic mirrors, carry out optical modulation by single display panel from each coloured light of each lighting device 1.In this case, also can light lighting device 1R, lighting device 1G and lighting device 1B successively, and on described single display panel, show red successively with image, green with image and blueness image.
Fig. 5 has represented to use the projection display device of three reflection-type display elements.The projection display device of this structure also possesses lighting device 1W.Be imported into inner full-reflection (the total internal reflection:TIR) prism 30 through lens 23 from the white light of lighting device 1W outgoing.Being imported into the color of being made up of three prisms by the white light of these inner full-reflection prism 30 reflections decomposes in the synthetic prisms 31.And each coloured light is imported into DMD (digital microlens device) 9R, 9G, the 9B of usefulness of all kinds, and these reflected light (image light of all kinds) incide color once more and decompose in the synthetic lens 31, become full-colour image light after, decompose the synthetic prisms 31 from color and to penetrate.Decompose the full-colour image light transmission inner full-reflection prism 30 that synthetic prisms 31 penetrates from color, and be projected lens 5 enlarging projections.
Fig. 6 has represented another structure example (the lighting device 1B that has represented the outgoing blue light here, for example) of lighting device 1.In this structure example, be provided with reciprocal driving catoptron 41 and replace timesharing switched mirror 21.Back and forth driving catoptron 41 is designed to: planar alternately form bar shaped with reflector space with through the zone, and reciprocatingly slide according to the direction of arrow of figure.Described reflector space and see through the zone for example with the corresponding formation of columns of the led chip 11 that constitutes light source 12.All led chips 11 that pulse in each light source 12 is lighted not each light source 12 carry out, but carry out with the unit of classifying as.In the present embodiment, every row carry out pulse and light.Pulsed illumination row in two light sources 12 are set at complementary relationship, for example, under the state that the led chip 11 of the top in the figure of light source 12A extinguishes, light the led chip 11 of the leftmost side among the figure of the light source 12B complementary with it.And, in this state, the outgoing zone that back and forth drives catoptron 41 is arranged on the optical axis of led chip 11 of figure the top of light source 12A (on the optical axis of the led chip 11 of the figure leftmost side of optical axis 12B), and the emergent light of the led chip 11 of the leftmost side is imported among the fly lens 13b among the figure of light source 12B.That is, in light source 12A, in the time of on back and forth driving the optical axis that is positioned at led chip 11 through the zone of catoptron 41, these led chip 11 pulses are lighted, and another led chip 11 becomes and extinguishes state.On the other hand, in light source 12B, when back and forth the reflector space of driving catoptron 41 was positioned on the optical axis of led chip 11, these led chip 11 pulses were lighted, and 11 of another led chips become and extinguish state.
In addition, in the structure of Fig. 6, drive back and forth driving catoptron 41 along the direction of arrow, but be not limited to this.For example, also can drive back and forth driving catoptron 41 along the paper vertical direction of Fig. 6.In this case, also can carry out pulse to each light source 12 with behavior unit lights.In addition, back and forth drive the reflector space of catoptron 41 and see through the zone and preferably also form corresponding to described row.
In addition, state in the use in the structure of timesharing catoptron in (with reference to figure 1 etc.), this timesharing catoptron is with reflector space and see through the zone and switch to bar shaped, and can light with the pulse that the row or the unit of classifying as carry out each light source 12.
Fig. 7 represents other configuration example (the lighting device 1B that represents the outgoing blue light here for example) of lighting device 1.In this structure, rotation segmented reflector mirror 42 is set replaces timesharing switched mirror 21.Rotation segmented reflector mirror 42 makes the circular slab face be positioned at the crossover location of the emergent light of light source 12A and light source 12B, and is provided with rotation center on the position away from described crossover location.Shown in Fig. 7 B, this circular slab face is by reflector space (indicating oblique line in the drawings) and see through four worthwhile mutually regional formation of zone.The rotation of rotation segmented reflector mirror 42 and the pulsed illumination of light source 12 are synchronous.Specifically, carry out synchronous Spin Control, so that when light source 12 pulsed illumination, see through the zone and be positioned at described crossover location, when light source 12B pulsed illumination, reflector space is positioned at described crossover location.
Fig. 8 represents another configuration example (the lighting device 1B that represents the outgoing blue light here for example) of lighting device 1.In this structure, switch diffraction element 43 (for example, being made up of described DigiLens (registered trademark)) is set replaces timesharing switched mirror 21.Switch diffraction element 43 is by controlling the light working direction that changes diffraction with the synchronous energising of the pulsed illumination of light source 12.Promptly, when led chip 11 pulsed illumination of light source 12B, shown in Fig. 8 A, switch diffraction element 43 is with optical diffraction and import the second fly lens 13b, when led chip 11 pulsed illumination of light source 12A, shown in Fig. 8 B, switch diffraction element 43 directly advances light and imports to the second fly lens 13b.
In structure shown in Figure 8,, also can adopt three light sources to be set and the structure of the described switch diffraction element 43 of cross-over configuration on the crossover location of the emergent light of these three light sources though be provided with two light source 12A and light source 12B.In addition, if switch diffraction element 43 for example is fit to the P polarisation, then be preferably in the stage of inciding before the switch diffraction element 43 light is converged to be P polarisation (with reference to Figure 10).
Fig. 9 A represents another configuration example (the lighting device 1W that represents the outgoing white light here for example) of lighting device 1.In this structure example, lighting device 1 possesses two light source 12A and 12B, and these two light sources of cross-over configuration are so that its emergent light axis forms the angle of 45 degree.Each light source 12 has designed one or more White LED chip.In the present embodiment, above-mentioned led chip has photon crystal structure, and the light exit direction is approximately perpendicular to light-emitting area, the directive property height.And, constituting at led chip under the situation of light source 12 by a plurality of photonic crystal type, the interval of led chip is very narrow.In addition, photonic crystal is meant the artificial lens that specific inductive capacity is periodically modulated.
On the optical axis crossover location of two light sources 12, be provided with microscopie unit 45.This microscopie unit is configured to: form miter angle with the optical axis of light source 12B, and form an angle of 90 degrees with the optical axis of light source 12A.Above-mentioned microscopie unit 45 is made up of a plurality of micro-catoptrons, when energising disconnects, and shown in Fig. 9 B, the optical axis (representing with solid line in the drawings) of each micro-catoptron and light source 12B inclination 45 degree (heavy line in the reference diagram).On the other hand, when energising was connected, micro-catoptron is counterclockwise inclination 22.5 degree (thick dashed line in the reference diagram) in Fig. 9 B.And the power supply of microscopie unit 45 disconnects to be carried out when light source 12B pulsed illumination, carries out when energising turns on light source 12A pulsed illumination.Thus, the emergent light of two light sources 12 all is imported in the specific light path (same optical path).In addition, preferably make the brightness (brightness that above-mentioned microscopie unit 45 reflects light beam afterwards) of light source 12A identical in advance with the brightness of light source 12B (brightness of above-mentioned microscopie unit 45 reflections light beam afterwards).
On above-mentioned specific light path, be provided with the bar-shaped integrator 51 (preferably inner face is the hollow part of minute surface) that forms by glass column.By making light in these bar-shaped integrator 51 internal reflections and pass through, thereby in the depth of parallelism that improves light beam, obtain the average area source of brightness.
In addition, in the structure of above-mentioned Fig. 9,, be not limited thereto though light source 12A and light source 12B form miter angle and be configured.If reduce above-mentioned angle (if making light source 12A and light source 12B approach configured in parallel), the pivot angle (anglec of rotation) in the time of then can reducing the on/off of each micro-catoptron of microscopie unit 45.
The lighting device 1W of above-mentioned Fig. 9 can use in Fig. 4 and projection display device shown in Figure 5.Certainly, in structure shown in Figure 9, also can constitute lighting device 1R, the lighting device 1G of outgoing green light, the lighting device 1B of outgoing blue light of outgoing red light.And, also can constitute the projection display device (with reference to figure 1 etc.) that possesses these three lighting device 1R, 1G, 1B.
In addition, digital microlens device (DMD) is though drive each micro-catoptron individually in order to carry out image to show, in above-mentioned microlens device 45, preferably integral body drives all micro-catoptrons.In addition, above-mentioned microscopie unit 45 preferably has the structure by each micro-catoptrons of driving such as piezoelectric elements.
Be preferably in the integration lens that the light exit side setting of bar-shaped integrator shown in Figure 9 51 is made up of a pair of fly lens.Like this, being provided with under the situation of this integration lens, polarized light conversion device is set preferably.In addition, preferably direct light exit side at above-mentioned bar-shaped integrator 51 is provided with polarized light conversion device.Polarized light conversion device is in this case preferably formed (with reference to the polarized light conversion device 22A of Figure 11 described later) by two polarized light beam splitters (PBS), the polarizer (1/2 λ plate) that is configured in the light exit side of one of them polarized light beam splitter.The size of the light entrance face in polarized light beam splitter is big or small consistent with the light-emitting face of bar-shaped integrator 51.In addition, preferably make above-mentioned polarized light conversion device whole light-emitting face profile than with the profile of image display panel than consistent.With the structure-irrelevant of Fig. 9, the profile that preferably makes each led chip, light source, lighting device, bar-shaped integrator, integration lens than with the profile of image display panel than consistent.In addition, solid-state light emitting element is not limited to LED.
Though former statement of lighting device 1B shown in Figure 10,, in light source 12, also have the structure of the direction of polarized light of converging.
(embodiment 2)
Below, according to Figure 12～Figure 22 the lighting device and the projection display device of second embodiment of the present invention are described.
Figure 12 is the key diagram of expression lighting device 100A.Dispose on first light entrance face of polarized light synthin (light path change mechanism) 101 first light source 102 (below, also underlined is the situation of symbol 102A) and first polarized light conversion device 103 (below, also underlined is the situation of symbol 103A), dispose on second light entrance face secondary light source 102 (below, also underlined is the situation of symbol 102B) and second polarized light conversion device 103 (below, also underlined is the situation of symbol 103B).First light entrance face and second light entrance face intersect with 90 degree.In addition, each outgoing primary optical axis of synthetic relative two light sources 102 of film (polarized light separation membrane) of the polarized light of above-mentioned polarized light synthin 101 is 45 degree inclinations.And, on the light-emitting face (this light-emitting face is relative with this first light entrance face) of above-mentioned polarized light synthin 101, dispose bar-shaped integrator 104.Can utilize so-called wire grid polarizer as polarized light synthin 101, in the present embodiment, utilize the polarized light beam splitter of glass cubic build, if the polarized light beam splitter of this glass cubic build, then can expect to utilize the total reflection of the synthetic film of polarized light, and can shorten bar-shaped integrator 104.Above-mentioned bar-shaped integrator 104 also can come bonding by transparent adhesive (having the identical or different refractive index of refractive index with the glass that constitutes bar-shaped integrator 104 and polarized light synthin 101 etc.).In addition, the light-emitting face at least of bar-shaped integrator 104 forms square, and then the profile of this square light-emitting face is than general consistent with the profile ratio of image-displaying member.
As shown in figure 14, polarized light conversion device 103 is made of polarized light beam splitter array (hereinafter referred to as the PBS array).Polarized light separation membrane in this PBS array makes in the light that light source 102 sends, for example P polarized light sees through, and the S polarized light is carried out 90 degree light paths changes.The S polarized light that has carried out the light path change is directly penetrated then by adjacent polarized light separation membrane (perhaps reflectance coating) reflection.On the other hand, the P polarized light that has seen through polarized light separation membrane polarizer (the 1/2 λ plate) 103a that is set at its place ahead (light outgoing side) penetrates after being converted to the S polarized light.That is, in this case, nearly all light all is converted into the S polarized light.In addition, polarized light beam splitter is made of so-called wire grid polarizer and polarized light separate multiple layer film etc.
Wherein, first polarized light conversion device is set, provides by the first light source 102A so that will become the light of P polarized light for the synthetic film (polarized light separation membrane) of the polarized light in the above-mentioned polarized light synthin 101.Equally, the second polarized light conversion device 103B is set, so that the light that becomes the S polarized light for the synthetic film (polarized light separation membrane) of above-mentioned polarized light is provided by secondary light source 102B.
In not shown LED starting controlling circuit, make the first light source 102A among the above-mentioned lighting device 100A and the secondary light source 102B pulsed illumination that hockets.Figure 15 is illustrated among the lighting device 100A, lights/extinguish state among the first light source 102A and the secondary light source 12B.Pulsed illumination is the method for above-mentioned led chip being carried out the big electric current input of short time, and the peak value luminous quantity also increases to some extent than the constant luminous of led chip.And, till pulsed illumination next time, need to begin the interval of stipulating from pulsed illumination.In order to fill this interval, make the first light source 12A and secondary light source 12B replace (phase deviation 180 degree) and carry out pulsed illumination.
The cycle of the pulsed illumination in the light source 102 is made as 120Hz.Therefore, (during lighting) is approximately 8.3msec during the pulsed illumination in the light source 102.In addition, as shown in figure 15, preferably make during the pulsed illumination among the first light source 102A and the secondary light source 12B overlapped slightly.Thus, can prevent that the moment light quantity that pulsed illumination causes from reducing (generation of the non-luminance in during the pulsed illumination).In the first above-mentioned embodiment too.In addition, direction of polarized light for the emergent light that makes the first light source 102A and secondary light source 102B differs 90 degree aspects, the frequency of lighting/extinguishing (120Hz) that is provided with among position, the first light source 102A and the secondary light source 102B of polarizer 103a in the polarized light conversion device 103 is an illustration, is not limited to foregoing.Even in following configuration example too.
Figure 16 is the key diagram that the projection display device of lighting device 100A has been used in expression.This projection display device uses the display element of 3 reflection-types.The white light scioptics 23 that penetrate from lighting device 100A are imported into inner full-reflection, and (total internal reflection, TIR) prism 30.Being imported into the color of being made up of three prisms by the white light of these inner full-reflection prism 30 reflections decomposes in the synthetic prisms 31.And, each coloured light is imported among DMD (digital microlensdevice) 9R, 9G, the 9B of usefulness of all kinds, these reflected light (image light of all kinds) incide color once more and decompose in the synthetic prisms 31, become full-colour image light and decompose synthetic prisms 31 ejaculations from color afterwards.Decompose the full-colour image light transmission inner full-reflection prism 30 that synthetic prisms 31 penetrates from color, and be projected lens 5 enlarging projections.
But the light amount ratio that sees through the P polarized light of the synthetic film (polarized light separation membrane) of polarized light in this polarized light synthin 101 is also reduced to some extent by the S polarized light that the synthetic film (polarized light separation membrane) of above-mentioned polarized light reflects.The generation of this light quantity difference is not supposed to.Therefore, preferably for example offer the electric power of secondary light source 102B, and the P polarized light that imports in the bar-shaped integrator 104 and the light quantity of S polarized light are equated by adjusting.Perhaps, also can adopt two different light source 102A102B of outgoing light quantity under the same power are being provided.Perhaps, also can carry out revisal, so that the luminance signal of the picture signal that is provided increases than the luminance signal of the picture signal that is provided when lighting secondary light source 102B when lighting the first light source 102A.That is it is poor, preferably to handle the light quantity of eliminating P polarized light and S polarized light by picture signal.These are handled and preferably also are applicable to following configuration example.
Figure 17 is the key diagram that the projection display device of lighting device 100B has been used in expression.Lighting device 100B has the structure of additional π unit (switch polarized light rotating element) 105 on above-mentioned lighting device 100A.Above-mentioned π unit 105 is configured in the light exit side of bar-shaped integrator 104.This π unit 105 for example have with display panels in taken out polaroid the suitable structure of structure, and switch functional status that the polarisation of light light direction that receives is revolved turn 90 degrees and the functional device that not have to rotate by the energising on/off.For example, be under the state that pulse lights (the P polarized light is through bar-shaped integrator 104 and offer the state of π unit 105) at the first light source 102A, π unit switch circuit 121 does not apply voltage (energising disconnects) to π unit 105.At this moment, π unit 105 is converted to the S polarized light with the P polarized light that receives.On the other hand, be under the state that pulse lights (the S polarized light is through bar-shaped integrator 104 and offer the state of π unit 105), π unit 105 is applied voltage (energising is connected) at secondary light source 102B.At this moment, π unit 105 directly sees through the S polarized light that receives.That is, unified to be any one party (being the S polarized light) by π unit 105 under above-mentioned situation from the P polarized light of the first light source 102A with from the S polarized light of secondary light source 102B.
Display panels 3F is the permeation type liquid crystal display panel that possesses colored filter.The light incident side polaroid of display panels 3F sees through the S polarized light.Display panels 3F is driven by lcd driver 122.In addition, the first light source 102A and secondary light source 102B spend the back by pulsed drive by LED lighting circuit 123 mutual dislocation 180.And, these lcd drivers 122, LED lighting circuit 123,124 controls of π unit switch circuit 121 Be Controlled circuit.As shown in figure 18, the on/off edge (toggle edges) of π unit 105 is positioned at the central authorities of lap during the pulsed illumination of light source 102.That is, in order to carry out this control, control circuit 124 control π unit switch circuit 121 and LED lighting circuits 123.Thus, if the on/off edge of π unit 105 is positioned at the central authorities of lap during the pulsed illumination of light source 102, then can prevent in the anti-phase way of π unit 105 during the reduction of light quantity.In addition, as switch polarized light rotating element,, be not limited thereto though show π unit 105.In addition, though represented for example to make from the P polarized light of the first light source 102A with from the S polarized light of secondary light source 102B and unified to be any one party (being the S polarized light in these cases), but be not limited to unify to be either party, also can make from the light of the first light source 102A with from the polarisation of light light direction of secondary light source 102B and unify.For example, light outgoing incident polarization light direction at display panels is under the situation of 45 degree, do not adopt unified structure for any one party in above-mentioned S polarized light or the P polarized light, for example, between π unit 105 and polarized light synthin 101, dispose half-wave plate, be light corresponding to above-mentioned 45 direction of polarized light of spending with unification.
Figure 19 is the key diagram that the projection display device of lighting device 100A has been used in expression.This projection display device has display panels 3F '.
The structure of having represented the display panels 3X of common standard white colour pattern among Figure 20.Light incident side polaroid 3Xa and the exiting side polaroid 3Xb of this display panels 3X are configured to: its light transmission direction of principal axis differs 90 degree.The energising relative with the pixel of this display panels 3X is when disconnecting, because the polarization of incident light light direction revolves and turn 90 degrees and incident light penetrates from exiting side polaroid 3Xb, so be shown as white demonstration.On the contrary, when the energising relative with this pixel is connection,,, be shown as black the demonstration so incident light can not see through exiting side polaroid 3Xb because do not produce the rotation of polarization of incident light light.
The structure of having taken out the light incident side polaroid among the structure of above-mentioned display panels 3F ' and this display panels 3X is suitable.And, lcd driver 122 according to the switching (switching of P polarized light and S polarized light) of the pulsed illumination of the first light source 102A and secondary light source 102B regularly switches that the picture signal that display panels 3F ' is considered as the conventional white type provides and the picture signal that display panels 3F ' is considered as conventional black type is provided.Promptly, when lcd driver 122 is shot in among the display panels 3F ' at the polarized light of first direction, with the display panels of being used for that is generated, picture signal that the direction of polarized light of light incident side is intersected with respect to the polaroid of exiting side or generated be used for display panels, the direction of polarized light of light incident side offers display panels 3F ' with respect to any one party in the parallel picture signal of the polaroid of exiting side, on the other hand, when the polarized light of second direction is incided among the display panels 3F ', the opposing party's picture signal is offered above-mentioned display panels.
Below, carry out more specific description.In addition, in the following description, the exiting side polaroid of establishing display panels 3F ' sees through the S polarized light.In first timing that light source 102A lights, the P polarized light is penetrated, the picture signal that lcd driver 122 is used conventional white offers display panels 3F '.When will the picture signal suitable with white offering display panels 3F ' (, when the relative energising of the pixel of display panels 3F ' is disconnection), because the P polarized light that incides among the display panels 3F ' becomes the S polarized light by revolving in its polarization direction to turn 90 degrees, so can see through described exiting side polaroid, show that becoming white shows.On the other hand, in the timing that secondary light source 102B lights, the S polarized light is penetrated, the picture signal that lcd driver 122 is used conventional black offers display panels 3F '.When display panels 3F ' supplies with the picture signal that is equivalent to white (when the relative energising of the pixel of display panels 3F ' is connection), because inciding the rotation of the S polarized light of display panels 3F ' can not produce, so can see through above-mentioned exiting side polaroid, showing becomes white demonstration.
Promptly, if projection display device shown in Figure 19, then by lcd driver 122 and cooperate alternately lighting of light source 102 regularly to switch the picture signal that conventional white uses to provide the picture signal of using with conventional black to provide, because these two picture signals are alternately offered display panels 3F ' (not having the light incident side polaroid), so do not use π unit 105 just can realize that image shows.
Figure 21 is the key diagram of expression 3 board-like projection display devices.This projection display device possesses three lighting device 100C.An outgoing red light among these three lighting device 100C, another outgoing green light, surplus next outgoing blue light.That is, as each light source, lighting device 100C also possesses the light source (led chip) of each coloured light of outgoing in the structure of lighting device 100B.From each coloured light process π unit 105 of each lighting device 100C ejaculation and by display panels 3R, 3G, the 3B of leading respectively.By via display panels 3R, 3G, 3B and full-colour image light is synthesized, become to modulated light modulated (image light of all kinds) by chiasma type colour splitting prism 4.This full-colour image light is projected lens 5 enlarging projections, and is presented on the screen.
In addition, in the structure of the three-plate type of Figure 21, can adopt the combination (with reference to Figure 19) with display panels and lighting device 100A of all kinds with light incident side polaroid.
In addition, also can adopt and to be divided into each coloured light from the white light that lighting device 100A or lighting device 100B penetrate by dichronic mirror, and each coloured light is imported structure in the display panels that each coloured light uses respectively.Synthetic and become full-colour image light by the light modulated (of all kinds image light) modulated by cross-dichroic mirror via above-mentioned display panels.This full-colour image light is projected the lens enlarging projection, and is presented on the screen.
And then, make the direct outgoing of S polarized light and make under the situation of lighting device 100A of the direct outgoing of P polarized light in use, the first light source 102A and secondary light source 102B are alternately lighted.For example, can in each light source, prepare two groups of combinations that are used for the led chip of outgoing white light in advance.When one group of led chip pulse is lighted, one group of led chip pulse is lighted.And, another group led chip pulse is lighted in, another group led chip pulse is lighted.In this case, though the light quantity difference of P polarized light and S polarized light still exist because the P polarized light and the S polarized light of outgoing simultaneously are synthesized, so can prevent to change from the light quantity that lighting device 100A penetrates.This structure (control) also is suitable for when constituting the lighting device of each coloured light of outgoing.
In addition, also can constitute the timesharing panchromatic projection display device that has utilized a DMD and lighting device 100A.For example, when the red light that makes the first light source 102A and secondary light source 102B is lighted with the led chip pulse, the picture signal of redness usefulness is offered above-mentioned DMD, when the green light that makes the first light source 102A and secondary light source 102B is lighted with the led chip pulse, the picture signal of green usefulness is offered above-mentioned DMD, when the blue light that makes the first light source 102A and secondary light source 102B is lighted with the led chip pulse, the picture signal of blueness usefulness is offered above-mentioned DMD.That is, can light with the pulse of the led chip of usefulness of all kinds and regularly carry out the timesharing that image shows pulse synchronously and drive.
Have again, also can constitute the timesharing panchromatic projection display device that has utilized a display panels and lighting device 100B.For example, offer in picture signal under the state of a described display panels redness usefulness, the redness of the first light source 102A is lighted (at this moment with the led chip pulse, π unit 105 is for example for disconnecting), and then make the redness of secondary light source 102B light (at this moment, π unit 105 is for example for connecting) with the led chip pulse.Next, offer in picture signal under the state of a described display panels green usefulness, the green of the first light source 102A is lighted (at this moment with the led chip pulse, π unit 105 is for example for disconnecting), and then make the green of secondary light source 102B light (at this moment, π unit 105 is for example for connecting) with the led chip pulse.Then, offer in picture signal under the state of a described display panels blueness usefulness, the blueness of the first light source 102A is lighted (at this moment with the led chip pulse, π unit 105 is for example for disconnecting), and then make the blueness of secondary light source 102B light (at this moment, π unit 105 is for example for connecting) with the led chip pulse.That is, when the picture signal with usefulness of all kinds offers display panels, in two light sources, light the led chip of the color corresponding successively, light the switch that regularly carries out π unit 105 accordingly with this with this color.In this case, can under high-frequency, carry out switch as polarized light synthin (π unit).
In addition, in the light source 102 that in the lighting device of above explanation, uses, as shown in figure 22, also can possess the bar-shaped integrator 108 (light-emitting face is greater than light entrance face) of taper.The shape of the light entrance face of this bar-shaped integrator 108 is almost consistent with the shape and the size of the light-emitting face of light source 102 with size, and the shape and the size of the light entrance face in the shape of light-emitting face and size and the polarized light conversion device 103 are unanimous on the whole.
In addition, also can possess the integration lens that first fly lens and second fly lens form and replace bar-shaped integrator 104.Described first fly lens is configured in the light exit side of polarized light conversion device 103 respectively.And described second fly lens is configured in the light exit side of polarized light synthin 101.In addition, described second fly lens in a plurality of light sources by general.Each lens in first fly lens and second fly lens to the photoconduction that all will penetrate from each light source to whole of image-displaying member.
Claims (43)
1. lighting device is characterized in that possessing:
Form by one or more solid-state light emitting elements, and towards a plurality of light sources of different directions configuration;
Make the control gear of lighting of described solid-state light emitting element pulsed illumination; With
Light path change mechanism, the lead state of described specific light path of the state of specific light path, the emergent light during the pulse in the other light sources lighted that leads of the emergent light during it generates the pulse in the light source lighted.
2. lighting device according to claim 1 is characterized in that, described light path changes mechanism and forms by switching the switching mechanism that sees through/reflect that sees through and reflect.
3. lighting device according to claim 2 is characterized in that, described see through/reflection switching mechanism sees through and the switch diffraction element of reflection constitutes by controlling to switch with the synchronous energising of described pulsed illumination.
4. lighting device according to claim 3 is characterized in that, this lighting device has three light sources, and on the luminous crossover location of described three light sources the described switch diffraction element of cross-over configuration.
5. lighting device according to claim 2, it is characterized in that, described see through/reflection switching mechanism constitutes: planar alternately has through zone and reflector space, and by switching the position that sees through zone and reflector space with the synchronous reciprocating action of described pulsed illumination.
6. lighting device according to claim 2, it is characterized in that, described see through/reflection switching mechanism constitutes: planar alternately has through zone and reflector space, and by switching the position that sees through zone and reflector space with the synchronous rotation of described pulsed illumination.
7. lighting device according to claim 1 is characterized in that, described light path change mechanism is made up of the light path change mechanism that sees through of the optical path direction that switching sees through.
8. lighting device according to claim 7 is characterized in that, the described light path change mechanism that sees through is made up of the switch diffraction element of controlling the light working direction that changes diffraction with the synchronous energising of described pulsed illumination.
9. lighting device according to claim 8 is characterized in that, this lighting device has three light sources, and on the crossover location of the emergent light of described three light sources the described switch diffraction element of cross-over configuration.
10. lighting device according to claim 1 is characterized in that, described light path changes mechanism and is made of the reflected light path change mechanism that changes the light working direction that reflects.
11. lighting device according to claim 10 is characterized in that, described reflected light path change mechanism by with the synchronous energising of described pulsed illumination control change catoptron towards reflector apparatus constitute.
12. lighting device according to claim 1 is characterized in that, possesses:
Be arranged on first fly lens of the light exit side of each light source;
Be arranged on the described specific light path, and paired with each first fly lens, with second fly lens of light gathering and guiding lighting object.
13. lighting device according to claim 12 is characterized in that, possesses the polarized light converting means at the light exit side of described second fly lens.
14. lighting device according to claim 1 is characterized in that, tubular or bar-shaped optical integrator are set on described specific light path.
15. lighting device according to claim 1 is characterized in that, each light source sends the light of same color.
16. lighting device according to claim 1 is characterized in that, each light source outgoing white light.
17. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess outgoing different colours light,
In the described lighting device at least one is the lighting device of record in the claim 15,
By display panel each coloured light from each lighting device is carried out optical modulation respectively, carry out projection after the synthetic light modulated of all kinds.
18. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess outgoing different colours light,
In the described lighting device at least one is the lighting device of record in the claim 15,
To carry out optical modulation to equidirectional and by display panel from the photoconduction of all kinds of each lighting device, then light modulated of all kinds be carried out projection.
19. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 16,
By single display panel the white light from described lighting device is modulated, and this light modulated of projection.
20. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 16,
To be separated into red light, green light and blue light from the white light of described lighting device, each coloured light be carried out optical modulation respectively, carry out projection after light modulated of all kinds is synthesized by display panel.
21. lighting device according to claim 1 is characterized in that, possesses:
To be converted to first polarized light conversion device of the polarized light of first direction from the light that first light source described a plurality of light sources penetrates;
To be converted to the second polarized light device from the light that the secondary light source different with described first light source penetrates with the polarized light of the second direction of described first direction quadrature;
Described light path change mechanism by see through and reflection in any function make from described first light source outgoing and the light that becomes the first direction polarized light and import the specific light path, will penetrate and the light that becomes the second direction polarized light imports the described specific light path from described secondary light source by another function simultaneously.
22. lighting device according to claim 21, it is characterized in that, make the outgoing light quantity of described first light source and described secondary light source different, so that the polarized light of the first direction that the described light path change of process mechanism obtains equates with the light quantity of the polarized light of second direction.
23. lighting device according to claim 21 is characterized in that, possesses:
Be arranged on first fly lens of the light exit side of each light source;
Be arranged on the described specific light path, paired with first fly lens respectively, and light is assembled second fly lens of back guiding lighting object.
24. lighting device according to claim 21 is characterized in that, possesses tubular or bar-shaped optical integrator on the described specific light path.
25. lighting device according to claim 21 is characterized in that, possesses:
Switch polarized light rotating element, its on/off by energising is switched makes the polarisation of light direction that receives revolve functional status that turn 90 degrees and the functional status that does not make its rotation;
Control the on-off circuit of this switch polarized light rotating element;
Described switch polarized light rotating element is configured on the described specific light path,
The described control gear of lighting is lighted control, so that the pulsed illumination of first light source and secondary light source is regularly staggered,
The pulsed illumination of described on-off circuit and described solid-state light emitting element is regularly synchronous, and makes described switch polarized light rotating element on/off, the unified polarisation of light direction that obtains through described switch polarized light rotating element.
26. lighting device according to claim 21 is characterized in that, the light of each light source outgoing same color.
27. lighting device according to claim 21 is characterized in that, each light source outgoing white light or become white each coloured light.
28. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess the light of outgoing different colours,
In the described lighting device at least one is the lighting device of record in the claim 26,
By display panel each coloured light from each lighting device is carried out optical modulation respectively, and after synthetic light modulated of all kinds, carry out projection.
29. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess the light of outgoing different colours,
In the described lighting device at least one is the lighting device of record in the claim 26,
Equidirectional and carry out optical modulation, this light modulated of projection by single display panel will lead respectively from each coloured light of each lighting device.
30. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 27,
By single display panel to carrying out optical modulation from the white light of described lighting device or each coloured light of becoming white, and this light modulated of projection.
31. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 27,
To be separated into the light of different colours from the white light of described lighting device, by display panel each coloured light be carried out optical modulation respectively, and after synthetic light modulated of all kinds, carry out projection.
32. according to each described projection display device in the claim 28～31, it is characterized in that,
When possessing display panels, possess the panel drive circuit that drives described display panels with light incident side polaroid as described display panel,
The described control gear of lighting is lighted control, so that the pulsed illumination of first light source and secondary light source regularly staggers,
When described panel drive circuit incides described display panels at the polarized light of described first direction, with the display panels of being used for that is generated, picture signal that the direction of polarized light of light incident side is intersected with respect to the polaroid of exiting side or generated be used for display panels, the direction of polarized light of light incident side offers described display panels with respect to either party picture signal in the parallel picture signal of the polaroid of exiting side, when the polarized light of second direction incides described display panels other picture signals is offered described display panels on the other hand.
33. lighting device according to claim 25 is characterized in that, the light of each light source outgoing same color.
34. lighting device according to claim 25 is characterized in that, each light source outgoing white light or become white each coloured light.
35. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess the light of outgoing different colours,
In the described lighting device at least one is the lighting device of record in the claim 33,
By display panel each coloured light from each lighting device is carried out an optical modulation respectively, and after synthetic light modulated of all kinds, carry out projection.
36. a projection display device is characterized in that, constitutes:
The a plurality of lighting devices that possess the light of outgoing different colours,
In the described lighting device at least one is the lighting device of record in the claim 33,
Equidirectional and carry out optical modulation, this light modulated of projection by single display panel will lead respectively from each coloured light of each lighting device.
37. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 34,
By single display panel to carrying out optical modulation, this light modulated of projection from the white light of described lighting device or each coloured light of becoming white.
38. a projection display device is characterized in that, constitutes:
The lighting device that possesses record in the claim 34,
To be separated into the light of different colours from the white light of described lighting device, each coloured light be carried out optical modulation respectively, and after synthetic light modulated of all kinds, carry out projection by display panel.
39., it is characterized in that, having possessed display panels as described display panel according to each described projection display device in the claim 35～38.
40. according to each described projection display device in each or the claim 35～38 in the claim 28～31, it is characterized in that,
The level of picture signal that offers described display panel when offering the polarized light of the level of picture signal of described display panel and reception second direction when making the polarized light that receives first direction is different.
41. projection display device according to claim 32 is characterized in that,
The level of picture signal that offers described display panel when offering the polarized light of the level of picture signal of described display panel and reception second direction when making the polarized light that receives first direction is different.
42. according to the described projection display device of claim 39, it is characterized in that,
The level of picture signal that offers described display panel when offering the polarized light of the level of picture signal of described display panel and reception second direction when making the polarized light that receives first direction is different.
43. lighting device according to claim 21 is characterized in that, it is the polarization spectroscope of glass cubic build that described light path changes mechanism.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004220077 | 2004-07-28 | ||
| JP2004220077A JP4183663B2 (en) | 2004-07-28 | 2004-07-28 | Illumination device and projection display device |
| JP2005184237 | 2005-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1727988A true CN1727988A (en) | 2006-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510088427 Pending CN1727988A (en) | 2004-07-28 | 2005-07-28 | Illuminating device and projection type video display |
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| Country | Link |
|---|---|
| JP (1) | JP4183663B2 (en) |
| CN (1) | CN1727988A (en) |
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| US8011796B2 (en) | 2007-06-15 | 2011-09-06 | Delta Electronics, Inc. | Light source system and display apparatus comprising the light source system |
| CN102346361A (en) * | 2010-08-03 | 2012-02-08 | 精工爱普生株式会社 | Projection-type display device and method of controlling thereof |
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- 2004-07-28 JP JP2004220077A patent/JP4183663B2/en not_active Expired - Fee Related
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- 2005-07-28 CN CN 200510088427 patent/CN1727988A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4183663B2 (en) | 2008-11-19 |
| JP2006039277A (en) | 2006-02-09 |
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