CN101600120B - Method and device for displaying image by reducing power consumption - Google Patents
Method and device for displaying image by reducing power consumption Download PDFInfo
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- CN101600120B CN101600120B CN 200810067702 CN200810067702A CN101600120B CN 101600120 B CN101600120 B CN 101600120B CN 200810067702 CN200810067702 CN 200810067702 CN 200810067702 A CN200810067702 A CN 200810067702A CN 101600120 B CN101600120 B CN 101600120B
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Abstract
The invention relates to a method and a device for displaying image by reducing power consumption. On the basis of little appearance opportunity of a large high-brightness pure white area in an image, an image analyzer is additionally provided on the basis of the prior projection display system, image data is analyzed by using a frame as a unit so as to ensure a multiplication number of various kinds of fundamental color data, control signals which are relative to the image data and the multiplication number are output to a light source so as to reduce and regulate the output power of fundamental color light beams, the fundamental color data of the image data can be correspondingly controlled, magnified and regulated, and thereby under the premise that the display image is not affected in the brightness and the contrast ratio, the power consumption of the projection display system is greatly reduced. The display contrast ratio of the system can be improved by adopting the method and the device for displaying image and an LED light source.
Description
Technical field the present invention relates to Image Communication, relates in particular to coloured image and shows method for displaying image and device in the projection arrangement of usefulness.
Background technology is in field of image projection, and for example (but being not limited to) relates to rear-projection TV (RPTV) or front projector, and the light source applications technology is more and more ripe.Prior art is constantly carried out performance, structure or cost optimization to said light source when for this field the changeable colour light source being provided.
In view of solid state light emitter; Semiconductor light-emitting-diode (Light Emitting Diode for example; LED) have advantages such as long service life, low in energy consumption, wavelength-tunable, along with continuing to bring out of various novel high-power high-brightness LEDs, led light source obtains increasing application in above-mentioned field.
Typical projection display system is as shown in Figure 1.It comprises red light source, green light source and the blue-light source that is used for producing a branch of ruddiness (R), green glow (G) and blue light (B) respectively; And be used for modulating and make said red, green, blue light beam produce the light valve of coloured image and be used for throwing red, green, blue light beam after said light valve modulation to the optical projection camera lens of screen with the generation image.Said red, green, blue light beam can but be not limited to conduct to color-combination prism through optical fiber, after converging, transport to light valve.Said light valve can be microelectromechanical-systems (MEMS, a micro-electron-mechanical system) equipment, for example based on the technological light valve of the DLP of company of Texas Instrument (Texas Instrument) (Digital Light Processing).Signal processor controls respectively each light source and optical modulator through drive signal.For example, when red-light source is unlocked and during red-emitting, signal processor will red image data be sent to optical modulator (digital micro-mirror device for example, DMD); Similarly, when green glow or blue light source be unlocked and launch green/during blue light, signal processor is sent to optical modulator with/blue image data green accordingly.If when all red, green and blue light sources all are unlocked, the gray image data will be sent to optical modulator.Wherein, the feedback control loop that light source drive signal and feedback signal are formed can be kept the stability of light source colourity and brightness, and can be used to regulate the colour temperature of projected image.Image beam after the modulation arrives display screen via projection lens projects at last.
In the above-mentioned projection display system, can also change into and adopt three light valves to come modulated red, green and blue beam respectively, converge guiding said projection lens in back to the red, green, blue light beam after the modulation through color-combination prism again.
Said red light source, green light source and blue-light source can also produce with following manner: white light source is combined with colour wheel, utilize the motion of colour wheel, change the output color of white light with transmission or reflection mode, thereby obtain the red, green, blue light beam of timesharing output.
Application number is that 038071487 one Chinese patent application discloses the method that is used to strengthen image brightness and contrast in a kind of Projection Display.This method is based on the system that provides at least one scrolling light band, display floater to be thrown light on by this scrolling light band by UHP (very-high performance) lamp and scanner; Comprise step: image is carried out confirming of maximum pixel brightness with behavior unit; Control and the corresponding aperture of regulating this pixel on the display floater are 100%, the aperture that its pixel of this Xingqi of corresponding adjusting simultaneously is corresponding and corresponding to the lamp power supply of this row; Confirm that also each row obtains the lamp power of desired high-high brightness when turning on fully in the aperture; Regulating the lamp power profile, to make the average power of image be specified lamp power; So that the former row that just has the maximum diameter of hole can use the lamp power that is higher than mean value, otherwise the lamp power of corresponding this row of reduction; Like this, control the brightness and contrast that the lamp power supply can strengthen projection image by said lamp power profile.
The shortcoming of above-mentioned prior art is: increasingly high along with existing projection market display screen, brightness, optical projection system is also increasingly high to the requirement of light source power; Though disclosed projection display system can improve the brightness and contrast of projected image in the above-mentioned patent application, other optical projection system is the same can not to reduce system power dissipation with having now.Especially; Said UHP lamp closes to have no progeny needs the long time to light once more; Thereby generally, this UHP lamp need keep brightness constant or change little, when making in this scheme image corresponding to black; It is dark that screen can not reach completely, and promptly the Display Contrast that can not realize ideal of this scheme is 1: 0.
The technical problem that summary of the invention the present invention will solve is the weak point to above-mentioned prior art, and proposes a kind of method and device, can make optical projection system keep under the prerequisite that display brightness and contrast index roughly do not descend the reduction system power dissipation.
For solving the problems of the technologies described above; Of the present inventionly be contemplated that basically: with red, green, blue three primary colors display system is example; Chance based on occurring the pure white zone of bulk high brightness in the image is few, and the red, green, blue that generally is utilized does not reach its maximum simultaneously; Analyze a two field picture if use an image dissector; Find out the current maximum of red, green, blue primary colours GTG in each pixel data of this image; With its expand to respectively theoretical maximum (with but when being not limited to 24 RGBs maximum 255 be example); When thereby corresponding each primary colours GTG with whole pixel datas enlarges identical multiple, correspondingly reduce the red, green, blue optical output power of light source; Like this, on optical projection system, be able to images displayed and can have and roughly be not less than original brightness and contrast, and reduced the power consumption of system because of the decline of light source output power.Especially, when producing the red, green, blue light time, because the real-time of LED switch control is good, can make screen display reach complete black, thereby improve the demonstration contrast of system with LED.
As realizing that the technical scheme that the present invention conceives is, a kind of method for displaying image that reduces power consumption is provided, be used for the projection display system of image, comprise step:
B. light source produces some primary color light bundles provides light output toward light valve;
C. image-signal processor is sent to light valve with a frame image data, is used for modulating said light output to produce chromatic image beam;
D. said chromatic image beam toward screen, demonstrates coloured image through the projection of optical projection camera lens;
Especially, also comprise step:
A. utilize an image dissector to read this frame image data and definite wherein various primary colours luma data maximum separately; Confirm that a predetermined reference value and said each peaked ratio are each multiplication number; And then the output control signal relevant with view data toward said light source adjusting the present output power of each said primary color light bundles, and the output control signal corresponding toward said image-signal processor to adjust said view data;
Among the step C, be sent to before the said light valve, each primary colours luma data of said view data is adjusted processing according to corresponding said multiplication number earlier; Among the said step B, the power output of the some primary lights of said light source is regulated and control accordingly simultaneously;
And, among the step C, the adjustment of each primary colours luma data of said view data handled comprise step:
1. amplify this primary colours luma data with said multiplication number, obtain corresponding screen and show virtual luma data;
2. the second look-up table by prior setting obtains in order to replace the actual input luma data of this primary colours luma data; Said second look-up table has shown that under not changing the prerequisite that shows contrast in the image, this actual input GTG and said screen show the data corresponding relation between the virtual GTG.
In the such scheme, confirm the power output of each primary lights of light source described in the present frame, and regulate and control realization through the power supply source that changes said light source according to said each primary colours luma data maximum.
In the such scheme, said light source three primary colors power output regulation and control are based on the current power supply source supplemental characteristic of the light source of being confirmed by first look-up table of prior setting; This first look-up table has shown and is not changing under the primary colours display brightness prerequisite of a pixel data corresponding relation between this primary colours GTG and the said power supply source parameter.
In the such scheme, said light source produces red, green, blue three primary colors light beam; Correspondingly, each included pixel data of said view data comprises red, green, blue three primary colors data.
In the such scheme, said light source comprises one group of LED or led array of being used as light emitting source, provides incident ray to comprise some telecontrol equipments with zone of different light transmission features toward one; The motion of this telecontrol equipment makes said several regions reflect successively or the said incident ray of transmission and timesharing produces said some primary color light bundles.
In the such scheme; Said light source comprises one group of LED or led array or LASER Light Source of being used as excitation source; Provide past one of excitation line to comprise some telecontrol equipments with material for transformation of wave length of different wave length transfer characteristic, these material for transformation of wave length subregion on this telecontrol equipment is provided with; The motion of this telecontrol equipment makes said some material for transformation of wave length absorb said excitation line successively and timesharing excites and produces different primary color light bundles.
As the technical scheme that realizes the present invention's design still, a kind of image display device that reduces power consumption is provided, comprises light valve; Can produce and provide the light source of some primary color light bundles output, receive and view data is sent to the image-signal processor of said light valve, with the chromatic image beam guiding of said light valve modulation output and projection optical projection camera lens toward display screen toward said light valve; Especially, also comprise an image dissector, read this frame image data and confirm wherein various primary colours luma data maximum separately; Confirm that a predetermined reference value and said each peaked ratio are each multiplication number; And then the output control signal relevant with view data toward said light source adjusting the present output power of each said primary color light bundles, and the output control signal corresponding toward said image-signal processor to adjust said view data; And before being sent to said light valve, each primary colours luma data of said view data is adjusted processing according to corresponding said multiplication number earlier, comprises step:
1. amplify this primary colours luma data with said multiplication number, obtain corresponding screen and show virtual luma data;
2. the second look-up table by prior setting obtains in order to replace the actual input luma data of this primary colours luma data; Said second look-up table has shown that under not changing the prerequisite that shows contrast in the image, this actual input GTG and said screen show the data corresponding relation between the virtual GTG.
In the such scheme, also comprise the first look-up table unit, produce the said control signal for light source that is sent to according to the result of said image dissector data analysis.
In the such scheme, said light source comprises a control unit, receives the said control signal for light source that is sent to, to control the power supply source of said light source.
In the such scheme, said light source comprises three groups of independently LED or led array, produces and provide red, green, blue three primary colors light beam.
In the such scheme, said light source also comprises a location device, according to the motion of said telecontrol equipment produce one rely this telecontrol equipment of feedback the framing signal of position, offer said control unit.
In the such scheme, said telecontrol equipment is rolling disc, displacement disc or rotary drum.
Adopt above-mentioned each technical scheme, can reduce system power dissipation, thereby reduce the use cost of display system.
Description of drawings Fig. 1 is existing projection display system theory diagram;
Fig. 2 is the theory diagram of image display device of the present invention;
Fig. 3 is one of image display device of the present invention and light source embodiment thereof a sketch map
Fig. 4 is two sketch mapes of image display device of the present invention and light source embodiment thereof;
Fig. 5 is the structural representation block diagram of light source embodiment among Fig. 4;
Fig. 6 is one of the alternate embodiment of light source rotating disk and light path among a Fig. 4 sketch map;
Fig. 7 is two sketch mapes of the alternate embodiment of light source rotating disk and light path among Fig. 4
Fig. 8 is three sketch mapes of the alternate embodiment of light source rotating disk and light path among Fig. 4
Fig. 9 is the method flow exemplary plot that image of the present invention shows;
Figure 10 is the screen output GTG and input GTG relation curve sketch map of display system.
Below the embodiment, further set forth the present invention in conjunction with the most preferred embodiment shown in the accompanying drawing.
The general employing of conventional images projection display system is red, green, blue three primary colors.In order to improve colour gamut, the six-basic-color that yellow, pinkish red, blue or green three kinds of colors constitute also appears in TV, the film field increasing.Print field can also be three primary colors with yellow, pinkish red, green grass or young crops then.In order to narrate conveniently, each embodiment will be mainly with red, and is green, and blue three primary colors are that example is explained, but do not limit the primary colours scope that the present invention uses.
Therefore, conventional images projection display system and operation principle summary are: comprise light source, can produce and provide the output of red, green, blue three primary colors light beam toward light valve; Image-signal processor receives and at least one frame image data is sent to light valve, is used for modulating said light output to produce chromatic image beam; The optical projection camera lens guides said chromatic image beam to throw toward screen, demonstrates coloured image.On this basis, the improvement that the inventive method is made is before above-mentioned processing, to increase following steps:
To view data is that unit analyzes to confirm wherein three kinds of primary colours luma data of red, green, blue multiplication number separately with the frame; Thereby when above-mentioned processing procedure, the red, green, blue three primary colors luma data of each said view data was adjusted processing according to the said multiplication number of correspondence earlier before being sent to said light valve; Simultaneously the three primary colors power output of said light source is regulated and control accordingly.
Specifically the flow chart with Fig. 9 is that example is explained as follows: utilize an image dissector to read a frame image data; Confirm red (R), green (G) of all pixels in this frame image data, blue (B) three primary colors luma data maximum separately earlier.Establish a predetermined reference value again, confirm that this predetermined reference value and each said peaked ratio are the multiplication number.Said predetermined reference value can but to be not limited to be light valve can be supported luma data under predetermined display mode maximum, being preestablished by system provides.With 24 very the maximum 255 during color pattern be example, the R in this frame image data, G and B GTG maximum are adjusted to 255 by expansion respectively, other R, G, B luma data are enlarged by same multiplication number respectively and are sent to light valve after handling; Meanwhile; Confirm light source R described in the present frame, G, B optical output power according to said each primary colours luma data maximum; And regulate and control realization: for example, when the corresponding multiplication number of a primary colours maximum is 2, can the Output optical power of these primary colours in the light source be reduced half the through the power supply source that changes said light source; Because the input power of light source itself and the non-linear relation of Output optical power, the minimizing of the input power of light source will equal or more than half.Like this, and compare under the original power output situation of light source, this luminance primary of the corresponding pixel of this maximum this moment is constant.
When but said light source adopts LED or the laser of high frequency modulated; In order to realize more control purpose and effect; To the control of said power supply source, can use digital circuit to modulate to change the waveform of said light source input voltage or input current, for example through modulation control power supply switch tube; Provide a pulse to make power supply close said excitation source again for this switching tube, thereby change the optical output power of this excitation source with next the lighting fully of very fast speed (avoiding flicker) with its nominal current.Said modulation comprises pulse-width modulation, frequency modulation(FM) or parallactic angle modulation.Wherein pulse-width modulation is to realize through the width that change offers the pulse of said power supply switch tube; Frequency modulation(FM) is the width of fixing said pulse then, and the said control to excitation source is realized in the recurrence interval that changes this pulse; Parallactic angle modulation then is to produce corresponding spike train with a string binary data (each pulse duration in this spike train comes unique definite by the corresponding bit place value of this pulse; For example lowest order was 1 unit interval; Inferior low level be 2 unit interval; Low once more by 4,8,16...... unit interval, the rest may be inferred).For different illumination application requirements, can adopt the corresponding modulation control mode.Because of these modulation controls are prior art, do not give an example in detail at this.
Because it is few to exist in the frame raw image data R, G, B GTG maximum to be 255 chance; After the present invention handles; The R of view data, G or B GTG dynamic range can obtain enlarging as a rule; The power output of light source is reduced simultaneously, makes the power consumption of system greatly descend.Because shown in table one, light-source brightness (corresponding with power output) is non-linear relation with the light source driving current value, and also not quite identical for this non-linear relation of different light sources.The present invention sets one first look-up table for this reason in advance, is used for being illustrated under the prerequisite of each the primary colours display brightness that does not change a pixel data corresponding relation between each primary colours GTG and the said power supply source parameter.Table two is the anticipated partial content of this first look-up table of illustration with the LED current parameters.This look-up table can be arranged on nonvolatile memory, for example among the ROM.After said image dissector judgement obtains the said maximum of each primary colours luma data, check in the pairing LED drive current of each said maximum, so that the control unit of light source further produces corresponding power supply source adjustment control signal by this first look-up table.Certainly, the said current parameters in this first look-up table unit also can be used such as various LED modulator control signal parameters such as aforesaid pulsewidth, frequencies and replace, and searches and controls more directly to accomplish quickly.
Table one:
Table two:
For the said chromatic image beam that makes light valve output keeps being not less than original display brightness of this two field picture and contrast, our corresponding problem of linearity of whether having between considering screen display brightness and the screen input brightness.If represent the screen output GTG corresponding with screen display brightness with s, with the r representative screen input GTG corresponding with screen input brightness, then there is following relational expression in display system usually:
S＝cr
γ
Wherein, c represents constant, and γ is a gamma factor.For the display system that is linear gamma (γ=1) relation, in the methods of the invention, the adjustment of each primary colours luma data of said view data is handled as long as amplify this primary colours luma data with said multiplication number.What appear is non-linear gamma relation but display system is more, shown in figure 10, is that a γ is substantially equal to screen output GTG and the relation curve of input GTG in 2.2 the display system.To such display system; When a luma data by a multiplication number linear amplification also behind " input " screen; Because this primary light source power output is adjusted, the brightness of screen actual displayed generally can be greater than or less than the pairing display brightness of screen input brightness this moment.Therefore, the actual displayed contrast of image is with impaired.Formula for fear of complicacy calculates and avoids taking the processor excess resource; The present invention introduces screen to such display system and shows virtual GTG and the notion of importing GTG in most preferred embodiment: with compare under the original power output situation of light source; A luma data is shown pairing adjustment back data without distortion be regarded as actual input GTG, utilize the data after said multiplication number directly amplifies this GTG to be regarded as the apparent virtual GTG of screen; Then can set a second look-up table according to the gamma relation or the gamma relation curve of this system in advance; Be illustrated under the prerequisite that does not change image demonstration contrast, each primary colours actual input GTG and said screen show the data corresponding relation between the virtual GTG (corresponding to the output GTG of gamma relation).
In sum, in the methods of the invention, the adjustment of each primary colours luma data of said view data handled comprise step: amplify this primary colours luma data with said multiplication number, obtain the apparent virtual luma data of corresponding screen; Obtain in order to replace the actual input luma data of this primary colours luma data by said second look-up table again.This second look-up table can be based on the inside of said image-signal processor or plug-in ROM and is set up.
Fig. 2 has illustrated the theory diagram of image display device of the present invention; Fig. 3 is an embodiment block diagram of apparatus of the present invention.Different with existing apparatus is; Apparatus of the present invention also comprise an image dissector; With the view data that receives is that unit carries out data analysis with the frame; And then the output control signal relevant with view data toward said light source adjusting the power output of said three primary colors light beam, and the output control signal corresponding makes said view data received after data are sent to light valve after amplifying adjustment by this image-signal processor toward image-signal processor.Said image dissector and said image-signal processor can adopt same chip to realize, for example adopt programmable logic device, realize like CPLD or FPGA; Also can adopt different chips to realize respectively.
Said light source adopts LED (light-emitting diode) to have and is easy to control and control the good advantage of real-time.Shown in Fig. 3 embodiment, this light source can comprise some groups (for example three groups) independently LED or led array, produces and provide said red, green, blue three primary colors light beam respectively.These red, green, blue three primary colors light beams are led after color-combination prism converges toward said light valve.Three tunnel control signals of will exporting said image dissector are sent to the power supply source of said three groups of LED or led array respectively.The present invention can also obtain feedback signal from the power supply source of said three groups of LED or led array or light output and send said image dissector respectively back to, so that System self-test or improve stability.
In addition; In apparatus of the present invention, said light source can also be as shown in Figure 4, comprises one group of LED or led array that is used as light emitting source; Provide incident ray to comprise some telecontrol equipments (, also claiming colour wheel) such as but not limited to illustrated rolling disc with zone of different light transmission features toward one; The motion of this telecontrol equipment makes the said several regions said incident ray of transmission and timesharing produces said red, green, blue three primary colors light beam successively.Usually, said LED or led array are selected as and emit white light, and said rolling disc comprises at least 3 said zones, are used for the transmission red, green, blue respectively.Produce the difference of efficient according to system's different colours light; Can dispose and make the corresponding colour wheel zone of said red, green, blue three primary colors light have different accountings; Thereby as this is shown in Figure 4, can (but being not limited to) comprise 4 zones (a, b, c, d) on the said rolling disc, and for example regional a, b pass through ruddiness; The c light that reveals the green, d passes through blue light.If adopt different light path design, said transmission can also be equal to alternatively, as shown in Figure 6 with reflecting, and rolling disc reflects said incident ray through different light transmission features zone and produces different primary color light bundles.
Light source as shown in Figure 4; Also can be to comprise one group of LED or led array or LASER Light Source that is used as excitation source; Provide past one of excitation line to comprise some telecontrol equipments (such as but not limited to illustrated rolling disc) with material for transformation of wave length of different wave length transfer characteristic, these material for transformation of wave length subregion on this telecontrol equipment is provided with; The motion of this telecontrol equipment makes said some material for transformation of wave length absorb said excitation line successively and timesharing excites and produces different primary color light bundles.
When the emission light of said excitation source was blue light, said rolling disc comprised at least two kinds of said material for transformation of wave length, was used for being excited to produce red, green primary light beam respectively.Said rolling disc can comprise at least 3 zones, and wherein two are used for carrying respectively said two kinds of material for transformation of wave length, another be used for reflecting or the emission light of the said excitation source of transmission so that the blue primary light beam to be provided.
When the emission light of said excitation source was ultraviolet light, said rolling disc comprised at least three kinds of said material for transformation of wave length, was carried on respectively on three zones of this rolling disc, was used for being excited to produce the red, green, blue primary color light bundles.
Equally, according to the difference of light conversion efficiency, can dispose and make the corresponding zone of said different wave length transition material on rolling disc, have different accountings.
Said material for transformation of wave length comprises fluorescent material, dyestuff or quantum dot.Said telecontrol equipment can also be a rotary drum as shown in Figure 7 except above-mentioned rolling disc, or displacement disc as shown in Figure 8.
Fig. 5 has further illustrated light-source structure of the present invention, and it comprises a control unit.Apparatus of the present invention also comprise one first look-up table unit, produce the said control signal for light source that is sent to according to the result of said image dissector data analysis, control the power supply source of said light source, make this light source that the light of the three primary colors with corresponding power output is provided.Accurate control for ease of the output beam color; Said light source can be provided with a location device on telecontrol equipment; With the motion of this telecontrol equipment produce one rely this telecontrol equipment of feedback the framing signal of position, offer said control unit, realize accurate location to said zone.This positioner is as shown in Figure 6; Can but to be not limited to be a projection at rolling disc edge; A photodetector or a dynamo-electric inspection of aiming at the precalculated position is set outside said telecontrol equipment touches device, when the motion of this rolling disc drives this precalculated position of said projection arrival, produce a trigger impulse; Be used as said framing signal, point out the beginning of regional a.This positioner can also be as shown in Figure 7; Can but be not limited to be the reflection bar that is provided with on the rotary drum or absorb bar; Be used for reflecting or absorbing the light that is adopted in photoelectric emission and the receiving system; So that when this reflection bar or absorption bar move with rotary drum, the light path of connecting or block receiving system is produced the beginning that corresponding pulse signal is pointed out regional a.Even when producing motion under the effect of said telecontrol equipment at servomechanism installation, said servomechanism installation might be exported the relevant signal of an angle or position, and this signal can be used as the framing signal of said positioner.
Shown in the dotted portion of Fig. 5, light source of the present invention can also comprise a Photoelectric Detection probe, and output detects and testing result is sent to said control unit to the light after the rolling disc described in the optical channel; Can this control unit be adjusted said control signal according to this testing result, so that to the strict field of light source requirements, meet the demands to the light source emergent light and to detect.
The inventive method and device can greatly reduce the power consumption of system through experimental verification in the projection of normal image.Especially, be example with the black image terrifically, said image dissector can be exported control signal led light source is turned off fully, thus the black of on screen, realizing ideal has promoted the contrast of image.
Also can reach the purpose that reduces system power dissipation for the two field picture that some is existed the high brightness white region; The inventive method can also be improved based on the flow process of Fig. 9 slightly; Increase or change step are following: after said image dissector reads two field picture, judge earlier that whether the high brightness white region that exists in this two field picture is less than predetermined scope; If not, then abandon adjustment to view data and light source power supply source; Otherwise will in the view data scope outside the said high brightness white region, confirm the said maximum of each primary colours.This frame image data is adjusted when handling, is kept original value constant view data within the said high brightness white region, outside data handle according to preceding method.The simulated experiment checking, distortion can be in human eye be accepted scope to the image after the processing (especially containing the general television image that the highlighted word curtain shows).
Claims (27)
1. method for displaying image that reduces power consumption is used for the projection display system of image, comprises step:
B. light source produces some primary color light bundles provides light output toward light valve;
C. image-signal processor is sent to light valve with a frame image data, is used for modulating said light output to produce chromatic image beam;
D. said chromatic image beam toward screen, demonstrates coloured image through the projection of optical projection camera lens;
It is characterized in that, also comprise step:
A. utilize an image dissector to read this frame image data and definite wherein various primary colours luma data maximum separately; Confirm that a predetermined reference value and said each peaked ratio are each multiplication number; And then the output control signal relevant with view data toward said light source adjusting the present output power of each said primary color light bundles, and the output control signal corresponding toward said image-signal processor to adjust said view data;
Among the step C, be sent to before the said light valve, each primary colours luma data of said view data is adjusted processing according to corresponding said multiplication number earlier; Among the said step B, the power output of the some primary lights of said light source is regulated and control accordingly simultaneously;
And, among the step C, the adjustment of each primary colours luma data of said view data handled comprise step:
1. amplify this primary colours luma data with said multiplication number, obtain corresponding screen and show virtual luma data;
2. the second look-up table by prior setting obtains in order to replace the actual input luma data of this primary colours luma data;
Said second look-up table has shown that under not changing the prerequisite that shows contrast in the image, this actual input GTG and said screen show the data corresponding relation between the virtual GTG.
2. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
Said predetermined reference value is light valve can be supported luma data under predetermined display mode a maximum.
3. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
When said image dissector is judged the high brightness white region that exists in this two field picture less than predetermined scope, each said maximum will be confirmed according to the view data outside the said high brightness white region.
4. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
Confirm the power output of each primary lights of light source described in the present frame according to said each primary colours luma data maximum, and regulate and control realization through the power supply source that changes said light source.
5. according to the method for displaying image of the said reduction power consumption of claim 4, it is characterized in that:
The mode that changes the power supply source of said light source comprises: adopt pulse-width modulation, frequency modulation(FM) or parallactic angle modulation system to change the waveform of said light source input voltage or input current.
6. according to the method for displaying image of claim 1 or 4 said reduction power consumptions, it is characterized in that:
Said light source three primary colors power output regulation and control are based on the current power supply source supplemental characteristic of the light source of being confirmed by first look-up table of prior setting; This first look-up table has shown and is not changing under the primary colours display brightness prerequisite of a pixel data corresponding relation between this primary colours GTG and the said power supply source parameter.
7. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
Said light source produces red, green, blue three primary colors light beam; Correspondingly, each included pixel data of said view data comprises red, green, blue three primary colors data.
8. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
Said light source comprises some groups of independently LED or led array, produces and provide said some primary color light bundles.
9. the method for displaying image of said according to Claim 8 reduction power consumption is characterized in that:
Said some primary color light bundles are led after color-combination prism converges toward said light valve.
10. according to the method for displaying image of the said reduction power consumption of claim 1, it is characterized in that:
Said light source comprises one group of LED or led array of being used as light emitting source, provides incident ray to comprise some telecontrol equipments with zone of different light transmission features toward one; The motion of this telecontrol equipment makes said several regions reflect successively or the said incident ray of transmission and timesharing produces said some primary color light bundles.
11. the method for displaying image according to the said reduction power consumption of claim 10 is characterized in that:
Said LED or led array emit white light, and said telecontrol equipment comprises at least 3 said zones, are used for respectively reflecting or the transmission red, green, blue.
12. the method for displaying image according to the said reduction power consumption of claim 1 is characterized in that:
Said light source comprises one group of LED or led array or LASER Light Source of being used as excitation source; Provide past one of excitation line to comprise some telecontrol equipments with material for transformation of wave length of different wave length transfer characteristic, these material for transformation of wave length subregion on this telecontrol equipment is provided with; The motion of this telecontrol equipment makes said some material for transformation of wave length absorb said excitation line successively and timesharing excites and produces different primary color light bundles.
13. the method for displaying image according to the said reduction power consumption of claim 12 is characterized in that:
The emission light of said excitation source is blue light, and said telecontrol equipment comprises at least two kinds of said material for transformation of wave length, is used for being excited to produce red, green primary light beam respectively.
14. the method for displaying image according to the said reduction power consumption of claim 13 is characterized in that:
Said telecontrol equipment comprises at least 3 said zones, and wherein two are used for carrying respectively said two kinds of material for transformation of wave length, another be used for reflecting or the emission light of the said excitation source of transmission so that the blue primary light beam to be provided.
15. the method for displaying image according to the said reduction power consumption of claim 12 is characterized in that:
The emission light of said excitation source is ultraviolet light, and said telecontrol equipment comprises at least three kinds of said material for transformation of wave length, is used for being excited to produce the red, green, blue primary color light bundles respectively.
16. the method for displaying image according to the said reduction power consumption of claim 12 is characterized in that:
Said material for transformation of wave length comprises fluorescent material, dyestuff or quantum dot.
17. the method for displaying image according to claim 10 or 12 said reduction power consumptions is characterized in that:
Said telecontrol equipment is rolling disc, displacement disc or rotary drum.
18. an image display device that reduces power consumption comprises light valve; Can produce and provide the light source of some primary color light bundles output, receive and view data is sent to the image-signal processor of said light valve, with the chromatic image beam guiding of said light valve modulation output and projection optical projection camera lens toward display screen toward said light valve; It is characterized in that:
Also comprise an image dissector, read this frame image data and confirm wherein various primary colours luma data maximum separately; Confirm that a predetermined reference value and said each peaked ratio are each multiplication number; And then the output control signal relevant with view data toward said light source adjusting the present output power of each said primary color light bundles, and the output control signal corresponding toward said image-signal processor to adjust said view data;
And before being sent to said light valve, each primary colours luma data of said view data is adjusted processing according to corresponding said multiplication number earlier, comprises step:
1. amplify this primary colours luma data with said multiplication number, obtain corresponding screen and show virtual luma data;
2. the second look-up table by prior setting obtains in order to replace the actual input luma data of this primary colours luma data;
Said second look-up table has shown that under not changing the prerequisite that shows contrast in the image, this actual input GTG and said screen show the data corresponding relation between the virtual GTG.
19. the image display device according to the said reduction power consumption of claim 18 is characterized in that:
Also comprise the first look-up table unit, produce the said control signal for light source that is sent to according to the result of said image dissector data analysis.
20. the image display device according to the said reduction power consumption of claim 18 is characterized in that:
Said light source comprises a control unit, receives the said control signal for light source that is sent to, to control the power supply source of said light source.
21. the image display device according to claim 18 or 20 said reduction power consumptions is characterized in that:
Said light source comprises three groups of independently LED or led array, produces and provide red, green, blue three primary colors light beam.
22. the image display device according to claim 18 or 20 said reduction power consumptions is characterized in that:
Said light source comprises one group of LED or led array of being used as light emitting source, provides incident ray to comprise some telecontrol equipments with zone of different light transmission features toward one; The motion of this telecontrol equipment makes said several regions reflect successively or the said incident ray of transmission and timesharing produce red, green, blue three primary colors light beam.
23. the image display device according to claim 18 or 20 said reduction power consumptions is characterized in that:
Said light source comprises one group of LED or led array or LASER Light Source of being used as excitation source; Provide past one of excitation line to carry some telecontrol equipments with material for transformation of wave length of different wave length transfer characteristic, these material for transformation of wave length subregion on this telecontrol equipment is provided with; The motion of this telecontrol equipment makes said some material for transformation of wave length absorb said excitation line successively and timesharing excites and produces different primary color light bundles.
24. the image display device according to the said reduction power consumption of claim 23 is characterized in that:
Said telecontrol equipment comprises that at least two kinds are excited to produce respectively said material for transformation of wave length red, the green primary light beam.
25. the image display device according to the said reduction power consumption of claim 23 is characterized in that:
Said telecontrol equipment comprises at least three kinds of said material for transformation of wave length of being excited to produce respectively the red, green, blue primary color light bundles.
26. the image display device according to claim 22 or 23 said reduction power consumptions is characterized in that:
Said light source also comprises a location device, according to the motion of said telecontrol equipment produce one rely this telecontrol equipment of feedback the framing signal of position, offer said control unit.
27. the image display device according to claim 22 or 23 said reduction power consumptions is characterized in that:
Said telecontrol equipment is rolling disc, displacement disc or rotary drum.
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| CN 200810067702 CN101600120B (en) | 2008-06-04 | 2008-06-04 | Method and device for displaying image by reducing power consumption |
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| CN 200810067702 CN101600120B (en) | 2008-06-04 | 2008-06-04 | Method and device for displaying image by reducing power consumption |
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