CN103716604A - Projection-type image display having color wheel index function and automatic adjusting method - Google Patents
Projection-type image display having color wheel index function and automatic adjusting method Download PDFInfo
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- CN103716604A CN103716604A CN201310632726.2A CN201310632726A CN103716604A CN 103716604 A CN103716604 A CN 103716604A CN 201310632726 A CN201310632726 A CN 201310632726A CN 103716604 A CN103716604 A CN 103716604A
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Abstract
The invention discloses a projection-type image display having a color wheel index function. The projection-type image display comprises at least one detector arranged in the upper or lower part of a screen and used for converting optical signals into electric signals and outputting the electric signals after detecting a test image projected onto the screen; an analog digital (A/D) converting part used for converting the analog electric signals outputted from the detector into digital electric signals and then outputting the digital electric signals; and a micro-processor used for transforming an image signal phase corresponding to the test image projected onto the screen and for memorizing and storing an image signal phase value corresponding to a brightness change staring place of the test image by taking the digital electric signals inputted by the analog digital (A/D) converting part as the basis. According to the invention, the color wheel index adjustment can be conducted automatically in the image display itself so that the adjustment time can be shortened and the production rate and quality management efficiency can be increased.
Description
Technical field
The present invention relates to colour circle index (color wheel index) adjustment, relate in particular to a kind of porjection type image display and automatic adjusting method thereof with colour circle index function.
Background technology
Recently, along with the development of information industry, more and more higher to showing the demand of image display of large picture image.As the image display that can show large-scale large image, there is porjection type (projection) image display.Wherein, { DLP (Digital " ghtProcessing) } projecting apparatus is subject to attracting attention of people in recent years to utilize the digital light of digital micro-mirror { DMD (DigitalMicro-mirrorDevice) } device to process.
In recent years, the miniaturization of projecting apparatus with and lightweight become the development trend of projecting apparatus.In order to adapt with this trend, utilize a digital micro-mirror (DMD) device to realize color, conventionally use by the time red (R), green (G), blue (B) separated colour circle (col.r?wheel)。
Fig. 1 is that traditional digital light is processed (DLP) projecting apparatus pie graph.
With reference to Fig. 1, by ballast 70, driven the white light of lamp source 10 transmittings, by the colour circle 20 with regulation speed (as 120Hz) rotation, by the time, be separated into red (R), green (G), blue (B).Red (R) after separation, green (G), blue (B) incide digital micro-mirror (DMD) device 30.Then, in digital micro-mirror (DMD) device 30, with projection lens or absorber of light (there is no in the drawings picture), after optionally reflecting, on screen 80, form image.In digital micro-mirror (DMD) device 30, be provided with the state according to basic unit of storage, many micro-reflectors of the 16 ware m that the light of incident can be projected by projection lens or absorber of light.And micro-reflector is when each filter color { red (R), green (G), blue (B) } of conversion colour circle, in the time of interlock to the changing of the directional selectivity of incident light, thereby realize the color combination of wishing.
In addition, for each filter change color of the colour circle 20 that links and the action of DMD device, look entangles; 20 not only locking (10cking) be certain rotary speed, and, the change color phase place producing by colour circle 20 (or regularly) must be realized and being synchronizeed with red (R), green (G), indigo plant (B) picture signal of offering digital micro-mirror (DMD) device 30.If change color phase place is asynchronous with picture signal phase place, project image on screen, or colorific variation or generation flicker (flicker) phenomenon in image.
For this reason, in the center drum portion of colour circle 20, regulation form index sign (indexmark) 50 that shows colour circle rotation benchmark (reference) place is set, Here it is so-called " colour circle index ".And, at the index with arranging, identify the parallel case that moved in 50 positions and put-die photodetector 52 is set conventionally.And the index sign 50 of photodetector 52 when detecting colour circle 20 rotation sends microprocessor 60 to: microprocessor 60 will be controlled motor driven portion 40 simultaneously, for colour circle 20 is rotated with the speed of one-Ding, its speed be locked.
Because identifying 50 positions, index is set to the datum mark based on colour circle rotation, therefore, and the change color phase place producing while deciding by colour circle 20 according to index home position.And, when making digital light processing (DLP) projecting apparatus, according to the index arranging, identify the change color phase place that 50 assigned positions (as demarcating of red (R) look section and green (G) look section) decide and be input to the red of digital micro-mirror (DMD) device 30: (R), green (G), blue (B) picture signal, to these two kinds of signals, must be arranged to synchronously still, traditional method is that index sign 50 is attached on the assigned position of colour circle 20 by manual methods by operator, so its attachment position likely produces---fixed deviation.
Therefore, when product export, to the change color phase place being produced by the deviation of attachment position and red (R), green (G), indigo plant (B) picture signal of being input to digital micro-mirror (DMD) device 30, need to carry out the adjustment operation (being called below " adjustment of colour circle index ") to the phase difference of these two kinds of signals.This colour circle index adjust operation be operator to projecting the image on screen, adopt naked eyes to detect the adjustment modes of recognition image state, this pattern is all adjusted by manual method all products.
Thisly all products are carried out to colour circle index by manual methods to adjust operation be a kind of operation of non-efficiency, this operation is because the naked eyes according to people carry out, and therefore exists and reduces the problem of adjusting correctness.This problem becomes the reason that reduces the non-validity of productivity ratio and quality management when large-tonnage product is produced.
Summary of the invention
The present invention provides a kind of image display and automatic adjusting method thereof that function adjusted in colour circle index that have in order to solve the problem of above-mentioned existence, its objective is that the strop of checking colors draws adjustment operation a kind of image display and the method thereof that can automatically carry out is provided.
And another object of the present invention is in the situation that not needing external equipment, utilize the algorithm that is applicable to product self, the strop of checking colors draws adjustment operation provides the image display that can carry out automatically to adjust.
For addressing the above problem, technical scheme provided by the invention is:
Having colour circle index, to adjust the image display of function be to consist of following part: being arranged on screen top or bottom, and after detecting and projecting the test pattern on screen, is at least one detector of exporting after the signal of telecommunication by converting optical signals; From the analog electrical signal of detector output, be transformed to analog digital (A/D) transformation component of exporting after digital electric signal: conversion is corresponding to the picture signal phase place that projects the test pattern screen, and using from the digital electric signal of analog digital (A/D) transformation component input as basis, the picture signal phase value that the brightness corresponding to test pattern is started to change place carries out the microprocessor of memory storage; : comprise the storage part to the default Value Data of picture signal phase place; And microprocessor is usingd default Value Data as basis, output is corresponding to the picture signal of test pattern.
The automatic adjusting method with the image display of automatic chromatic circle index adjustment is to consist of the following stage: (a) using the default Value Data stipulated as basis, the image of test is carried out to ejection stage to screen; (b) the picture signal phase place corresponding to test pattern is carried out to changes phase: (c), from the signal of the 1st photodetector input that is arranged on screen top or bottom as basis, the brightness of test pattern is carried out to detection-phase; (d) if detecting the brightness of test pattern changes, the picture signal phase value corresponding to brightness variation beginning place carries out memory stage; : (e) from the signal of the 2nd photodetector input that is arranged on screen top or bottom as basis, the brightness of test pattern is changed and carries out detection-phase: if (f) detect the brightness of test pattern, change, the picture signal phase value that change to start place corresponding to brightness carries out memory stage: (g), the mean value of above-mentioned (d) stage and the picture signal phase value (f) remembered in the stage, convert to picture signal phase value and carry out memory stage.
Beneficial effect of the present invention: can carry out automatically because colour circle index is adjusted in image display self, therefore can shorten the adjustment time, boost productivity and quality management efficiency.And because colour circle index adjustment operation can be carried out automatically, the pattern of therefore adjusting with traditional dependence naked eyes is compared, and can improve adjustment correctness and the raising of product quality made to contribution simultaneously.
Accompanying drawing explanation
Fig. 1 is the pie graph of conventional digital optical processing projector.
Fig. 2 is that the present invention has digital light processing (DLP) projecting apparatus pie graph that function adjusted in colour circle index.
Fig. 3 is the automatic colour circle index adjustment algorithm flow chart that digital light is processed (DLP) projecting apparatus according to the present invention.
Symbol description to the major part of accompanying drawing:
10: lamp source: 20: colour circle: 30: digital micro-mirror (DMD) device; 40: motor driven portion: 50: index sign: 52: photodetector: 70: ballast: 80: screen: 110: upper detection device: 112: bottom detector: 120: analog digital (A/D) converter; 130: microprocessor: 140: storage part.
Embodiment
Below, with reference to accompanying drawing, representative instance of the present invention is described in more detail.
Fig. 2 is that the present invention has digital light processing (DLP) projecting apparatus pie graph that function adjusted in colour circle index.
With reference to Fig. 2, in the digital light shown in Fig. 1, processing (DLP) projecting apparatus is that mountain following part forms: the top and the lower central position that are configured in separately screen 80, and detect when projecting the test pattern on screen, 2 detectors (110,112) that are the signal of telecommunication by converting optical signals; From the analog electrical signal of detector output, be transformed to analog digital (A/D) transformation component 120 of digital signal: the whole system of digital light being processed to (DLP) projecting apparatus is controlled, and carries out the microprocessor 130 of the automatic adjustment algorithm of colour circle index: colour circle index is adjusted to the storage part 140 that required default Value Data and test pattern data are stored automatically.
The basic functional principle of the digital light of above-mentioned formation being processed to (DLP) projecting apparatus is described as follows: Fig. 3 is the automatic colour circle index adjustment algorithm flow chart that digital light is processed (DLP) projecting apparatus according to the present invention.
With reference to Fig. 3, digital light is processed (DLP) projecting apparatus after driven, responds to from the regulation input command of remote controller or operation panel input, and microprocessor 130 will start automatic colour circle index and adjust operation (stage 10).
First, microprocessor 130 will be read regulation default value (default) data (stage 12) of prior storage from storage part 140.Here, so-called default Value Data is for index sign 50 being attached to the bottom of normal position (as demarcating of red (R) look section and green (G) look section), and red (R), green (G) that design of the change color Phase synchronization forming when by colour circle 20, the phase data of blue (B) picture signal.Utilizing the reason of default value (default) data of storage in advance here, is when adjusting, to minimize variation to shorten as far as possible the adjustment time for making.
Secondly, microprocessor 130 will be usingd default Value Data as basis, test pattern will be carried out the demonstration stage on screen 80.Now, test pattern is monochrome image preferably, and red (R) color image is best.This is because compare with other colors, and red (R) look detects and is easier in test section (110,120), and particularly the brightness of red (R) color image more easily detects.
Secondly, red (R) look test pattern showing on screen is as benchmark, and microprocessor 130 is input to change the picture signal phase place (stage 16) of digital micro-mirror (DMD) device 30.Whether the detector (hereinafter referred to as upper detection device) 110 that now, is arranged on screen 80 tops will change and confirm (stage 18) projecting test pattern brightness on screen.If confirm as test pattern brightness, do not change (in the stage 18, "No"), will repeatedly carry out stage 16 and stage 18.
If do not having brightness to change in certain interval, once but occur the starting point that brightness changes (in the stage 18, "), microprocessor 130 changes recall tests image brightness the picture signal phase value of starting point and stores (stage 20).
Secondly, to being arranged on the detector (hereinafter referred to as bottom detector) 112 of screen bottom, also carry out same steps again.That is, microprocessor 130 changes (stage 22) again by the picture signal phase place that is input to digital micro-mirror (DMD) device 30.
Now, whether screen 80 bottom detectors 112 will change and confirm (stage 24) projecting test pattern brightness on screen.If confirmed as, do not have test pattern brightness to change (in the stage 24, "No"), repeatedly carry out stage 22 and stage 24.
If test pattern brightness starts to change (in the stage 24, "Yes"), to storing (stage 26) after the picture signal phase value memory of starting point.
Again secondly, calculation stages 20 and the average of the phase value of storage in the stage 26, and adjust (stage 28) with final picture signal phase value.All finish thus current step.
As above-mentioned, work to upper detection device 110 and bottom detector 112, what distinguish setting is because in colour circle feature, if change color phase place and the vertical image synchronizing signal based on colour circle rotation, under the state of locking, change the phase place of picture signal (that is, red (R), green (G), blue (B) picture signal), along with the increase and decrease of phase place, on screen, shown test pattern brightness changes starts to occur that position is different, therefore adopts to distinguish and sets.For example, if picture signal phase place increases, from the top of screen, the brightness that produces test pattern is changed; If picture signal phase place reduces, from the bottom of screen, the brightness that produces test pattern is changed.Start the position that occurs that brightness changes, can change according to colour circle direction of rotation, red (R), green (G) on colour circle, the configuration sequence of blue (B) color segment etc. the position of starting point.And, with the mean value of two phase values obtaining from upper detection device 110 and bottom detector 112 come final compensating image signals phase place be for compensate to greatest extent as digital light process (DLP) projecting apparatus and colour circle the surrounding enviroment such as variations in temperature variation and because the long-term deteriorated deviation based on colour circle causing of using is carried out picture signal phase compensation.
In addition, although 2 detectors are in this example arranged on screen top and lower central position, if the worker of this area, to the number of detector and position thereof can change be hold intelligible.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection range of technical solution of the present invention.
Claims (2)
1. the porjection type image display with colour circle index function, it is characterized in that being formed by following part: be arranged on screen top or bottom, and detect project screen-on test pattern after, by converting optical signals, be at least one detector of exporting after the signal of telecommunication; From the analog electrical signal of detector output, be transformed to analog digital (A/D) transformation component of exporting after digital electric signal; Conversion is corresponding to the picture signal phase place that projects the test pattern on screen, and using from the digital electric signal of analog digital (A/D) transformation component input as basis, the picture signal phase value that the brightness corresponding to test pattern is started to change place carries out the microprocessor of memory storage; A storage part comprising the default Value Data of picture signal phase place; And microprocessor is usingd default Value Data as basis, output is the projection-type image display apparatus with automatic chromatic circle index adjustment as its feature corresponding to the picture signal of test pattern.
2. the automatic adjusting method with the porjection type image display of colour circle index function according to claim 1, is characterized in that, comprises with the next stage:
(a) using the default Value Data stipulated as basis, the image of test is carried out to ejection stage to screen;
(b) the picture signal phase place corresponding to test pattern is carried out to changes phase:
(c) from the signal of the 1st photodetector input that is arranged on screen top or bottom as basis, the brightness of test pattern is changed and carries out detection-phase;
(d) if detecting the brightness of test pattern changes, the picture signal phase value corresponding to brightness variation beginning place carries out memory stage;
(e) from the signal of the 2nd photodetector input that is arranged on screen top or bottom as basis, the brightness of test pattern is changed and carries out detection-phase;
(f) if detecting the brightness of test pattern changes, the picture signal phase value corresponding to brightness variation beginning place carries out memory stage;
(g) the mean value of above-mentioned (d) stage and the picture signal phase value (f) remembered in the stage, convert to picture signal phase value and carry out memory stage.
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| CN201310632726.2A CN103716604A (en) | 2013-11-29 | 2013-11-29 | Projection-type image display having color wheel index function and automatic adjusting method |
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| CN201310632726.2A CN103716604A (en) | 2013-11-29 | 2013-11-29 | Projection-type image display having color wheel index function and automatic adjusting method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6738104B2 (en) * | 2000-02-25 | 2004-05-18 | Texas Instruments Incorporated | Robust color wheel phase error method for improved channel change re-lock performance |
| CN1809172A (en) * | 2005-01-19 | 2006-07-26 | 乐金电子（沈阳）有限公司 | Image display device with automatic chromatic circle index adjustment method and its adjusting method |
| CN1882102A (en) * | 2005-06-14 | 2006-12-20 | 乐金电子（沈阳）有限公司 | Color error compensating method and device according to temperature |
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2013
- 2013-11-29 CN CN201310632726.2A patent/CN103716604A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6738104B2 (en) * | 2000-02-25 | 2004-05-18 | Texas Instruments Incorporated | Robust color wheel phase error method for improved channel change re-lock performance |
| CN1809172A (en) * | 2005-01-19 | 2006-07-26 | 乐金电子（沈阳）有限公司 | Image display device with automatic chromatic circle index adjustment method and its adjusting method |
| CN1882102A (en) * | 2005-06-14 | 2006-12-20 | 乐金电子（沈阳）有限公司 | Color error compensating method and device according to temperature |
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Application publication date: 20140409 |