CN109194941A - DLP projector - Google Patents
DLP projector Download PDFInfo
- Publication number
- CN109194941A CN109194941A CN201811325957.8A CN201811325957A CN109194941A CN 109194941 A CN109194941 A CN 109194941A CN 201811325957 A CN201811325957 A CN 201811325957A CN 109194941 A CN109194941 A CN 109194941A
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- CN
- China
- Prior art keywords
- signal
- controller
- light source
- phase
- mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3164—Modulator illumination systems using multiple light sources
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The present invention relates to field of projector, disclose a kind of DLP projector, and the fatigue of the mechanical structure to the micro mirror hinge that slows down reduces the decreasing failure rate of complete product.The present invention includes image processor, DLP controller, digital micro-mirror, light source, light source drive, elimination of hidden device, phase controller and digital micro-mirror reset controller；The phase synchronized signal that the phase controller is used to be generated according to DLP controller is to elimination of hidden device input phase compared with positive signal；The elimination of hidden device is used to receive row field blanking signal from image processor, frequency multiplication is carried out to row field blanking signal and processing is synchronized compared with positive signal according to the phase that phase controller inputs, and synchronization signal is sent into digital micro-mirror reset controller generation reset signal by treated, the reset signal is for making digital micro-mirror reset state.The present invention is suitable for laser DLP projector.
Description
Technical field
The present invention relates to field of projector, in particular to DLP projector.
Background technique
The laser projection of DLP (Digital Light Processing) technology is used at present, using DMD (number
Micro mirror) it is used as core display device, DMD is the product of American TI Company, its working principle is that using semiconductor technology in silicon substrate
On piece has accumulated (how much depending on display pixel) a micro mirrors (micron order) up to a million, and each micro mirror utilizes the structure of hinge-like
It is overturn, there are three types of states for micro mirror, and most at present has+17 °, -17 ° and 0 °, and 0 ° is free state, i.e. hinge does not stress
State.
In order to show that image, control signal then pass through CMOSRAM electrode progress " switch control ", i.e. white and black displays, in order to
It shows different color, the unit time is needed to be split, project the light source (using colour wheel) of different color respectively, utilize people
Eye eye storage characteristic is mixed into colour, while every frame monochrome image is carried out multistage display, to control chroma-luminance.This its
In all be unable to do without DMD micro mirror overturning many times, due to optical design, DMD always work at switch state (in order to
Contrast requirement), i.e., hinge is always to be in stress, and the micro mirror of only power-off DMD, which can just be in free state, to carry out " not
Breath ".The service life of chip, due to the mechanical structure of itself hinge, there is also tired other than the normal voltage and current limitation of semiconductor
The problem of labor, when overturning number is more than enough, fatigue is aggravated, light radiation and heat sink strip itself inside especially high lumen projection machine
The limitation of part can accelerate the fatigue of hinge, cause the irreversible overturning of micro mirror hinge that failure is caused to generate.
Summary of the invention
The technical problem to be solved by the present invention is a kind of DLP projector is provided, the mechanical structure to the micro mirror hinge that slows down
Fatigue, reduce the decreasing failure rate of complete product.
To solve the above problems, the technical solution adopted by the present invention is that: DLP projector, including image processor, DLP control
Device, digital micro-mirror (DMD), light source, light source drive, elimination of hidden device, phase controller and digital micro-mirror processed reset control
Device；
The phase synchronized signal that the phase controller is used to be generated according to DLP controller is to elimination of hidden device input phase
Compared with positive signal；
The elimination of hidden device is used to receive row field blanking signal from image processor, carries out frequency multiplication to row field blanking signal
And processing is synchronized compared with positive signal according to the phase of phase controller input, and synchronization signal is sent into number by treated
Micro mirror reset controller generates reset signal, and the reset signal is for making digital micro-mirror be in reset state, i.e. micro mirror hinge not
The state of stress.
Further, synchronization signal can be sent into simultaneously phase controller and light source drive, light by the elimination of hidden device
Source drive after the synchronization signal for receiving the input of elimination of hidden device, close during picture blanking by control light source.In this way
DMD can be not only set to reflect extra light due to being in free state in blanking interval and enter camera lens influence projected contrast,
It can also make in free state, reduce light and irradiate DMD bring heat, improve reliability.
For the display effect reached, guarantees that DMD is incident on micro mirror without light in reset period (free state phase), need
The light source shut-in time is slightly larger than the resetting time of digital micro-mirror；It is simultaneously the completion for guaranteeing image, the DMD free state period is also wanted
Less than the picture blanking period.Therefore when the time that light source drive control light source is closed in the present invention is greater than the reset of digital micro-mirror
Between, but it is less than the picture blanking period.
Further, the light source is not limited to laser light source, can also be the mixing light source of LED and laser composition.
The field blanking interval the beneficial effects of the present invention are: present invention during image processing, is expert at is implemented to DMD's
Operation is resetted, makes the working life for being greatly improved display device dmd chip, reduces the decreasing failure rate of complete product.
Detailed description of the invention
Fig. 1 is the structural block diagram of the embodiment of the present invention.
Specific embodiment
DMC overturning number in order to solve the problems, such as DLP projector is more than enough, tired aggravation, and the invention discloses a kind of DLP
Projector, field blanking interval of being expert at carry out DMD and reset operation, to reduce the decreasing failure rate of complete product.Specifically,
The present invention may include image processor, DLP controller, digital micro-mirror (DMD), light source, light source drive, elimination of hidden device, phase
Level controller and digital micro-mirror reset controller；
Wherein:
Image processor (DSP) can be to the video signal decoding of input, while can demodulate corresponding row field blanking letter
Number.
The digital video signal of image processor decoded output is sent into DLP controller and carries out DMD display control, DLP control
Device needs output phase synchronization signal simultaneously.
The phase synchronized signal that phase controller is used to be generated according to DLP controller is to elimination of hidden device input phase calibration
Signal.
Elimination of hidden device be used for from image processor receive row field blanking signal, to row field blanking signal carry out frequency multiplication and
Processing is synchronized compared with positive signal according to the phase of phase controller input, and synchronization signal is sent into digital micro-mirror by treated
Reset controller generates reset signal, and the reset signal is for making digital micro-mirror reset state (free state), i.e. micro mirror hinge
Unstressed state.Because of the reason of DLP display mode, the digital video signal of image processor decoded output is being sent into DLP
After controller, generally frequency multiplication is to one times or more, to guarantee that it is synchronous that the row field blanking signal of elimination of hidden device is shown with DMD,
The present invention needs to carry out corresponding process of frequency multiplication to row field blanking signal.
For the display effect reached, guarantees that DMD is incident on micro mirror without light in reset period (free state phase), need
The light source shut-in time is slightly larger than resetting time；It is simultaneously the completion for guaranteeing image, the DMD free state period is also less than image and disappears
Implicit cycle.Therefore the time that light source drive control light source is closed in the present invention is greater than the resetting time of digital micro-mirror, but is less than
The picture blanking period.
Further, the synchronization signal after synchronization process can be sent into simultaneously phase controller and light by the elimination of hidden device
Source drive, light source drive control light source in the picture blanking phase after the synchronization signal for receiving the input of elimination of hidden device
Between close.DMD can be not only set to reflect extra light due to being in free state in blanking interval and enter camera lens influence in this way
Projected contrast can also make in free state, reduce light and irradiate DMD bring heat, improve reliability.
The present invention will be further described by the following examples.
As shown in Figure 1, embodiment provides a kind of DLP projector, including image processor (DSP), DLP controller, number
Word micro mirror (DMD), laser light source, laser light source driver, elimination of hidden device, phase controller and digital micro-mirror reset control
Device.
Wherein: image processor DSP can be to the video signal decoding of input, while can demodulate corresponding row field blanking
Signal；The digital video signal of image processor decoded output is sent into DLP controller and carries out DMD display control, and DLP controller is same
When can be with output phase synchronization signal；Phase controller can be according to the phase synchronized signal that DLP controller generates to elimination of hidden
Device input phase is compared with positive signal；Elimination of hidden device can from image processor receive row field blanking signal, to row field blanking signal into
Row frequency multiplication and processing is synchronized compared with positive signal according to the phase of phase controller input, and by the synchronous letter after synchronization process
Number it is sent into digital micro-mirror reset controller and light source drive simultaneously；Digital micro-mirror reset controller receive synchronization signal it
After can produce reset signal, which can make digital micro-mirror reset state；Laser light source driver is receiving at blanking
After the synchronization signal for managing device input, controllable laser light source is closed during picture blanking.
Embodiment working principle is as follows: digital video signal passes through image processor (DSP), and being decoded as DLP controller needs
The vision signal wanted, while also separation trip field blanking signal；DLP controller is converted to control according to the vision signal of input
The Digital Signals DMD display device of DMD overturning performs image display；Row field blanking signal enter row field blanking processor into
Row frequency multiplication, while processing is synchronized compared with positive signal according to the phase that phase controller inputs, the synchronization signal after synchronization process
It is sent into digital micro-mirror reset controller and generates reset signal, reset signal makes digital micro-mirror be in reset under this signal function
State, i.e. micro mirror hinge unstressed state；The synchronization signal of elimination of hidden device output is input to laser light source driver, controls
Laser light source is closed during picture blanking, can not only DMD be made to reflect more in blanking interval due to being in free state in this way
Remaining light, which enters camera lens, influences projected contrast, can also make in free state, reduces light irradiation DMD bring heat
Amount improves reliability.
Claims (4)
1.DLP projector, including image processor, DLP controller, digital micro-mirror, light source and light source drive, feature exist
In further including elimination of hidden device, phase controller and digital micro-mirror reset controller；
The phase synchronized signal that the phase controller is used to be generated according to DLP controller is to elimination of hidden device input phase calibration
Signal；
The elimination of hidden device be used for from image processor receive row field blanking signal, to row field blanking signal carry out frequency multiplication and
Processing is synchronized compared with positive signal according to the phase of phase controller input, and synchronization signal is sent into digital micro-mirror by treated
Reset controller generates reset signal, and the reset signal is for making digital micro-mirror be in reset state.
2. DLP projector as described in claim 1, which is characterized in that synchronization signal is sent by the elimination of hidden device simultaneously
Phase controller and light source drive, light source drive control light after the synchronization signal for receiving the input of elimination of hidden device
Source is closed during picture blanking.
3. DLP projector as claimed in claim 2, which is characterized in that the time that light source drive control light source is closed is greater than
The resetting time of digital micro-mirror, but it is less than the picture blanking period.
4. DLP projector as described in claim 1, which is characterized in that the light source is laser light source or LED and laser
The mixing light source of composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325957.8A CN109194941A (en) | 2018-11-08 | 2018-11-08 | DLP projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325957.8A CN109194941A (en) | 2018-11-08 | 2018-11-08 | DLP projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109194941A true CN109194941A (en) | 2019-01-11 |
Family
ID=64938558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811325957.8A Pending CN109194941A (en) | 2018-11-08 | 2018-11-08 | DLP projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109194941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798188A (en) * | 2019-11-12 | 2020-02-14 | 四川长虹电器股份有限公司 | Device for automatically adjusting LD current turn-off delay of projector and control method |
Citations (5)
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|---|---|---|---|---|
| US20080055233A1 (en) * | 2006-08-31 | 2008-03-06 | Gigno Technology Co., Ltd. | Driving-control device and method of backlight module |
| US20110069060A1 (en) * | 2009-09-22 | 2011-03-24 | Macpherson James B | Method and system for digital light processing projection using pulsed lamps |
| CN102420954A (en) * | 2011-11-30 | 2012-04-18 | 深圳创维－Rgb电子有限公司 | Method for reducing power consumption of television and television |
| CN104735432A (en) * | 2015-03-09 | 2015-06-24 | 华东师范大学 | Digital micro-mirror phased interleave reset method |
| CN108346401A (en) * | 2018-03-05 | 2018-07-31 | 厦门理工学院 | A method of improving the DMD service life |
-
2018
- 2018-11-08 CN CN201811325957.8A patent/CN109194941A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080055233A1 (en) * | 2006-08-31 | 2008-03-06 | Gigno Technology Co., Ltd. | Driving-control device and method of backlight module |
| US20110069060A1 (en) * | 2009-09-22 | 2011-03-24 | Macpherson James B | Method and system for digital light processing projection using pulsed lamps |
| CN102420954A (en) * | 2011-11-30 | 2012-04-18 | 深圳创维－Rgb电子有限公司 | Method for reducing power consumption of television and television |
| CN104735432A (en) * | 2015-03-09 | 2015-06-24 | 华东师范大学 | Digital micro-mirror phased interleave reset method |
| CN108346401A (en) * | 2018-03-05 | 2018-07-31 | 厦门理工学院 | A method of improving the DMD service life |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798188A (en) * | 2019-11-12 | 2020-02-14 | 四川长虹电器股份有限公司 | Device for automatically adjusting LD current turn-off delay of projector and control method |
| CN110798188B (en) * | 2019-11-12 | 2021-06-22 | 四川长虹电器股份有限公司 | Device for automatically adjusting LD current turn-off delay of projector and control method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |