CN102377969A - Optical drive circuit based on DLP image processing chip and input signal management method thereof - Google Patents
Optical drive circuit based on DLP image processing chip and input signal management method thereof Download PDFInfo
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- CN102377969A CN102377969A CN2010102569004A CN201010256900A CN102377969A CN 102377969 A CN102377969 A CN 102377969A CN 2010102569004 A CN2010102569004 A CN 2010102569004A CN 201010256900 A CN201010256900 A CN 201010256900A CN 102377969 A CN102377969 A CN 102377969A
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Abstract
The invention provides an optical drive circuit based on a DLP image processing chip and an input signal management method thereof. The optical drive circuit comprises the following parts: a main controller for master control image processing; a DMD digital micromirror device as a final link of completing digital visual information display; a DMD reset auxiliary element which is responsible for DMD chip reset in an image processing process; a voltage/control signal generation apparatus which provides work voltage and sends a control signal; a set of video input acquisition and processing interfaces used for acquiring and processing an external signal source; a set of communication interfaces which is responsible for communicating with an external device or splicing other optical devices in a system. The invention provides the input signal management method applied to the optical drive circuit based on the DLP image processing chip, through the method, effective management is carried out on an input signal source. According to the optical drive circuit and the method in the invention, good performance of a projector is maintained and cost is reduced simultaneously.
Description
Technical field
The present invention relates to a kind of ray machine drive circuit and employing and be applied in the input signal management method on this circuit, belong to the digital projection equipment technical field based on the DLP picture processing chip.
Background technology
DLP is a kind of digital shadow casting technique by TIX's development; It has adopted innovative projection and display message method; Be the basis with a kind of microcomputer electric component; Be called digital microreflection element (Digital Micromirror Device DMD), accomplish the final link of display digit visual information.And DLP projector is widely used in every field; Especially the application advantage of DLP ray machine is outstanding especially in rear-projection splicing large screen display system; Bringing into play huge advantage in military commanding, city emergency, public security traffic, hydraulic and electric engineering, Aero-Space, video conference and monitoring field, the image information of high definition, high-contrast, high brightness all can be provided.
At present, the subject matter of DLP ray machine is how on the superperformance basis that keeps projector, to reduce cost as much as possible, thus with the competition of LCD and LCOS projector in win victory.And in the DLP ray machine cost the highest be the ray machine drive circuit, the cost that therefore how to reduce the ray machine drive circuit has just become urgent problem.
Summary of the invention
The purpose of this invention is to provide ray machine drive circuit and input signal management method that a kind of superperformance that keeps projector reduces cost simultaneously.
In order to achieve the above object, a technical scheme of the present invention has provided a kind of ray machine drive circuit based on the DLP picture processing chip, it is characterized in that, comprising:
A master controller is as the master control image processing;
A DMD digital micro-mirror device is as the final link of accomplishing the display digit visual information;
DMD auxiliary element that resets, the dmd chip of being responsible in image processing process resets;
A voltage/control signal generating means provides operating voltage and sends control signal;
One group of video input is gathered and Processing Interface, in order to gather and to handle outside source;
One group communication interface is responsible for communicating or interior other Photomechanical equipments of splicing system with external equipment.
Another technical scheme of the present invention has provided and a kind ofly it is characterized in that based on the input signal management method on the ray machine drive circuit of above-mentioned DLP picture processing chip step is:
Step 1, master controller gather with the Processing Interface search through the video input whether the signal source input is arranged, if detected synchronizing signal, then get into next step;
Step 2, the master controller form in source are to the received signal retrieved, and get into next step if can confirm after the form of this signal source then locks this signal source;
Step 3, the signal source that receives as if master controller are that picture signal is then undertaken getting into next step behind frequency and the phase optimization by master controller, if vision signal then directly gets into next step;
Thereby step 4, calculate the initial row and initial locations of pixels realization framing in current demand signal source by master controller;
Step 5, master controller continue signal source is kept watch on, and then get into step 1 if the current demand signal source changes, if the change of format in current demand signal source then gets into step 2.
Advantage of the present invention is: utilize the integrated DLP picture processing chip DDP2230 of system of the up-to-date height of TI company; Increase less, peripheral chip cheaply, realize the drive circuit of the ray machine that a cover is complete, not only when design circuit, controlled the cost of circuit well; And show up-to-date " ultimate attainment color " technology; Function admirable has a extensive future, and has provided a kind of method simple to operate and reference is provided for from now on projector's design of drive circuit simultaneously.
Description of drawings
Fig. 1 is a kind of ray machine drive circuit sketch map based on the DLP picture processing chip provided by the invention;
Fig. 2 is the flow chart of input signal management method of the present invention.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
As shown in Figure 1, be a kind of ray machine drive circuit provided by the invention based on the DLP picture processing chip, comprising:
A DMD digital micro-mirror device is to accomplish the final link of display digit visual information;
The auxiliary element that resets, the dmd chip of being responsible in image processing process resets;
A voltage/control signal generating means provides the control signal of operating voltage and devices such as bulb, colour wheel;
A video input interface is in order to gather, to handle outside source;
A communication interface is responsible for and the communicating by letter of external equipment or interior other Photomechanical equipments of splicing system;
Master controller as the image processing core cell, is selected the up-to-date DDP2230 picture processing chip of TI company for use.It has two input ports; Support digital YUV or rgb signal form and BT656 form respectively; Built-in ARM926 microprocessor, internal support carry out processing capacities such as dynamic scaling, interlacing become line by line, frame rate conversion, color gamut space conversion to vision signal, support color, color saturation, brightness, the definition of image are regulated arbitrarily; Support functions such as unique dynamic black compensation, ultimate attainment color, keystone, and built-in OSD engine.
The DMD digital micro-mirror device is the terminal of realizing digital picture, and the present invention selects for use and uses the most general 0.7 inch, 1024 * 768 dmd chip on the present market; It can realize 1024 * 768 resolution, and the present invention is not restricted to this dimension D MD chip, and is suitable equally to chips such as 0.45 720P and 0.95 inches.
The auxiliary element that resets is responsible for DMD is resetted, and selects the DAD1000 chip of TI for use.
Voltage the control signal generating means, be responsible for providing the control signal of operating voltage and ray machine parts such as bulb, colour wheel etc., select the PMD1000 chip of TI for use.
Video input interface is responsible for gathering, handling outside source, selects the TVP5146 chip of TI for use.
More than each chip form TI DLP chipset with master controller, accomplish whole process to signal processing.
Communication interface is RS232, RS485 interface, accomplish external client to the control and the articulating between other ray machines of ray machine itself and splicing system of ray machine, communicate by letter etc.
The process that picture signal gets into master control chip rear video signal processing is following:
At first, carry out front-end processing, comprise that chrominance space conversion, noise reduction and interlacing change wait line by line;
Secondly, carry out frame rate conversion, input signal is unified into a kind of frame per second;
Then, picture quality is improved color enhancing, tone adjustment etc.;
At last, carry out convergent-divergent and handle, the resolution of input picture is scaled to the laggard control chip format converting module of becoming owner of of resolution of DMD; This module is a DLP chip functions peculiar module, is responsible for specially the form of image format conversion for supporting that DMD shows, utilizes ultimate attainment color, and technology such as dynamic black compensation are carried out final optimization pass to image.
As shown in Figure 2, it is a kind of based on the input signal management method on the ray machine drive circuit of above-mentioned DLP picture processing chip that the present invention also provides, the input signal of search dedicated tunnel that this method comprises following power function: signal search----; Format detection----is differentiated current input signal form and standard; Frequency and phase place adjustment----are carried out frequency and phase optimization to picture signal, and vision signal is not directly through processing; Current input signal initial row and initial locations of pixels are calculated in automated graphics location----; The state of current input signal is kept watch in supervisory signal source----.
In the method, relevant incident has: the signal format that signal format changes----input changes, but the signal source of input does not change; The signal source that signal source changes----input changes; Detect the synchronizing signal that synchronizing signal----detects input signal; Confirm the locking of signal format and locking signal----input signal source, the format identification success; No signal/can't confirm form----can't detect signal can't confirm that maybe signal format just returns search again or detect.
The concrete steps of a kind of input signal management method provided by the invention are:
Step 1, master controller gather with the Processing Interface search through the video input whether the signal source input is arranged, if detected synchronizing signal, then get into next step;
Step 2, the master controller form in source are to the received signal retrieved, and get into next step if can confirm after the form of this signal source then locks this signal source;
Step 3, the signal source that receives as if master controller are that picture signal is then undertaken getting into next step behind frequency and the phase optimization by master controller, if vision signal then directly gets into next step;
Thereby step 4, calculate the initial row and initial locations of pixels realization framing in current demand signal source by master controller;
Step 5, master controller continue signal source is kept watch on, and then get into step 1 if the current demand signal source changes, if the change of format in current demand signal source then gets into step 2.
Claims (8)
1. the ray machine drive circuit based on the DLP picture processing chip is characterized in that, comprising:
A master controller is as the master control image processing;
A DMD digital micro-mirror device is as the final link of accomplishing the display digit visual information;
DMD auxiliary element that resets, the dmd chip of being responsible in image processing process resets;
A voltage/control signal generating means provides operating voltage and sends control signal;
One group of video input is gathered and Processing Interface, in order to gather and to handle outside source;
One group communication interface is responsible for communicating or interior other Photomechanical equipments of splicing system with external equipment.
2. a kind of ray machine drive circuit based on the DLP picture processing chip as claimed in claim 1 is characterized in that said master controller is selected the DDP2230 System on Chip/SoC of TI for use.
3. a kind of ray machine drive circuit as claimed in claim 1 based on the DLP picture processing chip; It is characterized in that; It is 1024 * 768 dmd chip that described DMD digital micro-mirror device is selected 0.7 inch, resolution for use; Or select 0.45 inch dmd chip for use, or select 0.55 inch dmd chip for use, or select 0.95 inch chip of high definition for use.
4. a kind of ray machine drive circuit based on the DLP picture processing chip as claimed in claim 1 is characterized in that, the said DMD auxiliary element that resets is selected the DAD1000 chip of TI for use.
5. a kind of ray machine drive circuit based on the DLP picture processing chip as claimed in claim 1 is characterized in that said voltage/control signal generating means is selected the PMD1000 chip of TI for use.
6. a kind of ray machine drive circuit based on the DLP picture processing chip as claimed in claim 1 is characterized in that, the TVP5146 chip of selecting TI with Processing Interface for use is gathered in said video input.
7. a kind of ray machine drive circuit based on the DLP picture processing chip as claimed in claim 1 is characterized in that said communication interface is RS232 or RS485 interface.
8. one kind is applied in that claim 1 is said to is characterized in that based on the input signal management method on the ray machine drive circuit of DLP picture processing chip step is:
Step 1, master controller gather with the Processing Interface search through the video input whether the signal source input is arranged, if detected synchronizing signal, then get into next step;
Step 2, the master controller form in source are to the received signal retrieved, and get into next step if can confirm after the form of this signal source then locks this signal source;
Step 3, the signal source that receives as if master controller are that picture signal is then undertaken getting into next step behind frequency and the phase optimization by master controller, if vision signal then directly gets into next step;
Thereby step 4, calculate the initial row and initial locations of pixels realization framing in current demand signal source by master controller;
Step 5, master controller continue signal source is kept watch on, and then get into step 1 if the current demand signal source changes, if the change of format in current demand signal source then gets into step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102569004A CN102377969A (en) | 2010-08-19 | 2010-08-19 | Optical drive circuit based on DLP image processing chip and input signal management method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102569004A CN102377969A (en) | 2010-08-19 | 2010-08-19 | Optical drive circuit based on DLP image processing chip and input signal management method thereof |
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| CN102377969A true CN102377969A (en) | 2012-03-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982364A (en) * | 2017-03-16 | 2017-07-25 | 天津通信广播集团有限公司 | Laser television ray machine control system based on AML T866SOC chips |
| CN108234976A (en) * | 2017-12-29 | 2018-06-29 | 花花猫显示科技有限公司 | Support the DLP Projection Display drive systems of a variety of laser light sources |
| CN108725199A (en) * | 2017-04-21 | 2018-11-02 | 中车株洲电力机车研究所有限公司 | A kind of display system, method and application based on speech control |
-
2010
- 2010-08-19 CN CN2010102569004A patent/CN102377969A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106982364A (en) * | 2017-03-16 | 2017-07-25 | 天津通信广播集团有限公司 | Laser television ray machine control system based on AML T866SOC chips |
| CN108725199A (en) * | 2017-04-21 | 2018-11-02 | 中车株洲电力机车研究所有限公司 | A kind of display system, method and application based on speech control |
| CN108234976A (en) * | 2017-12-29 | 2018-06-29 | 花花猫显示科技有限公司 | Support the DLP Projection Display drive systems of a variety of laser light sources |
| CN108234976B (en) * | 2017-12-29 | 2021-07-27 | 河南宏昌科技有限公司 | DLP projection display driving system supporting various laser light sources |
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Application publication date: 20120314 |