CN106896635A - A kind of laser drive current burr removes circuit and method - Google Patents
A kind of laser drive current burr removes circuit and method Download PDFInfo
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- CN106896635A CN106896635A CN201710173887.8A CN201710173887A CN106896635A CN 106896635 A CN106896635 A CN 106896635A CN 201710173887 A CN201710173887 A CN 201710173887A CN 106896635 A CN106896635 A CN 106896635A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/125—Discriminating pulses
- H03K5/1252—Suppression or limitation of noise or interference
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application discloses a kind of removal of laser drive current burr circuit and method, and laser projection display method in fact.The circuit includes：First not gate, its input is connected with the driving current output end of previous stage, and its output end is connected with the first input end of the first AND OR NOT gate；Second not gate, its input is used for input pulse control signal, and its output end is connected with the second input of first AND OR NOT gate, and is connected with the 4th input of the second AND OR NOT gate；First AND OR NOT gate, its 3rd input is connected with the output end of the second AND OR NOT gate, and its output end is connected with the first input end of the second AND OR NOT gate, and as the first output end of the electric current；Second AND OR NOT gate, its 3rd input is connected with the driving current output end of previous stage, and its output end is connected with the 3rd input of the first AND OR NOT gate, and as the second output end of the circuit.The circuit can eliminate current spikes can't extend the response time of driving current.
Description
Technical field
The application is related to technical field of laser display, more particularly to a kind of removal of laser drive current burr circuit and side
Method.
Background technology
RGB or RGBY laser projection display technologies be with high power red (R), green (G) and blue (B) driving current or it is red,
Green, Lan Hehuang (Y) driving current drives laser to send different colours laser, and one-wavelength laser is mixed into the display skill of full color
Art.So that RGBY laser projections show as an example, as shown in figure 1, R, G, B and Y color control electric current signal are by PWM (Pulse
Width Modulation, pulse width modulation) after be respectively connected to the input S1 to S4 of MUX, EN believes to enable
Number, A0, A1 and A2 are respectively RGBY gating signals, can by the switch of control selections S1 to the S4 passages of A0, A1 and A2, from
And the tunnel color control electric current signal of R, G, B, Y tetra- is synthesized the laser all the way comprising the color information of R, G, B, Y tetra- in a cycle and drive
Streaming current pulse signal, then from output end D outputs, to drive laser.
But, the pwm signal of R, G, B, Y can occur during the gating of MUX while holding or while what is closed shows
As (competition and risk phenomenon), the driving current burr for causing D ends to export is serious, influences the image quality of display.Prior art is solved
The way of driving current burr is to increase filter capacitor after MUX, and the output by filter capacitor to MUX is entered
Row filtering, it is this to smooth driving current, but because the smoothing effect of filter capacitor generally can not take into account high and low frequency two-stage
The effect that mode eliminates driving current burr is unsatisfactory, and the addition of electric capacity can extend response time of driving current.
The content of the invention
This application provides a kind of laser drive current burr removal circuit and method, to solve laser drive current
There is a problem of burr.
In a first aspect, this application provides a kind of laser drive current burr removal circuit, the circuit includes：
First not gate, the input of first not gate and the driving current output end of previous stage driving current output circuit
Connection, the output end of first not gate is connected with the first input end of the first AND OR NOT gate；
Second not gate, the input of second not gate is used for input pulse control signal, the output of second not gate
End is connected with the second input of first AND OR NOT gate, and is connected with the 4th input of the second AND OR NOT gate, and described the
The first input end of one AND OR NOT gate and the second input are same two inputs with door in first AND OR NOT gate；
First AND OR NOT gate, the 3rd input of first AND OR NOT gate connects with the output end of second AND OR NOT gate
Connect, the output end of first AND OR NOT gate is connected with the first input end of second AND OR NOT gate, and as the circuit
The first output end；
Second AND OR NOT gate, the 3rd input of second AND OR NOT gate and the drive of previous stage driving current output circuit
Streaming current output end is connected, and the output end of second AND OR NOT gate is connected with the 3rd input of first AND OR NOT gate,
And used as the second output end of the circuit, the 3rd input and the 4th input of second AND OR NOT gate are described second
Same two inputs with door in AND OR NOT gate.
Second aspect, present invention also provides a kind of laser drive current burr minimizing technology, methods described uses
On the one hand the laser drive current burr removal circuit described in, believes in the input of second not gate plus Pulse Width Control
Number, the cycle of the pulse control signal is the minimum pulse width 1/N of the driving current, and wherein N is the nature in addition to 0
Number.
The third aspect, present invention also provides a kind of laser projection display method, methods described is used described in second aspect
Laser drive current burr minimizing technology, and the lock in time of colour wheel in laser light projection display system is postponed into the pulse
1/2 cycle of control signal.
Fourth aspect, present invention also provides a kind of laser light projection display system, the system is included described in first aspect
Laser drive current burr removal circuit.
Laser drive current burr removal circuit provided herein, opens in a drive current signal period
Play latch during the beginning, make the size of an output upper cycle last drive current signal of holding of the circuit, so as to
The transient state burr of driving current is enough completely eliminated, and the circuit does not include electric capacity, with response efficiency higher.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the MUX exemplary plot of RGBY laser light projection display systems；
Fig. 2 is the circuit diagram that the application laser drive current burr removes circuit；
Fig. 3 is the operation principle exemplary plot that the application laser drive current burr removes circuit.
Specific embodiment
It is the circuit diagram of the application laser drive current burr removal circuit referring to Fig. 2.Laser drive current, example
It is the input of the circuit such as the driving current of RGBY MUXs output, burr elimination is carried out by the circuit, output is flat
Sliding driving current.As shown in figure 1, the circuit includes：
First not gate, input and the previous stage driving current output circuit such as RGBY multi-path choices of first not gate
Driving current output end (D ends) connection of device, the output end of first not gate is with the first input end of the first AND OR NOT gate 1.
Connection；
Second not gate, the input of second not gate is used for input pulse control signal CP, second not gate it is defeated
Go out end to be 2. connected with the second input of first AND OR NOT gate, and be 6. connected with the 4th input of the second AND OR NOT gate,
2. 1. the first input end of first AND OR NOT gate be same and door in first AND OR NOT gate with the second input
Two inputs；
First AND OR NOT gate, the 3rd input of first AND OR NOT gate 3. with the output end of second AND OR NOT gate
4. connection, the output end Q of first AND OR NOT gate is connected with the first input end of second AND OR NOT gate, and as described
First output end of electric current；
Second AND OR NOT gate, the 3rd input of second AND OR NOT gate 5. with previous stage driving current output circuit
Driving current output end is connected, the output end of second AND OR NOT gateWith the 3rd input of first AND OR NOT gate 3.
5. with the 4th input 6. connection, and as the second output end of the circuit, the 3rd input of second AND OR NOT gate
It is same two inputs with door in second AND OR NOT gate.
Wherein, AND OR NOT gate has four inputs, is divided into two groups, and the first input end of each AND OR NOT gate and second are input into
It is first group to hold, and the 3rd input and the 4th input are second group, first group be in AND OR NOT gate one it is defeated with two of door
Enter end, second group is another two input with door in the AND OR NOT gate.The no input of AND OR NOT gate, in the application
Using two AND OR NOT gates, the output end of the first AND OR NOT gate is positive output end Q, and the output end of the second AND OR NOT gate is anti-phase
Output end
When MUX occurs competition with risk phenomenon, the drive current signal of output is in competition or phenomenon of taking a risk
Moment of generation produces the operation principle of transient state burr, the application laser drive current burr removal circuit to be, the circuit
Equivalent to a latch, the pulse control signal CP of setting cycle, the week of the pulse control signal are added to the circuit
Phase is the minimum pulse width 1/N of the driving current, and wherein N is the natural number in addition to 0, so, in drive current
When a cycle of signal starts, the circuit plays latch, and its output keeps last drive current of previous cycle
Signal magnitude, so as to avoid the generation of burr, when pulse control signal CP by 1 become 0 after, the circuit turn-on, its output with
Currently the drive current signal of input is in the same size, and after pulse control signal becomes 1 by 0, latch is played again,
The size of the drive current signal of current input is kept, the rest may be inferred, complete drive current signal a cycle
Output.
Below with RGB laser projections display application come for example, MUX input as R, G, B color control electricity
The pwm signal of stream, is output as R, G, B drive current signal sequence, and the cycle of R, G, B drive current signal is identical
, but dutycycle is not necessarily identical.As shown in figure 3, the minimum duty cycle of the drive current signal of MUX output
It is that the dutycycle of 1%, R drive current signals is minimum duty cycle, i.e. the dutycycle of 1%, G drive current signals is
The cycle of 50%, CP is identical with the minimum pulse width of drive current signal (N=1), therefore the cycle of CP in this example
Pulse width with R drive current signals is identical.When the input of the application laser drive current burr removal circuit is R
During drive current signal, when CP is 1, the output of the circuit keeps a upper cycle last drive current signal
Size, that is, 0, so just avoid the generation of burr；After CP is changed into 0, the R driving currents of output with the input of the circuit
Pulse signal is identical；After CP is changed into 1, the size of the output when output holding CP of the circuit is 0, so as to complete a R drive
The output of the pulse width of streaming current pulse signal；After CP is changed into 0 again, the R driving current arteries and veins of output with the input of the circuit
Rush signal identical, because now R drive currents signal is changed into 0, therefore the output of the circuit is changed into 0, and is always maintained at
To the end cycle of R drive current signals.
It is 1 in CP when the input of the application laser drive current burr removal circuit is G drive current signals
When, the output of the circuit keeps the size of a upper cycle last drive current signal, that is, 0, so just avoids
The generation of burr；After CP is changed into 0, the output of the circuit is identical with the G drive current signals of input；After CP is changed into 1, institute
The size of the output when output holding CP for stating circuit is 0；After CP is changed into 0 again, the R of output with the input of the circuit drives electricity
Signal pulse stream is identical, and because now G drive currents signal is not yet changed into 0, therefore the output of the circuit still keeps
Original size；The rest may be inferred, and when CP is changed into 0 again, if G drive current signals are changed into 0, the output of the circuit is changed into
0, an output for the pulse width of G drive current signals is completed, the output (0) of the circuit is always maintained at G drivings
The end cycle of current pulse signal.
The output procedure and B drive currents signal of G drive current signals and R drive current signals it is defeated
Go out process identical, repeat no more.
Laser drive current burr removal circuit provided herein, opens in a drive current signal period
During the beginning, the output of the circuit keeps the size of a upper cycle last drive current signal such that it is able to drive is completely eliminated
The transient state burr of streaming current, and the circuit does not include electric capacity, will not extend the response time of driving current, with higher
Response efficiency.
Circuit is removed using above-mentioned laser drive current burr, the application also provides a kind of laser drive current burr
Minimizing technology, by second not gate input add pulse control signal, and the pulse control signal cycle
Be the minimum pulse width 1/N of the driving current, wherein N be the natural number in addition to 0 control the circuit latch and
Conducting function, so as to avoid the generation of driving current burr, and does not influence the response time of driving current.
Using the laser drive current burr minimizing technology, the application also provides a kind of laser projection display method,
Methods described is applied to laser light projection display system.The influence of Stimulated Light device driving current burr removal circuit latch effect, its
Output signal can delay 1/2 cycle of pulse control signal compared to input signal, therefore in the laser projection display method
The lock in time of colour wheel in middle adjustment laser light projection display system, the lock in time of the colour wheel is postponed the Pulse Width Control and believe
Number 1/2 cycle, keep synchronous with the colour wheel in the output and laser projection system that ensure the circuit.
Application additionally provides a kind of laser light projection display system, and the system includes the laser drive current shown in Fig. 1
Burr removes circuit.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between there is any this actual relation or backward.And, term " including ", "comprising" or its any other variant be intended to
Cover including for nonexcludability, so that process, method, device or equipment including a series of key elements not only include those
Key element, but also other key elements including being not expressly set out, or also include for this process, method, device or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in the process including the key element, method, device or equipment.
Above-described presently filed embodiment does not constitute the restriction to the application protection domain.
Claims (4)
1. a kind of laser drive current burr removes circuit, it is characterised in that the circuit includes：
First not gate, the input of first not gate connects with the driving current output end of previous stage driving current output circuit
Connect, the output end of first not gate is connected with the first input end of the first AND OR NOT gate；
Second not gate, the input of second not gate is used for input pulse control signal, the output end of second not gate with
The second input connection of first AND OR NOT gate, and be connected with the 4th input of the second AND OR NOT gate, described first and
The first input end of nor gate and the second input are same two inputs with door in first AND OR NOT gate；
First AND OR NOT gate, the 3rd input of first AND OR NOT gate is connected with the output end of second AND OR NOT gate,
The output end of first AND OR NOT gate is connected with the first input end of second AND OR NOT gate, and as the of the circuit
One output end；
Second AND OR NOT gate, the 3rd input of second AND OR NOT gate and the driving electricity of previous stage driving current output circuit
Stream output end connection, the output end of second AND OR NOT gate is connected with the 3rd input of first AND OR NOT gate, and makees
Be the second output end of the circuit, the 3rd input and the 4th input of second AND OR NOT gate for described second with or
Same two inputs with door in not gate.
2. a kind of laser drive current burr minimizing technology, it is characterised in that the laser described in usage right requirement 1 drives
Current spikes remove circuit,
Pulse control signal is added in the input of second not gate, the cycle of the pulse control signal drives electricity for described
The minimum pulse width 1/N of stream, wherein N are the natural number in addition to 0.
3. a kind of laser projection display method, it is characterised in that the laser drive current burr described in usage right requirement 2 goes
Except method, and postponed 1/2 cycle of the pulse control signal lock in time of colour wheel in laser light projection display system.
4. a kind of laser light projection display system, it is characterised in that gone including the laser drive current burr described in claim 1
Except circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710173887.8A CN106896635B (en) | 2017-03-22 | 2017-03-22 | A kind of laser drive current burr removal circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710173887.8A CN106896635B (en) | 2017-03-22 | 2017-03-22 | A kind of laser drive current burr removal circuit and method |
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| Publication Number | Publication Date |
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| CN106896635A true CN106896635A (en) | 2017-06-27 |
| CN106896635B CN106896635B (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710173887.8A Active CN106896635B (en) | 2017-03-22 | 2017-03-22 | A kind of laser drive current burr removal circuit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226969A (en) * | 2018-11-05 | 2019-01-18 | 苏州大学 | Deburring laser head and the laser deburring device for applying it |
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|---|---|---|---|---|
| US5844429A (en) * | 1996-02-01 | 1998-12-01 | Lg Semicon Co., Ltd. | Burn-in sensing circuit |
| CN1917368A (en) * | 2006-09-12 | 2007-02-21 | 北京中星微电子有限公司 | Method and device for removing burrs in signal |
| CN101299159A (en) * | 2008-07-01 | 2008-11-05 | 深圳市远望谷信息技术股份有限公司 | Clock switch circuit |
| EP2139113A1 (en) * | 2008-06-23 | 2009-12-30 | Dialog Semiconductor GmbH | Glitch-free clock suspend and resume circuit |
| CN105652574A (en) * | 2016-03-29 | 2016-06-08 | 海信集团有限公司 | Color wheel synchronization control method and device for laser projection device |
| CN106249530A (en) * | 2016-06-30 | 2016-12-21 | 海信集团有限公司 | Projection light source drives control circuit |
-
2017
- 2017-03-22 CN CN201710173887.8A patent/CN106896635B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5844429A (en) * | 1996-02-01 | 1998-12-01 | Lg Semicon Co., Ltd. | Burn-in sensing circuit |
| CN1917368A (en) * | 2006-09-12 | 2007-02-21 | 北京中星微电子有限公司 | Method and device for removing burrs in signal |
| EP2139113A1 (en) * | 2008-06-23 | 2009-12-30 | Dialog Semiconductor GmbH | Glitch-free clock suspend and resume circuit |
| CN101299159A (en) * | 2008-07-01 | 2008-11-05 | 深圳市远望谷信息技术股份有限公司 | Clock switch circuit |
| CN105652574A (en) * | 2016-03-29 | 2016-06-08 | 海信集团有限公司 | Color wheel synchronization control method and device for laser projection device |
| CN106249530A (en) * | 2016-06-30 | 2016-12-21 | 海信集团有限公司 | Projection light source drives control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226969A (en) * | 2018-11-05 | 2019-01-18 | 苏州大学 | Deburring laser head and the laser deburring device for applying it |
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| Publication number | Publication date |
|---|---|
| CN106896635B (en) | 2018-11-16 |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: HISENSE ELECTRIC Co.,Ltd. |