CN107484306A - A kind of light supply apparatus and projecting apparatus - Google Patents
A kind of light supply apparatus and projecting apparatus Download PDFInfo
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- CN107484306A CN107484306A CN201610776361.4A CN201610776361A CN107484306A CN 107484306 A CN107484306 A CN 107484306A CN 201610776361 A CN201610776361 A CN 201610776361A CN 107484306 A CN107484306 A CN 107484306A
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- light
- emitting component
- supply apparatus
- voltage
- negative pole
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/23—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of light supply apparatus and projecting apparatus, the light supply apparatus includes：Light-emitting component string, light-emitting component string have the light-emitting component of multiple series connection, and to two light-emitting components of arbitrary neighborhood, in direction of current flow, the negative pole of previous light-emitting component connects the positive pole of the latter light-emitting component；Control circuit, control circuit are used to detect voltage between light-emitting component positive pole and negative pole, judge whether light-emitting component is breaking according to testing result, if it is, by the positive pole of light-emitting component and negative pole short circuit.Light supply apparatus detects whether each light-emitting component occurs open circuit by control circuit, when having detected that light-emitting component occurs breaking, the positive pole and negative pole short circuit of the light-emitting component of open circuit will occur, to cause light-emitting component string to be in path, ensure the normal work of light-emitting component string, avoid due to caused by breaking problem occurs for part light-emitting component string whole light-emitting component string can not normal work the problem of.
Description
This application claims submit Patent Office of the People's Republic of China, Application No. 201610401920.3, invention name on June 7th, 2016
Referred to as the priority of the Chinese patent application of " a kind of light supply apparatus and laser-projector ", entire contents are incorporated by reference
In this application.
Technical field
The present invention relates to projection arrangement technical field, in particular, is related to a kind of light supply apparatus and projecting apparatus.
Background technology
In general, single light-emitting component power are all smaller；For example, the power of single laser diode is usually a 10W left sides
The right side, the brightness of 180 lumens can be produced.And the light supply apparatus of some equipment (such as projecting apparatus) brightness typically be mostly 3000 with
On, so that light supply apparatus just needs multiple light-emitting device arrays to use, and higher brightness demand is met with this.
The type of drive of array light-emitting element typically has two kinds, and one kind is to be used in series, and one kind is used in parallel.Parallel connection makes
It is that driving current is huge the shortcomings that this mode maximum, caloric value is big, and efficiency is not with being individually to drive each light-emitting component respectively
It is high.Due to the disadvantages mentioned above of mode used in parallel, use more be used in series mode at this stage.It is used in series the driving electricity of mode
Flow small, cost is low.But a major defect being used in series is once one of light-emitting component is breaking, will be caused whole
All light-emitting components in the series loop of light-emitting component can not normal work.
Therefore, when the light emitting elements in series in array light-emitting element in use, how to overcome part light-emitting component open circuit to lead
The light emitting elements in series loop of cause can not normal use the problem of, be current urgent problem to be solved.
The content of the invention
In order to solve the above problems, the invention provides a kind of light supply apparatus and projecting apparatus, the light supply apparatus passes through
Control circuit detects whether each light-emitting component occurs open circuit, when having detected that light-emitting component occurs breaking, open circuit will occur
Light-emitting component positive pole and negative pole short circuit, to cause light-emitting component string to be in path, ensure the normal work of light-emitting component string
Make, avoid caused by breaking problem occurs for part light-emitting component string whole light-emitting component string can not normal work ask
Topic.
To achieve these goals, the present invention provides following technical scheme：
A kind of light supply apparatus, the light supply apparatus include：
Light-emitting component string, the light-emitting component string have the light-emitting component of multiple series connection, luminous to two of arbitrary neighborhood
Element, in direction of current flow, the negative pole of previous light-emitting component connects the positive pole of the latter light-emitting component；
Control circuit, the control circuit is used to detect the voltage between the light-emitting component positive pole and negative pole, according to inspection
Survey result and judge whether the light-emitting component is breaking, if it is, by the positive pole of the light-emitting component and negative pole short circuit.
Preferably, in above-mentioned light supply apparatus, the control circuit includes：Controller, the multiple and light-emitting component one
Voltage detecting circuit corresponding to one and the multiple and one-to-one on-off circuit of the light-emitting component；
The voltage detecting circuit is used to obtain the test voltage between the positive pole and negative pole of corresponding light-emitting component,
When the test voltage is more than the specified conducting voltage of the light-emitting component, feedback signal is generated, the feedback signal is sent
To the controller；
After the controller obtains the feedback signal, switch controlling signal is generated according to the feedback signal, it is described to open
Close control signal to be used to control on-off circuit conducting corresponding with the light-emitting component, by the positive pole of the light-emitting component and bear
It is extremely short to connect.
In one embodiment, in above-mentioned light supply apparatus, the voltage detecting circuit includes：Voltage-regulator diode and light
Electric coupler；
Wherein, the photoelectrical coupler has first input end, the second input and output end；The first input end
It is connected with the positive pole of the voltage-regulator diode, the negative pole of the voltage-regulator diode is connected with the positive pole of corresponding light-emitting component；
Second input is connected with the negative pole of corresponding light-emitting component；The output end is connected with the controller；The hair
During optical element open circuit, the voltage-regulator diode is reversed breakdown so that the photoelectrical coupler conducting, the photoelectrical coupler life
Into the feedback signal；
When the voltage detecting circuit generates the feedback signal, the controller is sent to by the output end.
In one embodiment, in above-mentioned light supply apparatus, the on-off circuit includes：Relay, the relay utensil
There are the 3rd input, the 4th input and the first control terminal；
Wherein, the 3rd input is connected with the positive pole of corresponding light-emitting component；4th input and institute are right
The negative pole connection for the light-emitting component answered；First control terminal is connected with the controller；
When the controller generates the switch controlling signal, the switch controlling signal is sent to corresponding relay
First control terminal of device.
In one embodiment, in above-mentioned light supply apparatus, the light-emitting component string is connected with first voltage source, and described
One voltage source is used to provide operating current for the light-emitting component；
The relay is connected with the second voltage source, and the second voltage source is used to provide nominal operation for the relay
Voltage；
Wherein, the first voltage source is different from the second voltage source.
In one embodiment, in above-mentioned light supply apparatus, the on-off circuit includes：Switching tube, the switch pipe
Have：5th input, the 6th input and the second control terminal；
Wherein, the 5th input is connected with the positive pole of corresponding light-emitting component；Described 6th is defeated and corresponding
The negative pole connection of light-emitting component；Second control terminal is connected with the controller；
When the controller generates the switch controlling signal, the switch controlling signal is sent to corresponding switch
Second control terminal of pipe.
In one embodiment, in above-mentioned light supply apparatus, the switching tube is metal-oxide-semiconductor.
In one embodiment, in above-mentioned light supply apparatus, one end connection first port of the light-emitting component string is described
First port is used to connect first voltage source；
The other end connection second port of the light-emitting component string, the second port are used to connect constant-flow driver, institute
The current value that constant-flow driver is used to adjust the light-emitting component string is stated, to adjust the luminous intensity of the light supply apparatus.
In one embodiment, the light-emitting component is laser diode or light emitting diode.
Present invention also offers a kind of projecting apparatus, including：Light supply apparatus described in any of the above-described.
The light supply apparatus provided by foregoing description, technical solution of the present invention, the light supply apparatus include：Light-emitting component
String, the light-emitting component string has the light-emitting component of multiple series connection, to two light-emitting components of arbitrary neighborhood, in electric current flowing side
Upwards, the negative pole of previous light-emitting component connects the positive pole of the latter light-emitting component；Control circuit, the control circuit are used to examine
The voltage surveyed between the light-emitting component positive pole and negative pole, judge whether the light-emitting component is breaking according to testing result, if
It is, by the positive pole of the light-emitting component and negative pole short circuit.The light supply apparatus detects each light-emitting component by control circuit
No that open circuit occurs, when having detected that light-emitting component occurs breaking, positive pole and the negative pole that the light-emitting component of open circuit will occur are short
Connect, to cause light-emitting component string to be in path, ensure the normal work of light-emitting component string, avoid due to part light-emitting component string
Caused by the breaking problem of generation whole light-emitting component string can not normal work the problem of.Projecting apparatus described in technical solution of the present invention
Using above-mentioned light supply apparatus, avoid the light supply apparatus of conventional projector causes nothing due to the breaking problem of part light-emitting component
The problem of method normal work.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of light supply apparatus provided in an embodiment of the present invention；
Fig. 2 is a kind of principle schematic of voltage detecting provided in an embodiment of the present invention；
Fig. 3 is the structural representation of another light supply apparatus provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As described in the background art, when the light emitting elements in series in array light-emitting element in use, how to overcome part
Light emitting elements in series loop caused by light-emitting component open circuit can not normal use the problem of, be current urgent problem to be solved.
In order to solve the above problems, the embodiments of the invention provide a kind of light supply apparatus, the light supply apparatus includes：
Light-emitting component string, the light-emitting component string have the light-emitting component of multiple series connection, luminous to two of arbitrary neighborhood
Element, in direction of current flow, the negative pole of previous light-emitting component connects the positive pole of the latter light-emitting component；
Control circuit, the control circuit is used to detect the voltage between the light-emitting component positive pole and negative pole, according to inspection
Survey result and judge whether the light-emitting component is breaking, if it is, by the positive pole of the light-emitting component and negative pole short circuit.
It can be seen that the light supply apparatus detects whether each light-emitting component occurs open circuit by control circuit, detecting
When light-emitting component occurs breaking, the positive pole and negative pole short circuit of the light-emitting component of open circuit will occur, to cause at light-emitting component string
In path, ensure the normal work of light-emitting component string, avoid caused by breaking problem occurs for part light-emitting component string
Whole light-emitting component string can not normal work the problem of.
In order that technical scheme provided in an embodiment of the present invention is clearer, such scheme is carried out below in conjunction with the accompanying drawings detailed
Thin description.
With reference to figure 1, Fig. 1 is a kind of structural representation of light supply apparatus provided in an embodiment of the present invention, the light supply apparatus bag
Include：Light-emitting component string 11 and control circuit 12.
The light-emitting component string 11 has the light-emitting component 111 of multiple series connection, to two light-emitting components of arbitrary neighborhood
111, in direction of current flow, the negative pole of previous light-emitting component 111 connects the positive pole of the latter light-emitting component 1111, i.e. institute
There is light-emitting component 111 to connect.The direction of current flow refers to the positive pole of light-emitting component 111 to the direction of negative pole.
In light supply apparatus shown in Fig. 1, two connected light-emitting components are illustrate only.Light-emitting component 111 in light supply apparatus
Number can be set according to the brightness demand of light supply apparatus, number of the embodiment of the present invention to light-emitting component in light supply apparatus 111
Do not limit.
The control circuit 12 is used to detect the voltage between the positive pole of light-emitting component 111 and negative pole, is tied according to detection
Fruit judges whether the light-emitting component is breaking, if it is, by the positive pole of the light-emitting component and negative pole short circuit.
As shown in figure 1, the control circuit 12 includes：Controller 123, multiple corresponded with the light-emitting component 111
Voltage detecting circuit 121 and multiple with the one-to-one on-off circuit 122 of the light-emitting component 111.
The voltage detecting circuit 121 is used to obtain the test between the positive pole and negative pole of corresponding light-emitting component 111
Voltage, when the test voltage is more than the specified conducting voltage of the light-emitting component 111, feedback signal is generated, will be described anti-
Feedback signal is sent to the controller 123.After the controller 123 obtains the feedback signal, given birth to according to the feedback signal
Into switch controlling signal, the switch controlling signal is used to control on-off circuit 122 corresponding with the light-emitting component 111 to lead
It is logical, by the positive pole and negative pole short circuit of the light-emitting component 111.
It can be seen that in the control circuit, each light-emitting component 111 is provided with one and is used to detect the light-emitting component
The voltage detecting circuit 121 of voltage between 111 positive poles and negative pole.Two inputs of each voltage detecting circuit 121 respectively with
Positive pole and the negative pole connection of corresponding light-emitting component 111, the electricity between positive pole and negative pole for detecting the light-emitting component 111
Pressure.
If a light-emitting component 111 is breaking due to failure, the voltage between its positive pole and negative pole will increase.Can be by
This judges whether light-emitting component 111 is breaking.Because two inputs of each voltage detecting circuit 121 light with corresponding respectively
Positive pole and the negative pole connection of element 111, if there are multiple open circuits of light-emitting component 111 in light-emitting component string 11, electricity can be passed through
Pressure detection circuit 121 transmits operating voltage, ensures the correctness of voltage detecting.The voltage detecting circuit 121 carries out voltage inspection
The principle of survey is as shown in Figure 2.
Reference chart, Fig. 2 are a kind of principle schematic of voltage detecting provided in an embodiment of the present invention.If light-emitting component string
Open circuit occurs for light-emitting component 111A and light-emitting component 111B in 11, light-emitting component 111A and light-emitting component 111B can with adjacent or
It is non-conterminous.Voltage detecting circuit 121A is used to detect the voltage between light-emitting component 111A the two poles of the earth.If voltage detecting circuit
121B is used to detect the voltage between light-emitting component 111B the two poles of the earth.Voltage detecting circuit 121B can pass through voltage detecting circuit
121A is connected with feeder ear, to test the voltage between light-emitting component 111B the two poles of the earth, will not be occurred because light-emitting component 111A breaks
Road and can not be between proper testing light-emitting component 111B the two poles of the earth voltage the problem of.
As shown in figure 1, in light supply apparatus described in the embodiment of the present invention, the voltage detecting circuit 121 includes：The pole of voltage stabilizing two
Pipe D and photoelectrical coupler M.Wherein, the photoelectrical coupler M has first input end, the second input and output end.Institute
The positive pole that first input end is stated with the voltage-regulator diode D is connected, the negative pole of the voltage-regulator diode D and corresponding luminous member
The positive pole connection of part 111.Second input is connected with the negative pole of corresponding light-emitting component 111；The output end and institute
Controller 123 is stated to connect.When the light-emitting component 111 is breaking, the voltage-regulator diode D is reversed breakdown so that the light
Electric coupler M is turned on, and the photoelectrical coupler M generates the feedback signal, and the feedback signal is sent into the control
Device 123.When the voltage detecting circuit 121 generates the feedback signal, the controller is sent to by the output end
123。
As shown in figure 1, in light supply apparatus described in the embodiment of the present invention, the on-off circuit 122 includes：Relay Q1, institute
Stating relay Q1 has the 3rd input, the 4th input and the first control terminal.Wherein, the 3rd input with it is corresponding
Light-emitting component 111 positive pole connection；4th input is connected with the negative pole of corresponding light-emitting component 111；Described
One control terminal is connected with the controller 123.When the controller 123 generates the switch controlling signal, by the switch
Control signal is sent to corresponding relay Q1 the first control terminal.The first control end structure of the relay Q1 is opened described in
When closing control signal, the 3rd input and the conducting of the 4th input are controlled, to cause the corresponding short circuit of light-emitting component 111.
In light supply apparatus shown in Fig. 1, voltage-regulator diode D forward conduction voltage is led more than the specified of light-emitting component 111
Be powered pressure, i.e. the forward conduction voltage more than light-emitting component 111.During 111 path of light-emitting component, due to voltage-regulator diode D just
It is more than the specified conducting voltage of light-emitting component 111, voltage-regulator diode D open circuits to conducting voltage.When the open circuit of a light-emitting component 111
When, the voltage between the positive pole and negative pole of the light-emitting component 111 becomes big, voltage stabilizing two corresponding to the reverse breakdown light-emitting component 111
Pole pipe D, and then photoelectrical coupler M corresponding to the light-emitting component 111 is turned on, so as to generate feedback signal.Controller 123
Switch controlling signal is generated according to feedback signal, controls the 3rd input and the of relay Q1 corresponding to the light-emitting component 111
Four inputs turn on, and then by the positive pole of the light-emitting component 111 and negative pole short circuit.
The light-emitting component string is connected with first voltage source VDD1, and it is the luminous member that the first voltage source VDD1, which is used for,
Part 111 provides operating current.When the timing of number one that luminous light-emitting component 111 is carried out in the light-emitting component string, the light
The luminous intensity of source device depending on first voltage source VDD1 act on light-emitting component string when, electric current is big in light-emitting component string
Small, on the premise of the normal work of light-emitting component 111 is ensured, electric current is bigger in light-emitting component string, and the brightness of light supply apparatus is bigger,
Electric current is smaller in light-emitting component string, and the brightness of light supply apparatus is smaller.
The relay Q is connected with the second voltage source VDD2, and the second voltage source VDD2 is used to carry for the relay Q
For rated operational voltage.Optionally, all relay Q are identical, all contained to send relay Q connection identical second voltages
Source VDD2.
As described above, electric current can change as the brightness of light supply apparatus is different in the light-emitting component string, therefore, the hair
What operating voltage when optical element 111 turns on was not constant between.And the relay Q needs a stable nominal operation electricity
Pressure, therefore, in the embodiment of the present invention, the first voltage source VDD1 is different from the second voltage source VDD2.
With reference to figure 3, Fig. 3 be another light supply apparatus provided in an embodiment of the present invention structural representation, the light supply apparatus
It is different from the implementation that light supply apparatus difference shown in Fig. 1 is on-off circuit 122, in the embodiment shown in fig. 3, switch electricity
Road 122 includes switching tube Q2.The switching tube Q2 has：5th input, the 6th input and the second control terminal.Wherein,
5th input is connected with the positive pole of corresponding light-emitting component 111；Described 6th defeated and corresponding light-emitting component 111
Negative pole connection；Second control terminal is connected with the controller 123.When the controller 123 generates the switch control
During signal, the switch controlling signal is sent to corresponding switching tube Q2 the second control terminal.
Equally it is that voltage-regulator diode D forward conduction voltage is more than light-emitting component 111 in light supply apparatus shown in Fig. 3
Specified conducting voltage, i.e. the forward conduction voltage more than light-emitting component 111.During 111 path of light-emitting component, due to voltage-regulator diode
D forward conduction voltage is more than the specified conducting voltage of light-emitting component 111, voltage-regulator diode D open circuits.When a light-emitting component 111
When breaking, the voltage between the positive pole and negative pole of the light-emitting component 111 becomes big, steady corresponding to the reverse breakdown light-emitting component 111
Diode D is pressed, and then photoelectrical coupler M corresponding to the light-emitting component 111 is turned on, so as to generate feedback signal.Controller
123 generate switch controlling signal according to feedback signal, control the 5th input of switching tube Q2 corresponding to the light-emitting component 111 with
And the 6th input short circuit.
In the embodiment shown in fig. 3, the switching tube Q2 can be metal-oxide-semiconductor.Specifically, the switching tube Q2 can be
NMOS tube or PMOS.
As shown in Fig. 1 or Fig. 3, in light supply apparatus described in the embodiment of the present invention, one end of the light-emitting component string 11
First port is connected, the first port is used to connect first voltage source VDD1；The other end connection of the light-emitting component string 11
Second port, the second port are used to connect constant-flow driver, and the constant-flow driver is used to adjust the light-emitting component string
Current value, to adjust the luminous intensity of the light supply apparatus.Wherein, the crossing current driver can be used for adjusting described light
The size of current of element string 11, to adjust the luminosity of light supply apparatus.Specifically, can be by the driver that flows over by luminous member
The electric current of part string 11 is divided into multiple grades of different sizes, and electric current is bigger, then the brightness of light supply apparatus is bigger, conversely, then brightness
It is smaller.
It should be noted that in light supply apparatus described in the embodiment of the present invention, the voltage detecting circuit and the switch
Circuit is schematic illustration, and particular circuit configurations include but is not limited to embodiment described in the embodiment of the present invention.In this hair
The embodiment for increasing protective resistance, electric capacity and other protection original papers in embodiment described in bright embodiment falls within the present invention
The inventive concept of embodiment.
By foregoing description, in light supply apparatus described in the embodiment of the present invention, all light-emitting components use tandem
Use, driving current is small, and energy consumption is low, reduces cost.Meanwhile the both positive and negative polarity of breaking light-emitting component is carried out by control circuit short
Connect so that light-emitting component string is in path, ensures the normal work of light-emitting component string, avoids because part light-emitting component string is sent out
Caused by raw breaking problem whole light-emitting component string can not normal work the problem of.
In one embodiment, above-mentioned light-emitting component is laser diode (LD).In another embodiment, it is above-mentioned luminous
Element is light emitting diode (LED).In other embodiments, above-mentioned light-emitting component can also be other solid-state light emitting elements, this
Invention is not limited to this.
Based on above-described embodiment, another embodiment of the present invention additionally provides a kind of projecting apparatus, and the projecting apparatus includes above-mentioned
Light supply apparatus described in any embodiment, avoid breaking problem of the light supply apparatus due to part light-emitting component of conventional projector
And the problem of leading to not normal work.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of light supply apparatus, it is characterised in that the light supply apparatus includes：
Light-emitting component string, the light-emitting component string have the light-emitting component of multiple series connection, to two light-emitting components of arbitrary neighborhood,
In direction of current flow, the negative pole of previous light-emitting component connects the positive pole of the latter light-emitting component；
Control circuit, the control circuit are used to detect the voltage between the light-emitting component positive pole and negative pole, tied according to detection
Fruit judges whether the light-emitting component is breaking, if it is, by the positive pole of the light-emitting component and negative pole short circuit.
2. light supply apparatus according to claim 1, it is characterised in that the control circuit includes：Controller, multiple and institute
State the one-to-one voltage detecting circuit of light-emitting component and the multiple and one-to-one on-off circuit of the light-emitting component；
The voltage detecting circuit is used to obtain the test voltage between the positive pole and negative pole of corresponding light-emitting component, described
When test voltage is more than the specified conducting voltage of the light-emitting component, feedback signal is generated, the feedback signal is sent to institute
State controller；
After the controller obtains the feedback signal, switch controlling signal, the switch control are generated according to the feedback signal
Signal processed is used to control on-off circuit conducting corresponding with the light-emitting component, and the positive pole of the light-emitting component and negative pole is short
Connect.
3. light supply apparatus according to claim 2, it is characterised in that the voltage detecting circuit includes：Voltage-regulator diode
And photoelectrical coupler；
Wherein, the photoelectrical coupler has first input end, the second input and output end；The first input end and institute
The positive pole connection of voltage-regulator diode is stated, the negative pole of the voltage-regulator diode is connected with the positive pole of corresponding light-emitting component；It is described
Second input is connected with the negative pole of corresponding light-emitting component；The output end is connected with the controller；The luminous member
During part open circuit, the voltage-regulator diode is reversed breakdown so that the photoelectrical coupler conducting, the photoelectrical coupler conducting life
Into the feedback signal；
When the voltage detecting circuit generates the feedback signal, the controller is sent to by the output end.
4. light supply apparatus according to claim 2, it is characterised in that the on-off circuit includes：Relay, the relay
Utensil has the 3rd input, the 4th input and the first control terminal；
Wherein, the 3rd input is connected with the positive pole of corresponding light-emitting component；4th input with it is corresponding
The negative pole connection of light-emitting component；First control terminal is connected with the controller；
When the controller generates the switch controlling signal, the switch controlling signal is sent to corresponding relay
First control terminal.
5. light supply apparatus according to claim 4, it is characterised in that the light-emitting component string is connected with first voltage source,
The first voltage source is used to provide operating current for the light-emitting component；
The relay is connected with the second voltage source, and the second voltage source is used to provide nominal operation electricity for the relay
Pressure；
Wherein, the first voltage source is different from the second voltage source.
6. light supply apparatus according to claim 2, it is characterised in that the on-off circuit includes：Switching tube, the switch
Pipe has：5th input, the 6th input and the second control terminal；
Wherein, the 5th input is connected with the positive pole of corresponding light-emitting component；Described 6th it is defeated with it is corresponding luminous
The negative pole connection of element；Second control terminal is connected with the controller；
When the controller generates the switch controlling signal, the switch controlling signal is sent to corresponding switching tube
Second control terminal.
7. light supply apparatus according to claim 6, it is characterised in that the switching tube is metal-oxide-semiconductor.
8. light supply apparatus according to claim 1, it is characterised in that one end connection first end of the light-emitting component string
Mouthful, the first port is used to connect first voltage source；
The other end connection second port of the light-emitting component string, the second port are used to connect constant-flow driver, the perseverance
Stream driver is used for the current value for adjusting the light-emitting component string, to adjust the luminous intensity of the light supply apparatus.
9. light supply apparatus according to any one of claims 1 to 8, it is characterised in that the light-emitting component is laser diode
Or light emitting diode.
A kind of 10. projecting apparatus, it is characterised in that including：Light supply apparatus as described in claim any one of 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/086164 WO2018040633A1 (en) | 2016-06-07 | 2017-05-26 | Light source device and projector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016104019203 | 2016-06-07 | ||
| CN201610401920 | 2016-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107484306A true CN107484306A (en) | 2017-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610776361.4A Pending CN107484306A (en) | 2016-06-07 | 2016-08-30 | A kind of light supply apparatus and projecting apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107484306A (en) |
| WO (1) | WO2018040633A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050140345A1 (en) * | 2003-10-23 | 2005-06-30 | Mitsubishi Denki Kabushiki Kaisha | Redundancy circuit for series-connected diodes |
| CN1790908A (en) * | 2005-12-21 | 2006-06-21 | 吕晓峰 | LED open circuit by-pass circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201007448Y (en) * | 2007-02-12 | 2008-01-16 | 邵炽良 | Single lamp control type LED lamp string |
| KR101955034B1 (en) * | 2011-12-07 | 2019-03-07 | 매그나칩 반도체 유한회사 | Detecting ciurcuit for short of led array and led driver apparatus having the same in |
-
2016
- 2016-08-30 CN CN201610776361.4A patent/CN107484306A/en active Pending
-
2017
- 2017-05-26 WO PCT/CN2017/086164 patent/WO2018040633A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050140345A1 (en) * | 2003-10-23 | 2005-06-30 | Mitsubishi Denki Kabushiki Kaisha | Redundancy circuit for series-connected diodes |
| CN1790908A (en) * | 2005-12-21 | 2006-06-21 | 吕晓峰 | LED open circuit by-pass circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018040633A1 (en) | 2018-03-08 |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Applicant after: APPOTRONICS Corp.,Ltd. Address before: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Applicant before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address after: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Applicant after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518055 Guangdong province Shenzhen Nanshan District Xili town south of Cha Guang road Shenzhen integrated circuit design application Industrial Park 401 Applicant before: APPOTRONICS Corp.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |