Projection device and monitoring method of light source module
阅读说明:本技术 投影装置以及光源模块的监控方法 (Projection device and monitoring method of light source module ) 是由 吴建均 彭致勋 于 2018-08-30 设计创作,主要内容包括:本发明提供一种投影装置以及光源模块的监控方法。投影装置包括光源模块、现场可编程逻辑门阵列以及微处理器。现场可编程逻辑门阵列用以接收来自于光源模块的电压信号、电流信号、温度信号以及亮度信号。微处理器用以依据电压信号、电流信号、温度信号以及亮度信号提供光源模块的监控结果。本发明提供的投影装置以及光源模块的监控方法,可监控光源模块的发光效能并且提供对应的效能警示。(The invention provides a projection device and a monitoring method of a light source module. The projection device comprises a light source module, a field programmable gate array and a microprocessor. The field programmable gate array is used for receiving the voltage signal, the current signal, the temperature signal and the brightness signal from the light source module. The microprocessor is used for providing a monitoring result of the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal. The projection device and the monitoring method of the light source module provided by the invention can monitor the luminous efficacy of the light source module and provide corresponding efficacy warning.)
1. A projection device is characterized by comprising a light source module, a voltage sensor, a current sensor, a temperature sensor, a brightness sensor, a field programmable gate array and a microprocessor, wherein:
the voltage sensor is coupled to the light source module and used for sensing a voltage signal generated by the light source module when the light source module is driven;
the current sensor is coupled to the light source module and used for sensing a current signal generated by the light source module when the light source module is driven;
the temperature sensor is used for sensing a temperature signal generated when the light source module is driven;
the brightness sensor is used for sensing a brightness signal generated when the light source module is driven;
the field programmable gate array is coupled to the voltage sensor, the current sensor, the temperature sensor and the brightness sensor, and is used for receiving the voltage signal, the current signal, the temperature signal and the brightness signal; and
the microprocessor is coupled to the field programmable gate array and used for providing a monitoring result of the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal.
2. The projection device of claim 1, further comprising:
a selection circuit coupled to the FPGA, the voltage sensor, the current sensor, the temperature sensor and the brightness sensor,
wherein the field programmable gate array receives at least one of the voltage signal, the current signal, the temperature sensing signal and the brightness sensing signal in a time-sharing manner by the selection circuit.
3. The projection device of claim 1, wherein the field programmable gate array comprises:
the register is used for storing the voltage signal, the current signal, the temperature sensing signal and the brightness sensing signal.
4. The projection device of claim 1, wherein the field programmable gate array comprises:
a signal mode converter, coupled to the voltage sensor, the current sensor and the temperature sensor, for:
converting the voltage signal in analog signal form into the voltage signal in digital signal form,
converting said current signal in the form of an analog signal into said current signal in the form of a digital signal, an
Converting the temperature signal in analog signal form to the temperature signal in digital signal form.
5. The projection device of claim 1, wherein the microprocessor comprises:
a storage unit for storing a lookup table for storing a plurality of characteristic decay trends,
wherein the microprocessor provides the monitoring results corresponding to the voltage signal, the current signal, the temperature signal and the brightness signal according to a plurality of characteristic degradation trends of the lookup table.
6. The projection apparatus of claim 1, wherein the microprocessor provides half-life warning information associated with the light source module according to the monitoring result.
7. The projection device of claim 1, wherein the projection device further comprises:
and the communication module is used for transmitting the monitoring result.
8. The projection apparatus of claim 1, wherein the light source module comprises a string of light emitting elements and a shunt module, wherein:
the light emitting element string is provided with a first light emitting part, a second light emitting part and a third light emitting part, wherein the first light emitting part, the second light emitting part and the third light emitting part comprise a plurality of light emitting elements which are connected in series; and
the shunt module is coupled with the light-emitting element string, and the shunt module comprises a first shunt circuit, a second shunt circuit and a third shunt circuit, wherein:
the first shunt circuit is connected with the first light-emitting part in parallel to form a pair of first connecting contacts on the light-emitting element string and is used for providing a first shunt path;
the second shunt circuit is connected in parallel with the second light-emitting part to form a pair of second connection contacts on the light-emitting element string and is used for providing a second shunt path; and
the third shunt circuit is connected in parallel with the third light emitting section to form a pair of third connection contacts on the light emitting element string and to provide a third shunt path,
wherein at least one of the light emitting elements between the pair of first connecting contacts, at least one of the light emitting elements between the pair of second connecting contacts, and at least one of the light emitting elements between the pair of third connecting contacts are not identical.
9. The projection apparatus according to claim 8, wherein when a first shunt path in the light source module is provided, the voltage sensor is configured to sense a first voltage signal of the first light emitting portion, the current sensor is configured to sense a first current signal of the first light emitting portion, the temperature sensor is configured to sense a first temperature signal of the first light emitting portion, and the brightness sensor is configured to sense a first brightness signal of the first light emitting portion.
10. The projection device of claim 1, wherein the projection device further comprises:
a color wheel for generating a plurality of different color lights from the light provided by the light source module,
the color wheel is arranged between the brightness sensor and the light source module, so that the brightness sensor senses brightness signals of the plurality of different color lights corresponding to the light source module.
11. A monitoring method of a light source module is characterized in that the monitoring method is used for monitoring the light source module of a projection device and comprises the following steps:
sensing a voltage signal, a current signal, a temperature signal and a brightness signal when the light source module is driven;
receiving the voltage signal, the current signal, the temperature signal and the brightness signal from the light source module; and
providing a monitoring result corresponding to the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal of the light source module.
12. The method for monitoring a light source module according to claim 11, wherein the step of receiving the voltage signal, the current signal, the temperature signal and the brightness signal from the light source module comprises:
receiving at least one of the voltage signal, the current signal, the temperature sensing signal and the brightness sensing signal in a time-sharing manner.
13. The monitoring method of a light source module according to claim 11, further comprising:
storing the voltage signal, the current signal, the temperature sensing signal and the brightness sensing signal.
14. The monitoring method of a light source module according to claim 11, further comprising:
converting the voltage signal in analog signal form to the voltage signal in digital signal form;
converting the current signal in analog signal form to the current signal in digital signal form; and
converting the temperature signal in analog signal form to the temperature sensing signal in digital signal form.
15. The method according to claim 11, wherein the step of providing the monitoring result corresponding to the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal of the light source module comprises:
providing a lookup table for storing a plurality of characteristic decay trends; and
providing the monitoring results corresponding to the voltage signal, the current signal, the temperature signal and the brightness signal according to a plurality of characteristic degradation trends of the lookup table.
16. The monitoring method of a light source module according to claim 11, further comprising:
the monitoring result provides half-life warning information associated with the light source module.
17. The monitoring method of a light source module according to claim 11, further comprising:
and transmitting the monitoring result.
18. The method according to claim 11, wherein each of the light source modules includes a light emitting element string having a first light emitting portion, a second light emitting portion, and a third light emitting portion, wherein the first light emitting portion, the second light emitting portion, and the third light emitting portion include a plurality of light emitting elements connected in series, further comprising:
a pair of first connection points are formed on the light emitting element string in parallel with the first light emitting part and used for providing a first shunt path;
a pair of second connection contacts formed on the light emitting element string in parallel with the second light emitting section and for providing a second shunt path; and
a pair of third connection contacts formed on the light emitting element string in parallel with the third light emitting section and for providing a third shunt path,
wherein at least one of the light emitting elements between the pair of first connecting contacts, at least one of the light emitting elements between the pair of second connecting contacts, and at least one of the light emitting elements between the pair of third connecting contacts are not identical.
19. The monitoring method of a light source module according to claim 18, further comprising:
sensing a first voltage signal corresponding to the first light emitting portion of the light source module when the first shunt path of the light source module is provided;
sensing a first current signal corresponding to the first light emitting part of the light source module;
sensing a first temperature signal corresponding to the first light emitting portion of the light source module; and
sensing a first luminance signal corresponding to the first light emitting portion of the light source module.
20. The monitoring method of the light source module according to claim 11, wherein the step of sensing the voltage signal, the current signal, the temperature signal, and the brightness signal when the light source module is driven comprises:
converting the light provided by the light source module into a plurality of different color lights; and
and sensing the brightness signal of each of the plurality of different color lights.
Technical Field
The present invention relates to a device having a light source module and a method for monitoring the device, and more particularly, to a projection device and a method for monitoring the light source module.
Background
In a projector, a light source module is one of the main display modules. When the light emitting efficiency of the projector is not good, the problem of poor light emitting efficiency can be solved by replacing the light source module in the projector. However, most light source modules are determined to be replaced only when abnormality occurs or the luminous efficacy is greatly reduced. Therefore, how to monitor the light emitting efficiency of the light source module and provide the corresponding performance warning when the projector is used is one of the important development points of the projector.
The background section is only provided to assist in understanding the present disclosure, and therefore, the disclosure in the background section may include some well-known techniques that do not constitute a part of the common general knowledge of those skilled in the art. The statements made in the background section do not represent the statements or other language which may be read by one of ordinary skill in the art upon making a present application.
Disclosure of Invention
The invention provides a projection device and a monitoring method of a light source module, which can monitor the luminous efficacy of the light source module and provide corresponding efficacy warning.
Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.
To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a projection apparatus including a light source module, a voltage sensor, a current sensor, a temperature sensor, a brightness sensor, a field programmable gate array and a microprocessor. The voltage sensor is coupled to the light source module. The voltage sensor is used for sensing a voltage signal generated when the light source module is driven. The current sensor is coupled to the light source module. The current sensor is used for sensing a current signal generated when the light source module is driven. The temperature sensor is used for sensing a temperature signal generated when the light source module is driven. The brightness sensor is used for sensing a brightness signal generated when the light source module is driven. The field programmable gate array is coupled to the voltage sensor, the current sensor, the temperature sensor and the brightness sensor. The field programmable gate array is used for receiving a voltage signal, a current signal, a temperature signal and a brightness signal. The microprocessor is coupled with the field programmable gate array. The microprocessor is used for providing a monitoring result of the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal.
To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a monitoring method for a light source module. The monitoring method of the light source module comprises the following steps: sensing a voltage signal, a current signal, a temperature signal and a brightness signal when the light source module is driven; receiving a voltage signal, a current signal, a temperature signal and a brightness signal; and providing a monitoring result corresponding to the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal.
Based on the above, the embodiments of the invention have at least one of the following advantages or efficacies. The projection device senses a voltage signal, a current signal, a temperature signal and a brightness signal when the light source module is driven, and provides a monitoring result corresponding to the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal of the light source module. The invention can monitor the actual luminous efficacy of the light source module when the projector is used and provide the efficacy warning corresponding to the monitoring result. Therefore, at least one of the user side, the product development side or the client server side can acquire the actual performance condition and the warning of the light source module according to the monitoring result and the performance warning, so that whether the light source module needs to be maintained or replaced can be judged at an earlier time point.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic view of a projection apparatus according to a first embodiment of the invention.
Fig. 2 is a schematic view of a projection apparatus according to a second embodiment of the invention.
Fig. 3 is a schematic view of a light source module according to an embodiment of the invention.
Fig. 4 is a schematic view of a projection apparatus according to a third embodiment of the invention.
Fig. 5 is a schematic view illustrating a monitoring method of a light source module according to an embodiment of the invention.
Detailed Description
The foregoing and other features, aspects and utilities of the present general inventive concept will be apparent from the following detailed description of a preferred embodiment thereof, which is to be read in connection with the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic view of a projection apparatus according to a first embodiment of the invention. In the present embodiment, the
Similarly, regarding the light source module 110_2, when the light source module 110_2 is driven, the voltage sensor 120_2 coupled to the light source module 110_2 senses the voltage signal VS _2 generated by the light source module 110_2 when the light source module 110_2 is driven. The current sensor 130_2 coupled to the light source module 110_2 senses a current signal IS _2 generated when the light source module 110_2 IS driven. The temperature sensor 140_2 senses a temperature signal TS _2 generated by the light source module 110_2 when driven. The
For example, when the light source module 110_1 is driven by a power source, the voltage sensor 120_1 senses a voltage signal VS _1 generated by a voltage across two selected nodes (e.g., two nodes located at the power input end of the light source module 110_1 and the low voltage end of the light source module 110_ 1) of the light source module 110_ 1. The current sensor 130_1 senses a current value passing through the light source module 110_1 to generate a current signal LS _ 1. The actual electrical performance of the light source module 110_1 when driven is known according to the voltage signal VS _1 or/and the current signal LS _ 1. The temperature sensor 140_1 senses a temperature signal TS _1 when the light source module 110_1 is driven. The
In the present embodiment, the field
The monitoring time may be during the period when the
In some embodiments, the field
The
To be further described, with the characteristics of the light emitting device in essence, when the light source modules 110_1 and 110_2 are driven by, for example, a constant current power source, if the performances of the light source modules 110_1 and 110_2 begin to decline, the voltage across the two selected nodes of the light source modules 110_1 and 110_2 will begin to decrease. At the same time, the brightness of the light source modules 110_1 and 110_2 also starts to decrease. Conversely, the temperature of the light source modules 110_1 and 110_2 will increase. Therefore, under the same cooling condition of the
The
In some embodiments, the monitoring results MS _1 and MS _2 can represent the results of the differences and/or percentages of the voltage signals VS _1 and VS _2, the current signals IS _1 and IS _2, the temperature signals TS _1 and TS _2, and the luminance signals LS _1 and LS _2 compared to the voltage specification, the current specification, the temperature specification, and the luminance specification of the light emitting device when the light emitting device IS not used completely. In this way, at least one of the user side, the product development side or the client side can obtain the current actual light emitting performance and the actual electrical performance of the light source modules 110_1 and 110_2 according to the above results. In addition, the
Referring to fig. 2, fig. 2 is a schematic view of a projection apparatus according to a second embodiment of the invention. In this embodiment, the
To further illustrate, in the present embodiment, the light source modules 210_1 and 210_2 are driven in a time-sharing manner. That is, the light source modules 210_1 and 210_2 are not driven at the same time point. When the light source module 210_1 IS driven, the
In this embodiment, the field
In this embodiment, the
In some embodiments, the
In this embodiment, regarding the implementation details of the voltage sensors 220_1 and 220_2, the current sensors 230_1 and 230_2, the temperature sensors 240_1 and 240_2, the
Referring to fig. 3, fig. 3 is a schematic diagram of a light source module according to an embodiment of the invention, in the embodiment, the
In the present embodiment, during the driving of the
Similarly, the
Fig. 4 is a schematic view of a projection apparatus according to a third embodiment of the invention. Unlike fig. 2, the
Here, for example, the color wheel CW may generate the light into red, yellow, green, and blue light. The light source module 410_1 provides light when driven for a first monitoring time, the color wheel CW generates light to red light for a first sub-time of the first monitoring time, generates light to yellow light for a second sub-time of the first monitoring time, generates light to green light for a third sub-time of the first monitoring time, and generates light to blue light for a fourth sub-time of the first monitoring time. Accordingly, the
Referring to fig. 5, fig. 5 is a schematic view illustrating a monitoring method of a light source module according to an embodiment of the invention. In step S510, a voltage signal, a current signal, a temperature signal, and a brightness signal when the light source module is driven are sensed. In step S520, a voltage signal, a current signal, a temperature signal, and a brightness signal are received. In step S530, a monitoring result corresponding to the light source module is provided according to the voltage signal, the current signal, the temperature signal and the brightness signal. Details regarding the implementation of the above steps have been elaborated in the various embodiments of fig. 1, 2 and 4, and therefore cannot be reiterated here.
In summary, the embodiments of the invention have at least one of the following advantages or effects. The projection device senses a voltage signal, a current signal, a temperature signal and a brightness signal when the light source module is driven, and provides a monitoring result corresponding to the light source module according to the voltage signal, the current signal, the temperature signal and the brightness signal of the light source module. The invention can monitor the actual luminous efficacy of the light source module when the projector is used and provide the efficacy warning corresponding to the monitoring result. Therefore, the use feeling of the projection device can be optimized. For product development, monitoring results may be collected to build a database. In addition, the monitoring result can be used for predicting the use state of the light source module in advance to provide proper service countermeasures.
It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and that the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made by the claims and the summary of the invention should be included in the scope of the present invention. It is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title of the invention are provided for assisting the search of patent documents and are not intended to limit the scope of the invention.
Description of reference numerals:
100. 200, 400: projection device
110_1, 110_2, 210_1, 210_2, 310, 410_1, 410_ 2: light source module
120_1, 120_2, 220_1, 220_2, 420_1, 420_ 2: voltage sensor
130_1, 130_2, 230_1, 230_2, 430_1, 430_ 2: current sensor
140_1, 140_2, 240_1, 240_2, 440_1, 440_ 2: temperature sensor
150. 250, 450: brightness sensor
160. 260, 460: field programmable logic gate array
170. 270, 470: microprocessor
262. 462: signal mode converter
280. 480: selection circuit
290. 490: communication module
312: light emitting element string
314. 316, 318: shunt circuit
CW: color wheel
DM: shunting module
IS _1, IS _ 2: current signal
L1-L8: light emitting element
LS _1, LS _ 2: luminance signal
MS _1, MS _ 2: monitoring results
S510 to S530: step (ii) of
TS _1, TS _ 2: temperature signal
VS _1, VS _ 2: a voltage signal.
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