CN110873996A

CN110873996A - Projection device and monitoring method of light source module

Info

Publication number: CN110873996A
Application number: CN201811001127.XA
Authority: CN
Inventors: 吴建均; 彭致勋
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2020-03-10
Anticipated expiration: 2038-08-30
Also published as: CN110873996B

Abstract

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.

Description

Projection device and monitoring method of light source module

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 projection apparatus 100 includes light source modules 110_1 and 110_2, voltage sensors 120_1 and 120_2, current sensors 130_1 and 130_2, temperature sensors 140_1 and 140_2, a brightness sensor 150, a Field Programmable Gate Array (FPGA) 160, and a microprocessor 170. At least one of the light source modules 110_1 and 110_2 may have one or more light emitting elements. The light emitting element may be implemented by, for example, a laser diode (laser diode), but is not limited thereto, and may also be implemented by, for example, a Light Emitting Diode (LED), a bulb, or other electronic elements capable of emitting light. For the light source module 110_1, when the light source module 110_1 is driven, the voltage sensor 120_1 coupled to the light source module 110_1 senses a voltage signal VS _1 generated when the light source module 110_1 is driven. The current sensor 130_1 coupled to the light source module 110_1 senses a current signal IS _1 generated when the light source module 110_1 IS driven. The temperature sensor 140_1 senses a temperature signal TS _1 generated by the light source module 110_1 when driven. The luminance sensor 150 senses a luminance signal LS _1 generated when the light source module 110_1 is driven.

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 luminance sensor 150 senses a luminance signal TS _2 generated when the light source module 110_2 is driven. That IS, when the light source module 110_1 IS driven, the projection apparatus 100 can sense the voltage signal VS _1, the current signal IS _1, the temperature signal TS _1, and the brightness signal LS _1 of the light source module 110_ 1. When the light source module 110_2 IS driven, the projection apparatus 100 can sense the voltage signal VS _2, the current signal IS _2, the temperature signal TS _2, and the brightness signal LS _2 of the light source module 110_ 2. The light source module of the present invention may be one or more, and is not limited fixedly.

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 luminance sensor 150 senses a luminance signal LS _1 when the light source module 110_1 is driven. The actual light emitting performance of the light source module 110_1 when driven is obtained according to the temperature signal TS _1 or/and the luminance signal LS _ 1. In this way, after the projection apparatus 100 receives the voltage signal VS _1, the current signal IS _1, the temperature signal TS _1, and the brightness signal LS _1, the actual light emitting performance and the actual electrical performance of the light source module 110_1 when being driven can be intuitively obtained.

In the present embodiment, the field programmable gate array 160 is coupled to the voltage sensors 120_1 and 120_2, the current sensors 130_1 and 130_2, the temperature sensors 140_1 and 140_2, and the brightness sensor 150. The field programmable gate array 160 receives 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 brightness signals LS _1 and LS _ 2. In the embodiment, the fpga 160 receives 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 at different monitoring times, so as to obtain performance results of the light source modules 110_1 and 110_2 at different monitoring times. For example, when the light source module 110_1 IS driven at the first monitoring time, the voltage sensor 120_1 senses the voltage signal VS _1, the current sensor 130_1 senses the current signal IS _1, the temperature sensor 140_1 senses the temperature signal TS _1, and the brightness sensor 150 senses the brightness signal LS _ 1. The fpga 160 receives the voltage signal VS _1, the current signal IS _1, the temperature signal TS _1, and the brightness signal LS _1 at the first monitoring time to obtain the performance result of the light source module 110_1 at the first monitoring time. It should be understood that when the light source module 110_2 IS driven at the second monitoring time, the voltage sensor 120_2 senses the voltage signal VS _2, the current sensor 130_2 senses the current signal IS _2, the temperature sensor 140_2 senses the temperature signal TS _2, and the brightness sensor 150 senses the brightness signal LS _ 2. The fpga 160 also receives the voltage signal VS _2, the current signal IS _2, the temperature signal TS _2, and the brightness signal LS _2 at the second monitoring time to obtain the performance result of the light source module 110_2 at the second monitoring time.

The monitoring time may be during the period when the projection apparatus 100 is turned on and/or during the period when the projection apparatus 100 is turned off. That IS, the fpga 160 may be instructed (e.g., by the microprocessor 170) to receive 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 brightness signals LS _1 and LS _2 during the period when the projection apparatus 100 IS turned on and/or during the period when the projection apparatus 100 IS turned off.

In some embodiments, the field programmable gate array 160 includes a scratch pad (not shown). The register IS used for storing 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 received by the fpga 160.

The microprocessor 170 is coupled to the field programmable gate array 160. The microprocessor 170 provides the monitoring result MS _1 corresponding to the light source module 110_1 according to the voltage signal VS _1, the current signal IS _1, the temperature signal TS _1 and the brightness signal LS _1, and provides the monitoring result MS _2 corresponding to the light source module 110_2 according to the voltage signal VS _2, the current signal IS _2, the temperature signal TS _2 and the brightness signal LS _ 2. The microprocessor 170 of the present embodiment may be, for example, a Central Processing Unit (CPU), or other programmable general purpose or special purpose Processor, a Digital Signal Processor (DSP), a programmable controller, an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or other similar devices or combinations thereof, which can be loaded with and execute a computer program.

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 projection apparatus 100, the microprocessor 170 obtains the temperature rising trend, the brightness falling trend and the voltage and current variation trend by 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 brightness signals LS _1 and LS _2 received at different monitoring times to provide the monitoring results MS _1 and MS _2 corresponding to the light source modules 110_1 and 110_ 2.

The microprocessor 170 can obtain the characteristic degradation trend of the light source modules 110_1 and 110_2 according to the element characteristic curves of the light emitting elements in the light source modules 110_1 and 110_ 2. Next, 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 are compared to the characteristic degradation trend for calculation, so as to provide the monitoring results MS _1 and MS _2 of the light source modules 110_1 and 110_ 2. The characteristic curve of the light-emitting device may be provided by the supplier of the light-emitting device or a database created by the product development end of the projection apparatus 100. In some embodiments, the microprocessor 170 may include a storage unit (not shown). The storage unit is used for storing the lookup table. The lookup table is used for storing a plurality of voltage values, a plurality of current values, a plurality of temperature values, a plurality of brightness values and characteristic degradation trends corresponding to the voltage values, the current values, the temperature values and the brightness values. After receiving 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 from the fpga 160, the microprocessor 170 provides the monitoring result MS _1 corresponding to the voltage signal VS _1, the current signal IS _1, the temperature signal TS _1, and the luminance signal LS _1, and provides the monitoring result MS _2 corresponding to the voltage signal VS _2, the current signal IS _2, the temperature signal TS _2, and the luminance signal LS _2 according to a plurality of characteristic degradation trends of the lookup table. Accordingly, the monitoring result MS _1 may be used to represent a state of the light source module 110_1 when being driven (first monitoring time). For example, the monitoring result MS _1 may be used to indicate whether the light source module 110_1 is in a normal state, an abnormal state, or a state performance at the first monitoring time. Likewise, the monitoring result MS _2 may be used to indicate the state of the light source module 110_1 when being driven (at the second monitoring time). For example, the monitoring result MS _2 may be used to indicate whether the light source module 110_2 is in a normal state, an abnormal state, or a state performance at the second monitoring time. The storage unit of the present embodiment may be any type of fixed or removable Random Access Memory (RAM), read-only memory (ROM), flash memory (flash memory), or the like, or a combination thereof.

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 microprocessor 170 may also estimate the lifetime of the light emitting devices in the light source modules 110_1 and 110_2 according to the monitoring results MS _1 and MS _2, respectively, and further provide half-life warning information associated with the light source modules 110_1 and 110_2 when the luminance is lower than 50% of the luminance specification of the light emitting devices when the light emitting devices are not used completely.

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 projection apparatus 200 further includes a selection circuit 280. The selection circuit 280 is coupled to the field programmable gate array 260, the voltage sensors 220_1 and 220_2, the current sensors 230_1 and 230_2, and the temperature sensors 240_1 and 240_ 2. In some embodiments, the selection circuit 280 may be configured between the field programmable gate array 260 and the voltage sensors 220_1, 220_2, the current sensors 230_1, 230_2, and the temperature sensors 240_1, 240_ 2. The fpga 260 receives at least one of the voltage signals VS _1 and VS _2, the current signals IS _1 and IS _2, and the temperature signals TS _1 and TS _2 in a time-sharing manner through the selection circuit 280.

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 selection circuit 280 can receive the voltage signal VS _1, the current signal IS _1 and the temperature signal TS _1 generated at this time point. Next, the selection circuit 280 provides the voltage signal VS _1, the current signal IS _1, and the temperature signal TS _1 to the field programmable gate array 260. When the light source module 210_2 IS driven, the selection circuit 280 can receive the voltage signal VS _2, the current signal IS _2 and the temperature signal TS _2 generated at this time point. Next, the selection circuit 280 provides the voltage signal VS _2, the current signal IS _2, and the temperature signal TS _2 to the field programmable gate array 260. In this way, the number of wiring connections of the fpga 260 can be effectively reduced. In this embodiment, the selection circuit 280 can be implemented by at least one multiplexer.

In this embodiment, the field programmable gate array 260 includes a signal pattern converter 262. The signal mode converter 262 IS coupled to the voltage sensors 220_1 and 220_2, the current sensors 230_1 and 230_2, and the temperature sensors 240_1 and 240_2, and IS used for converting the voltage signals VS _1 and VS _2 in the form of analog signals into the voltage signals VS _1 and VS _2 in the form of digital signals, converting the current signals IS _1 and IS _2 in the form of analog signals into the current signals IS _1 and IS _2 in the form of digital signals, and converting the temperature signals TS _1 and TS _2 in the form of analog signals into the temperature signals TS _1 and TS _2 in the form of digital signals. In some embodiments, the signal pattern converter 262 may be disposed between the FPGA 260 and the selection circuit 280, and coupled to the voltage sensors 220_1, 220_2, the current sensors 230_1, 230_2, and the temperature sensors 240_1, 240_2 through the selection circuit 280.

In this embodiment, the projection apparatus 200 further includes a communication module 290. The communication module 290 may be coupled to the microprocessor 270. The communication module 290 is used for transmitting the monitoring results MS _1 and MS _ 2. Further, the communication module 290 can send the monitoring results MS _1 and MS _2 to an external electronic device (e.g., a system host, a server, etc.) in a wired or wireless manner. The electronic device can establish a database by the collected monitoring results MS _1, MS _ 2. In addition, the electronic device can also provide the projection apparatus 200 with the related service information corresponding to the monitoring results MS _1 and MS _2 according to the monitoring results MS _1 and MS _ 2. The projection device 200 can receive the related service information from the electronic device through the communication module 290. Therefore, on the premise that the projection apparatus 200 is capable of supporting the Internet of Things (IoT), the electronic apparatus can obtain the corresponding related service information by the monitoring results MS _1 and MS _2 to provide appropriate service countermeasures. In this way, the user experience of the projection apparatus 200 can be optimized for the user. For the product development side, the monitoring results MS _1, MS _2 can be collected to build up a database. For the customer service end, the monitoring results MS _1 and MS _2 predict the usage status of the light source modules 210_1 and 210_2 in advance to obtain the corresponding related service information to provide appropriate service countermeasures, so as to reduce the customer service cost.

In some embodiments, the communication module 290 is disposed inside the microprocessor 270.

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 luminance sensor 250 and the microprocessor 270, please refer to the implementation details of the voltage sensors 120_1 and 120_2, the current sensors 130_1 and 130_2, the temperature sensors 140_1 and 140_2, the luminance sensor 150 and the microprocessor 170 in fig. 1, which will not be repeated.

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 light source module 310 includes a light emitting device string 312 and a shunting module DM, wherein the shunting module DM is coupled to the light emitting device string 312. In this embodiment, the light emitting element string 312 has a first light emitting portion, a second light emitting portion and a third light emitting portion, the first light emitting portion includes at least one first light emitting element, the second light emitting portion includes at least one second light emitting element, and the third light emitting portion includes at least one third light emitting element. Specifically, in the present embodiment, the light emitting device string 312 includes a first light emitting portion composed of first light emitting devices L1, L2, L3, and L4 connected in series, a second light emitting portion composed of second light emitting devices L5, L6, L7, and L8 connected in series, and a third light emitting portion composed of first light emitting devices L3 and L4 connected in series, and second light emitting devices L5 and L6 connected in series. In this embodiment. In the present embodiment, the shunt module DM may include a first shunt circuit 314, a second shunt circuit 316, and a third shunt circuit 318. In the present embodiment, the first shunt circuit 314 is connected in parallel with the first light emitting portion (i.e. the first light emitting elements L1, L2, L3, L4 connected in series), so as to form a pair of first connection points (i.e. at the anode of the first light emitting element L1 and at the cathode of the first light emitting element L4) on the light emitting element string 312; the second shunt circuit 316 is connected in parallel with the second light emitting part (i.e. the second light emitting elements L5, L6, L7 and L8 connected in series), so as to form a pair of second connection contacts (i.e. the anode of the second light emitting element L5 and the cathode of the second light emitting element L8) on the light emitting element string 312; the third shunt circuit 318 is connected in parallel with the third light emitting part (i.e., the first light emitting elements L3, L4 and the second light emitting elements L5 and L6 connected in series), and forms a pair of third connection points (i.e., at the anode of the first light emitting element L3 and at the cathode of the second light emitting element L6) on the light emitting element string 312.

In the present embodiment, during the driving of the light source module 310, the first shunt circuit 314, the second shunt circuit 316, and the third shunt circuit 318 may be controlled to be turned on to provide a first shunt path, a second shunt path, or a third shunt path of the light source module 310. First shunt circuit 314, second shunt circuit 316, and third shunt circuit 318 of the present embodiment may be implemented by transistor switches. Further, the first shunt circuit 314 may be turned on to provide a first shunt path and bypass (bypass) the first light emitting elements L1 to L4. When the first shunt path is provided, the voltage sensor senses a first voltage signal generated by the second light emitting part (i.e., the second light emitting elements L5 to L8 connected in series), the current sensor senses a first current signal generated by the second light emitting part, the temperature sensor senses a first temperature signal generated by the second light emitting part, and the luminance sensor senses a first luminance signal generated by the second light emitting part. Thus, when the first shunt path is provided, the projection apparatus can obtain the first voltage signal, the first current signal, the first temperature signal and the first brightness signal associated with the second light emitting elements L5-L8.

Similarly, the second shunt circuit 316 is turned on to provide a second shunt path, and the projection apparatus can obtain a second voltage signal, a second current signal, a second temperature signal and a second brightness signal associated with the first light-emitting elements L1-L4. In association with the third shunt circuit 318 being turned on to provide a third shunt path, the projection apparatus may obtain a third voltage signal, a third current signal, a third temperature signal, and a third brightness signal of the first light emitting elements L1, L2 and the second light emitting elements L7, L8. In this way, the light source module 310 can obtain the actual light emitting performance and the actual electrical performance of the partial light emitting elements through the first shunt circuit 314, the second shunt circuit 316 and the third shunt circuit 318. The light source module 310 of the present embodiment can be applied to the projection apparatus 100 of fig. 1 and the projection apparatus 200 of fig. 2.

Fig. 4 is a schematic view of a projection apparatus according to a third embodiment of the invention. Unlike fig. 2, the projection apparatus 400 of fig. 4 further comprises a color wheel CW. The color wheel CW is used for generating the light provided by the light source modules 410_1 and 410_2 into a plurality of different color lights. The color wheel CW has a plurality of phosphors or filters for generating light into a plurality of different colors. The color wheel CW is disposed between the brightness sensor 450 and the light source modules 410_1 and 410_2, so that the brightness sensor 450 senses the brightness of the light sources 410_1 and 410_2 corresponding to the different color lights to generate brightness signals corresponding to the different color lights.

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 luminance sensor 450 senses the luminance signal of the red light at the first sub-time, and the field programmable gate array 460 receives the luminance signal of the red light at the first sub-time. The brightness sensor 450 senses the brightness signal of the yellow light at the second sub-time, and the field programmable gate array 460 receives the brightness signal of the yellow light at the second sub-time. The brightness sensor 450 senses the brightness signal of the green light at the third sub-time, and the field programmable gate array 460 receives the brightness signal of the green light at the third sub-time. The luminance sensor 450 senses the luminance signal of the blue light at the fourth sub-time, and the field programmable gate array 460 receives the luminance signal of the blue light at the fourth sub-time. In this way, the brightness signal received by the fpga 460 is the brightness signal corresponding to the actual display result. Therefore, the monitoring results MS _1 and MS _2 can more intuitively correspond to the actual display result of the projection device.

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.

Claims

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,

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.