TWI386749B - Projecting device, light source module and driving method thereof - Google Patents

Description

Projector device, light source module and driving method thereof

The present invention relates to an electronic device, and more particularly to a projector device and a light source module and driving method thereof.

In the projector, an important component is the bulb. The projector's light bulb is a consumable. When the lamp hour has been reached and a new lamp needs to be replaced, the projector needs to be replaced with an original lamp that matches its design specifications. However, there are also manufacturers in the market who sell counterfeit light bulbs. The characteristics of the bulbs are different from those of the original bulbs, so they cannot match the design specifications of the projector. Moreover, such a counterfeit bulb does not match the circuit characteristics of the projector, and the counterfeit bulb may not meet the safety regulations related to the user's safety.

In this way, the user may use the counterfeit bulb because of the light. An accident in which the bubble is too hot and the bulb bursts is dangerous. Therefore, how to avoid the use of a bulb that does not conform to the original design in the process of designing the projector to improve the safety of use is one of the directions that we need to strive.

The invention relates to a projector device and a light source module and a driving method thereof, which can ensure that the light source module used is provided by the original factory and can improve the safety of use.

According to a first aspect of the present invention, a projector apparatus is provided comprising a system processor, a lighting fixture and a light source module. The light source module includes identification data. The system processor is configured to determine whether the micro-identification data satisfies a predetermined condition. When the identification data satisfies a predetermined condition, the system processor controls the lighting device to provide a driving electrical signal to enable the light source circuit.

According to a second aspect of the present invention, a driving method is provided for use in a projector apparatus for driving a light source module of a projector apparatus, the method comprising the following steps. Read one of the light source module identification data. It is judged whether the identification data satisfies the predetermined condition. When the identification data satisfies the predetermined condition, the enabling lighter provides a driving electrical signal to drive the light source module.

In order to make the above description of the present invention more comprehensible, a preferred embodiment will be described below in detail with reference to the accompanying drawings.

Referring to FIG. 1, a block diagram of a projector apparatus in accordance with an embodiment of the present invention is shown. The projector device 100 includes a system processor 120, The lighter 140 and the light source module 160. The system processor 120 provides a power on command ST. The light source module includes a light source circuit 162 and a light source control system 164. Light source control system 164 includes memory 164a and microcontroller 164b. The memory 164a stores the identification data ID. The microcontroller 164b accesses the memory 164a in response to the power-on command ST to provide the identification material ID.

The system processor 120 further determines whether the identification data ID provided by the microcontroller 164b satisfies a predetermined condition. When the identification data ID satisfies the predetermined condition, the system processor 120 controls the lighter 140 to provide the driving electrical signal Vs to enable the light source circuit 162. The light source circuit 162 includes, for example, a light bulb for providing a light source required by the projector apparatus 100.

The memory 164a is, for example, a non-volatile memory such as an Erasable Programmable Read Only Memory (EPROM) or a flash memory. In an example, the predetermined condition is a condition for determining that the identification material ID corresponds to the original preset data. The factory preset data is set by the designer of the projector device 100, for example, a serial number representing the light source module 160 in the original manufacturing process.

When the predetermined condition is satisfied, the light source module 160 having the identification data ID is a module provided by the original factory. Preferably, when the predetermined condition is met, the system processor 120 further provides a modification command CM to the microcontroller 164b to control the microcontroller 164b to modify the value of the identification data ID.

The projector device 100 of the embodiment further includes a detecting circuit 180 for detecting an operating parameter of the light source circuit 162. The detecting circuit 180 periodically detects the light source circuit 162 at an operating time point under the control of the system processor 120 to obtain operating parameters corresponding to the operating time point.

The system processor 120 stores the operational parameters and determines whether the operational parameters and the operational parameters stored at the previous operational point of time satisfy the error condition. In one embodiment, system processor 120 stores operational parameters, for example, in memory 164a at the end of light source control system 164. However, the system processor 120 is not limited to storing operational parameters in the memory 164a, but may be stored in other memory in the projector device 100. For example, the system processor 120 can store the operating parameters in a memory (not shown) accessed by the system processor 120. In other words, it is within the scope of the present invention to determine whether the error condition is satisfied by the stored operating parameters. When the operating parameter meets the error condition, the system processor 120 further triggers an error event to notify the user that the light source circuit 162 is abnormal at this time, and if necessary, the light source circuit 162 is disabled (for example, the driving signal Vs is stopped). Extinguish the lamp) to improve the safety of use. In this embodiment, the detection circuit 180 can be implemented by different architectures, and the error conditions and error events corresponding thereto can have different types, which will be described below with a plurality of examples.

Please refer to FIG. 2A , which is a schematic diagram showing an example of a position of a brightness sensor in a detection circuit in a projector device. In the first example, the detection circuit 180 includes a brightness sensor LS disposed on the optical path L of the light source circuit 162 for sensing the brightness of the enabled light source circuit 162 to obtain the brightness corresponding to the light source circuit 162. Operating parameters. In this example, the brightness sensor LS can be implemented, for example, by a photo diode to excite a current corresponding to the brightness of the bulb under illumination of the bulb. The system processor 120 is further configured to convert the current generated by the photodiode into a current The value is stored in the memory 164a as an operational parameter.

In general, the brightness provided by the bulb has diminishing physical properties during use. That is, as the bulb is used for a longer period of time, the brightness of the bulb will become darker and darker (even under the same driving conditions). Therefore, if the new bulb is not replaced, the brightness of the bulb will decrease, and the current sensed by the brightness sensor LS and the current value obtained by the conversion will also decrease. Therefore, in this example, the error condition is that the system processor 120 determines that the currently obtained current value is greater than the current value stored at the previous time point, and may be, for example, an event of the current value stored at the previous operating time point.

Please refer to FIG. 2B, which is a block diagram of a voltage conversion circuit in the detection circuit. In the second example, the detecting circuit 180 includes a voltage converting circuit VC for performing voltage conversion on the driving electrical signal Vs to obtain an operating parameter corresponding to the signal level of the driving electrical signal VS.

In this example, the voltage conversion circuit VC can be implemented, for example, by an analog-to-digital converter for converting the driving electrical signal Vs generated by the lighting device 140 (for example, an analog voltage) into a digital voltage value, and using the digital voltage value as Operating parameters. In general, the brightness value of a light bulb has declining physical properties during use, and the voltage required to drive the light bulb is becoming higher and higher. Therefore, in this example, the error condition is that the system processor 120 determines that the currently obtained digital voltage value is less than the digital voltage value stored at the previous time point, and may be, for example, the digital voltage value stored at the previous operation time point. The event.

In the third example, the lighting fixture 140 and the voltage conversion circuit VC in the second example are integrated in a one-light board. Lighting board package The microcontroller is configured to process the digital voltage value obtained by the voltage conversion circuit VC. Therefore, by performing data transfer between the microcontroller and the system processor 120, it is also possible to determine whether an error condition is satisfied.

In the fourth example, the detection circuit includes a timer circuit for calculating an operation time for enabling the light source circuit 162 to obtain an operation parameter corresponding to the operation time of the light source circuit 162. In this example, the system processor 120 has, for example, a look-up table, which stores the correspondence between the operation time of the light bulb and the operating parameters (such as the current value related to the brightness or the digital voltage value). . In this way, the system processor 120 can obtain the current value (related to the brightness of the light source circuit 162) or the digital voltage value corresponding to each operation time by looking up the table, and the current value or the digital voltage value and the detection according to the look-up table. The current value or the digital voltage value measured by the circuit is compared to determine whether the error condition is satisfied, that is, if the measured operating parameter at a certain time point and the operating parameter corresponding to the look-up table corresponding to the time point are greater than a predetermined value, then It is determined that the error condition is satisfied.

In one example, the light source control system 164 further includes an encoding circuit for encoding the identification data ID provided by the microcontroller 164b and providing the encoded identification data ID to the system processor 120. Furthermore, the light source control system 164 further includes a communication interface and is coupled to the system processor 120 via a communication link. This communication link can be a wired or wireless communication link. The light source control system 164 can encode the identification data ID by using an encoding circuit and transmit the encoded identification data ID to the system processor 120 via the communication interface. In this manner, the system processor 120 decodes the encoded identification data ID to obtain the identification data stored in the memory 164a. ID.

In practice, the light source control system is, for example, architected in a System on Chip (SOC). In this way, when the light source control system transmits the data to the system processor, the obtained data (such as identification data) is obtained, and the confidentiality of the data can be increased, so that the security of the system can be further improved.

Further, the present invention further proposes a driving method applied to the projector device 100 of Fig. 1. Referring to FIGS. 3A and 3B, a flow chart of an example of a driving method performed by a projector device according to an embodiment of the present invention is shown. The driving method includes the following steps. In step S301, the system processor reads the identification data in the light source module. In one example, the system processor provides a power-on command to the light source module, and the light source module provides identification data in response to the power-on command for reading. In step S302, it is determined whether the identification material satisfies a predetermined condition. When the identification data does not satisfy the predetermined condition, step S310 is performed, and when the identification data satisfies the predetermined condition, step S303 is performed. In step S303, the enabling lighter provides a driving electrical signal to drive the light source module. Next, in step S304, a modification command is provided to the light source module to control the light source module to modify the value of the identification data.

In step S305, the operating parameters provided by the detecting circuit are received. Next, in step S306, it is determined whether there is an operation parameter stored at a previous time point. If yes, go to step S309, if no, go to step S307. In step S307, the operating parameters are stored in the light source module. Then, in step S308, the operating parameters provided by the detecting circuit are received. Next, in step S309, it is determined whether the operation parameter and the operation parameter stored at the previous time point satisfy the error condition. When the error condition is not satisfied, step S307 is performed. When the error is met When the condition is met, step S310 is performed to trigger an error event.

Referring to FIGS. 4A and 4B, a flow chart of another example of a driving method performed by a projector device according to an embodiment of the present invention is shown. The driving method includes the following steps. Steps S401 to S404 are similar to steps S301 to S304 of FIG. 3A, and therefore are not described again. In step S405, the detecting circuit detects an operating parameter of the light source circuit. Next, in step S406, the operating parameters are stored in the light source module. Then, in step S407, the operation time for enabling the light source circuit is calculated. Next, in step S408, an operation parameter corresponding to the operation time is obtained by querying the lookup table. In step S409, it is determined whether the operation parameter measured according to the corresponding operation time in the comparison table and the operation parameter measured by the detection circuit satisfy the error condition. When the error condition is not satisfied, step S405 is performed. When the error condition is satisfied, step S410 is performed to trigger an error event.

If the operation parameter satisfies the error condition, it can be judged that an error occurs during the operation of the projector device, and an error event is triggered. Therefore, if the projector device is replaced with a light bulb and the light bulb is not an original light bulb compatible with the projector device, the system processor determines that the error condition is satisfied to notify the user that the light bulb of the projector device is abnormal, if necessary. It is also possible to disable the light source module of the projector device (such as extinguishing the light bulb) to improve the safety of use.

In the projector device disclosed in the above embodiments of the present invention, it is ensured that the light source module used is provided by the original manufacturer by determining whether the identification data stored in the light source module meets a predetermined condition. Moreover, the safety of use is also improved by judging whether the operating parameters of the bulb satisfy the error condition.

In summary, although the present invention has been disclosed above in a preferred embodiment, It is not intended to limit the invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Projector unit

120‧‧‧System Processor

140‧‧‧Lighting

160‧‧‧Light source module

162‧‧‧Light source circuit

164‧‧‧Light source control system

S301~S310, S401~S410‧‧‧ Process steps

1 is a block diagram of a projector apparatus in accordance with an embodiment of the present invention.

FIG. 2A is a schematic diagram showing an example of a position of a brightness sensor in a detection circuit in a projector device.

FIG. 2B is a schematic diagram showing an example of a voltage conversion circuit in the detection circuit.

3A and 3B are flow charts showing an example of a driving method applied to a projector device according to an embodiment of the present invention.

4A and 4B are flow charts showing another example of a driving method applied to a projector device according to an embodiment of the present invention.

100‧‧‧Projector unit

120‧‧‧System Processor

140‧‧‧Lighting

160‧‧‧Light source module

Claims (20)

A projector device comprising: a lighter; a light source module comprising: a light source circuit; and a light source control system comprising an identification data; and a system processor for reading and determining whether the identification data is satisfied a predetermined condition, when the identification data satisfies the predetermined condition, the system processor controls the lighter to provide a driving electrical signal to enable the light source circuit; wherein the predetermined condition corresponds to an original factory preset data. The projector device of claim 1, wherein the light source control system further comprises a memory for storing the identification data. The projector device of claim 2, wherein the light source control system further comprises a microcontroller for accessing the memory, the microcontroller further providing the identification data in response to a power-on command, Read by the system processor, wherein the boot command is provided by the system processor. The projector device of claim 1, wherein when the identification data satisfies the predetermined condition, the system processor further provides a modification command to the light source module to control the light source module to modify the identification data. The value. The projector device of claim 1, further comprising: a detecting circuit for detecting an operating parameter of the light source circuit; The system processor stores the operation parameter, and determines whether the operation parameter and an operation parameter stored at a previous operation point satisfy an error condition. When the operation parameter satisfies the error condition, the system processor is further configured to trigger. An error event. The projector device of claim 5, wherein the light source control system further comprises a memory for storing the identification data, wherein the operating parameter is stored in the memory. The projector device of claim 5, wherein the detecting circuit comprises: a brightness sensor disposed on the optical path of the light source circuit for sensing the brightness of the light source circuit enabled to The operational parameter corresponding to the brightness of the light source circuit is obtained. The projector device of claim 5, wherein the detecting circuit comprises: a voltage converting circuit for performing voltage conversion on the driving electrical signal to obtain a signal level corresponding to the driving electrical signal The operating parameters. The projector device of claim 1, further comprising: a detecting circuit for detecting an operating parameter of the light source circuit; and a timing circuit for calculating one of the enabling of the light source circuit Operating time, wherein the projector device further stores an operation time and operation parameter comparison table, and compares the operation table by the operation time calculated by the timing circuit The operation parameter corresponding to the operation time and the operation parameter measured by the detection circuit meet an error condition, and when the operation parameter satisfies the error condition, the system processor is further used to trigger an error event. The projector device of claim 1, wherein the light source control system further comprises: an encoding circuit for encoding the identification data and providing the encoded identification data to the system processor. The projector device of claim 1, wherein the light source control system further comprises: a communication interface connected to the system processor via a communication link. The projector device of claim 1, wherein the light source control system is embodied in a system on chip (SOC). A driving method is applied to a projector device to drive a light source module of the projector device, the driving method comprising: (a) reading one of the light source module identification data; and (b) determining the identification data Whether a predetermined condition is met; and (c) when the identification data satisfies the predetermined condition, enabling the lighter to provide a driving electrical signal to drive the light source module; wherein the predetermined condition corresponds to an original factory preset data. The method of claim 13, wherein the step (a) further includes: providing a boot command to the light source module, wherein the light source module provides the identification data in response to the boot command for providing Read. The method of claim 13, wherein after the step (c), the method further comprises: (d) providing a modification command to the light source module to control the light source module to modify the value of the identification data. As in the method of claim 13, in step (b), when the identification data does not satisfy the predetermined condition, an error event is triggered. The method of claim 13, further comprising: (c') detecting an operating parameter of the light source module by a detecting circuit; (d) determining whether the operating parameter and an operating parameter of a previous time point are An error condition is satisfied; and (e) an error event is triggered when the operational parameter and the operational parameter of the previous time point satisfy the error condition. The method of claim 17, further comprising: (f) storing the operational parameter. The method of claim 18, further comprising: (e) performing step (f) when the operating parameter and the operating parameter stored at the previous time point do not satisfy the error condition. The method of claim 13, further comprising: (c') detecting an operating parameter of the light source module by a detecting circuit; (c) storing the operating parameter; (d) calculating the The light source module is driven for one operation time, and judges whether the operation parameter corresponding to the operation time in a comparison table and the operation parameter measured by the detection circuit at the operation time satisfy an error bar. And (e) trigger an error event when the error condition is met.