TWI249646B - Heat dissipation system and method for projector - Google Patents

Abstract

This invention relates to a heat dissipation system and method for a projector, including: a power storage device in the projector, where the power storage device would supply power to the heat dissipating device in a timely manner after turning off the light source of the projector such that external power source cannot supply power to a power conversion device of the projection thereby preventing from supplying power source to the heat dissipating device, so as to maintain operation of the heat dissipating device for continuously heat dissipation of the light source. This invention prevents heat dissipating process of the light source from being affected by the external power source to thereby prolong service life of the light source.

Description

1249646 V. DESCRIPTION OF THE INVENTION α) [Technical Fields of the Invention] The present invention relates to an external electric circuit in particular to ensure projection life. [Prior Art] In today's work presentations and briefings, however, all need to be fully upgraded, so that the development of the development and the simplification of the implementation of the speech can be said to be the small amount of the briefer, how easy it is to carry, how loud Etc., in the briefing, the current high-pressure mercury lamp used in the projector, although the heat, so one of the points, is currently emitting heat, but the light will cause great damage to eliminate the light source for an appropriate time to help the field] About a projector The heat dissipation system and the heat dissipation method, the heat dissipation system and the square light source when the source cannot be supplied to the projector can be completely dissipated after the use is turned off, and the heat is increased, and it is difficult to prepare, and many meritors, such as a good helper, use the function. In order to improve the light source of the light source, the Qi light is turned off, the heat is reduced, and the heat dissipation is required. The company needs to prepare the notebook type with considerable energy consumption. Nowadays, it is not subject to full brightness, brightness and brightness. After the time, the use of the Shouguang source to improve the internal, time-consuming, and multi-media program computer and The projection of the terrain image is required for external sound effects, but it will be immediately saved after being turned into a target. After being turned off, the inside of the illumination source or the customer will make a brief report on the subject, which will help the projector to sound louder, and only the device will play more. The current projection starts the heat dissipation, and it will still use the external customer briefing or technical standard products. Now, there are rich and fresh walls, such as electric and convenient source bulbs, which will develop the projection of the heat source of the heat fan. Wind life, the user's performance is a lecture, the system can be easily projected, the body, the body, the brain, the sounds are mostly made of high standards, and the machine is still running for the fan.

1249646 V. INSTRUCTIONS (2) For most users, the importance of subsequent heat dissipation is unknown. After the projector is used, the power plug is directly removed, causing the cooling fan to fail to operate, resulting in incomplete heat recovery. Excluding, and reducing the service life of the light source, or when the cooling fan is in the final operation of heat dissipation, inadvertently being pulled out by other people, it will cause the same problem. Therefore, the present invention provides a heat dissipation system and a heat dissipation method for a projector in response to the above problems, and can supply a power source to operate the heat dissipation device when the external power source is not supplied to the projector, and dissipate the heat source to solve the problem. The above question. SUMMARY OF THE INVENTION The main purpose of the present invention is to install a power storage device inside the projector, so that when the external light source cannot supply power to the heat sink after the light source is turned off, the power storage device can supply power to maintain the heat sink. Run, heat dissipation, and improve the service life of the light source. Another object of the present invention is to supply power to a power storage device for charging when an external power source normally supplies power to the projector. Another object of the present invention is to control the rotational speed of the heat sink and improve the heat dissipation effect of the light source. The heat dissipation system of the projector of the present invention comprises at least one heat dissipating device, a power conversion device, a power storage device, a switch module and a micro processing unit, and the power conversion device receives an external AC power conversion output DC power supply to the heat dissipation device. The heat sink is operated to dissipate heat from the light source, the micro processing unit controls the power conversion device and the switch module, and the switch module is controlled to be stored and closed.

1249646 V. INSTRUCTIONS (3) The power supply status of the electric device. When no external power supply is supplied to the power conversion device, the power storage device supplies power to the heat sink to keep the heat sink running, and complete the subsequent heat dissipation process for the light source. Improve the service life of the light source. The heat dissipation method of the projector of the present invention is that the projector is provided with a power storage device, and after the light source of the projector is turned off, one of the external power sources receives a power conversion device to supply power to the heat sink to dissipate the light source. When the external power source is not supplied with power to the power conversion device, the power storage device will immediately supply power to the heat sink, keep the heat sink running, and dissipate heat from the light source, thereby increasing the service life of the light source. In order to provide a better understanding and understanding of the structural features and the achievable effects of the present invention, the preferred embodiments and the detailed description are as follows: [Embodiment] The present invention is The power storage device is installed inside the projector. When no external power supply is provided, the power supply device can supply power to the heat dissipation device to keep the heat dissipation device running, and heat the illumination source of the projector to improve the illumination source. The service life. Referring to the first figure, the present invention comprises a power conversion device 10, which receives an external power source 15 and converts the AC power into a DC power source and supplies it to each component device of the projector; a light source stabilizer 20 provides The stable working power supply is provided to a light source 2 5 , and the light source 2 5 can be a light bulb; at least one heat sink 30 can be a heat dissipation fan for dissipating heat to the light source 25; at least one

1249646 V. INSTRUCTIONS (4) ^- Power storage device 40 for supplying DC power, heat sink 3, and other important equipment. The power storage device 4 can be a rechargeable battery. ^ A switch module 50 controls the state of the power storage device 4 〇 transmission power, the switch module 50 includes a power management unit 52, and the power management unit 7'2 is disposed in a micro processing unit 65 of a circuit board 60. Drive, power management unit ^ by detecting the voltage change of Ί resistor 5 3 'to detect whether there is current flow, and then to detect whether the power conversion device 供应 has a power supply, in the presence of power supply, the power supply The management unit 52 drives a charging switch 5 4 to conduct 'letting the power source through the charging switch 5 4 to charge the power storage device 40, and the power management unit 52 also knows by detecting the voltage change of the resistor 55. The electric capacity of the electric storage device 40 is charged or discharged. If the electric storage device 4 is fully charged, the power management unit 52 drives the charging switch 54 to turn off, and the storage device 40 stops charging. When the power management unit 52 detects that the power conversion device 1 has no power supply, it immediately drives a power switch 56 to turn on, discharges the power storage device 4, and supplies power to the heat sink 30 and the microprocessor unit 65. The diode 5 7 prevents the power conversion device 10 from being powered off, the current of the storage device 40 flows backward into the power conversion device 10, and the diode 58 supplies the storage device 40 with a fixed path and prevents other current from flowing. The switch module 50 can be integrated on the circuit board 60; a capacitor 70 is supplied to the micro processing unit 65 in a state where the power conversion device 1 is not supplied with power, and The pole body 7 5 can avoid the current of the capacitor 70 and flow backwards. The charging switch 54 and the power supply switch 56 can be a Field Effect Transistor (FET) or a Bipolar Junction Transistor (Bipolar Junction Transistor,

Page 8 1249646 V. Description of the invention (5) BJT). When the power plug of the projector is plugged into the socket and the external AC power source 15 flows into the power conversion device 1 ,, the projector is in a standby state, and at this time, the power conversion device 1 供应 supplies only the power to the microprocessor unit 65 of the circuit board 60. And 70 pieces necessary to receive the signal input of detecting the user pressing the remote control or pressing the power switch. When the user presses the power button or switch, the microprocessor will transmit the control signal to the power source. The switching device 1 以 starts to supply power to the ballast 20, and further drives the light source 25 to emit light, and supplies power to the heat sink 30 for heat dissipation of the light source 25 to operate, and the power management unit 52 also The charging switch 54 is turned on, so that the power source flows through the charging switch 54 to charge the power storage device 40, until the power management unit 52 measures that the power storage device 40 has sufficient power, that is, the charging switch 54 is turned off, Stop charging the power storage device 40, and when the power conversion device 1 is supplied with power, the discharge switch 56 is in a non-conducting state, and the above-mentioned projector state has entered positive The state of normal operation. When the user presses the button or switch of the power off after using the projector, the microprocessor unit 65 sends a control signal to the power conversion device 10' to drive the power conversion device 1 to stop supplying power to the ballast 2, That is, the power is turned off to the light source 25, but the power supply is continued to be supplied to the heat sink 3, and the heat dissipation step of the light source 25 is performed. At this time, the microprocessor unit 65 also charges the heat dissipation time of the heat sink 30. After the heat sink 30 reaches the preset heat time, the microprocessor unit 65 sends a control signal to the power conversion device 10, stops supplying power, stops the heat sink 30, and returns the projector to the standby state. The microprocessor unit 65 can be transported on the heat sink 3

Page 9 1249646 V. Invention description (6) When turning, the side control is detected as the light source segment, that is, the micro-processor external power supply is turned on. The device 4 will immediately follow the element 5 2 to detect the switch 5 6 Turning on, the polar body 5 8 to the heat-dissipating light source 2 5 is completed, and the storage unit 65 is turned off, and the heat is turned off until the micro-processing completes the heat-dissipation, and the power-on switch standby state is slightly turned off. After the rotation speed is increased, the fixed heat dissipation unit 6 5 has a predetermined heat dissipation to supply power to the power source, and the external power source 15 supplies power to the power source power conversion device 1 〇 no storage device 40 discharge device 30, the subsequent heat is performed to improve the power supply of the life-storing device 40, and the capacity of the micro-processing unit 65 is also received. The discharge supply unit 6 5 counts to the preset processing unit 65, the transmission control 56, and the power storage device is stopped. The heat dissipation effect of the light source 25. When the subsequent heat dissipation step is not reached, the switching device 10 is suddenly generated, or when the power of the projection power is interrupted, the power storage unit 52 is stored, and when the power management single power supply is output, the power supply is controlled. 'Power supply switch 56, two

The month is not hot enough to ensure life. It will be supplied to the micro-operation through the diode 75, and when the power conversion device 1 〇 powers to the micro-processing unit 65, such as the heat-dissipating time, that is, the illumination source 25 signal is supplied to the power management unit 5 2 4 0, and the projection Machine returns to

Please refer to the second figure, which is a circuit block diagram of another embodiment of the present invention. This embodiment is different from the previous embodiment in that the micro processing unit 6 5 can control the operation of the ballast 20 when the external power source 15 supplies power. When the power conversion device 10, that is, when the projector is in the standby state, the power conversion device 10 supplies power to the ballast 20 in addition to the power supply to the micro processing unit 65 of the circuit board 60 and its necessary components. When the power is turned on, the microprocessor unit 65 5 controls the power conversion device 1 to supply power to the light source 25 and the heat sink 30,

Page 10 1249646 V. Invention Description (7) The control signal is also sent to the user, and the user sends the control source 2 5 at the frequency of 6 5 to stop the illumination source. Please refer to the third figure. This embodiment is a simple difference from the above two implementations of the charging switch 8 2, after the control 82 is turned on and off the micro-processed button or switch, the switching device 10 and the power-on power supply switch 82 are turned on, the power storage device 40, discharge into the power supply conversion voltage difference, through the cleaning unit 65, until the micro light source completes the heat dissipation, micro 8 2, the power supply switch is turned off to the standby state. At 2 o'clock, the 8th of the storage device is used for the storage device 40. Please refer to the fourth picture. The application is also a simple version of the device = 2 裔 2 〇, driving the transmission power to the light source. After the button or the switch, the micro-processing single number and the 6 female device 20 are used to stop the supply of the power supply to the operation of the light-emitting device 25. The rest of the operation is the same as the circuit block diagram of the previous embodiment of the present invention. In the embodiment, the switch module 80 is a switch module 5 〇, and the switch module 8 is only powered by a power supply 40, and the charging switch is controlled by a user. Pressing the power to start the micro processing unit 65 will transfer the control signal to the power supply to turn off the power supply 8 2 ' to enable the power conversion device to supply power and let the day power supply device 1 供应 also supply power to the line to charge. When the power is not supplied, the power storage device 40 outputs power to the heat sink 3 and the micro processing unit 65 to the preset heat dissipation time, and the processing unit 65 sends a control signal to the power storage device 40. The power supply switch 8 2 stops the power supply of the power storage device 40, and the projector return bodies 84 and 86 prevent the power conversion device from flowing back to the power conversion device i 〇, the diode has a fixed path 'and avoids Other currents flow in. A circuit block diagram of still another embodiment of the present invention, the actual heat system is different from the previous embodiment in the micro processing 1249646. 5. The invention (8) The real unit 6 5 can control the operation of the ballast 20, and its control The method is as described in the example. If the heat sink 30 is a 12 volt / 〇 · 4 amps (12V / q hot fan, about 2 minutes to complete the light source 2 5 bulb 彳纟 2) heat dissipation and the required power is 5 · 67 mA amphenry (5.6, the concentrating device 40 is a rechargeable battery, the charge and discharge amount is 8〇% of the original, 'If the storage efficiency is 90%, then 7.8 mAh Henry (7. 88m〇A) is required. 'And the circuit is regulated to 1 · 2 volts / 1 800 0 ~ 2 2 0 0 milliamps Henry single ~ m Hl ' If the battery, you need to connect 10, so that can supply power to the surface, After the gas is charged, the heat dissipation stage is achieved, and the total weight of one Ni-MH rechargeable battery is 公, and the weight is not heavy; because the inside of the projector is high heat j is 250%, so the storage device 4 It is preferred to use a higher safety: the charge cell and the Li P〇iymer rechargeable battery, and the second = charge / η3 · 7 volts - so only three in series are used. = The projector of the present invention is described The heat dissipation system and the storage device 4 are installed inside the projector, so that the subsequent % 敎 ρ of the illuminating source 25 is turned off. When the source is in operation, it is impossible to continue to enter the rod 尨^, t, and the electrical life. After the heat transfer stage, the use of the light source 25 is reduced. The present invention is _ user, should conform to me: new head, Progressive can be? Industry patent application for the invention, > The patent application requirements are undoubtedly '爰 提出 μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ μ A preferred embodiment of the present invention is not in the scope of Besch, so the patent application is based on the present invention.

liMll Page 12 1249646

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention; FIG. 2 is a block diagram of another embodiment of the present invention; A circuit block diagram of an embodiment; and a fourth diagram is a circuit block diagram of still another embodiment of the present invention. Set 1 to change the source, say the source of the power, the source of the power, the external element, the main ο 5 [11

Page 14 20 Ballast 25 Light source 30 Heat sink 40 Power storage device 50 Switch module 52 Power management tra Early 兀 53 Resistor 54 Charging switch 55 Resistor 56 Power switch 57 Pole body 58 _ 丨 - Pole body 60 Circuit board 65 micro Processing unit 70 capacitor 1249646

Page 15

Claims (1)

1249646 VI. Patent application scope 1 · A heat dissipation system for a projector, which is configured to dissipate heat after at least one illumination source of the projector is turned off, the heat dissipation system comprising: at least one heat dissipation device for dissipating heat from the illumination source; a power conversion device receives and converts an external power supply to supply the power to the heat sink; a power storage device supplies power to the heat sink; a switch module controls the power supply to the heat sink; and a microprocessor The unit controls the power conversion device and the switch module. When the power conversion device is not powered, the power storage device supplies power to the micro processing unit and the heat dissipation device, so that the heat dissipation device completes heat dissipation of the illumination source. 2. The heat dissipation system of the projector of claim 1, wherein the heat sink is a heat dissipation fan. 3. The heat dissipation system of the projector of claim 1, wherein the power storage device is a rechargeable battery. 4) The heat dissipation system of the projector according to claim 1 of the patent application, wherein The switch module includes a power management unit, a charging switch and a power switch. The power management unit is controlled by the micro processing unit, and the power management unit detects the storage capacity of the power storage device, and controls the charging switch to open and close. Controlling the power conversion device to charge the power storage device, the power management unit controls the power supply switch to open and close, the power supply switch is turned on when the power conversion device is not supplied with power, and the power storage device supplies power to the micro processing unit and The heat sink. The invention relates to a heat dissipation system of a projector according to claim 1, wherein the switch module comprises a power supply switch controlled by the micro processing unit to open and close, the power conversion device When no power is supplied, the power storage device supplies power to the micro processing unit and the heat sink. 6. The heat dissipation system of the projector of claim 5, wherein the power conversion device further supplies power to the power storage device for charging. 7. The heat dissipation system of the projector of claim 1, further comprising a ballast through which the power conversion device supplies power to the heat sink. The heat dissipation system of the projector of claim 7, wherein the ballast is controlled by the microprocessor unit. 9. The heat dissipation system of the projector of claim 1, wherein the power conversion device receives an external AC power source and converts the output DC power. The heat dissipation system of the projector according to claim 1, wherein the micro processing unit counts the heat dissipation time of the heat dissipation device, and after reaching a proper heat dissipation time, the switch module is driven to be turned off and stopped. The power storage device supplies power to the heat sink. II. A heat dissipation method for a projector, which is provided with a power storage device in a projector, wherein at least one illumination source of the projector is turned off, the projector receives a power conversion device of an external power source, and supplies power to the projector At least one heat dissipating device of the projector, dissipating heat from the light source, and when the power converting device supplies no power to the heat dissipating device, the power storage device supplies Page 17 1249646 VI. The scope of application for patents is legal. Dissipate the heat of the machine into the source of the light to report the issue of the pair, the first set of the surrounding Fan Fanli special should be sent to Shenyuan, such as electricity, the assembly will be replaced by the source of electricity, the source of electricity should be supplied In the storage and replacement of the source device ^3⁄4 a £1 该 0 in the store, the electric charge travels its steps, the 1 method has a hot package, and the machine heat transfer is described in the installation. 1 The first heat of the Fan to Liyuan special power should be applied for as in the middle of the 3 11 heat dissipation when the appropriate tMMJ- to f ο between the fashion hot and heat scattered to the source of the heat and electricity should be given The stop-and-go system is followed, and after that, the French side’s heat is scattered. Fan fan wind 5, heat. ""^ The first is the scope of the system can be set up for the special installation, please apply for heat as in the case. In the 4-11, the French side of the heat scattered machine shadow. The electric power of the pool is 1 electric charge. The first is the system of the house. The special equipment is installed. Please apply for the storage. If ##第18页