CN1941871A - Projection image display equipment and its controlling method - Google Patents
Projection image display equipment and its controlling method Download PDFInfo
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- CN1941871A CN1941871A CN 200510047301 CN200510047301A CN1941871A CN 1941871 A CN1941871 A CN 1941871A CN 200510047301 CN200510047301 CN 200510047301 CN 200510047301 A CN200510047301 A CN 200510047301A CN 1941871 A CN1941871 A CN 1941871A
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- lamp source
- drive division
- temperature
- cooling fan
- source drive
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Abstract
The apparatus comprises: a user input unit for inputting instruction from user; a lamplight source driving unit for driving the lamplight source; a controller for outputting relevant instruction according to the instruction from user, detecting the temperature of lamplight source and outputting the relevant control signals; and a cooling fan power for providing power for cooling fan. By the invention, the speed of cooling fan can vary along with the variation of temperature so as to reduce power consumption.
Description
Technical field
The present invention relates to a kind of image display, particularly relate to a kind ofly in the projection type image display apparatus of high-voltage mercury discharging lamp light source, improve the projection type image display apparatus and the control method thereof of cooling effectiveness by the state of temperature of real-time detection lamp source drive division as light source.
Background technology
Usually, utilize the projection type image display apparatus of lamp source as liquid crystal display or Digital Light Processor television set, LCD projector etc. as light source, most of lamp source of using metal halide (Metal-Halide) system, its reason is because lamp source, its life-span and the outstanding cause of spectral characteristic of metal-halide system.
And this lamp source is the basic heater of optical engine system of projection type image display apparatus as light source, in order to keep the lamp source life-span and to guarantee that its reliability adopts cooling system inevitably.
Below, with reference to accompanying drawing, the conventional art projection type image display apparatus is described.
Fig. 1 is that the control device of conventional art projection type image display apparatus constitutes block diagram.
The control device of conventional art projection type image display apparatus as shown in Figure 1, is to be made of following part: for lamp source 13 is lighted at a certain temperature, adopt the energized program work time, the control part 11 that each one of system is carried out master control; Light lamp source 13 according to the control of control part 11, and detect when whether lighting, to the lamp source drive division (Ballast is a ballast) 12 of control part 11 output lamp source detection signals; According to the control signal of control part 11, provide the power supply unit 14 of driving power with power suppling part 15 to lamp source drive division 12 and cooling fan; When connection or powered-down, controlled 11 control, and at energized program work time durations, drive the cooling fan 16 of lamp source, simultaneously during keeping the power connection state, the cooling fan that driving power is provided for the cooling fan 16 that continues to drive this lamp source is with power suppling part 15; Drive the lamp source cooling fan 16 that produces for cool down lamp light source 13 needed wind by cooling fan with power suppling part 15.
In the control device of conventional art projection type image display apparatus as constituted above, lamp source 13 is as the lamp source that is applied to metal-halide system such as liquid crystal displaying projecting television, LCD projector, if energized, then, provide 25KV from lamp source drive division 12 in order to light lamp source 13
P-PThe high voltage of degree.
If lamp source 13 operate as normal then produce high heat, therefore, must use the cooling device as lamp source cooling fan 16 in order to cool off this high heat.
But, rely on the cooling system of this lamp source cooling fan 16 must produce noise, therefore reduce the quality of product greatly, this traditional lamp source cooling system is in order to satisfy lamp source temperature treatment pointer, the temperature that is sparking electrode satisfies temperature independent being set at of the rotating speed of lamp source cooling fan 16 (RPM) from 40 ℃ in the scope below 350 ℃ in the scope that machine is set.
This is because the physical condition of most of user when using image display, promptly causes unnecessary cooling under 25 ℃ of the normal temperature, therefore reduces cooling effectiveness, has increased noise under normal temperature condition.
Table 1
| Environment temperature | 40℃ | 25℃ |
| The sparking electrode temperature | 340℃ | 325℃ |
| Rotation speed of the fan | 2000 rev/mins | 2000 rev/mins |
| Noise | 26 decibels | 26 decibels |
As shown in table 1, though along with environment temperature reduces 15 ℃, lamp source heating position temperature, the temperature that is sparking electrode also reduces 15 ℃ simultaneously, but cooling fan and environment temperature are irrespectively carried out work with fixing rotating speed, when therefore reducing cooling effectiveness, produce unnecessary noise, thereby become the key factor that conventional art reduces product quality.
Summary of the invention
The present invention invents for the problem that solves above-mentioned existence, its objective is the state of temperature that detects the lamp source drive division in real time.
Another object of the present invention is the actuating speed that can change cooling fan when inferring the temperature of lamp source according to the output state of lamp source.
In order to achieve the above object, projection type image display apparatus of the present invention, the projection type image display apparatus that promptly has lamp source, cooling fan is to be made of following part: the user's input part that is provided with for the order of importing customer requirements; The lamp source drive division that is provided with in order to drive lamp source; According to the order of the customer requirements by user's input part input, export corresponding control command, and when detecting the variations in temperature of lamp source drive division, the control part that is provided with for the output corresponding control signal with communicating by letter of lamp source drive division; According to the control signal of control part, the cooling fan power suppling part that is provided with for the power supply of supplying with cooling fan.
Described lamp source drive division and control part are carried out universal asynchronous (UART) serial communication.
The lamp source drive division changes according to environment temperature, and impedance (Impedance) value relevant with negative temperature coefficient (NTC) element also changes.
The cooling fan power suppling part is according to the control signal of control part, the inversely proportional changing value of impedance of output and lamp source drive division, and provide power supply for driving cooling fan.
A kind of control method of projection type image display apparatus promptly has the control method of the projection type image display apparatus of lamp source, lamp source drive division and cooling fan, is made up of following step:
If the user imports the order of energized, then by with the communicating by letter of lamp source drive division, the variations in temperature of lamp source drive division is detected step;
Temperature change value according to detecting changes step to speed of cooling fan.
Described variations in temperature to the lamp source drive division detects step and is made up of following step:
If the brightness of user's manual adjustment lamp source, then the variations in temperature to lamp source detects step; Change according to environment temperature, the temperature characterisitic of the temperature detection element that constitutes the lamp source drive division is changed detect step.
The present invention has following effect:
The 1st, detect the variations in temperature of lamp source variable power, lamp source variations in temperature or environment temperature variation, lamp source drive division etc. by communication between lamp source drive division and the control part, and make speed of cooling fan (RPM) follow variation of temperature, cooling rate that therefore can compensates.
The 2nd, the compensation along with the cooling rate of variations in temperature can reduce overall noise.
The 3rd, under the low service condition of temperature, therefore the electricity consumption that unnecessary cooling causes when can advance preventing using can reduce electricity consumption.
Description of drawings
Fig. 1 is the formation block diagram of conventional art projection type image display apparatus.
Fig. 2 is the formation block diagram of projection type image display apparatus of the present invention.
Fig. 3 is the block diagram of the communication process between lamp source drive division shown in Fig. 2 and control part.
Fig. 4 is the control method flow chart of projection type image display apparatus of the present invention.
Among the figure:
100: user's input part 200: control part
300: lamp source 400: the lamp source drive division
500: the cooling fan power suppling part
600: cooling fan
Embodiment
Below, with reference to accompanying drawing, projection type image display apparatus of the present invention and control method thereof are further specified.
Fig. 2 is the formation block diagram of projection type image display apparatus of the present invention; Fig. 3 is the block diagram of the communication process between lamp source drive division shown in Fig. 2 and control part; Fig. 4 is the control method flow chart of projection type image display apparatus of the present invention.
Projection type image display apparatus of the present invention is to be made of following part: the user's input part 100 that is provided with for the order of importing customer requirements as shown in Figure 2; Lamp source 300; The lamp source drive division 400 that is provided with in order to drive lamp source 300; Cooling fan 600; The cooling fan that is provided with in order to provide power supply power suppling part 500 to cooling fan 600; By and lamp source drive division 400 between data communication come the state of temperature of real-time detection lamp source drive division 400, and with power suppling part 500 output control signals the time, it is controlled the control part 200 that is provided with to cooling fan for the rotating speed (RPM) that makes cooling fan 600 is variable according to the situation of detected temperatures state.
Job description to projection type image display apparatus of the present invention as constituted above is as follows:
At first, can regulate the brightness of lamp source 300 by user's input part 100 users, when lamp source 300 brightness of importing by user's input part 100 are regulated, carry out data communication in real time between lamp source drive division 400 and the control part 200, thereby change the rotating speed (RPM) that changes cooling fan 600 according to environment temperature.
Communication process between lamp source drive division 400 and the control part 200, as shown in Figure 3, if from control part 200 output commands, then receive order by photoelectrical coupler 210, and in order to make the 410 pairs of reception orders of lamp source control part in the lamp source drive division 400 can discern and it is changed; For detected value by lamp source control part 410 output etc. can be discerned, being input to control part 200 after by photoelectrical coupler 210 it being changed in control part 200.
That is, has the data communication architecture that can carry out universal asynchronous (UART) serial communication between lamp source drive division 400 and the control part 200.Therefore this communication process can be divided into the processing procedure of user's input part 100 input commands and the processing procedure by real time communication process between lamp source drive division 400 and the control part 200.
Change lamp source 300 brightness by user's input part 100, proportional from the lamp source power and the caloric value of 400 outputs of lamp source drive division, at this moment, the noise specification of driven cooling fan 600, be output as under the maximal condition in lamp source 300, be set at the rotating speed (RPM) that satisfies lamp source 300 maximum heating temps, decide the noise specification by rotating speed (RPM) value.
And, by can know the proportional variation of temperature of lamp source drive division 400 from the lamp source power of lamp source drive division 400 outputs.At this moment, it is the variation that is worth by the impedance (Impedance) relevant with negative temperature coefficient (Negative Temperature Coefficient is hereinafter to be referred as NTC) element that lamp source drive division 400 detected temperatures change, and detects variation of temperature.
The temperature province of lamp source drive division 400 can be divided into (out of spec) outside critical (the Critical)/specification of O.K//close (shut down) 4 kinds of zones.Lamp source drive division 400 and control part 200 can be by the states of communication check temperature province.
Therefore, projection type image display apparatus of the present invention detects the variations in temperature of lamp source drive division 400 by the communication between lamp source drive division 400 and the control part 200, and utilization impedance (Impedance) relevant with negative temperature coefficient (NTC) and the inversely proportional characteristic of temperature, can change the rotating speed (RPM) of cooling fan 600.
Promptly, if the environment temperature increase causes the impedance (Impedance) relevant with negative temperature coefficient (NTC) in the lamp source drive division 400 and reduces, then increase with the voltage that power suppling part 500 offers cooling fan 600, so the rotating speed of cooling fan 600 (RPM) also increases by cooling fan.
In contrast, if environment temperature reduces the impedance (Impedance) relevant with negative temperature coefficient (NTC) that causes in the lamp source drive division 400 and increases, then reduce with the voltage that power suppling part 500 offers cooling fan 600, so the rotating speed of cooling fan 600 (RPM) also reduces by cooling fan.
Because environment temperature changes the impedance (Impedance) relevant with negative temperature coefficient (NTC) element that causes in the lamp source drive division 400 and changes, and therefore can change the input voltage of cooling fan 600, thereby can change rotating speed (RPM).
Above-mentioned situation, when changing the brightness of lamp source 300 by user's input part 100, the user also works, if the brightness of lamp source 300 increases, then the temperature owing to lamp source drive division 400 also increases, so temperature detection element of lamp source drive division 400, the voltage of positive voltage circuit increased when promptly relevant with negative temperature coefficient (NTC) impedance (Impedance) reduced, thereby the rotating speed (RPM) of cooling fan 600 increases when the voltage of supplying with cooling fan 600 increases.
As above-mentioned analysis, the variation of the power by lamp source 300 causes the variations in temperature of lamp source 300 and changes the variations in temperature etc. of the lamp source drive division 400 that causes by environment temperature, because the variation of the temperature characterisitic of temperature detection element, therefore the rotating speed (RPM) of cooling fan 600 will change along with the variation of the temperature characterisitic of temperature detection element, thereby can compensate the cooling rate of variations in temperature.
Control method to as the projection type image display apparatus of the present invention of above-mentioned formation describes as follows with reference to Fig. 4: at first, if the order of input energized then detects the variations in temperature (S101 ∽ S102) of lamp source.
According to detected temperature change value, compare the back with fiducial value and change speed of cooling fan (RPM) (S103 ∽ S104).
Then, if the user imports the powered-down order, then finish (S105).
Claims (6)
1, a kind of projection type image display apparatus, it has lamp source, cooling fan, it is characterized in that it being to be made of following part:
The user's input part that is provided with for the order of importing customer requirements;
The lamp source drive division that is provided with in order to drive lamp source;
According to the order of the customer requirements by user's input part input, export corresponding control command, and when detecting the variations in temperature of lamp source drive division, the control part that is provided with for the output corresponding control signal with communicating by letter of lamp source drive division;
According to the control signal of control part, the cooling fan power suppling part that is provided with for the power supply of supplying with cooling fan.
2, projection type image display apparatus according to claim 1 is characterized in that described lamp source drive division and control part carry out universal asynchronous serial communication.
3, projection type image display apparatus according to claim 1 is characterized in that described lamp source drive division changes according to environment temperature, and the resistance value relevant with the negative temperature coefficient element also changes.
4, projection type image display apparatus according to claim 1, it is characterized in that the control signal of described cooling fan power suppling part according to control part, the output and the inversely proportional changing value of impedance of lamp source drive division, and provide power supply for driving cooling fan.
5, a kind of control method of projection type image display apparatus promptly has the control method of the projection type image display apparatus of lamp source, lamp source drive division and cooling fan, it is characterized in that being made up of following step:
If the user imports the order of energized, then by with the communicating by letter of lamp source drive division, the variations in temperature of lamp source drive division is detected step;
Temperature change value according to detecting changes step to speed of cooling fan.
6, the control method of projection type image display apparatus according to claim 5 is characterized in that described variations in temperature to the lamp source drive division detects step and is made up of following step:
If the brightness of user's manual adjustment lamp source, then the variations in temperature to lamp source detects step; Change according to environment temperature, the temperature characterisitic of the temperature detection element that constitutes the lamp source drive division is changed detect step.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510047301 CN1941871A (en) | 2005-09-29 | 2005-09-29 | Projection image display equipment and its controlling method |
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|---|---|---|---|
| CN 200510047301 CN1941871A (en) | 2005-09-29 | 2005-09-29 | Projection image display equipment and its controlling method |
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| CN1941871A true CN1941871A (en) | 2007-04-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373315B (en) * | 2007-08-21 | 2010-06-09 | 佳世达科技股份有限公司 | Projector and method for cooling light source module discharging part |
| CN101435977B (en) * | 2007-11-12 | 2010-11-10 | 鸿富锦精密工业（深圳）有限公司 | Projector and overheating protection method thereof |
| CN102033401A (en) * | 2010-10-27 | 2011-04-27 | 许崇良 | Projection imaging method and system based on red, green and blue LED light sources |
| WO2017201990A1 (en) * | 2016-05-24 | 2017-11-30 | 中兴通讯股份有限公司 | Projector safe working method and device |
| CN112558393A (en) * | 2021-01-11 | 2021-03-26 | 南京捷乾干电子商务有限公司 | Projection device with functions of temperature control, speed regulation and circuit breaking and follow current heat dissipation |
-
2005
- 2005-09-29 CN CN 200510047301 patent/CN1941871A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373315B (en) * | 2007-08-21 | 2010-06-09 | 佳世达科技股份有限公司 | Projector and method for cooling light source module discharging part |
| CN101435977B (en) * | 2007-11-12 | 2010-11-10 | 鸿富锦精密工业（深圳）有限公司 | Projector and overheating protection method thereof |
| CN102033401A (en) * | 2010-10-27 | 2011-04-27 | 许崇良 | Projection imaging method and system based on red, green and blue LED light sources |
| WO2017201990A1 (en) * | 2016-05-24 | 2017-11-30 | 中兴通讯股份有限公司 | Projector safe working method and device |
| CN107422591A (en) * | 2016-05-24 | 2017-12-01 | 中兴通讯股份有限公司 | A kind of projecting apparatus trouble free service method and device |
| CN107422591B (en) * | 2016-05-24 | 2020-02-07 | 中兴通讯股份有限公司 | Projector safe working method and device |
| CN112558393A (en) * | 2021-01-11 | 2021-03-26 | 南京捷乾干电子商务有限公司 | Projection device with functions of temperature control, speed regulation and circuit breaking and follow current heat dissipation |
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