CN1683991A - Cooling controller and method for liquid crystal projector - Google Patents
Cooling controller and method for liquid crystal projector Download PDFInfo
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- CN1683991A CN1683991A CN 200410021292 CN200410021292A CN1683991A CN 1683991 A CN1683991 A CN 1683991A CN 200410021292 CN200410021292 CN 200410021292 CN 200410021292 A CN200410021292 A CN 200410021292A CN 1683991 A CN1683991 A CN 1683991A
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Abstract
The cooling control method and device for liquid crystal projector is used to prevent temperature raise in image synthesizing system to cause damage of liquid crystal sheet and polarizing plate. The control device includes temperature detecting part; microcomputer to compare the temperature the detecting part detects and the three set temperature T1-T3 and to send control signal; control signal controlled fan, lamp controller to control the power consumption and brightness of the lamp based on the computer signal; and warning information sender to send warning information when the detected temperature is higher than T1. The present invention detects the temperature of the synthetic system periodically, decreases the power consumption of the lamp to reduce the heat and light on the synthetic system when the temperature is higher than T1, so as to raise the cooling performance and reliability.
Description
Technical field
The present invention is relevant liquid crystal projection apparatus, the synthetic system of picture that particularly is related to the liquid crystal projection apparatus dependability makes the heat with relevant temperature rising reason, and light changes, and to improve synthetic be the relevant liquid crystal projection apparatus cooling controller and the method for cooling problem.
Background technology
Generally, TV is made up of light source and optical system, and with the device of picture amplification to screen prjection, the liquid crystal projection apparatus of liquid crystal rear-projection appears being equipped with in TV along with occurring with cathode-ray tube (CRT) recently.Be to improve the brightness and the colourity of liquid crystal projection apparatus, done development effort and be greatly improved.Such as, for improving the high-energy light source of luminosity: promptly use metallic filament lamp, produced a large amount of heat in liquid crystal projection apparatus inside.
This heat rises the optics liquid crystal sheet of the synthetic system of television image and the temperature of Polarizer, not only causes the damage of parts, and loop feature is played ill effect.For preventing this problem,,, taked electric fan to force the mode of cooling for to reducing liquid crystal rear-projection iron chains sheet and Polarizer radiation heat promptly along with liquid crystal projection apparatus improves brightness in the past.Below, with reference to accompanying drawing just in the past the formation of liquid crystal projection apparatus cooling device do following detailed description:
Fig. 1 is that the liquid crystal projection apparatus cooling device was constructed simplified diagram in the past.Fig. 2 be the picture of Fig. 1 synthetic be the detailed structure planimetric map.Fig. 3 is a liquid crystal projection apparatus cooling control method process flow diagram in the past.Fig. 4 is that the liquid crystal projection apparatus temperature was set picture view in the past.
The liquid crystal projection apparatus cooling device as shown in Figure 1 in the past, by constituting with the lower part: picture is synthetic to be 10 and to detect above-mentioned picture synthetic be the temperature detecting part 20 of temperature, the temperature of the picture compositor 10 that will detect by temperature detecting part 20 and the reference temperature of setting are relatively judged, and send the microcomputer 30 of control signal, electric fan 40 by the driving of microcomputer 30 control signals, synthetic as picture is that temperature is than the reference temperature height of setting, by microcomputer 30 controls, the warning message efferent 50 of the information that gives a warning.
The synthetic system of above-mentioned picture as shown in Figure 2, usually three faces of tetragonal prism draw connect of all kinds, blue (B) the corresponding 3 pieces of liquid crystal sheets 12 of promptly red (R) green (G), the back side of these three pieces of liquid crystal sheets 12 has three pieces of Polarizers 13 supplying with above-mentioned primaries to constitute.Liquid crystal sheet 12 connect and acts on picture and show red, green, blue in 11 3 on prism and red, green, blue corresponding drawing, Polarizer 13 is positioned at the back side direction of liquid crystal iron chains plate, act on to the 3 primary colors display frames of liquid crystal sheet 12 usefulness, prism 11 will be from the synthetic effect of picture of each liquid crystal sheet 12 output.And liquid crystal projection apparatus was provided with electric fan (diagram is omitted) and air intake (diagram is omitted) is got rid of the heat that is added in liquid crystal sheet 12 and Polarizer 13 acceptance with the forced convertion mode below the synthetic system of above-mentioned portrait in the past.
Technology in the past is that when liquid crystal projection apparatus used, synthetic as picture was that temperature raises, and was the synthetic system of cooling picture, cooled off the synthetic system of picture with the rotational speed that changes electric fan.With reference to Fig. 3, this cooling control method is at first judged whether energized (s1) of TV, if TV power supply connect, to the temperature T of the synthetic system of picture.Detect (s2), judge that it is whether temperature T is than the 1st design temperature T1 height of setting (s3) that the picture that detects synthesizes.If judge the synthetic first design temperature T1 height that is temperature T result (s3) than setting of above-mentioned picture, increase electric fan speed so, output caution signal (s4).And liquid crystal projection apparatus stops power input in setting-up time, and electric fan work on (s5).Then judged whether to surpass the time of setting (s6), judged result (s6) has surpassed setting-up time, and TV can re-use, and the input service that stops power signal finishing (s7-s8).And the temperature T judged result (s3) of the synthetic system of portrait when being lower than the 1st design temperature T1 TV normally move (s9).
The liquid crystal projection apparatus temperature was set picture as shown in Figure 4 in the past, it is synthetic by the picture that is detected by temperature detecting part 20 to be 10 the temperature T first thermometer diagrammatic sketch, be that 10 temperature height is exported warning message for picture being shown synthetic, represent the 1st design temperature T1 reference temperature the 2nd thermometer diagrammatic sketch, and picture synthetic be that 10 temperature can cause that TV uses problem, and the reference temperature that TV power supply is cut off shows that the 3rd thermometer diagrammatic sketch of the second design temperature T2 constitutes.
By the said temperature test section, whether the temperature of representing according to the first thermometer diagrammatic sketch surpasses the temperature that the 2nd or the 3rd temperature is represented, microcomputer 30 is adjusted the speed of electric fan.
Such as: the temperature value height that the temperature value of representing at above-mentioned the 1st hygrogram is represented than the 2nd hygrogram, for making picture synthetic is the better of 10 coolings, and the speed of electric fan is improved, and the warning message that raises to user's output temperature (for example: screen-picture, electric bell sound, light emitting diode etc.).Then, confirm the user of warning, before TV cools off fully, stop the use of TV, in setting-up time, start electric fan 40, when the temperature of representing by the 1st thermometer diagrammatic sketch drops to the temperature that the 2nd thermometer diagrammatic sketch represents, restart TV.If the user can not judge and confirm warning message, no matter what state continues to use TV, the reference temperature of representing than the 3rd thermometer diagrammatic sketch by the temperature of the 1st thermometer diagrammatic sketch detection is high so, and TV stops automatically.
As mentioned above, there are the following problems for liquid crystal projection apparatus cooling controller and method in the past: the first, the temperature of the synthetic system of picture will improve the speed of electric fan than design temperature height, and could reduce picture synthetic is the rising of temperature.Have only the speed of adjusting electric fan that cooling effect is changed, picture is synthetic relatively is that temperature raises except closing television, does not have other corresponding schemes.The second, being temperature along with picture is synthetic can only closing television than under the high situation of design temperature, so the possibility of liquid crystal iron chains plate and polarisation bundle damaged increases.If the 3rd changes the liquid crystal iron chains plate and the Polarizer of damage, need very high expense.
Summary of the invention
The objective of the invention is the cooling controller and the method that provide a kind of liquid crystal projection apparatus for addressing the above problem, in the liquid crystal projection apparatus use, can accomplish to prevent in advance because of picture is synthetic is the rise damage of contingent liquid crystal sheet and Polarizer of temperature.
The purpose of invention is achieved through the following technical solutions: liquid crystal projection apparatus cooling controller of the present invention, comprise by liquid crystal sheet, and synthetic system of the picture that Polarizer and prism are formed and lamp, being provided with the detection picture synthetic is the temperature detecting part of temperature; Compare the microcomputer of output corresponding control signal with the 1st to the 3rd design temperature T3 of its setting at the temperature value that temperature detecting part detects; Electric fan by the driving of microcomputer control signal; According to the power consumption of microcomputer control signal control lamp and the lamp control part of brightness; When the synthetic temperature that is of picture is higher than the first design temperature T1 that sets, according to the warning message efferent of microcomputer control signal output warning message.
For finishing above-mentioned purpose liquid crystal projection apparatus cooling control method of the present invention be: synthetic to picture behind the liquid crystal projection apparatus access power supply is the stage that temperature detects.When the temperature that detects was higher than the 1st design temperature T1 that sets, it was the stage that temperature reduces that the driving cooling system makes picture synthetic.After cooling system drove, the temperature of the synthetic system of the picture of detection was lower than the 3rd design temperature T3 that sets, and enters the stage of the normal operation of liquid crystal projection apparatus so.The temperature of the synthetic system of the picture that detects during cooling system drives continues to rise, when higher than the 2nd design temperature T2 that sets, and the stage that liquid crystal projection apparatus is out of service.
The good effect of invention: 1, when the liquid crystal projection apparatus energized, can periodically measure the temperature of the synthetic system of picture, when temperature is higher than the 1st design temperature of setting, reduce the power consumption of lamp, negative heat and the light quantity that is added in the synthetic system of picture reduces, can prevent in advance that picture from synthesizing is that temperature rises, and improves cooling characteristics.2, owing to improve cooling characteristics, guarantee the reliability that liquid crystal projection apparatus receives.3, can control the reason that causes the damage of liquid crystal sheet and Polarizer in advance, therefore can prolong liquid crystal projection apparatus service time.
Description of drawings
Fig. 1 is a liquid crystal projection apparatus cooling controller brief configuration synoptic diagram in the past.
Fig. 2 be the picture of Fig. 1 synthetic be the detailed structure floor map.
Fig. 3 is a liquid crystal projection apparatus cooling control method schematic flow sheet in the past.
Fig. 4 is that the liquid crystal projection apparatus temperature was set the picture presentation graphs in the past.
Fig. 5 is a liquid crystal projection apparatus cooling controller structural representation of the present invention.
Fig. 6 is that liquid crystal projection apparatus of the present invention is represented the cooling controller schematic flow sheet.
Fig. 7 is the presentation graphs that liquid crystal projection apparatus of the present invention is represented temperature setting picture.
The symbol description of drawing major part:
Picture is synthetic to be 100, temperature detecting part 200, microcomputer 300, electric fan 400, lamp control part 500, lamp 600, warning message efferent 700.
Embodiment
Followingly the present invention is done following detailed description with reference to accompanying drawing:
Liquid crystal projection apparatus cooling controller of the present invention constitutes as shown in Figure 5: be provided with liquid crystal sheet (diagram is omitted), the picture that Polarizer (diagram is omitted) and prism (diagram is omitted) constitute is synthetic to be 100, lamp 600, detecting picture synthetic is the temperature detecting part 200 of 100 temperature, send the microcomputer 300 of suitable control signal according to the temperature of temperature detecting part 200 detections, electric fan 400 by the driving of microcomputer 300 control signals, according to the brightness of microcomputer 300 control signals control lamp 600 and the lamp control part 500 of power consumption, when picture is synthetic is that 100 temperature is than the first design temperature T1 height of setting, by the control signal control of microcomputer 300, the warning message efferent 700 of caution signal takes place.
Above-mentioned warning message efferent 700 comprise the output video of the sound that can give a warning or light-emitting diode spot one of them.
The action specification of liquid crystal projection apparatus cooling controller of the present invention is as follows:
Connect temperature detecting part 200 power supplys, detecting picture synthetic is 100 temperature, by microcomputer 300 temperature that temperature detecting part 200 detects is compared with the 1st to the 3rd design temperature T1-T3 of its setting.Above-mentioned the 1st design temperature T1 is a reference temperature from the hazard level of liquid crystal projection apparatus to the user that represent.The 2nd design temperature T2 is the reference temperature that liquid crystal projection apparatus can cut off the power supply when overheated automatically, and the 3rd design temperature is the cooling system reference temperature that TV can normally move when driving.
The temperature that temperature detecting part 200 detects is higher than the first design temperature T1 of setting, and microcomputer sends control signal to lamp control part 500, reduces the power consumption of lamp 600 and the brightness of lamp, and temperature detecting part (200) to continue to detect picture synthetic be 100 temperature.
At this moment, detected picture is synthetic be 100 temperature below the 3rd design temperature T3 that sets, then lamp control part 500 enters the power consumption and the brightness that improve lamp 600 increases the state of a control running.
And microcomputer 300 is when detecting cooling systems and driving, picture is synthetic to be that 100 temperature is than the 2nd design temperature T2 height of setting, for preventing liquid crystal sheet (diagram is omitted) and Polarizer (diagram is omitted) damage, to lamp control part 500 output control signals, the lamp 600 out-of-work TVs that make are simultaneously cut off the power supply.
Here, the 1st design temperature T1 is the reference temperature that picture synthesizes the output warning message that is 100 temperature height.The second design temperature T2 be picture synthetic be 100 temperature when high than the 1st design temperature, cooling system drives immediately, along with the rising of temperature, the reference temperature that when causing the problem of TV use liquid crystal projection apparatus is cut off the electricity supply.The 3rd design temperature T3 be picture synthetic be 100 temperature than the high startup of the 1st design temperature T1 cooling system, picture synthesizes when being 100 temperature decline, makes TV be transformed into the reference temperature of normal condition.
As mentioned above, liquid crystal projection apparatus cooling control method of the present invention describes with reference to Fig. 6:
At first judge whether energized (s11) of TV, then, judged result (s11), the TV energized is just measured the temperature T (s12) of the synthetic system of picture, and the temperature T of the synthetic system of the picture of measuring the 1st design temperature T1 height (s13) that judges whether and set, follow judged result, the picture of measuring is synthetic to be that temperature T is when higher than the 1st design temperature T1 that sets, increase the speed of electric fan and export warning message (s14), moreover, drive power consumption and brightness that lamp control device reduces lamp, detect the temperature (s15) of the synthetic system of picture.Reducing the power consumption of lamp and the stage of brightness, is the process that changes cooling effect.Synthetic to picture in the process of power consumption that reduces lamp and brightness is that temperature is done periodically detection.Then, judge whether the temperature of above-mentioned reduction is in the 3rd design temperature (s16) below 73 of its setting.At judgement stage (s16), when the temperature of detection was lower than the 3rd design temperature T3 that sets, the power consumption and the brightness that increase lamp made TV run well (s17) termination (s18) of ceasing and desisting order of input.
Above-mentioned judged result (s13) shows that it is that temperature T is lower than the 1st design temperature of setting that the picture that detects synthesizes, and in the time of the TV driven, continues to detect the temperature (s19) that picture synthesizes system.
Judged result (s16) shows the temperature that detects than the 3rd design temperature T3 height on the one hand, is judged as to continue to heat up, and judges whether again than the 2nd design temperature T2 height (s20).The temperature that detects is than the 2nd design temperature T2 height of setting, and makes TV cut off the power supply automatically (s21).
Liquid crystal projection apparatus of the present invention is represented temperature setting picture as shown in Figure 7, by temperature detecting part 200, the present picture of expression that detects is synthetic to be 100 temperature T the 1st thermometer diagrammatic sketch, and the expression picture synthetic be i.e. the 1st design temperature T1 the 2nd thermometer diagrammatic sketch of reference temperature of 100 temperature height and the information that gives a warning, picture is synthetic to be 100 temperature, the reference temperature that liquid crystal projection apparatus is cut off the electricity supply is represented the 3rd thermometer diagrammatic sketch of the 2nd design temperature T2, picture is synthetic to be 100 temperature when high than the 1st design temperature T1, drives the 4th thermometer diagrammatic sketch that reference temperature that cooling system judgement TV can recover normal condition is promptly represented the 3rd design temperature.
As mentioned above, liquid crystal rear-projection cooling control method of the present invention: liquid crystal projection apparatus is connected with the mains, and synthetic to above-mentioned picture is that 100 temperature cycle is measured the temperature T that detects when higher than the 1st design temperature T1 that sets.
Microcomputer makes the power consumption of lamp 600 and brightness reduce the economize on electricity that realizes lamp according to this situation to lamp control part 500 output control signals.
Descend according to the power consumption of this lamp and brightness, the heat and the light quantity that influences the synthetic system of picture all reduce, and projecting picture synthetic is that 100 light and heat dwindle, and the synthetic system of picture just can cool off so, temperature decline.TV does not have any problem and normally uses.
And be 100 to realize cooling along with picture is synthetic, picture is synthetic to be that 100 temperature descends, and when dropping to below the 3rd design temperature T3, microcomputer 300 sends the signal that economize on electricity stops to lamp control part 500, the power consumption of lamp and brightness increase 120w-150w, recover normal condition.
When cooling system drove, because of unusual (air port is stopped up, and electric fan is unusual) of liquid crystal projection apparatus, picture is synthetic to be that 100 temperature continues to rise and rises than the 2nd design temperature of setting, and then liquid crystal sheet and Polarizer are impaired, and reliability goes wrong.For preventing this problem, microcomputer 300 sends control signal to lamp control part 500, and lamp 600 is closed fully, and TV quits work.
Claims (6)
1, a kind of liquid crystal projection apparatus cooling controller comprises by liquid crystal sheet, and synthetic system of the picture that Polarizer and prism are formed and lamp is characterized in that: being provided with the detection picture synthetic is the temperature detecting part of temperature; Compare the microcomputer of output corresponding control signal with the 1st to the 3rd design temperature T3 of its setting at the temperature value that temperature detecting part detects; Electric fan by the driving of microcomputer control signal; According to the power consumption of microcomputer control signal control lamp and the lamp control part of brightness; When the synthetic temperature that is of picture is higher than the first design temperature T1 that sets, according to the warning message efferent of microcomputer control signal output warning message.
2, liquid crystal projection apparatus cooling controller according to claim 1 is characterized in that: the lamp control part is the control device that the power consumption and the brightness of lamp can be reduced or increases according to microcomputer.
3, a kind of liquid crystal projection apparatus cooling control method, it is characterized in that: synthetic to picture behind the liquid crystal projection apparatus access power supply is the stage that temperature detects, when the temperature that detects is higher than the 1st design temperature T1 that sets, it is the stage that temperature reduces that the driving cooling system makes picture synthetic, after cooling system drives, the temperature of the synthetic system of the picture that detects is lower than the 3rd design temperature T3 that sets, enter the stage of liquid crystal projection apparatus driven so, the temperature of the synthetic system of the picture that detects during cooling system drives continues to rise, when higher than the 2nd design temperature T2 that sets, the stage that liquid crystal projection apparatus is out of service.
4, liquid crystal projection apparatus cooling control method according to claim 3 is characterized in that: when cooling system drives, be the stage of temperature detecting picture synthetic, reduce the power consumption and the brightness of lamp, reducing picture synthetic is the stage of temperature.
5, liquid crystal projection apparatus cooling control method according to claim 3 is characterized in that: the stage of liquid crystal projection apparatus driven is power consumption and the luminance recovery normal condition that improves lamp.
6, liquid crystal projection apparatus cooling control method according to claim 3 is characterized in that: the 1st to the 3rd design temperature is to satisfy the 3rd design temperature＜the 1st design temperature＜the 2nd design temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021292 CN1683991A (en) | 2004-04-13 | 2004-04-13 | Cooling controller and method for liquid crystal projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021292 CN1683991A (en) | 2004-04-13 | 2004-04-13 | Cooling controller and method for liquid crystal projector |
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| Publication Number | Publication Date |
|---|---|
| CN1683991A true CN1683991A (en) | 2005-10-19 |
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| CN 200410021292 Pending CN1683991A (en) | 2004-04-13 | 2004-04-13 | Cooling controller and method for liquid crystal projector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408712B (en) * | 2007-10-11 | 2010-09-29 | 鸿富锦精密工业（深圳）有限公司 | Projector prompt system |
| 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 |
| CN104298056A (en) * | 2014-10-15 | 2015-01-21 | 深圳雅图数字视频技术有限公司 | Polarizing plate assembly and projector with same |
-
2004
- 2004-04-13 CN CN 200410021292 patent/CN1683991A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101408712B (en) * | 2007-10-11 | 2010-09-29 | 鸿富锦精密工业（深圳）有限公司 | Projector prompt system |
| 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 |
| CN104298056A (en) * | 2014-10-15 | 2015-01-21 | 深圳雅图数字视频技术有限公司 | Polarizing plate assembly and projector with same |
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