CN100535820C - Method for controlling temp of display device and its device - Google Patents
Method for controlling temp of display device and its device Download PDFInfo
- Publication number
- CN100535820C CN100535820C CNB2005100544637A CN200510054463A CN100535820C CN 100535820 C CN100535820 C CN 100535820C CN B2005100544637 A CNB2005100544637 A CN B2005100544637A CN 200510054463 A CN200510054463 A CN 200510054463A CN 100535820 C CN100535820 C CN 100535820C
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- temperature
- voltage
- display device
- control equipment
- grenade instrumentation
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Abstract
A method for controlling temperature in display device includes obtaining service time of light source in display device and deriving out a temperature compensation value according to service time, obtaining temperature of projection unit in display device for providing a voltage - temperature comparison table, obtaining the first temperature by operating said temperature compensation and temperature of projection unit, picking a voltage up by said voltage - temperature comparison table as per the first temperature and outputting picked up voltage to a fan.
Description
Technical field
The present invention is temperature-controlled process and its device in a kind of display device, particularly temperature-controlled process and its device of decaying at bulb brightness in the display device.
Background technology
In projector or back projection television, required light source all is that the bulb that relies in projector or the back projection television provides, by a grenade instrumentation, as digital microscope equipment (Digital MicromirrorDevice, DMD), image is projected display screen.And utilize a temperature-sensitive sticker on grenade instrumentation about the radiating control in projector or the back projection television, respond to the temperature of grenade instrumentation, and then radiating control is done by projector or back projection TV according to the temperature of grenade instrumentation.
Because to screen, its variation of temperature then is along with the brightness of bulb is different and different to grenade instrumentation in order to light source projects that bulb is produced, when the brightness of bulb is big more, the temperature that senses on the grenade instrumentation is also just high more.Though the brightness of bulb can reduce along with the increase of service time, the whole power of accepting of bulb but is fixing, so the whole heat energy that receives is fixed in projector or the back projection TV.But because the relation of brightness decay, make that the temperature that senses on the grenade instrumentation is lower, thereby can't make best radiating control, and other element projector in is too high and damage with regard to possible Yin Wendu at practical situation.Existing settling mode about the problems referred to above all is when radiating control, design higher tolerance, just must forced shutdown when for example projector is limited in temperature and reaches 65 ℃, but consider because the problem of bulb brightness decay, may projector on the actual design in the time of 60 ℃ with regard to forced shutdown.Though can utilize aforesaid way to avoid the temperature and the actual problem of drop to some extent that senses because of the bulb brightness decay, but still can't be fully at the corresponding temperature control of bulb brightness decay do.
Summary of the invention
Purpose of the present invention is for providing the temperature-controlled process in a kind of display device, particularly a kind of temperature-controlled process at the bulb brightness decay.
Another object of the present invention is for providing the temperature control equipment in a kind of display device, particularly a kind of temperature control equipment at the bulb brightness decay.
The invention provides temperature controlled method in a kind of display device, this display device comprises a light supply apparatus and a grenade instrumentation, comprises the following steps: to obtain the service time of this light supply apparatus, and according to trying to achieve a temperature compensation value service time of this light supply apparatus; Obtain the temperature of this grenade instrumentation; The one voltage temperature table of comparisons is provided; And obtain one first temperature after the temperature computing with this temperature compensation value and this grenade instrumentation, and capture a voltage according to this first temperature by this voltage temperature table of comparisons, export this voltage to one fan.
The present invention more provides a kind of display device with temperature control equipment, comprises a light supply apparatus, a timer, a grenade instrumentation, a temperature-sensitive sticker, a fan, a voltage temperature table of comparisons and a controller.This light supply apparatus is in order to provide this display device required light source.This timer is in order to calculate the service time of this light supply apparatus.This grenade instrumentation is in order to reflect the light source of this light supply apparatus.This temperature-sensitive sticker is in order to the temperature of this grenade instrumentation of sensing.This voltage temperature table of comparisons.This controller is according to trying to achieve a temperature compensation value service time of this light supply apparatus, obtain one first temperature after the temperature computing according to this temperature compensation value and this grenade instrumentation again, capture a magnitude of voltage by this voltage temperature table of comparisons, output is to voltage that should magnitude of voltage.This fan is accepted the voltage that this controller is exported, and display device is dispelled the heat.
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 is that three kinds of different bulbs are accepted the measured brightness time contrast figure of constant power;
Fig. 2 is the functional schematic of one embodiment of the invention;
Fig. 3 is the service time of the lamp box 21 among Fig. 2 and the table of comparisons of temperature compensation value;
Fig. 4 is an embodiment of the temperature voltage table of comparisons 25 among Fig. 2;
Fig. 5 is a rotation speed of the fan and temperature contrast figure.
Embodiment
Fig. 1 is that three kinds of different bulbs are accepted the measured brightness time contrast figure of constant power.In Fig. 1, under the situation that the power that bulb is accepted is fixed, the brightness that bulb is recorded at the beginning is made as 1, measured the brightness of bulb then once more every 250 hours, ask for a fiducial value with bulb brightness ratio at the beginning, again it is indicated on Fig. 1, is depicted as the brightness time contrast figure of bulb.Can find that from Fig. 1 though because the difference of bulb and the speed of brightness decay is different, can find that bulb accepting under the service condition of constant power, brightness is along with increase and the result of reduction service time.
Fig. 2 is the functional schematic according to one embodiment of the invention.Lamp box (Lamp Box) 21 is for providing projector 20 required light source, see through grenade instrumentation 22 image is projected display screen, in the present embodiment, the better embodiment of grenade instrumentation 22 be a digital micro-analysis device (Digital MicromirrorDevice, DMD).Electric stabilizer (ballast) in order to electric energy that constant power is provided to lamp box 21.Timer 26 is in order to calculating the service time of lamp box 21, and is sent in the controller 24, and controller calculates a temperature compensation value 24 service times according to lamp box 21.In the calculating of temperature compensation value, can replace with a lookup table mode, with Fig. 3 is example, and Fig. 3 is according to the service time of the lamp box among Fig. 2 21 and the table of comparisons of temperature compensation value, by learning lamp box about temperature compensation value that needs 0.5 ℃ per 250 hours of 21 service times in the table of comparisons.This table per 250 hours with service time was that spacing only is a present embodiment explanation usefulness, in fact can make more detailed service time of the temperature compensation value table of comparisons according to user demand.
The light source that grenade instrumentation 22 is provided because of need reflection lamp box 21, temperature is higher, therefore needs a heat radiator (not drawing on the figure) auxiliary heat dissipation, and heat radiator is provided with a temperature-sensitive sticker 23, connect the temperature of grenade instrumentation 22, and pass temperature value back controller 24 in order to sensing grenade instrumentation 22.Controller 24 is receiving after temperature-sensitive sticker 23 senses the temperature of grenade instrumentation 22, after calculating with the temperature compensation value of trying to achieve for 21 service times according to lamp box, tries to achieve a finishing temperature.In the present embodiment, controller 24 in the hope of this finishing temperature, is inquired about a temperature voltage table of comparisons 25 according to this finishing temperature with the temperature addition of temperature compensation value and grenade instrumentation 22 again, tries to achieve a corresponding magnitude of voltage, and exports this voltage.
Fig. 4 is an embodiment of the temperature voltage table of comparisons 25 among Fig. 2.In Fig. 4, when finishing temperature was lower than 35 ℃, controller 24 outputs one voltage 5V when finishing temperature is higher than 42, then exported maximum voltage 12V.In this temperature voltage table of comparisons, be lower than 35 ℃ when being higher than 42 ℃, all be as measuring spacing with 1 ℃, and in the time of 35 ℃～42 ℃ for asking more accurate radiating control, then be with less than 1 ℃ 0.5 ℃ as measuring spacing, 24 of controllers capture corresponding voltage value according to finishing temperature.Yet this only is an embodiment, and any present technique person of knowing be when can planning different temperature intervals according to demand, non-ly exceeds with present embodiment.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do some change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (7)
1. display device with temperature control equipment comprises:
One light supply apparatus is in order to provide this display device required light source;
One timer is in order to calculate the service time of this light supply apparatus;
One grenade instrumentation is in order to reflect the light source of this light supply apparatus;
One temperature-sensitive sticker is in order to the temperature of this grenade instrumentation of sensing;
One controller according to trying to achieve a temperature compensation value service time of this light supply apparatus, after the temperature computing according to this temperature compensation value and this grenade instrumentation, calculates a magnitude of voltage again, and output is to voltage that should magnitude of voltage; And
One fan is accepted the voltage that this controller is exported.
2. the display device with temperature control equipment as claimed in claim 1 wherein also comprises a voltage temperature table of comparisons.
3. the display device with temperature control equipment as claimed in claim 2, wherein one first temperature of this controller after, this voltage temperature table of comparisons acquisition corresponding voltage value certainly according to the temperature computing of this temperature compensation value and this grenade instrumentation.
4. the display device with temperature control equipment as claimed in claim 1, wherein this grenade instrumentation is a digital micro-analysis device.
5. the display device with temperature control equipment as claimed in claim 2, wherein the voltage in this voltage temperature table of comparisons has a upper voltage limit value and a lower voltage limit value, and the revolution of this fan is proportional to this voltage.
6. the display device with temperature control equipment as claimed in claim 5, wherein this lower voltage limit value lowest starting voltage that is this fan.
7. the display device with temperature control equipment as claimed in claim 5, wherein this upper voltage limit value maximum load voltage that is this fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100544637A CN100535820C (en) | 2005-03-10 | 2005-03-10 | Method for controlling temp of display device and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100544637A CN100535820C (en) | 2005-03-10 | 2005-03-10 | Method for controlling temp of display device and its device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1831695A CN1831695A (en) | 2006-09-13 |
| CN100535820C true CN100535820C (en) | 2009-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100544637A Expired - Fee Related CN100535820C (en) | 2005-03-10 | 2005-03-10 | Method for controlling temp of display device and its device |
Country Status (1)
| Country | Link |
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| CN (1) | CN100535820C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072766B (en) * | 2010-12-14 | 2012-12-26 | 广东威创视讯科技股份有限公司 | Device and method for detecting brightness decay degree of bulb of projector |
| CN102736645B (en) * | 2012-06-28 | 2014-12-10 | 北京雪迪龙科技股份有限公司 | Standard gas distributing instrument and temperature compensation control device and temperature compensation method |
| CN103295535B (en) * | 2013-04-02 | 2016-01-27 | 苏州佳世达电通有限公司 | A kind of inner temperature regulating method of display and display |
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2005
- 2005-03-10 CN CNB2005100544637A patent/CN100535820C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1831695A (en) | 2006-09-13 |
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Granted publication date: 20090902 Termination date: 20100310 |