CN2327038Y - Reinforced liquid-crystal display - Google Patents
Reinforced liquid-crystal display Download PDFInfo
- Publication number
- CN2327038Y CN2327038Y CN 98230448 CN98230448U CN2327038Y CN 2327038 Y CN2327038 Y CN 2327038Y CN 98230448 CN98230448 CN 98230448 CN 98230448 U CN98230448 U CN 98230448U CN 2327038 Y CN2327038 Y CN 2327038Y
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- temperature
- lcd
- semiconductor cooler
- control circuit
- lcd assembly
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Abstract
The utility model relates to a liquid-crystal display, which comprises an LCD assembly, a power supply, a case, and a temperature regulator composed of a temperature sensor, a semiconductor cooler heating or cooling by electricity and a temperature control circuit in connection. A baffle for isolating the power supply and the LCD assembly is arranged between the power supply and the LCD components. The temperature regulator is arranged in a closed region at the position of the LCD components. According to external temperature, the temperature regulator controls the semiconductor cooler to heat or cool to keep the temperature in the region of the LCD assembly within a normal view display operation range. The utility model which is suitable for being used in the severe environment can keep favorable display effect when the external temperature is too high or too low.
Description
The utility model relates to a kind of LCD.
On the monitor market, mainly contain cathode ray tube type display and LCD at present, the cathode ray tube type display has many shortcomings, as bulky, heavy, kinescope fragile perishable, need high voltage drive etc., the shows signal of cathode-ray tube (CRT) magnetic interference to external world is also responsive especially in addition; LCD then has advantages such as little, the no high pressure of volume, electromagnetic radiation are little, magnetic interference is insensitive to external world, its principle be with sealing liquid crystal among the layer glass base stage, then be covered with the membrane electrode that is arranged in matrix on the base stage, owing to the light characteristic of liquid crystal along with row-column electrode institute making alive changes, thereby produce the dark picture of light.But it is responsive especially to temperature that LCD has a disadvantage, and it can only be operated in the narrow temperature range, and reason is when ambient temperature uprises, liquid crystal is with regard to liquefy, when ambient temperature was low, liquid crystal just became the crystal attitude, showed thereby influence is normal.
For satisfying display at the need of work under the rugged surroundings, under the environment that especially temperature variation is bigger, reinforcing display device in the past adopts the cathode ray tube type display that volume is big, weight is big more, and volume and weight is required harsh especially in military equipments such as submarine and aircraft.Along with requiring content displayed more and more, the more display of giant-screen is used in requirement, traditional cathode ray tube type display can not meet the demands, only may adopt flat-panel monitor, and LCD is because colored abundant, the preferred unit that becomes low in energy consumption, but at first must solve the narrow problem of LCD operating temperature range.
The purpose of this utility model is to provide a kind of can guarantee that LCD is operated in the normal displays temperature scope, still has the reinforcement type LCD of good display effect under external world's environment too high or too low for temperature.
The technical solution of the utility model is as follows: the reinforcement type LCD of the utility model comprises LCD assembly, power supply and housing, wherein also comprise by temperature sensor, can connect the temperature regulator of forming by semiconductor cooler, the temperature-control circuit of electricity heating or refrigeration, be provided with the dividing plate with the two isolation between power supply and LCD assembly, temperature regulator is arranged in the residing closed region of LCD assembly.The temperature sensor of temperature regulator detects the working temperature of LCD assembly and the normal working temperature value that preset temperature value and temperature regulator inside is compared, when the working temperature value less than or during greater than the normal working temperature value, then generate heat or refrigeration, thereby the working temperature value of LCD assembly is remained in the normal working temperature scope by temperature-control circuit control semiconductor cooler.For raising, the temperature that the bigger power unit of thermal value is produced do not influence the working temperature of LCD assembly, so adopting dividing plate separates the power supply and the LCD assembly of display housing inside, the heat that power work produced can be directly transferred to outside by housing, also conductively-closed of power supply simultaneously, can prevent the interference of power supply, guarantee display effect LCD assembly work.
The temperature-control circuit of temperature regulator described in the utility model connects temperature sensor and semiconductor cooler respectively, wherein temperature-control circuit comprises temperature setting circuit, voltage comparator and logic control circuit, the output terminal of temperature setting circuit and temperature sensor connects the input end of voltage comparator, the output terminal of voltage comparator connects logic control circuit, have two may command to be added in the relay of polarity of voltage on the semiconductor cooler in the logic control circuit, this relay tip links to each other with semiconductor cooler.Temperature setting circuit can be set beginning refrigeration value, stops the refrigeration value, begins heat value, stop heat value and temperature alarm value, these setting values compare by the temperature value of the LCD assembly that voltage comparator and temperature sensor are surveyed, logic control circuit according to comparative result control semiconductor cooler refrigeration respectively, stop refrigeration, heat, stop the heating and in the time can't keeping normal working temperature with sound and light alarm.Semiconductor cooler is right by some galvanic couples that special N-type semiconductor and P-type semiconductor are formed, and adopts the metal plate to connect between the two ends of N-type semiconductor and P-type semiconductor respectively.It is to be based upon Po Er a kind of heating, cooler on several different effect bases such as to paste, when direct current when the N type flows to the P type, an end cooling by heat absorption (title cold junction) of this galvanic couple, other end heat release (title hot junction), when the direct current direction flowed conversely, then cold and hot end exchanged.The utility model is added in the direction and the conduction time of the electric current on the semiconductor cooler just by control, realize refrigeration and heating to LCD assembly zonule of living in.The relay of two single-pole double-throw (SPDT)s of logic control circuit may command, thus control outputs to the forward and reverse of DC voltage on the semiconductor cooler.
The utility model wall within LCD assembly closed region of living in posts the thermofin that heat-barrier material is made, the perform region and the external environment condition of LCD assembly are isolated, strengthen effect of heat insulation, form an energy and carry out temperature controlled environmental area by the LCD job requirement.
The utility model is in the residing closed region of LCD assembly, and semiconductor cooler is attached on the interior cold drawing that has the air channel groove, is provided with fan between LCD assembly and semiconductor cooler.The air channel groove of fan and interior cold drawing forms interior air channel in the lump, fan can be constantly with heat (or cold) the air inspiration of LCD assembly direction and through the interior cold drawing air channel groove by semiconductor cooler refrigeration (or heating) become cold (or) air, blow to LCD assembly again, form flowing in order of hot cold air, LCD assembly is operated in the normal temperature range.
One end of semiconductor cooler of the present utility model places in the residing closed region of LCD assembly to regulate the temperature in this zone, the other end places outside the housing, and be attached on the heat-conducting plate, heat-conducting plate is attached on the outer cold drawing that has the air channel groove, fan is equipped with in outer cold drawing side, and outer cold drawing peripheral hardware has the outer duct shield that covers this outer cold drawing.Form outer air channel jointly by fan, outer cold drawing and outer duct shield, fan blows into ambient air in the outer air channel, constantly take away the heat or the cold air of outer cold drawing,, finish refrigeration or heating the LCD assembly zone so that semiconductor cooler is in normal duty.Logic control circuit is at control semiconductor cooler refrigeration or adstante febre, and also the commentaries on classics of air channel and outer air channel fan stops in the may command, makes fan rotate stall at ordinary times when semiconductor cooler is worked.
In sum, the utility model carries out temperature control by temperature regulator to LCD assembly zonule of living in, can guarantee that LCD is operated in the normal displays temperature scope, even still have good display effect under the bigger environment of temperature variation, so the utility model can satisfy under the rugged surroundings, especially ambient temperature is crossed the application need under the low or too high environment.The utility model volume is little, and is in light weight, is particularly useful for the big screen LCD structure, and display performance is reliable and stable.
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is a front view of the present utility model;
Fig. 2 is side of the present utility model and partial sectional view thereof;
Fig. 3 is the face of overlooking and the partial sectional view thereof of Fig. 2;
Fig. 4 is the principle assumption diagram of semiconductor cooler;
Fig. 5 is the theory structure block diagram of temperature regulator of the present utility model;
Fig. 6 is the circuit diagram of temperature regulator of the present utility model.
Fig. 1 is a profile front view of the present utility model, similar to general display, but be provided with " heating, refrigeration, overheated, power supply " one of four states pilot lamp in its lower right, respectively the reflecting liquid crystal display module be in semiconductor cooler heating or refrigeration condition, be in the duty of superheat state and power supply." screen control ", " go up ", " are descended " etc. four buttons confession users adjust display performance.Shown in Figure 2, do not influence the working temperature of LCD assembly for the temperature rise that makes the bigger power supply of thermal value, display case inside is separated into power work district 2 and LCD assembly workspace 3, power supply is contained in the power work district of cabinet housing rear lower, and its heat can be directly transferred to the outside by housing; Outer air channel fan 4 is contained in the housing rear portion, and it is in normal duty to the outer cold drawing blowing of semiconductor cooler to keep semiconductor cooler, and outer cold drawing links by heat-conducting plate 12 and semiconductor cooler; Hook 1 and dowel hole 5 are to be convenient to and the different user coupling.In the LCD assembly workspace 3 in housing, as shown in Figure 3, LCD assembly 8 is installed in the front portion of display, all post thermofin 13 on the inwall of LCD assembly workspace, this district and external environment condition are isolated, form a controllable temperature environment district, semiconductor cooler 11 is equipped with on the opposite of the LCD assembly in this district, and it is close on the interior cold drawing 6 by thermal grease conduction; Have the air channel groove on the interior cold drawing 6, two DC fan 7 are housed above interior cold drawing 6.The air channel groove of fan 7 and interior cold drawing forms interior air channel in the lump; What can form hot cold air during fan 7 work in this zone flows the direction indication air-flow direction among Fig. 3 shown in the arrow of display housing inside in order.The other end of the semiconductor cooler 11 in being contained on the cold drawing 6, also be close on the heat-conducting plate 12 by thermal grease conduction, heat-conducting plate 12 is transmitted to its heat (or cold) on the outer cold drawing 10 again, have the air channel groove on the outer cold drawing 10, two DC fan 4 are equipped with in its side, form outer air channel jointly by fan 4, outer cold drawing 10, outer duct shield 9, fan 4 blows into the heat (or cold) of constantly taking away outer cold drawing 10 in the outer air channel with ambient air, the arrow of Fig. 3 left margin represent the air turnover direction in outer air channel be from enterprising, under go out.
Fig. 4 is the theory structure of semiconductor cooler, the galvanic couple of semiconductor cooler is to utilize special N-type semiconductor 1101 and P-type semiconductor 1102, can be welded with copper plate 1103,1104 respectively with the lower end in the top, one deck electric-insulation heat-conduction layer 1105 and 1106 is arranged in the copper plate, on this electric-insulation heat-conduction layer, be provided with heat-conducting plate 1107 and 1108.When adding direct supply 1109 direct current when the N type flows to the P type, produce the heat absorption phenomenon in the upper end copper plate 1103 among Fig. 4, form cold junction, and produce exothermic phenomenon in the lower end copper plate 1104, form the hot junction.If direction of current flows conversely, then cold and hot end exchanges.Therefore controlled the direction of current and the conduction time at these semiconductor cooler two ends, just can carry out refrigeration and heating subenvironment.The utility model has utilized this characteristic of semiconductor just.
Fig. 5 and Fig. 6 have reflected the structure of temperature regulator, temperature regulator designs for automatic refrigeration and low temperature under the utility model portion's realization within it high temperature heat down automatically, be the maincenter control section of regulating internal temperature, it comprises temperature setting circuit, voltage comparator, logic control circuit and temperature sensor and semiconductor cooler.
The output of temperature sensor is a voltage that is directly proportional with temperature value, and temperature sensor is connected in 4 pin of the socket J1 among Fig. 6, one termination+12V voltage, and the other end connects 5 input ends of voltage comparator U3, U4 respectively by J1; Temperature setting circuit comprises 5 potentiometer RC4, RC5, RC6, RC7, RC8, can set respectively and realize control beginning refrigeration, stops refrigeration, begins to heat, stops to heat, the temperature value of temperature alarm; Dividing potential drop by right+12V level, the adjustable side of each potentiometer links to each other with the input end of voltage comparator respectively, its input end input end with temperature sensor respectively is corresponding one by one, wherein RC4 (control beginning refrigeration) and RC5 (control stops refrigeration) connect two negative terminals of voltage comparator U3, RC6 (control begins heating) and RC7 (control stops heating) connect two anodes of voltage comparator U3, and RC8 (control temperature alarm) connects the negative terminal of voltage comparator U4; Regulate each potentiometer and can set the control corresponding temperature value.At normal temperatures, the output valve of temperature sensor is less than beginning refrigeration and stop the desired temperature of refrigeration, begin the desired temperature that heats and stop to heat and be higher than, the output of voltage comparator all is low level, then triode 3BG1 and 3BG2 are in cut-off state, two relay R ELAY1 and not adhesives of RELAY2 output to the low level that is at semiconductor cooler two ends, and semiconductor cooler is not worked.RELAY1 and RELAY2 link by socket J3 and semiconductor cooler; By analysis, when ambient temperature is-15 ℃～+ 50 ℃, in the time of keeping the temperature of subenvironment to be+5 ℃～+ 40 ℃, needing the refrigeration heating power is about 100 watts, so can adopt 4 plate electrode thermoelectric cooling modules.Logic control circuit comprises the part of U2, U1, U5, U6,3BG1,3BG2 and relay R ELAY1, RELAY2.
When temperature raises, the output of temperature sensor also constantly raises, when its output valve is higher than the desired temperature that begins refrigeration, the correspondence output of voltage comparator U3 uprises, at this moment the output of U2:A uprises, but because the output of the U3 corresponding with stopping the refrigeration desired temperature still is low level, so the output of U1:A still be low, at this moment with normal temperature under state be the same; When temperature continues to raise, be higher than when stopping the refrigeration desired temperature, the output of the U3 corresponding with stopping the refrigeration desired temperature uprises level, and then U1:A is output as height, and it directly gives rising edge of trigger U6:A clock end, then make U6:A output high level, make the 3BG1 conducting again, the electric current of+12V end flows through the control end of relay, makes the RELAY1 adhesive, the voltage that outputs to semiconductor cooler by J3 is become+24V, this moment semiconductor cooler positive refrigeration reverse side heating; Utilize a pin of a CMOS pipe 640 of high level control of U6:A output simultaneously, make its conducting, then each inside and outside fan of the utility model housing begins to rotate, and accelerates cold and hot transmission.Socket J1 connect respectively temperature sensor, each fan, each status indicator lamp,, overheat alarm ,+the 12V power supply.
When beginning to reduce under the effect of the utility model internal temperature at semiconductor cooler, stop the refrigeration desired temperature in case be lower than, being output as of then corresponding with stopping refrigeration desired temperature U3 is low, give effective low level signal of clear terminal of trigger U6:A this moment, makes the output step-down of U6:A, and then 3BG1 ends, the electric current of+12V end can not flow through the control end of relay, not adhesive of RELAY1, common point ground connection, semiconductor cooler quits work.
When ambient temperature reduces, circuit working principle and mode are the same when raising with temperature, just adhesive and the disconnection of U2:B, the U1:B by logic control circuit, U5:B, U6:B, 3BG2 pilot relay RELAY2, heat or stop to heat with the control semiconductor cooler, do not do repetition at this.
Claims (6)
1, a kind of LCD, comprise LCD assembly, power supply and housing, it is characterized in that also comprising by temperature sensor, can connect the temperature regulator of forming by semiconductor cooler, the temperature-control circuit of electricity heating or refrigeration, be provided with the dividing plate with the two isolation between power supply and LCD assembly, temperature regulator is arranged in the residing closed region of LCD assembly.
2, LCD according to claim 1, the temperature-control circuit that it is characterized in that described temperature regulator connects temperature sensor and semiconductor cooler respectively, wherein temperature-control circuit comprises temperature setting circuit, voltage comparator and logic control circuit, the output terminal of temperature setting circuit and temperature sensor connects the input end of voltage comparator, the output terminal of voltage comparator connects logic control circuit, have two may command to be added in the relay of polarity of voltage on the semiconductor cooler in the logic control circuit, this relay tip links to each other with semiconductor cooler.
3, LCD according to claim 1, it is characterized in that described semiconductor cooler is right by some galvanic couples that special N-type semiconductor and P-type semiconductor are formed, between the two ends of N-type semiconductor and P-type semiconductor, adopt the metal plate to connect respectively.
3, LCD according to claim 1 is characterized in that wall posts the thermofin that heat-barrier material is made within the residing closed region of LCD assembly.
4, LCD according to claim 1 is characterized in that in the residing closed region of LCD assembly, semiconductor cooler is attached on the interior cold drawing that has the air channel groove, is provided with fan between LCD assembly and semiconductor cooler.
5, LCD according to claim 1, the other end that it is characterized in that semiconductor cooler places outside the housing, and is attached on the heat-conducting plate, and heat-conducting plate is attached on the outer cold drawing that has the air channel groove, fan is equipped with in outer cold drawing side, and outer cold drawing peripheral hardware has the outer duct shield that covers this outer cold drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98230448 CN2327038Y (en) | 1998-04-03 | 1998-04-03 | Reinforced liquid-crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98230448 CN2327038Y (en) | 1998-04-03 | 1998-04-03 | Reinforced liquid-crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2327038Y true CN2327038Y (en) | 1999-06-30 |
Family
ID=33980093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98230448 Expired - Fee Related CN2327038Y (en) | 1998-04-03 | 1998-04-03 | Reinforced liquid-crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2327038Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768427A (en) * | 2012-07-13 | 2012-11-07 | 广东富信电子科技有限公司 | Outdoor LCD (Liquid Crystal Display) device and temperature adjustment system thereof |
| CN102982745A (en) * | 2012-07-12 | 2013-03-20 | 深圳市雷盟洋电子科技有限公司 | Outdoor liquid crystal display equipment with semiconductor automatic temperature control system device |
| CN103747660A (en) * | 2014-01-15 | 2014-04-23 | 山东和顺电气有限公司 | Suspension controller heat radiation system applicable to stable work of medium-low-speed magnetic suspension train and application thereof |
| CN109451601A (en) * | 2018-12-16 | 2019-03-08 | 山西汾西重工有限责任公司 | The heating mechanism and heating means of preset device liquid crystal display under low temperature environment |
-
1998
- 1998-04-03 CN CN 98230448 patent/CN2327038Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982745A (en) * | 2012-07-12 | 2013-03-20 | 深圳市雷盟洋电子科技有限公司 | Outdoor liquid crystal display equipment with semiconductor automatic temperature control system device |
| CN102982745B (en) * | 2012-07-12 | 2015-04-22 | 深圳市雷盟洋电子科技有限公司 | Outdoor liquid crystal display equipment with semiconductor automatic temperature control system device |
| CN102768427A (en) * | 2012-07-13 | 2012-11-07 | 广东富信电子科技有限公司 | Outdoor LCD (Liquid Crystal Display) device and temperature adjustment system thereof |
| CN103747660A (en) * | 2014-01-15 | 2014-04-23 | 山东和顺电气有限公司 | Suspension controller heat radiation system applicable to stable work of medium-low-speed magnetic suspension train and application thereof |
| CN103747660B (en) * | 2014-01-15 | 2016-06-01 | 山东和顺电气有限公司 | The suspension controller heat-removal system of middle low speed magnetic suspension train steady operation and application |
| CN109451601A (en) * | 2018-12-16 | 2019-03-08 | 山西汾西重工有限责任公司 | The heating mechanism and heating means of preset device liquid crystal display under low temperature environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |