CN101655621B - Heating module for liquid crystal display and liquid crystal heating method thereof - Google Patents
Heating module for liquid crystal display and liquid crystal heating method thereof Download PDFInfo
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- CN101655621B CN101655621B CN2008102130358A CN200810213035A CN101655621B CN 101655621 B CN101655621 B CN 101655621B CN 2008102130358 A CN2008102130358 A CN 2008102130358A CN 200810213035 A CN200810213035 A CN 200810213035A CN 101655621 B CN101655621 B CN 101655621B
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Abstract
The invention discloses a heating module for a liquid crystal display and a liquid crystal heating method thereof. The liquid crystal display comprises a first glass panel, a second glass panel and a liquid crystal layer arranged between the first and the second glass panels. The liquid crystal heating method comprises the following steps: firstly, sensing the temperatures of the first and the second glass panels, and calculating the average temperature of the liquid crystal layer according to temperature values of the first and the second glass panels; then, comparing the average temperature with a preset temperature; and when the average temperature is lower than the preset temperature, heating the liquid crystal display.
Description
Technical field
The invention relates to a kind of LCD, particularly about a kind of LCD and liquid crystal heating method thereof with heating unit.
Background technology
In recent years, PC and TV develop towards lightening direction, and therefore, it is lightening day by day that display also is designed to be.So, comprise that (Liquid Crystal Display, flat-panel monitor LCD) have substituted conventional cathode ray tube (CRT) display to LCD.
Figure 1 shows that a kind of structural representation of known LCD.Please refer to Fig. 1, LCD 1 comprises display panels 10 and backlight module 20.Backlight module 20 is arranged at the bottom surface of display panels 10.
But can there be following problem in LCD 1 in use.The liquid crystal molecule of liquid crystal layer 13 can be in the state of temperature balance with the external world, and promptly the temperature of this liquid crystal molecule can be subjected to external influence.Under the environment of LCD 1 at low temperature, be lower than the operating temperature of liquid crystal material when ambient temperature, extraneous low temperature just can make whole LCD 1, and to cross the low liquid crystal molecule reaction velocity that causes slack-off because of temperature, so, the situation of ghost takes place in LCD 1 easily when showing dynamic menu, in addition, the contrast of LCD 1 also can descend, or the unequal problem of color takes place, and the quality of image also is affected.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of heating module and liquid crystal heating method thereof of LCD, to improve the disappearance of prior art.
According to a characteristic of the present invention, the invention provides a kind of heating module of LCD.LCD comprise first face glass, second face glass and be arranged at first face glass and second face glass between liquid crystal layer.Heating module comprises temperature sensing unit, heating unit and controller.Temperature sensing unit comprises first temperature sensor and second temperature sensor.First temperature sensor is coupled to first face glass, and second temperature sensor is coupled to second face glass.Temperature sensing unit utilizes first temperature sensor and second temperature sensor to calculate the medial temperature of liquid crystal layer in view of the above, and compares medial temperature and preset temperature.Heating unit is arranged at first face glass.Controller is coupled to temperature sensing unit and heating unit.When medial temperature is lower than preset temperature, the heating of controller control heating unit.
According to another characteristic of the present invention, the invention provides a kind of liquid crystal heating method, be applied to LCD.LCD comprise first face glass, second face glass and be arranged at first face glass and second face glass between liquid crystal layer.Liquid crystal heating method comprises the following steps.At first, the temperature of sensing first face glass and second face glass.Calculate the medial temperature of liquid crystal layer according to the temperature value of first face glass and second face glass.Then, compare this medial temperature and preset temperature.When this medial temperature is lower than preset temperature, the heating fluid crystal display.
In sum, the heating module of the LCD that the present invention proposes, when liquid crystal temperature was lower than preset temperature, the may command heating unit heated.And the present invention utilizes the temperature of sensing first face glass and second face glass to calculate the medial temperature of liquid crystal layer, so can obtain the actual temperature of liquid crystal layer more accurately, and with this as whether controlling the foundation that heating unit heats.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1 shows that a kind of structural representation of known LCD.
Figure 2 shows that calcspar according to the heating module of the LCD of a preferred embodiment of the present invention.
Figure 3 shows that the heating module according to the LCD of a preferred embodiment of the present invention is arranged at the synoptic diagram of LCD.
Fig. 4 A is depicted as the schematic perspective view according to the LCD of a preferred embodiment of the present invention.
Fig. 4 B is depicted as the schematic perspective view of the LCD of another preferred embodiment according to the present invention.
Figure 5 shows that process flow diagram according to the liquid crystal heating method of the LCD of a preferred embodiment of the present invention.
Embodiment
Figure 2 shows that calcspar, Figure 3 shows that the heating module according to the LCD of a preferred embodiment of the present invention is arranged at the synoptic diagram of LCD according to the heating module of the LCD of a preferred embodiment of the present invention.Please in the lump with reference to figure 2 and Fig. 3.
In present embodiment, heating module 3 comprises temperature sensing unit 31, first flexible circuit board 313, second flexible circuit board 314, controller 37 and heating unit 38.
In present embodiment, temperature sensing unit 31 also comprises first temperature sensor 311, second temperature sensor 312, computing unit 32, amplifier 33, analog-to-digital converter 34, comparer 35 and buffer 36.In other embodiment, temperature sensing unit 31 can be a digital temperature sensing integrated circuit (IC).
Above-mentioned controller 37 couples temperature sensing unit 31 and heating unit 38.First temperature sensor 311 and second temperature sensor 312 couple computing unit 32 respectively.Amplifier 33 couples computing unit 32 and analog-to-digital converter 34 respectively.34 of analog-to-digital converters couple comparer 35.Comparer 35 couples buffer 36 and controller 37 respectively.
In present embodiment, the display panels 40 of LCD 4 comprises first face glass 41, second face glass 42 and liquid crystal layer 43.Liquid crystal layer 43 is arranged between first face glass 41 and second face glass 42.In present embodiment, first face glass 41 can be the glass of color filter substrate, and second face glass 42 is thin film transistor (TFT) (TFT) glass substrate.But the present invention is not limited to this, and in other embodiment, first face glass 41 can be the TFT glass substrate, and second face glass 42 is the glass of color filter substrate.
In present embodiment, first flexible circuit board 313 of heating module 3 is arranged at first face glass 41 of display panels 40, and second flexible circuit board 314 of heating module 3 is arranged at second face glass 42 of display panels 40.Thus, first temperature sensor 311 of temperature sensing unit 31 can be arranged at first flexible circuit board 313, with the temperature of sensing first face glass 41.Second temperature sensor 312 of temperature sensing unit 31 can be arranged at second flexible circuit board 314, with the temperature of sensing second face glass 42.
In present embodiment, heating unit 38 can be heating film or heater strip, and it is arranged at first face glass 41 of display panels 40.But the present invention is not limited to this, and in other embodiment, heating unit 38 also can be arranged at second face glass 42 of display panels 40, and perhaps heating unit 38 can be separately positioned on first face glass 41 and second face glass 42.
In present embodiment, the temperature T of first temperature sensor, 311 sensings, first face glass 41
1, the temperature T of second temperature sensor, 312 sensings, second face glass 42
2Then, the temperature T that senses according to first temperature sensor 311 of computing unit 32
1And second temperature T that senses of temperature sensor 312
2Calculate the medial temperature T of liquid crystal layer 43
3The medial temperature T of liquid crystal layer 43
3It is the temperature T of first face glass 41
1Temperature T with second face glass 42
2Mean value, i.e. T
3=(T
1+ T
2)/2.
After this, the medial temperature T3 of this liquid crystal layer 43 is transformed into a digital signal, and is sent in the comparer 35 via amplifier 33, analog-to-digital converter 34.
When comparer 35 receives the digital signal that analog-to-digital converter 34 transmits, then this digital signal and the value that is stored in the preset temperature in the buffer 36 can be compared, and control controller 37 runnings according to comparative result.For example, when this digital signal value during less than the value of preset temperature, comparer 35 outputs one first state control signal to controller 37.In present embodiment, first state can be the low level state.
In present embodiment, controller 37 can 38 heating of control heating unit after receiving the control signal of this first state.Particularly, the heat that heating unit 38 produces can conduct to first face glass 41 earlier, and then conducts to liquid crystal layer 43 again.Can realize the purpose of heating fluid crystal layer 43 with this.
Otherwise, when this digital signal value during greater than preset temperature, comparer 35 outputs one second state control signal to controller 37.In present embodiment, second state can be the high levle state.Controller 37 stops the heating of heating unit 38 according to the control signal of this second state.
When heating module 3 was implemented in a portable electronic devices, for example, notebook computer, controller 37 can be embedded controller (EC), and in other embodiments, heating module 3 can be super I/O chip or microprocessor.Particularly, when controller 37 was embedded controller, it comprised usually and is available for users to self-defining pin.So, can control the running of heating unit 38 by the programming of embedded controller.
In addition, the preset temperature value in the temperature sensing unit 31 can be adjusted by software.For example, preset temperature is initially set-20 ℃, can set by the Basic Input or Output System (BIOS) (BIOS) of portable electronic devices this preset temperature is adjusted into-15 ℃.
Fig. 4 A is depicted as the schematic perspective view according to the LCD of a preferred embodiment of the present invention.Please refer to Fig. 4 A, in present embodiment, LCD 4 also comprises rectangle housing 44 and housing 45.Rectangle housing 44 interconnects to form accommodation space S with housing 45.First face glass 41, liquid crystal layer 43 and second face glass 42 are set in turn among the accommodation space S.
In present embodiment, housing 45 can be connected in second face glass 42 among Fig. 3, and second temperature sensor 312 is arranged between the housing 45 and second face glass 42.
In present embodiment, first temperature sensor 311 and second temperature sensor 312 lay respectively in the orthogonal projection on the rectangle housing 44 on the limit, two opposite sides of rectangle housing 44, as the limit, the left and right sides among Fig. 4 A, and become symmetric relation.So, can guarantee that the medial temperature of the liquid crystal layer that calculates is more accurate.But the present invention is not limited to this, and in other embodiment, first temperature sensor 311 and second temperature sensor 312 lay respectively on the dual-side up and down of rectangle housing 44 in the orthogonal projection on the rectangle housing 44.
Fig. 4 B is depicted as the schematic perspective view of the LCD of another preferred embodiment according to the present invention.Please refer to Fig. 4 B, LCD 4 also comprises rectangle housing 44 and housing 45.Housing 44 is all identical with Fig. 4 A with the position setting of housing 45, so do not repeat them here.
Yet in present embodiment, first temperature sensor 311 and second orthogonal projection of temperature sensor 312 on rectangle housing 44 lay respectively at two corners of rectangle housing 44, as the upper left corner among Fig. 4 B and the lower right corner, and paired angular dependence.So, the medial temperature that also can guarantee the liquid crystal layer that calculates is more accurate.But the present invention is not limited to this, and in other embodiment, first temperature sensor 311 and second orthogonal projection of temperature sensor 312 on rectangle housing 44 lay respectively at the upper right corner and the lower left corner of rectangle housing 44.
Figure 5 shows that process flow diagram according to the liquid crystal heating method of the LCD of a preferred embodiment of the present invention.The explanation of relevant this method is please in the lump with reference to figure 2, Fig. 3 and Fig. 5.
At first, in step S51, the temperature T of first temperature sensor, 311 sensings, first face glass 41 of temperature sensing unit 31
1, the temperature T of second temperature sensor, 312 sensings, second face glass 42
2
Then, in step S52, the computing unit 32 of temperature sensing unit 31 receives the temperature T of first face glass 41
1Temperature T with second face glass 42
2, calculate the medial temperature T of liquid crystal layer 43 with this
3, T wherein
3=(T
1+ T
2)/2.
In step S53, temperature sensing unit 31 is with the medial temperature T of the liquid crystal layer 43 that calculates
3Make comparisons with a preset temperature.And, export control signal according to this comparative result.
Particularly, shown in step S54, as the medial temperature T of liquid crystal layer 43
3When being lower than preset temperature, temperature sensing unit 31 outputs one have the control signal of first state.In present embodiment, first state is the low level state.
Afterwards, shown in step S55, when controller 37 receives this control signal with first state, just can control heating unit 38 heating fluid crystal displays 4.
Otherwise, shown in step S56, as the medial temperature T of liquid crystal layer 43
3When being higher than preset temperature, temperature sensing unit 31 outputs one have the control signal of second state.In present embodiment, second state is the high levle state.
Then, shown in step S57, when controller 37 receives this control signal with second state, stop heating fluid crystal display 4 just can control heating unit 38.
In sum, the heating module that preferred embodiment of the present invention discloses utilizes the temperature of sensing first face glass and second face glass to calculate the medial temperature of liquid crystal layer, so can obtain the actual temperature of liquid crystal layer more accurately.And when the medial temperature that calculates liquid crystal layer was lower than preset temperature, controller may command heating unit heated.So, can guarantee under low temperature environment the normal operation of LCD.
Though the present invention discloses as above with specific embodiment; so it is only in order to illustrate technology contents of the present invention; and be not with narrow sense of the present invention be defined in this embodiment; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (17)
1. the heating module of a LCD, above-mentioned LCD comprise first face glass, second face glass and be arranged at above-mentioned first face glass and above-mentioned second face glass between liquid crystal layer, it is characterized in that above-mentioned heating module comprises:
Temperature sensing unit, comprise first temperature sensor and second temperature sensor, above-mentioned first temperature sensor is coupled to above-mentioned first face glass with the sensing first face glass temperature, above-mentioned second temperature sensor is coupled to above-mentioned second face glass with the sensing second face glass temperature, the said temperature sensing cell calculates the medial temperature of the mean value of above-mentioned first face glass temperature and the above-mentioned second face glass temperature as above-mentioned liquid crystal layer in view of the above, said temperature sensing cell and more above-mentioned medial temperature and preset temperature;
Heating unit is arranged at above-mentioned first face glass; And
Controller is coupled to said temperature sensing cell and above-mentioned heating unit, and when above-mentioned medial temperature was lower than above-mentioned preset temperature, above-mentioned controller was controlled above-mentioned heating unit heating.
2. heating module according to claim 1 is characterized in that, above-mentioned heating unit is heating film or heater strip.
3. heating module according to claim 1, it is characterized in that, above-mentioned heating module also comprises first flexible circuit board and second flexible circuit board, be arranged at above-mentioned first face glass and above-mentioned second face glass of above-mentioned LCD respectively, and above-mentioned first temperature sensor is arranged on above-mentioned first flexible circuit board, and above-mentioned second temperature sensor is arranged at above-mentioned second flexible circuit board.
4. heating module according to claim 1 is characterized in that, said temperature sensing cell output control signal, and above-mentioned controller judges whether to control above-mentioned heating unit heating according to above-mentioned control signal.
5. heating module according to claim 4 is characterized in that, when the medial temperature of the liquid crystal layer of above-mentioned LCD was lower than above-mentioned preset temperature, above-mentioned control signal was first state, and above-mentioned controller is controlled above-mentioned heating unit heating.
6. heating module according to claim 5 is characterized in that, when the medial temperature of the liquid crystal layer of above-mentioned LCD was higher than above-mentioned preset temperature, above-mentioned control signal was second state, and above-mentioned controller is controlled above-mentioned heating unit and stopped heating.
7. heating module according to claim 1 is characterized in that the said temperature sensing cell also comprises buffer, to store the value of above-mentioned preset temperature.
8. heating module according to claim 1 is characterized in that above-mentioned heating module is applied to portable electronic devices.
9. heating module according to claim 8 is characterized in that, above-mentioned controller is embedded controller, super I/O chip or microprocessor.
10. heating module according to claim 8 is characterized in that above-mentioned portable electronic devices comprises Basic Input or Output System (BIOS), in order to adjust the value of above-mentioned preset temperature.
11. heating module according to claim 1 is characterized in that, above-mentioned LCD also comprises:
Housing is connected in above-mentioned second face glass, and above-mentioned second temperature sensor is arranged between above-mentioned housing and above-mentioned second face glass; And
The rectangle housing is connected in above-mentioned housing and above-mentioned first face glass, and above-mentioned first temperature sensor is arranged between above-mentioned rectangle housing and above-mentioned first face glass.
12. heating module according to claim 11 is characterized in that, above-mentioned first temperature sensor and above-mentioned second temperature sensor lay respectively on the limit, two opposite sides of above-mentioned rectangle housing in the orthogonal projection on the above-mentioned rectangle housing, and become symmetric relation.
13. heating module according to claim 11 is characterized in that, above-mentioned first temperature sensor and the orthogonal projection of above-mentioned second temperature sensor on above-mentioned rectangle housing lay respectively at two corners of above-mentioned rectangle housing, and paired angular dependence.
14. the liquid crystal heating method of a LCD, above-mentioned LCD comprise first face glass, second face glass and be arranged at above-mentioned first face glass and above-mentioned second face glass between liquid crystal layer, it is characterized in that above-mentioned liquid crystal heating method comprises the following steps:
The temperature of above-mentioned first face glass of sensing and above-mentioned second face glass;
Calculate the medial temperature of the mean value of above-mentioned first face glass and the above-mentioned second face glass temperature as above-mentioned liquid crystal layer;
More above-mentioned medial temperature and preset temperature; And
When above-mentioned medial temperature is lower than above-mentioned preset temperature, heat above-mentioned LCD.
15. liquid crystal heating method according to claim 14 is characterized in that, above-mentioned liquid crystal heating method also comprises:
Behind more above-mentioned medial temperature and above-mentioned preset temperature, the output control signal.
16. liquid crystal heating method according to claim 15 is characterized in that, when above-mentioned medial temperature was lower than above-mentioned preset temperature, above-mentioned control signal was first state, heated above-mentioned LCD.
17. liquid crystal heating method according to claim 16 is characterized in that, when above-mentioned medial temperature was higher than above-mentioned preset temperature, above-mentioned control signal was second state, stopped to heat above-mentioned LCD.
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| CN2008102130358A CN101655621B (en) | 2008-08-20 | 2008-08-20 | Heating module for liquid crystal display and liquid crystal heating method thereof |
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| CN2008102130358A CN101655621B (en) | 2008-08-20 | 2008-08-20 | Heating module for liquid crystal display and liquid crystal heating method thereof |
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| CN101655621B true CN101655621B (en) | 2011-06-15 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120066766A (en) * | 2010-12-15 | 2012-06-25 | 삼성전자주식회사 | Liquid crystal display and driving method threrof |
| CN102736647A (en) * | 2011-04-08 | 2012-10-17 | 精拓科技股份有限公司 | Dynamic heating device of system environment and dynamic heating method thereof |
| CN103424904A (en) * | 2012-05-17 | 2013-12-04 | 深圳市精锐通实业有限公司 | Liquid crystal display module with heating apparatus |
| CN102938236A (en) * | 2012-10-22 | 2013-02-20 | 合肥京东方光电科技有限公司 | Liquid crystal display device |
| US9182622B2 (en) * | 2013-11-21 | 2015-11-10 | Omnivision Technologies, Inc. | Thermal carrier for an LCOS display panel and associated methods |
| CN106814486B (en) * | 2015-11-30 | 2020-10-13 | 惠州市德赛西威汽车电子股份有限公司 | LCD screen capable of displaying at low temperature and heating method thereof |
| CN105588655B (en) * | 2016-03-09 | 2018-05-01 | 深圳市华星光电技术有限公司 | The temperature sensing system and liquid crystal display panel being integrated in liquid crystal display panel |
| CN107340562B (en) * | 2017-08-22 | 2019-07-02 | 深圳市华星光电技术有限公司 | Light guide plate and liquid crystal display |
| CN108806633A (en) * | 2018-07-09 | 2018-11-13 | 深圳市华星光电半导体显示技术有限公司 | The start-up control method and liquid crystal display device of liquid crystal display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920505A (en) * | 2005-07-15 | 2007-02-28 | 三星电子株式会社 | Temperature sensor, thin film transistor array panel, liquid crystal display |
| CN101174040A (en) * | 2006-11-01 | 2008-05-07 | 群康科技(深圳)有限公司 | LCD device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920505A (en) * | 2005-07-15 | 2007-02-28 | 三星电子株式会社 | Temperature sensor, thin film transistor array panel, liquid crystal display |
| CN101174040A (en) * | 2006-11-01 | 2008-05-07 | 群康科技(深圳)有限公司 | LCD device |
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