CN103607796A - Heater made from screen mesh thin film and manufacturing method thereof - Google Patents
Heater made from screen mesh thin film and manufacturing method thereof Download PDFInfo
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- CN103607796A CN103607796A CN201310648139.2A CN201310648139A CN103607796A CN 103607796 A CN103607796 A CN 103607796A CN 201310648139 A CN201310648139 A CN 201310648139A CN 103607796 A CN103607796 A CN 103607796A
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Abstract
The invention discloses a heater made from a screen mesh thin film and a manufacturing method of the heater. The heater comprises an electrode strip, a conductive clad layer and a substrate material. The substrate material is coated with the conductive clad layer. The electrode strip is connected to the conductive clad layer. A plurality of openings are etched into the conductive clad layer so that the screen mesh thin film can be formed on the conductive clad layer, wherein the wire diameter of the screen mesh thin film ranges from 5 micrometers to 30 micrometers, and the aperture ratio of the screen mesh thin film is above 80%. The manufacturing method of the heater comprises the following steps that the substrate material is coated with the conductive clad layer, and then the multiple openings are formed in the conductive clad layer in an exposure etching mode so that the screen mesh thin film can be formed on the conductive clad layer. According to the heater made from the screen mesh thin film, the surface resistance distribution of a conductive surface of the heater is controlled through adjustment of the screen mesh thin film, so that the heating uniformity of a liquid crystal display screen at a low temperature is realized; on one hand, the usage of an auxiliary heating membrane is avoided; on the other end, the solution also can well solve the problem of temperature maldistribution for a liquid crystal display screen with a large area.
Description
Technical field
The present invention relates to a kind of LCDs heater, heater that in particular a kind of silk screen film is made and preparation method thereof.
Background technology
Liquid crystal material has the feature of optical anisotropy and electrical anisotropy, and under applied voltage is controlled, liquid crystal molecule can rotate, and makes the refractive index of liquid crystal or transmitance that corresponding variation also occur.LCDs is exactly by applied voltage, to control the rotation of liquid crystal molecule, thereby control the light penetration of liquid crystal display screen, to realize information display function.
Liquid crystal material is organic material, its physical properties variation with temperature and changing, under low temperature, the viscosity of liquid crystal material increases, drive the voltage threshold that liquid crystal molecule rotates to rise, liquid crystal molecule overcomes the time growth that resistance rotates required, these all can cause the transmitance of LCDs to reduce, the response time increases, display performance declines, and even loses Presentation Function.The low-temperature working limiting temperature of liquid crystal display screen is-30 ℃ at present.
For liquid crystal display screen can be worked under the environment of lower temperature (45 ℃ are even lower), must use extra heater element to heat liquid crystal display screen, make the temperature of liquid crystal display screen higher than its working temperature lower limit, to realize normal operation.Chinese patent: CN102004505A, the heating means of ITO heater and liquid crystal display, conventional solution is disclosed: at bonding heater glass and the one piece of temperature sensor with certain resistance in the back side of liquid crystal display screen, circuit control panel is by the actual temperature of temperature sensor senses liquid crystal display screen, if the temperature of liquid crystal display screen is lower than a certain set point, control circuit is to heating installation power supply, to produce heat, make the temperature of liquid crystal display screen increase, if the temperature of liquid crystal display screen is higher than a certain set point, control circuit stops heating installation power supply, to prevent that liquid crystal display screen from causing damage because of over-heating.This heater glass is generally by plate the uniform ITO layer 1 ' of one deck resistance on base plate glass, and form at the both sides of ITO layer 1 ' making electrode strip 2 ', as shown in Figure 1, its electric current distribution in energising situation is comparatively even, and as shown in Figure 2, the heat of generation is also comparatively evenly distributed on whole, but because the heat loss of liquid crystal display screen neighboring area is more, therefore cause final Temperature Distribution for middle high, periphery is lower, as shown in Figure 3.Such Temperature Distribution causes the core display effect of liquid crystal display screen and the display effect of neighboring area to have larger difference, shows as neighboring area Picture switch slow, and color is abnormal when showing some picture.
For solving above-mentioned display defect; Chinese patent: CN102879936A; a kind of device for homogenous heating and liquid crystal display that is applied to liquid crystal display; public technology is as follows: conventionally can increase a compensatory heating film 4 ' with certain resistance in the surrounding of liquid crystal display screen 3 '; as shown in Figure 4; by circuit, control the energising situation of this heating film 4 ' and scatter and disappear with the temperature of compensation liquid crystal display screen 3 ' neighboring area, with this, realize being uniformly distributed of whole upper temperature of liquid crystal display screen 3 ' and good display effect.But this settling mode can increase technology difficulty and the cost of whole display device on the one hand, and for the larger liquid crystal display screen 3 ' of area, this solution not can solve the problem of temperature distributing disproportionation on the other hand.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, heater of a kind of silk screen film making and preparation method thereof is provided, in the situation that additionally not using heating compensate film, by adjusting the distribution of silk screen film patterns of openings, solve the homogeneity question heating under liquid crystal display screen low temperature.
The present invention is achieved by the following technical solutions, and heater of the present invention comprises electrode strip, conductive coating and base material, and described conductive coating is coated with and is plated on base material, and electrode strip is connected on conductive coating; On described conductive coating, a plurality of openings of etching make conductive coating form silk screen film, and the string diameter of described silk screen film is 5～30 μ m, and the aperture opening ratio of silk screen film is more than 80%.
Described electrode strip is Copper Foil, and electrode strip is bonded on conductive coating by conducting resinl.
The liquid crystal display of using the heater of described silk screen film making, comprises liquid crystal display screen, heater, temperature sensor, backlight assembly, structural framing, circuit control panel; Described liquid crystal display screen, heater, backlight assembly and circuit control panel are set in turn in structural framing, and temperature sensor is arranged in liquid crystal display screen, and electrode strip is connected with circuit control panel.
A manufacture method for the heater that silk screen film is made, comprises the following steps:
(1) coating one deck conductive coating on base material;
(2) then by the method for exposure etching, on conductive coating, offer a plurality of openings, make conductive coating form silk screen film.
Position and the shape aperiodicity of described a plurality of opening on conductive coating repeats.
The square resistance of the neighboring area of described conductive coating is less than the square resistance of zone line.When control circuit is during to heating installation power supply, the current density of the heater neighboring area of flowing through is relatively large, and the heat of generation is also relatively high, thereby has made up the heat loss of liquid crystal display screen neighboring area, has realized the homogeneous heating under liquid crystal display screen low temperature.
The present invention has the following advantages compared to existing technology: the present invention is by adjusting the resistivity of silk screen film, parameters such as the density of etching opening pattern, sizes, face resistance with control heater conducting surface distributes, thereby solve the homogeneity question heating under liquid crystal display screen low temperature, avoided on the one hand the use of auxiliary heating film, thereby technology difficulty and the cost of whole display device have been reduced, for the larger liquid crystal display screen of area, this solution also can solve the problem of temperature distributing disproportionation preferably on the other hand.
Accompanying drawing explanation
Fig. 1 is the structural representation of common heater;
Fig. 2 is the CURRENT DISTRIBUTION schematic diagram in the heater energising situation of Fig. 1;
Fig. 3 is the Temperature Distribution schematic diagram of liquid crystal display screen while using the heater of Fig. 1;
Fig. 4 is compensatory heating film schematic diagram;
Fig. 5 is the structural representation of liquid crystal display of the present invention;
Fig. 6 is the structural representation of heater of the present invention;
Fig. 7 is heater when energising current distributions schematic diagram of Fig. 6;
Fig. 8 is the opening figure schematic diagram of conductive coating.
Embodiment
Below embodiments of the invention are elaborated, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 5, the liquid crystal display of the present embodiment comprises liquid crystal display screen 1, heater 2, temperature sensor, backlight assembly 3, structural framing 5, circuit control panel 4; Described liquid crystal display screen 1, heater 2, backlight assembly 3 and circuit control panel 4 are set in turn in structural framing 5, and temperature sensor is arranged in liquid crystal display screen 1, and electrode strip is connected with circuit control panel 4.Liquid crystal display screen 1 and backlight assembly 3 are for realizing the Presentation Function of LCD MODULE, temperature sensor is fixed a certain position that does not affect its optics demonstration with liquid crystal display screen 1, circuit control panel 4 is by the actual temperature of temperature sensor senses liquid crystal display screen 1, if the temperature of liquid crystal display screen 1 is lower than a certain set point, 4 pairs of heaters 2 of circuit control panel are powered, to produce heat, make the temperature of liquid crystal display screen 1 increase, if the temperature of liquid crystal display screen 1 is higher than a certain set point, control circuit stops heater 2 power supply, to prevent that liquid crystal display screen 1 from causing damage because of over-heating.
As shown in Figure 6, heater 2 comprises electrode strip 21, conductive coating 22 and base material (not shown), and described conductive coating 22 is coated with and is plated on base material, and electrode strip 21 is connected on conductive coating 22; On described conductive coating 22, a plurality of openings 23 of etching make conductive coating 22 form silk screen film, and the string diameter of described silk screen film is 5～30 μ m, and opening 23 rates of silk screen film are more than 80%.Described electrode strip 21 is Copper Foil or the very low sheet metal of other volume resistances, and electrode strip 21 is bonded on conductive coating 22 by conducting resinl.
A manufacture method for the heater 2 that silk screen film is made, comprises the following steps:
(1) coating one deck conductive coating 22 on base material;
(2) then by the method for exposure etching, offer a plurality of openings 23 on conductive coating 22, make conductive coating 22 form silk screen film, transmitance reaches more than 80%.
Position and the shape aperiodicity of described a plurality of opening 23 on conductive coating 22 repeats, to avoid producing interference with liquid crystal display screen 1 picture element matrix; By regulating the parameters such as the resistivity of electric conducting material, the density that changes etching pattern, size to control conductive coating 22 at the square resistance of heater 2 zoness of different, as shown in Figure 8; Finally by constantly test and optimize the resistivity of conductive coating 22, parameters such as the density of etching pattern, sizes of test, thereby making place goes out satisfactory silk screen thin film heater 2, for realizing liquid crystal display homogeneous heating at low temperatures.
Claims (6)
1. the heater that a silk screen film is made, it is characterized in that, described heater (2) comprises electrode strip (21), conductive coating (22) and base material, and described conductive coating (22) is coated with and is plated on base material, and electrode strip (21) is connected on conductive coating (22); The upper a plurality of openings of etching of described conductive coating (22) make conductive coating (22) form silk screen film, and the string diameter of described silk screen film is 5～30 μ m, and the aperture opening ratio of silk screen film is more than 80%.
2. the heater (2) that silk screen film according to claim 1 is made, is characterized in that, described electrode strip (21) is Copper Foil, and electrode strip (21) is bonded on conductive coating (22) by conducting resinl.
3. the liquid crystal display of using the heater (2) of silk screen film making as claimed in claim 1, comprises liquid crystal display screen (1), heater (2), temperature sensor, backlight assembly (3), structural framing (5), circuit control panel (4); Described liquid crystal display screen (1), heater (2), backlight assembly (3) and circuit control panel (4) are set in turn in structural framing (5), and temperature sensor is arranged in liquid crystal display screen (1), and electrode strip (21) is connected with circuit control panel (4).
4. a manufacture method for the heater (2) that silk screen film is made, is characterized in that, comprises the following steps:
(1) coating one deck conductive coating (22) on base material;
(2) then by the method for exposure etching, on conductive coating (22), offer a plurality of openings, make conductive coating (22) form silk screen film.
5. the manufacture method of the heater (2) that a kind of silk screen film according to claim 4 is made, is characterized in that, position and the shape aperiodicity of described a plurality of openings on conductive coating (22) repeats.
6. the manufacture method of the heater (2) that a kind of silk screen film according to claim 4 is made, is characterized in that, the square resistance of the neighboring area of described conductive coating (22) is less than the square resistance of zone line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310648139.2A CN103607796A (en) | 2013-12-04 | 2013-12-04 | Heater made from screen mesh thin film and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310648139.2A CN103607796A (en) | 2013-12-04 | 2013-12-04 | Heater made from screen mesh thin film and manufacturing method thereof |
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| CN103607796A true CN103607796A (en) | 2014-02-26 |
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| CN201310648139.2A Pending CN103607796A (en) | 2013-12-04 | 2013-12-04 | Heater made from screen mesh thin film and manufacturing method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686778A (en) * | 2017-01-13 | 2017-05-17 | 无锡格菲电子薄膜科技有限公司 | Method for patterning conductive film to improve resistance value of conductive film, method for controlling resistance value of electric heating film and electric heating film with controllable resistance value |
| CN107567116A (en) * | 2017-07-25 | 2018-01-09 | 无锡格菲电子薄膜科技有限公司 | Electrothermal film and preparation method thereof |
| CN111694181A (en) * | 2020-07-07 | 2020-09-22 | 中航华东光电有限公司 | Method for uniformly heating liquid crystal screen assembly at low temperature |
| CN111752026A (en) * | 2020-06-30 | 2020-10-09 | 广州同华实业有限公司 | Liquid crystal display temperature compensation device and liquid crystal display |
| CN111781762A (en) * | 2020-08-04 | 2020-10-16 | 中航华东光电有限公司 | Method for uniformly heating round liquid crystal screen assembly at low temperature |
| CN112394559A (en) * | 2019-08-12 | 2021-02-23 | 群创光电股份有限公司 | Electronic device |
| CN113455860A (en) * | 2021-07-16 | 2021-10-01 | 上海通用富士冷机有限公司 | Be applied to cabinet door and cold-stored showcase of low energy consumption high definition cold-stored showcase |
| CN114080859A (en) * | 2020-03-03 | 2022-02-22 | 株式会社大真空 | Thin film heater, method for manufacturing thin film heater, and thermostat-type piezoelectric oscillator |
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| JP2006024501A (en) * | 2004-07-09 | 2006-01-26 | Gunze Ltd | Transparent surface exothermic body and its manufacturing method |
| JP2007311047A (en) * | 2006-05-16 | 2007-11-29 | Nippon Seiki Co Ltd | Translucent heater |
| CN101510020A (en) * | 2009-03-24 | 2009-08-19 | 天马微电子股份有限公司 | ITO heater and heating method of LCD |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686778A (en) * | 2017-01-13 | 2017-05-17 | 无锡格菲电子薄膜科技有限公司 | Method for patterning conductive film to improve resistance value of conductive film, method for controlling resistance value of electric heating film and electric heating film with controllable resistance value |
| CN106686778B (en) * | 2017-01-13 | 2023-01-06 | 无锡格菲电子薄膜科技有限公司 | Method for improving and controlling resistance of patterned conductive film and electric heating film thereof |
| CN107567116A (en) * | 2017-07-25 | 2018-01-09 | 无锡格菲电子薄膜科技有限公司 | Electrothermal film and preparation method thereof |
| CN107567116B (en) * | 2017-07-25 | 2023-07-18 | 无锡格菲电子薄膜科技有限公司 | Electrothermal film and preparation method thereof |
| CN112394559A (en) * | 2019-08-12 | 2021-02-23 | 群创光电股份有限公司 | Electronic device |
| CN114080859A (en) * | 2020-03-03 | 2022-02-22 | 株式会社大真空 | Thin film heater, method for manufacturing thin film heater, and thermostat-type piezoelectric oscillator |
| CN111752026A (en) * | 2020-06-30 | 2020-10-09 | 广州同华实业有限公司 | Liquid crystal display temperature compensation device and liquid crystal display |
| CN111694181A (en) * | 2020-07-07 | 2020-09-22 | 中航华东光电有限公司 | Method for uniformly heating liquid crystal screen assembly at low temperature |
| CN111781762A (en) * | 2020-08-04 | 2020-10-16 | 中航华东光电有限公司 | Method for uniformly heating round liquid crystal screen assembly at low temperature |
| CN111781762B (en) * | 2020-08-04 | 2022-10-18 | 中航华东光电有限公司 | Method for uniformly heating circular liquid crystal screen assembly at low temperature |
| CN113455860A (en) * | 2021-07-16 | 2021-10-01 | 上海通用富士冷机有限公司 | Be applied to cabinet door and cold-stored showcase of low energy consumption high definition cold-stored showcase |
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Address after: 241000 Huaxia science and Technology Park, hi tech Development Zone, Yijiang District, Wuhu, Anhui Applicant after: Avic Huadong Photoelectric Co., Ltd. Address before: 230001 Huaxia science and Technology Park, hi tech Development Zone, Yijiang District, Wuhu, Anhui Applicant before: Avic Huadong Photoelectric Co., Ltd. |
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Application publication date: 20140226 |