CN111694181B - Method for uniformly heating liquid crystal screen assembly at low temperature - Google Patents
Method for uniformly heating liquid crystal screen assembly at low temperature Download PDFInfo
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- CN111694181B CN111694181B CN202010644922.1A CN202010644922A CN111694181B CN 111694181 B CN111694181 B CN 111694181B CN 202010644922 A CN202010644922 A CN 202010644922A CN 111694181 B CN111694181 B CN 111694181B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 title abstract description 25
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a method for uniformly heating a liquid crystal display screen assembly at a low temperature, which comprises the following steps: dividing the sheet resistance of the heater into nine 3 × 3 regions A, B, C, D, E, F, G, H, I, wherein A, B, C is connected in series every three regions, D, E, F is connected in series every three regions, and G, H, I is connected in series every three regions; meanwhile, the A, B, C integral area, the D, E, F integral area and the G, H, I integral area are connected in parallel; regions B and H have a thickness greater than the thickness of region A, C, G, I, region A, C, G, I has a thickness greater than the thickness of region E, which is greater than the thicknesses of regions D and F; meanwhile, the resistance values of the A, B, C overall region and the G, H, I overall region are smaller than the resistance value of the D, E, F overall region. The liquid crystal screen assembly method for low-temperature uniform heating improves the current situation that the corners of the liquid crystal screen heated at low temperature are bluish or whitish, improves the display effect and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display assembly method for low-temperature uniform heating.
Background
The airborne liquid crystal display module needs to work in severe and complex environments such as high and low temperature, vibration and the like, so that the liquid crystal screen needs to be reinforced, and the adaptability of the airborne liquid crystal display module in the complex environment is improved. When the temperature of the liquid crystal display is below minus 20 ℃, the liquid crystal viscosity is increased due to too low temperature, the electro-optic effect is weakened, and the phenomena of reduced brightness, light picture color, trailing of dynamic picture switching and the like of the liquid crystal display are concretely shown. The requirement on the ambient temperature of the liquid crystal screen in the field of airborne display is high, the low-temperature working environment of the liquid crystal screen can be as low as minus 45 ℃, and liquid crystal molecules are almost solidified at the position and are light-proof. In order to enable the liquid crystal display to still meet the requirement of a normal display function in a low-temperature environment, the liquid crystal screen needs to be actively heated so as to enable the temperature of the liquid crystal display to rise to a normal working range, and the purpose of using the liquid crystal display in a short time is achieved.
According to the appearance structure of the liquid crystal screen, the conventional display module mostly adopts a rectangular or square heater and adopts a pair of parallel electrodes for control, so as to obtain a relatively ideal heating effect. In actual operation, because the heat dissipation of the structural member and the heat convection of the edge will cause the temperature at the center to be higher than that at the edge, the temperature distribution at the edge is also uneven, and the temperature at the middle position of the edge is higher than that at the corner, a heater with the edge temperature higher than that at the center needs to be designed to solve the problem.
Disclosure of Invention
The invention aims to provide a liquid crystal screen assembly method for uniformly heating at a low temperature, which improves the current situation that the corners of a liquid crystal screen heated at a low temperature are blued or whitish, improves the display effect and prolongs the service life.
In order to achieve the above object, the present invention provides a method for uniformly heating a liquid crystal panel assembly at a low temperature, comprising: dividing the sheet resistance of the heater into nine 3 × 3 regions A, B, C, D, E, F, G, H, I, wherein A, B, C is connected in series every three regions, D, E, F is connected in series every three regions, and G, H, I is connected in series every three regions; meanwhile, the A, B, C integral area, the D, E, F integral area and the G, H, I integral area are connected in parallel;
regions B and H have a thickness greater than the thickness of region A, C, G, I, region A, C, G, I has a thickness greater than the thickness of region E, which is greater than the thicknesses of regions D and F; meanwhile, the resistance values of the A, B, C overall region and the G, H, I overall region are smaller than the resistance value of the D, E, F overall region.
Preferably, the sheet resistance of the heater is divided into a plurality of small regions on average, wherein region a is composed of 3 × 3 small regions, region B is composed of 4 × 3 small regions, and region C is composed of 3 × 3 small regions.
Preferably, the region D is composed of 3 × 4 small regions, the region E is composed of 4 × 4 small regions, and the region F is composed of 3 × 4 small regions.
Preferably, the region G is composed of 3 × 3 small regions, the region H is composed of 4 × 3 small regions, and the region I is composed of 3 × 3 small regions.
Preferably, the plurality of small regions are all rectangles, and the length and the width of each rectangle are equal.
According to the technical scheme, the invention provides a heating technology for uniform heating, a dividing mode of multiple zones of the surface resistor and a thickness distribution mode of the surface resistor, namely, the heater of the liquid crystal screen assembly adopts the division of the multiple zones and the change of the thickness of each rectangle, and better heating uniformity can be realized by changing the resistance value so as to meet the requirement of a special display low-temperature environment, and the heating technology has a reference meaning on the heating design of an airborne liquid crystal display module.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a heater with poor heating uniformity;
FIG. 2 is a multi-zone division view of a heater in the method for uniformly heating a liquid crystal panel assembly at a low temperature according to the present invention;
FIG. 3 is a graph of the thickness profile of each zone in a multi-zone partition of the heater of the present invention;
FIG. 4 is a resistance equivalent diagram of a heater surface resistance circuit according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional words "inside, outside" and the like included in a term merely represent the orientation of the term in a conventional use state or a colloquial meaning understood by those skilled in the art, and should not be construed as limiting the term.
The invention provides a method for uniformly heating a liquid crystal display screen assembly at a low temperature, which comprises the following steps: dividing the sheet resistance of the heater into nine 3 × 3 regions A, B, C, D, E, F, G, H, I, wherein A, B, C is connected in series every three regions, D, E, F is connected in series every three regions, and G, H, I is connected in series every three regions; meanwhile, the A, B, C integral area, the D, E, F integral area and the G, H, I integral area are connected in parallel;
regions B and H have a thickness greater than the thickness of region A, C, G, I, region A, C, G, I has a thickness greater than the thickness of region E, which is greater than the thicknesses of regions D and F; meanwhile, the resistances of the A, B, C global region and the G, H, I global region are smaller than the D, E, F global region.
Specifically, the sheet resistance of the heater is divided into a plurality of small regions on average, wherein region a is composed of 3 × 3 small regions, region B is composed of 4 × 3 small regions, and region C is composed of 3 × 3 small regions.
Region D is composed of 3 × 4 small regions, region E is composed of 4 × 4 small regions, and region F is composed of 3 × 4 small regions.
Region G is composed of 3 × 3 small regions, region H is composed of 4 × 3 small regions, and region I is composed of 3 × 3 small regions.
The small areas are all rectangular, and the length and the width of each rectangle are equal.
As shown in fig. 1, which is a schematic cross-sectional view of a heater with less than uniform heating. In the figure, 1 denotes a heater glass, typically a soda lime float glass; point 2 represents a heating material ITO (indium tin oxide) coated on the heater glass; and 3, a heating electrode strip is represented, and the material is silver paste or copper generally.
Each rectangle in the multi-zone division diagram of the heater of fig. 2 is equal in length and width, a denotes the 9 rectangular zones associated with the circle, and so on for the remaining zones. According to the formula
Where ρ represents resistivity and D represents thickness, it can be seen from the formula that the sheet resistance can be changed by changing the thickness of each rectangleThe larger the D is, the smaller the resistance value is, and the heating power consumption with small resistance value is increased. The square resistance of the heater can be divided into nine areas ABCDEFGHI integrally, every three areas ABC, DEF and GHI are in a series structure, and the three areas ABC, DEF and GHI are in a parallel structure. The thickness of the rectangle in each area is adjusted to achieve the purpose of uniform heating, and the more the divided rectangular areas are, the better the heating effect is.
Fig. 3 is a thickness distribution diagram for each region. The thickness of the BH region > the thickness of the ACGI region > the thickness of the E region > the thickness of the DF region, and in order to achieve uniform heating, the resistances of the ABC whole region and the GHI whole region must be smaller than the resistance of the DEF whole region.
Fig. 4 is a resistance equivalent diagram of a heater surface resistance circuit. The heater is divided into a plurality of zones, each rectangle has a certain resistance value, and in the series connection structure, the area resistance of the rectangle from two ends to the middle is gradually reduced. In the parallel structure, the resistance value is gradually increased from the edge to the middle. From the fact that P ^ U ^2/RS and S represent the area, the heating power consumption density of the edge area is higher than that of the central area, and the temperature rise is higher as the heating power consumption density is higher.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (5)
1. A method for assembling a liquid crystal screen heated uniformly at low temperature is characterized by comprising the following steps: dividing the square resistor of the heater into nine areas A, B, C, D, E, F, G, H and I of 3 multiplied by 3, wherein A, B and C are sequentially positioned in a first row of the 3 multiplied by 3 array, D, E, F are sequentially positioned in a second row of the 3 multiplied by 3 array, and G, H, I is sequentially positioned in a third row of the 3 multiplied by 3 array; wherein A, B, C are connected in series in every three zones, D, E, F are connected in series in every three zones, G, H, I are connected in series in every three zones; meanwhile, the A, B, C overall region, the D, E, F overall region and the G, H, I overall region are connected in parallel;
regions B and H have a thickness greater than the thickness of region A, C, G, I, region A, C, G, I has a thickness greater than the thickness of region E, which is greater than the thicknesses of regions D and F; meanwhile, the resistance values of the A, B, C overall region and the G, H, I overall region are smaller than the resistance value of the D, E, F overall region.
2. The method of assembling a liquid crystal panel of claim 1, wherein the sheet resistance of the heater is divided into a plurality of small areas on average, wherein area a is composed of 3 x 3 small areas, area B is composed of 4 x 3 small areas, and area C is composed of 3 x 3 small areas.
3. The method of assembling a liquid crystal panel of claim 2, wherein the area D is composed of 3 x 4 small areas, the area E is composed of 4 x 4 small areas, and the area F is composed of 3 x 4 small areas.
4. The method of assembling a liquid crystal panel of claim 2, wherein the region G is composed of 3 x 3 small regions, the region H is composed of 4 x 3 small regions, and the region I is composed of 3 x 3 small regions.
5. The method of claim 2, wherein the plurality of small areas are rectangular and each of the rectangles has the same length and width.
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| CN202010644922.1A CN111694181B (en) | 2020-07-07 | 2020-07-07 | Method for uniformly heating liquid crystal screen assembly at low temperature |
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| CN202010644922.1A CN111694181B (en) | 2020-07-07 | 2020-07-07 | Method for uniformly heating liquid crystal screen assembly at low temperature |
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| CN111694181B true CN111694181B (en) | 2022-06-21 |
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| CN119002112A (en) * | 2024-10-22 | 2024-11-22 | 惠科股份有限公司 | Liquid crystal display panel and electronic equipment |
Citations (1)
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|---|---|---|---|---|
| JP2005116244A (en) * | 2003-10-06 | 2005-04-28 | Dainippon Printing Co Ltd | Surface heater and its manufacturing method |
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| KR100850440B1 (en) * | 2007-03-12 | 2008-08-07 | (주)머시인앤드시스템인테그레이션코리아 | Lcd substrate heater |
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| KR20130102577A (en) * | 2010-09-03 | 2013-09-17 | 텔 쏠라 아게 | Substrate heating device |
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| JP2005116244A (en) * | 2003-10-06 | 2005-04-28 | Dainippon Printing Co Ltd | Surface heater and its manufacturing method |
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