CN210835501U - Heating plate for heating liquid crystal display - Google Patents

Abstract

The utility model relates to the technical field of liquid crystal displays, in particular to a heating plate for heating a liquid crystal display, which comprises a transparent substrate and a transparent heating wire layer arranged on one surface of the transparent substrate; the transparent heating wire layer is etched with a plurality of heating wires with different thicknesses and/or different arrangement densities, the heating wires are arranged along the same direction, and two ends of each heating wire are connected with heating electrodes. After control circuit control heating electrode switched on, the heater strip produced heat and heated the display screen, in this embodiment after etching out many heater strips on the zone of heating, every heater strip is equivalent to a resistance wire, consequently this heater strip layer is equivalent to by original whole resistance become the parallelly connected form of a plurality of resistances, because the total resistance of parallelly connected resistance all is little than the resistance of any resistance, consequently according to the resistance principle of generating heat, all resistances total amount of generating heat are greater than the whole conducting layer among the prior art, improved heating efficiency.

Description

Heating plate for heating liquid crystal display

Technical Field

The utility model relates to a LCD technical field, concretely relates to a hot plate for heating LCD.

Background

Liquid crystal displays are widely used because of their advantages of low power consumption, passive display, easy driving, no harmful rays, and the like. The liquid crystal material is characterized in that when the liquid crystal material is in a critical state or exceeds the crystallization point of the liquid crystal material, the response of liquid crystal molecules is slowed or cannot be responded, so that a liquid crystal display cannot work normally, and the demand of liquid crystal products meeting high requirements of low-temperature (generally-50 to-30 ℃) work is increasing.

The prior art solution is to add an auxiliary heating glass to a common liquid crystal display, as shown in fig. 1, the heating glass in the prior art includes an upper glass layer 11 and a lower glass layer 11, and a heating layer 12 disposed between the upper glass layer and the lower glass layer 11, where the heating layer 12 is equivalent to a square resistor, and conductive electrodes 13 are disposed at two ends of the heating layer for applying voltage to the square resistor for heating. The heating function is started when the temperature is lower than a certain critical value, and the heating is stopped when the temperature reaches the normal working temperature range of the liquid crystal display.

In the above scheme, the heating glass can be used as a square resistor, and the difficulty of the scheme is that the heating efficiency of the heating glass can be adjusted by adjusting the resistance value of the square resistor, and the smaller the resistance value of the square resistor is, the higher the heating efficiency is, sometimes even the resistance value of each square resistor needs to be controlled to be 3-4 Ω, and the heating efficiency can meet the requirement, but the requirement on the production process of the heating glass is too strict, the minimum square resistor (i.e. a conducting layer) can be 5-6 Ω at present in the prior art, and the bottleneck is met, and the small resistance value of the square resistor is difficult to achieve, so the requirement on the heating efficiency cannot be met by adopting the scheme.

In addition, when the scheme is adopted to heat the display screen, the conducting layer is generally thicker in thickness for improving the heating efficiency, the general thickness is about 3mm, the uniformity of the thickness of the conducting layer needs to be ensured when the conducting layer is prepared in order to ensure the consistency of the square resistance to the heating temperature of each part of the display screen, the current production process is difficult to realize, and therefore, the heating of the current heating glass to each part of the display screen is not uniform enough.

In addition, the existing auxiliary heating glass is too thick and heavy due to large thickness, and the existing market pursues a light and thin display screen, so the display screen made of the auxiliary heating glass also does not meet the market requirement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves is that the auxiliary heating glass heating efficiency who is used for heating the display screen on the existing market is low, and this embodiment provides following technical scheme.

A heating plate for heating a liquid crystal display, the heating plate comprising a transparent substrate and a transparent heating wire layer disposed on one surface of the transparent substrate;

the transparent heating wire layer comprises a plurality of heating wires with different thicknesses and/or different arrangement densities, the heating wires are arranged along the same direction, and two ends of each heating wire are used for being connected with a heating electrode.

Wherein, along the direction of arrangement, the cross-sectional area of the heater wire near both ends of the heating electrode is smaller than the cross-sectional area of the heater wire at the middle portion.

Wherein, along the arrangement direction, the density arranged between the heating wires close to the two ends of the heating electrode is less than that arranged between the heating wires at the middle part.

The transparent heating wire is one of an ITO layer, a nano silver layer or a graphene layer.

Wherein, the transparent substrate is optical glass.

In another embodiment, the plurality of heating wires are arranged at the same density, and the cross sections of the heating wires near the two ends of the heating electrode are smaller than the cross section of the heating wire in the middle part.

In another embodiment, the cross-sectional areas of the plurality of heating wires are the same, and the density of the arrangement of the heating wires near the two ends of the heating electrode is less than that of the arrangement of the heating wires in the middle part.

In another embodiment, the cross-sectional area of the heater wires near both ends of the heating electrode is smaller than the cross-sectional area of the heater wires in the middle portion along the direction of arrangement, and the density of the arrangement of the heater wires near both ends of the heating electrode is smaller than the density of the arrangement of the heater wires in the middle portion.

The heating plate for heating a liquid crystal display according to the above embodiment includes a transparent substrate and a transparent heating wire layer disposed on one surface of the transparent substrate, the transparent heating wire layer includes a plurality of heating wires having different thicknesses and/or different arrangement densities, the plurality of heating wires are arranged along the same direction, and two ends of the heating wires are connected to heating electrodes for applying a voltage to the heating wires. The one side that will this hot plate be equipped with the heater strip when preparing the display screen contacts with the display screen, control circuit control heating electrode switches on the back, the heater strip produces the heat and heats the display screen, in this embodiment after the heater strip layer includes many heater strips, every heater strip is equivalent to a resistance wire, consequently this heater strip layer is equivalent to by original whole resistance become the parallelly connected form of a plurality of resistances, because the total resistance of parallelly connected resistance is all little than the resistance of any resistance, consequently according to the resistance principle of generating heat, the total amount of generating heat of all resistances is greater than the whole conducting layer among the prior art, heating efficiency has been improved.

Drawings

FIG. 1 is a schematic view of a prior art heated glass structure;

fig. 2 is a schematic diagram of a heating plate structure provided in an embodiment of the present application;

FIG. 3 is a schematic view of an arrangement of heating wires according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a heating plate according to an embodiment of the present disclosure;

FIG. 5 is a flow chart of a method of making a heating plate according to an embodiment of the present application;

fig. 6 is a schematic structural view of a heating plate and an electrode lead according to an embodiment of the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

In an embodiment of the present invention, a heating plate for heating a liquid crystal display is provided, the heating plate including a transparent substrate and a transparent conductive layer disposed on a surface of the transparent substrate; a plurality of heating wires with different thicknesses are etched on the transparent conducting layer, the heating wires are arranged along the same direction, and two ends of each heating wire are used for being connected with a heating electrode. The one side that will be equipped with the heater strip with this hot plate when preparing the display screen contacts with display screen 3, control circuit control heating electrode switches on the back of breaking, the heater strip produces the heat and heats the display screen, in this embodiment after many heater strips of sculpture on the conducting layer, every heater strip is equivalent to a resistance wire, consequently this conducting layer is equivalent to by the parallelly connected form of a plurality of resistances that has become of original whole resistance, because the total resistance of parallelly connected resistance is all little than the resistance of any resistance, consequently according to the resistance principle of generating heat, the total amount of generating heat of all resistances is greater than the whole conducting layer among the prior art, the efficiency of generating heat has been improved.

The first embodiment is as follows:

referring to fig. 2-4, the present embodiment provides a heating plate 2 for heating a liquid crystal display, the heating plate 2 includes a transparent substrate 20 and a transparent conductive layer 21 disposed on a surface of the transparent substrate 20. A plurality of heating wires 22 with different thicknesses are etched on the transparent conductive layer 21, the plurality of heating wires 22 are arranged along the same direction to form a transparent heating wire layer, and heating electrodes 4 are further arranged at two ends of the heating wires 22, and the heating electrodes 4 are electrically connected with the heating wires 22. When the display screen is prepared, one surface of the heating plate 2 provided with the heating wire is contacted with the display screen 3, the heating wire 22 is connected with the temperature control circuit, the heating function is started when the temperature is lower than a certain critical value through the temperature control circuit on the host machine, and the heating is stopped when the normal working temperature range of the liquid crystal display is reached. In the embodiment, each heating wire is equivalent to a resistance wire, so that the conducting layer is equivalent to a mode that an original integral resistor is changed into a plurality of resistors connected in parallel, and the total resistance of the resistors connected in parallel is smaller than the resistance of any resistor, so that the total heating amount of all resistors is far larger than that of a square resistor in the prior art according to the resistance heating principle, and the heating efficiency is improved.

The thickness of the heating wires 22 is different, which means that the resistances are different, and the heat released by the heating electrodes 4 after being energized is also different, so that when a plurality of heating wires 22 are etched, it should be determined according to which display screen the heating plate 2 needs to use and the area to which the display screen applies, for example, if a certain area needs a larger heat, the cross section of the heating wire 22 corresponding to the area is set to be relatively larger, so that the resistance of the heating wire 22 is smaller, and the heating value is larger when the same voltage is applied. On the contrary, the cross section of the heating wire 22 is set to be smaller in the area where the heating value is required to be smaller on the corresponding display screen, so that the resistance of the heating wire is relatively larger and the heating value is less, thereby ensuring that the temperatures of all areas of the display are basically consistent and the display can normally work in a low-temperature environment.

Among them, the inventor found through many experiments that, in addition to the cross-sectional area of the heating wires 22 affecting the heating efficiency and the heating uniformity, the degree of density between the heating wires 22 also affects the heating efficiency and the heating uniformity of the heating wires 22, and specifically, the heating efficiency is higher in the region where the heating wires 22 are arranged more closely. On the contrary, in the places where the heating wires 22 are sparsely arranged, the heating efficiency of the heating wires 22 is relatively lower, according to the principle, the heating wires 22 are sparsely arranged in the areas where the heating efficiency is higher than a point on the display, the heating wires 22 are densely arranged in the areas where the heating plates 2 correspond to, and the heating efficiency is lower than a point on the display, so that the heating wires 22 are sparsely arranged, the required heating effect of each area is ensured, and the heating uniformity is ensured.

In another embodiment, the plurality of heating wires are arranged in the same density, and the cross sections of the heating wires close to the two ends of the heating electrode are smaller than the cross section of the heating wire in the middle part, so that the uniformity of heating of all parts of the display screen is ensured.

In another embodiment, the cross-sectional areas of the plurality of heating wires are the same, and the arrangement density of the heating wires close to the two ends of the heating electrode is smaller than that of the heating wires in the middle part, so that the heating uniformity of each part of the display screen is ensured.

In general, as shown in fig. 6, in order to ensure the heating efficiency of the heating panel, since the electrode leads 5 are provided at both ends of each heating electrode 4, the same voltage is applied to the electrode leads 5 at both ends of each heating electrode 4, for example, the same high voltage is applied to both ends of the left heating electrode 4, the same low voltage is applied to the electrode leads 5 at both ends of the right heating electrode 4, and a current flows through the heating wire 22 to the right heating electrode 4 through the left heating electrode 4, thus forming a current loop. Here, since the electrode leads 5 are welded to both ends of the heating electrode 4, in this case, for the section of the heating electrode 4, the heating electrode 4 and the electrode leads 5 are in a parallel relationship, it can also be understood that the heating electrode 4 and the electrode leads 5 are welded together to increase the cross-sectional area of the section of the heating electrode 4, so that the resistance of the section of the heating electrode 4 is smaller than that of the heating electrode 4 in the middle section (the part where the electrode leads 5 are not welded), and therefore more heat is generated on the section of the heating electrode 4. Therefore, if the cross-sectional areas of all the heater wires 22 are the same and the arrangement pitch is uniform, the heat generation amount is larger near both end portions of the heater electrode 4 than in the middle portion.

In order to ensure that the heat generated by the heating plate 2 is uniform, specifically, the present embodiment provides a suitable heating plate 2 for most displays on the market, and the inventor found through multiple heating tests that under the condition that the cross sections of the heating wires 22 are the same and the arrangement density is the same, the heating efficiency of the heating wires 22 at the connection parts with the two ends of the heating electrode 4 is higher than that of the heating wires 22 at the middle part, so in the present embodiment, the cross sections of the heating wires 22 near the two end parts of the heating electrode 4 are smaller than that near the middle part, so that the cross section of the heating wires 22 at the middle part is larger, the resistance is smaller, and the heating efficiency is slightly higher than that of the heating wires 22 near the two end parts of the heating electrode 4, so as to ensure that the heating efficiency of the heating wires 22 at. Meanwhile, the arrangement density of the heating wires 22 near the middle part of the heating electrode 4 is greater than that of the heating wires 22 near the two end parts of the heating electrode 4, so that the number of the heating wires 22 at the middle part in a unit area is greater, and the resistance is smaller after the heating wires are connected in parallel, so that the heating efficiency is higher. By the arrangement of the heating wires 22 in the embodiment, the heating efficiency of the two end parts and the middle part of the display is basically consistent, and the heating uniformity of the display is ensured.

In other embodiments, the transparent conductive layer may also be one of a transparent nano silver layer or a transparent graphene layer.

The transparent substrate of the present embodiment is an optical glass plate.

The display adopting the heating plate 2 is tested in a lower temperature environment, so that the performance of the display is greatly optimized, and the technical problem of poor low-temperature working performance of the display is thoroughly solved. Simultaneously, the 2 total thickness of hot plate that this embodiment provided is several millimeters at a tenth, greatly reduced the whole thickness and the weight of display screen.

Example two:

referring to fig. 5, the present embodiment provides a method for manufacturing a heating plate, including:

step 201: and plating a transparent conductive layer on one surface of the transparent substrate by adopting a vacuum coating method. In this embodiment, before the transparent conductive layer 21 is plated on the transparent substrate 20, the transparent substrate 20 is cleaned and dried.

Step 202: and adopting a film with a designed etching image to carry out exposure and development treatment on the conducting layer, and printing the etching pattern on the conducting layer. Different etching images are designed according to different heating requirements of the display, and the film with the designed etching images is adopted to sequentially expose and develop the conducting layer, so that the designed etching patterns are printed on the conducting layer. In which the transparent substrate 20 is sequentially subjected to a paste application and a film hardening process before exposure.

Step 203: the conductive layer is etched according to the etching pattern so that a plurality of heating wires 22 of different thicknesses are formed on the conductive layer. Wherein, after etching a plurality of heating wires 22, the photoresist needs to be removed.

Step 204: and respectively printing conductive silver paste on two side edges of the transparent substrate 20 by adopting a screen printing technology to form a first electrode and a second electrode, wherein the first electrode and the second electrode are respectively positioned at two ends of the heating wire and are electrically connected with the heating wire. Specifically, a screen printing process is used in a cleaning workshop of thousands or higher levels, conductive silver paste is printed around a conductive surface on a transparent substrate, and a first electrode and a second electrode are formed; or a gold-plated copper foil is bound around the conductive surface of the transparent substrate by using a hot-pressing bonding machine so as to form a first electrode and a second electrode, and when the heating wire is in work, a control circuit is connected to the first electrode and the second electrode to supply power to the first electrode and the second electrode so as to control the heating wire 22 to generate heat.

In the embodiment, in order to meet the heating requirements of a large number of displays, when a film for etching an image is designed, the cross section of the etched heating wire 22 near the two end portions of the heating electrode 4 is smaller than that near the middle portion, so that the cross section of the heating wire 22 at the middle portion is large, the resistance is small, and the heating efficiency is slightly higher than that of the heating wire 22 at the two end portions of the heating electrode 4, so as to ensure that the heating efficiency of the heating wire 22 at the middle portion is the same as that of the heating wire 22 near the two end portions of the heating electrode 4. Meanwhile, the arrangement density of the heating wires 22 close to the middle part of the heating electrode 4 is made larger than that of the heating wires 22 close to the two end parts of the heating electrode 4, so that the number of the heating wires 22 at the middle part in a unit area is larger, and the resistance is smaller after the heating wires are connected in parallel, and the heating efficiency is higher. By the arrangement of the heating wires 22 in the embodiment, the heating efficiency of the two end parts and the middle part of the display is basically consistent, and the heating uniformity of the display is ensured.

In addition, the total thickness of the heating plate 2 provided by the embodiment is a few tenths of millimeters, and the whole thickness and weight of the display screen are greatly reduced.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims (8)

1. A heating plate for heating a liquid crystal display, the heating plate comprising a transparent substrate and a transparent heating wire layer disposed on a surface of the transparent substrate;

the transparent heating wire layer comprises a plurality of heating wires with different thicknesses and/or different arrangement densities, the heating wires are arranged along the same direction, and two ends of each heating wire are used for being connected with a heating electrode.

2. The heating plate as set forth in claim 1, wherein the cross-sectional area of the heating wires near both ends of the heating electrodes is smaller than that of the heating wires at the central portion in the arrangement direction.

3. The heating panel as claimed in claim 1, wherein the heating wires near both ends of the heating electrode are arranged in a density lower than that of the heating wires in the middle portion in the direction of arrangement.

4. The heating plate of claim 1, wherein the transparent heating wires are one of an ITO layer, a nano-silver layer, or a graphene layer.

5. The heating plate of claim 1, wherein the transparent substrate is optical glass.

6. The heating plate as claimed in claim 1, wherein the plurality of heating wires are arranged in the same density, and the cross-sectional area of the heating wires near both ends of the heating electrode is smaller than that of the heating wire at the central portion.

7. The heating plate as claimed in claim 1, wherein the plurality of heating wires have the same size in cross-sectional area, and the density of the arrangement of the heating wires near both ends of the heating electrode is less than that of the arrangement of the heating wires in the middle portion.

8. The heating panel as claimed in claim 1, wherein the cross-sectional area of the heater wires near both ends of the heating electrode is smaller than that of the heater wires in the middle portion in the direction of arrangement, and the density of the arrangement of the heater wires near both ends of the heating electrode is smaller than that of the arrangement of the heater wires in the middle portion.

Images