CN212781569U

CN212781569U - Liquid crystal display device having a plurality of pixel electrodes

Info

Publication number: CN212781569U
Application number: CN202021430482.1U
Authority: CN
Inventors: 赵昭行; 金相镇; 刘正平; 何燕飞
Original assignee: Chenmei Xiamen Photoelectric Co ltd
Current assignee: Hongtong Technology Xiamen Co ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-03-23
Anticipated expiration: 2030-07-20

Abstract

A liquid crystal display device comprises a display module, a functional layer and a heating module. The display module is provided with a display surface. The functional layer is arranged on one side of the display module facing the display surface. The heating module is arranged on the display module. The utility model discloses a liquid crystal display device can solve the sluggish phenomenon of liquid crystal that the low temperature environment caused.

Description

Liquid crystal display device having a plurality of pixel electrodes

Technical Field

The present invention relates to an electronic device, and more particularly to a liquid crystal display device capable of avoiding ghost shadow or slow frame problem.

Background

With the progress of technology, flat panel display devices have been widely used in various fields, especially liquid crystal display devices, and have superior characteristics of light weight, low power consumption and no radiation, so that they have gradually replaced the conventional cathode ray tube display devices and are applied to various electronic products, such as mobile phones, portable multimedia devices, notebook computers, liquid crystal televisions and liquid crystal display screens.

Compared with the room temperature or warm environment, the liquid crystal display device has a retardation phenomenon in the liquid crystal molecules in the low temperature environment (e.g. below zero degrees celsius), so that the Response time (Response time) of the liquid crystal molecules is several times slower than that in the normal temperature, and the problems of ghost shadow or slow grid are caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a liquid crystal display device, which can solve the liquid crystal retardation caused by low temperature environment and further avoid the problems of image sticking or slow motion.

To achieve the above objective, the present invention provides a liquid crystal display device, which includes a display module, a functional layer and a heating module. The display module is provided with a display surface. The functional layer is arranged on one side or one side of the display module facing the display surface. The heating module is arranged on the display module.

In one embodiment, the functional layer is an antiglare film, a scratch-resistant film, a fingerprint-resistant film, a water-and stain-resistant film, or an explosion-proof film.

In one embodiment, the heating module includes a substrate having a first surface and a second surface opposite to the first surface, and a heating layer disposed on the first surface and/or the second surface of the substrate.

In one embodiment, the area resistance of the heating layer is greater than 0 and less than or equal to 30 ohms per unit area (30 ohms/sq.).

In one embodiment, the material of the heating layer includes a silver nanowire, indium tin oxide, indium zinc oxide, a metal mesh, a carbon nanotube, graphene, or a conductive metal film.

In an embodiment, the heating module further includes two electrodes disposed on two opposite sides of the substrate and electrically connected to the heating layer.

In one embodiment, the heating module is disposed between the functional layer and the display module.

In one embodiment, the liquid crystal display device further includes a touch panel disposed between the functional layer and the heating module.

In one embodiment, the liquid crystal display device further includes a protective cover disposed between the functional layer and the touch panel.

In one embodiment, the liquid crystal display device further includes a first adhesive layer disposed between the touch panel and the heating module, and a second adhesive layer disposed between the heating module and the display module.

In an embodiment, the liquid crystal display device further includes a touch pattern layer, the heating module includes a substrate and a heating layer, the substrate has two opposite surfaces, the touch pattern layer is disposed on one of the two surfaces of the substrate, and the heating layer is disposed on the other of the two surfaces of the substrate.

In one embodiment, the liquid crystal display device further includes a protective cover disposed between the functional layer and the touch pattern layer.

In one embodiment, the display module comprises a display panel and a backlight unit, and the heating module is arranged between the display panel and the backlight unit; or the heating module is arranged on one side or one surface of the backlight unit opposite to the display panel

In one embodiment, the liquid crystal display device further includes a touch panel disposed between the functional layer and the display panel.

In one embodiment, the heating module is disposed on a side or a surface of the display module opposite to the display surface.

Bearing, the utility model discloses a liquid crystal display device is under low temperature environment, and the heating module can produce heat energy and conduct to the liquid crystal molecule of display module assembly (or display panel) in the short time to make display module assembly (or display panel) can heat up to normal operating temperature (for example 25 or 30 ℃, or above) in the short time, liquid crystal hysteresis when consequently can avoiding the low temperature, and then avoid taking place ghost or slow check scheduling problem.

Drawings

Fig. 1A is a schematic diagram of a liquid crystal display device according to an embodiment of the present invention.

FIG. 1B is a schematic sectional view of the heating module of the liquid crystal display device of FIG. 1A taken along the A-A section line.

Fig. 2, fig. 3A, fig. 4 and fig. 5 are schematic diagrams of liquid crystal display devices according to different embodiments of the present invention.

FIG. 3B is a schematic sectional view of the heating module of the LCD device of FIG. 3A along a section line B-B.

Reference symbol of element:

1,1a,1b,1c,1d liquid crystal display device

11 display module

111 display panel

112 backlight unit

12 functional layer

13 heating module

131 base plate

132 heating layer

14 touch panel

15 protective cover plate

16a first adhesive layer

16b second adhesive layer

17 touch pattern layer

A-A, B-B is a cut line

D, display surface

E1, E2 electrodes

S1 first surface

S2 second surface

Detailed Description

Hereinafter, a liquid crystal display device according to some embodiments of the present invention will be described with reference to the accompanying drawings, in which like elements are described with like reference numerals.

The liquid crystal display device of the present invention is not limited to, for example, a Fringe Field Switching (FFS) type, a horizontal Switching (IPS) type, a Twisted Nematic (TN) type, or a Vertical Alignment (VA) type liquid crystal display device, or other types of liquid crystal display devices, and is not limited thereto.

Fig. 1A is a schematic diagram of a liquid crystal display device according to an embodiment of the present invention, and fig. 1B is a schematic cross-sectional diagram of a heating module of the liquid crystal display device of fig. 1A along a-a section line.

Referring to fig. 1A, the lcd device 1 includes a Display Module (Display Module)11, a Functional Layer (Functional Layer)12, and a Heating Module (Heating Module) 13. In addition, the liquid crystal display device 1 of the present embodiment further includes a touch panel 14, a protective cover 15, a first adhesive layer 16a and a second adhesive layer 16 b.

The display module 11 has a display surface D, and the functional layer 12 is disposed on one side or one side of the display module 11 facing the display surface D. Herein, the display surface D can be used for displaying images, and the functional layer 12 is disposed on the display module 11 and opposite to the display surface D. The display module 11 is a liquid crystal display module (LCM) including liquid crystal molecules, and the functional layer 12 is a light-transmitting Film layer, such as but not limited to an Anti-glare Film (Anti-glare Film), a scratch-resistant Film (Anti-scratch Film), a fingerprint-resistant Film (Anti-fingerprint Film), a waterproof Anti-fouling Film, or an explosion-proof Film (Anti-scatter Film), and is not limited thereto.

The heating module 13 is disposed on the display module 11. The heating module 13 is used to heat the display module 11, so that the temperature of (liquid crystal molecules of) the display module 11 can be raised. The heating module 13 of the present embodiment is disposed between the functional layer 12 and the display module 11. As shown in fig. 1B, the heating module 13 may include a substrate 131 and a heating layer 132, the substrate 131 has a first surface S1 and a second surface S2 opposite to the first surface S1, and the heating layer 132 may be disposed on the first surface S1 and/or the second surface S2 of the substrate 131. Here, the first surface S1 faces the functional layer 12, and the second surface S2 faces the display module 11. The heating layer 132 of the present embodiment is exemplified by the first surface S1 provided on the substrate 131. The substrate 131 is a transparent insulating substrate, such as but not limited to a glass substrate or a Polyimide (PI) substrate. The heating layer 132 is transparent to light and includes a resistive material that generates heat when energized. The resistive material may include Nano Silver Wire (SNW), Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), metal mesh (metal mesh), Carbon Nanotube (CNT), Graphene (Graphene), or Conductive metal film (Conductive metal film), or other resistive material, or a combination thereof.

In some embodiments, the surface resistance (Sheets resistance) of the heating layer 132 may be greater than 0, less than or equal to 30 ohms per unit area (i.e., 0< surface resistance ≦ 30 ohms/sq.), such as, but not limited to, 5.2, 8, 10, 17, 20, 22, 28.5 ohms/sq. Particularly, in the above resistance material, the conductive metal thin film has excellent conductivity, heat resistance and durability, and thus can be manufactured into the heating layer 132 with a lower resistance value, thereby further improving the heating efficiency, and being more suitable for being used as a material of the heating layer 132.

In addition, the heating module 13 of the present embodiment further includes two electrodes E1 and E2, wherein the electrodes E1 and E2 are disposed on the first surface S1 of the substrate 131, are located on two opposite sides of the first surface S1, and are electrically connected to the heating layer 132. Here, the material of the electrodes E1, E2 may be, for example, but not limited to, copper or silver, or a combination thereof. The electrodes E1, E2 can be formed on the substrate 131 by, for example, coating, printing (including embossing), stamping, or pad printing, and are respectively located at two opposite sides of the heating layer 132. Therefore, when a voltage difference is applied to the two electrodes E1 and E2, the resistive material of the heating layer 132 generates heat energy, and the heat energy is conducted to the display module 11 to heat the liquid crystal molecules of the display module 11, so that the liquid crystal molecules can be heated to the normal operating temperature within a short time (e.g., 2 to 5 minutes), thereby avoiding the retardation of the liquid crystal molecules at low temperature.

Referring to fig. 1A again, the touch panel 14 is disposed between the functional layer 12 and the heating module 13. Here, the touch panel 14 is disposed on the display module 11 and located between the functional layer 12 and the heating module 13. In some embodiments, the touch panel 14 may have a substrate and a touch pattern layer disposed on the substrate. The touch pattern layer may form a touch sensing circuit (i.e., the driving electrode Tx and the sensing electrode Rx), and the touch pattern layer may be used to sense a touch position of a user, so that the liquid crystal display device 1 is an out-cell (out-cell) touch display device.

The protective cover 15 may be a transparent protective glass, such as but not limited to a transparent glass, and is disposed between the functional layer 12 and the touch panel 14. Here, the functional layer 12 is disposed on the surface of the protective cover 15 away from the touch panel 14. The protective cover 15 can protect the touch panel 14, the heating module 13 and the display module 11 from the intrusion of foreign matters or moisture.

The first adhesive layer 16a is disposed between the touch panel 14 and the heating module 13 to bond the touch panel 14 and the heating module 13 together, and the second adhesive layer 16b is disposed between the heating module 13 and the display module 11 to bond the heating module 13 and the display module 11 together. The first Adhesive layer 16a or the second Adhesive layer 16b can be, for example but not limited to, an Optical Clear Adhesive (OCA) or an Optical Clear Resin (OCR), or include other light-transmissive Adhesive materials.

In the liquid crystal display device 1 of the present embodiment, the functional layer 12 is disposed on one side or one surface of the display module 11 facing the display surface D, and the heating module 13 is disposed between the display module 11 and the functional layer 12. Therefore, in a low temperature environment, the voltage difference can be applied to the two electrodes E1 and E2 of the heating module 13, so that the heating layer 132 of the heating module 13 can generate heat energy and conduct the heat energy to the display module 11, and the display module 11 can be heated to a normal operating temperature (e.g., 25 ℃ or 30 ℃ or above) in a short time, thereby avoiding the retardation of liquid crystal molecules at a low temperature, and further avoiding the occurrence of image sticking or slow movement.

In an example of a heating module 13 of up to 10.25 inches (L257 × W105 mm), the heating layer 132 is made of SNW, for example, and has an area resistance of 20ohm/sq, for example, when a voltage difference of 19V is applied, the temperature rises by 9.4 ℃ after 15 seconds, by 36.4 ℃ after 3 minutes, and by 36.1 ℃ after 10 minutes. In another heating test of a 10.25 inch (L257 × W105 mm) heating module 13, the material of the heating layer 132 is, for example, a metal mesh with a sheet resistance of 10 ohm/sq, for example, when the input voltage difference is, for example, 7V, the temperature may rise by 30 ℃ after 210 seconds; when the input voltage difference is 12V, the temperature can rise by 50 ℃ after 210 seconds, so it can be proved that the heating layer 132 of the heating module 13 of the present invention can generate heat energy rapidly, thereby heating the display module 11, making the liquid crystal molecules raise to the temperature capable of operating normally in a short time and avoiding the liquid crystal retardation phenomenon at low temperature.

Fig. 2, fig. 3A, fig. 4 and fig. 5 are schematic diagrams of a liquid crystal display device according to different embodiments of the present invention, respectively, and fig. 3B is a schematic cross-sectional view of a heating module of the liquid crystal display device of fig. 3A along a B-B section line.

As shown in fig. 2, the liquid crystal display device 1a of the present embodiment is substantially the same as the liquid crystal display device 1 of the previous embodiment in terms of the element composition and the connection relationship of the elements. The difference is that the liquid crystal display device 1a of the present embodiment does not have the protective cover 15, but uses (the substrate of) the touch panel 14 as the protective cover, so that the liquid crystal display device 1a is a single Glass (OGS) touch display device. Therefore, the functional layer 12 of the present embodiment can be disposed on the surface of the touch panel 14 away from the heating module 13, and the touch pattern layer of the touch panel 14 can face the heating module 13.

As shown in fig. 3A and 3B, the liquid crystal display device 1B of the present embodiment has substantially the same element composition and connection relationship between the elements as the liquid crystal display device 1 of the previous embodiment. The difference is that the liquid crystal display device 1b of the present embodiment does not have the touch panel 14, but includes a touch pattern layer 17. As shown in fig. 3B, the heating module 13 includes a substrate 131 and a heating layer 132, the substrate 131 has a first surface S1 and a second surface S2 opposite to each other, the first surface S1 faces the protective substrate 15, the second surface S2 faces the display module 11, the touch pattern layer 17 is disposed on the first surface S1 of the substrate 131, so that the protective cover 15 can be located between the functional layer 12 and the touch pattern layer 17, and the heating layer 132 and the electrodes E1 and E2 are disposed on the second surface S2 of the substrate 131. In various embodiments, the touch pattern layer 17 may also be disposed on the second surface S2 of the substrate 131, and the heating layer 132 and the electrodes E1 and E2 are disposed on the first surface S1 of the substrate 131, which is not limited by the invention.

As shown in fig. 4, the liquid crystal display device 1c of the present embodiment has substantially the same element composition and connection relationship between the elements as the liquid crystal display device 1 of the previous embodiment. The difference is that the liquid crystal display device 1c of the present embodiment does not include the first adhesive layer 16a and the second adhesive layer 16b, and the heating module 13 is not disposed between the functional layer 12 and the display module 11, but is disposed inside the display module 11. The display module 11 of the present embodiment may include a display panel 111 and a backlight unit 112, wherein the backlight unit 112 may emit light to the display panel 111, so that the display panel 111 may display an image. In addition, the touch panel 14 is disposed between the functional layer 12 (protective cover 15) and the display panel 111, the protective cover 15 is disposed between the functional layer 12 and the touch panel 14, and the heating module 13 is disposed between the display panel 111 and the backlight unit 112. The heating module 13 is disposed between the display panel 111 and the backlight unit 112, and can also heat the liquid crystal molecules of the display panel 111 to avoid the liquid crystal retardation at low temperature.

As shown in fig. 5, the liquid crystal display device 1d of the present embodiment is substantially the same as the liquid crystal display device 1c of the previous embodiment in terms of the element composition and the connection relationship between the elements. The difference is that the liquid crystal display device 1d of the present embodiment does not have the protective cover 15, but uses (the substrate of) the touch panel 14 as the protective cover, so that the liquid crystal display device 1a is a single glass On Glass (OGS) touch display device.

Further, other technical features of the liquid crystal display devices 1a to 1d may refer to the same elements of the liquid crystal display device 1, and will not be described herein.

In addition, compared to the case where the heating module 13 is disposed inside the display module 11, the heating module 13 may be disposed on a side or a surface of the backlight unit 112 opposite to the display panel, and may also function to heat the liquid crystal molecules of the display panel 111, and the illustration is not drawn.

In summary, in the liquid crystal display device of the present invention, the functional layer is disposed on one side or one side of the display module facing the display surface, and the heating module is disposed on the display module, in some embodiments, the heating module may be disposed between the functional layer and the display module; in other embodiments, the heating module may be disposed between the display panel and the backlight unit of the display module. Therefore, in a low temperature environment, the heating module can be used to generate heat energy in a short time and conduct the heat energy to the liquid crystal molecules of the display module (or the display panel), so that the display module (or the display panel) can be heated to a normal operating temperature (for example, 25 ℃ or 30 ℃ or above) in a short time, thereby avoiding the liquid crystal retardation phenomenon at a low temperature and further avoiding the problems of ghost shadow, slow speed and the like.

The foregoing is by way of example only, and not limiting. It is intended that all equivalent modifications and variations not departing from the spirit and scope of the present invention be included in the following claims.

Claims

1. A liquid crystal display device, comprising:

a display module having a display surface;

the functional layer is arranged on one side of the display module facing the display surface; and

and the heating module is arranged on the display module.

2. The liquid crystal display device according to claim 1, wherein the functional layer is an antiglare film, a scratch-resistant film, a fingerprint-resistant film, a water-and stain-resistant film, or an explosion-proof film.

3. The liquid crystal display device of claim 1, wherein the heating module comprises a substrate and a heating layer, the substrate has a first surface and a second surface opposite to the first surface, and the heating layer is disposed on the first surface and/or the second surface of the substrate.

4. The liquid crystal display device of claim 3, wherein a surface resistance value of the heating layer is greater than 0, less than or equal to 30 ohms per unit area.

5. The liquid crystal display device of claim 3, wherein a material of the heating layer includes a silver nanowire, an indium tin oxide, an indium zinc oxide, a metal mesh, a carbon nanotube, graphene, or a conductive metal thin film.

6. The liquid crystal display device of claim 3, wherein the heating module further comprises two electrodes disposed on two opposite sides of the substrate and electrically connected to the heating layer.

7. The liquid crystal display device of claim 1, wherein the heating module is disposed between the functional layer and the display module.

8. The liquid crystal display device of claim 7, further comprising:

and the touch panel is arranged between the functional layer and the heating module.

9. The liquid crystal display device of claim 8, further comprising:

and the protective cover plate is arranged between the functional layer and the touch panel.

10. The liquid crystal display device of claim 8 or 9, further comprising:

the touch panel comprises a touch panel, a heating module, a first adhesion layer and a second adhesion layer, wherein the first adhesion layer is arranged between the touch panel and the heating module, and the second adhesion layer is arranged between the heating module and the display module.

11. The liquid crystal display device of claim 7, further comprising:

the heating module comprises a substrate and a heating layer, the substrate is provided with two opposite surfaces, the touch pattern layer is arranged on one of the two surfaces of the substrate, and the heating layer is arranged on the other one of the two surfaces of the substrate.

12. The liquid crystal display device of claim 11, further comprising:

and the protective cover plate is arranged between the functional layer and the touch pattern layer.

13. The liquid crystal display device of claim 1, wherein the display module comprises a display panel and a backlight unit, the heating module is disposed between the display panel and the backlight unit; or the heating module is arranged on one side of the backlight unit, which faces away from the display panel.

14. The liquid crystal display device of claim 13, further comprising:

and the touch panel is arranged between the functional layer and the display panel.

15. The liquid crystal display device of claim 14, further comprising:

16. The liquid crystal display device as claimed in claim 1, wherein the heating module is disposed on a side of the display module opposite to the display surface.