WO2019127425A1

WO2019127425A1 - Automobile and liquid crystal display apparatus

Info

Publication number: WO2019127425A1
Application number: PCT/CN2017/119987
Authority: WO
Inventors: 王世华; 张小林; 王剑锋
Original assignee: 上海碧虎网络科技有限公司
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2019-07-04

Abstract

A liquid crystal display apparatus and an automobile, relating to the field of electronic display devices. The liquid crystal display apparatus comprises: a control module, and a first transparent liquid crystal panel (1), a first transparent backlight module (2), and a light shielding apparatus (3) that are provided in sequence. The control module is connected to the light shielding apparatus (3) so as to control the light shielding apparatus (3) to switch between a transparent state and a non-transparent state. The control module is connected to the first transparent liquid crystal panel (1) so as to control the display content of the first transparent liquid crystal panel (1). The control module is connected to the first transparent backlight module (2) so as to control the light emitting state of the first transparent backlight module (2). Therefore, the contrast of a displayed image is ensured and the displaying quality is improved.

Description

Automotive and liquid crystal display device

Technical field

The present invention relates to the field of electronic display devices, and discloses a liquid crystal display device and an automobile.

Background technique

Liquid crystals are substances with flow characteristics, so it is only necessary to apply a very small force to move liquid crystal molecules. Taking the most common general nematic liquid crystal as an example, liquid crystal molecules can easily turn liquid crystal molecules by an electric field. Since the optical axis of the liquid crystal is quite consistent with its molecular axis, optical effects can be generated by this, and when applied to liquid crystals When the electric field removal disappears, the liquid crystal will regain its original state before the electric field is applied by its own elasticity and viscosity. Therefore, by utilizing this property of liquid crystal molecules, liquid crystal display devices have been manufactured.

Nowadays, more and more manufacturers are committed to developing transparent display products and improving the human-computer interaction experience. In this context, transparent liquid crystal displays have emerged.

Since the liquid crystal molecules themselves do not emit light, it is necessary to prevent the backlight of the liquid crystal panel from being blocked during display. In order to solve this technical problem, the prior art transparent liquid crystal panel adopts a light box structure, and uses the light source in the box as a backlight of the liquid crystal panel disposed on the side wall of the box. Obviously, the volume of the entire liquid crystal display device will be very large, and it can only be applied to special scenes such as display windows and building exterior walls.

Summary of the invention

The inventors of the present invention have found that in order to solve the volume problem, in the prior art, it has been attempted to convert a line light source provided on the side portion of the light guide plate into a surface light source by using a transparent light guide plate that is in close contact with the liquid crystal panel. However, since the light guide plate and the transparent liquid crystal panel are both transparent, it is impossible to prevent the light from entering the back. These rays reduce the contrast and make the display effect of the liquid crystal display device worse.

In order to solve the above technical problem, the present invention provides a liquid crystal display device comprising:

The control module and the first transparent liquid crystal panel, the first transparent backlight module and the shading device are sequentially disposed.

The control module is coupled to the shading device to control the shading device to switch between a transparent state and an opaque state.

The control module is connected to the first transparent liquid crystal panel to control display content of the first transparent liquid crystal panel.

The control module is connected to the first transparent backlight module to control the illumination state of the first transparent backlight module.

Embodiments of the present invention enable the liquid crystal display device to switch between a display state and a transparent state by controlling the light shielding device, the first transparent liquid crystal panel, and the first transparent backlight module by means of the control module. Since it is in the state of the display screen, the back light can be prevented from entering by the light shielding device, so that the contrast of the displayed screen can be secured, and the displayed image quality can be improved.

Preferably, the control module can include:

A logic switching unit is provided to control switching of the shading device.

A content display switch is provided to control whether the first transparent liquid crystal panel performs content display.

The light source driving unit is configured to control a light emitting state of the first backlight module.

The switching of the liquid crystal display device between the transparent and opaque states can be efficiently controlled by means of these units in the control module.

Preferably, the first transparent liquid crystal panel comprises:

Two display panels spaced apart from each other and a liquid crystal material disposed between the two display panels, and FET electrodes and common electrodes disposed on opposite sides of the two display panels.

The control module controls the molecular arrangement of the liquid crystal material by controlling the FET electrode and the common electrode.

The FET electrode and the common electrode are provided for the purpose of displaying a diverse picture by controlling the molecular arrangement of the liquid crystal material.

Preferably, the first transparent backlight module comprises:

a transparent light guide plate and a light source disposed on a side of the transparent light guide plate.

The light from the light source is driven into the transparent light guide plate from the side of the transparent light guide plate to form a surface light source.

An array of dots is formed on the transparent light guide plate, and the interval between adjacent dots on the dot array is less than or equal to 35 micrometers.

Compared with the prior art, when the dot array is set to have an interval of less than or equal to 35 micrometers, the light uniformity of the surface light source can be improved, and a speckled uneven display effect can be prevented.

Preferably, the light shielding device comprises a light shielding panel made of a polymer dispersed liquid crystal or a polymer network liquid crystal, and a switching electrode for controlling the transparent/opaque state of the light shielding panel, and the switching electrode is connected to the control module.

By switching the transparent and opaque state by means of the light-shielding panel, the switching of the light-shielding state can be quickly achieved.

Alternatively, the shading device includes a blocking member and a motor for controlling the blocking member to block or leave the back surface of the first transparent backlight module, and the motor is coupled to the control module.

The physical switching is performed by using the blocking member, the equipment process is mature, and the manufacturing cost is lower.

Preferably, the second transparent liquid crystal panel and the second transparent backlight module are further included.

The second transparent backlight module is located between the second transparent liquid crystal panel and the light shielding device.

When a second set of transparent liquid crystal panel and a second transparent backlight module are provided, a double-sided display can be realized, which can be applied to a wider range of scenes.

Preferably, the camera module is further connected to the second transparent liquid crystal panel.

The camera module is configured to capture an image of an area before the first transparent liquid crystal panel, and send the image to the second transparent liquid crystal panel for display.

When the camera module is provided, the combination of the camera module and the second transparent liquid crystal panel enables the viewer on the side of the second transparent liquid crystal panel to still see the opposite side of the liquid crystal display device.

Further, the present invention provides an automobile comprising the aforementioned liquid crystal display device. A transparent liquid crystal display device with higher contrast is used in the scene in the car to meet a wider range of multimedia requirements.

Therefore, preferably, when the second transparent liquid crystal panel is provided, the liquid crystal display device is disposed on the automobile and installed at a position of the rear window of the automobile.

Wherein, the second transparent liquid crystal panel faces the interior space of the automobile.

When the second transparent liquid crystal panel faces the interior space of the automobile, the occupant in the vehicle can clearly view the state outside the vehicle while the first transparent LCD panel plays the multimedia content outside the vehicle, which can improve the driver. Driving safety can also have a better ride for passengers.

Preferably, whether or not the second transparent liquid crystal panel is provided, the control module in the liquid crystal display device can be connected to the gear position control system of the automobile, and can switch the liquid crystal display device to be in a transparent state in response to the reverse state signal.

When the car is in the reverse state, switching the liquid crystal display device to a transparent state can make it easier for the driver to observe the state of the vehicle and improve safety.

Therefore, as a preferred, the control module comprises:

A logic switching unit is configured to control the shutter to switch to a transparent state in response to the reverse state signal.

The content display switch is configured to control the first transparent liquid crystal panel to output a white background in response to the reverse state signal.

The light source driving unit is configured to control the first transparent backlight module to stop emitting light in response to the reverse state signal.

The above three modules can separately control the shading device, the first transparent liquid crystal panel and the first transparent backlight module to realize fast switching of the states of the three.

Embodiments of the present invention also provide an automobile including the aforementioned liquid crystal display device.

DRAWINGS

1 is a schematic exploded view of a liquid crystal display device when a transparent protective plate is not provided in the first embodiment of the present invention;

2 is a block diagram of a module of a liquid crystal display device according to a first embodiment of the present invention;

3 is a front elevational view showing a first transparent liquid crystal panel according to a first embodiment of the present invention;

4 is a front elevational view showing a transparent light guide plate according to a first embodiment of the present invention;

5 is a schematic exploded view of a liquid crystal display device when a transparent protective plate is provided in a first embodiment of the present invention;

6 is a front elevational view showing a transparent light guide plate according to a third embodiment of the present invention;

7 is a schematic exploded view of a liquid crystal display device according to a fourth embodiment of the present invention;

Figure 8 is a side elevational view showing a liquid crystal display device of a fifth embodiment of the present invention;

Figure 9 is a schematic view showing a liquid crystal display device according to a sixth embodiment of the present invention when it is mounted on a vehicle;

Fig. 10 is a view showing a state in which a liquid crystal display device according to an eighth embodiment of the present invention is connected to a gear position control system of an automobile.

Description of the reference signs:

A-liquid crystal display device;

1-first transparent liquid crystal panel; 11-FET electrode; 12-common electrode; 13-display panel; 2-first transparent backlight module; 21-transparent light guide plate; 22-light source; 3-light-shielding device; Transparent protection board; 5--transparent protection board; 6-second transparent liquid crystal panel; 7-second transparent backlight module; 8-camera;

B-gear control system;

Detailed ways

Embodiment 1

A first embodiment of the present invention provides a liquid crystal display device, as shown in FIG. 1 and FIG. 2, including:

The control module and the first transparent liquid crystal panel 1, the first transparent backlight module 2, and the shading device 3 are sequentially disposed.

The control module is coupled to the shading device 3 to control the shading device 3 to switch between a transparent state and an opaque state.

The control module is connected to the first transparent liquid crystal panel 1 to control the display content of the first transparent liquid crystal panel 1.

The control module is connected to the first transparent backlight module 2 to control the illumination state of the first transparent backlight module 2.

Wherein, referring to FIG. 2, the control module may include:

A logic switching unit is provided to control the switching of the shading device 3.

A content display switch is provided to control whether the first transparent liquid crystal panel 1 performs content display.

The switching of the liquid crystal display device between the transparent and opaque states can be efficiently controlled by means of these units in the control module. Those skilled in the art will appreciate that these elements are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the particular application and design constraints imposed on the overall system. The skilled person will be able to implement the described functionality in a different manner for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the invention.

It is worth mentioning that the content display switch can be used only to control the opening and closing of the content display of the first transparent liquid crystal panel 1 without being directly associated with the display content of the first transparent liquid crystal panel 1. In general, data related to display content is computationally intensive, and it is also feasible to use a separate central processing unit (CPU) or graphics processing unit (GPU) to calculate image output content. The content display switch can be used to control the opening or closing of the processor, and also to open or close the channel for controlling the data flow between the processor and the first transparent liquid crystal panel 1. Furthermore, a central processing unit (CPU) or a graphics processing unit (GPU) can also be integrated into the control module.

The control module can be deployed in the liquid crystal display device in an integrated manner, in a discrete manner or in a distributed manner, and can be embedded in the first transparent liquid crystal panel 1, the first transparent backlight module 2 or even the light shielding device 3 in physical position. Independent of these three, it is not shown in Figure 1.

When the image needs to be displayed, the logic switching unit controls the light shielding device 3 to switch to the opaque state, the content display switch controls the first transparent liquid crystal panel 1 to display the content, and the light source driving unit drives the first transparent backlight module 2 to emit light. In this way, the light emitted by the first transparent backlight module 2 passes through the first transparent liquid crystal panel 1 to cause the liquid crystal display device to display an image.

When the transparency is required, the logic switching unit controls the light shielding device 3 to switch to the transparent state, the content display switch controls the first transparent liquid crystal panel 1 to output a white background, and the light source driving unit drives the first transparent backlight module 2 to stop emitting light.

In this way, since the first transparent liquid crystal panel 1, the first transparent backlight module 2, and the light shielding device 3 are all in a transparent state, the liquid crystal display device as a whole can be made transparent.

As a further preferred and refinement of some embodiments, as shown in FIG. 3, the first transparent liquid crystal panel 1 may include:

Two display panels 13 are disposed at intervals and a liquid crystal material disposed between the two display panels 13, and FET electrodes 11 and common electrodes 12 disposed on opposite sides of the two display panels 13.

The control module controls the molecular arrangement of the liquid crystal material by controlling the FET electrode 11 and the common electrode 12.

The FET electrode 11 and the common electrode 12 provided can achieve the purpose of displaying a diverse picture by controlling the molecular arrangement of the liquid crystal material.

It is obvious that the first transparent liquid crystal panel 1 may be another type of transparent liquid crystal panel, and thus the above configuration is not limited to the present invention.

In addition, in some embodiments, referring to FIG. 4 , the first transparent backlight module 2 includes a transparent light guide plate 21 and a light source 22 disposed at a side of the transparent light guide plate 21 .

The light emitted from the light source 22 is driven into the transparent light guide plate 21 from the side of the transparent light guide plate 21 to form a surface light source. The light source 22 may include a light strip formed by an array of LED lamp beads. The light guiding structure that forms the surface light source by entering the light from the side portion can significantly reduce the volume of the liquid crystal display device with respect to the light box structure of the prior art. The use of LED beads can provide greater illumination intensity with less energy consumption.

In addition, in some embodiments, the shading device 3 includes a light shielding panel made of a polymer dispersed liquid crystal or a polymer network liquid crystal, and a switching electrode for controlling the switching panel to switch the transparent/opaque state, and the switching electrode is connected to the control module.

Embodiments of the present invention enable the liquid crystal display device to switch between a display state and a transparent state by controlling the light shielding device 3, the first transparent liquid crystal panel 1, and the first transparent backlight module 2 by means of a control module. Since the back light is prevented from being incident by the light shielding device 3 when the display screen is in the state of the display screen, the contrast of the displayed screen can be secured, and the displayed image quality can be improved.

It is worth mentioning that, in the liquid crystal display device of some embodiments, the first transparent liquid crystal panel 1, the first transparent backlight module 2, and the shading device 3 are arranged at intervals, thereby realizing transparent and opaque. The liquid crystal display device is the most simplified in structure, reducing cost and complexity.

In addition, in some embodiments, as shown in FIG. 5, the liquid crystal display device may further include two transparent protection plates, respectively a front transparent protection plate 4 and a rear transparent protection plate 5, and the foregoing first transparent liquid crystal panel. 1. The first transparent backlight module 2 and the shading device 3 are disposed between the two, and are sandwiched together to form a unitary structure.

Wherein, the transparent protection plate may include a transparent panel and an external fixing frame surrounding the transparent panel. The transparent panel may be tempered glass or a hardened transparent PC material, and the external fixing frame may be made of a plastic material or a sheet metal part. The first transparent liquid crystal panel 1, the first transparent backlight module 2, and the shading device 3 can be protected by a transparent protective plate to prevent scratches, abrasion, or cracking.

Embodiment 2

A second embodiment of the present invention provides a liquid crystal display device, and the second embodiment is substantially the same as the first embodiment, and the main difference is that, in the first embodiment of the present invention, the shading device 3 includes a polymer. A light-shielding panel made of liquid crystal or polymer network liquid crystal is dispersed; however, in the second embodiment of the present invention, the light-shielding device 3 includes a blocking member and a member for controlling the blocking member to block or leave the back surface of the first transparent backlight module 2 The motor and motor are connected to the control module.

The blocking member may be a roller blind connected to the motor shaft, or a baffle plate driven by a motor or the like.

Embodiment 3

A third embodiment of the present invention provides a liquid crystal display device, and a third embodiment is an improvement of the liquid crystal display device of the first or second embodiment, which is mainly improved in the third embodiment of the present invention. As shown in FIG. 6, the transparent light guide plate 21 is formed with an array of dots, and the interval between adjacent dots on the dot array is less than or equal to 35 micrometers.

Compared with the prior art, when the dot array is set to have an interval of less than or equal to 35 micrometers, the light uniformity of the surface light source 22 can be improved, and a speckled uneven display effect can be prevented.

Embodiment 4

A fourth embodiment of the present invention provides a liquid crystal display device, and a fourth embodiment is a further improvement of the third embodiment, and a main improvement is that, in the fourth embodiment of the present invention, referring to FIG. The second transparent liquid crystal panel 6 and the second transparent backlight module 7 are also included.

The second transparent backlight module 7 is located between the second transparent liquid crystal panel 6 and the shading device 3.

When the second set of transparent liquid crystal panel and the second transparent backlight module 7 are provided, a double-sided display can be realized, which can be applied to a wider range of scenes.

The second transparent backlight module 7 and the second transparent liquid crystal panel 6 can also be controlled by the control module. More specifically, the first transparent backlight module 2 and the second transparent backlight module 7 can be synchronously driven by the existing content display switch in the control module, and synchronously by the existing light source driving unit in the control module. The first transparent liquid crystal panel 1 and the second transparent liquid crystal panel 6 are driven to realize the same opening and closing of the two display screens of the liquid crystal display device.

Of course, it is also possible to separately control the display of the two sides by independently setting two content display switches and two light source driving units.

Embodiment 5

A fifth embodiment of the present invention provides a liquid crystal display device, and a fifth embodiment is a further improvement of the fourth embodiment, and a main improvement is that, in the fifth embodiment of the present invention, referring to FIG. Also included is a camera module connected to the second transparent liquid crystal panel 6.

The camera module is configured to capture an image of an area before the first transparent liquid crystal panel 1 and send it to the second transparent liquid crystal panel 6 for display.

The camera module may include one or more cameras 8 , and the camera 8 may be disposed at any position on the edge of the first transparent liquid crystal panel 1 , preferably disposed above the middle portion.

When the camera module is provided, the combination of the camera module and the second transparent liquid crystal panel 6 enables the viewer on the side of the second transparent liquid crystal panel 6 to still see the opposite side of the liquid crystal display device, thereby realizing The transparency of the simulation.

Combined with the transparency of this simulation, it can be applied in many special scenarios. Such as glass curtain walls, conference rooms, and so on. In addition, real-time processing of images obtained by the camera module can be realized to realize a richer and more fun human-computer interaction scene.

For example, the camera 8, that is, the first transparent liquid crystal panel 1 is facing the blackboard of the conference room, and the blackboard in the image can be mosaicted through the second transparent liquid crystal panel 6 so that people outside the conference room cannot see the blackboard. The content on the page prevents leaks, and at the same time, it can know the real-time meeting situation and character dynamics in the conference room. These functions are also widely used in prison meeting rooms, government offices, and bank reception windows.

Embodiment 6

A sixth embodiment of the present invention provides a liquid crystal display device, and a sixth embodiment is a further improvement of the fifth embodiment, and a main improvement is that, in the sixth embodiment of the present invention, referring to FIG. The liquid crystal display device a is placed on a car. And installed in the rear window of the car.

The second transparent liquid crystal panel 6 faces the interior space of the automobile.

When the second transparent liquid crystal panel 6 faces the interior space of the automobile, the occupant inside the vehicle can clearly see the state outside the vehicle while the first transparent liquid crystal panel 1 plays the multimedia content outside the vehicle. Therefore, it is possible to continuously deliver content to the outside of the vehicle in real time without disturbing the driver's driving experience. It can improve driving safety for the driver and a better ride for the passenger.

Embodiment 7

A seventh embodiment of the present invention provides a liquid crystal display device, and a seventh embodiment is a further improvement of the liquid crystal display device provided by the first to fifth embodiments, and a main improvement is in the seventh embodiment of the present invention. Among them, the liquid crystal display device is disposed on a car.

Among them, the liquid crystal display device can be placed at any position on the car, such as on a window or on a ceiling.

When used on a window, the first transparent liquid crystal panel 1 can be disposed toward the interior of the car for multimedia entertainment of the occupants of the vehicle. The first transparent liquid crystal panel 1 can also be disposed toward the outside of the automobile for placing advertisements or multimedia entertainment contents to other people outside the vehicle.

When the occupant in the vehicle needs to view the scenery outside the vehicle, the liquid crystal display device of some embodiments is switched to the transparent state, and the riding experience equivalent to that of the ordinary car can be obtained. And it is used on the ceiling, and it can also bring the effect of a panoramic sunroof.

In summary, a transparent liquid crystal display device having a higher contrast ratio in a scene in a car can satisfy a wider range of multimedia requirements.

Embodiment 8

An eighth embodiment of the present invention provides a liquid crystal display device, and an eighth embodiment is a further improvement of the liquid crystal display device provided in the seventh embodiment, and the main improvement is that in the eighth embodiment of the present invention The liquid crystal display device is mounted at the position of the rear window of the automobile.

Referring to FIG. 10, the control module in the liquid crystal display device a is connected to the gear position control system b of the automobile, and can switch the liquid crystal display device a to a transparent state in response to the reverse state signal.

Specifically, in some embodiments, as a preferred, the control module includes:

The logic switching unit is configured to control the shading device 3 to switch to a transparent state in response to the reverse state signal.

The content display switch is arranged to control the first transparent liquid crystal panel 1 to output a white background in response to the reverse state signal.

The light source driving unit is configured to control the first transparent backlight module 2 to stop emitting light in response to the reverse state signal.

The above three modules can separately control the shading device 3, the first transparent liquid crystal panel 1, and the first transparent backlight module 2, thereby achieving basic synchronization switching of the states of the three. Of course, the control module can also implement behavior control of the shading device 3, the first transparent liquid crystal panel 1 and the first transparent backlight module 2 in other manners.

For example, for an automatic car, when the vehicle is switched to the D position, the car is in a running state. At this time, the logic switching unit controls the light shielding device 3 to switch to the opaque state, and the content display switch controls the first transparent liquid crystal panel 1 to perform the driving process. The content display unit drives the first transparent backlight module 2 to emit light. As a result, the light emitted by the first transparent backlight module 2 passes through the first transparent liquid crystal panel 1 to cause the liquid crystal display device a to display an image. The car is able to deliver multimedia content, such as advertisements, content displays, and the like, through the first transparent liquid crystal panel 1.

Switching to the N position does not bring about a change in state when waiting for a traffic light or a little rest. When the driver needs to stop and reversing, the gear will be switched to the R position, that is, the reverse gear position, the gear position controller will send a reverse status signal, and be controlled by the logic switching unit of the control module, the content display switch and the light source. The unit responds. At this time, the logic switching unit controls the light shielding device 3 to switch to the transparent state, the content display switch controls the first transparent liquid crystal panel 1 to output a white background picture, and the light source driving unit drives the first transparent backlight module 2 to stop emitting light, and the rear window can enter. Fully transparent state.

Since the switching of the three is very rapid, the driver's observation of the state outside the rear window is not affected, and thus the safety of driving can be remarkably improved.

Embodiment 9

A ninth embodiment of the present invention provides an automobile comprising the liquid crystal display device of any one of the first to eighth embodiments.

A transparent liquid crystal display device with higher contrast is used in the scene in the car to meet a wider range of multimedia requirements.

Those skilled in the art will appreciate that in the various embodiments described above, numerous technical details are set forth to provide the reader with a better understanding of the present application. However, even without these technical details and various changes and modifications based on the above embodiments, the technical solutions claimed in the claims of the present application can be substantially realized. Therefore, various changes in the above-described embodiments may be made in the form and details without departing from the spirit and scope of the invention.

Claims

A liquid crystal display device, comprising:

a control module and a first transparent liquid crystal panel, a first transparent backlight module and a light shielding device;

The control module is coupled to the shading device to control the shading device to switch between a transparent state and an opaque state;

The control module is connected to the first transparent liquid crystal panel to control display content of the first transparent liquid crystal panel;

The control module is connected to the first transparent backlight module to control a lighting state of the first transparent backlight module.
The liquid crystal display device according to claim 1, wherein the first transparent liquid crystal panel comprises:

Two display panels spaced apart from each other and a liquid crystal material disposed between the two display panels, and FET electrodes and common electrodes disposed on opposite sides of the two display panels;

The control module controls molecular alignment of the liquid crystal material by controlling the FET electrode and the common electrode.
The liquid crystal display device of claim 1 , wherein the first transparent backlight module comprises:

a transparent light guide plate and a light source disposed at a side of the transparent light guide plate;

Light emitted by the light source is driven into the transparent light guide plate from a side of the transparent light guide plate to form a surface light source;

An array of dot dots is formed on the transparent light guide plate, and an interval between adjacent mesh dots on the dot array is less than or equal to 35 micrometers.
The liquid crystal display device according to any one of claims 1 to 3, wherein the light shielding device comprises a light shielding panel made of a polymer dispersed liquid crystal or a polymer network liquid crystal, and is used for controlling the light shielding panel to switch transparently. a switching electrode in an opaque state, the switching electrode being connected to the control module;

Alternatively, the shading device includes a blocking member and a motor for controlling the blocking member to block or leave the back surface of the first transparent backlight module, the motor being coupled to the control module.
The liquid crystal display device according to any one of claims 1 to 4, further comprising a second transparent liquid crystal panel and a second transparent backlight module;

The second transparent backlight module is located between the second transparent liquid crystal panel and the shading device.
The liquid crystal display device according to claim 5, further comprising a camera module connected to the second transparent liquid crystal panel;

The camera module is configured to capture an image of a region before the first transparent liquid crystal panel, and send the image to the second transparent liquid crystal panel for display.
A liquid crystal display device according to claim 6, wherein said liquid crystal display device is disposed on a vehicle and mounted at a position of a rear window of said automobile;

The second transparent liquid crystal panel faces the interior space of the automobile.
The liquid crystal display device according to any one of claims 1 to 4, wherein the liquid crystal display device is provided on a car.
The liquid crystal display device according to claim 8, wherein the control module in the liquid crystal display device is connected to the gear position control system of the automobile, and the liquid crystal display device is switched in response to the reverse state signal. Transparent state.
The liquid crystal display device according to claim 9, wherein the control module comprises:

a logic switching unit configured to control the shutter to switch to a transparent state in response to the reverse state signal;

a content display switch configured to control the first transparent liquid crystal panel to output a white background screen in response to the reverse state signal;

And a light source driving unit configured to control the first transparent backlight module to stop emitting light in response to the reverse state signal.
The liquid crystal display device according to claim 1, wherein the control module comprises:

a logic switching unit configured to control switching of the shading device;

a content display switch configured to control whether the first transparent liquid crystal panel performs content display;

And a light source driving unit configured to control a light emitting state of the first backlight module.
An automobile comprising the liquid crystal display device according to any one of claims 1 to 11.