CN215181298U - Second-order scattering liquid crystal display device - Google Patents

Abstract

The utility model relates to a second order scattering liquid crystal display device, including backlight and LCD, its characterized in that: the backlight source, the liquid crystal display and the scattering plate are sequentially arranged from back to front; a scattering layer is arranged on the scattering plate; the liquid crystal display is a scattering type liquid crystal display, a display area of the scattering type liquid crystal display includes an active area and an inactive area, the active area can be driven to a transparent state or a scattering state, and the inactive area is always kept to the transparent state. The second-order scattering liquid crystal display device can realize the display of second-order brightness, so that the ground color and the display color are soft colors with different brightness, and the second-order scattering liquid crystal display device is easy to form attractive matching with the appearance of a white household appliance.

Description

Second-order scattering liquid crystal display device

Technical Field

The utility model relates to a show technical field, concretely relates to second order scattering liquid crystal display device.

Background

The liquid crystal display has advantages of low power consumption, low voltage, good compatibility with semiconductor ICs, light weight, thin thickness, long life, etc., so that the liquid crystal display is not only widely used in industry and business, but also has been deeply consumed in daily life of every home.

The existing liquid crystal display mainly realizes the display of information through a color difference mode of black-white contrast, although the display mode has high contrast and clear display effect, the display color (bottom color or pen segment color) is mostly non-soft color (such as black, blue and purple), and the display color is difficult to form beautiful collocation with the appearance of white household appliances.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a second order scattering liquid crystal display device is provided, this kind of second order scattering liquid crystal display device can realize the demonstration of second order luminance, makes its base colour, shows the soft colour of colour for the luminance is different, forms pleasing to the eye collocation with the appearance of white household electrical appliances easily. The technical scheme is as follows:

a second-order scattering liquid crystal display device comprises a backlight source and a liquid crystal display, and is characterized in that: the backlight source, the liquid crystal display and the scattering plate are sequentially arranged from back to front; a scattering layer is arranged on the scattering plate; the liquid crystal display is a scattering type liquid crystal display, a display area of the scattering type liquid crystal display includes an active area and an inactive area, the active area can be driven to a transparent state or a scattering state, and the inactive area is always kept to the transparent state.

In the display area of the scattering type liquid crystal display, the inactive area is always kept in a transparent state; the active region refers to a display region of pixels, pen segments or icons, which can be driven to a transparent state or a scattering state by applying a voltage; when the driving voltage in the active region is zero (or lower), the active region is in the OFF state, and the whole display region is in the transparent state, and when sufficient voltage is applied to the active region, the active region is in the ON state, the active region is in the scattering state, and the inactive region is in the transparent state.

When the LCD works, light emitted by the backlight source firstly passes through the display area of the LCD and then is scattered to the front of the LCD through the scattering layer on the scattering plate; the non-active area is always kept in a transparent state, when the driving voltage in the active area is zero (or lower), the active area is in an OFF state, the whole display area is in the transparent state at the moment, and the light of the backlight source generates first-order scattering through the scattering layer on the scattering plate to form softer ground color; when enough voltage is applied to the active area, the active area is in an ON state, the active area is in a scattering state, light rays passing through the backlight source in the non-active area still generate first-order scattering under the action of the scattering plate, and light rays passing through the backlight source in the active area generate second-order scattering ON the scattering plate ON the basis of the first-order scattering generated by the active area, the scattering effect in the active area is strong, the formed display color is softer, and the brightness of the display color is different from that of the background color; therefore, the second-order scattering liquid crystal display device can realize the display of second-order brightness, when the second-order scattering liquid crystal display device is observed from the front, two areas can be observed to present two scattering states with different brightness due to different scattering states, the ground color and the display color can be soft colors with different brightness, and the colors are easily matched with the appearance of a white household appliance in an attractive mode.

In a preferred embodiment, the scattering layer is a white scattering layer, and the backlight source is a white light source. Therefore, the ground color and the display color of the second-order scattering liquid crystal display device are white, and the second-order scattering liquid crystal display device is more easily matched with the appearance of a white household appliance in an attractive mode.

In a preferred embodiment, the backlight is a planar light source disposed behind the liquid crystal display.

In another preferred embodiment, the backlight source is a side light source disposed at the rear side of the liquid crystal display. Thus, the brightness of the backlight source generating the second-order scattering is ensured to be larger than that of the backlight source generating the first-order scattering.

The backlight generally employs an LED lamp or an assembly including an LED lamp.

In a preferred embodiment, the diffusion plate is a transparent glass plate or a transparent plastic plate, and the diffusion layer is a light diffusion layer coated or adhered on the back side of the diffusion plate.

In a more preferred embodiment, the light diffusion layer is a milky white or light-colored light-transmissive ink coating.

In another more preferred embodiment, the light diffusion layer is a milky white or light-colored light-transmitting resin coating.

In a preferred scheme, the scattering plate and the liquid crystal display are completely laminated through a transparent adhesive layer. This prevents the scattering of light from being affected, and makes the scattering more uniform everywhere.

In a preferred scheme, the scattering type liquid crystal display comprises a liquid crystal box and a liquid crystal layer, wherein the liquid crystal box comprises a first substrate and a second substrate which are bonded with each other, the liquid crystal layer is clamped between the first substrate and the second substrate, the inner side surfaces of the first substrate and the second substrate are respectively provided with a first electrode and a second electrode, and the first electrode and the second electrode have an overlapping area; the liquid crystal layer comprises a first liquid crystal compound and a second liquid crystal compound which are mixed with each other, the first liquid crystal compound is solidified liquid crystal, and liquid crystal molecules of the first liquid crystal compound have fixed first orientation; the second liquid crystal compound is liquid crystal in a fluid state, and liquid crystal molecules of the second liquid crystal compound have a second orientation.

In the scattering-type liquid crystal display, the second liquid crystal compound and the first liquid crystal compound are in intermixed contact with each other, and the first liquid crystal compound has an alignment effect on liquid crystal molecules of the second liquid crystal compound. In a natural state (i.e., no voltage is applied to the first electrode and the second electrode and no electric field is present), the liquid crystal molecules of the first liquid crystal compound and the second liquid crystal compound have uniform orientation, and an OFF state display region is observed to be a clear transparent state; because the first liquid crystal compound and the second liquid crystal compound have consistent orientation in a natural state, the first liquid crystal compound does not need to seal the second liquid crystal compound into liquid crystal microdroplets, the proportion of the second liquid crystal compound can be greatly improved, so that the effect of an electric field on the liquid crystal layer is very sensitive, and the driving voltage required by the liquid crystal layer is lower. When sufficient voltage is applied to the first electrode and the second electrode, an electric field is formed in the liquid crystal layer in the overlapping area, the orientation of the first liquid crystal compound is unchanged, the second orientation of each liquid crystal molecule of the second liquid crystal compound deviates from the first orientation along with the change of the electric field, so that the second orientation is inconsistent with the first orientation (the liquid crystal molecules close to the first liquid crystal compound in the second liquid crystal compound are deflected relatively little, and the liquid crystal molecules far away from the first liquid crystal compound are deflected relatively much), when light passes through the liquid crystal layer, the light needs to pass through liquid crystal media with different orientations, the refractive indexes of the liquid crystal media with different orientations are generally different ON the propagation path of the light, the light can be scattered or reflected, and an ON state display area can be observed to be in an opaque turbid state. The OFF state display area of the scattering type liquid crystal display is in a transparent state, and the ON state display area is in a turbid state, so that the driving voltage required by the liquid crystal layer can be reduced, the design difficulty of a driving circuit is reduced, and the display mode of white characters ON black background can be realized under the condition of setting a black background, so that the scattering type liquid crystal display has a wider application range.

Generally, the first substrate and the second substrate are transparent glass substrates or transparent plastic substrates; the thickness of the transparent glass substrate can be 0.3-2 mm; the transparent plastic substrate can be a PET plastic sheet or a CPI film; the first substrate and the second substrate are bonded through a sealing rubber ring to form sealing for the liquid crystal layer; and spacers (such as spacer balls) for maintaining the thickness of the liquid crystal layer (generally 3-10 μm) are arranged between the first substrate and the second substrate.

More preferably, the first liquid crystal compound includes a plurality of segments of linear bodies arranged in an ordered or disordered state and connected to each other, and the second liquid crystal compound is filled in a space other than the first liquid crystal compound.

In a further preferred embodiment, the plurality of segments of the filament are interlaced into a honeycomb structure, the honeycomb structure has a plurality of holes, and the second liquid crystal compound is filled in the holes of the honeycomb structure formed by the first liquid crystal compound.

Still more preferably, the size of the pores is 0.2 μm to 2 μm. Thus, the first liquid crystal compound and the second liquid crystal compound can be fully mixed, and the light scattering property of the opaque liquid crystal layer can be improved.

Still more preferably, the volume ratio of the first liquid crystal compound to the second liquid crystal compound is 0.02 to 0.1: 1. when the first liquid crystal compound and the second liquid crystal compound have the above volume ratio, the main component of the liquid crystal layer is the second liquid crystal compound, and the occupation ratio of the second liquid crystal compound is large, so that the effect of an electric field on the liquid crystal layer is very sensitive, and in an actual device, the driving voltage required by the liquid crystal layer is lower (for example, below 10V).

In a more preferred embodiment, the first electrode and the second electrode are transparent conductive layers formed by patterning transparent conductive films, and the transparent conductive layers have external connection ends extending out of the liquid crystal layer. The transparent conductive film can be an ITO film and is patterned through photoetching; the overlapping area between the first electrode and the second electrode can be made into the pattern of pixels or pen segments; the external terminals of the first electrode and the second electrode are used for applying voltage or driving signals.

In a more preferred embodiment, the first liquid crystal compound and the second liquid crystal compound are nematic liquid crystals having birefringence or compounds thereof; the first liquid crystal compound and the second liquid crystal compound have optical axes consistent with the liquid crystal molecular orientation, and the first liquid crystal compound and the second liquid crystal compound respectively have a first refractive index and a second refractive index in a direction parallel to the optical axes and a direction perpendicular to the optical axes. Typically, the first refractive index is greater than the second refractive index.

In order to maintain the transparency of the liquid crystal layer in a natural state, it is further more preferable that the second refractive index of the second liquid crystal compound is the same as the second refractive index of the first liquid crystal compound.

In order to provide the liquid crystal layer with better transparency, in a further more preferable embodiment, the first refractive index of the second liquid crystal compound is the same as the first refractive index of the first liquid crystal compound. The first refractive index and the second refractive index of the first liquid crystal compound obtained by curing the liquid crystal are easily set to be consistent with those of the second liquid crystal compound (the required refractive index can be easily obtained by a common liquid crystal blending method), the orientation and the optical axis of the first liquid crystal compound and the second liquid crystal compound are also kept consistent in a natural state, and the back bottom area and the OFF display area of the liquid crystal display are in a clear transparent state.

Typically, the first liquid crystal compound is a positive liquid crystal, a neutral liquid crystal, or a negative liquid crystal; the second liquid crystal compound is a positive liquid crystal whose liquid crystal molecules tend to be parallel to an electric field when subjected to the electric field.

More preferably, the first liquid crystal compound is formed by curing liquid crystal molecules aligned in advance through a crosslinking reaction. The liquid crystal molecules of the first liquid crystal compound may be nematic liquid crystal molecules modified with unsaturated groups (for example, -CH = CH2) at the ends, and in the manufacturing process, a photosensitizer may be added to the liquid crystal, the liquid crystal is disposed between the first substrate and the second substrate to form a liquid crystal layer (which may be disposed by a common method for liquid crystal displays such as vacuum infusion and drip irrigation), and then ultraviolet light is irradiated to cause the liquid crystal molecules of the first liquid crystal compound to undergo a cross-linking reaction and be cured. Before the first liquid crystal compound is cured, the liquid crystal layer has a certain orientation (such as horizontal orientation or vertical orientation, specifically related to the materials of the inner surfaces of the first substrate and the second substrate (the orientation can be further stabilized by a process such as heating and re-aligning), when the first liquid crystal compound is cured, the orientation is fixed in the first liquid crystal compound (and is not affected by an electric field subsequently), and the second liquid crystal compound is affected by the inner surfaces of the first substrate and the second substrate and the first liquid crystal compound, and can keep a uniform orientation in a natural state.

In the case where the second liquid crystal compound is a positive liquid crystal, the first liquid crystal compound and the second liquid crystal compound are more preferably horizontally aligned. More preferably, the inner side surfaces of the first substrate and the second substrate are both provided with a horizontal alignment layer. In a further more preferred embodiment, the horizontal alignment layer is a horizontal alignment polyimide coating.

The utility model discloses a second order scattering liquid crystal display device can realize the demonstration of second order luminance, can observe two kinds of scattering states that two regions appear for the luminance difference because of the strong and weak difference of scattering state when observing in the front, and its ground colour can be for the soft look of luminance difference with showing the colour, and its colour forms pleasing to the eye collocation with the appearance of white household electrical appliances easily.

Drawings

Fig. 1 is a schematic structural diagram of a first preferred embodiment of the present invention.

Fig. 2 is a perspective view of fig. 1.

Fig. 3 is a schematic structural diagram of a scattering-type lcd according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of fig. 3.

FIG. 5 is a schematic view showing a structure of a first liquid crystal compound in the scattering type liquid crystal display shown in FIG. 3.

Fig. 6 is a reaction scheme of liquid crystal molecules of the first liquid crystal compound of fig. 5 and curing thereof.

Fig. 7 is a schematic diagram of the liquid crystal alignment of the OFF state display region in the PDLC display of fig. 3.

Fig. 8 is a schematic diagram of the liquid crystal alignment of the ON state display region in the PDLC display of fig. 3.

Fig. 9 is a schematic structural view of a second preferred embodiment of the present invention.

Detailed Description

Example one

As shown in fig. 1 and 2, the second-order scattering liquid crystal display device includes a backlight 1, a scattering liquid crystal display 2, and a scattering plate 3, where the backlight 1, the scattering liquid crystal display 2, and the scattering plate 3 are sequentially disposed from back to front; the scattering plate 3 is provided with a scattering layer 31; the display area 201 of the scattering-type liquid crystal display 2 includes an active area 2011 and an inactive area 2012, the active area 2011 can be driven to a transparent state or a scattering state, and the inactive area 2012 is always kept in the transparent state.

In the present embodiment, the backlight 1 is a planar white light source disposed on the rear side of the scattering-type liquid crystal display 2. The backlight 1 generally employs an LED lamp or an assembly including LED lamps.

In the present embodiment, the diffusion plate 3 is a transparent glass plate or a transparent plastic plate, the diffusion layer 31 is a light diffusion layer coated or adhered on the rear side surface of the diffusion plate 3, and the light diffusion layer is a milky white or light-colored light-transmitting ink coating or light-transmitting resin coating.

In the present embodiment, the scattering plate 3 and the scattering-type liquid crystal display 2 are completely attached to each other by the transparent adhesive layer 32. This prevents the scattering of light from being affected, and makes the scattering more uniform everywhere.

Referring to fig. 3 to 8, the scattering-type lcd 2 includes a liquid crystal cell 21 and a liquid crystal layer 22, the liquid crystal cell 21 includes a first substrate 211 and a second substrate 212 bonded to each other, the liquid crystal layer 22 is sandwiched between the first substrate 211 and the second substrate 212, a first electrode 213 and a first electrode 214 are respectively disposed on inner side surfaces of the first substrate 211 and the second substrate 212, and an overlapping region 215 exists between the first electrode 213 and the first electrode 214; the liquid crystal layer 22 includes a first liquid crystal compound 221 and a second liquid crystal compound 222 which are mixed with each other, the first liquid crystal compound 221 is a cured liquid crystal, and liquid crystal molecules of the first liquid crystal compound 221 have a fixed first orientation; the second liquid crystal compound 222 is a liquid crystal in a fluid state, and liquid crystal molecules of the second liquid crystal compound 222 have a second orientation; the second orientation is consistent with the first orientation when no voltage is applied to the first electrodes 213 and 214 and no electric field is present, and the second orientation deviates from the first orientation as the electric field changes when the voltage is applied to the first electrodes 213 and 214 to generate the electric field.

In the scattering-type liquid crystal display 2, since the second liquid crystal compound 222 and the first liquid crystal compound 221 are in intermixed contact with each other, the first liquid crystal compound 221 has an alignment effect on the liquid crystal molecules of the second liquid crystal compound 222, and since the first liquid crystal compound 221 and the second liquid crystal compound 222 have a uniform alignment in a natural state (i.e., no voltage is applied to the first electrode 213 and the first electrode 214 and no electric field is present), it can be observed that the OFF state display region is a clear transparent state; since the first liquid crystal compound 221 and the second liquid crystal compound 222 have the same orientation in a natural state, the first liquid crystal compound 221 does not need to seal the second liquid crystal compound 222 into liquid crystal droplets, and the proportion of the second liquid crystal compound 222 can be greatly increased, so that the effect of an electric field on the liquid crystal layer 22 is very sensitive, and in an actual device, the driving voltage required by the liquid crystal layer 22 is relatively low. When a sufficient voltage is applied to the first electrode 213 and the first electrode 214 to generate an electric field, the orientation of the first liquid crystal compound 221 is not changed, and the second orientation of each liquid crystal molecule of the second liquid crystal compound 222 deviates from the first orientation with the change of the electric field, so that the second orientation is not consistent with the first orientation (the liquid crystal molecules near the first liquid crystal compound 221 in the second liquid crystal compound 222 are deflected relatively little, and the liquid crystal molecules far from the first liquid crystal compound 221 are deflected relatively much), when light passes through the liquid crystal layer 22, it needs to pass through liquid crystal media with different orientations, the refractive indexes of the liquid crystal media with different orientations are generally different ON the propagation path of the light, the light can be scattered or reflected, and an ON state display area can be observed to be in an opaque turbid state.

In this embodiment, the first substrate 211 and the second substrate 212 are transparent glass substrates or transparent plastic substrates (the transparent plastic substrates may be PET plastic sheets or CPI films); the thickness of the transparent glass substrate is 0.3-2 mm; the thickness of the liquid crystal layer 22 is 3 μm to 10 μm; the first substrate 211 and the second substrate 212 are bonded by a sealing rubber 216 and form a seal for the liquid crystal layer 22.

In this embodiment, the first liquid crystal compound 221 includes a plurality of linear bodies 2211, the plurality of linear bodies 2211 are arranged in an ordered or disordered state and are interwoven into a honeycomb structure, the honeycomb structure has a plurality of holes 2212, the size of the holes 2212 is 0.2 μm to 2 μm, the second liquid crystal compound 222 is filled in the holes 2212 of the honeycomb structure formed by the first liquid crystal compound 221, and the volume ratio of the first liquid crystal compound 221 to the second liquid crystal compound 222 is 0.02 to 0.1: 1. thus, the first liquid crystal compound 221 and the second liquid crystal compound 222 can be fully mixed, and the light scattering property of the opaque liquid crystal layer 22 can be improved; when the first liquid crystal compound 221 and the second liquid crystal compound 222 have the above volume ratio, the main component of the liquid crystal layer 22 is the second liquid crystal compound 222, and the second liquid crystal compound 222 has a large volume ratio, so that the effect of an electric field on the liquid crystal layer 22 is very sensitive, and in an actual device, the driving voltage required by the liquid crystal layer 22 is relatively low (e.g., below 10V).

In the embodiment, the first electrodes 213 and 214 are transparent conductive layers formed by patterning transparent conductive films, and the transparent conductive layers have external terminals extending out of the liquid crystal layer 22. The transparent conductive film can be an ITO film and is patterned through photoetching; the overlap area 215 between the first electrode 213 and the first electrode 214 may be patterned as pixels or segments; the external terminals of the first electrode 213 and the first electrode 214 are used for applying a voltage or a driving signal.

In this embodiment, the first liquid crystal compound 221 and the second liquid crystal compound 222 are nematic liquid crystals having birefringence or compounds thereof; the first liquid crystal compound 221 and the second liquid crystal compound 222 have optical axes corresponding to the liquid crystal molecular orientations thereof, the first liquid crystal compound 221 and the second liquid crystal compound 222 have a first refractive index and a second refractive index in a direction parallel to the optical axes and a direction perpendicular to the optical axes, respectively, the first refractive index is greater than the second refractive index, the second refractive index of the second liquid crystal compound 222 is corresponding to the second refractive index of the first liquid crystal compound 221, and the first refractive index of the second liquid crystal compound 222 is corresponding to the first refractive index of the first liquid crystal compound 221. The first refractive index and the second refractive index of the first liquid crystal compound 221 formed by curing the liquid crystal are easily set to be the same as those of the second liquid crystal compound 222 (the desired refractive index can be easily obtained by a general liquid crystal blending method), the orientations and the optical axes of the first liquid crystal compound 221 and the second liquid crystal compound 222 are also kept to be the same in a natural state, and the back region and the OFF state display region of the scattering liquid crystal display 2 are both in a clear transparent state.

In this embodiment, the first liquid crystal compound 221 is a positive liquid crystal, a neutral liquid crystal, or a negative liquid crystal; the second liquid crystal compound 222 is a positive liquid crystal whose liquid crystal molecules tend to be parallel to an electric field when subjected to the electric field.

In the present embodiment, the first liquid crystal compound 221 is formed by curing liquid crystal molecules aligned in advance through a cross-linking reaction. The liquid crystal molecules of the first liquid crystal compound 221 may be nematic liquid crystal molecules having an unsaturated group (e.g., -CH = CH2) at an end thereof, and in the manufacturing process, a photosensitizer may be added to the liquid crystal, the liquid crystal is disposed between the first substrate 211 and the second substrate 212 to form the liquid crystal layer 22 (which may be disposed by a common method for liquid crystal displays such as vacuum infusion and drip irrigation), and then ultraviolet light is irradiated to cause a cross-linking reaction of the liquid crystal molecules of the first liquid crystal compound 221, so as to be cured. Before the first liquid crystal compound 221 is cured, the liquid crystal layer 22 has a certain orientation (e.g., horizontal orientation or vertical orientation, specifically related to the materials of the inner surfaces of the first substrate 211 and the second substrate 212 (the orientation may be further stabilized by a process such as heating, thermal alignment, etc.), and when the first liquid crystal compound 221 is cured, the orientation is fixed in the first liquid crystal compound 221 (and is not affected by an electric field later), and the second liquid crystal compound 222 is affected by the inner surfaces of the first substrate 211 and the second substrate 212 and the first liquid crystal compound 221, and can maintain a uniform orientation in a natural state.

In this embodiment, the first liquid crystal compound 221 and the second liquid crystal compound 222 are horizontally aligned; the inner side surfaces of the first substrate 211 and the second substrate 212 are both provided with a horizontal alignment layer 217, and the horizontal alignment layer 217 is a horizontal alignment polyimide coating.

The following briefly describes the working principle of the present second-order scattering liquid crystal display device:

in operation, light emitted from the backlight 1 firstly passes through the display area 201 of the scattering type lcd 2, and then is scattered to the front of the scattering type lcd 2 by the scattering layer 31 on the scattering plate 3; since the inactive region 2012 is always kept in the transparent state, when the driving voltage in the active region 2011 is zero (or lower), the active region 2011 is in the OFF state, at this time, the entire display region 201 is in the transparent state, and the light of the backlight 1 generates first-order scattering through the scattering layer 31 on the scattering plate 3, so as to form a softer ground color; when sufficient voltage is applied to the active area 2011, the active area 2011 is in an ON state, the active area 2011 is in a scattering state, light passing through the backlight source 1 of the non-active area 2012 still generates first-order scattering under the action of the scattering plate 3, and light passing through the backlight source 1 of the active area 2011 generates second-order scattering ON the scattering plate 3 ON the basis of the first-order scattering generated by the active area 2011, so that the scattering effect in the active area 2011 is strong, the formed display color is softer, and the brightness of the display color is different from the background color; therefore, the second-order scattering liquid crystal display device can realize the display of second-order brightness, when the second-order scattering liquid crystal display device is observed from the front, two areas can be observed to present two scattering states with different brightness due to different scattering states, the ground color and the display can be soft colors with different brightness, and the colors are easily matched with the appearance of a white household appliance in an attractive mode.

Example two

Referring to fig. 9, in the case where the other parts are the same as those of the first embodiment, the difference is: in the present embodiment, the backlight 1 is a side light source disposed at the rear side of the scattering-type liquid crystal display 2. In this way, it is ensured that the brightness of the backlight 1 producing the second order scattering is necessarily greater than the brightness thereof producing the first order scattering.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structure, the features and the principle of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A second-order scattering liquid crystal display device comprises a backlight source and a liquid crystal display, and is characterized in that: the backlight source, the liquid crystal display and the scattering plate are sequentially arranged from back to front; a scattering layer is arranged on the scattering plate; the liquid crystal display is a scattering type liquid crystal display, a display area of the scattering type liquid crystal display includes an active area and an inactive area, the active area can be driven to a transparent state or a scattering state, and the inactive area is always kept to the transparent state.

2. A second order scattering liquid crystal display device as claimed in claim 1, wherein: the scattering layer is a white scattering layer, and the backlight source is a white light source.

3. A second order scattering liquid crystal display device as claimed in claim 1, wherein: the backlight source is a planar light source arranged at the rear side of the liquid crystal display; or the backlight source is a side light source arranged at the rear side of the liquid crystal display.

4. A second order scattering liquid crystal display device as claimed in claim 1, wherein: the diffusion plate is a transparent glass plate or a transparent plastic plate, and the diffusion layer is a light diffusion layer coated or adhered on the back side surface of the diffusion plate.

5. The second order scattering liquid crystal display device of claim 4, wherein: the light diffusion layer is a milky white or light-colored light-transmitting ink coating; or the light diffusion layer is a milky white or light-colored light-transmitting resin coating.

6. A second order scattering liquid crystal display device as claimed in claim 1, wherein: the scattering plate and the liquid crystal display are completely attached through a transparent adhesive layer.

7. A second order scattering liquid crystal display device as claimed in any one of claims 1 to 6, wherein: the scattering type liquid crystal display comprises a liquid crystal box and a liquid crystal layer, wherein the liquid crystal box comprises a first substrate and a second substrate which are bonded with each other, the liquid crystal layer is clamped between the first substrate and the second substrate, the inner side surfaces of the first substrate and the second substrate are respectively provided with a first electrode and a second electrode, and the first electrode and the second electrode have an overlapping area; the liquid crystal layer comprises a first liquid crystal compound and a second liquid crystal compound which are mixed with each other, the first liquid crystal compound is solidified liquid crystal, and liquid crystal molecules of the first liquid crystal compound have fixed first orientation; the second liquid crystal compound is liquid crystal in a fluid state, and liquid crystal molecules of the second liquid crystal compound have a second orientation.

8. A second order scattering liquid crystal display device as claimed in claim 7, wherein: the first liquid crystal compound includes a plurality of segments arranged in an ordered or disordered state and connected to each other, and the second liquid crystal compound is filled in a space other than the first liquid crystal compound.

9. A second order scattering liquid crystal display device as claimed in claim 8, wherein: the multi-section linear bodies are interwoven into a honeycomb structure, the honeycomb structure is provided with a plurality of holes, and the size of each hole is 0.2-2 mu m; the second liquid crystal compound is filled in the holes of the honeycomb structure formed by the first liquid crystal compound, and the volume ratio of the first liquid crystal compound to the second liquid crystal compound is 0.02-0.1: 1.

10. a second order scattering liquid crystal display device as claimed in claim 7, wherein: the first electrode and the second electrode are transparent conductive layers formed by patterning transparent conductive films, and the transparent conductive layers are provided with external terminals extending out of the liquid crystal layer; the first liquid crystal compound and the second liquid crystal compound are nematic liquid crystals with birefringence or compounds thereof, the first liquid crystal compound and the second liquid crystal compound have optical axes consistent with the liquid crystal molecular orientation, the first liquid crystal compound and the second liquid crystal compound respectively have a first refractive index and a second refractive index in the directions parallel to the optical axes and perpendicular to the optical axes, the second refractive index of the second liquid crystal compound is consistent with the second refractive index of the first liquid crystal compound, and the first refractive index of the second liquid crystal compound is consistent with the first refractive index of the first liquid crystal compound.

Images