CN219891510U - Liquid crystal display module and liquid crystal display device - Google Patents
Liquid crystal display module and liquid crystal display device Download PDFInfo
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- CN219891510U CN219891510U CN202321526988.6U CN202321526988U CN219891510U CN 219891510 U CN219891510 U CN 219891510U CN 202321526988 U CN202321526988 U CN 202321526988U CN 219891510 U CN219891510 U CN 219891510U
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- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 claims description 45
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Abstract
The embodiment of the utility model discloses a liquid crystal display module and a liquid crystal display device. The liquid crystal display module comprises: a backlight; a liquid crystal display cell for controlling the image display; the liquid crystal display box comprises a color film substrate, wherein the color film substrate comprises a color resistance layer and a black matrix, the color resistance layer comprises a plurality of mutually independent color resistances, and the black matrix is filled in gaps among the color resistances; the visual angle dimming box is used for controlling the wide and narrow visual angles of images displayed by the liquid crystal display box; the composite metal layer is arranged on the light emitting side of the liquid crystal display box, and comprises a metal pattern made of negative dielectric constant metal, and the metal pattern is overlapped with the projection of the pattern of the black matrix on the light emitting surface. The embodiment of the utility model solves the problem that the peep-proof effect of the traditional peep-proof display screen is still poor, and can further reflect the light rays emitted from the large viewing angle in the narrow viewing angle mode while realizing the switching of the wide viewing angle mode, thereby further optimizing the peep-proof performance in the narrow viewing angle.
Description
Technical Field
The embodiment of the utility model relates to the technical field of display, in particular to a liquid crystal display module and a liquid crystal display device.
Background
With the development of society, people pay more and more attention to privacy protection, when liquid crystal display devices such as mobile phones and tablet computers are used in public places, contents in a display screen are inevitably leaked, so that people enjoy the convenience of the electronic display devices, and meanwhile, the people also hope to effectively protect business confidentiality and personal privacy in the public places.
In the current mainstream peep-proof display screen, the peep-proof film is attached to the display screen to achieve the peep-proof function, but when a user needs to watch at a wide viewing angle, the peep-proof film needs to be taken off, inconvenience is brought, and meanwhile, the price of the peep-proof film is relatively high; the imaging at the narrow viewing angle is realized by using the concentrated backlight to achieve the peep-proof function, the concentrated backlight has high price and poor narrow viewing angle effect; when the viewing angle controller is matched with the LCD and the shutter shielding film to achieve the peep-proof function, the cost of the shutter shielding film is high and the narrow viewing angle effect is still not good.
Disclosure of Invention
The utility model provides a liquid crystal display module and a liquid crystal display device, which are used for realizing switching of a wide-and-narrow view angle mode and simultaneously further optimizing peep-proof performance in the narrow-view angle mode.
In a first aspect, an embodiment of the present utility model provides a liquid crystal display module, including:
a backlight source for emitting backlight;
the liquid crystal display box is positioned at the light emitting side of the backlight source and is used for controlling the image display; the liquid crystal display box comprises a color film substrate, wherein the color film substrate comprises a color resistance layer and a black matrix, the color resistance layer comprises a plurality of mutually independent color resistances, and the black matrix is filled in gaps among the color resistances;
the visual angle dimming box is positioned on the light emitting side of the liquid crystal display box and is used for controlling the wide and narrow visual angles of images displayed by the liquid crystal display box;
the composite metal layer is arranged on the light emitting side of the liquid crystal display box, and comprises a metal pattern made of negative dielectric constant metal, and the metal pattern is overlapped with the projection of the pattern of the black matrix on the light emitting surface.
Optionally, the composite metal layer is located in the viewing angle regulating box.
Optionally, the viewing angle dimming box comprises a first substrate and a second substrate, and a first liquid crystal layer positioned between the first substrate and the second substrate; a first transparent electrode layer is arranged on one side of the first substrate facing the first liquid crystal layer, and a second transparent electrode layer is arranged on one side of the second substrate facing the first liquid crystal layer; the first substrate is positioned between the liquid crystal display box and the second substrate;
the composite metal layer is arranged between the first substrate and the first transparent electrode layer, and an insulating layer is arranged between the composite metal layer and the first transparent electrode layer.
Optionally, the liquid crystal display box further comprises an array substrate and a second liquid crystal layer positioned between the color film substrate and the array substrate, and the array substrate is positioned between the second liquid crystal layer and the backlight source;
the color resistance layer and the black matrix are formed on one side of the color film substrate, which is close to the second liquid crystal layer; the composite metal layer is positioned at one side of the color film substrate far away from the second liquid crystal layer.
Optionally, the composite metal layer comprises negative dielectric constant metal and silver, and the thickness ratio of the negative dielectric constant metal to the silver is 5:5-5:10 nm.
Optionally, the liquid crystal display device further comprises a PDLC dimming box, wherein the PDLC dimming box is positioned on the light emitting side of the liquid crystal display box and is used for controlling the wide and narrow viewing angles of images displayed by the liquid crystal display box in cooperation with the viewing angle dimming box;
the PDLC dimming box comprises a third substrate, a fourth substrate and a polymer dispersed liquid crystal layer; the polymer dispersed liquid crystal layer is positioned between the third substrate and the fourth substrate;
a third transparent electrode is arranged on one side surface of the third substrate facing the polymer dispersed liquid crystal layer, and a fourth transparent electrode is arranged on one side surface of the fourth substrate facing the polymer dispersed liquid crystal layer;
the polymer dispersed liquid crystal layer comprises a polymer layer and liquid crystal microdroplets, wherein the liquid crystal microdroplets are distributed in the polymer layer;
under the control of loading an electric field on the third transparent electrode and the fourth transparent electrode, the PDLC dimming box has a wide-viewing-angle mode and a narrow-viewing-angle mode;
in the wide viewing angle mode, the third transparent electrode and the fourth transparent electrode are not loaded with an electric field, and liquid crystal droplets in the polymer dispersed liquid crystal layer are in scattered arrangement;
in the narrow viewing angle mode, the third transparent electrode and the fourth transparent electrode are loaded with an electric field, and liquid crystal droplets in the polymer dispersed liquid crystal layer are regularly arranged.
Optionally, the PDLC dimming box is located at a light emitting side of the viewing angle dimming box, or the PDLC dimming box is located between the viewing angle dimming box and the liquid crystal display box.
Optionally, the backlight module further comprises a shutter film and a brightness enhancement film, wherein the shutter film and the brightness enhancement film are positioned between the backlight source and the liquid crystal display box, and the brightness enhancement film is positioned between the shutter film and the backlight source.
Optionally, the visual angle light-adjusting box further comprises a surface treatment polaroid, wherein the surface treatment polaroid is arranged on the light-emitting side of the visual angle light-adjusting box.
In a second aspect, an embodiment of the present utility model further provides a liquid crystal display device, including a liquid crystal display module according to any one of the first aspect.
According to the technical scheme, a backlight source is arranged in the liquid crystal display module and used for emitting backlight; the liquid crystal display box is positioned at the light emitting side of the backlight source and is used for controlling the image display; the liquid crystal display box comprises a color film substrate, wherein the color film substrate comprises a color resistance layer and a black matrix, the color resistance layer comprises a plurality of mutually independent color resistances, and the black matrix is filled in gaps among the color resistances; the visual angle dimming box is positioned on the light emitting side of the liquid crystal display box and is used for controlling the wide and narrow visual angles of images displayed by the liquid crystal display box; the composite metal layer is arranged on the light emitting side of the liquid crystal display box, and comprises a metal pattern made of negative dielectric constant metal, and the metal pattern is overlapped with the projection of the pattern of the black matrix on the light emitting surface. The embodiment of the utility model solves the problem that the peep-proof effect of the traditional peep-proof display screen is still not good, and can further reflect the light rays emitted from the large visual angle in the narrow visual angle mode while realizing the switching of the wide and narrow visual angle modes, so that the peep-proof performance is further optimized, and the display panel realizes the wide and narrow visual angle mode with better effect.
Drawings
Fig. 1 is a schematic structural diagram of a liquid crystal display module according to an embodiment of the utility model;
FIG. 2 is a graph showing the reflectivity of a composite metal layer at different film thickness ratios according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of another LCD module according to an embodiment of the present utility model;
fig. 4 and 5 are schematic views of the lcd module shown in fig. 1 in a wide viewing angle mode and a narrow viewing angle mode, respectively
FIG. 6 is a schematic diagram of another LCD module according to an embodiment of the present utility model;
fig. 7 and 8 are schematic views illustrating states of the lcd module shown in fig. 6 in a wide viewing angle mode and a narrow viewing angle mode, respectively;
fig. 9 and 10 are schematic structural diagrams of two other liquid crystal display modules according to an embodiment of the utility model;
FIG. 11 is a schematic view showing light transmittance of the LCD module of FIG. 10 in a wide-narrow viewing angle mode, respectively;
FIG. 12 is a graph showing transmittance of a viewing angle adjusting box according to a change in viewing angle;
fig. 13 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Fig. 1 is a schematic structural diagram of a liquid crystal display module according to an embodiment of the utility model, and referring to fig. 1, the liquid crystal display module includes: a backlight 10 for emitting backlight; a liquid crystal display box 20, which is positioned at the light emitting side of the backlight 10, for controlling the image display; the liquid crystal display box 20 comprises a color film substrate 21, wherein the color film substrate 21 comprises a color resistance layer and a black matrix 212, the color resistance layer comprises a plurality of color resistances 2110 which are mutually independent, and the black matrix 212 is filled in gaps among the color resistances 2110; a viewing angle adjusting box 30, located at the light emitting side of the liquid crystal display box 20, for controlling the wide and narrow viewing angles of the images displayed by the liquid crystal display box 20; the composite metal layer 40 is disposed on the light emitting side of the liquid crystal display cell 20, and the composite metal layer 40 includes a metal pattern 41 made of a metal with a negative dielectric constant, wherein the metal pattern 41 overlaps with the projection of the pattern of the black matrix 212 on the light emitting surface.
First, as can be understood by those skilled in the art, in this embodiment, backlight is emitted through the backlight source 10, and then selectively transmitted through the liquid crystal display box 20 at different positions, i.e. in different sub-pixels, and meanwhile, color resistance of the color film substrate 21 on the liquid crystal display box 20 is utilized to filter, so that different colors can be displayed in different sub-pixels on a microscopic scale, and full-color display of the pixel units is realized based on color matching of the sub-pixels with different colors, thereby realizing picture display of the liquid crystal display module on a macroscopic scale. As can be seen from the above, the display function of the lcd module in this embodiment is mainly realized by the backlight 10 and the lcd box 20.
Based on the above-mentioned picture display function, the viewing angle dimming box 30 and the composite metal layer 40 are further provided in this embodiment, and are mainly used for controlling the viewing angle during picture display, so as to realize two display modes of wide viewing angle and narrow viewing angle. In the wide viewing angle mode, a user can watch a display picture in a large viewing angle area, wherein the large viewing angle area refers to an area deviating from a front viewing angle opposite to the liquid crystal display module, that is, in the wide viewing angle mode, display light of the display panel can be emitted in a front viewing angle direction perpendicular to the light emitting side surface of the liquid crystal display module, and can also be emitted in a large viewing angle direction with a small acute angle with the light emitting side surface of the liquid crystal display module. In contrast, in the narrow viewing angle mode, the user can only watch the display screen in the forward viewing angle region, but cannot watch the display screen when watching in the large viewing angle region, so that the peep-proof effect is realized.
For the viewing angle adjusting box 30, those skilled in the art can control the liquid crystal posture by the electric field, so as to realize the selective emergence of the light rays with different viewing angles. Specifically, in the wide viewing angle mode, the liquid crystal molecules can be driven to be in a lying posture or an upright posture by applying a corresponding electric field, and at the moment, the liquid crystal molecules have no selective effect on light rays, and emergent light of different viewing angles can be emergent, so that the wide viewing angle mode is realized. When in the narrow viewing angle mode, the liquid crystal molecules can be driven to be in an inclined posture by applying a corresponding electric field, and at the moment, the liquid crystal molecules have a refraction effect on the emergent angle of the light, so that the light emergent in the large viewing angle direction can be refracted to be emergent in the small viewing angle direction, namely, the effect of concentrating the emergent angle of the light is achieved, and the display panel is in the narrow viewing angle mode.
For the composite metal layer 40, a negative dielectric constant metal is adopted in the component parts, and part of light rays in the large viewing angle direction can be reflected by the negative dielectric constant metal, so that part of light rays emitted in the large viewing angle direction are blocked, and light rays emitted in the small viewing angle or positive viewing angle direction are ensured. It can be understood that, for the narrow view mode, the composite metal layer 40 in the embodiment of the present utility model can select and filter the view angle of the outgoing light, so as to achieve the effect of optimizing the peep-proof performance of the narrow view mode. In addition, in this embodiment, the metal pattern of the composite metal layer 40 and the black matrix 212 on the color film substrate 21 in the liquid crystal display box 20 are kept to overlap in projection, so that the light transmitted by the sub-pixels can be avoided from being additionally blocked while the light transmitted by the liquid crystal display box 20 from different viewing angles is selected and filtered, thereby avoiding excessive light filtering and ensuring the display brightness of the whole display panel.
According to the technical scheme of the embodiment, a backlight source is arranged in the liquid crystal display module and used for emitting backlight; the liquid crystal display box is positioned at the light emitting side of the backlight source and is used for controlling the image display; the liquid crystal display box comprises a color film substrate, wherein the color film substrate comprises a color resistance layer and a black matrix, the color resistance layer comprises a plurality of mutually independent color resistances, and the black matrix is filled in gaps among the color resistances; the visual angle dimming box is positioned on the light emitting side of the liquid crystal display box and is used for controlling the wide and narrow visual angles of images displayed by the liquid crystal display box; the composite metal layer is arranged on the light emitting side of the liquid crystal display box, and comprises a metal pattern made of negative dielectric constant metal, and the metal pattern is overlapped with the projection of the pattern of the black matrix on the light emitting surface. The embodiment of the utility model solves the problem that the peep-proof effect of the traditional peep-proof display screen is still not good, and can further reflect the light rays emitted from the large visual angle in the narrow visual angle mode while realizing the switching of the wide and narrow visual angle modes, so that the peep-proof performance is further optimized, and the display panel realizes the wide and narrow visual angle mode with better effect.
Fig. 2 is a graph of reflectivity of a composite metal layer with different film thickness ratios according to an embodiment of the present utility model, and referring to fig. 2, it can be seen that the composite metal layer with certain film thickness ratios can achieve a larger reflectivity in a larger viewing angle range, for example, 35 ° to 90 °. Based on this, in embodiments of the present utility model, the optional composite metal layer comprises a negative dielectric constant metal and silver, and the thickness ratio of the negative dielectric constant metal to silver is 5nm to 5nm or 5nm to 10nm. Wherein the negative dielectric constant metal is specifically calcium.
In one embodiment, the optional composite metal layer is located in the viewing angle regulating box. With continued reference to fig. 1, more specifically, the viewing angle regulating box 30 includes a first substrate 31 and a second substrate 32, and a first liquid crystal layer 33 between the first substrate 31 and the second substrate 32; a first transparent electrode layer 34 is provided on a side of the first substrate 31 facing the first liquid crystal layer 33, and a second transparent electrode layer 35 is provided on a side of the second substrate 32 facing the first liquid crystal layer 33; the first substrate 31 is located between the liquid crystal display cell 20 and the second substrate 32. Based on this, a composite metal layer 40 may be provided between the first substrate 31 and the first transparent electrode layer 34, and an insulating layer 36 is provided between the composite metal layer 40 and the first transparent electrode layer 34.
In this embodiment, the composite metal layer 40 is specifically prepared when a film layer is prepared on the first substrate 31 of the viewing angle adjusting box 30, and in order to avoid that the first transparent electrode layer 34 on the first substrate 31 is electrically connected with the composite metal layer 40, and the loading of the electrical signal on the first transparent electrode layer 34 is affected, the insulation between the first transparent electrode layer 34 and the composite metal layer 40 is realized, and an insulation layer 36 is required to be disposed between the composite metal layer 40 and the first transparent electrode layer 34. The insulating layer 36 may be made of a transparent organic resin or the like, and is not limited thereto.
Fig. 3 is a schematic structural diagram of another lcd module according to an embodiment of the present utility model, referring to fig. 3, specifically, the lcd box 20 further includes an array substrate 22 and a second liquid crystal layer 23 located between the color film substrate 21 and the array substrate 22, and the array substrate 22 is located between the second liquid crystal layer 23 and the backlight 10; the color resist layer and the black matrix 212 are formed on a side of the color film substrate 21 near the second liquid crystal layer 23. Based on this, in another embodiment of the present utility model, the optional composite metal layer 40 is located on the side of the color film substrate 21 away from the second liquid crystal layer 23.
This embodiment illustrates another preferred placement of the composite metal layer 40 in practical use, i.e. it is prepared on the surface of the color film substrate 21 on the side facing away from the second liquid crystal layer 23. One skilled in the art will appreciate that the color filter substrate 21 is generally required to be provided with a color blocking layer and a black matrix 212 on a side close to the second liquid crystal layer 23, and a surface of a side facing away from the second liquid crystal layer 23 is generally in a free state. In this embodiment, the composite metal layer 40 is integrated on the color film substrate 21, and after the lcd cell 20 achieves display dimming, the composite metal layer 40 is used to directly adjust and filter the viewing angle of the outgoing light.
Fig. 4 and fig. 5 are schematic views of the liquid crystal display module shown in fig. 1 in a wide viewing angle mode and a narrow viewing angle mode, respectively, and referring to fig. 4 and fig. 5, the working principle and the light propagation path of the liquid crystal display module in the two viewing angle modes are described in detail with reference to the specific structure of the viewing angle dimming box:
in the wide viewing angle mode, the first transparent electrode layer 34 and the second transparent electrode layer 35 are loaded with a smaller or larger electric field (the electric field E1 is shown as a larger electric field in the drawing), so that the liquid crystal molecules in the first liquid crystal layer 33 are in a lying state or an upright state, at this time, the light rays emitted from the large viewing angle, the small viewing angle or the positive viewing angle are all refracted at the short axis or the long axis of the liquid crystal molecules, the refractive indexes are the same, and the light rays have a astigmatism effect, and enter the human eyes after being dispersed, that is, the human eyes can observe the display image at the large viewing angle, the small viewing angle or the positive viewing angle.
In the narrow viewing angle mode, the first transparent electrode layer 34 and the second transparent electrode layer 35 are loaded with a moderate electric field (in the drawing, the example electric field E2 is a moderate electric field, that is, E2 < E1), so that the liquid crystal molecules in the first liquid crystal layer 33 are in an inclined state, at this time, the light with a small viewing angle or a positive viewing angle is refracted at the long axis of the liquid crystal molecules, the light with a large viewing angle is refracted at the short axis of the liquid crystal molecules, so that the light emitted from the large viewing angle direction is refracted towards the middle direction, that is, a condensation effect is formed, so that the light reaching the large viewing angle area is reduced, and the human eyes cannot receive the emitted light in the large viewing angle area, so that the peep-proof effect is realized.
In an alternative embodiment of the present utility model, the liquid crystal display module may be further provided with a louver film 50 and a brightness enhancing film 60, the louver film 50 and the brightness enhancing film 60 being located between the backlight 10 and the liquid crystal display cell 20, and the brightness enhancing film 60 being located between the louver film 50 and the backlight 10.
The shutter film 50 and the brightness enhancement film 60 can be attached to the light-emitting side surface of the backlight 10 during practical application, and the shutter film 50 is used for shielding the light with a large viewing angle emitted from the backlight 10 by using the shutter type light shielding structure, and transmitting the light with a small viewing angle, so that the peeping prevention effect under the narrow viewing angle mode can be realized to a certain extent.
In an alternative embodiment of the present utility model, the liquid crystal display module may further include a surface treatment polarizer 70, where the surface treatment polarizer 70 is disposed on the light emitting side of the viewing angle adjusting box 30.
The surface treatment polarizer 70 is mainly used for filtering the light incident from the outside into the lcd module, and those skilled in the art can know that the polarizer 60 has the ability of transmitting the polarized light with the polarization direction parallel to the transmission axis, and filtering the polarized light with other polarization directions, so that a large amount of external light can be prevented from entering the lcd module and exiting after being reflected in the lcd module, and the lcd module can be prevented from forming a mirror effect to affect the display. In addition, the polarizer is set as a surface-treated polarizer in this embodiment, and the surface-treated polarizer has a rough surface, and external light forms diffuse reflection on the surface of the surface-treated polarizer 70, so that the effect of forming a mirror surface can be further prevented from affecting display.
Fig. 6 is a schematic structural diagram of another lcd module according to an embodiment of the present utility model, referring to fig. 6, in an alternative embodiment, the lcd module may further include a PDLC dimming box 80, where the PDLC dimming box 80 is located on the light emitting side of the lcd box 20, and is used to control the wide and narrow viewing angles of the images displayed by the lcd box 20 in cooperation with the viewing angle dimming box 30;
the PDLC dimming cell 80 includes a third substrate 81, a fourth substrate 82, and a polymer dispersed liquid crystal layer 83; the polymer dispersed liquid crystal layer 83 is located between the third substrate 81 and the fourth substrate 82;
a third transparent electrode 84 is provided on a side surface of the third substrate 81 facing the polymer dispersed liquid crystal layer 83, and a fourth transparent electrode 85 is provided on a side surface of the fourth substrate 82 facing the polymer dispersed liquid crystal layer 83;
the polymer dispersed liquid crystal layer 83 includes a polymer layer 831 and liquid crystal droplets 832, and the liquid crystal droplets 832 are distributed in the polymer layer 831.
Fig. 7 and 8 are schematic views of the lcd module shown in fig. 6 in a wide viewing angle mode and a narrow viewing angle mode, respectively, and referring to fig. 7 and 8, those skilled in the art can know that the PDLC dimming box 80 has a wide viewing angle mode and a narrow viewing angle mode under the control of loading an electric field on the third transparent electrode 84 and the fourth transparent electrode 85.
As shown in fig. 7, in the wide viewing angle mode, the third transparent electrode 84 and the fourth transparent electrode 85 are not subjected to an electric field, and the liquid crystal droplets 832 in the polymer dispersed liquid crystal layer 83 are arranged in a random manner. At this time, when the light emitted from the liquid crystal display box 20 passes through the polymer dispersed liquid crystal layer 83, the light is scattered by the liquid crystal droplets 832 which are scattered and arranged therein, so that the light with small or positive viewing angle passing through the composite metal layer 40 is scattered into the light with large viewing angle, and even if the light with large viewing angle is filtered by the composite metal layer 40, the light with large viewing angle can be scattered again by the PDLC light adjusting box 80, thereby meeting the requirement of displaying the picture with wide viewing angle.
As shown in fig. 8, in the narrow viewing angle mode, the third transparent electrode 84 and the fourth transparent electrode 85 are subjected to an electric field, and the liquid crystal droplets 832 in the polymer dispersed liquid crystal layer 83 are arranged regularly. At this time, the light emitted from the lcd 20 passes through the polymer dispersed liquid crystal layer 83, and then directly passes through the regularly arranged liquid crystal droplets 832, so as to keep the light emitted from the small viewing angle or the positive viewing angle, thereby ensuring the narrow viewing angle effect of the display panel.
In addition, the specific setting position of the PDLC dimming case 80 is not limited in the embodiment of the present utility model. As shown in fig. 5, an optional PDLC dimming box 80 is located on the light-exiting side of viewing angle dimming box 30 in one embodiment. Fig. 9 and 10 are schematic structural diagrams of two other lcd modules according to the embodiment of the present utility model, referring to fig. 9 and 10, it can be seen that, in other embodiments of the present utility model, a PDLC dimming cell 80 may be disposed between a viewing angle dimming cell 30 and a lcd cell 20 by comparing the lcd modules shown in fig. 6 with the lcd modules shown in fig. 9 and 10, wherein the lcd modules in the embodiments shown in fig. 9 and 10 are different in the disposition positions of the composite metal layer 40, and in the embodiment shown in fig. 9, the composite metal layer 40 is disposed in the lcd cell 20; in the embodiment shown in fig. 10, the composite metal layer 40 is disposed in the viewing angle regulating box 30.
Based on the structure of the liquid crystal display module, the embodiment of the utility model also provides a light-emitting brightness deducing process under a wide-narrow view angle mode so as to embody the light-emitting brightness distinction of the liquid crystal display module under two view angle modes. Fig. 11 is a schematic view showing light transmittance of the lcd module shown in fig. 10 in a wide-narrow viewing angle mode, fig. 12 is a graph showing transmittance of a viewing angle adjusting box according to a change of viewing angle, and the following deductions are performed on brightness of light emitted in two modes by referring to fig. 11 and 12 by using the lcd module structure shown in fig. 10:
in the wide viewing angle mode, the backlight passes through the liquid crystal display cell 20, then through the PDLC dimming cell 80, and then out through the viewing angle dimming cell 30. In general, the transmittance of the liquid crystal display cell 20 is less than 5%, and the transmittance of the viewing angle light-adjusting cell 30 in the wide viewing angle mode is as shown in fig. 12, and the transmittance of the PDLC light-adjusting cell 80 is 55% when the PDLC light-adjusting cell is not connected to high voltage, so I 1 ＝5％I 0 ，I 2 ＝55％I 1 Outgoing light I 3 ＝(1-T’)I 2 *T EQ ＝2.75％(1-T’)I 0 *T EQ The method comprises the steps of carrying out a first treatment on the surface of the Where T' is the reflectivity of the composite metal layer 40 at different angles of light under different materials, T EQ Is the transmittance of the viewing angle adjusting box 30 at different viewing angles.
In the narrow viewing angle mode, the transmittance of the PDLC dimming case 80 reaches 90%, so that the outgoing light brightness I d ＝(1-T’)I c *T EQ ＝4.5％(1-T’)I a *T EQ 。
Based on the same conception, the embodiment of the utility model also provides a liquid crystal display device. Fig. 13 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present utility model, and referring to fig. 13, the liquid crystal display device includes any one of the liquid crystal display modules 100 according to the above embodiment. In addition, since the display device 100 includes the lcd module provided by the embodiment of the present utility model, the lcd module provided by the embodiment of the present utility model has the same or similar beneficial effects, and will not be described herein. The liquid crystal display module can be display equipment such as a mobile phone, a tablet personal computer and the like.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A liquid crystal display module, comprising:
a backlight source for emitting backlight;
the liquid crystal display box is positioned at the light emitting side of the backlight source and is used for controlling the image display; the liquid crystal display box comprises a color film substrate, wherein the color film substrate comprises a color resistance layer and a black matrix, the color resistance layer comprises a plurality of mutually independent color resistances, and the black matrix is filled in gaps among the color resistances;
the visual angle dimming box is positioned on the light emitting side of the liquid crystal display box and is used for controlling the wide and narrow visual angles of images displayed by the liquid crystal display box;
the composite metal layer is arranged on the light emitting side of the liquid crystal display box, and comprises a metal pattern made of negative dielectric constant metal, and the metal pattern is overlapped with the projection of the pattern of the black matrix on the light emitting surface.
2. The liquid crystal display module of claim 1, wherein the composite metal layer is located in the viewing angle dimming box.
3. The liquid crystal display module according to claim 2, wherein the viewing angle adjusting box comprises a first substrate and a second substrate and a first liquid crystal layer between the first substrate and the second substrate; a first transparent electrode layer is arranged on one side of the first substrate facing the first liquid crystal layer, and a second transparent electrode layer is arranged on one side of the second substrate facing the first liquid crystal layer; the first substrate is positioned between the liquid crystal display box and the second substrate;
the composite metal layer is arranged between the first substrate and the first transparent electrode layer, and an insulating layer is arranged between the composite metal layer and the first transparent electrode layer.
4. The liquid crystal display module of claim 1, wherein the liquid crystal display cell further comprises an array substrate and a second liquid crystal layer positioned between the color film substrate and the array substrate, the array substrate being positioned between the second liquid crystal layer and the backlight;
the color resistance layer and the black matrix are formed on one side of the color film substrate, which is close to the second liquid crystal layer; the composite metal layer is positioned at one side of the color film substrate far away from the second liquid crystal layer.
5. The liquid crystal display module of claim 1, wherein the composite metal layer comprises a negative dielectric constant metal and silver, and the thickness ratio of the negative dielectric constant metal to silver is 5nm to 5nm or 5nm to 10nm.
6. The liquid crystal display module of claim 1, further comprising a PDLC dimming box located on a light emitting side of the liquid crystal display box for controlling a wide and narrow viewing angle of an image displayed by the liquid crystal display box in cooperation with the viewing angle dimming box;
the PDLC dimming box comprises a third substrate, a fourth substrate and a polymer dispersed liquid crystal layer; the polymer dispersed liquid crystal layer is positioned between the third substrate and the fourth substrate;
a third transparent electrode is arranged on one side surface of the third substrate facing the polymer dispersed liquid crystal layer, and a fourth transparent electrode is arranged on one side surface of the fourth substrate facing the polymer dispersed liquid crystal layer;
the polymer dispersed liquid crystal layer comprises a polymer layer and liquid crystal microdroplets, wherein the liquid crystal microdroplets are distributed in the polymer layer;
under the control of loading an electric field on the third transparent electrode and the fourth transparent electrode, the PDLC dimming box has a wide-viewing-angle mode and a narrow-viewing-angle mode;
in the wide viewing angle mode, the third transparent electrode and the fourth transparent electrode are not loaded with an electric field, and liquid crystal droplets in the polymer dispersed liquid crystal layer are in scattered arrangement;
in the narrow viewing angle mode, the third transparent electrode and the fourth transparent electrode are loaded with an electric field, and liquid crystal droplets in the polymer dispersed liquid crystal layer are regularly arranged.
7. The liquid crystal display module of claim 6, wherein the PDLC dimming box is located on a light exit side of the viewing angle dimming box or between the viewing angle dimming box and the liquid crystal display box.
8. The liquid crystal display module of claim 1, further comprising a louver film and a brightness enhancement film, the louver film and the brightness enhancement film being positioned between the backlight and the liquid crystal display cell, and the brightness enhancement film being positioned between the louver film and the backlight.
9. The liquid crystal display module of claim 1, further comprising a surface-treated polarizer disposed on a light-exiting side of the viewing angle light-adjusting box.
10. A liquid crystal display device comprising the liquid crystal display module according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526988.6U CN219891510U (en) | 2023-06-15 | 2023-06-15 | Liquid crystal display module and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526988.6U CN219891510U (en) | 2023-06-15 | 2023-06-15 | Liquid crystal display module and liquid crystal display device |
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| CN219891510U true CN219891510U (en) | 2023-10-24 |
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| CN202321526988.6U Active CN219891510U (en) | 2023-06-15 | 2023-06-15 | Liquid crystal display module and liquid crystal display device |
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| Country | Link |
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| CN (1) | CN219891510U (en) |
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