CN112327547B

CN112327547B - Display module and display device

Info

Publication number: CN112327547B
Application number: CN202011310058.8A
Authority: CN
Inventors: 钟圆圆; 蓝学新; 陈国照
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-10-11
Anticipated expiration: 2040-11-20
Also published as: CN112327547A

Abstract

The invention discloses a display module and a display device, wherein the display module comprises a display panel, the display panel comprises a color film substrate and an array substrate which are oppositely arranged, and a liquid crystal clamped between the color film substrate and the array substrate; the array substrate comprises a first electrode layer and a second electrode layer, the first electrode layer comprises a plurality of first electrode blocks, the second electrode layer comprises at least one second electrode block, and the first electrode and the second electrode blocks form a first electric field in a first direction so that liquid crystals deflect along the first direction; the color film substrate comprises a third electrode, the orthographic projection of the third electrode on the plane of the array substrate is at least partially overlapped with the orthographic projection of the second electrode block on the plane of the array substrate, and the third electrode and the second electrode block form a second electric field in a second direction, so that liquid crystal deflects from the first direction to the second direction. The invention utilizes the electric field formed between the third electrode and the second electrode block to adjust the visual angle of the display panel so as to realize peep prevention.

Description

Display module and display device

Technical Field

The invention relates to the technical field of display, in particular to a display module and a display device.

Background

With the advancement of science and technology, the security of information becomes more and more important, so that the security of data information is protected, and the risk of data leakage is reduced to the maximum extent.

With the advent of the internet and cloud computing era, various terminal devices and a large number of applications are continuously generated, more and more devices and applications are accessed into enterprises through the cloud, a larger amount of data is generated, and the original safety margin is broken through again. In view of the current information security threat situation and the emerging technology which comes out endlessly, people pay more and more attention to the security protection of data information, especially when the security is strong and private information is to be processed, so that more and more anti-peeping technologies are applied to the display.

At present, the viewing angle conversion technology integrated in the LCD is almost limited to the external hanging product, and cannot meet the requirement of the customer, so that the development of the integrated wide and narrow viewing angle LCD is urgent.

Disclosure of Invention

In view of this, the present invention provides a display module and a display device, in which an electric field formed between a third electrode and a second electrode is used to adjust a viewing angle of a display panel to achieve peep prevention.

On one hand, the display module provided by the invention comprises a display panel, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal clamped between the color film substrate and the array substrate, wherein the color film substrate and the array substrate are arranged oppositely; the array substrate comprises a first electrode layer and a second electrode layer, the first electrode layer comprises a plurality of first electrode blocks, the second electrode layer comprises at least one second electrode block, and the first electrode and the second electrode form a first electric field in a first direction so that the liquid crystal deflects along the first direction; the color film substrate comprises a third electrode, the orthographic projection of the third electrode on the plane of the array substrate is at least partially overlapped with the orthographic projection of the second electrode on the plane of the array substrate, and a second electric field in a second direction is formed by the third electrode and the second electrode, so that the liquid crystal is deflected from the first direction to the second direction; the first direction is parallel to the plane of the array substrate, and the second direction is perpendicular to the plane of the array substrate.

In another aspect, the display device provided by the present invention includes any one of the display modules provided by the present application.

Compared with the prior art, according to the display module and the display device provided by the invention, the orthographic projection of the third electrode on the plane of the array substrate is at least partially overlapped with the orthographic projection of the second electrode on the plane of the array substrate, and the third electrode and the second electrode form the second electric field in the second direction, so that the liquid crystal deflects from the first direction to the second direction, namely the deflection angle of the liquid crystal in the display panel is regulated and controlled by the third electrode, in-cell peep-proof display is realized, and the requirements of customers under different environments are met. In addition, the third electrode can be reused as a shading layer, so that the third electrode does not need to be manufactured independently, the process can be shortened, and the light and thin display module can be realized. Furthermore, the invention can also adopt a structure of inverting the array substrate and the color film substrate, and because the array substrate provided with the touch electrode is arranged at one side close to the light-emitting surface of the display panel, the interference of a third electrode to the touch electrode can be avoided, the touch sensitivity can be further improved, and the distance between the touch electrode P4 and a finger can be reduced, thereby further improving the touch sensitivity and realizing the integrated design of touch and peep prevention.

Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a display module according to the prior art;

fig. 2 is a schematic diagram illustrating a display module according to the present invention in a narrow viewing angle and dark state;

fig. 3 is a schematic diagram illustrating a display module according to the present invention under a narrow viewing angle bright state display;

fig. 4 is a schematic diagram of a display module according to the present invention under wide-viewing-angle bright-state display;

FIG. 5 is a schematic structural diagram of another display module according to the present invention;

FIG. 6 is a schematic structural diagram of another display module according to the present invention;

FIG. 7 is a schematic view of another display module according to the present invention;

FIG. 8 is a schematic structural diagram of another display module according to the present invention;

FIG. 9 is a schematic view of another display module according to the present invention;

FIG. 10 is a schematic view of another display module according to the present invention;

FIG. 11 is a schematic structural diagram of another display module according to the present invention;

fig. 12 is a schematic diagram of a display device according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display module in the prior art. The peep-proof display device 100 includes a peep-proof module 10, a display screen 20, and a peep-proof control module 30. The display screen 20 is sandwiched between the peep-proof module 10 and the peep-proof control module 30, the peep-proof module 10 can be directly applied to an existing wide-viewing-angle display, and can be conveniently and rapidly switched between a peep-proof state and a sharing state, and the peep-proof control module 30 controls the conductive electrodes of the corresponding peep-proof module 10 according to different driving signals, so that changes of different angles are realized. That is, in the prior art, the viewing angle conversion technology integrated in the display module 100 is almost limited to the plug-in product, and cannot meet the current demand of light and thin screen.

In order to solve the above technical problems, the present invention provides a display module and a display device. The display module and the display device provided by the invention are described in detail below.

In this embodiment, please refer to fig. 2 and fig. 3, in which fig. 2 is a schematic diagram of a display module according to the present invention under a narrow-viewing-angle dark state display, and fig. 3 is a schematic diagram of a display module according to the present invention under a narrow-viewing-angle bright state display. The display module 200 in this embodiment includes a display panel 1, where the display panel 1 includes a color film substrate 12 and an array substrate 11 that are arranged oppositely, and a liquid crystal 13 sandwiched between the color film substrate 12 and the array substrate 11; the array substrate 11 includes a first electrode layer P1 and a second electrode layer P2, the first electrode layer P1 includes a plurality of first electrode blocks P11, the second electrode layer P2 includes at least one second electrode block P21, and the first electrode blocks P11 and the second electrode blocks P21 form a first electric field E1 in a first direction X so that the liquid crystal 13 is deflected in the first direction X; the color filter substrate 12 includes a third electrode P3, an orthographic projection of the third electrode P3 on the plane of the array substrate 11 is at least partially overlapped with an orthographic projection of the second electrode block P21 on the plane of the array substrate 11, and the third electrode P3 and the second electrode block P21 form a second electric field E2 in the second direction Y, so that the liquid crystal is deflected from the first direction X to the second direction Y; the first direction X is a direction parallel to the plane of the array substrate 11, and the second direction Y is a direction perpendicular to the plane of the array substrate 11.

In the present invention, no specific requirement is made on the number and size of the third electrodes P3, as long as the third electrodes are located on the color film substrate 12 and form an electric field in the vertical direction with the second electrode block P21, that is, the second electric field E2 deflects the liquid crystal toward the second direction Y to achieve peep prevention, which is not described in detail below.

It can be understood that fig. 2 and 3 only show that the first electrode layer P1 includes 7 first electrode blocks P11, and the second electrode layer P2 includes one second electrode block P21, that is, the second electrode block P21 is a planar electrode, and the number of the first electrode blocks P11 and the second electrode blocks P21 is not specifically required in the present invention, and may be set according to actual situations, and will not be described again below. The array substrate 11 includes a first electrode layer P1 and a second electrode layer P2, the first electrode layer P1 includes a plurality of first electrode blocks P11, the second electrode layer P2 includes at least one second electrode block P21, and the first electrode blocks P11 and the second electrode blocks P21 form a first electric field E1 in a first direction X. Since the first and second electrode blocks P11 and P21 are positioned at one side of the liquid crystal 13, the first electric field E1 is a horizontal electric field. As shown in fig. 2, when no voltage is applied to the first electrode block P11 and the second electrode block P21, the liquid crystal 13 is not subjected to the force of the first electric field E1 and is not deflected in the first direction X. At this time, a voltage is applied to the third electrode P3, which may cause a voltage difference between the third electrode P3 and the second electrode block P21, and the third electrode P3 is located on the color filter substrate 12, that is, the third electrode P3 and the second electrode block P21 are respectively located at two sides of the liquid crystal 13, so that the third electrode P3 and the second electrode block P21 form a second electric field E2 in the second direction Y, and the second electric field E2 is a vertical electric field. When the liquid crystal 13 at and near the position of the third electrode P3 is acted by the second electric field E2, the liquid crystal 13 deflects from the first direction X to the second direction Y, and a certain amount of light leakage occurs, which is a dark state. As shown in fig. 3, when a voltage is applied to the first electrode block P11 and the second electrode block P21, the liquid crystal 13 is biased in the first direction X by the force of the first electric field E1, and further when a voltage is applied to the first electrode block P11 and the second electrode block P21, a voltage is applied to the third electrode P3, so that the liquid crystal 13 is biased in the first direction X except the force of the first electric field E1 in the horizontal direction, and is also biased in the second direction Y from the first direction X by the force of the second electric field E2 in the vertical direction, which is a bright state. In side view, human eyes receive light transmitted from the display panel 1 due to the liquid crystal 13 deflecting towards the second direction Y, so that the contrast between a bright state and a dark state of the display panel 1 is reduced, the viewing angle of the display panel is reduced, and the peep-proof effect is achieved. Meanwhile, the third electrode P3 is located on the color film substrate, and the third electrode is further used for adjusting the deflection degree of the liquid crystal 13 in the display panel 1 in the second direction Y, so that in-cell peep-proof display is realized, and the requirements of customers under different environments are met. Optionally, an insulating layer 111 is disposed between the first electrode layer P1 and the second electrode layer P2, so as to prevent other problems such as short circuit of the first electrode layer P1 and the second electrode layer P2, and no specific requirement is made on the material of the insulating layer 111, which may be an organic material or an inorganic material, and the insulating layer may be specifically set according to actual conditions, and is not described in detail below.

In some optional embodiments, with reference to fig. 3 and 4, fig. 4 is a schematic diagram of a display module according to the present invention in a wide-viewing-angle bright state display. The display module 200 provided in this embodiment includes a first display mode and a second display mode; a first display mode: applying a first voltage to the third electrode P3, the third electrode P3 and the second electrode block P21 form a second electric field E2 in a second direction, so that the liquid crystal 13 is deflected from the first direction X to the second direction Y, and an included angle between the liquid crystal 13 and the first direction X is a first angle θ 1; a second display mode: the third electrode P3 does not apply the first voltage, and the liquid crystal 13 forms a second angle (not shown) with the first direction X; wherein the first angle θ 1 is larger than the second angle (not shown).

It can be understood that fig. 3 is a first display mode, the first display mode is a narrow viewing angle bright state mode, i.e. a peep-proof mode, a first voltage is applied to the third electrode P3, the third electrode P3 and the second electrode block P21 form a second electric field E2 in a second direction, so that the liquid crystal 13 is subjected to a force in a vertical direction, the liquid crystal 13 at and near the position opposite to the third electrode P3 is deflected from the first direction X to the second direction Y, and an included angle between the part of the liquid crystal 13 and the first direction X is a first angle θ 1;

in the narrow viewing angle dark state, the liquid crystal 13 is also deflected from the first direction X to the second direction Y as in the bright state, and generates a corresponding first angle θ 1, which is not described herein again. Fig. 4 is a second display mode, which is a wide-viewing-angle bright-state mode, i.e. a normal mode, in which the first voltage is not applied to the third electrode P3, the liquid crystal 13 is only subjected to the force of the first electric field E1 formed between the first electrode block P11 and the second electrode block P21, i.e. the liquid crystal 13 is only subjected to the force in the horizontal direction, and the included angle between the liquid crystal 13 and the first direction X is a second angle (not shown in the figure), wherein since the liquid crystal 13 is not subjected to the force in the vertical direction, the liquid crystal 13 only forms a deflection in the first direction X and does not form a deflection in the second direction Y, and further the second angle (not shown in the figure) can be understood as 0 degree. In the wide viewing angle dark state, the liquid crystal 13 is only subjected to the force in the horizontal direction, and the included angle between the liquid crystal 13 and the first direction X is the second angle, which is not described herein again. Since the first angle θ 1 is greater than the second angle (not shown in the figure), light leakage is generated in the first display mode, that is, the contrast ratio between the bright state and the dark state of the first display mode is reduced relative to the contrast ratio between the bright state and the dark state of the second display mode, so that the viewing angle of the display panel is reduced, and the peep-proof effect is realized.

In some optional embodiments, referring to fig. 5, fig. 5 is a schematic structural diagram of another display module provided by the present invention. The display module 200 provided in this embodiment includes a backlight module 14, the backlight module 14 is located at a side far from the light-emitting surface Q of the display panel 1, and the color film substrate 12 is located between the backlight module 14 and the array substrate 11.

It is understood that fig. 5 only illustrates the bright state with a narrow viewing angle, and for clarity, only a portion of the first electric field E1 and the second electric field E2 are illustrated in fig. 5, so as to illustrate the first electric field E1 and the second electric field E2. In the display module 200 provided in this embodiment, the array substrate 11 and the color filter substrate 12 are inverted, that is, the array substrate 11 is close to one side of the light-emitting surface Q of the display module 200, the array substrate 11 includes a first electrode layer P1 and a second electrode layer P2, the first electrode layer P1 includes a plurality of first electrode blocks P11, the second electrode layer P2 includes at least one second electrode block P21, and the first electrode block P11 and the second electrode block P21 form a first electric field E1 in a first direction X, so that the liquid crystal 13 deflects along the first direction X; the color filter substrate 12 includes a third electrode P3, an orthogonal projection of the third electrode P3 on the plane of the array substrate 11 at least partially overlaps an orthogonal projection of the second electrode block P21 on the plane of the array substrate 11, and the third electrode P3 and the second electrode block P21 form a second electric field E2 in the second direction Y, so that the liquid crystal is deflected from the first direction X toward the second direction Y. The principle of implementing peep prevention when the array substrate 11 and the color filter substrate 12 are inverted in this embodiment is the same as that when the array substrate 11 and the color filter substrate 12 are placed upright, and details are not repeated here.

In some optional embodiments, referring to fig. 6, fig. 6 is a schematic structural diagram of another display module provided by the present invention. Fig. 6 illustrates only a narrow viewing angle bright state, and for clarity, only a portion of the first electric field E1 and the second electric field E2 are illustrated in fig. 6. The display module 200 provided in this embodiment includes a backlight module 14, the backlight module 14 is located at a side far from the light emitting surface Q of the display panel 1, and the color film substrate 12 is located between the backlight module 14 and the array substrate 11. The array substrate 11 further includes a touch electrode P4, and the second electrode block P2 is reused as the touch electrode P4.

It can be understood that the color filter substrate 12 is located between the backlight module 14 and the array substrate 11 in this embodiment, that is, the color filter substrate 12 and the array substrate 11 are inverted in this embodiment. Under the condition that the color film substrate 12 and the array substrate 11 are arranged in the right position, if the third electrode P3 is added on the side of the color film substrate 12 to realize the peep-proof function, and the electrodes are multiplexed on the side of the array substrate 11 to realize the touch control function, then the touch control electrode will be affected by the second electric field formed by the third electrode P3 when realizing the touch control function, that is, the signal of the touch control electrode is interfered, and the touch control function of the touch control electrode will be affected. Therefore, in the present embodiment, the array substrate 11 with the touch electrode P4 is disposed at a side close to the light emitting surface Q of the display panel 1, that is, under the condition that the color film substrate 12 and the array substrate 11 are inverted, the interference of the third electrode P3 to the touch electrode P4 can be avoided, and the touch sensitivity can be further improved. Meanwhile, the touch electrode P4 is located on one side of the array substrate 11 close to the light emitting surface Q, so that the distance between the touch electrode P4 and the finger can be reduced, and the touch sensitivity can be further improved. Further, in the embodiment, the second electrode block P2 is reused as the touch electrode P4, i.e., the touch electrode P4 does not need a separate process, so that the process flow can be simplified, and the display module 200 can be thinned.

The touch electrode P4 of the present invention may be an electrode disposed on the array substrate 11 away from the color film substrate 12, and the film structure of the touch electrode P4 of the present invention is not specifically required, and may be disposed according to actual conditions.

In some optional embodiments, with reference to fig. 6, in the backlight module 200 provided in this embodiment, the third electrode P3 is a transparent electrode.

It can be understood that the third electrode P3 can be a transparent electrode, and due to the high transmittance of the transparent electrode, the third electrode can be prevented from affecting the light transmittance of the display module 200, and the display quality of the display module can be ensured. Optionally, the transparent electrode may be made of indium tin oxide, which has the characteristics of high transmittance, good conductivity, and the like. The material of the third electrode P3 is not specifically required, and the third electrode may be other transparent electrodes, and is set according to actual situations, which is not described in detail below.

In some alternative embodiments, as shown in fig. 6, the third electrode P3 of the backlight module 200 provided in this embodiment includes a plurality of sub-electrodes P31.

It can be understood that the third electrode P3 may include a plurality of sub-electrodes P31, and further, the relative position and a portion of liquid crystal near the sub-electrodes P31 may be controlled by the sub-electrodes P31, that is, the sub-electrodes P31 and the second electrode block P21 form a second electric field E2 in the second direction Y, and the second electric field E2 is a vertical electric field, so that the liquid crystal 13 in the corresponding position of the sub-electrodes P31 is deflected along the first direction X by the force of the first electric field E1 in the horizontal direction, and is deflected towards the second direction Y by the force of the second electric field E2 in the vertical direction, and human eyes may receive light transmitted from the display panel 1 due to the deflection of the liquid crystal 13 towards the second direction Y in side view, at this time, the contrast of the bright state and the dark state of the display panel 1 decreases, and further the viewing angle of a portion of the display panel becomes smaller, thereby achieving the anti-peeping effect.

The position of the sub-electrode P31 is not specifically required, and can be set according to actual conditions. When the transparent electrode is a transparent electrode, the sub-electrode P31 may be located at any position of the color filter substrate 12, and when the non-transparent electrode is a non-transparent electrode, the orthographic projection of the sub-electrode P31 on the array substrate 11 may be located within the orthographic projection of the black matrix or other non-transparent element on the array substrate 11, so as to prevent the aperture opening ratio of the display module from being reduced.

In some optional embodiments, referring to fig. 7, fig. 7 is a schematic structural diagram of another display module provided by the present invention. Fig. 7 illustrates only a narrow viewing angle bright state, and for clarity, only a portion of the first electric field E1 and the second electric field E2 are illustrated in fig. 7. The third electrode P3 in the display module 200 provided in this embodiment is a surface electrode.

It can be understood that the third electrode P3 may be a surface electrode, and the third electrode P3 is designed in a whole layer in a non-discontinuous manner, that is, the orthographic projection of the third electrode P3 on the color filter substrate 12 covers the orthographic projection of the liquid crystal 13 on the color filter substrate 12, so that the third electrode P3 and the second electrode block P21 form a second electric field E2 in the second direction Y, and the second electric field E2 is a vertical electric field, so that all the liquid crystals 13 except the force of the first electric field E1 in the horizontal direction deflect along the first direction X, and the force of the second electric field E2 in the vertical direction deflects toward the second direction Y, and a human eye receives light rays emitted from the display panel 1 due to the deflection of the liquid crystals 13 toward the second direction Y in a side view, at this time, the contrast of the bright state and the dark state of the display panel 1 decreases, thereby reducing the viewing angle of the entire display panel, and achieving the function of preventing peeping.

In some optional embodiments, referring to fig. 8 and 9, fig. 8 is a schematic structural view of another display module provided by the present invention, and fig. 9 is a schematic structural view of another display module provided by the present invention. Fig. 8 and 9 only illustrate the narrow viewing angle bright state, and for clarity, only a portion of the first electric field E1 and the second electric field E2 are illustrated in fig. 8 and 9, respectively. In the backlight module 200 provided in this embodiment, the color film substrate 12 further includes a light-shielding layer BM, and the third electrode P3 multiplexes the light-shielding layer BM.

Referring to fig. 8, fig. 8 shows a situation when the color filter substrate 12 and the array substrate 11 are aligned, that is, the color filter substrate 12 is located on one side of the light emitting surface of the display module 200, the color filter substrate 12 includes a color resist layer 121, and the light shielding layer BM is disposed around the color resist layer 121 and is used for preventing the color resist layer 121 from generating problems such as color mixing. In the invention, the third electrode P3 is used for multiplexing the light-shielding layer BM, and the third electrode P3 does not need to be manufactured separately, so that the process can be shortened, and the light and thin display module 200 can be realized. Furthermore, the third electrode P3 is reused as the light-shielding layer BM, and the third electrode P3 equivalently includes a plurality of sub-electrode blocks P31, so that the liquid crystal 13 correspondingly disposed on the sub-electrode P31 is deflected along the first direction X by the force of the first electric field E1 in the horizontal direction, and the force of the second electric field E2 in the vertical direction is deflected toward the second direction Y, so that the human eye can receive the light transmitted from the display panel 1 by the deflection of the liquid crystal 13 toward the second direction Y in the side view, and the contrast of the bright state and the dark state of the display panel 1 is reduced at this time, thereby reducing the viewing angle of part of the display panel and realizing the function of peeping prevention; furthermore, since the third electrode P3 is multiplexed with the light-shielding layer BM, the area of the third electrode of the multiplexed light-shielding layer BM is small, and the electric field generated thereby is small, if the touch electrode P4 is multiplexed with the second electrode block P21 at this time, the influence on the touch function is also small, and the touch-control and peep-prevention integration with high sensitivity can be realized.

Referring to fig. 9, fig. 9 is a situation when the color filter substrate 12 and the array substrate 11 are inverted, that is, the array substrate 11 is located on one side of the light emitting surface of the display module 200, the color filter substrate 12 includes a color resist layer 121, and the light shielding layer BM is disposed around the color resist layer 121 and is used for preventing the color resist layer 121 from generating problems such as color mixing. In the invention, the third electrode P3 is reused by the light-shielding layer BM, and the third electrode P3 does not need to be manufactured separately, so that the process can be shortened, and the display module 200 can be thinned. Furthermore, the third electrode P3 is reused as the light-shielding layer BM, and the third electrode P3 equivalently includes a plurality of sub-electrode blocks P31, so that the liquid crystal 13 correspondingly disposed on the sub-electrode P31 is deflected along the first direction X except the force of the first electric field E1 in the horizontal direction, and meanwhile, the force of the second electric field E2 in the vertical direction is deflected along the second direction Y, so that the human eye can receive the light transmitted from the display panel 1 due to the deflection of the liquid crystal 13 in the second direction Y in the side view, and at this time, the contrast between the bright state and the dark state of the display panel 1 is reduced, thereby reducing the viewing angle of part of the display panel and realizing the anti-peeping effect; furthermore, the third electrode P3 is multiplexed with the light-shielding layer BM, the area of the third electrode multiplexed with the light-shielding layer BM is small, and the electric field generated thereby is small, so that if the touch electrode P4 is multiplexed as the second electrode block P21, the influence on the touch function is small, and the high-sensitivity touch-control and peep-prevention integration can be realized. And the touch electrode P4 is located on one side of the array substrate 11 close to the light emitting surface Q, so that the distance between the touch electrode P4 and the finger can be reduced, and the touch sensitivity can be further improved.

When the third electrode P3 multiplexes the light-shielding layer BM, the present invention does not require the position relationship between the array substrate 11 and the color film substrate 12 in the display module, and may be set according to the actual situation, which is not described in detail below.

In some optional embodiments, with continued reference to fig. 8 and fig. 9, the color film substrate 12 in the backlight module 200 provided in this embodiment further includes a light-shielding layer BM, and the third electrode P3 is multiplexed as the light-shielding layer BM. The material of the third electrode P3 is a black conductive material.

It can be understood that the material of the third electrode P3 is a black conductive material, which can block light, prevent the color mixing of the color resist layer 121, and so on, i.e., realize the function of the light shielding layer BM. The light shielding layer BM is provided to have both the conductive and light shielding functions, thereby facilitating shortening of the process and realizing the light and thin structure of the display module 200.

Optionally, the black conductive material includes a black metal, a mixture of black metals, or other black materials that can be used as electrodes. The black conductive material can not only realize the effect of generating an electric field when the third electrode P3 is electrified, but also realize the effect of blocking light. The invention does not require the specific material of the black conductive material, and can be ferrous metal or ferrous metal mixture, etc., and the specific setting is not repeated below according to the actual situation.

In some alternative embodiments, as shown in fig. 2 and fig. 5, in the backlight module 200 provided in this embodiment, the first electrode block P11 is a pixel electrode, and the second electrode block P21 is a common electrode.

It can be understood that an orthographic projection of the first electrode block P11 on the plane of the array substrate 11 at least partially overlaps with an orthographic projection of the second electrode block P21 on the plane of the array substrate 11, so that an electric field can be generated between the first electrode block P11 and the second electrode block P21 to deflect the liquid crystal. Further, since the first electrode block P11 and the second electrode block P21 are located at one side of the liquid crystal 13, the first electric field E1 is a horizontal electric field. As shown in fig. 2, when no voltage is applied to the first electrode block P11 and the second electrode block P21, the liquid crystal 13 is not subjected to the force of the first electric field E1 and is not deflected in the first direction X. At this time, a voltage is applied to the third electrode P3, which may cause a voltage difference between the third electrode P3 and the second electrode block P21, and the third electrode P3 is located on the color filter substrate 12, that is, the third electrode P3 and the second electrode block P21 are respectively located at two sides of the liquid crystal 13, so that the third electrode P3 and the second electrode block P21 form a second electric field E2 in the second direction Y, and the second electric field E2 is a vertical electric field. When the liquid crystal 13 at and near the position of the third electrode P3 is acted by the second electric field E2, the liquid crystal 13 deflects from the first direction X to the second direction Y, and a certain amount of light leakage occurs, which is a dark state. As shown in fig. 3, when a voltage is applied to the first electrode block P11 and the second electrode block P21, the liquid crystal 13 is biased in the first direction X by the force of the first electric field E1, and further when a voltage is applied to the first electrode block P11 and the second electrode block P21, a voltage is applied to the third electrode P3, so that the liquid crystal 13 is biased in the first direction X except the force of the first electric field E1 in the horizontal direction, and is also biased in the second direction Y from the first direction X by the force of the second electric field E2 in the vertical direction, which is a bright state. In a side view, human eyes receive light transmitted from the display panel 1 due to the liquid crystal 13 deflecting towards the second direction Y, so that the contrast of the bright state and the dark state of the display panel 1 is reduced, the viewing angle of the display panel is reduced, and the peep-proof effect is realized. Meanwhile, the third electrode P3 in the present application is located on the color film substrate, and then the third electrode is used to adjust the deflection degree of the liquid crystal 13 in the display panel 1 in the second direction Y, so as to implement in-cell peep-proof display, and meet the requirements of customers in different environments.

In some optional embodiments, with reference to fig. 2, the color filter substrate 12 in the display module 200 provided in this embodiment includes a first substrate 00, and the third electrode P3 is formed on the first substrate 00 through a halftone mask.

It should be understood that fig. 2 only illustrates that the third electrode P3 is directly formed on the upper surface of the first substrate 00 through a halftone mask, of course, the color filter substrate 12 may include other film layers, and the third electrode P3 is directly formed on the other film layers of the color filter substrate 12 through the halftone mask, that is, the third electrode P3 is formed above the spatial position of the first substrate 00 through the halftone mask. The specific film layer on which the third electrode P is formed is not specifically required in the present invention, and the third electrode P only needs to be formed on one side of the color film substrate 12, and may be specifically configured according to actual conditions, which is not described in detail below.

In some optional embodiments, referring to fig. 10 and 11, fig. 10 is a schematic structural view of another display module provided by the present invention, and fig. 11 is a schematic structural view of another display module provided by the present invention. The display module provided in this embodiment may include a touch electrode layer P4, where the touch electrode layer P4 is located on a side of the display panel 1 close to the light exit surface, that is, the touch electrode layer P4 adopts an external hanging structure. Fig. 10 and 11 are only examples in which the touch electrode P4 in the display module 200 is externally hung, and the principle of the electric field force applied to the liquid crystal 13 is as shown in the above embodiments, and is not repeated herein. Fig. 10 only illustrates the color filter substrate 12 and the array substrate 11 when they are placed right, that is, the color filter substrate 12 is located on the light emitting surface of the display module 200. Fig. 11 only illustrates the case where the color filter substrate 12 and the array substrate 11 are inverted, that is, the array substrate 11 is located on the light emitting surface side of the display module 200. The touch electrode layer P4 is suitable for the scheme no matter in an external hanging mode or a built-in mode, namely the position of the touch electrode layer P4 is not specifically required, and the touch electrode layer P4 can be set according to actual conditions.

The present invention further provides a display device 300 including the display module 200 according to any of the above embodiments of the present invention. Referring to fig. 12, fig. 12 is a schematic view of a display device according to the present invention. Fig. 12 shows a display device 300 including the display module 200 according to any of the embodiments of the invention. The embodiment of fig. 12 is only an example of a mobile phone, and the display device 300 is described, it is to be understood that the display device 300 provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display module provided in the embodiment of the present invention, and specific reference is specifically made to the specific description of the display device in each of the above embodiments, which is not repeated herein.

According to the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:

compared with the prior art, in the display module and the display device provided by the invention, the orthographic projection of the third electrode on the plane of the array substrate is at least partially overlapped with the orthographic projection of the second electrode on the plane of the array substrate, and the third electrode and the second electrode form a second electric field in the second direction, so that the liquid crystal is deflected from the first direction to the second direction, namely the deflection angle of the liquid crystal in the display panel is regulated and controlled by the third electrode, in-cell peep-proof display is realized, and the requirements of customers under different environments are met. In addition, the third electrode can be reused as a shading layer, so that the third electrode does not need to be manufactured independently, the process can be shortened, and the light and thin display module can be realized. Furthermore, the invention can also adopt a structure of inverting the array substrate and the color film substrate, and because the array substrate provided with the touch electrode is arranged on one side close to the light-emitting surface of the display panel, the interference of a third electrode to the touch electrode can be avoided, the touch sensitivity can be further improved, and the distance between the touch electrode P4 and a finger can be reduced, so that the touch sensitivity can be further improved, and the integrated design of touch peep prevention can be realized.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The display module is characterized by comprising a display panel, wherein the display panel comprises a color film substrate, an array substrate and a liquid crystal clamped between the color film substrate and the array substrate, wherein the color film substrate and the array substrate are arranged oppositely;

the array substrate comprises a first electrode layer and a second electrode layer, wherein the first electrode layer comprises a plurality of first electrode blocks, the second electrode layer comprises at least one second electrode block, and the first electrode blocks and the second electrode blocks form a first electric field in a first direction so that the liquid crystal is deflected along the first direction;

the color film substrate comprises a third electrode, the orthographic projection of the third electrode on the plane of the array substrate is at least partially overlapped with the orthographic projection of the second electrode block on the plane of the array substrate, and the third electrode and the second electrode block form a second electric field in a second direction, so that the liquid crystal deflects from the first direction to the second direction;

the first direction is parallel to the plane of the array substrate, and the second direction is perpendicular to the plane of the array substrate;

the display module comprises a backlight module; the backlight module is positioned on one side far away from the light-emitting surface of the display panel, and the color film substrate is positioned between the backlight module and the array substrate;

the array substrate further comprises a touch electrode, and the second electrode block is reused as the touch electrode;

the color film substrate further comprises a shading layer, and the third electrode multiplexes the shading layer.

2. The display module of claim 1, comprising a first display mode and a second display mode;

the first display mode: applying a first voltage to the third electrode, wherein the third electrode and the second electrode block form a second electric field in a second direction, so that the liquid crystal is deflected from the first direction to the second direction, and the included angle between the liquid crystal and the first direction is a first angle;

the second display mode: the third electrode is not applied with the first voltage, and the included angle between the liquid crystal and the first direction is a second angle;

wherein the first angle is greater than the second angle.

3. The display module according to claim 1, wherein the third electrode is a transparent electrode.

4. The display module of claim 1, wherein the third electrode comprises a plurality of sub-electrodes.

5. The display module of claim 1, wherein the third electrode is a face electrode.

6. The display module of claim 1, wherein the material of the third electrode is a black conductive material.

7. The display module of claim 6, wherein the black conductive material comprises a black metal or a mixture of black metals.

8. The display module according to claim 1, wherein the first electrode block is a pixel electrode and the second electrode block is a common electrode.

9. The display module according to claim 1, wherein the color filter substrate comprises a first substrate, and the third electrode is formed on the first substrate through a halftone mask.

10. A display device, comprising the display module set of any one of claims 1 to 9.