Method for fabricating a view control panel and a view control display screen

Abstract

This invention provides a method for fabricating a viewing angle control panel and a viewing angle control display screen. The method for fabricating the viewing angle control panel includes the following steps: S1. Depositing a transparent conductive material on a first substrate to form a first control panel; S2. Adding a photoaligning agent to liquid crystal and mixing to form a liquid crystal mixture; S3. Coating the liquid crystal mixture onto the transparent conductive material of the first control panel to form a mixed liquid crystal panel; S4. Irradiating the liquid crystal mixture of the mixed liquid crystal panel with ultraviolet light to form an oriented liquid crystal panel; S5. Depositing the transparent conductive material on a second substrate to form a second control panel; S6. Superimposing the second control panel onto the oriented liquid crystal panel to form a viewing angle control panel. This viewing angle control panel has better privacy protection, simplifies the fabrication process, has a simple structure, and can realize viewing angle switching functions such as wide viewing angle, single narrow viewing angle, partial narrow viewing angle, and multiple narrow viewing angles.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and in particular to a viewing angle control panel and a viewing angle control display screen that uses the viewing angle control panel to switch between wide and narrow viewing angles. Background Technology

[0002] Currently, HVA Dual Cell technology struggles to achieve one-way privacy protection. However, in certain situations, such as when couples are watching videos together on a high-speed train and don't want strangers to see them, one-way privacy protection is necessary. Similarly, when driving, if the passenger can play videos on the in-car infotainment screen without the driver being able to see the content and maintain focus, one-way privacy protection is also required.

[0003] While existing technologies attempt to achieve dual-view privacy by dividing a privacy dimming layer into left and right dimming layers, or by stacking two unidirectional privacy dimming layers for bidirectional privacy, these technologies suffer from uneven contrast distribution in the screen display and increased monitor thickness, affecting image quality and monitor compactness. Furthermore, most existing technologies provide uniform control over the entire privacy dimming layer, failing to achieve localized privacy. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method for manufacturing a viewing angle control panel, which has better privacy protection, simplifies the manufacturing process, has a simple structure, and can realize the viewing angle switching function of wide viewing angle, single narrow viewing angle, local narrow viewing angle and multiple narrow viewing angle.

[0005] The present invention provides a method for manufacturing a viewing control panel, comprising the following steps:

[0006] S1. A transparent conductive material is disposed on a first substrate to form a first control board;

[0007] S2. A photoaligning agent is added to the liquid crystal and mixed to form a liquid crystal mixture;

[0008] S3. Coat the liquid crystal mixture onto the transparent conductive material of the first control board to form a mixed liquid crystal panel;

[0009] S4. Irradiate the first type of liquid crystal and the second type of liquid crystal in the liquid crystal mixture of the mixed liquid crystal panel with ultraviolet light to form an oriented liquid crystal panel;

[0010] S5. The transparent conductive material is disposed on the second substrate to form a second control board;

[0011] S6. The second control board is superimposed on the directional liquid crystal panel to form a viewing angle control panel.

[0012] In one embodiment, the liquid crystal includes a first type of liquid crystal and a second type of liquid crystal, and the liquid crystal mixture of the mixed liquid crystal panel is irradiated with ultraviolet light to form an oriented liquid crystal panel.

[0013] In one embodiment, S4 includes: disposing an ultraviolet light blocking block on the second type of liquid crystal in the liquid crystal mixture, irradiating the liquid crystal with first ultraviolet light to cause the first type of liquid crystal therein to generate a first orientation, wherein the optical axis of the first ultraviolet light forms a first angle with the first substrate.

[0014] In one embodiment, S4 further includes: disposing an ultraviolet light blocking block on the first type of liquid crystal in the liquid crystal mixture, irradiating the liquid crystal with second ultraviolet light to cause the second type of liquid crystal therein to generate a second orientation, wherein the optical axis of the second ultraviolet light forms a second angle with the first substrate.

[0015] In one embodiment, the liquid crystal further includes a third type of liquid crystal and a fourth type of liquid crystal, wherein the third type of liquid crystal and the fourth type of liquid crystal in the liquid crystal mixture of the mixed liquid crystal panel are irradiated sequentially with ultraviolet light.

[0016] In one embodiment, S4 further includes: setting the ultraviolet light blocking block on the fourth type of liquid crystal in the liquid crystal mixture, irradiating the liquid crystal with third ultraviolet light to cause the third type of liquid crystal therein to generate a third orientation, wherein the optical axis of the third ultraviolet light forms a third angle with the first substrate, and / or setting the ultraviolet light blocking block on the third type of liquid crystal in the liquid crystal mixture, irradiating the liquid crystal with fourth ultraviolet light to cause the fourth type of liquid crystal therein to generate a fourth orientation, wherein the optical axis of the fourth ultraviolet light forms a fourth angle with the first substrate.

[0017] In one embodiment, S1 includes: depositing the transparent conductive material onto the entire surface of the first substrate, and then etching the transparent conductive material on the first substrate to form a plurality of first viewing angle control electrodes.

[0018] In one embodiment, S5 includes: depositing the transparent conductive material onto the entire surface of the second substrate, and then etching the transparent conductive material on the second substrate to form a plurality of second viewing angle control electrodes.

[0019] In one embodiment, S6 includes: disposing the second viewing angle control electrode of the second substrate on the side of the liquid crystal away from the first viewing angle control electrode, wherein the second viewing angle control electrode is opposite to and offset from the first viewing angle control electrode.

[0020] The present invention also provides a viewing angle control display screen, including a display panel and a viewing angle control panel prepared by the above-described method, wherein the viewing angle control panel is disposed on the light-emitting side of the display panel.

[0021] The viewing angle control panel provided by this invention, by adding a photoaligning agent to the liquid crystal and applying ultraviolet light irradiation, utilizes the interaction force of the photoaligning agent molecules to cause the liquid crystal to form different orientations in the liquid crystal mixture, thus obtaining a bidirectional viewing angle control panel with two viewing angle privacy features. The liquid crystal molecules with two orientations exist in the same viewing angle control panel, simplifying the process and avoiding the increased display thickness caused by stacking two unidirectional viewing angle control panels. This invention also provides a viewing angle control display screen with more than two viewing angle directions, such as a four-way viewing angle control display screen. The liquid crystal can be set to four different orientations, allowing the liquid crystal molecules with four orientations to exist in the same viewing angle control panel. Corresponding viewing angle control electrodes are set according to specific orientations to achieve independent control of the liquid crystal molecules with different orientations. Alternatively, a second viewing angle control panel can be superimposed on the bidirectional viewing angle control display screen, with the optical axis of the emitted light perpendicular to the optical axis of the emitted light from the first viewing angle control panel. Furthermore, the viewing angle control panel of this invention preferably uses polymer-stabilized liquid crystal, which not only allows for reversible switching between transparent and opaque states under the action of an electric field, but also has a lower threshold voltage due to the lower polymer content of the polymer-stabilized liquid crystal, resulting in lower contrast of the display screen at the privacy viewing angle in the privacy state. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the two-way viewing control panel structure in the first embodiment of the present invention.

[0024] Figure 2 for Figure 1 A schematic diagram of the first control board structure that has not been etched.

[0025] Figure 3 for Figure 1 A schematic diagram of the first control board structure that has already been etched.

[0026] Figure 4 for Figure 1 A schematic diagram of the structure after a planarization layer is applied to the etched first control board.

[0027] Figure 5 for Figure 1 A schematic diagram of the structure of a hybrid liquid crystal panel.

[0028] Figure 6 for Figure 1 A schematic diagram of the orientation process of the first directional liquid crystal in a hybrid liquid crystal panel.

[0029] Figure 7 for Figure 1 A schematic diagram of the orientation process of the second pointing liquid crystal in a hybrid liquid crystal panel.

[0030] Figure 8 This is a plan view of the view control electrode arrangement of the four-way view control panel in the second embodiment of the present invention.

[0031] Figure 9 for Figure 8 A three-dimensional schematic diagram of the orientation process of the third-pointing liquid crystal in a hybrid liquid crystal panel.

[0032] Figure 10 for Figure 8 A three-dimensional schematic diagram of the orientation process of the fourth-pointing liquid crystal in a hybrid liquid crystal panel.

[0033] Figure 11 This is a schematic diagram of a bidirectional narrow viewing angle of a bidirectional display screen in the viewing angle control display screen of the third embodiment of the present invention.

[0034] Figure 12 for Figure 11 A schematic diagram of the unidirectional narrow viewing angle structure of a medium viewing angle control display screen.

[0035] Figure 13 for Figure 11 A schematic diagram of the wide-viewing-angle structure of the medium-viewing-angle control display screen.

[0036] Figure 14 for Figure 11 A schematic diagram of the partial privacy protection structure of the medium-view control display screen.

[0037] Figure 15 for Figure 11 A schematic diagram simulating the effect of the medium-angle control display screen from various viewing angles.

[0038] Figure 16 This is a three-dimensional schematic diagram of the first four-way viewing control panel in the fourth embodiment of the present invention.

[0039] Figure 17 for Figure 16 A plan view of the first four-way perspective control panel.

[0040] Figure 18 This is a three-dimensional schematic diagram of the second four-way viewing control panel in the fifth embodiment of the present invention. Detailed Implementation

[0041] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0042] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0043] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0044] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0045] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0046] First Embodiment

[0047] Please refer to Figures 1 to 7 One embodiment of the present invention provides a method for manufacturing a two-way viewing control panel, comprising the following steps:

[0048] S1. A transparent conductive material 14 is disposed on the first substrate 11 to form a first control board;

[0049] S2. A photoaligning agent is added to the liquid crystal and mixed to form a liquid crystal mixture 13;

[0050] S3. A liquid crystal mixture 13 is coated on the transparent conductive material 14 of the first control board to form a mixed liquid crystal panel;

[0051] S4. The liquid crystal mixture 13 of the mixed liquid crystal panel is irradiated with ultraviolet light to form an oriented liquid crystal panel;

[0052] S5. A transparent conductive material 14 is disposed on the second substrate 12 to form a second control board;

[0053] S6. A second control board is superimposed on the directional LCD panel to form a viewing angle control panel.

[0054] Specifically, the transparent conductive material 14 is preferably indium-tin oxide; during the preparation of the liquid crystal mixture 13, the photoaligning agent is a UV-sensitive type (UV). 2 Type A photoaligner; the ratio of liquid crystal to photoaligner can be added as needed by those skilled in the art, and is not limited here. UV 2 Type A photoaligners can generate anisotropy through the photochemical reaction of ultraviolet-sensitive polymer materials. The photoaligning molecular alignment direction is parallel to the optical axis 21 of ultraviolet light. Alignment is achieved through light irradiation, eliminating the need for the liquid crystal layer to contact external objects and avoiding contamination caused by traditional liquid crystal alignment methods. The liquid crystal used in this invention is preferably a polymer-stabilized liquid crystal. The main component of polymer-stabilized liquid crystals is polymer. Under an electric field, polymer-stabilized liquid crystals can reversibly switch between transparent and opaque states. Furthermore, due to the lower polymer content, polymer-stabilized liquid crystals have a lower threshold voltage, resulting in a lower contrast ratio at the privacy viewing angle in privacy mode, thus improving the privacy protection effect. Those skilled in the art can choose other types of liquid crystals as needed. The use of polymer-stabilized liquid crystals as the optimal solution in this invention is for illustrative purposes only; it is not excluded that adding any type of liquid crystal or a combination of liquid crystals may also achieve the effects described in this invention.

[0055] In this embodiment, the liquid crystal includes a first type of liquid crystal 131 and a second type of liquid crystal 132. The first type of liquid crystal 131 and the second type of liquid crystal 132 in the liquid crystal mixture 13 of the mixed liquid crystal panel are irradiated with ultraviolet light to form an oriented liquid crystal panel.

[0056] Specifically, the liquid crystal in this invention includes two types of liquid crystals with different orientations: a first type of liquid crystal 131 and a second type of liquid crystal 132. The first type of liquid crystal 131 and the second type of liquid crystal 132 are oriented sequentially according to a preset angle to achieve a privacy protection effect from two perspectives. Those skilled in the art can prepare liquid crystals with more orientations according to their needs to form a privacy protection effect from multiple angles.

[0057] Furthermore, S4 also includes: setting an ultraviolet blocking block 22 on the second type of liquid crystal 132 of the liquid crystal mixture 13, irradiating the liquid crystal with first ultraviolet light to cause the first type of liquid crystal 131 therein to generate a first orientation, and the optical axis 211 of the first ultraviolet light forming a first angle with the first substrate 11.

[0058] Specifically, the first angle between the optical axis 211 of the first ultraviolet light and the first substrate 11 is preferably 45°.

[0059] Furthermore, S4 also includes: setting an ultraviolet blocking block 22 on the first type of liquid crystal 131 of the liquid crystal mixture 13, irradiating the liquid crystal with second ultraviolet light to cause the second type of liquid crystal 132 therein to generate a second orientation, and the optical axis 212 of the second ultraviolet light forming a second angle with the first substrate 11.

[0060] Specifically, the angle at which the optical axis 212 of the second ultraviolet light forms a second angle with the first substrate 11 is preferably 135°.

[0061] In this embodiment, S1 includes: depositing a transparent conductive material 14 on a first substrate 11, and then etching the transparent conductive material 14 on the first substrate 11 to form a plurality of first viewing angle control electrodes 141.

[0062] In this embodiment, S5 includes: depositing a transparent conductive material 14 on the second substrate 12, and then etching the transparent conductive material 14 on the second substrate 12 to form a plurality of second viewing angle control electrodes 142.

[0063] Specifically, the entire transparent conductive material 14 is etched into partial first-view control electrodes 141 and second-view control electrodes 142. The main purpose is to facilitate the separate control of the first type of liquid crystal 131 and the second type of liquid crystal 132. A planarization layer 15 is also coated on the transparent conductive material 14.

[0064] In this embodiment, S6 includes: disposing the second viewing angle control electrode 142 of the second substrate 12 on the side of the liquid crystal away from the first viewing angle control electrode 141, wherein the second viewing angle control electrode 142 is opposite to and offset from the first viewing angle control electrode 141, forming a bidirectional viewing angle control panel 10.

[0065] Specifically, by applying an electric field between the first viewing angle control electrode 141 and the second viewing angle control electrode 142, the liquid crystal in the liquid crystal mixture located between the first viewing angle control electrode 141 and the second viewing angle control electrode 142 can be oriented in a predetermined manner. In wide-viewing-angle mode, no electric field is applied between the first-viewing-angle control electrode 141 and the second-viewing-angle control electrode 142, i.e., the voltage difference between the first-viewing-angle control electrode 141 and the second-viewing-angle control electrode 142 is 0, and the first type of liquid crystal 131 and the second type of liquid crystal 132 are transparent. In single-viewing-angle privacy mode, no electric field can be applied between the first-viewing-angle control electrodes 141 and the second-viewing-angle control electrodes 142 on both sides of the first type of liquid crystal 131, making the first type of liquid crystal 131 transparent, while a preset electric field is applied between the first-viewing-angle control electrodes 141 and the second-viewing-angle control electrodes 142 on both sides of the second type of liquid crystal 132, making the second type of liquid crystal 132 opaque, thus achieving the privacy effect of the second viewing angle. Alternatively, no electric field can be applied between the first-viewing-angle control electrodes 141 and the second-viewing-angle control electrodes 142 on both sides of the second type of liquid crystal 132, making the second type of liquid crystal 132 transparent, while a preset electric field is applied between the first-viewing-angle control electrodes 141 and the second-viewing-angle control electrodes 142 on both sides of the first type of liquid crystal 131, making the first type of liquid crystal 131 opaque, thus achieving the privacy effect of the first viewing angle. In bidirectional privacy mode, a preset electric field is applied between the first viewing angle control electrodes 141 and 142 on both sides of the first type of liquid crystal 131 and between the first viewing angle control electrodes 141 and 142 on both sides of the second type of liquid crystal 132. The first type of liquid crystal 131 and the second type of liquid crystal 132 become opaque, thus preventing the display image from being viewed from either the first or second viewing angle. In partial privacy mode, a preset electric field is applied between liquid crystals with a specific orientation in a specific area, making the liquid crystals in that specific area opaque. This specific orientation liquid crystal can be either the first type of liquid crystal 131 with a first orientation or the second type of liquid crystal 132 with a second orientation. Alternatively, an electric field can be applied simultaneously between the first type of liquid crystal 131 and the second type of liquid crystal 132 within the specific area.

[0066] Second Embodiment

[0067] Please refer to Figures 8 to 10 The present invention also provides a method for preparing a four-view control panel, which differs from the first embodiment in that the liquid crystal further includes a third type of liquid crystal 133 and a fourth type of liquid crystal 134, and the third type of liquid crystal 133 and the fourth type of liquid crystal 134 in the liquid crystal mixture 13 of the mixed liquid crystal panel are irradiated sequentially with ultraviolet light.

[0068] In this embodiment, S4 further includes: setting an ultraviolet light blocking block 22 on the fourth type of liquid crystal 134 of the liquid crystal mixture 13, irradiating the liquid crystal with third ultraviolet light to cause the third type of liquid crystal 133 therein to generate a third orientation, the optical axis 213 of the third ultraviolet light forming a third angle with the first substrate 11, and / or setting an ultraviolet light blocking block 22 on the third type of liquid crystal 133 of the liquid crystal mixture 13, irradiating the liquid crystal with fourth ultraviolet light to cause the fourth type of liquid crystal 134 therein to generate a fourth orientation, the optical axis 214 of the fourth ultraviolet light forming a fourth angle with the first substrate 11.

[0069] Specifically, the third angle formed between the optical axis 213 of the third ultraviolet light and the first substrate 11 is preferably 45°, and the fourth angle formed between the optical axis 214 of the fourth ultraviolet light and the first substrate 11 is preferably 135°. The orientations of the first type liquid crystal 131, the second type liquid crystal 132, the third type liquid crystal 133, and the fourth type liquid crystal 134 are all different. In particular, the first type liquid crystal 131 and the second type liquid crystal 132 are symmetrical about the midline between the first type liquid crystal 131 and the second type liquid crystal 132 as the axis of symmetry, and the third type liquid crystal 133 and the fourth type liquid crystal 134 are symmetrical about the midline between the third type liquid crystal 133 and the fourth type liquid crystal 134 as the axis of symmetry. The axes of symmetry of the first type liquid crystal 131 and the second type liquid crystal 132 and the axes of symmetry of the third type liquid crystal 133 and the fourth type liquid crystal 134 are preferably coincident.

[0070] Third Embodiment

[0071] Please refer to Figures 11 to 15 In other embodiments of the present invention, a viewing angle control display screen is also provided. This embodiment uses a two-way viewing angle control display screen as an example. The two-way viewing angle control display screen includes a two-way viewing angle control panel 10 and a display panel 30 prepared by the preparation method of the two-way viewing angle control panel as described in the first embodiment. The two-way viewing angle control panel 10 is disposed on the light-emitting side of the display panel 30. The display panel 30 shown in the accompanying drawings of the present invention is only used as an example for auxiliary illustration and should not be construed as limiting its structure.

[0072] Specifically, the display panel 30 has a plurality of pixel units 31 arranged in an array. Each pixel unit 31 is provided with a corresponding first viewing angle control electrode 141 and a second viewing angle control electrode 142, so as to individually control the corresponding first type liquid crystal 131 and second type liquid crystal 132 on each pixel unit 31, so that the light transmitted from each pixel unit 31 is controlled by the corresponding first type liquid crystal 131 and / or second type liquid crystal 132.

[0073] Please continue to participate. Figure 12 , Figure 12A preset electric field is applied between the first viewing angle control electrode 141 and the second viewing angle control electrode 142 corresponding to the first type of liquid crystal 131 and the second viewing angle control electrode 142 corresponding to the second type of liquid crystal 132. The first type of liquid crystal 131 and the second type of liquid crystal 132 are both in an opaque state. The first viewing angle (left viewing angle in this embodiment) and the second viewing angle (right viewing angle in this embodiment) cannot see the picture displayed on the screen. That is, at this time, the viewing angle control screen is in a two-way anti-peeping mode for left and right viewing angles.

[0074] Please continue to participate. Figure 13 , Figure 13 A preset electric field is applied between the first viewing angle control electrode 141 and the second viewing angle control electrode 142 corresponding to the first type of liquid crystal 131, and no electric field is applied between the first viewing angle control electrode 141 and the second viewing angle control electrode 142 corresponding to the second type of liquid crystal 132. In this state, the first type of liquid crystal 131 is opaque, and the second type of liquid crystal 132 is transparent. The image displayed on the screen cannot be viewed from the first viewing angle (left viewing angle in this embodiment), but the image displayed on the screen can be viewed from the second viewing angle (right viewing angle in this embodiment). That is, the viewing angle control display screen is in a left-viewing angle one-way privacy mode. The method for setting the right-viewing angle one-way privacy mode of the bidirectional viewing angle control display screen of the present invention is similar to the method for setting the left-viewing angle one-way privacy mode described above.

[0075] Please continue to participate. Figure 14 , Figure 14 No preset electric field is applied between the first viewing angle control electrode 141 and the second viewing angle control electrode 142 corresponding to the first type of liquid crystal 131 and the second viewing angle control electrode 142 corresponding to the second type of liquid crystal 132. The first type of liquid crystal 131 and the second type of liquid crystal 132 are both in a transparent state. The image displayed on the screen can be viewed from both the first viewing angle (left viewing angle in this embodiment) and the second viewing angle (right viewing angle in this embodiment). That is, the viewing angle control screen is in wide viewing angle mode at this time.

[0076] Please continue to participate. Figure 15 , Figure 15The bidirectional viewing angle control display screen is divided into left, middle, and right sections. The left section is set to a left-side privacy mode, where a preset electric field is applied to both sides of the first type of liquid crystal 131 on the left side of the display screen, making the first type of liquid crystal 131 on the left side opaque. The middle section is set to a right-side privacy mode, where a preset electric field is applied to both sides of the second type of liquid crystal 132 in the middle of the display screen, making the second type of liquid crystal 132 in the middle opaque. The right section is set to a bidirectional privacy mode, where a preset electric field is applied to both sides of the first type of liquid crystal 131 and both sides of the second type of liquid crystal 132 on the right side of the display screen, making both the first type of liquid crystal 131 and the second type of liquid crystal 132 on the left side of the display screen opaque. Figure 15 In the partial privacy mode of the dual-view control display shown, the right and left sides of the screen cannot be viewed from the first viewpoint of the dual-view control display, and the right and center sides cannot be viewed from the second viewpoint of the dual-view control display. It should be noted that the different partial privacy modes for the left, right, and center sides described above are only used as examples to illustrate the partial privacy modes of the dual-view control panel 10 and should not be considered as limiting other partial privacy modes of the dual-view control display of this invention.

[0077] It is worth noting that a single viewing angle control microunit includes a first viewing angle control electrode 141, a second viewing angle control electrode 142, and a liquid crystal with a specific orientation located between the first viewing angle control electrode 141 and the second viewing angle control electrode 142. On a single pixel unit 31, the number of each type of viewing angle control microunit containing a single-oriented liquid crystal is typically multiple. The three viewing angle control microunits with a single-oriented liquid crystal shown in the illustration are only examples. Those skilled in the art can set the corresponding number as needed, and this should not limit the solution of the present invention.

[0078] Please continue to participate. Figure 11Where WVA(L / R) means wide viewing angle mode, viewing the image from the left and right sides; NVA(L / R) means narrow viewing angle mode, viewing the image from the left and right sides; and WVA&NVA(U / D) means wide viewing angle mode and narrow viewing angle mode, viewing the image from the top and bottom, respectively. Clearly, in wide viewing angle mode, the difference between the image seen from the left and right sides of the dual-viewing angle control display and the image seen from the center of the dual-viewing angle control display is small. In narrow viewing angle mode, a clear image cannot be seen at an extreme angle of 45 degrees, and the image is completely invisible at extreme angles above 55 degrees. In narrow viewing angle mode, the image seen from the top and bottom of the dual-viewing angle control display is consistent with the image seen from the left and right sides in wide viewing angle mode. From the above data, it can be seen that the viewing angle control panel provided by this invention has no adverse effect on the display of the display panel 30 when no electric field is applied. When the privacy mode is activated, the display image cannot be seen from the side requiring privacy, and the privacy mode has lower contrast and better privacy.

[0079] Fourth embodiment

[0080] Please refer to Figures 16 to 17 The present invention provides a first four-way viewing angle control display screen, which includes a two-way viewing angle control panel 10 obtained by the preparation method of the two-way viewing angle control panel as described in the first embodiment. The number of two-way viewing angle control panels 10 is two, including a first viewing angle control panel 100 and a second viewing angle control panel 200. The optical axis direction of the emitted light of the second viewing angle control panel 200 forms an angle greater than 0° and less than 180° with the optical axis direction of the emitted light of the first viewing angle control panel 100.

[0081] In this embodiment, the optical axis direction of the emitted light of the second viewing angle control panel 200 is preferably perpendicular to the optical axis direction of the emitted light of the first viewing angle control panel 100. The first viewing angle control panel 100 is used as a privacy control panel for controlling the left and right viewing angles of the display screen, and the second viewing angle control panel 200 is used as a privacy control panel for controlling the up and down viewing angles of the display screen.

[0082] Specifically, when privacy settings are required in all aspects of the display screen depending on the screen shape or user needs, multiple viewing angle control panels with different optical axis directions of emitted light can be superimposed on the display screen to obtain a privacy effect in the preset direction.

[0083] Fifth embodiment

[0084] Please refer to Figure 18 In an embodiment of the present invention, a second four-way viewing angle control display screen is also provided, comprising a four-way viewing angle control panel obtained by the preparation method of the four-way viewing angle control panel as described in the second embodiment and a display panel 30 as described in the third embodiment.

[0085] Please refer to the original second embodiment. Figure 8 Specifically, the display panel 30 has a plurality of pixel units 31 arranged in an array. Each pixel unit 31 is provided with a corresponding first viewing angle control electrode 141 and a second viewing angle control electrode 142 to individually control the corresponding first type liquid crystal 131, second type liquid crystal 132, third type liquid crystal 133 and fourth type liquid crystal 134 on each pixel unit 31, so that the light transmitted from each pixel unit 31 is controlled by the corresponding first type liquid crystal 131, second type liquid crystal 132, third type liquid crystal 133 and fourth type liquid crystal 134.

[0086] The viewing angle control panel provided by this invention, by adding a photoaligning agent to the liquid crystal and applying ultraviolet light irradiation, utilizes the force of the photoaligning agent molecules to cause the liquid crystal to form different orientations in the liquid crystal mixture 13, thereby obtaining a bidirectional viewing angle control panel 10 with two viewing angle privacy settings. The liquid crystal molecules with two orientations exist in the same viewing angle control panel, simplifying the process and avoiding the increased thickness of the display screen caused by stacking two unidirectional viewing angle control panels. This invention also provides a viewing angle control display screen with more than two viewing angle directions, such as a four-way viewing angle control display screen. This can be achieved by setting the liquid crystal to four different orientations, so that the liquid crystal molecules with four orientations exist in the same viewing angle control panel. Corresponding viewing angle control electrodes are set according to specific orientations to achieve independent control of the liquid crystal molecules with different orientations, thus obtaining a four-way viewing angle control panel with four viewing angle privacy settings. Alternatively, a second viewing angle control panel 200 with an emitted light optical axis direction perpendicular to the emitted light optical axis direction of the first viewing angle control panel 100 can be superimposed on the bidirectional viewing angle control display screen to achieve a four-way viewing angle privacy effect. In addition, the viewing angle control panel of the present invention preferably uses polymer-stabilized liquid crystal, which can not only achieve reversible switching between transparent and opaque states under the action of an electric field, but also has a lower threshold voltage due to the lower polymer content of the polymer-stabilized liquid crystal, resulting in lower contrast of the display screen at the privacy viewing angle in the privacy mode.

[0087] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for fabricating a viewing control panel, characterized in that, Includes the following steps: S1. A transparent conductive material (14) is disposed on the first substrate (11) to form a first control board; S1 includes: depositing the transparent conductive material (14) on the entire surface of the first substrate (11), and then etching the transparent conductive material (14) on the first substrate (11) to form a plurality of first viewing angle control electrodes (141). S2. Add a photoaligning agent to the liquid crystal and mix to form a liquid crystal mixture (13). S3. The liquid crystal mixture (13) is coated on the transparent conductive material (14) of the first control plate to form a mixed liquid crystal panel; S4. Irradiate the liquid crystal mixture (13) of the hybrid liquid crystal panel with ultraviolet light to form an oriented liquid crystal panel; S5. The transparent conductive material (14) is disposed on the second substrate (12) to form a second control board; S5 includes: depositing the transparent conductive material (14) on the entire surface of the second substrate (12), and then etching the transparent conductive material (14) on the second substrate (12) to form a plurality of second viewing angle control electrodes (142). S6. The second control board is superimposed on the directional liquid crystal panel to form a viewing angle control panel; S6 includes: disposing the second viewing angle control electrode (142) of the second substrate (12) on the side of the liquid crystal away from the first viewing angle control electrode (141), wherein the second viewing angle control electrode (142) is opposite to and offset from the first viewing angle control electrode (141); The liquid crystal includes a first type of liquid crystal (131) and a second type of liquid crystal (132). The first type of liquid crystal (131) and the second type of liquid crystal (132) in the liquid crystal mixture (13) of the mixed liquid crystal panel are respectively irradiated with ultraviolet light. The first type of liquid crystal (131) and the second type of liquid crystal (132) are two different orientations of liquid crystal and have an angle with the first substrate (11). The first type of liquid crystal (131) and the second type of liquid crystal (132) can reversibly switch between transparent and opaque states on their own.

2. The method for preparing the viewing control panel as described in claim 1, characterized in that, The S4 includes: setting an ultraviolet light blocking block (22) on the second type of liquid crystal (132) of the liquid crystal mixture (13), irradiating the first type of liquid crystal (131) with a first ultraviolet light to generate a first orientation, and forming a first angle between the optical axis (211) of the first ultraviolet light and the first substrate (11).

3. The method for preparing the viewing control panel as described in claim 2, characterized in that, The S4 further includes: setting the ultraviolet light blocking block (22) on the first type of liquid crystal (131) of the liquid crystal mixture (13), irradiating the second type of liquid crystal (132) with second ultraviolet light to generate a second orientation, and forming a second angle between the optical axis (212) of the second ultraviolet light and the first substrate (11).

4. The method for preparing the viewing control panel as described in claim 1, characterized in that, The liquid crystal also includes a third type of liquid crystal (133) and a fourth type of liquid crystal (134), and the third type of liquid crystal (133) and the fourth type of liquid crystal (134) in the liquid crystal mixture (13) of the mixed liquid crystal panel are irradiated sequentially with ultraviolet light.

5. The method for preparing the viewing control panel as described in claim 4, characterized in that, S4 further includes: setting the ultraviolet light blocking block (22) on the fourth type of liquid crystal (134) of the liquid crystal mixture (13), irradiating the liquid crystal with third ultraviolet light to cause the third type of liquid crystal (133) therein to generate a third orientation, the optical axis (213) of the third ultraviolet light forming a third angle with the first substrate (11), and / or setting the ultraviolet light blocking block (22) on the third type of liquid crystal (133) of the liquid crystal mixture (13), irradiating the liquid crystal with fourth ultraviolet light to cause the fourth type of liquid crystal (134) therein to generate a fourth orientation, the optical axis (214) of the fourth ultraviolet light forming a fourth angle with the first substrate (11).

6. A viewing angle control display screen, characterized in that, It includes a display panel (30) and a viewing control panel prepared by the method of preparing the viewing control panel as described in any one of claims 1-5, wherein the viewing control panel is disposed on the light-emitting side of the display panel (30).

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