Wide and narrow angle of view switchable light adjusting box and display device

Abstract

The application discloses a wide-narrow view angle switchable light adjusting box and a display device. The light adjusting box comprises a first substrate, a second substrate and a dye liquid crystal layer. The included angle between the alignment direction of the side of the dye liquid crystal layer close to the first substrate and the alignment direction of the side of the dye liquid crystal layer close to the second substrate is greater than or equal to 90 DEG. The light adjusting box has first regions and second regions which are alternately distributed. The side of the first substrate facing the dye liquid crystal layer is provided with a first view angle control electrode. The side of the second substrate facing the dye liquid crystal layer is provided with a second view angle control electrode matched with the first view angle control electrode. The second view angle control electrode corresponds to the second regions. Through the dye liquid crystal layer between the first substrate and the second substrate, in the narrow view angle mode, the first regions are controlled to be in a light transmission state, and the liquid crystal molecules and the dye molecules corresponding to the second regions are both in a flat posture and are in a light shielding state, so that the peeping prevention effect is improved, and a polaroid is not needed to be arranged, and the light transmittance is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a dimming box with switchable wide and narrow viewing angles and a display device. Background Technology

[0002] With the continuous advancement of LCD technology, the viewing angle of monitors has expanded from approximately 112° to over 160°. While enjoying the visual experience brought by a wider viewing angle, people also desire to effectively protect trade secrets and personal privacy to avoid business losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the need for a wide viewing angle, many situations also require display devices to have the function of switching between wide and narrow viewing angles.

[0003] Currently, the main method used is to attach a Venetian blind film to the display screen to achieve the switching between wide and narrow viewing angles. When privacy is required, the screen can be covered with the Venetian blind film to narrow the viewing angle. However, this method requires an extra Venetian blind film, which causes great inconvenience to users. Moreover, a Venetian blind film can only achieve one viewing angle. Once the Venetian blind film is attached, the viewing angle is fixed in the narrow viewing angle mode, making it impossible to switch freely between the wide and narrow viewing angle modes. In addition, the privacy film will reduce the brightness and affect the display effect.

[0004] Existing display panels also utilize dimming boxes to switch between wide and narrow viewing angles. These panels include a display cell for normal image display and a dimming box for controlling viewing angle switching. The dimming box comprises a first substrate, a second substrate, and a liquid crystal layer between them. Viewing angle control electrodes on the first and second substrates apply a vertical electric field to the liquid crystal molecules, causing them to deflect vertically, thus achieving a narrow viewing angle mode. By controlling the voltage on the viewing angle control electrodes, switching between wide and narrow viewing angles can be achieved. However, in this existing dimming box architecture, the narrow viewing angle is achieved primarily by tilting the liquid crystal molecules in conjunction with a polarizer, resulting in light absorption or leakage for privacy purposes, but the privacy protection is poor. Furthermore, this type of dimming box requires a polarizer to achieve the narrow viewing angle effect, significantly reducing light transmittance. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a dimming box and display device with switchable wide and narrow viewing angles, so as to solve the problems of poor privacy protection effect and low light transmittance of the dimming box with wide and narrow viewing angles in the existing technology.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] The present invention provides a dimming box with switchable wide and narrow viewing angles, including a first substrate, a second substrate disposed opposite to the first substrate, and a dye liquid crystal layer located between the first substrate and the second substrate. The dye liquid crystal layer includes liquid crystal molecules and dye molecules mixed together, and the angle between the alignment direction of the dye liquid crystal layer on the side closer to the first substrate and the alignment direction on the side closer to the second substrate is greater than or equal to 90°.

[0008] The dimming box has a first region and a second region that are alternately distributed. The first substrate is provided with a first viewing angle control electrode on the side facing the dye liquid crystal layer. The second substrate is provided with a second viewing angle control electrode on the side facing the dye liquid crystal layer, which cooperates with the first viewing angle control electrode. The second viewing angle control electrode corresponds to the second region.

[0009] In wide-viewing-angle mode, both the first and second areas are controlled to be in a light-transmitting state; in narrow-viewing-angle mode, the first area is controlled to be in a light-transmitting state, and the second area is controlled to be in a light-blocking state.

[0010] Furthermore, the liquid crystal molecules are negative liquid crystal molecules, and the pretilt angle between the liquid crystal molecules and the dye molecules is between 83° and 90°.

[0011] Furthermore, the liquid crystal molecules are positive liquid crystal molecules, and the pretilt angle between the liquid crystal molecules and the dye molecules is between 0° and 7°.

[0012] Furthermore, the dye liquid crystal layer is a full-surface structure corresponding to the dimming box;

[0013] The second substrate has an auxiliary electrode on the side facing the dye liquid crystal layer that cooperates with the first viewing angle control electrode, and the auxiliary electrode corresponds to the first region.

[0014] Furthermore, the auxiliary electrode and the second viewing angle control electrode are located on the same layer and are insulated from each other; or, the auxiliary electrode and the second viewing angle control electrode are located on different layers.

[0015] Furthermore, a receiving cavity is provided between the first substrate and the second substrate, the receiving cavity corresponding to the second region, and the dye liquid crystal layer is disposed in the receiving cavity.

[0016] Furthermore, the first substrate has a groove on the side facing the second substrate, and the groove and the second substrate together form the receiving cavity;

[0017] Alternatively, the second substrate has a groove on the side facing the first substrate, and the groove and the first substrate together form the receiving cavity;

[0018] Alternatively, the first substrate and the second substrate may each have corresponding grooves on their opposite sides, and the grooves on the first substrate and the second substrate together form the receiving cavity.

[0019] Furthermore, the planar shape of the second region is a strip structure, with multiple second regions being parallel to each other and spaced apart;

[0020] Alternatively, the planar shape of the second region can be a grid structure.

[0021] Furthermore, a light-shielding layer is provided on the side of the second substrate away from the dye liquid crystal layer, and the light-shielding layer corresponds to the second region.

[0022] This application also provides a display device, including a display panel and a dimming box as described above. The dimming box is disposed on the light-emitting side of the display panel. The dimming box is used to control the viewing angle switching, and the display panel is used to control the grayscale display.

[0023] The beneficial effects of this invention are as follows: A dye-based liquid crystal layer is formed between the first and second substrates, with the angle between the alignment direction of the dye-based liquid crystal layer near the first substrate and the alignment direction near the second substrate being greater than or equal to 90°. In narrow viewing angle mode, the first region is controlled to be in a light-transmitting state, while the liquid crystal molecules and dye molecules in the second region are in a flat, light-blocking state. This makes the entire dimming box a venetian blind structure, achieving a narrow viewing angle effect to improve privacy. Furthermore, it eliminates the need for a polarizer, thus increasing light transmittance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 1 of the present invention.

[0025] Figure 2 This is one of the schematic diagrams of the planar structure of the second view control electrode in Embodiment 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the planar structure of the light-shielding layer in Embodiment 1 of the present invention.

[0027] Figure 4 This is the second schematic diagram of the planar structure of the second view control electrode in Embodiment 1 of the present invention.

[0028] Figure 5 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 1 of the present invention.

[0029] Figure 6 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode according to Embodiment 1 of the present invention.

[0030] Figure 7 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 1 of the present invention.

[0031] Figure 8 This is a schematic diagram of the principle of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 1 of the present invention.

[0032] Figure 9 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 2 of the present invention.

[0033] Figure 10 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 2 of the present invention.

[0034] Figure 11 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 2 of the present invention.

[0035] Figure 12 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 2 of the present invention.

[0036] Figure 13 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 3 of the present invention.

[0037] Figure 14 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 3 of the present invention.

[0038] Figure 15 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 3 of the present invention.

[0039] Figure 16 This is a schematic diagram of the dimmer box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 3 of the present invention.

[0040] Figure 17 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 4 of the present invention.

[0041] Figure 18 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 4 of the present invention.

[0042] Figure 19 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 4 of the present invention.

[0043] Figure 20 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 4 of the present invention.

[0044] Figures 21a-21f This is a schematic diagram of the manufacturing process of the dimming box with switchable wide and narrow viewing angles in Embodiment 4 of the present invention.

[0045] Figure 22 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 5 of the present invention.

[0046] Figure 23 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 5 of the present invention.

[0047] Figure 24 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 5 of the present invention.

[0048] Figure 25 This is one of the structural schematic diagrams of the display device in this invention.

[0049] Figure 26 This is the second schematic diagram of the display device in this invention.

[0050] Figure 27 This is one of the schematic diagrams of the planar structure of the display device in this invention.

[0051] Figure 28 This is the second schematic diagram of the planar structure of the display device in this invention. Detailed Implementation

[0052] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the wide and narrow viewing angle switchable dimming box and display device proposed according to the present invention:

[0053] [Example 1]

[0054] Figure 1 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state in Embodiment 1 of the present invention. Figure 2 This is one of the schematic diagrams of the planar structure of the second view control electrode in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the planar structure of the light-shielding layer in Embodiment 1 of the present invention. Figure 4 This is the second schematic diagram of the planar structure of the second view control electrode in Embodiment 1 of the present invention.

[0055] like Figures 1 to 4As shown, a dimming box 10 with switchable wide and narrow viewing angles provided in Embodiment 1 of the present invention includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a dye liquid crystal layer 13 located between the first substrate 11 and the second substrate 12. The dye liquid crystal layer 13 is a full-surface structure corresponding to the dimming box 10. The dye liquid crystal layer 13 includes liquid crystal molecules 131 and dye molecules 132 mixed together, and 0.5% to 3% of dye molecules 132 are incorporated into the dye liquid crystal layer 13. The dye molecules 132 have an absorption axis and a transmission axis. The light absorption capacity of the long axis of the dye molecules 132 is greater than that of the short axis. The dye molecules 132 have the characteristic of strong light absorption capacity along the long axis and very weak light absorption capacity along the short axis, which can polarize light. The angle between the alignment direction of the dye liquid crystal layer 13 on the side near the first substrate 11 and the alignment direction on the side near the second substrate 12 is greater than or equal to 90°. In this embodiment, the dye molecule 132 is preferably a black dye molecule, and the liquid crystal molecule 131 is a negative liquid crystal molecule, that is, a liquid crystal molecule with negative dielectric anisotropy. The pretilt angle between the liquid crystal molecule 131 and the dye molecule 132 is between 83° and 90°, that is, the liquid crystal molecule 131 and the dye molecule 132 are aligned approximately perpendicular to the first substrate 11 and the second substrate 12, thereby making the dimming box 10 have a wide viewing angle in the initial state. The alignment direction of the dye liquid crystal layer 13 near the first substrate 11 is perpendicular to the alignment direction near the second substrate 12. The first substrate 11 has a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 has a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment directions of the first alignment layer and the second alignment layer are perpendicular to each other, that is, at 90°. Of course, in other embodiments, the angle between the alignment direction of the dye liquid crystal layer 13 near the first substrate 11 and the alignment direction near the second substrate 12 can also be 180° or 270°.

[0056] The dimming box 10 has alternating first regions 110 and second regions 120. A first viewing angle control electrode 111 is provided on the side of the first substrate 11 facing the dye-liquid crystal layer 13, and a second viewing angle control electrode 121, which cooperates with the first viewing angle control electrode 111, is provided on the side of the second substrate 12 facing the dye-liquid crystal layer 13. The second viewing angle control electrode 121 corresponds to the second region 120. In this embodiment, the first viewing angle control electrode 111 is a planar electrode that covers the entire surface of the first substrate 11. Of course, the planar pattern of the first viewing angle control electrode 111 can also correspond to the second region 120. Figure 2As shown, the planar shapes of the first region 110, the second region 120, and the second viewing angle control electrode 121 are all strip-shaped structures. Multiple second regions 120 are parallel to each other and spaced apart through the first region 110. Multiple second viewing angle control electrodes 121 are parallel to each other and spaced apart. These electrodes are interconnected in the non-display area at the edges, thus enabling the dimming box 10 to achieve a two-way privacy protection effect. Of course, in another embodiment, as... Figure 4 As shown, the planar pattern of the second region 120 and the second viewing angle control electrode 121 can also be a grid structure, while the planar pattern of the first region 110 is a block structure and is separated from each other by the second region 120, so that the dimming box 10 can achieve an all-round privacy effect.

[0057] In this embodiment, a light-shielding layer 14 is provided on the side of the second substrate 12 away from the dye liquid crystal layer 13. The light-shielding layer 14 corresponds to the second region 120, thereby increasing the privacy protection effect. The light-shielding layer 14 can be made of BM (black matrix) material, with a line width of 5-10 μm and a spacing of 20-30 μm. The line width of the second viewing angle control electrodes 121 is 3-7 μm, and the spacing between the second viewing angle control electrodes 121 is greater than the line width of the second viewing angle control electrodes 121. The thickness of the dimming cell 10 is 5-90 μm.

[0058] The first substrate 11 and the second substrate 12 can be made of materials such as glass, acrylic, and polycarbonate. The first viewing angle control electrode 111 and the second viewing angle control electrode 121 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0059] Figure 5 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode according to Embodiment 1 of the present invention. Figure 7 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in Embodiment 1 of the present invention. Figure 8 This is a schematic diagram illustrating the principle of the dimming box with switchable wide and narrow viewing angles in narrow viewing angle mode according to Embodiment 1 of the present invention. Figures 5 to 8 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles:

[0060] like Figure 5 and Figure 6As shown, in the wide viewing angle mode, corresponding wide viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to stand upright on the first substrate 11 and the second substrate 12. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a wide viewing angle voltage (WVA) is applied to the second viewing angle control electrode 121. The voltage difference between the wide viewing angle voltage and the common voltage signal is zero or less than 0.3V. At this time, the liquid crystal molecules 131 and dye molecules 132 basically do not deflect and maintain their initial standing posture. That is, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 and the second region 120 are both standing upright and in a light-transmitting state to reduce the light absorption rate and the light blocking effect is poor. Light can pass through the dye liquid crystal layer 13 to achieve the wide viewing angle mode.

[0061] like Figure 5 , Figure 7 and Figure 8 As shown, in the narrow viewing angle mode, corresponding narrow viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 to be in an upright position, and the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 to be in a lying position. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a narrow viewing angle voltage (NVA) is applied to the second viewing angle control electrode 121. The voltage difference between the narrow viewing angle voltage and the common voltage signal is greater than 2V, and a vertical electric field is formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 121. Under the action of the vertical electric field, the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 will be deflected, making the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 parallel or approximately parallel to the first substrate 11 and the second substrate 12. The corresponding liquid crystal molecules 131 and dye molecules 132 change from an upright posture to a lying posture. Because the long axis of dye molecules 132 has light-absorbing properties, light cannot pass through the dye liquid crystal layer 13 at this time, and the second region 120 is in a light-blocking state, enhancing the light-blocking effect. However, since the first region 110 has no perpendicular electric field, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 basically do not deflect and maintain their initial upright posture. That is, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 are all in an upright posture, and light can pass through the first region 110 normally; the first region is in a light-transmitting state. Therefore, as... Figure 8 As shown, in narrow viewing angle mode, the entire dimming box 10 is similar to a venetian blind structure, which can reduce the angle at which light is emitted to achieve a privacy effect. Moreover, there is no need to set a polarizer, which can improve the light transmittance.

[0062] [Example 2]

[0063] Figure 9 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state according to Embodiment 2 of the present invention. Figure 9 As shown, the dimming box with switchable wide and narrow viewing angles provided in Embodiment 2 of the present invention is similar to that in Embodiment 1 ( Figures 1 to 8 The dimming boxes with switchable wide and narrow viewing angles in the above are basically the same, the difference being:

[0064] In this embodiment, the liquid crystal molecule 131 is a positive liquid crystal molecule, that is, a liquid crystal molecule with positive dielectric anisotropy. The pretilt angle between the liquid crystal molecule 131 and the dye molecule 132 is between 0° and 7°, that is, the liquid crystal molecule 131 and the dye molecule 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, so that the dimming cell 10 is in a black state in the initial state. The alignment direction of the dye liquid crystal layer 13 on the side near the first substrate 11 is perpendicular to the alignment direction on the side near the second substrate 12. The first substrate 11 has a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 has a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment directions of the first alignment layer and the second alignment layer are perpendicular to each other, that is, at 90°. Of course, in other embodiments, the angle between the alignment direction of the dye liquid crystal layer 13 on the side near the first substrate 11 and the alignment direction on the side near the second substrate 12 can also be 180° or 270°.

[0065] Furthermore, since the liquid crystal molecules 131 and dye molecules 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, and the dimming box 10 is in a black state in the initial state, the second substrate 12 is provided with an auxiliary electrode 122 on the side facing the dye liquid crystal layer 13, which cooperates with the first viewing angle control electrode 111. The auxiliary electrode 122 corresponds to the first region 110, thereby controlling the first region 110 to be in a light-transmitting state in both wide viewing angle mode and narrow viewing angle mode, so that light can pass through the dimming box 10.

[0066] In this embodiment, the auxiliary electrode 122 and the second viewing angle control electrode 121 are located on the same layer and are insulated from each other. That is, the auxiliary electrode 122 and the second viewing angle control electrode 121 are formed by etching the same transparent conductive material layer together, which simplifies the manufacturing process. The line width of the auxiliary electrode 122 and the second viewing angle control electrode 121 is 3-6 μm, the line spacing between the auxiliary electrode 122 and the second viewing angle control electrode 121 is 3-6 μm, the spacing between the two auxiliary electrodes 122 is 6-12 μm, and the spacing between the two second viewing angle control electrodes 121 is 6-12 μm.

[0067] Figure 10This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 2 of the present invention. Figure 11 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 2 of the present invention. Figure 12 This is a schematic diagram of the dimmer box with switchable wide and narrow viewing angles in the narrow viewing angle mode according to Embodiment 2 of the present invention. Figures 10 to 12 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles:

[0068] like Figure 10 and Figure 11 As shown, in the wide-viewing-angle mode, corresponding wide-viewing-angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121, while a bright-state voltage is applied to the auxiliary electrode 122 to control the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to be in an upright posture. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, a wide-viewing-angle voltage (WVA) is applied to the second viewing angle control electrode 121, and a bright-state voltage (V1) is applied to the auxiliary electrode 122. The voltage difference between the wide-viewing-angle voltage and the common voltage signal, and the voltage difference between the bright-state voltage and the common voltage signal, are both greater than 2V, and a vertical electric field is formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 121, and between the first viewing angle control electrode 111 and the auxiliary electrode 122. Under the action of a vertical electric field, the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 will be deflected, making them approximately perpendicular to the first substrate 11 and the second substrate 12. The liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 change from a lying position to a standing or tilted position to reduce light absorption and reduce light blocking effect, allowing light to pass through the dye liquid crystal layer 13. That is, both the first region 110 and the second region 120 are in a transparent state, achieving a wide viewing angle mode. The wide viewing angle voltage (WVA) applied to the second viewing angle control electrode 121 has the opposite polarity but the same frequency and amplitude as the bright state voltage (V1) applied to the auxiliary electrode 122, thereby forming a horizontal electric field between the auxiliary electrode 122 and the second viewing angle control electrode 121 to enhance the wide viewing angle effect.

[0069] like Figure 10 and Figure 12As shown, in the narrow viewing angle mode, corresponding narrow viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121, while a bright-state voltage is applied to the auxiliary electrode 122. This controls the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 to be in an upright position, and the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 to be in a lying position. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, a narrow viewing angle voltage (NVA) is applied to the second viewing angle control electrode 121, and a bright-state voltage (V1) is applied to the auxiliary electrode 122. The voltage difference between the narrow viewing angle voltage and the common voltage signal is zero or less than 0.3V, and the voltage difference between the bright-state voltage and the common voltage signal is greater than 2V. A vertical electric field is formed between the first-view control electrode 111 and the auxiliary electrode 122. Under the influence of this vertical electric field, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 will be deflected, causing them to be approximately perpendicular to the first substrate 11 and the second substrate 12. The dimmer box 10 changes from a lying to a standing position to reduce light absorption and reduce light blocking. Light can pass through the first region 110 normally, making the first region 110 transparent. The second region 120 has virtually no vertical electric field, and the liquid crystal molecules 131 and dye molecules 132 in the second region 120 remain largely undeflected and maintain their initial lying position. Because the long axis of the dye molecules 132 has light-absorbing properties, light cannot pass through the dye liquid crystal layer 13 in the second region 120, making the second region 120 light-blocking. Therefore, in narrow viewing angle mode, the entire dimmer box 10 resembles a venetian blind structure, thus reducing the angle at which light is emitted, achieving a privacy effect, and eliminating the need for a polarizer, thereby increasing light transmittance.

[0070] In both wide-viewing-angle mode and narrow-viewing-angle mode, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111 and a bright state voltage (V1) is applied to the auxiliary electrode 122, thereby controlling the first region 110 to be in a light-transmitting state so that light can pass through the dimming box 10.

[0071] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0072] [Example 3]

[0073] Figure 13 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state according to Embodiment 3 of the present invention. Figure 13As shown, the dimming box with switchable wide and narrow viewing angles provided in Embodiment 3 of the present invention is similar to that in Embodiment 2 (… Figures 9 to 12 The dimming boxes with switchable wide and narrow viewing angles in the above are basically the same, the difference being:

[0074] In this embodiment, the auxiliary electrode 122 and the second view control electrode 121 are located on different layers, thereby completely avoiding the problem of short circuit between the auxiliary electrode 122 and the second view control electrode 121 and preventing interference between the auxiliary electrode 122 and the second view control electrode 121.

[0075] Figure 14 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 3 of the present invention. Figure 15 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 3 of the present invention. Figure 16 This is a schematic diagram of the dimmer box with switchable wide and narrow viewing angles in the narrow viewing angle mode according to Embodiment 3 of the present invention. Figures 14 to 16 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles:

[0076] like Figure 14 and Figure 15As shown, in the wide-viewing-angle mode, corresponding wide-viewing-angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121, while a bright-state voltage is applied to the auxiliary electrode 122 to control the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to be in an upright posture relative to the first substrate 11 and the second substrate 12. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, a wide-viewing-angle voltage (WVA) is applied to the second viewing angle control electrode 121, and a bright-state voltage (V1) is applied to the auxiliary electrode 122. The voltage difference between the wide-viewing-angle voltage and the common voltage signal, and the voltage difference between the bright-state voltage and the common voltage signal, are both greater than 2V, and a vertical electric field is formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 121, and between the first viewing angle control electrode 111 and the auxiliary electrode 122. Under the action of a vertical electric field, the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 will be deflected, making them perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12. The liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 change from a lying posture to an upright posture to reduce light absorption and reduce light blocking effect, allowing light to pass through the dye liquid crystal layer 13. That is, both the first region 110 and the second region 120 are in a transparent state, thus achieving a wide viewing angle mode. Since the auxiliary electrode 122 and the second viewing angle control electrode 121 are located in different layers, there is virtually no mutual interference between them. Therefore, the wide viewing angle voltage (WVA) applied to the second viewing angle control electrode 121 and the bright state voltage (V1) applied to the auxiliary electrode 122 have the same polarity, frequency, and amplitude.

[0077] like Figure 14 and Figure 16As shown, in the narrow viewing angle mode, corresponding narrow viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121, while a bright-state voltage is applied to the auxiliary electrode 122. This controls the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 to be in an upright position, and the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 to be in a lying position. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, a narrow viewing angle voltage (NVA) is applied to the second viewing angle control electrode 121, and a bright-state voltage (V1) is applied to the auxiliary electrode 122. The voltage difference between the narrow viewing angle voltage and the common voltage signal is zero or less than 0.3V, and the voltage difference between the bright-state voltage and the common voltage signal is greater than 2V. A vertical electric field is formed between the first-view control electrode 111 and the auxiliary electrode 122. Under the influence of this vertical electric field, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first region 110 will be deflected, causing them to be approximately perpendicular to the first substrate 11 and the second substrate 12. The dimmer box 10 changes from a lying to a standing position to reduce light absorption and reduce light blocking. Light can pass through the first region 110 normally, making the first region 110 transparent. The second region 120 has virtually no vertical electric field, and the liquid crystal molecules 131 and dye molecules 132 in the second region 120 remain largely undeflected and maintain their initial lying position. Because the long axis of the dye molecules 132 has light-absorbing properties, light cannot pass through the dye liquid crystal layer 13 in the second region 120, making the second region 120 light-blocking. Therefore, in narrow viewing angle mode, the entire dimmer box 10 resembles a venetian blind structure, thus reducing the angle at which light is emitted, achieving a privacy effect, and eliminating the need for a polarizer, thereby increasing light transmittance.

[0078] In both wide-viewing-angle mode and narrow-viewing-angle mode, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111 and a bright state voltage (V1) is applied to the auxiliary electrode 122, thereby controlling the first region 110 to be in a light-transmitting state so that light can pass through the dimming box 10.

[0079] Those skilled in the art should understand that the remaining structure and working principle of this embodiment are the same as those of Embodiment 2, and will not be described again here.

[0080] [Example 4]

[0081] Figure 17 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state according to Embodiment 4 of the present invention. Figure 17As shown, the dimming box with switchable wide and narrow viewing angles provided in Embodiment 4 of the present invention is similar to that in Embodiment 1 ( Figures 1 to 8 The dimming boxes with switchable wide and narrow viewing angles in the above are basically the same, the difference being:

[0082] In this embodiment, a receiving cavity 102 is provided between the first substrate 11 and the second substrate 12. The receiving cavity 102 corresponds to the second region 120. The dye liquid crystal layer 13 is disposed in the receiving cavity 102. That is, in this embodiment, the dye liquid crystal layer 13 is only provided in the second region 120, while the first region 110 does not need to be provided with the dye liquid crystal layer 13 and is always in a light-transmitting state.

[0083] In this embodiment, a groove 101 is provided on the side of the second substrate 12 facing the first substrate 11. The groove 101 and the first substrate 11 together form a receiving cavity 102, thereby reducing the thickness of the dimming box 10. The second viewing angle control electrode 121 is disposed at the bottom of the groove 101, which has a width of 5-20 μm and a spacing of 30-60 μm. Alternatively, in other embodiments, the groove 101 may also be provided on the side of the first substrate 11 facing the second substrate 12, with the groove 101 and the second substrate 12 together forming the receiving cavity 102.

[0084] In this embodiment, the liquid crystal molecule 131 is a positive liquid crystal molecule, that is, a liquid crystal molecule with positive dielectric anisotropy. The pretilt angle between the liquid crystal molecule 131 and the dye molecule 132 is between 0° and 7°, that is, the liquid crystal molecule 131 and the dye molecule 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, thereby making the dimming cell 10 have a narrow viewing angle in the initial state. The alignment direction of the dye liquid crystal layer 13 on the side near the first substrate 11 is perpendicular to the alignment direction on the side near the second substrate 12. The first substrate 11 has a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 has a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment directions of the first alignment layer and the second alignment layer are perpendicular to each other, that is, at 90°. Of course, in other embodiments, the liquid crystal molecule 131 can also be a negative liquid crystal molecule, that is, a liquid crystal molecule with negative dielectric anisotropy. The pretilt angle of the liquid crystal molecule 131 and the dye molecule 132 is between 83° and 90°, that is, the liquid crystal molecule 131 and the dye molecule 132 are aligned approximately perpendicular to the first substrate 11 and the second substrate 12, so that the dimming box 10 is in a wide viewing angle state in the initial state.

[0085] Figure 18 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in Embodiment 4 of the present invention. Figure 19 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 4 of the present invention. Figure 20 This is a schematic diagram of the dimmer box with switchable wide and narrow viewing angles in the narrow viewing angle mode according to Embodiment 4 of the present invention. Figures 18 to 20 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles:

[0086] like Figure 18 and Figure 19 As shown, in the wide viewing angle mode, corresponding wide viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to stand upright and to the first substrate 11 and the second substrate 12. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a wide viewing angle voltage (WVA) is applied to the second viewing angle control electrode 121. The voltage difference between the wide viewing angle voltage and the common voltage signal is greater than 2V, and a vertical electric field is formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 121. Under the action of the vertical electric field, the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 will be deflected, making the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12. The liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 change from a lying posture to a standing posture to reduce the light absorption rate and the light blocking effect is poor. Light can pass through the dye liquid crystal layer 13, that is, the second region 120 is in a light-transmitting state to achieve a wide viewing angle mode.

[0087] like Figure 18 and Figure 20 As shown, in the narrow viewing angle mode, corresponding narrow viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 to be in a flat position. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a narrow viewing angle voltage (NVA) is applied to the second viewing angle control electrode 121. The voltage difference between the narrow viewing angle voltage and the common voltage signal is zero or less than 0.3V. The liquid crystal molecules 131 and dye molecules 132 basically do not deflect and maintain their initial flat position. Since the long axis of the dye molecules 132 has light absorption characteristics, light cannot pass through the dye liquid crystal layer 13 at this time, and the second region 120 is in a light-blocking state, which enhances the light blocking effect. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a venetian blind structure, which can reduce the angle of light emission, achieve a privacy protection effect, and eliminate the need for a polarizer, thereby improving light transmittance.

[0088] Figures 21a-21f This is a schematic diagram of the manufacturing process of the dimming box in Embodiment 4 of the present invention. Figures 21a-21f As shown, the manufacturing process of the dimming box 10 in this application is as follows:

[0089] like Figure 21aAs shown, a first substrate 11 is provided, and a photoresist layer 1 is covered on the entire surface of the first substrate 11. The first substrate 11 may be made of materials such as glass, quartz, silicon, acrylic, or polycarbonate. The first substrate 11 may also be a flexible substrate. Suitable materials for flexible substrates include, for example, polyethersulfone (PES), polyethylene naphthalate (PEN), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or combinations thereof.

[0090] like Figure 21b As shown, the photoresist layer 1 is subjected to exposure and development processes in sequence, so that the photoresist layer 1 forms a patterned structure.

[0091] like Figure 21c As shown, the first substrate 11 is etched to form a groove 101 using a patterned photoresist layer 1 as a shield, and then the photoresist layer 1 is peeled off. The groove 101 has a depth of 50~100um, a spacing of 30~60um between grooves 101, and a longitudinal cross-sectional shape of the groove 101 that is triangular, trapezoidal, or rectangular.

[0092] like Figure 21d As shown, a transparent conductive layer (e.g., ITO) is coated on a first substrate 11 having a groove 101. Then, a masking process (applying photoresist, exposure, development, etching, and photoresist removal) is used to etch the transparent conductive layer, thereby forming a first viewing angle control electrode 111 at the bottom of the groove 101. The first viewing angle control electrode 111 is directly disposed at the bottom of the groove 101 and has the same planar shape as the receiving cavity 102 (i.e., its projected shape on the first substrate 11).

[0093] like Figures 21e-21f As shown, a second substrate 12 is then provided and covers the surface of the first substrate 11, such that a receiving cavity 102 is formed between the first substrate 11 and the second substrate 12 in the region of the corresponding groove 101, and a dye liquid crystal is vacuum-filled into the receiving cavity 102. The first substrate 11 and the second substrate 12 are bonded together by a sealing adhesive.

[0094] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0095] [Example 2]

[0096] Figure 22 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the initial state according to Embodiment 5 of the present invention. Figure 22 As shown, the dimming box with switchable wide and narrow viewing angles provided in Embodiment 2 of the present invention is similar to that in Embodiment 4 (… Figures 17 to 20 The dimming boxes with switchable wide and narrow viewing angles in the above are basically the same, the difference being:

[0097] In this embodiment, the first substrate 11 and the second substrate 12 each have corresponding grooves 101 on their opposing sides. The grooves on the first substrate 11 and the second substrate 12 together form a receiving cavity 102, thereby further reducing the thickness of the dimming box 10. The first viewing angle control electrode 111 is a patterned structure corresponding to the second region 120 and is disposed at the bottom of the groove 101 on the first substrate 11. The second viewing angle control electrode 121 is disposed at the bottom of the groove 101 on the second substrate 12.

[0098] Figure 23 This is a schematic diagram of the dimming box with switchable wide and narrow viewing angles in the wide viewing angle mode in Embodiment 5 of the present invention. Figure 24 This is a schematic diagram of the dimmer box with switchable wide and narrow viewing angles in the narrow viewing angle mode according to Embodiment 5 of the present invention. Figure 23 and Figure 24 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles:

[0099] like Figure 23 As shown, in the wide viewing angle mode, corresponding wide viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 to stand upright and to the first substrate 11 and the second substrate 12. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a wide viewing angle voltage (WVA) is applied to the second viewing angle control electrode 121. The voltage difference between the wide viewing angle voltage and the common voltage signal is greater than 2V, and a vertical electric field is formed between the first viewing angle control electrode 111 and the second viewing angle control electrode 121. Under the action of the vertical electric field, the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 will be deflected, making the liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12. The liquid crystal molecules 131 and dye molecules 132 in the dye liquid crystal layer 13 change from a lying posture to a standing posture to reduce the light absorption rate and the light blocking effect is poor. Light can pass through the dye liquid crystal layer 13, that is, the second region 120 is in a transparent state to achieve a wide viewing angle mode.

[0100] like Figure 24As shown, in the narrow viewing angle mode, corresponding narrow viewing angle signals are applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 to control the liquid crystal molecules 131 and dye molecules 132 corresponding to the second region 120 to be in a flat position. For example, a common voltage signal (Vcom) is applied to the first viewing angle control electrode 111, and a narrow viewing angle voltage (NVA) is applied to the second viewing angle control electrode 121. The voltage difference between the narrow viewing angle voltage and the common voltage signal is zero or less than 0.3V. The liquid crystal molecules 131 and dye molecules 132 basically do not deflect and maintain their initial flat position. Since the long axis of the dye molecules 132 has light absorption characteristics, light cannot pass through the dye liquid crystal layer 13 at this time, and the second region 120 is in a light-blocking state, which enhances the light blocking effect. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a venetian blind structure, which can reduce the angle of light emission, achieve a privacy protection effect, and eliminate the need for a polarizer, thereby improving light transmittance.

[0101] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 4, and will not be repeated here.

[0102] Figure 25 This is one of the structural schematic diagrams of the display device in this invention. Figure 26 This is the second schematic diagram of the display device in this invention. (See attached diagram.) Figure 25 and Figure 26 As shown, this application also provides a display device, including a display panel 20 and a dimming box 10 disposed on the light-emitting side of the display panel 20. The dimming box 10 is used to control the viewing angle switching, and the display panel 20 is used to control the grayscale image display.

[0103] like Figure 25 As shown, the display panel 20 is a liquid crystal display panel. The display device has a backlight module 40 on the side of the display panel 20 away from the dimming box 10. Preferably, the backlight module 40 adopts collimated backlight (CBL) mode, which can collect light and ensure display effect.

[0104] The backlight module 40 includes a backlight source 41 and a privacy layer 43, which reduces the range of light emission angles. A diffuser 42 is also provided between the backlight source 41 and the privacy layer 43 to make the light more uniform. The privacy layer 43 is essentially a miniature venetian blind structure, which can block light with a large incident angle and allow light with a small incident angle to pass through, thus reducing the range of light angles passing through the privacy layer 43. The privacy layer 43 includes multiple parallel light-blocking walls and light-transmitting holes located between adjacent light-blocking walls, with light-absorbing material on both sides of the light-blocking walls. Of course, the backlight source 41 can also be a light-concentrating backlight source, thus eliminating the need for a privacy layer 43, but light-concentrating backlight sources are more expensive than conventional backlight sources. The backlight module 40 can be a side-lit backlight module or a direct-lit backlight module.

[0105] The display panel 20 includes a color filter substrate 21, an array substrate 22 disposed opposite to the color filter substrate 21, and a liquid crystal layer 23 located between the color filter substrate 21 and the array substrate 22. Preferably, the liquid crystal layer 23 uses negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy. Negative liquid crystal molecules have the advantage of 20% higher transmittance and higher CR (contrast ratio) compared to positive liquid crystal molecules. In the initial state, the negative liquid crystal molecules in the liquid crystal layer 23 are aligned parallel to the color filter substrate 21 and the array substrate 22, and the alignment direction of the negative liquid crystal molecules on the side closer to the color filter substrate 21 is parallel or antiparallel to the alignment direction of the negative liquid crystal molecules on the side closer to the array substrate 22. Of course, in other embodiments, the liquid crystal layer 23 may also use positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy.

[0106] A first polarizer 31 is provided on the side of the display panel 20 facing the dimming box 10, and a second polarizer 32 is provided on the side of the display panel 20 away from the dimming box 10. The light transmission axis of the first polarizer 31 and the light transmission axis of the second polarizer 32 are perpendicular to each other.

[0107] The color filter substrate 21 has color resist layers 212 arranged in an array and black matrix 211 separating the color resist layers 212. The color resist layers 212 include color resist materials of red (R), green (G) and blue (B) colors, and correspondingly form sub-pixels of red (R), green (G) and blue (B) colors.

[0108] The array substrate 22 has multiple pixel units defined by multiple scan lines and multiple data lines that are mutually insulated and intersecting on the side facing the liquid crystal layer 23. Each pixel unit has a pixel electrode 222 and a thin-film transistor. The pixel electrode 222 is electrically connected to the data line of the adjacent thin-film transistor through the thin-film transistor. The thin-film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan line are located on the same layer and are electrically connected. The gate and the active layer are isolated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 222 through a contact hole.

[0109] like Figure 25 As shown, in this embodiment, a common electrode 221 is also provided on the side of the array substrate 22 facing the liquid crystal layer 23. The common electrode 221 and the pixel electrode 222 are located on different layers and are insulated from each other by an insulating layer. The common electrode 221 can be located above or below the pixel electrode 222. Figure 25 The diagram shows the common electrode 221 located below the pixel electrode 222. Preferably, the common electrode 221 is a planar electrode disposed across the entire surface, and the pixel electrode 222 is a block electrode disposed within each pixel unit or a slit electrode with multiple electrode strips, to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located on the same layer, but they are insulated from each other. Both the pixel electrode 222 and the common electrode 221 may include multiple electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are arranged alternately to form an in-plane switching (IPS) mode; or, in other embodiments, the array substrate 22 has a pixel electrode 222 on the side facing the liquid crystal layer 23, and the color filter substrate 21 has a common electrode 221 on the side facing the liquid crystal layer 23 to form a TN mode or a VA mode. For further descriptions of the TN mode and VA mode, please refer to the prior art, which will not be repeated here.

[0110] The color filter substrate 21 and the array substrate 22 can be made of materials such as glass, acrylic, and polycarbonate. The common electrode 221 and the pixel electrode 222 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0111] In another embodiment, such as Figure 26As shown, the display panel 20 can also be a self-emissive display panel, with the dimming box 10 positioned above it for dimming. When the display panel is a self-emissive display panel, a backlight module is not required. The display panel 20 can be, for example, an OLED (Organic Light-Emitting Diode) display or a Micro LED (Micro Light-Emitting Diode) display. In this embodiment, the self-emissive display panel 20 is an OLED display panel, including a substrate 24, an anode 241 and a cathode 243 disposed on the substrate 24, and an organic light-emitting layer 242 located between the anode 241 and the cathode 243. By applying corresponding electrical signals to the anode 241 and the cathode 243, the corresponding organic light-emitting layer 242 is controlled to emit light. For a more detailed description of the self-emissive display panel, please refer to the prior art; further details are omitted here.

[0112] Figure 27 This is one of the schematic diagrams of the planar structure of the display device in this invention. Figure 28 This is the second schematic diagram of the planar structure of the display device in this invention. Please refer to... Figure 27 and Figure 28 The display device is equipped with a viewing angle switching button 50, which allows the user to request a viewing angle switch from the display device. The viewing angle switching button 50 can be a physical button (such as...). Figure 27 As shown), it can also be used for software control or application programs (APP) to implement switching functions (such as... Figure 28 As shown, the wide and narrow viewing angles are set via a slider. When a user needs to switch between a wide and narrow viewing angle, they can send a viewing angle switching request to the display device by operating the viewing angle switching button 50. Ultimately, the driver chip 60 controls the voltage applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121. When the electrical signals applied to the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are different, the display device can switch between wide and narrow viewing angles. Specifically, when switching to a wide viewing angle, the driving method corresponding to the wide-angle mode is used; when switching to a narrow viewing angle, the driving method corresponding to the narrow-angle mode is used. Therefore, the display device of this embodiment has strong operational flexibility and convenience, achieving a multi-functional display device integrating entertainment video and privacy protection.

[0113] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0114] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A dimming box with switchable wide and narrow viewing angles, characterized in that, The system includes a first substrate (11), a second substrate (12) disposed opposite to the first substrate (11), and a dye liquid crystal layer (13) located between the first substrate (11) and the second substrate (12). The dye liquid crystal layer (13) includes liquid crystal molecules (131) and dye molecules (132) mixed together. The angle between the alignment direction of the dye liquid crystal layer (13) on the side closer to the first substrate (11) and the alignment direction on the side closer to the second substrate (12) is greater than or equal to 90°. The dimming box (10) has a first region (110) and a second region (120) that are alternately distributed. The first substrate (11) has a first viewing angle control electrode (111) on the side facing the dye liquid crystal layer (13). The second substrate (12) has a second viewing angle control electrode (121) that cooperates with the first viewing angle control electrode (111) on the side facing the dye liquid crystal layer (13). The second viewing angle control electrode (121) corresponds to the second region (120). The second substrate (12) has an auxiliary electrode (122) that cooperates with the first viewing angle control electrode (111) on the side facing the dye liquid crystal layer (13). The auxiliary electrode (122) corresponds to the first region (110). In wide-viewing-angle mode, both the first region (110) and the second region (120) are controlled to be in a light-transmitting state; in narrow-viewing-angle mode, the auxiliary electrode (122) applies a bright-state voltage to control the first region (110) to be in a light-transmitting state and the second region (120) to be in a light-blocking state.

2. The dimming box with switchable wide and narrow viewing angles according to claim 1, characterized in that, The liquid crystal molecule (131) is a negative liquid crystal molecule, and the pretilt angle of the liquid crystal molecule (131) and the dye molecule (132) is between 83° and 90°.

3. The dimming box with switchable wide and narrow viewing angles according to claim 1, characterized in that, The liquid crystal molecule (131) is a positive liquid crystal molecule, and the pretilt angle of the liquid crystal molecule (131) and the dye molecule (132) is between 0° and 7°.

4. The dimming box with switchable wide and narrow viewing angles according to claim 3, characterized in that, The dye liquid crystal layer (13) is a full-surface structure corresponding to the dimming box (10).

5. The dimming box with switchable wide and narrow viewing angles according to claim 4, characterized in that, The auxiliary electrode (122) and the second view control electrode (121) are located on the same layer and are insulated from each other; or, the auxiliary electrode (122) and the second view control electrode (121) are located on different layers.

6. The dimming box with switchable wide and narrow viewing angles according to claim 1, characterized in that, A cavity (102) is provided between the first substrate (11) and the second substrate (12), the cavity (102) corresponds to the second region (120), and the dye liquid crystal layer (13) is disposed in the cavity (102).

7. The dimming box with switchable wide and narrow viewing angles according to claim 6, characterized in that, The first substrate (11) has a groove (101) on the side facing the second substrate (12), and the groove (101) and the second substrate (12) together form the receiving cavity (102); Alternatively, the second substrate (12) may have a groove (101) on the side facing the first substrate (11), and the groove (101) and the first substrate (11) together form the receiving cavity (102); Alternatively, the first substrate (11) and the second substrate (12) may each have corresponding grooves (101) on opposite sides, and the grooves on the first substrate (11) and the second substrate (12) together form the receiving cavity (102).

8. The dimming box with switchable wide and narrow viewing angles according to any one of claims 1-7, characterized in that, The planar shape of the second region (120) is a strip structure, with multiple second regions (120) being parallel to each other and spaced apart; Alternatively, the planar shape of the second region (120) is a grid structure.

9. The dimming box with switchable wide and narrow viewing angles according to any one of claims 1-7, characterized in that, The second substrate (12) has a light-shielding layer (14) on the side away from the dye liquid crystal layer (13), and the light-shielding layer (14) corresponds to the second region (120).

10. A display device, characterized in that, The display panel (20) includes a dimming box (10) as described in any one of claims 1-9, wherein the dimming box (10) is disposed on the light-emitting side of the display panel (20), the dimming box (10) is used to control the viewing angle switching, and the display panel (20) is used to control the grayscale display.

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