Dimming box with switchable wide and narrow visual angles and display device

Abstract

The invention discloses a wide-narrow visual angle switchable dimming box and a display device, the dimming box comprises a first substrate, a second substrate and a dye liquid crystal layer, and the included angle between the alignment direction of one side, close to the first substrate, of the dye liquid crystal layer and the alignment direction of one side, close to the second substrate, of the dye liquid crystal layer is larger than or equal to 90 degrees; the dimming box is provided with a first area and a second area which are distributed alternately, a first visual angle control electrode is arranged on the side, facing the dye liquid crystal layer, of the first substrate, a second visual angle control electrode matched with the first visual angle control electrode is arranged on the side, facing the dye liquid crystal layer, of the second substrate, and the second visual angle control electrode corresponds to the second area. By means of the dye liquid crystal layer between the first substrate and the second substrate, in the narrow view angle mode, the first area is controlled to be in the light transmitting state, liquid crystal molecules and dye molecules corresponding to the second area are controlled to be in the lying posture and in the light shading state, so that the peep-proof effect is improved, a polaroid does not need to be arranged, and the light transmittance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and in particular to a dimming box and a display device with switchable wide and narrow viewing angles. Background Art

[0002] With the continuous advancement of liquid crystal display technology, the viewing angle of the display has been widened from the original 112° to more than 160°. While enjoying the visual experience brought by the wide viewing angle, people also hope to effectively protect business secrets and personal privacy to avoid business losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the demand for wide viewing angle, in many occasions, the display device is also required to have the function of switching between wide and narrow viewing angles.

[0003] Currently, the main method is to attach a louver film to the display screen to achieve switching between wide and narrow viewing angles. When anti-peeping is needed, the screen can be covered with a louver film to narrow the viewing angle. However, this method requires additional louver film, which will cause great inconvenience to the user. Moreover, a louver film can only achieve one viewing angle. Once the louver film is attached, the viewing angle is fixed in the narrow viewing angle mode, resulting in the inability to switch freely between the wide viewing angle mode and the narrow viewing angle mode. In addition, the anti-peeping film will reduce the brightness and affect the display effect.

[0004] The display panel of the prior art also uses a dimming box to switch between wide viewing angle and narrow viewing angle. The display panel also includes a display box, which is used for normal picture display. The dimming box is used to control the viewing angle switching. The dimming box includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The viewing angle control electrodes on the first substrate and the second substrate apply a vertical electric field to the liquid crystal molecules to deflect the liquid crystal in the vertical direction to achieve a narrow viewing angle mode. By controlling the voltage on the viewing angle control electrode, switching between a wide viewing angle and a narrow viewing angle can be achieved. However, the dimming box of the existing architecture mainly uses the liquid crystal molecules in a tilted state and is matched with a polarizer to achieve a light collection effect or a light leakage effect to achieve anti-peeping, and the anti-peeping effect is poor; moreover, this dimming box needs to be matched with a polarizer to achieve a narrow viewing angle effect, which greatly reduces the transmittance of light. Summary of the invention

[0005] In order to overcome the shortcomings and deficiencies in the prior art, an object of the present invention is to provide a dimming box and a display device with switchable wide and narrow viewing angles, so as to solve the problems of poor anti-peeping effect and low light transmittance of the wide and narrow viewing angle dimming box in the prior art.

[0006] The purpose of the present invention is achieved through the following technical solutions: The present invention provides a dimming box with switchable wide and narrow viewing angles, comprising a first substrate, a second substrate arranged opposite to the first substrate, and a dye liquid crystal layer located between the first substrate and the second substrate, wherein the dye liquid crystal layer comprises liquid crystal molecules and dye molecules mixed with each other, and an angle between an alignment direction of the dye liquid crystal layer close to the first substrate and an alignment direction close to the second substrate is greater than or equal to 90°; The dimming box has a first area and a second area that are alternately distributed with each other, a first viewing angle control electrode is provided on a side of the first substrate facing the dye liquid crystal layer, a second viewing angle control electrode that matches the first viewing angle control electrode is provided on a side of the second substrate facing the dye liquid crystal layer, and the second viewing angle control electrode corresponds to the second area; In the wide viewing angle mode, the first area and the second area are controlled to be in a light-transmitting state; in the 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-shielding state.

[0007] Furthermore, the liquid crystal molecules are negative liquid crystal molecules, and the pretilt angles of the liquid crystal molecules and the dye molecules are between 83° and 90°.

[0008] Furthermore, the liquid crystal molecules are positive liquid crystal molecules, and the pretilt angles of the liquid crystal molecules and the dye molecules are between 0° and 7°.

[0009] Furthermore, the dye liquid crystal layer is a whole surface structure corresponding to the dimming box; An auxiliary electrode cooperating with the first viewing angle control electrode is disposed on a side of the second substrate facing the dye liquid crystal layer, and the auxiliary electrode corresponds to the first area.

[0010] Furthermore, the auxiliary electrode and the second viewing angle control electrode are located in the same layer and are insulated and spaced apart from each other; or, the auxiliary electrode and the second viewing angle control electrode are located in different layers.

[0011] Furthermore, a receiving cavity is provided between the first substrate and the second substrate, the receiving cavity corresponds to the second region, and the dye liquid crystal layer is provided in the receiving cavity.

[0012] Furthermore, a groove is provided on a side of the first substrate facing the second substrate, and the groove and the second substrate together form the accommodating cavity; Alternatively, a groove is provided on a side of the second substrate facing the first substrate, and the groove and the first substrate together form the accommodation cavity; Alternatively, grooves corresponding to each other are provided on the sides of the first substrate and the second substrate facing each other, and the grooves on the first substrate and the second substrate jointly form the accommodating cavity.

[0013] Furthermore, the plane shape of the second region is a strip structure, and a plurality of the second regions are parallel to each other and spaced apart; Alternatively, the plane shape of the second area is a grid structure.

[0014] Furthermore, a light shielding layer is provided on a side of the second substrate away from the dye liquid crystal layer, and the light shielding layer corresponds to the second region.

[0015] The present application also provides a display device, including a display panel and the dimming box as described above, wherein the dimming box is arranged 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 image display.

[0016] The beneficial effect of the present invention is that: through the dye liquid crystal layer between the first substrate and the second substrate, the angle between the alignment direction of the dye liquid crystal layer close to the first substrate and the alignment direction close to the second substrate is greater than or equal to 90°. In the narrow viewing angle mode, the first area is controlled to be in a light-transmitting state, and the liquid crystal molecules and dye molecules corresponding to the second area are both in a lying posture and in a light-shielding state, so that the entire dimming box is a shutter structure, achieving a narrow viewing angle effect to improve the anti-peeping effect, and no polarizer is required to be set, which can improve the transmittance of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention in the initial state.

[0018] Figure 2 This is one of the planar structural schematic diagrams of the second viewing angle control electrode in the first embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the planar structure of the light shielding layer in the first embodiment of the present invention.

[0020] Figure 4 This is the second schematic diagram of the planar structure of the second viewing angle control electrode in the first embodiment of the present invention.

[0021] Figure 5 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention.

[0022] Figure 6 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention in the wide viewing angle mode.

[0023] Figure 7 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the first embodiment of the present invention.

[0024] Figure 8 It 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 the first embodiment of the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the initial state in the second embodiment of the present invention.

[0026] Fig.10 This is a driving waveform diagram of a dimming box with switchable wide and narrow viewing angles in the second embodiment of the present invention.

[0027] Fig.11 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the second embodiment of the present invention in the wide viewing angle mode.

[0028] Fig.12 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the second embodiment of the present invention.

[0029] Fig.13 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the initial state in the third embodiment of the present invention.

[0030] Fig.14 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in the third embodiment of the present invention.

[0031] Fig.15 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the third embodiment of the present invention in the wide viewing angle mode.

[0032] Fig.16 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the third embodiment of the present invention.

[0033] Fig.17 It is a schematic structural diagram of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the initial state.

[0034] Fig.18 This is a driving waveform diagram of a dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention.

[0035] Fig.19 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the wide viewing angle mode.

[0036] Fig. 20 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the narrow viewing angle mode.

[0037] Figure 21a-Figure 21f It is a schematic diagram of the manufacturing process of a dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention.

[0038] Fig. 22 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fifth embodiment of the present invention in the initial state.

[0039] Fig.23 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fifth embodiment of the present invention in the wide viewing angle mode.

[0040] Fig.24 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the fifth embodiment of the present invention.

[0041] Fig.25 It is one of the structural schematic diagrams of the display device in the present invention.

[0042] Fig.26 This is the second structural schematic diagram of the display device in the present invention.

[0043] Fig. 27 It is one of the planar structural schematic diagrams of the display device in the present invention.

[0044] Fig.28 This is the second schematic diagram of the planar structure of the display device in the present invention. DETAILED DESCRIPTION

[0045] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation, structure, features and effects of the dimming box and display device with switchable wide and narrow viewing angles proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments: [Example 1] Figure 1 It is a schematic structural diagram of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention in the initial state. Figure 2 This is one of the planar structural schematic diagrams of the second viewing angle control electrode in the first embodiment of the present invention. Figure 3 It is a schematic diagram of the planar structure of the light shielding layer in the first embodiment of the present invention. Figure 4 This is the second schematic diagram of the planar structure of the second viewing angle control electrode in the first embodiment of the present invention.

[0046] like Figures 1 to 4As shown, a dimming box 10 with a switchable wide and narrow viewing angle provided in the first embodiment of the present invention includes a first substrate 11, a second substrate 12 arranged opposite to the first substrate 11, and a dye liquid crystal layer 13 located between the first substrate 11 and the second substrate 12, and the dye liquid crystal layer 13 is a whole surface structure corresponding to the dimming box 10. The dye liquid crystal layer 13 includes liquid crystal molecules 131 and dye molecules 132 mixed with each other, and 0.5% to 3% of the dye molecules 132 are doped into the dye liquid crystal layer 13. The dye molecule 132 has an absorption axis and a transmission axis. The light absorption capacity of the long axis of the dye molecule 132 is greater than the light absorption capacity of the short axis. The dye molecule 132 has the characteristics of strong light absorption capacity of the long axis and weak light absorption capacity of the short axis, which can have a polarization effect on light. The angle between the alignment direction of the dye liquid crystal layer 13 close to the first substrate 11 and the alignment direction close to the second substrate 12 is greater than or equal to 90°. In this embodiment, the dye molecules 132 are preferably black dye molecules, and the liquid crystal molecules 131 are negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy. The pre-tilt angles of the liquid crystal molecules 131 and the dye molecules 132 are between 83° and 90°, that is, the liquid crystal molecules 131 and the dye molecules 132 are aligned approximately perpendicularly 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. The alignment direction of the dye liquid crystal layer 13 on the side close to the first substrate 11 is perpendicular to the alignment direction on the side close to the second substrate 12. The first substrate 11 is provided with a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 is provided with a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment direction of the first alignment layer is perpendicular to the alignment direction of the second alignment layer, that is, 90°. Of course, in other embodiments, the angle between the alignment direction of the dye liquid crystal layer 13 on the side close to the first substrate 11 and the alignment direction on the side close to the second substrate 12 can also be 180° or 270°.

[0047] The dimming box 10 has a first area 110 and a second area 120 that are alternately distributed. A first viewing angle control electrode 111 is provided on the side of the first substrate 11 facing the dye liquid crystal layer 13. A second viewing angle control electrode 121 that 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 area 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 area 120. Figure 2As shown, the plane patterns of the first area 110, the second area 120 and the second viewing angle control electrode 121 are all strip structures, a plurality of second areas 120 are parallel to each other and are spaced apart through the first area 110, a plurality of second viewing angle control electrodes 121 are parallel to each other and spaced apart, and a plurality of second viewing angle control electrodes 121 are connected to each other in the edge non-display area, so that the dimming box 10 can achieve a two-way anti-peeping effect. Of course, in another embodiment, such as Figure 4 As shown, the planar pattern of the second area 120 and the second viewing angle control electrode 121 may also be a grid structure, while the planar pattern of the first area 110 is a block structure and is separated from each other by the second area 120, so that the dimming box 10 can achieve an all-round anti-peeping effect.

[0048] 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, and the light shielding layer 14 corresponds to the second area 120, thereby increasing the anti-peeping effect. The light shielding layer 14 can be made of BM (black matrix) material, and the line width of the light shielding layer 14 is 5-10um, and the spacing is 20-30um; the line width of the second viewing angle control electrode 121 is 3-7um, and the spacing between the second viewing angle control electrodes 121 is greater than the line width of the second viewing angle control electrode 121; the box thickness of the dimming box 10 is 5-90um.

[0049] The first substrate 11 and the second substrate 12 may be made of glass, acrylic, polycarbonate, etc. The first viewing angle control electrode 111 and the second viewing angle control electrode 121 may be made of indium tin oxide (ITO) or indium zinc oxide (IZO), etc.

[0050] Figure 5 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention. Figure 6 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the first embodiment of the present invention in the wide viewing angle mode. Figure 7 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the first embodiment of the present invention. Figure 8 Schematic diagram of the principle of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the first embodiment 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: like Figure 5 and Figure 6As shown, in the wide viewing angle mode, the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are applied with corresponding wide viewing angle signals to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be in a standing posture and to be aligned with 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, and 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 the dye molecules 132 are basically not deflected and maintain the initial standing posture, that is, the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first area 110 and the second area 120 are all in a standing posture and in a light-transmitting state, so as to reduce the light absorption rate, and the light blocking effect is poor, and the light can pass through the dye liquid crystal layer 13 to achieve the wide viewing angle mode.

[0051] like Figure 5 , Figure 7 and Figure 8 As shown, in the narrow viewing angle mode, the corresponding narrow viewing angle signal is 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 the dye molecules 132 corresponding to the first area 110 to be in a standing posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the second area 120 to be in a lying posture. 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. The liquid crystal molecules 131 and the dye molecules 132 corresponding to the second area 120 will be deflected under the action of the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 corresponding to the second area 120 are parallel or approximately parallel to the first substrate 11 and the second substrate 12. The second area 120 The corresponding liquid crystal molecules 131 and dye molecules 132 change from a standing posture to a lying posture. Since the long axis of the dye molecule 132 has light absorption characteristics, light cannot pass through the dye liquid crystal layer 13 at this time, and the second area 120 is in a light-shielding state, and the light blocking effect is enhanced; and since there is no vertical electric field in the first area 110, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first area 110 are basically not deflected and maintain the initial standing posture, that is, the liquid crystal molecules 131 and dye molecules 132 corresponding to the first area 110 are in a standing posture, and light can pass through the first area 110 normally, and the first area is in a light-transmitting state. Therefore, Figure 8 As shown, in the narrow viewing angle mode, the entire dimming box 10 is similar to a shutter structure, so that the angle of light emission can be reduced to achieve an anti-peeping effect, and there is no need to set a polarizer, which can improve the transmittance of light.

[0052] [Example 2] Fig. 9 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the initial state in the second embodiment of the present invention. Fig. 9 As shown, the dimming box with switchable wide and narrow viewing angles provided in the second embodiment of the present invention is different from the dimming box in the first embodiment ( Figures 1 to 8 ) are basically the same as the dimming boxes with wide and narrow viewing angles, except that: In this embodiment, the liquid crystal molecules 131 are positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy, and the pre-tilt angles of the liquid crystal molecules 131 and the dye molecules 132 are between 0° and 7°, that is, the liquid crystal molecules 131 and the dye molecules 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, so that the dimming box 10 is in a black state in the initial state. The alignment direction of the dye liquid crystal layer 13 close to the first substrate 11 is perpendicular to the alignment direction of the second substrate 12. The first substrate 11 is provided with a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 is provided with a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment direction of the first alignment layer is perpendicular to the alignment direction of the second alignment layer, that is, 90°. Of course, in other embodiments, the angle between the alignment direction of the dye liquid crystal layer 13 close to the first substrate 11 and the alignment direction close to the second substrate 12 can also be 180° or 270°.

[0053] Furthermore, since the liquid crystal molecules 131 and the dye molecules 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, the dimming box 10 is in a black state in the initial state. Therefore, the second substrate 12 is provided with 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 area 110, thereby controlling the first area 110 to be in a light-transmitting state in both the wide viewing angle mode and the narrow viewing angle mode, so that light can pass through the dimming box 10.

[0054] In this embodiment, the auxiliary electrode 122 and the second viewing angle control electrode 121 are located in the same layer and are insulated and spaced apart from each other, that is, the auxiliary electrode 122 and the second viewing angle control electrode 121 are made of the same transparent conductive material layer and are etched together, thereby simplifying the manufacturing process. Among them, the line width of the auxiliary electrode 122 and the second viewing angle control electrode 121 is 3-6um, the line distance between the auxiliary electrode 122 and the second viewing angle control electrode 121 is 3-6um, and the spacing between the two auxiliary electrodes 122 is 6-12um, and the spacing between the two second viewing angle control electrodes 121 is 6-12um.

[0055] Fig.10 This is a driving waveform diagram of a dimming box with switchable wide and narrow viewing angles in the second embodiment of the present invention. Fig.11 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the second embodiment of the present invention in the wide viewing angle mode. Fig.12 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the second embodiment 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: like Fig.10 and Fig.11 As shown, in the wide viewing angle mode, the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are applied with a corresponding wide viewing angle signal, and the auxiliary electrode 122 is applied with a bright state voltage to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be in a standing 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, and the dye liquid crystal layer 13 is in a standing posture. The liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 will be deflected under the action of the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are approximately perpendicular to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are changed from a lying posture to a standing posture or an inclined state to reduce the light absorption rate, and the light blocking effect is poor, and the light can pass through the dye liquid crystal layer 13, that is, the first area 110 and the second area 120 are both in a light-transmitting state to achieve a wide viewing angle mode. Among them, 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 opposite polarities, the same frequency and amplitude, so that a horizontal electric field can be formed between the auxiliary electrode 122 and the second viewing angle control electrode 121 to increase the wide viewing angle effect.

[0056] like Fig.10 and Fig.12As shown, in the narrow viewing angle mode, the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are applied with corresponding narrow viewing angle signals, and the auxiliary electrode 122 is applied with a bright state voltage, so as to control the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first area 110 to be in a standing posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the second area 120 to be in a lying posture. 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 viewing angle control electrode 111 and the auxiliary electrode 122, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are deflected under the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are approximately perpendicular to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are approximately perpendicular to the first substrate 11 and the second substrate 12. The lying posture is changed to the standing posture to reduce the light absorption rate, and the light blocking effect is poor. The light can pass through the first area 110 normally, and the first area 110 is in a light-transmitting state; while the second area 120 basically has no vertical electric field, and the liquid crystal molecules 131 and dye molecules 132 corresponding to the second area 120 basically do not deflect and maintain the initial lying posture. Since the long axis of the dye molecule 132 has light absorption characteristics, the light cannot pass through the dye liquid crystal layer 13 of the second area 120 at this time, and the second area 120 is in a light-shielding state. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a shutter structure, so that the angle of light emission can be reduced to achieve an anti-peeping effect, and there is no need to set a polarizer, which can improve the transmittance of light.

[0057] In which, whether in the wide viewing angle mode or the 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 area 110 to be in a light-transmitting state so that light can pass through the dimming box 10.

[0058] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0059] [Example 3] Fig.13 Schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the initial state in the third embodiment of the present invention. Fig.13As shown, the dimming box with switchable wide and narrow viewing angles provided in the third embodiment of the present invention is different from the dimming box in the second embodiment ( Figures 9 to 12 ) are basically the same as the dimming boxes with wide and narrow viewing angles, except that: In this embodiment, the auxiliary electrode 122 and the second viewing angle control electrode 121 are located in different layers, thereby completely avoiding the short circuit problem between the auxiliary electrode 122 and the second viewing angle control electrode 121 and preventing interference between the auxiliary electrode 122 and the second viewing angle control electrode 121 .

[0060] Fig.14 This is a driving waveform diagram of the dimming box with switchable wide and narrow viewing angles in the third embodiment of the present invention. Fig.15 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the third embodiment of the present invention in the wide viewing angle mode. Fig.16 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the third embodiment 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: like Fig.14 and Fig.15As shown, in the wide viewing angle mode, the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are applied with a corresponding wide viewing angle signal, and the auxiliary electrode 122 is applied with a bright state voltage to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be in a standing posture and 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, and the dye liquid crystal layer 13 is in a standing posture. The liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 will be deflected under the action of the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are vertical or approximately vertical to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are changed from a lying posture to a standing posture to reduce the light absorption rate, and the light blocking effect is poor, and the light can pass through the dye liquid crystal layer 13, that is, the first area 110 and the second area 120 are both in a light-transmitting state to achieve a wide viewing angle mode. Among them, since the auxiliary electrode 122 and the second viewing angle control electrode 121 are located in different layers, there is basically no mutual interference between the auxiliary electrode 122 and the second viewing angle control electrode 121, so the polarity, frequency and amplitude of 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 are the same.

[0061] like Fig.14 and Fig.16As shown, in the narrow viewing angle mode, the first viewing angle control electrode 111 and the second viewing angle control electrode 121 are applied with corresponding narrow viewing angle signals, and the auxiliary electrode 122 is applied with a bright state voltage, so as to control the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first area 110 to be in a standing posture, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the second area 120 to be in a lying posture. 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 viewing angle control electrode 111 and the auxiliary electrode 122, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are deflected under the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are approximately perpendicular to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the first region 110 are approximately perpendicular to the first substrate 11 and the second substrate 12. The lying posture is changed to the standing posture to reduce the light absorption rate, and the light blocking effect is poor. The light can pass through the first area 110 normally, and the first area 110 is in a light-transmitting state; while the second area 120 basically has no vertical electric field, and the liquid crystal molecules 131 and dye molecules 132 corresponding to the second area 120 basically do not deflect and maintain the initial lying posture. Since the long axis of the dye molecule 132 has light absorption characteristics, the light cannot pass through the dye liquid crystal layer 13 of the second area 120 at this time, and the second area 120 is in a light-shielding state. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a shutter structure, so that the angle of light emission can be reduced to achieve an anti-peeping effect, and there is no need to set a polarizer, which can improve the transmittance of light.

[0062] In which, whether in the wide viewing angle mode or the 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 area 110 to be in a light-transmitting state so that light can pass through the dimming box 10.

[0063] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of the second embodiment and will not be described in detail here.

[0064] [Example 4] Fig.17 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the initial state. Fig.17As shown, the dimming box with switchable wide and narrow viewing angles provided in the fourth embodiment of the present invention is different from the dimming box in the first embodiment ( Figures 1 to 8 ) are basically the same as the dimming boxes with wide and narrow viewing angles, except that: In this embodiment, a receiving cavity 102 is provided between the first substrate 11 and the second substrate 12, and the receiving cavity 102 corresponds to the second region 120. The dye liquid crystal layer 13 is provided in the receiving cavity 102. That is, in this embodiment, the dye liquid crystal layer 13 is only provided in the second region 120, and 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.

[0065] In this embodiment, a groove 101 is provided on the side of the second substrate 12 facing the first substrate 11, and the groove 101 and the first substrate 11 together form a receiving cavity 102, so as to reduce the thickness of the dimming box 10. The second viewing angle control electrode 121 is arranged at the bottom of the groove 101, and the width of the groove 101 is 5-20um and the spacing is 30-60um. Of course, in other embodiments, a groove 101 can also be provided on the side of the first substrate 11 facing the second substrate 12, and the groove 101 and the second substrate 12 together form a receiving cavity 102.

[0066] In this embodiment, the liquid crystal molecules 131 are positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy, and the pre-tilt angles of the liquid crystal molecules 131 and the dye molecules 132 are between 0° and 7°, that is, the liquid crystal molecules 131 and the dye molecules 132 are aligned approximately parallel to the first substrate 11 and the second substrate 12, so that the dimming box 10 is in a narrow viewing angle state in the initial state. The alignment direction of the dye liquid crystal layer 13 on the side close to the first substrate 11 is perpendicular to the alignment direction on the side close to the second substrate 12. The first substrate 11 is provided with a first alignment layer on the side facing the dye liquid crystal layer 13, and the second substrate 12 is provided with a second alignment layer on the side facing the dye liquid crystal layer 13. The alignment direction of the first alignment layer is perpendicular to the alignment direction of the second alignment layer, that is, 90°. Of course, in other embodiments, the liquid crystal molecules 131 may also be negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy, and the pretilt angles of the liquid crystal molecules 131 and the dye molecules 132 are between 83° and 90°, that is, the liquid crystal molecules 131 and the dye molecules 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.

[0067] Fig.18 This is a driving waveform diagram of a dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention. Fig.19 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the wide viewing angle mode. Fig. 20 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fourth embodiment of the present invention in the narrow viewing angle mode. Figures 18 to 20As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles: like Fig.18 and Fig.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 the dye molecules 132 in the dye liquid crystal layer 13 to stand upright and to align the first substrate 11 with 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. The liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 will be deflected under the action of the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are changed from a lying posture to a standing posture to reduce the light absorption rate, and the light blocking effect is poor. The light can pass through the dye liquid crystal layer 13, that is, the second area 120 is in a light-transmitting state to achieve a wide viewing angle mode.

[0068] like Fig.18 and Fig. 20 As shown, in the narrow viewing angle mode, the corresponding narrow viewing angle signal is 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 the dye molecules 132 corresponding to the second area 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 the dye molecules 132 are basically not deflected and maintain the initial flat position. Since the long axis of the dye molecule 132 has a light absorption characteristic, the light cannot pass through the dye liquid crystal layer 13 at this time, and the second area 120 is in a light-shielding state, and the light blocking effect is enhanced. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a shutter structure, so that the angle of light emission can be reduced to achieve an anti-peeping effect, and there is no need to set a polarizer, which can improve the transmittance of light.

[0069] Figure 21a-Figure 21f FIG. 1 is a schematic diagram of the manufacturing process of the dimming box in the fourth embodiment of the present invention. Figure 21a-Figure 21f As shown, the manufacturing process of the dimming box 10 in this application is as follows: like Fig.21aAs shown, a first substrate 11 is provided, and a whole surface of a photoresist layer 1 is covered on the first substrate 11. The first substrate 11 can be made of glass, quartz, silicon, acrylic acid or polycarbonate, etc. The first substrate 11 can also be a flexible substrate. Suitable materials for the flexible substrate include, for example, polyethersulfone (PES), polyethylene naphthalate (PEN), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), polyethylene terephthalate (PET) or a combination thereof.

[0070] like Figure 21b As shown, the photoresist layer 1 is sequentially exposed and developed so that the photoresist layer 1 forms a patterned structure.

[0071] like Fig.21c As shown, the first substrate 11 is etched to form a groove 101 with the patterned photoresist layer 1 as a shield, and then the photoresist layer 1 is peeled off. The depth of the groove 101 is 50-100um, the spacing between the grooves 101 is 30-60um, and the longitudinal section of the groove 101 is a triangle, a trapezoid or a rectangle.

[0072] like Fig.21d As shown, a transparent conductive layer (such as ITO) is covered on the first substrate 11 having the groove 101, and then the transparent conductive layer is etched using a mask process (photoresist, exposure, development, etching, and photoresist removal), so as to form a first viewing angle control electrode 111 at the bottom of the groove 101. The first viewing angle control electrode 111 is directly arranged at the bottom of the groove 101 and has the same plane shape as the accommodating cavity 102 (i.e., the projection shape on the first substrate 11).

[0073] like Figure 21e-Figure 21f As shown, a second substrate 12 is then provided and covers the surface of the first substrate 11, so that a receiving cavity 102 is formed between the first substrate 11 and the second substrate 12 in the area corresponding to the groove 101, and the dye liquid crystal is vacuum-infused in the receiving cavity 102. The first substrate 11 and the second substrate 12 are bonded together by a sealing adhesive.

[0074] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0075] [Example 2] Fig. 22 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fifth embodiment of the present invention in the initial state. Fig. 22 As shown, the dimming box with switchable wide and narrow viewing angles provided in the second embodiment of the present invention is different from the dimming box provided in the fourth embodiment ( Figures 17 to 20 ) are basically the same as the dimming boxes with wide and narrow viewing angles, except that: In this embodiment, the first substrate 11 and the second substrate 12 are provided with grooves 101 corresponding to each other on the opposite sides, and the grooves on the first substrate 11 and the second substrate 12 jointly 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 area 120 and is disposed at the bottom of the groove 101 on the first substrate 11, and the second viewing angle control electrode 121 is disposed at the bottom of the groove 101 on the second substrate 12.

[0076] Fig.23 It is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the fifth embodiment of the present invention in the wide viewing angle mode. Fig.24 FIG. 1 is a schematic diagram of the structure of the dimming box with switchable wide and narrow viewing angles in the narrow viewing angle mode in the fifth embodiment of the present invention. Fig.23 and Fig.24 As shown, this embodiment also provides a control method for a dimming box 10 with switchable wide and narrow viewing angles: like Fig.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 the dye molecules 132 in the dye liquid crystal layer 13 to stand upright and to align the first substrate 11 with 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. The liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 will be deflected under the action of the vertical electric field, so that the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are changed from a lying posture to a standing posture to reduce the light absorption rate, and the light blocking effect is poor. The light can pass through the dye liquid crystal layer 13, that is, the second area 120 is all in a light-transmitting state to achieve a wide viewing angle mode.

[0077] like Fig.24As shown, in the narrow viewing angle mode, the corresponding narrow viewing angle signal is 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 the dye molecules 132 corresponding to the second area 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 the dye molecules 132 are basically not deflected and maintain the initial flat position. Since the long axis of the dye molecule 132 has a light absorption characteristic, the light cannot pass through the dye liquid crystal layer 13 at this time, and the second area 120 is in a light-shielding state, and the light blocking effect is enhanced. Therefore, in the narrow viewing angle mode, the entire dimming box 10 is similar to a shutter structure, so that the angle of light emission can be reduced to achieve an anti-peeping effect, and there is no need to set a polarizer, which can improve the transmittance of light.

[0078] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of the fourth embodiment and will not be described in detail here.

[0079] Fig.25 It is one of the structural schematic diagrams of the display device in the present invention. Fig.26 This is the second structural diagram of the display device in the present invention. Fig.25 and Fig.26 As shown, the present application also provides a display device, including a display panel 20 and a dimming box 10 arranged 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.

[0080] like Fig.25 As shown, the display panel 20 is a liquid crystal display panel, and the display device is provided with a backlight module 40 on the side of the display panel 20 away from the dimming box 10. Preferably, the backlight module 40 adopts a collimated backlight (CBL) mode, which can collect light and ensure the display effect.

[0081] The backlight module 40 includes a backlight source 41 and an anti-peep layer 43, and the anti-peep layer 43 is used to narrow the range of the light emission angle. A diffuser 42 is also provided between the backlight source 41 and the anti-peep layer 43, and the diffuser 42 makes the light more uniform. Among them, the anti-peep layer 43 is equivalent to a miniature shutter structure, which can block light with a larger incident angle and allow light with a smaller incident angle to pass through, so that the angle range of light passing through the anti-peep layer 43 becomes smaller. The anti-peep layer 43 includes a plurality of light-blocking walls arranged in parallel and a light-transmitting hole located between two adjacent light-blocking walls, and light-absorbing materials are provided on both sides of the light-blocking walls. Of course, the backlight source 41 can also be a light-collecting backlight source, so there is no need to set the anti-peep layer 43, but the light-collecting backlight source is more expensive than the conventional backlight source. The backlight module 40 can be a side-entry backlight module or a direct-down backlight module.

[0082] The display panel 20 includes a color filter substrate 21, an array substrate 22 arranged 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, negative liquid crystal molecules, i.e., liquid crystal molecules with negative dielectric anisotropy, are used in the liquid crystal layer 23. Compared with positive liquid crystal molecules, negative liquid crystal molecules have an advantage of 20% higher transmittance and higher CR (contrast ratio). 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 close to the color filter substrate 21 is parallel or anti-parallel to the negative liquid crystal molecules close to the array substrate 22. Of course, in other embodiments, positive liquid crystal molecules, i.e., liquid crystal molecules with positive dielectric anisotropy, may also be used in the liquid crystal layer 23.

[0083] A first polarizer 31 is disposed on the side of the display panel 20 facing the dimming box 10 , and a second polarizer 32 is disposed on the side of the display panel 20 away from the dimming box 10 . The light transmission axis of the first polarizer 31 is perpendicular to the light transmission axis of the second polarizer 32 .

[0084] The color filter substrate 21 is provided with color resist layers 212 arranged in an array and a 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), and correspondingly form sub-pixels of red (R), green (G), and blue (B).

[0085] The array substrate 22 is formed into a plurality of pixel units by a plurality of scan lines and a plurality of data lines which are insulated and crossed from each other on the side facing the liquid crystal layer 23. A pixel electrode 222 and a thin film transistor are provided in each pixel unit. 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 in the same layer and are electrically connected. The gate and the active layer are separated by an insulating layer. The source is electrically connected to the data line. The drain is electrically connected to the pixel electrode 222 through a contact hole.

[0086] like Fig.25 As shown, in this embodiment, a common electrode 221 is further 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 in different layers and are insulated and isolated by an insulating layer. The common electrode 221 can be located above or below the pixel electrode 222 ( Fig.25 As shown in the figure, the common electrode 221 is located below the pixel electrode 222). Preferably, the common electrode 221 is a planar electrode arranged on the entire surface, and the pixel electrode 222 is a block electrode arranged in each pixel unit or a slit electrode having a plurality of electrode strips to form a fringe field switching mode (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located on the same layer, but the two are insulated and isolated from each other, and the pixel electrode 222 and the common electrode 221 may each include a plurality of 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 mode (In-Plane Switching, IPS); or, in other embodiments, the array substrate 22 is provided with a pixel electrode 222 on the side facing the liquid crystal layer 23, and the color filter substrate 21 is provided with a common electrode 221 on the side facing the liquid crystal layer 23 to form a TN mode or a VA mode. As for other introductions to the TN mode and the VA mode, please refer to the prior art, which will not be repeated here.

[0087] The color filter substrate 21 and the array substrate 22 can be made of glass, acrylic, polycarbonate, etc. The common electrode 221 and the pixel electrode 222 can be made of indium tin oxide (ITO) or indium zinc oxide (IZO).

[0088] In another embodiment, if Fig.26As shown, the display panel 20 may also be a self-luminous display panel, and the dimming box 10 is located above the self-luminous display panel for dimming. When the display panel is a self-luminous display panel, there is no need to set a backlight module. The display panel 20 is, for example, an OLED (Organic Light-Emitting Diode) display or a Micro LED (Micro Light Emitting Diode) display. In the present embodiment, the self-luminous display panel 20 is an OLED display panel, including a substrate 24, an anode 241 and a cathode 243 provided 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 introduction to the self-luminous display panel, please refer to the prior art, which will not be repeated here.

[0089] Fig. 27 It is one of the planar structural schematic diagrams of the display device in the present invention. Fig.28 This is the second schematic diagram of the planar structure of the display device in the present invention. Fig. 27 and Fig.28 The display device is provided with a viewing angle switching button 50 for the user to send a viewing angle switching request to the display device. The viewing angle switching button 50 may be a physical button (such as Fig. 27 As shown), it can also be a software control or application (APP) to implement the switching function (such as Fig.28 As shown, the wide and narrow viewing angles are set by a sliding bar). When the user needs to switch between a wide viewing angle and a narrow viewing angle, the viewing angle switching button 50 can be operated to send a viewing angle switching request to the display device, and finally the driving 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 a wide viewing angle and a narrow viewing angle. When switching to a wide viewing angle, the driving method thereof adopts the driving method corresponding to the wide-angle mode, and when switching to a narrow viewing angle, the driving method thereof adopts the driving method corresponding to the narrow viewing angle mode. Therefore, the display device of the embodiment of the present invention has strong operational flexibility and convenience, and achieves a multifunctional display device integrating entertainment video and privacy confidentiality.

[0090] In this document, the directional words such as up, down, left, right, front, and back are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this document are only used to distinguish names and are not used to limit quantity and order.

[0091] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention 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 invention comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11), and a dye liquid crystal layer (13) located between the first substrate (11) and the second substrate (12), wherein the dye liquid crystal layer (13) comprises liquid crystal molecules (131) and dye molecules (132) mixed with each other, and an angle between an alignment direction of the dye liquid crystal layer (13) on a side close to the first substrate (11) and an alignment direction on a side close to the second substrate (12) is greater than or equal to 90°; The dimming box (10) has a first area (110) and a second area (120) which are alternately distributed with each other; a first viewing angle control electrode (111) is provided on a side of the first substrate (11) facing the dye liquid crystal layer (13); a second viewing angle control electrode (121) which cooperates with the first viewing angle control electrode (111) is provided on a side of the second substrate (12) facing the dye liquid crystal layer (13); and the second viewing angle control electrode (121) corresponds to the second area (120); In the wide viewing angle mode, the first area (110) and the second area (120) are controlled to be in a light-transmitting state; in the narrow viewing angle mode, the first area (110) is controlled to be in a light-transmitting state, and the second area (120) is controlled to be in a light-shielding state.

2. The dimming box with switchable wide and narrow viewing angles according to claim 1, characterized in that: The liquid crystal molecules (131) are negative liquid crystal molecules, and the pre-tilt angles of the liquid crystal molecules (131) and the dye molecules (132) are 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 molecules (131) are positive liquid crystal molecules, and the pre-tilt angles of the liquid crystal molecules (131) and the dye molecules (132) are 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 whole-surface structure corresponding to the dimming box (10); An auxiliary electrode (122) cooperating with the first viewing angle control electrode (111) is provided on a side of the second substrate (12) facing the dye liquid crystal layer (13); the auxiliary electrode (122) corresponds to the first area (110).

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 viewing angle control electrode (121) are located in the same layer and are insulated and spaced apart from each other; or, the auxiliary electrode (122) and the second viewing angle control electrode (121) are located in different layers.

6. The dimming box with switchable wide and narrow viewing angles according to claim 1, characterized in that: 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); and the dye liquid crystal layer (13) is provided in the receiving cavity (102).

7. The dimming box with switchable wide and narrow viewing angles according to claim 6, characterized in that: A groove (101) is provided on a side of the first substrate (11) facing the second substrate (12), and the groove (101) and the second substrate (12) together form the accommodating cavity (102); Alternatively, a groove (101) is provided on a side of the second substrate (12) facing the first substrate (11), and the groove (101) and the first substrate (11) together form the accommodating cavity (102); Alternatively, mutually corresponding grooves (101) are provided on the sides of the first substrate (11) and the second substrate (12) facing each other, and the grooves on the first substrate (11) and the second substrate (12) together form the accommodating cavity (102).

8. The dimming box with switchable wide and narrow viewing angles according to any one of claims 1 to 7, characterized in that: The plane shape of the second region (120) is a strip structure, and a plurality of the second regions (120) are parallel to each other and distributed at intervals; Alternatively, the plane 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 to 7, characterized in that: A light shielding layer (14) is provided on a side of the second substrate (12) away from the dye liquid crystal layer (13), and the light shielding layer (14) corresponds to the second area (120).

10. A display device, characterized in that: The invention comprises a display panel (20) and a dimming box (10) as claimed in any one of claims 1 to 9, wherein the dimming box (10) is arranged on the light emitting side of the display panel (20), the dimming box (10) is used to control the switching of viewing angles, and the display panel (20) is used to control the display of grayscale images.

Images