CN220357385U - Display panel with switchable wide and narrow viewing angles and display device - Google Patents

Abstract

The utility model provides a display panel with a switchable wide and narrow viewing angle and a display device, wherein the display panel comprises a dimming box and a display box which are mutually overlapped, the dimming box comprises an upper substrate, a lower substrate and a first liquid crystal layer, the upper substrate is positioned on the light emitting side of the lower substrate, the upper substrate comprises a first viewing angle electrode, the lower substrate comprises a metal layer, a second viewing angle electrode matched with the first viewing angle electrode, a reflecting layer which is closer to the first liquid crystal layer than the second viewing angle electrode, and a protective layer positioned between the second viewing angle electrode and the reflecting layer, the second viewing angle electrode is covered on the metal layer, and the protective layer is covered on the second viewing angle electrode. In the display panel and the display device with switchable wide and narrow viewing angles, the reflecting layer is arranged on the lower substrate, so that the brightness of the display panel can be improved, and a better narrow viewing angle effect can be obtained; the protection layer or the reflection layer is covered on the second visual angle electrode, so that the connection between the second visual angle electrode and the metal layer is normal, and the abnormal switching of wide and narrow visual angles is avoided.

Description

Display panel with switchable wide and narrow viewing angles and display device

Technical Field

The utility model relates to the technical field of displays, in particular to a display panel with switchable wide and narrow viewing angles and a display device.

Background

The liquid crystal display device (liquid crystal display, LCD) has advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is dominant in the field of flat panel display.

The current liquid crystal display device is gradually developed towards a wide viewing angle, which is not only a mobile terminal application of a mobile phone, a desktop display or a notebook computer, but also a display device is required to have a function of switching between a wide viewing angle and a narrow viewing angle in many occasions besides the requirement of the wide viewing angle. At present, the shutter shielding film is attached to the display screen to realize wide and narrow viewing angle switching, when peep prevention is needed, the shutter shielding film is utilized to shield the screen, so that the viewing angle can be reduced, but the shutter shielding film is additionally prepared in the mode, great inconvenience is caused to a user, one shutter shielding film can only realize one viewing angle, once the shutter shielding film is attached, the viewing angle is fixed in a narrow viewing angle mode, free switching cannot be performed between the wide viewing angle mode and the narrow viewing angle mode, and the shutter shielding film can cause luminance reduction to influence the display effect. In the prior art, a technology of switching between a wide viewing angle and a narrow viewing angle is also implemented by using a dual-box structure of a dimming box and a display panel, the display panel is used for normal picture display, the dimming box is used for controlling the switching of the viewing angle, the dimming box comprises an upper substrate, a lower substrate and a liquid crystal layer between the upper substrate and the lower substrate, and viewing angle control electrodes on the upper substrate and the lower substrate apply a vertical electric field to liquid crystal molecules, so that the liquid crystal deflects towards the vertical direction, and a narrow viewing angle mode is implemented. Switching between a wide viewing angle and a narrow viewing angle can be achieved by controlling the voltage on the viewing angle control electrode. In order to improve the brightness of the display panel and improve the display effect, a reflective layer may be disposed on the dimming box to reflect ambient light. However, an abnormality that the wide and narrow viewing angles cannot be switched is generally occurred after the reflective layer is fabricated.

Disclosure of Invention

Accordingly, the present utility model is directed to a display panel and a display device with switchable wide and narrow viewing angles, which can realize switching between wide and narrow viewing angles, have a better display effect, and improve the problem of abnormal switching between wide and narrow viewing angles.

The utility model provides a display panel with a switchable wide and narrow view angle, which comprises a dimming box and a display box which are mutually overlapped, wherein the dimming box comprises an upper substrate, a lower substrate which is arranged opposite to the upper substrate, and a first liquid crystal layer which is arranged between the upper substrate and the lower substrate, the upper substrate is positioned on the light emergent side of the lower substrate, the upper substrate comprises a first view angle electrode, the lower substrate comprises a metal layer, a second view angle electrode which is matched with the first view angle electrode, a reflecting layer which is closer to the first liquid crystal layer than the second view angle electrode, and a protective layer which is arranged between the second view angle electrode and the reflecting layer, the second view angle electrode is covered on the metal layer, and the protective layer is covered on the second view angle electrode.

In one embodiment, the display panel with switchable wide and narrow viewing angles includes a display area and a non-display area, the metal layer is disposed in the non-display area, the reflective layer is disposed in the display area, the second viewing angle electrode and the protective layer are both disposed in the display area and the non-display area, the second viewing angle electrode forms a sharp corner at the metal layer, and the protective layer covers the sharp corner of the second viewing angle electrode.

The utility model provides another display panel with a switchable wide and narrow view angle, which comprises a dimming box and a display box which are mutually overlapped, wherein the dimming box comprises an upper substrate, a lower substrate which is arranged opposite to the upper substrate, and a first liquid crystal layer which is arranged between the upper substrate and the lower substrate, the upper substrate is positioned on the light emergent side of the lower substrate, the upper substrate comprises a first view angle electrode, the lower substrate comprises a metal layer, a second view angle electrode matched with the first view angle electrode, and a reflecting layer which is closer to the first liquid crystal layer than the second view angle electrode, the second view angle electrode is covered on the metal layer, and the reflecting layer is used as a protective layer to be covered on the second view angle electrode.

In one embodiment, the display panel with switchable wide and narrow viewing angles includes a display area and a non-display area, the metal layer is disposed in the non-display area, the reflective layer is disposed in the display area, the second viewing angle electrode and the reflective layer are disposed in the display area and the non-display area, the second viewing angle electrode forms a sharp angle at the metal layer, and the reflective layer covers the sharp angle of the second viewing angle electrode.

In one embodiment, the reflective layer is a grid-like structure.

In one embodiment, the reflective layer includes a molybdenum layer and an aluminum layer, the aluminum layer being closer to one side of the first liquid crystal layer than the molybdenum layer.

In one embodiment, the dimming box is located on the light emitting side of the display box; or the dimming box is positioned on the light incident side of the display box; or the light-emitting side and the light-entering side of the display box are respectively provided with the dimming box.

In one embodiment, the second viewing angle electrode is a full-face electrode, and the metal layer is electrically connected to the second viewing angle electrode.

In one embodiment, the display box includes a color film substrate, an array substrate disposed opposite to the color film substrate, and a second liquid crystal layer disposed between the color film substrate and the array substrate; the display panel further comprises a first polaroid, a second polaroid and a third polaroid, wherein the first polaroid is arranged between the dimming box and the display box, the second polaroid is arranged on one side, far away from the display box, of the dimming box, and the third polaroid is arranged on one side, far away from the dimming box, of the display box.

The utility model also provides a display device which comprises a backlight module and the display panel with the switchable wide and narrow viewing angles, wherein the backlight module is positioned below the display panel.

According to the display panel and the display device with the switchable wide and narrow viewing angles, the reflecting layer is arranged on the lower substrate, so that ambient light can be reflected, the brightness of the display panel can be improved, and a good narrow viewing angle effect is obtained; meanwhile, the protective layer or the reflecting layer is covered on the second visual angle electrode, when the reflecting layer is etched, the sharp angle of the metal layer can be prevented from being etched and hollowed out, and then the first visual angle electrode is prevented from being broken at the sharp angle of the metal layer, so that the connection between the second visual angle electrode and the metal layer can be ensured to be normal, and the abnormal switching of wide and narrow visual angles can be avoided.

Drawings

Fig. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present utility model.

Fig. 2 is a schematic plan view of the display panel in fig. 1.

Fig. 3a to 3e are schematic structural views illustrating a manufacturing process of the lower substrate of the display panel in fig. 1.

Fig. 4 is a schematic cross-sectional view of a display panel according to a second embodiment of the utility model.

Fig. 5 is a schematic cross-sectional view of a display panel according to a third embodiment of the utility model.

Fig. 6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the utility model.

Fig. 7a to 7d are schematic structural views illustrating a process of manufacturing the lower substrate of the display panel of fig. 6.

Fig. 8 is a schematic cross-sectional view of a display device according to a fifth embodiment of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be further described with reference to the accompanying drawings.

The utility model provides a driving method of a display panel with switchable wide and narrow viewing angles, which realizes the switching of the wide and narrow viewing angle modes by arranging the bias electrodes of an upper substrate and applying signals and matching with the inversion driving mode of a lower substrate, solves the problems of vertical lines and horizontal lines in the traditional architecture and improves the display image quality of a display device.

First embodiment

Fig. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present utility model, fig. 2 is a schematic plan view of the display panel in fig. 1, and please refer to fig. 1 and fig. 2, wherein the display panel with switchable wide and narrow viewing angles according to the first embodiment of the present utility model includes a dimming box 10 and a display box 30 stacked on each other. In this embodiment, the dimming box 10 is disposed above the display box 30, that is, the dimming box 10 is disposed on the light emitting side of the display box 30, the dimming box 10 is used for controlling the viewing angle of the display panel, and the display box 30 is used for controlling the display panel to display a normal picture. It is understood that the dimming box 10 may also be disposed below the display box 30, i.e. the dimming box 10 is located on the light incident side of the display box 30. The dimming box 10 includes an upper substrate 11, a lower substrate 12 disposed opposite to the upper substrate 11, and a first liquid crystal layer 13 disposed between the upper substrate 11 and the lower substrate 12, the upper substrate 11 is located on a light emitting side of the lower substrate 12, the upper substrate 11 includes a first viewing angle electrode 111, the lower substrate 12 includes a metal layer 120, a second viewing angle electrode 121 matched with the first viewing angle electrode 111, a reflective layer 123 closer to the first liquid crystal layer 13 than the second viewing angle electrode 121, and a protective layer 125 disposed between the second viewing angle electrode 121 and the reflective layer 123, the second viewing angle electrode 121 is covered on the metal layer 120, and the protective layer 125 is covered on the second viewing angle electrode 121. Controlling the deflection of the liquid crystal molecules in the first liquid crystal layer 13 by controlling the pressure difference between the first viewing angle electrode 111 and the second viewing angle electrode 121, thereby achieving control of the wide-narrow viewing angle switching.

In this embodiment, the reflective layer is disposed on the lower substrate, so that ambient light can be reflected, brightness of the display panel can be improved, and a better narrow viewing angle effect can be obtained; meanwhile, the protective layer is covered on the second view angle electrode, when the reflecting layer is etched, the sharp angle of the metal layer can be prevented from being etched and hollowed out, and then the first view angle electrode is prevented from being broken at the sharp angle of the metal layer, so that the connection between the second view angle electrode and the metal layer can be ensured to be normal, and the abnormal switching of wide and narrow view angles can be avoided.

In this embodiment, the upper substrate 11 further includes a first substrate 113, and the first viewing angle electrode 111 is disposed on the first substrate 113 and located on a side of the upper substrate 11 facing the first liquid crystal layer 13. Specifically, the first viewing angle electrode 111 is provided on the bottom side of the first substrate 113. The first substrate 113 may be a glass substrate or a plastic substrate. The first viewing angle electrode 111 may be a transparent electrode, for example, an electrode made of an ITO (indium tin oxide) material.

In this embodiment, the second viewing angle electrode 121 may be a full-face electrode, the metal layer 120 is electrically connected to the second viewing angle electrode 121, and the metal layer 120 is used to transmit the electrical signals between the second viewing angle electrode 121 and the outside. In particular, the second viewing angle electrode 121 may be a transparent electrode, for example, an electrode made of an ITO (indium tin oxide) material.

Specifically, the display panel includes a display area a and a non-display area B, the metal layer 120 is disposed in the non-display area B, and the second viewing angle electrode 121 and the protective layer 125 are disposed in the display area a and the non-display area B. In general, the non-display area B is a frame area of the display panel. Specifically, the second viewing angle electrode 121 forms a sharp corner (i.e., forms a step portion) at the metal layer 120, and the protective layer 125 covers the sharp corner of the second viewing angle electrode 121.

Specifically, the display panel further includes a connector 129, and the connector 129 is electrically connected to the metal layer 120, thereby being connected to an external circuit through the connector 129.

Specifically, the metal layer 120 may include an aluminum layer and a molybdenum layer disposed at a side near the second viewing angle electrode 121.

Specifically, the reflective layer 123 is located in the display area a, and the reflective layer 123 may be a metal reflective layer. The reflective layer 123 includes a molybdenum layer and an aluminum layer, the aluminum layer being closer to one side of the first liquid crystal layer 13 than the molybdenum layer. The reflective layer 123 can reflect ambient light, and control the switching between wide and narrow viewing angles with the first viewing angle electrode 111 and the second viewing angle electrode 121, so that a better narrow viewing angle effect can be achieved; since the metal reflective layer 123 is provided on the lower substrate 12, a good narrow viewing angle effect can be achieved without providing a compensation film and an APF film between the dimming cartridge 10 and the display cartridge 30, and a wide viewing angle effect is not affected. In addition, since the reflective layer 123 is metal and has conductivity, the reflective layer 123 can also shield signal interference between the dimming case 10 and the display case 30 and prevent generation of static electricity on the display panel.

In particular, the reflective layer 123 may be a grid-like structure. Because the reflecting layer 123 adopts a grid structure, the transmission of the backlight is not affected basically, the intensity of the reflected ambient light is weak, and the display effect of the wide viewing angle is not affected basically because the intensity of the reflected ambient light is weak relative to that of the transparent backlight when the viewing angle is wide. More specifically, the reflective layer 123 in this embodiment has a diamond-shaped grid structure. It is understood that the reflective layer 123 may be a square, hexagonal, or other lattice structure.

Specifically, there may be no electrical connection relationship between the reflective layer 123 and the second viewing angle electrode 121.

Specifically, the protective layer 125 may be made of an insulating material.

In this embodiment, the lower substrate 12 further includes a second substrate 127, the metal layer 120 is disposed on the second substrate 127, and the second viewing angle electrode 121 covers the metal layer 120 and a region of the second substrate 127 where the metal layer 120 is not disposed. Specifically, the second substrate 127 may be a glass substrate or a plastic substrate.

In this embodiment, the lower substrate 12 further includes a first insulating layer 128, the first insulating layer 128 covers the reflective layer 123, and the first insulating layer 128 is located on a side of the lower substrate 12 facing the first liquid crystal layer 13. It is understood that the first insulating layer 128 may be omitted, and when the first insulating layer 128 is omitted from the lower substrate 12, a protective layer is required to be disposed on a side of the upper substrate 11 facing the first liquid crystal layer 13.

In this embodiment, the first liquid crystal layer 13 preferably employs positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy. In the initial state, the voltage difference between the first viewing angle electrode 111 and the second viewing angle electrode 121 is 0 or smaller (for example, smaller than the preset voltage difference value), the positive liquid crystal molecules in the first liquid crystal layer 13 may be aligned parallel to the upper substrate 11 and the lower substrate 12 (but in practical application, the positive liquid crystal molecules in the first liquid crystal layer 13 may have a smaller initial pretilt angle between the positive liquid crystal molecules and the upper substrate 11 and the lower substrate 12, and the range of the initial pretilt angle may be less than or equal to 10 degrees, namely: 0 deg. or less than or equal to θ or less than or equal to 10 deg.), the alignment direction of the positive liquid crystal molecules on the side close to the upper substrate 11 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules on the side close to the lower substrate 12, so that the light modulation cell 10 exhibits a wide viewing angle display in an initial state. When it is required to realize the narrow viewing angle display, a viewing angle control voltage is applied between the first viewing angle electrode 111 and the second viewing angle electrode 121, so that a large voltage difference is formed between the first viewing angle electrode 111 and the second viewing angle electrode 121 and a strong electric field is formed, to drive the positive liquid crystal molecules in the first liquid crystal layer 13 to deflect in the vertical direction, thereby making the dimming box 10 exhibit the narrow viewing angle display. It is understood that the first liquid crystal layer 13 may also employ negative liquid crystal molecules.

In this embodiment, the display box 30 includes a color film substrate 31, an array substrate 32 disposed opposite to the color film substrate 31, and a second liquid crystal layer 33 disposed between the color film substrate 31 and the array substrate 32.

In this embodiment, the color film substrate 31 is provided with a color resist layer 312 arranged in an array and a light shielding structure 314 for spacing the color resist layer 312, the color resist layer 312 includes red (R), green (G) and blue (B) color resist materials, and sub-pixels of red (R), green (G) and blue (B) colors are correspondingly formed, and the light shielding structure 314 is disposed at an edge of each sub-pixel and has a grid structure. The light shielding structure 314 may be a black matrix.

Specifically, the color film substrate 31 further includes a third substrate 316, the color stack layer 312 is disposed on the third substrate 316, and the color blocking layer 312 is located on a side of the color film substrate 31 facing the second liquid crystal layer 33. In particular, the third substrate 316 may be a glass substrate or a plastic substrate.

In this embodiment, the array substrate 32 is defined by a plurality of scan lines (not shown) and a plurality of data lines (not shown) on a side facing the second liquid crystal layer 33, and each pixel unit is provided with a pixel electrode 322 and a thin film transistor (not shown), and the pixel electrode 322 is electrically connected to the data line adjacent to the thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, wherein the gate electrode is located on the same layer as the scan line and electrically connected to the scan line, the gate electrode is isolated from the active layer by an insulating layer, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode 322 by a contact hole.

In this embodiment, the array substrate 32 further includes a common electrode 323, and the common electrode 323 and the pixel electrode 322 are located at different layers and are insulated and isolated by an insulating layer. The common electrode 323 may be located above or below the pixel electrode 322 (the common electrode 323 is shown below the pixel electrode 322 in fig. 1). Preferably, the common electrode 323 is a planar electrode disposed entirely, and the pixel electrode 322 is a block electrode disposed entirely within each pixel unit or a slit electrode having a plurality of electrode bars to form a fringe field switching pattern (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 322 and the common electrode 323 may be located at the same layer, but they are insulated from each other, each of the pixel electrode 322 and the common electrode 323 may include a plurality of electrode bars, and the electrode bars of the pixel electrode 322 and the electrode bars of the common electrode 323 are alternately arranged with each other to form an In-Plane Switching (IPS); alternatively, in other embodiments, the array substrate 32 is provided with the pixel electrode 322 on a side facing the second liquid crystal layer 33, and the color film substrate 31 is provided with the common electrode 323 on a side facing the second liquid crystal layer 33 to form a TN mode or a VA mode. The material of the common electrode 323 and the pixel electrode 322 may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO) or the like. The common electrode 323 is used to apply a common voltage (Vcom) for displaying a picture, and the pixel electrode 322 is used to receive a driving voltage (Vdata) through a data line to realize different gray scale display of a picture.

In this embodiment, the array substrate 32 further includes a fourth substrate 325, the thin film transistor may be disposed on the fourth substrate 325, a second insulating layer 327 may be disposed between the common electrode 323 and the thin film transistor, and a third insulating layer 328 may be disposed between the common electrode 323 and the pixel electrode 322. In particular, the fourth substrate 325 may be a glass substrate or a plastic substrate.

In this embodiment, the display panel may further include a first polarizer 60, a second polarizer 70 and a third polarizer 80, wherein the first polarizer 60 is disposed between the light modulation box 10 and the display box 30, the second polarizer 70 is disposed on one side of the light modulation box 10 away from the display box 30, and the third polarizer 80 is disposed on one side of the display box 30 away from the light modulation box 10. Specifically, the transmission axis of the first polarizer 60 is parallel to the transmission axis of the second polarizer 70, and the transmission axis of the third polarizer 80 is perpendicular to the transmission axis of the second polarizer 70.

The following describes a method for manufacturing the display panel of the present embodiment.

Fig. 3a to 3e are schematic structural diagrams illustrating a process of manufacturing a lower substrate of the display panel in fig. 1, and the manufacturing method of the display panel in this embodiment includes the following steps:

s11, as shown in FIG. 3a, a second substrate 127 is provided, a metal layer 120 is formed on the second substrate 127, a first mask plate with a pattern is provided, the first mask plate is used as shielding to expose the metal layer 120, then the metal layer 120 is subjected to development treatment, and the metal material of the exposed area is removed, so that the metal layer 120 is patterned.

S13, as shown in fig. 3b, the second viewing angle electrode 121 is covered on the metal layer 120. The second viewing angle electrode 121 covers the metal layer 120 and the region of the second substrate 127 where the metal layer 120 is not disposed.

S15, as shown in fig. 3c, a protective layer 125 is coated on the second viewing angle electrode 121.

S17, as shown in FIG. 3d, another metal layer is formed on the protection layer 125, a second mask plate with patterns is provided, the second mask plate is used as a shielding mask to expose the other metal layer, then the other metal layer is developed to remove the metal material of the exposed area, so that the other metal layer is patterned to form the reflecting layer 123.

S19, as shown in fig. 3e, a first insulating layer 128 is covered on the reflective layer 123. The first insulating layer 128 covers the reflective layer 123 and the region of the protective layer 125 where the reflective layer 123 is not disposed. The openings for the wires to pass through are required to be formed on the first insulating layer 128 and the protective layer 125, and the mask can be shared by the first insulating layer 128 and the protective layer 125 during processing.

S21, providing the upper substrate 11 and the first liquid crystal layer 13, and performing a box forming process on the lower substrate 12, the upper substrate 11 and the first liquid crystal layer 13, wherein the first liquid crystal layer 13 is sealed between the lower substrate 12 and the upper substrate 11, thereby forming the dimming box 10.

S23, providing the display case 30, and bonding the light modulation case 10 and the display case 30. The display box 30 is preferably a liquid crystal box, however, in other embodiments, the display box 30 may be a self-luminous display (e.g. OLED display, micro led display), but the dimming box 10 needs to be disposed above the display box 30.

Second embodiment

Fig. 4 is a schematic cross-sectional view of a display panel according to a second embodiment of the present utility model, please refer to fig. 4, and the difference between the present embodiment and the first embodiment is that, in the present embodiment, a dimming box 10 is disposed on each of the light emitting side and the light entering side of the display box 30. The specific structure of the dimming box 10 of the present embodiment is the same as that of the dimming box 10 in the first embodiment, and the specific structure of the display box 30 is the same as that of the display box 30 in the first embodiment, and will not be described here again. It is understood that, in the dimming box 10 of the present embodiment, which is located at the light incident side of the display box 30, the reflective layer may be omitted.

Third embodiment

Fig. 5 is a schematic cross-sectional view of a display panel according to a third embodiment of the present utility model, and referring to fig. 5, the difference between the present embodiment and the first embodiment is that, in the present embodiment, the dimming box 10 is disposed on the light incident side of the display box 30. The specific structure of the dimming box 10 of the present embodiment is the same as that of the dimming box 10 in the first embodiment, and the specific structure of the display box 30 is the same as that of the display box 30 in the first embodiment, and will not be described here again.

Fourth embodiment

Fig. 6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present utility model, referring to fig. 6, the display panel with switchable wide and narrow viewing angles provided in the fourth embodiment of the present utility model includes a dimming box 10 and a display box 30 stacked on each other. In this embodiment, the dimming box 10 is disposed above the display box 30, that is, the dimming box 10 is disposed on the light emitting side of the display box 30, the dimming box 10 is used for controlling the viewing angle of the display panel, and the display box 30 is used for controlling the display panel to display a normal picture. It is understood that the dimming box 10 may also be disposed below the display box 30, i.e. the dimming box 10 is located on the light incident side of the display box 30. The dimming box 10 comprises an upper substrate 11, a lower substrate 12 arranged opposite to the upper substrate 11 and a first liquid crystal layer 13 arranged between the upper substrate 11 and the lower substrate 12, wherein the upper substrate 11 is positioned on the light emergent side of the lower substrate 12, the upper substrate 11 comprises a first viewing angle electrode 111, and the lower substrate 12 comprises a metal layer 120, a second viewing angle electrode 121 matched with the first viewing angle electrode 111 and a reflecting layer 123 closer to the first liquid crystal layer 13 than the second viewing angle electrode 121. The second viewing angle electrode 121 is covered on the metal layer 120, and the reflective layer 123 is used as a protective layer to cover the second viewing angle electrode 121. Controlling the deflection of the liquid crystal molecules in the first liquid crystal layer 13 by controlling the pressure difference between the first viewing angle electrode 111 and the second viewing angle electrode 121, thereby achieving control of the wide-narrow viewing angle switching.

In this embodiment, the reflective layer is disposed on the lower substrate, so that ambient light can be reflected, brightness of the display panel can be improved, and a better narrow viewing angle effect can be obtained; meanwhile, the reflecting layer is used as a protective layer to cover the second visual angle electrode, when the reflecting layer is etched, the sharp angle of the metal layer can be prevented from being etched and hollowed out, so that the second visual angle electrode is prevented from being broken at the sharp angle of the metal layer, the connection between the second visual angle electrode and the metal layer can be ensured to be normal, and the abnormal switching of wide and narrow visual angles can be avoided.

In this embodiment, the second viewing angle electrode 121 may be a full-face electrode, the metal layer 120 is electrically connected to the second viewing angle electrode 121, and the metal layer 120 is used to transmit the electrical signals between the second viewing angle electrode 121 and the outside. In particular, the second viewing angle electrode 121 may be a transparent electrode, for example, an electrode made of an ITO (indium tin oxide) material.

Specifically, the display panel includes a display area a and a non-display area B, the metal layer 120 is disposed in the non-display area B, and the second viewing angle electrode 121 and the reflective layer 123 are disposed in the display area a and the non-display area B. In general, the non-display area B is a frame area of the display panel. Specifically, the reflective layer 123 may include a reflective portion located in the display area a and a protective portion located in the non-display area B such that the protective portion is disposed corresponding to the metal layer 120. Specifically, the second viewing angle electrode 121 forms a sharp corner at the metal layer 120, and the protective portion of the reflective layer 123 covers the sharp corner of the second viewing angle electrode 121.

Specifically, the metal layer 120 may include an aluminum layer and a molybdenum layer disposed at a side near the second viewing angle electrode 121.

Specifically, the reflective layer 123 is located in the display area a, and the reflective layer 123 may be a metal reflective layer. The reflective layer 123 includes a molybdenum layer and an aluminum layer, the aluminum layer being closer to one side of the first liquid crystal layer 13 than the molybdenum layer. The reflective layer 123 can reflect ambient light, and control the switching between wide and narrow viewing angles with the first viewing angle electrode 111 and the second viewing angle electrode 121, so that a better narrow viewing angle effect can be achieved; since the metal reflective layer 123 is provided on the lower substrate 12, a good narrow viewing angle effect can be achieved without providing a compensation film and an APF film between the dimming cartridge 10 and the display cartridge 20, and a wide viewing angle effect is not affected. In addition, since the reflective layer 123 is metal and has conductivity, the reflective layer 123 can also shield signal interference between the dimming case 10 and the display case 20 and prevent generation of static electricity on the display panel.

In particular, the reflective layer 123 may be a grid-like structure. Because the reflecting layer 123 adopts a grid structure, the transmission of the backlight is not affected basically, the intensity of the reflected ambient light is weak, and the display effect of the wide viewing angle is not affected basically because the intensity of the reflected ambient light is weak relative to that of the transparent backlight when the viewing angle is wide. More specifically, the reflective layer 123 in this embodiment has a diamond-shaped grid structure. It is understood that the reflective layer 123 may be a square, hexagonal, or other lattice structure.

Specifically, the reflective layer 123 is in contact with the second viewing angle electrode 121 to be electrically connected, so that the resistance of the second viewing angle electrode 121 can be reduced, and the response speed can be improved.

Specifically, the protective layer 125 may be made of an insulating material.

In this embodiment, the lower substrate 12 further includes a second substrate 127, the metal layer 120 is disposed on the second substrate 127, and the second viewing angle electrode 121 covers the metal layer 120 and a region of the second substrate 127 where the metal layer 120 is not disposed. Specifically, the second substrate 127 may be a glass substrate or a plastic substrate.

In this embodiment, the lower substrate 12 further includes a first insulating layer 128, the first insulating layer 128 covers the reflective layer 123, and the first insulating layer 128 is located on a side of the lower substrate 12 facing the first liquid crystal layer 13. It is understood that the first insulating layer 128 may be omitted, and when the first insulating layer 128 is omitted from the lower substrate 12, a protective layer is required to be disposed on a side of the upper substrate 11 facing the first liquid crystal layer 13.

The upper substrate 11 and the first liquid crystal cell 13 of the dimming cell 10 of the present embodiment are substantially the same as the upper substrate 11 and the first liquid crystal cell 13 of the dimming cell 10 of the first embodiment, and will not be described herein. The specific structure of the display case 30 is also substantially the same as that of the display case 30 of the first embodiment, and will not be described again here.

It is understood that, in other embodiments, the dimming box 10 of the present embodiment may also be disposed on the light incident side of the display box 30; alternatively, the dimming box 10 of the present embodiment may be provided on each of the light emitting side and the light entering side of the display box 30.

The following describes a method for manufacturing the display panel of the present embodiment.

Fig. 7a to 7d are schematic structural diagrams illustrating a process of manufacturing the lower substrate of the display panel in fig. 6, and the manufacturing method of the display panel of the present embodiment includes the following steps:

s31, as shown in fig. 7a, providing a second substrate 127, forming a metal layer 120 on the second substrate 127, providing a first mask plate with a pattern, exposing the metal layer 120 with the first mask plate as a mask, developing the metal layer 120, removing the metal material in the exposed area, and patterning the metal layer 120.

S33, as shown in fig. 7b, the second viewing angle electrode 121 is covered on the metal layer 120. The second viewing angle electrode 121 covers the metal layer 120 and the region of the second substrate 127 where the metal layer 120 is not disposed.

And S35, as shown in fig. 7c, another metal layer is formed on the second viewing angle electrode 121, and a third mask plate with a pattern is provided, the third mask plate is used as a mask to expose the another metal layer, then the another metal layer is subjected to development treatment, the metal material of the exposed area is removed, and the another metal layer is patterned to form the reflective layer 123.

S37, as shown in fig. 7d, a first insulating layer 128 is covered on the reflective layer 123. The first insulating layer 128 covers the reflective layer 123 and the region of the second viewing angle electrode 121 where the reflective layer 123 is not disposed.

S39, providing the upper substrate 11 and the first liquid crystal layer 13, and performing a box forming process on the lower substrate 12, the upper substrate 11 and the first liquid crystal layer 13, wherein the first liquid crystal layer 13 is sealed between the lower substrate 12 and the upper substrate 11, thereby forming the dimming box 10.

S41, providing the display case 30, and bonding the light modulation case 10 and the display case 30. The display box 30 is preferably a liquid crystal box, however, in other embodiments, the display box 30 may be a self-luminous display (e.g. OLED display, micro led display), but the dimming box 10 needs to be disposed above the display box 30.

Fifth embodiment

Fig. 8 is a schematic cross-sectional view of a display device according to a fifth embodiment of the present utility model, please refer to fig. 8, and the present utility model further provides a display device including a display panel and a backlight module 50 according to the first embodiment. The backlight module 50 is located below the display panel and is used for providing backlight source for the display panel. Of course, if the display case 30 employs a self-luminous display, the display device does not need to be additionally provided with a backlight.

In this embodiment, the backlight module 50 includes a backlight source 51 and a peep-proof layer 53, and the peep-proof layer 53 is used for reducing the range of the light emitting angle. A brightness enhancement film 52 is further disposed between the backlight source 51 and the peep-proof layer 53, and the brightness enhancement film 52 increases the brightness of the backlight module 50. The peep-proof layer 53 is a micro shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through the shutter structure, and the angle range of the light passing through the peep-proof layer 53 is reduced. The peep-proof layer 53 comprises a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and light-absorbing materials are arranged on two sides of the light-resisting walls. Of course, the backlight 51 may be a light-collecting type backlight, so that the peep-proof layer 53 is not required.

The backlight module 50 may be a side-in type backlight module or a direct type backlight module. Preferably, the backlight module 50 adopts a collimated backlight (CBL, collimated backlight) mode, which can collect light to ensure display effect.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (15)

1. The utility model provides a wide and narrow visual angle switchable display panel, its characterized in that includes dimming box (10) and display box (30) that range upon range of setting each other, dimming box (10) include upper substrate (11), with lower base plate (12) that upper substrate (11) set up relatively and locate first liquid crystal layer (13) between upper substrate (11) and lower base plate (12), upper substrate (11) are located the play light side of lower base plate (12), upper substrate (11) include first visual angle electrode (111), lower base plate (12) include metal layer (120), with first visual angle electrode (111) matched with second visual angle electrode (121), compare second visual angle electrode (121) are nearer first liquid crystal layer (13) reflection stratum (123) and be located between second visual angle electrode (121) and reflection stratum (123), second visual angle electrode (121) cover in metal layer (120) top layer (125) cover.

2. The display panel according to claim 1, wherein the display panel comprises a display area (a) and a non-display area (B), the metal layer (120) is disposed in the non-display area (B), the reflective layer (123) is disposed in the display area (a), the second viewing angle electrode (121) and the protective layer (125) are disposed in the display area (a) and the non-display area (B), the second viewing angle electrode (121) forms a sharp corner at the metal layer (120), and the protective layer (125) covers the sharp corner of the second viewing angle electrode (121).

3. The wide-narrow viewing angle switchable display panel according to any of claims 1-2, characterized in that the reflective layer (123) is a grid-like structure.

4. A display panel switchable between wide and narrow viewing angles according to any of claims 1-2, characterized in that the reflective layer (123) comprises a molybdenum layer and an aluminum layer, which aluminum layer is closer to one side of the first liquid crystal layer (13) than the molybdenum layer.

5. The wide-narrow viewing angle switchable display panel according to any of claims 1-2, characterized in that the dimming box (10) is located at the light exit side of the display box (30); or, the dimming box (10) is positioned on the light incident side of the display box (30); alternatively, the light-emitting side and the light-entering side of the display box (30) are respectively provided with the dimming box (10).

6. The display panel according to any one of claims 1-2, wherein the second viewing angle electrode (121) is a full-face electrode, and the metal layer (120) is electrically connected to the second viewing angle electrode (121).

7. The display panel with switchable wide and narrow viewing angles according to any one of claims 1-2, wherein the display box (30) comprises a color film substrate (31), an array substrate (32) arranged opposite to the color film substrate (31), and a second liquid crystal layer (33) arranged between the color film substrate (31) and the array substrate (32); the display panel further comprises a first polaroid (60), a second polaroid (70) and a third polaroid (80), wherein the first polaroid (60) is arranged between the dimming box (10) and the display box (30), the second polaroid (70) is arranged on one side, far away from the display box (30), of the dimming box (10), and the third polaroid (80) is arranged on one side, far away from the dimming box (10), of the display box (30).

8. The utility model provides a wide and narrow visual angle switchable display panel, its characterized in that includes dimming box (10) and display box (30) that range upon range of setting each other, dimming box (10) include upper substrate (11), with lower base plate (12) that upper substrate (11) set up relatively and locate first liquid crystal layer (13) between upper substrate (11) and lower base plate (12), upper substrate (11) are located the play light side of lower base plate (12), upper substrate (11) include first visual angle electrode (111), lower base plate (12) include metal layer (120), with second visual angle electrode (121) that first visual angle electrode (111) cooperatees and compare second visual angle electrode (121) are nearer first liquid crystal layer (13) reflection stratum (123), second visual angle electrode (121) cover on metal layer (120), reflection stratum (123) are as the protective layer cover on second visual angle electrode (121).

9. The display panel according to claim 8, wherein the display panel comprises a display area (a) and a non-display area (B), the metal layer (120) is disposed in the non-display area (B), the reflective layer (123) is disposed in the display area (a), the second viewing angle electrode (121) and the reflective layer (123) are disposed in the display area (a) and the non-display area (B), the second viewing angle electrode (121) forms a sharp corner at the metal layer (120), and the reflective layer (123) covers the sharp corner of the second viewing angle electrode (121).

10. The wide-narrow viewing angle switchable display panel according to any of claims 8-9, characterized in that the reflective layer (123) is a grid-like structure.

11. A display panel switchable wide and narrow viewing angle according to any of claims 8-9, characterized in that the reflective layer (123) comprises a molybdenum layer and an aluminum layer, which aluminum layer is closer to one side of the first liquid crystal layer (13) than the molybdenum layer.

12. The wide-narrow viewing angle switchable display panel according to any of claims 8-9, characterized in that the dimming box (10) is located at the light exit side of the display box (30); or, the dimming box (10) is positioned on the light incident side of the display box (30); alternatively, the light-emitting side and the light-entering side of the display box (30) are respectively provided with the dimming box (10).

13. The display panel according to any one of claims 8-9, wherein the second viewing angle electrode (121) is a full-face electrode, and the metal layer (120) is electrically connected to the second viewing angle electrode (121).

14. The display panel according to any one of claims 8 to 9, wherein the display box (30) comprises a color film substrate (31), an array substrate (32) disposed opposite to the color film substrate (31), and a second liquid crystal layer (33) disposed between the color film substrate (31) and the array substrate (32); the display panel further comprises a first polaroid (60), a second polaroid (70) and a third polaroid (80), wherein the first polaroid (60) is arranged between the dimming box (10) and the display box (30), the second polaroid (70) is arranged on one side, far away from the display box (30), of the dimming box (10), and the third polaroid (80) is arranged on one side, far away from the dimming box (10), of the display box (30).

15. A display device comprising a backlight module (50) and a display panel with switchable wide and narrow viewing angles according to any one of claims 1-14, the backlight module (50) being located below the display panel.