Anti-peeping display panel, anti-peeping display device, manufacturing method and use method

Abstract

The present invention discloses an anti-peeping display panel, an anti-peeping display device, a manufacturing method and a method of use. The anti-peeping display panel includes a display substrate and an anti-peeping device arranged on the light-emitting side of the display substrate, wherein: the display substrate includes a substrate, a driving circuit layer, an anode, a light-emitting layer, a cathode of a first preset thickness and a light extraction layer of a second preset thickness stacked in sequence on the substrate, and the light emitted from the light extraction layer is quasi-collimated light; the anti-peeping device includes a first film layer with a fixed refractive index and a second film layer with a variable refractive index, the contact surface between the first film layer and the second film layer is a non-planar structure, and the second film layer changes the refractive index in response to the loaded voltage so that the anti-peeping device directly emits or deflects the quasi-collimated light. The embodiment provided by the present invention enables the display panel to be adjusted between anti-peeping display and wide-viewing angle display by limiting the thickness of the cathode and the light extraction layer, and arranging an anti-peeping device with a variable refractive index on the light-emitting side of the display substrate.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an anti-peeping display panel, an anti-peeping display device, a manufacturing method and a using method. Background Art

[0002] OLED display devices are gradually becoming a mainstream device for small and medium-sized display panels. This type of OLED display device mostly uses an active matrix backplane, and the device structure consists of a fully reflective anode, a semi-reflective and semi-transparent cathode, and an organic film in between. The fully reflective anode and the semi-reflective cathode together form a microcavity structure, which plays a role in enhancing the brightness of the device's front light and improving the front color purity.

[0003] Anti-peeping display is one of the special requirements of display panels, that is, for front observers, the panel display is normal, and for observers outside a certain angle (30°), the panel brightness is significantly reduced or the color information is significantly lost, in order to improve the privacy of the displayed information. For traditional anti-peeping displays, it is usually done by setting a shading layer on both sides above the pixel to reduce the light output of the pixel to both sides, or by adding a liquid crystal grating above the panel to reduce the light output viewing angle range of the panel. On the one hand, existing anti-peeping displays require a relatively complex structure to achieve the narrowing of the light output angle, and on the other hand, most of them cannot be flexibly adjusted. The adjustable viewing angle mostly adopts the state conversion of scattering and transmission, and the actual feasibility and applicability are not high. Summary of the invention

[0004] In order to solve at least one of the above problems, the first aspect of the present invention provides an anti-peeping display panel, including a display substrate and an anti-peeping device arranged on the light-emitting side of the display substrate, wherein:

[0005] The display substrate comprises a substrate, a driving circuit layer, an anode, a light-emitting layer, a cathode with a first preset thickness, and a light extraction layer with a second preset thickness, wherein the light emitted from the light extraction layer is quasi-collimated light;

[0006] The anti-peeping device comprises a first film layer with a fixed refractive index and a second film layer with a variable refractive index. The contact surface between the first film layer and the second film layer is a non-planar structure. The second film layer changes its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects collimated light.

[0007] In some optional embodiments, the cathode transmittance is greater than or equal to 15% and less than or equal to 40%, the first preset thickness is greater than or equal to 15nm and less than or equal to 25nm, and the second preset thickness is greater than or equal to 85nm and less than or equal to 150nm.

[0008] In some optional embodiments, the first film layer has a first refractive index, and the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage:

[0009] The first film layer is disposed on a side of the second film layer close to the display substrate, and when the second refractive index is equal to the first refractive index, the quasi-collimated light is directly emitted after passing through the first film layer and the second film layer, otherwise, the quasi-collimated light is deflected and emitted after passing through the first film layer and the second film layer;

[0010] or

[0011] The first film layer is arranged on a side of the second film layer away from the display substrate. When the second refractive index is equal to the first refractive index, the quasi-collimated light is directly emitted after passing through the second film layer and the first film layer. Otherwise, the quasi-collimated light is deflected and emitted after passing through the second film layer and the first film layer.

[0012] In some optional embodiments, the second film layer is a positive liquid crystal film layer or a negative liquid crystal film layer.

[0013] In some optional embodiments, the device further includes a touch layer disposed on the light emitting side of the display substrate and a polarizer disposed on a side of the touch layer away from the display panel.

[0014] The anti-peeping device is arranged on a side of the touch layer close to the display panel;

[0015] or

[0016] The anti-peeping device is arranged between the touch layer and the polarizer.

[0017] In some optional embodiments, the contact surface between the first film layer and the second film layer is one of a conical structure, a spherical structure, a rod-shaped structure and an irregular shape structure;

[0018] and / or

[0019] The display substrate is top emitting.

[0020] A second aspect of the present invention provides an anti-peeping display device, comprising the anti-peeping display panel described above.

[0021] A third aspect of the present invention provides a method for manufacturing the above-mentioned anti-peeping display panel, characterized by comprising:

[0022] forming a display substrate, the display substrate comprising a substrate, a driving circuit layer, an anode, a light-emitting layer, a cathode with a first preset thickness, and a light extraction layer with a second preset thickness, wherein the light emitted from the light extraction layer is quasi-collimated light;

[0023] An anti-peeping device is formed on the light-emitting side of the display substrate, and the anti-peeping device includes a first film layer with a fixed refractive index and a second film layer with a variable refractive index. The contact surface between the first film layer and the second film layer is a non-planar structure, and the second film layer changes its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects the emitted collimated light.

[0024] In some optional embodiments,

[0025] Forming the display substrate further includes: forming a cathode having a transmittance greater than or equal to 15% and less than or equal to 40%, a first preset thickness greater than or equal to 15nm and less than or equal to 25nm, and a second preset thickness greater than or equal to 85nm and less than or equal to 150nm;

[0026] and / or

[0027] The method of forming an anti-peeping device on the light-emitting side of the display substrate further comprises: a contact surface between the first film layer and the second film layer is one of a conical structure, a spherical structure, a rod-shaped structure and an irregular shape structure;

[0028] and / or

[0029] Forming an anti-peeping device on the light-emitting side of the display substrate further includes:

[0030] The first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer;

[0031] or

[0032] The first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

[0033] In some optional embodiments,

[0034] After forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer and a polarizer on the anti-peeping device;

[0035] or

[0036] After forming the display substrate and before forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer on the display substrate; after forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a polarizer on the anti-peeping device.

[0037] A fourth aspect of the present invention provides a method for using the anti-peeping display panel described above, comprising:

[0038] The second film layer of the anti-peeping device forms a refractive index that is the same as the refractive index of the first film layer in response to the applied voltage, so that the anti-peeping device directly emits the quasi-collimated light emitted by the display substrate;

[0039] or

[0040] The second film layer of the privacy protection device forms a refractive index that is unequal to that of the first film layer in response to the applied voltage, so that the privacy protection device deflects the quasi-collimated light emitted from the display substrate.

[0041] In some optional embodiments,

[0042] The first film layer has a first refractive index, and the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage:

[0043] The first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer;

[0044] or

[0045] The first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

[0046] The beneficial effects of the present invention are as follows:

[0047] In view of the existing problems, the present invention develops an anti-peeping display panel, an anti-peeping display device, a manufacturing method and a using method, and realizes a microcavity structure with higher strength by limiting the thickness of the cathode and the light extraction layer to form quasi-collimated light. In addition, by arranging a first film layer with a fixed refractive index and a second film layer with a variable refractive index on the light output side of the display substrate, the display panel can be adjusted between an anti-peeping display mode and a wide-viewing angle display mode while ensuring the light output efficiency, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 A schematic cross-sectional view of an anti-peeping display panel according to an embodiment of the present invention is shown.

[0050] Figure 2A schematic diagram showing a second film layer in an anti-peeping display panel according to an embodiment of the present invention is shown.

[0051] Figure 3 Another schematic diagram showing the second film layer in the anti-peeping display panel according to an embodiment of the present invention.

[0052] Figure 4 A simulation diagram showing how the brightness of a display substrate according to an embodiment of the present invention varies with viewing angle relative to a conventional display substrate is shown.

[0053] Figure 5 A schematic cross-sectional view of an anti-peeping display panel according to an embodiment of the present invention during anti-peeping display is shown.

[0054] Figure 6 A schematic cross-sectional view of an anti-peeping display panel according to an embodiment of the present invention during wide-viewing angle display is shown.

[0055] Figure 7 A schematic cross-sectional view of an anti-peeping display panel according to another embodiment of the present invention during anti-peeping display is shown.

[0056] Figure 8 A schematic cross-sectional view of an anti-peeping display panel according to another embodiment of the present invention during wide-viewing angle display is shown.

[0057] Fig. 9 A schematic block diagram of a method for manufacturing an anti-peeping display panel according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0058] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0059] It should be noted that the terms “on…”, “formed on…” and “disposed on…” mentioned herein may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0060] Based on one of the above problems, an embodiment of the present invention provides an anti-peeping display panel, including a display substrate and an anti-peeping device arranged on the light-emitting side of the display substrate, wherein:

[0061] The display substrate comprises a substrate, a driving circuit layer, an anode, a light-emitting layer, a cathode with a first preset thickness, and a light extraction layer with a second preset thickness, wherein the light emitted from the light extraction layer is quasi-collimated light;

[0062] The anti-peeping device comprises a first film layer with a fixed refractive index and a second film layer with a variable refractive index. The contact surface between the first film layer and the second film layer is a non-planar structure. The second film layer changes its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects collimated light.

[0063] In this embodiment, a high-strength microcavity structure is achieved by limiting the thickness of the cathode and the light extraction layer, thereby forming quasi-collimated light in a simple manner. In addition, by providing a first film layer with a fixed refractive index and a second film layer with a variable refractive index on the light output side of the display substrate, the display panel can be adjusted between anti-peeping display and wide-viewing angle display while ensuring the light output efficiency, and has broad application prospects.

[0064] In a specific example, the display panel is described by taking top emission as an example. Figure 1 As shown, the anti-peeping display panel includes a display substrate 110 and an anti-peeping device 120, and the anti-peeping device is arranged on the light-emitting side of the display substrate. The display substrate includes a substrate 111, a driving circuit layer (Capping Layer, CPL) 112 stacked in sequence on the substrate 111, an anode 113, a light-emitting layer 114, a cathode 115 of a first preset thickness, and a light extraction layer 116 of a second preset thickness. The light emitted from the light extraction layer 116 is quasi-collimated light. In the present invention, quasi-collimated light means approximately collimated light, that is, the emitted light rays are approximately parallel. By setting the thickness of the cathode 115 and the light extraction layer 116 to the first preset thickness and the second preset thickness, respectively, a device structure with high microcavity strength is realized, and a quasi-collimated light source can be realized only by limiting the thickness of the cathode 115 and the light extraction layer 116, and the structure is simple.

[0065] It is worth noting that the present application does not specifically limit the emission direction of the display panel, which can be top emission or bottom emission. Those skilled in the art should make a choice based on the actual application scenario to meet the design criteria of the display panel emitting collimated light, which will not be elaborated here.

[0066] In an optional embodiment, considering that the microcavity structure formed by the top-emitting display panel has a better effect on improving the front brightness than the bottom-emitting display panel, and the brightness decays significantly faster with the viewing angle, the display substrate 110 is set to be top-emitting. That is, under the same conditions, the microcavity structure of the top-emitting display panel has a higher microcavity intensity than the microcavity structure of the bottom-emitting display panel, and the emitted light is closer to collimated light.

[0067] It is worth noting that, although not shown in the figure, an encapsulation layer, a touch layer, a polarizer, etc. are also formed on the display substrate 110. The touch layer is arranged on the light-emitting side of the display substrate 110, and the polarizer is arranged on the side of the touch layer away from the display panel. In this embodiment, the anti-peeping device 120 can be arranged above the encapsulation layer and below the touch layer; the anti-peeping device 120 can also be arranged between the touch layer and the polarizer.

[0068] In an optional embodiment, the first preset thickness is greater than or equal to 15 nm and less than or equal to 25 nm, and the second preset thickness is greater than or equal to 85 nm and less than or equal to 150 nm. The transmittance of the corresponding cathode 115 is greater than or equal to 15% and less than or equal to 40%.

[0069] In this embodiment, through the above-mentioned settings, compared with the traditional anti-peeping display panel structure in which the cathode thickness is set in the range of 9-13nm and the thickness of the light extraction layer is set to 60-80nm, this embodiment effectively enhances the microcavity strength by limiting the cathode thickness range and the matching light extraction layer thickness, and effectively simplifies the structure of the display panel on the basis of emitting collimated light.

[0070] by Figure 4 Taking the simulation diagram of as an example, the figure shows the simulation diagram of the device brightness of the top-emitting display substrate with the cathode thickness of the top-emitting display substrate set to 20nm and the cathode thickness of the top-emitting display substrate with the above traditional structure. As shown in the figure, when the cathode thickness is set to 20nm, the light output angle of the display substrate is mainly concentrated in the viewing angle range of ±20° on the front side of the display substrate, which can be regarded as quasi-collimated light, that is, close to collimated light.

[0071] Therefore, through the design of the present invention, the microcavity strength can be improved compared with the traditional display substrate, so as to generate quasi-collimated light that is closer to collimated light with a simple structure.

[0072] In this embodiment, if Figure 1 As shown in FIG. 1 , the contact surface between the first film layer and the second film layer in the anti-peeping device 120 is a non-planar structure. That is, when the refractive index of the first film layer and the refractive index of the second film layer are different, the contact surface between the first film layer and the second film layer forms an "interface", and the quasi-collimated light emitted from the display substrate is refracted at the interface to form divergent light from the approximately parallel light. Specifically, the non-planar structure can be a conical structure as shown in FIG. Figure 3 The present invention is not intended to limit the specific structure of the non-planar structure, as long as it meets the above definition.

[0073] In this embodiment, the refractive index of the first film layer is set to be fixed, and the refractive index of the second film layer is set to be variable. The second film layer changes its refractive index in response to the voltage applied thereto, so that the anti-peeping device 120 directly emits or deflects the quasi-collimated light emitted from the light-emitting side of the display substrate 110. Specifically, when the refractive index of the second film layer is equal to the refractive index of the first film layer, the quasi-collimated light emitted from the light-emitting side of the display substrate 110 is not deflected in the anti-peeping device 120 but is directly emitted. The light-emitting angle is usually a narrow viewing angle of ±20° relative to the plane normal of the display substrate 110, which can still be regarded as quasi-collimated light. In this case, only the viewer facing the anti-peeping display panel can receive the light emitted from the display substrate 110, realizing the anti-peeping display mode. When the refractive index of the second film layer is different from that of the first film layer, the quasi-collimated light incident on the light-emitting side of the display substrate 110 to the anti-peeping device 120 is deflected at the "interface" between the first film layer and the second film layer in the anti-peeping device 120 to form divergent light, which is then emitted at a wide viewing angle. In this case, a wide viewing angle display mode, also called a sharing mode, is achieved.

[0074] In the above manner, by utilizing a contact surface with a non-planar structure and a combination of a first film layer with a fixed refractive index and a second film layer whose refractive index can change in response to a loaded voltage, free switching between an anti-peeping display mode and a wide-viewing angle display mode can be achieved.

[0075] It is worth noting that the present invention is not intended to limit the specific deflection angle generated by the contact surface between the first film layer and the second film layer, nor is it intended to limit the specific refractive index of the first film layer and the second film layer. Those skilled in the art can make choices based on specific design indicators during actual design, and specifically select appropriate structures and material combinations based on the variation range of the second film layer to achieve the design criterion that the quasi-collimated light emitted from the display substrate can be directly emitted or deflected through the anti-peeping device, which will not be repeated here.

[0076] In some optional embodiments, the second film layer 122 is a liquid crystal film layer, such as Figure 5 and Figure 6 As shown, the first film layer 121 is disposed on a side of the second film layer 121 close to the display substrate 110 .

[0077] In this embodiment, the liquid crystal film layer is positive liquid crystal molecules. Figure 5 As shown, the long axis of the liquid crystal molecules of the second film layer 122 is arranged horizontally when no voltage is applied. At this time, the refractive index of the second film layer 122 is the first refractive index n1, that is, the first refractive index n1 is formed in response to the zero voltage applied. The first refractive index n1 is equal to the refractive index of the first film layer 121. The light can directly pass through the anti-peeping device 120 to emit quasi-collimated light without directional deflection, thereby realizing the anti-peeping display mode. Figure 6As shown, when the steering voltage V is applied to the second film layer 122, the arrangement direction of the long axis of the liquid crystal molecules is deflected to form a second refractive index n2, that is, the second refractive index n2 is formed in response to the loaded steering voltage. In order to make the light produce divergent light after passing through the anti-peeping device 120, the loaded voltage needs to make the second refractive index n2 not equal to the refractive index of the first film layer so that the anti-peeping device deflects the output collimated light, thereby realizing a wide-viewing angle mode.

[0078] Those skilled in the art should understand that the present invention is not intended to limit the specific value of the voltage applied to the second film layer 122, as long as the second refractive index n2 formed after the liquid crystal molecules are deflected is not equal to the refractive index of the first film layer, the specific wide viewing angle range after the light is diverged can be determined according to needs.

[0079] In addition, despite Figure 5 and Figure 6 In the illustrated embodiment, the liquid crystal film layer is taken as an example of positive liquid crystal molecules, but it is not intended to be limited to this. The liquid crystal film layer can also be negative liquid crystal molecules. Those skilled in the art should understand that when the liquid crystal film layer is a negative liquid crystal molecule, a suitable liquid crystal film layer should be selected so that when a voltage is applied to the second film layer 122, the refractive index of the second film layer is equal to the refractive index of the first film layer, thereby realizing an anti-peeping display mode; when no voltage is applied, the refractive index of the second film layer is not equal to the refractive index of the first film layer, so that the quasi-collimated light incident on the anti-peeping device can be diverged, thereby realizing a wide-viewing angle mode.

[0080] In some optional embodiments, the second film layer 122 is a liquid crystal film layer, such as Figure 7 and Figure 8 As shown, the first film layer 121 ′ is disposed on a side of the second film layer 122 ′ away from the display substrate 110 .

[0081] In this embodiment, the liquid crystal film layer is a negative liquid crystal molecule. Figure 7 As shown, when the second film layer 122' is applied with a steering voltage V, the long axis direction of the liquid crystal molecules is parallel to the light emitting direction, and the refractive index is the third refractive index n3, that is, the third refractive index n3 is formed in response to the applied voltage, and the third refractive index n3 is equal to the refractive index of the first film layer 121' so that the anti-peeping device 120 directly emits quasi-collimated light without deflection, thereby realizing the anti-peeping display mode. Figure 8As shown, when the second film layer 122' is not applied with a steering voltage, the liquid crystal molecules are oriented to restore and form a fourth refractive index n4, that is, the fourth refractive index n4 is formed in response to the zero voltage applied, and the fourth refractive index n4 is not equal to the refractive index of the first film layer so that the anti-peeping device deflects the emitted collimated light, thereby realizing a wide viewing angle mode. Those skilled in the art should understand that the present invention is not intended to limit the specific value of the voltage applied to the second film layer 122', as long as the third refractive index n3 formed by the liquid crystal molecules after the steering voltage is applied and deflected satisfies the refractive index of the first film layer. In addition, the specific wide viewing angle range after the light is diverged can be determined as needed. Of course, if conditions permit, a steering voltage less than the third refractive index is applied to the second film layer 122', and a wide viewing angle display can also be realized, that is, the divergence angle is less than the divergence angle when zero voltage is applied.

[0082] In addition, although the liquid crystal film layer is a negative liquid crystal molecule in the present embodiment, it is not intended to be limited to this. The liquid crystal film layer may also be a positive liquid crystal molecule. Those skilled in the art should understand that when the liquid crystal film layer is a positive liquid crystal molecule, a suitable liquid crystal film layer should be selected so that when the second film layer 122′ is not subjected to voltage, the refractive index of the second film layer is equal to the refractive index of the first film layer, so that the quasi-collimated light is directly emitted after passing through the anti-peeping device. Accordingly, when voltage is applied, the refractive index of the second film layer is not equal to the refractive index of the first film layer, so that the quasi-collimated light incident on the anti-peeping device can be diverged, thereby realizing a wide-viewing angle mode.

[0083] Corresponding to the anti-peeping display panel, such as Fig. 9 As shown, an embodiment of the present invention further provides a method for manufacturing an anti-peeping display panel, comprising:

[0084] S1: forming a display substrate, the display substrate comprising a substrate, a driving circuit layer, an anode, a light-emitting layer, a cathode with a first preset thickness, and a light extraction layer with a second preset thickness, wherein the light emitted from the light extraction layer is quasi-collimated light;

[0085] S2: forming an anti-peeping device on the light-emitting side of the display substrate, the anti-peeping device comprising a first film layer with a fixed refractive index and a second film layer with a variable refractive index, the contact surface between the first film layer and the second film layer being a non-planar structure, and the second film layer changing its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects the emitted collimated light.

[0086] In this embodiment, a high-strength microcavity structure is achieved by limiting the thickness of the cathode and the light extraction layer, thereby forming quasi-collimated light in a simple manner. In addition, by providing a first film layer with a fixed refractive index and a second film layer with a variable refractive index on the light output side of the display substrate, the display panel can be adjusted between anti-peeping display and wide-viewing angle display while ensuring the light output efficiency, and has broad application prospects.

[0087] It is worth noting that an encapsulation layer, a touch layer, a polarizer, etc. are also formed on the display substrate. Therefore, optionally, after forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer and a polarizer on the anti-peeping device. Alternatively, optionally, after forming the display substrate and before forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer on the display substrate, and after forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a polarizer on the anti-peeping device.

[0088] In some optional embodiments, forming the display substrate further includes: forming a cathode with a transmittance greater than or equal to 15% and less than or equal to 40%, a first preset thickness greater than or equal to 15nm and less than or equal to 25nm, and a second preset thickness greater than or equal to 85nm and less than or equal to 150nm. Through this setting, the microcavity strength generated by the anti-peeping display panel can be significantly enhanced compared to the traditional structure (usually the cathode thickness is, for example, 9-13nm, and the thickness of the light extraction layer is, for example, 60-80nm).

[0089] In some optional embodiments, forming an anti-peeping device on the light-emitting side of the display substrate further includes: the contact surface between the first film layer and the second film layer is one of a conical structure, a spherical structure, a rod-shaped structure and an irregular shape structure. The present invention is not intended to limit the specific structure of the non-planar structure, as long as the above light emission definition is met.

[0090] In some optional embodiments, forming an anti-peeping device on the light-emitting side of the display substrate further includes: the first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer.

[0091] In some optional embodiments, forming an anti-peeping device on the light-emitting side of the display substrate further includes: the first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

[0092] It is worth noting that the liquid crystal film layer can be either positive liquid crystal molecules or negative liquid crystal molecules. Those skilled in the art should select a suitable liquid crystal film layer according to actual application requirements, with the free switching of anti-peep display mode and wide-viewing angle display mode as the design criterion, which will not be elaborated here.

[0093] Based on the same inventive concept, an embodiment of the present invention further provides a method for using the anti-peeping display panel described in the above embodiment, comprising:

[0094] The second film layer of the anti-peeping device forms a refractive index that is the same as the refractive index of the first film layer in response to the applied voltage, so that the anti-peeping device directly emits the quasi-collimated light emitted by the display substrate;

[0095] or

[0096] The second film layer of the privacy protection device forms a refractive index that is unequal to that of the first film layer in response to the applied voltage, so that the privacy protection device deflects the quasi-collimated light emitted from the display substrate.

[0097] In this embodiment, a high-strength microcavity structure is achieved by limiting the thickness of the cathode and the light extraction layer, thereby forming quasi-collimated light in a simple manner. In addition, by providing a first film layer with a fixed refractive index and a second film layer with a variable refractive index on the light output side of the display substrate, the display panel can be adjusted between anti-peeping display and wide-viewing angle display while ensuring the light output efficiency, and has broad application prospects.

[0098] In an optional embodiment, the first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer.

[0099] In another optional embodiment, the first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

[0100] Based on the same inventive concept, an embodiment of the present invention further provides an anti-peeping display device, including the anti-peeping display panel described in the above embodiment. Since the anti-peeping display panel included in the anti-peeping display device provided in the embodiment of the present application corresponds to the anti-peeping display panel provided in the above embodiment, the previous implementation is also applicable to the anti-peeping display device provided in this embodiment, and will not be described in detail in this embodiment.

[0101] In this embodiment, the anti-peeping display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame or a navigator.

[0102] In view of the existing problems, the present invention develops an anti-peeping display panel, an anti-peeping display device, a manufacturing method and a using method, and realizes a microcavity structure with high strength by limiting the thickness of the cathode and the light extraction layer, thereby forming quasi-collimated light in a simple manner. In addition, by arranging a first film layer with a fixed refractive index and a second film layer with a variable refractive index on the light output side of the display substrate, the display panel can ensure the light output efficiency while being able to adjust between anti-peeping display and wide-viewing angle display, and has broad application prospects.

[0103] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. An anti-peeping display panel, characterized in that: It comprises a display substrate and an anti-peeping device arranged on the light-emitting side of the display substrate, wherein: The display substrate comprises a substrate, a driving circuit layer, an anode, a light emitting layer, a cathode with a first preset thickness, and a light extraction layer with a second preset thickness which are sequentially stacked on the substrate, and the light emitted from the light extraction layer is quasi-collimated light; The anti-peeping device comprises a first film layer with a fixed refractive index and a second film layer with a variable refractive index, wherein the contact surface between the first film layer and the second film layer is a non-planar structure, and the second film layer changes its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects the quasi-collimated light; The cathode has a transmittance greater than or equal to 15% and less than or equal to 40%, the first preset thickness is greater than or equal to 15 nm and less than or equal to 25 nm, and the second preset thickness is greater than or equal to 85 nm and less than or equal to 150 nm.

2. The anti-peeping display panel according to claim 1, characterized in that: The first film layer has a first refractive index, and the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage: The first film layer is arranged on a side of the second film layer close to the display substrate, and when the second refractive index is equal to the first refractive index, the quasi-collimated light is directly emitted after passing through the first film layer and the second film layer, otherwise, the quasi-collimated light is deflected and emitted after passing through the first film layer and the second film layer; or The first film layer is arranged on a side of the second film layer away from the display substrate. When the second refractive index is equal to the first refractive index, the quasi-collimated light is directly emitted after passing through the second film layer and the first film layer. Otherwise, the quasi-collimated light is deflected and emitted after passing through the second film layer and the first film layer.

3. The anti-peeping display panel according to claim 2, characterized in that: The second film layer is a positive liquid crystal film layer or a negative liquid crystal film layer.

4. The anti-peeping display panel according to claim 1, characterized in that: It also includes a touch layer arranged on the light-emitting side of the display substrate and a polarizer arranged on a side of the touch layer away from the display panel. The anti-peeping device is arranged on a side of the touch layer close to the display panel; or The anti-peeping device is arranged between the touch layer and the polarizer.

5. The anti-peeping display panel according to any one of claims 1 to 4, characterized in that: The contact surface between the first film layer and the second film layer is one of a conical structure, a spherical structure, a rod-shaped structure and an irregular shape structure; and / or The display substrate is top emitting.

6. An anti-peeping display device, characterized in that: The invention comprises an anti-peeping display panel as claimed in any one of claims 1 to 5.

7. A method for manufacturing the anti-peeping display panel according to any one of claims 1 to 5, characterized in that: include: Forming a display substrate, the display substrate comprising a substrate, a driving circuit layer, an anode, a light emitting layer, a cathode with a first preset thickness and a light extraction layer with a second preset thickness stacked sequentially on the substrate, wherein the light emitted from the light extraction layer is quasi-collimated light; further comprising: forming a cathode with a transmittance greater than or equal to 15% and less than or equal to 40%, the first preset thickness greater than or equal to 15nm and less than or equal to 25nm, and the second preset thickness greater than or equal to 85nm and less than or equal to 150nm; An anti-peeping device is formed on the light-emitting side of the display substrate, and the anti-peeping device includes a first film layer with a fixed refractive index and a second film layer with a variable refractive index. The contact surface between the first film layer and the second film layer is a non-planar structure. The second film layer changes its refractive index in response to a loaded voltage so that the anti-peeping device directly emits or deflects the quasi-collimated light.

8. The method according to claim 7, characterized in that The forming of the anti-peeping device on the light-emitting side of the display substrate further comprises: the contact surface between the first film layer and the second film layer is one of a conical structure, a spherical structure, a rod-shaped structure and an irregular shape structure; and / or The step of forming an anti-peeping device on the light-emitting side of the display substrate further comprises: The first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer; or The first film layer has a first refractive index, the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage, the first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

9. The method according to claim 7, characterized in that: After forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer and a polarizer on the anti-peeping device; or After forming the display substrate and before forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a touch layer on the display substrate; after forming the anti-peeping device on the light-emitting side of the display substrate, the method further includes: forming a polarizer on the anti-peeping device.

10. A method for using the anti-peeping display panel according to any one of claims 1 to 5, characterized in that: include: The second film layer of the anti-peeping device forms a refractive index that is the same as the refractive index of the first film layer in response to the applied voltage, so that the anti-peeping device directly emits the quasi-collimated light emitted by the display substrate; or The second film layer of the privacy protection device forms a refractive index that is unequal to that of the first film layer in response to the applied voltage, so that the privacy protection device deflects the quasi-collimated light emitted from the display substrate.

11. The method according to claim 10, characterized in that The first film layer has a first refractive index, and the second film layer is a liquid crystal film layer and forms a second refractive index with a variable refractive index in response to a loaded voltage: The first film layer is arranged on a side of the second film layer close to the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the first film layer and the second film layer; or The first film layer is arranged on a side of the second film layer away from the display substrate, and the quasi-collimated light is directly emitted or deflected after passing through the second film layer and the first film layer.

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