A display module

Abstract

The present application provides a display module, which includes a first viewing angle and a second viewing angle, wherein the second viewing angle is greater than the first viewing angle. The display module includes a first display portion and a second display portion, wherein the visible range of the first display portion corresponds to the first viewing angle, and the visible range of the second display portion corresponds to the second viewing angle. The display module includes a light-emitting functional layer and a dimming structure, wherein the dimming structure includes a first optical structure provided corresponding to the first display portion and a second optical structure provided corresponding to the second display portion. The light emitted by the light-emitting functional layer passes through the first optical structure, and displays the first picture at the first viewing angle on the first display portion. The light emitted by the light-emitting functional layer passes through the second optical structure, and displays the second picture at the second viewing angle on the second display portion. Thus, the first picture can be seen at a small viewing angle through the first optical structure, and the second picture can be seen at a large viewing angle through the second optical structure, thereby realizing a display screen based on the concept of dual vision.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module. Background Art

[0002] Display products are now widely used in personal display devices. To protect user privacy, the demand for display devices with privacy protection is expected to become increasingly common. Currently, the main privacy films are based on the principle of a Venetian blind structure. While these privacy films can achieve privacy protection, they significantly reduce the surface brightness of the display device, which is a significant drawback.

[0003] In recent years, with the addition of audio and video entertainment screens in the passenger seat of cars, how to prevent the main driver from seeing the entertainment content to ensure the main driver's safety has become a hot research topic.

[0004] Application Contents

[0005] The purpose of this application is to provide a display module, aiming to realize the dual-view function of the display module.

[0006] The present application provides a display module, comprising a first viewing angle and a second viewing angle, wherein the second viewing angle is greater than the first viewing angle; the display module comprises a first display portion and a second display portion, wherein the visual range of the first display portion corresponds to the first viewing angle, and the visual range of the second display portion corresponds to the second viewing angle;

[0007] The display module includes a dimming structure, and the dimming structure includes a first optical structure corresponding to the first display portion and a second optical structure corresponding to the second display portion;

[0008] The display module includes a light-emitting functional layer, and the light emitted by the light-emitting functional layer passes through the first optical structure to display a first picture at the first viewing angle on the first display part; the light emitted by the light-emitting functional layer passes through the second optical structure to display a second picture at the second viewing angle on the second display part.

[0009] In some embodiments, the projections of the first optical structure in a direction perpendicular to the display module and the projections of the second optical structure in a direction perpendicular to the display module are alternately arranged.

[0010] In some embodiments, the display module includes a liquid crystal cell assembly, and the light-emitting functional layer includes a light source assembly;

[0011] The light source assembly includes a light guide plate and a side light source arranged on one side of the light guide plate, the light guide plate has a light emitting surface, and one side of the light emitting surface of the light guide plate has a lattice structure;

[0012] The liquid crystal box assembly is arranged on the light emitting surface side of the light guide plate, and the first optical structure and the second optical structure are arranged between the liquid crystal box assembly and the light source assembly;

[0013] The first optical structure includes a first inverse prism having a first reflective surface, and the light from the light source assembly passes through the first reflective surface to provide the first viewing angle;

[0014] The second optical structure includes a second inverse prism having a second reflective surface. The light from the light source assembly passes through the second reflective surface to provide the second viewing angle.

[0015] In some embodiments, the second inverse prisms and the first inverse prisms are disposed on the same prism film.

[0016] In some embodiments, the cross-sectional shapes of the first inverse prism and the second inverse prism along a direction perpendicular to the plane of the prism film are triangular, and the cross-sectional triangle of the first inverse prism is different from the cross-sectional triangle of the second inverse prism;

[0017] An included angle between the first reflective surface and the plane where the light guide plate is located is greater than an included angle between the second reflective surface and the plane where the light guide plate is located.

[0018] In some embodiments, the display module includes a liquid crystal cell assembly, and the light-emitting functional layer includes a light source assembly;

[0019] The light source assembly includes a light guide plate and a side light source arranged on one side of the light guide plate, wherein the light guide plate has a light emitting surface;

[0020] The liquid crystal cell assembly is arranged on the light emitting surface side of the light guide plate;

[0021] The first optical structure includes an anti-privacy film, which is arranged on a light-emitting surface side of the light guide plate to provide the first viewing angle.

[0022] In some embodiments, the liquid crystal box assembly includes a color filter substrate, a driving substrate, and a liquid crystal layer disposed between the color filter substrate and the driving substrate, the color filter substrate includes a blank portion, and the second optical structure is disposed corresponding to the blank portion;

[0023] The second optical structure includes a metal structure having a reflective surface. Light emitted from the light guide plate passes through the privacy film and is reflected on the reflective surface to provide the second viewing angle.

[0024] In some embodiments, the color filter substrate further includes a color resist layer, the color resist layer includes red color resist, green color resist and blue color resist, and the metal structure is disposed in the same layer as the color resist layer.

[0025] In some embodiments, the metal structure is used as an electrode to control the deflection of the liquid crystal layer.

[0026] In some embodiments, the light-emitting functional layer includes a display unit, and a plurality of the display units are arranged at intervals;

[0027] The first optical structure includes a vertical blocking structure, and the vertical blocking structure is arranged between two adjacent display units;

[0028] The second optical structure includes an L-shaped shielding structure, and the L-shaped shielding structure includes a vertical portion and a shielding portion. The vertical portion is arranged between two adjacent display units, and the shielding portion is arranged on the display unit.

[0029] The present application provides a display module, which includes a first viewing angle and a second viewing angle, wherein the second viewing angle is greater than the first viewing angle. The display module includes a first display portion and a second display portion, wherein the visible range of the first display portion corresponds to the first viewing angle, and the visible range of the second display portion corresponds to the second viewing angle. The display module includes a light-emitting functional layer and a dimming structure, wherein the dimming structure includes a first optical structure provided corresponding to the first display portion and a second optical structure provided corresponding to the second display portion. The light emitted by the light-emitting functional layer passes through the first optical structure, and a first picture is displayed at the first viewing angle on the first display portion. The light emitted by the light-emitting functional layer passes through the second optical structure, and a second picture is displayed at the second viewing angle on the second display portion. Thus, the first picture can be seen at a small viewing angle through the first optical structure, and the second picture can be seen at a large viewing angle through the second optical structure, thereby realizing a display screen based on the concept of dual vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0031] Figure 1 is a schematic diagram of application scenarios of display modules provided in some embodiments of the present application;

[0032] Figure 2 is a schematic structural diagram of a display module provided in some embodiments of the present application;

[0033] Figure 3 is a schematic diagram of a second screen provided by a display module provided in some embodiments of the present application;

[0034] Figure 4 is a schematic diagram of the optical path of a first inverse prism provided in some embodiments of the present application;

[0035] Figure 5 is a schematic diagram of the optical path of a second inverse prism provided in some embodiments of the present application;

[0036] Figure 6 is a schematic structural diagram of a display module provided in some embodiments of the present application;

[0037] Figure 7 This is a schematic structural diagram of a display module provided in some embodiments of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0040] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0042] See also Figure 1 , Figure 1 This is a schematic diagram of the application scenario of the display module provided by some embodiments of the present application. Please also refer to Figure 2 , Figure 2 This is a schematic structural diagram of a display module provided in some embodiments of the present application.

[0043] The display module 100 can be applied to various displays, such as liquid crystal displays (LCDs), organic light-emitting diode displays (OLEDs), and mini light-emitting diode displays (Mini LEDs). The display module 100 can also be applied to various electronic devices, such as wearable devices like smart bracelets and smart watches, VR (virtual reality) devices, mobile phones, e-books and e-newspapers, televisions, personal laptops, and foldable and rollable flexible display and lighting devices.

[0044] like Figure 1 As shown, the display module 100 includes a first viewing angle D1 and a second viewing angle D2. The range of the second viewing angle D2 is greater than the range of the first viewing angle D1. Different viewing angles refer to different angles of emitted light, so the viewing angles of the viewer are different. For example, the first viewing angle D1 is 0 to ±30°, and the second viewing angle D2 is

[0045] The first and second viewing angles can range from ±30° to ±90°, and the ranges can be determined based on actual conditions, and are not limited in this application. Accordingly, the display module 100 includes a first display portion and a second display portion (not shown in the figure). The visual range of the first display portion corresponds to the first viewing angle D1, and the visual range of the second display portion corresponds to the second viewing angle D2.

[0046] like Figure 2 As shown, the display module 100 includes a light-emitting functional layer and a dimming structure. The dimming structure includes a first optical structure 11 corresponding to the first display portion and a second optical structure 12 corresponding to the second display portion. The first optical structure 11 uses light emitted by the light-emitting functional layer to provide a first viewing angle, and the second optical structure 12 uses light emitted by the light-emitting functional layer to provide a second viewing angle.

[0047] In some embodiments, light emitted by the light-emitting functional layer passes through the first optical structure 11, and displays a first image at the first viewing angle D1 on the first display portion. Light emitted by the light-emitting functional layer passes through the second optical structure 12, and displays a second image at the second viewing angle D2 on the second display portion.

[0048] In some embodiments, the projection of the first optical structure 11 in the direction (Z) perpendicular to the display module 100 and the projection of the second optical structure 12 in the direction (Z) perpendicular to the display module are alternately arranged.

[0049] In some embodiments, the display module 100 can be applied to an in-vehicle display screen, which can be located directly in front of the front passenger seat B. The first viewing angle D1 is toward the front passenger seat B, and the second viewing angle D2 is toward the main driver seat A. Therefore, both the main driver seat A and the front passenger seat B can see the display screen. The main driver seat A can see the second screen, while the front passenger seat B can see the first screen, thus achieving a dual-view display function. Compared to a solution where only the front passenger seat B can see the display screen, the dual-view display solution of the present application can fully utilize the light emitted by the light-emitting functional layer, thereby improving light utilization efficiency.

[0050] The first screen can be a dynamic entertainment screen to provide entertainment for the viewer in the front passenger seat. The second screen can be a fixed static screen, such as displaying the vehicle logo or a specific pattern, to reduce interference with the viewer in the main driver seat A and ensure their safety.

[0051] See also Figure 3 , Figure 3 Schematic diagram of a second screen provided by a display module according to some embodiments of the present application. The second screen may be a double-column graphic pattern.

[0052] like Figure 2 As shown, the display module 100 includes a light-emitting functional layer, a first optical structure 11, a second optical structure 12, and a liquid crystal cell assembly 13. The light-emitting functional layer includes a light source assembly 10, which includes a light guide plate 101 and a side light source 102 disposed on one side of the light guide plate 101. The light guide plate 101 has a light-emitting surface, and one side of the light-emitting surface of the light guide plate has a dot structure (not shown). The liquid crystal cell assembly 13 is disposed on the light-emitting surface of the light guide plate 101, and the first optical structure 11 and the second optical structure 12 are disposed between the liquid crystal cell assembly 13 and the light source assembly 10.

[0053] The first optical structure 11 includes a first inverse prism 111, which provides the first viewing angle D1. Specifically, the dot structure can adjust the light output angle of the outgoing light so that the outgoing light is concentrated at an angle between 10° and 30°, for example, 27°, which is the angle between the outgoing light of the light guide plate 101 and the surface of the light guide plate 101.

[0054] In some embodiments, both the upper surface and the lower surface of the light guide plate 101 may have the lattice structure to adjust the light output angle.

[0055] The second optical structure 12 includes a second inverse prism 121 disposed above the light guide plate 101 , and the second inverse prism 121 provides the second viewing angle D2 .

[0056] In some embodiments, the second inverse prisms 121 and the first inverse prisms 111 may be disposed on a prism film 120 by embossing.

[0057] In other embodiments, the second inverse prism 121 and the first inverse prism 111 may be separate prism films.

[0058] In some embodiments, the display module 100 may further include a reflective film 14 located below the light guide plate 101 to improve light extraction efficiency.

[0059] See also Figure 4 and Figure 5 , Figure 4 is a schematic diagram of the optical path of the first inverse prism provided in some embodiments of the present application, Figure 5 This is a schematic diagram of the optical path of the second inverse prism provided in some embodiments of the present application.

[0060] The first inverse prism 111 has a first reflective surface 111a, and the light from the light source assembly 10 passes through the first reflective surface 111a to provide the first viewing angle D1. The second inverse prism 121 has a second reflective surface 121a, and the light from the light source assembly 10 passes through the second reflective surface 121a to provide the second viewing angle D2.

[0061] In some embodiments, the cross-sectional shapes of the first inverse prism 111 and the second inverse prism 121 along the direction perpendicular to the plane of the prism film 120 (XZ plane) are triangular, but the cross-sectional triangle of the first inverse prism 111 is different from the cross-sectional triangle of the second inverse prism 121 .

[0062] Specifically, the cross-sectional triangle of the first inverse prism 111 is an equilateral triangle, and light emitted from the light guide plate 101 can be reflected or totally reflected on the inner surface of the first inverse prism 111, thereby adjusting the direction of the emitted light to the direction of the first viewing angle D1. Light emitted from the light guide plate 101 can be reflected or totally reflected on the inner surface of the second inverse prism 121, thereby adjusting the direction of the emitted light to the direction of the second viewing angle D2, thereby emitting light in an oblique direction.

[0063] In some embodiments, the first inverse prism 111 has a triangular cross-section with a first reflective surface 111a, and light emitted from the light guide plate 101 is reflected on the first reflective surface 111a. The second inverse prism 121 has a triangular cross-section with a second reflective surface 121a, and light emitted from the light guide plate 101 is reflected on the second reflective surface 121a. The angle between the first reflective surface 111a and the plane of the light guide plate 101 is greater than the angle between the second reflective surface 121a and the plane of the light guide plate 101.

[0064] See also Figure 6 , Figure 6 This is a schematic structural diagram of a display module provided in some embodiments of the present application.

[0065] The display module 200 includes a light-emitting functional layer, a first optical structure 21, a second optical structure 22 and a liquid crystal box assembly 23. The light-emitting functional layer includes a light source assembly 20. The light source assembly 20 includes a light guide plate 201 and a side light source 202 arranged on one side of the light guide plate 201. The light guide plate 201 has a light emitting surface, and the liquid crystal box assembly 23 is arranged on the side of the light emitting surface of the light guide plate 201.

[0066] The first optical structure 21 includes a privacy film 211 disposed on the light-emitting surface of the light guide plate 201. The privacy film 211 provides the first viewing angle D1. The light emission angle of the first viewing angle D1 can be approximately 30°, allowing the liquid crystal cell assembly 23 to emit light at a narrow angle. The privacy film 211 can have a louver-like grating structure, such as a 3M PC film. The specific structure of the privacy film 211 is not limited in this application.

[0067] The liquid crystal cell assembly 23 may specifically include a color filter substrate 231 and a driving substrate 232 disposed opposite each other, and a liquid crystal layer 233 located between the color filter substrate 231 and the driving substrate 232. The color filter substrate includes a color resist layer 234 and a blank portion 235. The color resist layer 234 includes red, green, and blue color resists. The second optical structure 22 is disposed corresponding to the blank portion 235.

[0068] The second optical structure 22 may include a metal structure 221 having a reflective surface. The metal structure 221 is located above the privacy film 211 and can reflect part of the light emitted from the privacy film 211 on the reflective surface to adjust part of the light of the first viewing angle D1 to the second viewing angle D2.

[0069] In some embodiments, the metal structure 221 and the color resist layer 234 are disposed on the same layer.

[0070] In some embodiments, the cross-section of the metal structure 221 may be an inverted trapezoid, and light is reflected from the side surfaces of the inverted trapezoid.

[0071] In some embodiments, the metal structure 221 can serve as an electrode, which can provide a vertical electric field to control the deflection of the liquid crystal layer 233 .

[0072] See also Figure 7 , Figure 7 This is a schematic structural diagram of a display module provided in some embodiments of the present application.

[0073] The display module 300 includes a light-emitting functional layer, a first optical structure 31 and a second optical structure 32 . The light-emitting functional layer includes a display unit 30 , such as a Mini LED or a Micro-LED. A plurality of the display units 30 are arranged at intervals.

[0074] The first optical structure 31 includes a vertical shielding structure, which is disposed between two adjacent display units 30. Since the vertical shielding structure can shield light from both sides of the display unit 30 and control the emitted light to a smaller angle, a first viewing angle D1 can be provided.

[0075] The second optical structure 32 includes an L-shaped shielding structure, which includes a vertical portion and a shielding portion. The vertical portion is disposed between two adjacent light-emitting functional layers, and the shielding portion is disposed on the light-emitting functional layers. Because the L-shaped shielding structure shields half of the display unit 30, the display unit 30 can emit light sideways, providing a second viewing angle D2.

[0076] The display module provided in the present application includes a first viewing angle and a second viewing angle, and the second viewing angle is greater than the first viewing angle. The display module includes a first display part and a second display part, the visible range of the first display part corresponds to the first viewing angle, and the visible range of the second display part corresponds to the second viewing angle. The display module includes a light-emitting functional layer and a dimming structure, and the dimming structure includes a first optical structure provided corresponding to the first display part and a second optical structure provided corresponding to the second display part. The light emitted by the light-emitting functional layer passes through the first optical structure, and the first picture is displayed at the first viewing angle in the first display part. The light emitted by the light-emitting functional layer passes through the second optical structure, and the second picture is displayed at the second viewing angle in the second display part. In this way, the first picture can be seen at a small viewing angle through the first optical structure, and the second picture can be seen at a large viewing angle through the second optical structure, so that a display screen based on the concept of dual vision can be realized.

[0077] The description of the above embodiments is only used to help understand the technical solutions and core ideas of this application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, characterized in that: The display module includes a first viewing angle and a second viewing angle, the second viewing angle being greater than the first viewing angle; the display module includes a first display portion and a second display portion, the visual range of the first display portion corresponds to the first viewing angle, and the visual range of the second display portion corresponds to the second viewing angle; The display module includes a dimming structure, and the dimming structure includes a first optical structure corresponding to the first display portion and a second optical structure corresponding to the second display portion; The display module includes a light-emitting functional layer, and light emitted by the light-emitting functional layer passes through the first optical structure to display a first image at the first viewing angle on the first display portion; The light emitted by the light-emitting functional layer passes through the second optical structure, and displays a second picture at the second viewing angle on the second display portion; The display module includes a liquid crystal box assembly, the light-emitting functional layer includes a light source assembly, and the liquid crystal box assembly is arranged on the light-emitting surface side of the light source assembly; the first optical structure includes an anti-peep film, and the anti-peep film is arranged between the light source assembly and the liquid crystal box assembly to provide the first viewing angle; the liquid crystal box assembly includes a color film substrate, a driving substrate, and a liquid crystal layer arranged between the color film substrate and the driving substrate, the color film substrate includes a blank portion, and the second optical structure is arranged corresponding to the blank portion; the second optical structure includes a metal structure with a reflective surface, and the light emitted from the light guide plate passes through the anti-peep film and is reflected on the reflective surface to provide the second viewing angle.

2. The display module according to claim 1, wherein: The light source assembly includes a light guide plate and a side light source arranged on one side of the light guide plate, wherein the light guide plate has a light emitting surface; The liquid crystal cell assembly is arranged on the light emitting surface side of the light guide plate; The anti-peep film is arranged between the light guide plate and the liquid crystal box assembly.

3. The display module according to claim 1, wherein: The color filter substrate further includes a color resist layer, which includes red color resist, green color resist and blue color resist. The metal structure is provided in the same layer as the color resist layer.

4. The display module according to claim 1, wherein: The metal structure is used as an electrode to control the deflection of the liquid crystal layer.

Images