Display module and display system including the same

Abstract

The present invention provides a display module and a display system including the same. The display module includes a backlight module; a first prism layer, disposed on the backlight module and having a plurality of first prism columns extending along a first direction; a second prism layer, disposed on the first prism layer and having a plurality of second prism columns extending along a second direction transverse to the first direction; and a display panel, disposed on the second prism layer. The first prism columns protrude away from the backlight module and have a triangular first prism cross-section on a virtual plane with the first direction as the normal direction. The second prism columns protrude away from the backlight module and have a triangular second prism cross-section on a virtual plane with the second direction as the normal direction. The vertices of the second prism cross-section are offset relative to the center of the base along the first direction when vertically projected onto the base.

Description

Technical Field

[0001] The present invention relates to a display module and a display system including the same. Specifically, the present invention relates to a display module having a first prism layer and a second prism layer and a display system including the same. Background Art

[0002] With the rapid advancement of modern display technology, the diverse application areas of display devices are gradually increasing and expanding. As mentioned above, heads-up displays (HUDs) that can be integrated into transportation vehicles can provide information while ensuring the driver's field of view, thereby reducing the frequency and time spent looking down at the display. Therefore, to provide safer and more convenient operation, this new interface has gradually become the mainstream model for in-vehicle display devices. However, due to space or design constraints, such HUDs may suffer from drawbacks such as small display area, low display brightness, limited display information, or restricted display objects, making it difficult and / or inconvenient for drivers and / or passengers to read the information. Therefore, to improve convenience and operability for drivers and / or passengers, and facilitate real-time access to various information such as driving speed, navigation instructions, driving status, hardware status, battery and / or fuel levels, and hazard warnings, there is a need to develop HUDs that offer improved display quality, display quality, and display range, while also being able to be integrated into transportation vehicles in a reduced size. Summary of the Invention

[0003] To solve the above-mentioned problem, a display module is proposed according to one embodiment of the present invention, comprising: a backlight module; a first prism layer disposed on the backlight module and having a plurality of first prism columns extending along a first direction; a second prism layer disposed on the first prism layer and having a plurality of second prism columns extending along a second direction transverse to the first direction, wherein the first prism columns and the second prism columns protrude away from the backlight module; and a display panel disposed on the second prism layer. Each first prism column has a first prism cross-section on a virtual plane with the first direction as the normal direction, and each second prism column has a second prism cross-section on a virtual plane with the second direction as the normal direction. The first prism cross-section and the second prism cross-section are triangular. The vertex of the second prism cross-section is offset relative to the center of the base along the first direction when vertically projected onto the base of the second prism cross-section.

[0004] Another embodiment of the present invention provides a display system comprising: a transparent partition having at least partial reflectivity; a display module as described above, disposed on a first side of the transparent partition, with the display panel and the transparent partition forming an acute angle; and a predetermined observation area, located on the first side of the transparent partition and further from the transparent partition than the display module. The first direction extends through the transparent partition. At least a portion of image light emitted by the display panel is reflected by the transparent partition and reaches the predetermined observation area, and ambient light on a second side of the transparent partition at least partially passes through the transparent partition and is incident on the predetermined observation area.

[0005] The display modules and display systems provided according to the various embodiments of the present invention can further increase the amount of light emitted in a predetermined direction based on the arrangement of the first prism layer and the second prism layer, and correspondingly increase the divergence of the emitted light. Based on the above, the display modules and display systems provided according to the various embodiments of the present invention can reflect the divergent emitted light by means of a transparent partition sandwiched with the display module at a predetermined angle, and can reduce or prevent the loss of light emitted in a direction opposite to the predetermined direction, such as by directly passing through the transparent partition. Therefore, the display modules and display systems provided according to the various embodiments of the present invention can brighten the divergent light emitted by the display module in a predetermined direction, and can thereby further present a wide-area virtual image with increased brightness and uniformity through the transparent partition having both perspective and reflective properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 FIG. 1 is an exploded diagram of a display module according to an embodiment of the present invention.

[0007] Figure 2 FIG. 4 is a schematic cross-sectional view of a first prism layer according to an embodiment of the present invention.

[0008] Figure 3 FIG. 4 is a schematic cross-sectional view of a second prism layer according to an embodiment of the present invention.

[0009] Figure 4 Schematic diagram of the divergence and deviation of the emitted light field of light emitted through the first prism layer and the second prism layer according to different embodiments of the present invention.

[0010] Figure 5 FIG. 1 is a schematic diagram comparing the viewing angle difference of the emitted light field of the original light and the offset light according to an embodiment of the present invention.

[0011] Figure 6 FIG. 4 is a cross-sectional diagram of a display module and its light emission viewing angle according to an embodiment of the present invention.

[0012] Figure 7 FIG. 4 is a schematic diagram illustrating an application of a display system including a display module according to another embodiment of the present invention.

[0013] Figure 8 FIG. 4 is a schematic diagram illustrating the configuration directions of the first prism layer and the second prism layer in a display system according to another embodiment of the present invention.

[0014] Figure 9 FIG. 2 is a schematic diagram illustrating an application of a display system for wide-area display according to yet another embodiment of the present invention.

[0015] Wherein, the reference numerals:

[0016] 10, 20, 30: Display module

[0017] 50: Driver

[0018] 100: First prism layer

[0019] 110: First Prism

[0020] 200: Second prism layer

[0021] 220: Second Prism

[0022] 300: Optical components

[0023] 310: First optical layer

[0024] 320: Second optical layer

[0025] 500: virtual image

[0026] 1000: Display system

[0027] 2000: Transportation

[0028] 3000: Display system

[0029] BL: Backlight module

[0030] b1: bottom edge

[0031] b2: bottom edge

[0032] CL, CL': image light

[0033] DP: Display Panel

[0034] D1: First direction

[0035] D2: Second direction

[0036] D3: Third direction

[0037] E1: First side

[0038] E2: Second side

[0039] EB: Preset observation area

[0040] G: Acute angle

[0041] H: Viewing angle

[0042] K1: top angle

[0043] K2: Top Angle

[0044] L, L1, L2: light

[0045] M: Light source

[0046] ML: Ambient Light

[0047] N: Normal

[0048] n1: vertex

[0049] n2: vertex

[0050] O1, O2: Center

[0051] PB1, PB2: Area

[0052] Q, Q0, Q1: Transmitted light field

[0053] T1: First prism profile

[0054] T2: Second prism profile

[0055] VT1: Virtual plane

[0056] VT2: Virtual Plane

[0057] W: Transparent partition DETAILED DESCRIPTION

[0058] Various embodiments are described below, and those skilled in the art should be able to readily understand the spirit and principles of the present invention by referring to the accompanying drawings. However, while specific embodiments are described herein, these embodiments are intended to be illustrative only and are not to be construed as limiting or exhaustive in any respect. Therefore, various variations and modifications of the present invention should be readily apparent and achievable by those skilled in the art without departing from the spirit and principles of the present invention.

[0059] Reference Figure 1According to one embodiment of the present invention, a display module 10 is proposed, which includes: a backlight module BL for generating light, a first prism layer 100 arranged on the backlight module BL, a second prism layer 200 arranged on the first prism layer 100, and a display panel DP arranged on the second prism layer 200 for generating or configuring image light. In addition, according to some embodiments of the present invention, other optical elements 300 may be further configured according to the design of the display module 10. For example, optical elements such as a first optical layer 310 as a light guide plate and a second optical layer 320 as a light expander may be further provided between the backlight module BL and the first prism layer 100 to adjust the light output properties or light output pattern of the backlight module BL. However, what is described here is only an example, and except for Figure 1 The specific aspects are shown. Those skilled in the art can configure or adjust the optical element 300 to be integrated into the desired position of the display module 10 according to other requirements or designs, and these possible variations and details will not be repeated here.

[0060] Continuing from the above, according to this embodiment, the first prism layer 100 may have a plurality of first prism columns 110 extending along a first direction D1, and the second prism layer 200 may have a plurality of second prism columns 220 extending along a second direction D2 that is transverse to the first direction D1. For example, the extension directions of the first prism columns 110 and the second prism columns 220 may be perpendicular to each other. In other words, the first prism columns 110 of the first prism layer 100 and the second prism columns 220 of the second prism layer 200 are arranged orthogonally to each other.

[0061] Continue to refer to Figure 1 , the first prism column 110 and the second prism column 220 both protrude toward the backlight module BL. For example, the first prism column 110 and the second prism column 220 may protrude toward the backlight module BL along the third direction D3. Specifically, together with Figure 1 Reference Figure 2 and Figure 3 , each first prism column 110 may have a first prism cross-section T1 on a virtual plane VT1 with the first direction D1 as a normal direction, and each second prism column 220 may have a second prism cross-section T2 on a virtual plane VT2 with the second direction D2 as a normal direction. Figure 2 and Figure 3 As shown in the enlarged cross-section of , the first prism cross-section T1 and the second prism cross-section T2 can both be triangular and protrude toward the backlight module BL. For example, the first prism column 110 and the second prism column 220 can be strip-shaped extended columns with triangular cross-sections and protrude toward the backlight module BL.

[0062] Specifically, according to some embodiments, the first prism cross section T1 may be formed as a substantially symmetrical triangle, and the second prism cross section T2 may be formed as a substantially asymmetrical triangle. Figure 2 As shown in the partial cross-section of the virtual plane VT1, the first prism cross-section T1 may be an isosceles triangle, so that the vertex n1 of the first prism cross-section T1 corresponds to the center O1 of the base b1 when vertically projected onto the base b1 of the first prism cross-section T1. Continuing from the above, according to some embodiments, the first prism cross-section T1 may have a vertex angle K1, and the vertex angle K1 may be an acute angle, a right angle, or an obtuse angle. For example, depending on the process tolerance limit, the vertex angle K1 may have an angle falling between 30 degrees and 150 degrees. Alternatively, the vertex angle K1 may have an angle falling between 60 degrees and 120 degrees. For example, as Figure 2 As shown, the top angle K1 may be 90 degrees, but this is only an example and is not limited thereto according to other embodiments.

[0063] In contrast, refer to Figure 3 As shown in the partial cross-section of the virtual plane VT2, the second prism cross-section T2 may be an asymmetric acute triangle. The vertex angle K2 of the second prism cross-section T2 may be at least less than 90 degrees. For example, the vertex angle K2 of the second prism cross-section T2 may be less than 60 degrees. Further, according to some embodiments of the present invention, in order to achieve the expected brightness gain, the vertex angle K2 of the second prism cross-section T2 may be less than 45 degrees. As mentioned above, the second prism cross-section T2 is not formed symmetrically, and therefore the vertex n2 of the second prism cross-section T2 may be offset relative to the center O2 of the base b2 of the second prism cross-section T2 when vertically projected onto the base b2 of the second prism cross-section T2. ​​For example, the vertex n2 of the second prism cross-section T2 may be offset relative to the center O2 of the base b2 along the first direction D1 when vertically projected onto the base b2 of the second prism cross-section T2. ​​Therefore, the triangular prism strips of the second prism column 220 may be relatively tilted along the first direction D1.

[0064] According to some embodiments, Figure 3 As shown, when a light L1 emitted through the first prism layer 100 further passes through the second prism layer 200, a light L2 offset along the first direction D1 can be generated based on this structure. Figures 1 to 3 When the light emitted from the backlight module BL passes through the first prism layer 100 and the second prism layer 200 in sequence, at least a portion of the light may be biased in the first direction D1.

[0065] As mentioned above, further reference is made to Figure 4, which shows a schematic diagram of the brightness of the biased emission light field Q actually generated by the first prism layer 100 and the second prism layer 200. Specifically, when the first prism column 110 of the first prism layer 100 and the second prism column 220 of the second prism layer 200 are arranged orthogonally to each other based on the extension direction, the angle of the vertex angle K2 of the second prism cross section T2 of the second prism column 220 of the second prism layer 200 can be changed, so that the second prism column 220 is offset along the first direction D1. For example, Figure 4 The figure shows that when the vertex angle K2 is 90 degrees (unshifted), 35 degrees (positive shift along the first direction D1), 25 degrees (positive shift along the first direction D1), and 20 degrees (positive shift along the first direction D1), the brightness of the emitted light field Q of the light emitted by the same backlight module BL after sequentially passing through the first prism layer 100 and the second prism layer 200 changes. It can be seen that after the second prism column 220 generates a positive shift along the first direction D1, the emitted light field Q also generates a positive bias along the first direction D1, and can further diverge and have a relatively more scattered property. That is, according to this embodiment, the light spot can be further enlarged or improved. Continuing from the above, as Figure 4 As shown, according to this embodiment, after the vertex angle K2 is less than 45 degrees, for example, at 35 degrees, 25 degrees and 20 degrees, the emitted light field Q is further diverged, and the overall visual brightness can be even brighter by more than 300% compared to the baseline unbiased state (vertex angle K2 is 90 degrees). Figure 4 It can be seen that the light pattern of the emission light field Q emitted by the backlight module BL and sequentially passing through the first prism layer 100 and the second prism layer 200 has a greater divergence in the first direction D1 than in the second direction D2.

[0066] Further, according to some embodiments, together with Figure 4 Reference Figure 5 When the second prism column 220 is offset along the first direction D1, the light field Q emitted by the backlight module BL and sequentially passing through the first prism layer 100 and the second prism layer 200 can be correspondingly diffused relative to the viewing angle perpendicular to the normal line (corresponding to the improvement of the divergence property of the light field Q). Specifically, if Figure 4By comparing the emission light field Q0 with a vertex angle K2 of 90 degrees (unshifted) with the emission light field Q1 with a vertex angle K2 of 35 degrees (positively shifted along the first direction D1), it can be seen that compared to concentrated vertical light emission, since the light field Q1 becomes more divergent and is offset along the first direction D1, it can further produce a wider range of light emission viewing angles in addition to the vertical light emission viewing angle (0 degrees). That is, according to some embodiments, when the second prism 220 is offset along the first direction D1 and is configured so that the vertex angle K2 of the second prism 220 is reduced, a diffuse and divergent emission light field Q1 can be generated, so that the emission light field Q1 can have a wider light emission viewing angle range and a larger half-power full angle.

[0067] For example, according to this embodiment, Figure 5 As shown, when the second prism column 220 is offset along the first direction D1 and the vertex angle K2 of the second prism column 220 is reduced, the half-power full angle of the emitted light field Q1 emitted by the backlight module BL and sequentially passing through the first prism layer 100 and the second prism layer 200 can be greater than 30 degrees. Specifically, the viewing angle at half the power of the light output having the maximum power of the emitted light field Q1 can be, for example, greater than 30 degrees. Therefore, objects within a wider viewing angle range can more easily receive the light emitted by the device of this embodiment.

[0068] Specifically, refer to Figure 6 The backlight module BL of the display module 10 may emit a light L (e.g., using densely arranged light sources M such as Mini LEDs, but not limited thereto). This light L may sequentially pass through the first prism layer 100 to generate a light L1 that is focused in the second direction D2. After passing through the second prism layer 200, this light L1 may generate a light L2 that is deflected and further diverged in the first direction D1 as described above.

[0069] As mentioned above, the display panel DP of the display module 10 can be any display panel that can display images based on the backlight configuration and electrical control, and can correspondingly utilize the divergent bias light L2 to generate image light CL that displays the desired display content. Figure 6As shown, since the image light CL is displayed based on the bias light L2, it can be biased in the first direction D1 and have a wider light output viewing angle H relative to the normal N of the display panel DP. For example, according to some embodiments, the display panel DP itself may not have a bias light function, but based on the bias light L2, it can generate image light CL that is biased and divergent in the first direction D1, thereby presenting an asymmetrical display image or information with enhanced brightness at a desired angle or direction. As mentioned above, based on the divergent bias light L2, the image light CL can be more divergent, for example, offset in the positive direction of the first direction D1, relative to a generally symmetrical light output (such as, but not limited to, a Lambertian light output pattern), and can correspondingly present an image or information with enhanced brightness in the positive direction of the first direction D1. Therefore, according to this embodiment, the display module 10 can achieve display light with a bias and increased divergence in a desired direction, such as the first direction D1, and can further be used for various applications of light output biasing and wide-area display. Furthermore, according to other embodiments of the present invention, the display module 10 may also be matched with or integrated with various display modules or other bias light structures having further bias light functions to enhance the aforementioned effect, thereby facilitating various applications of light bias and wide-area display.

[0070] Next, refer to Figure 7 , the application scenario of the display module 10 will be further explained below based on a display system 1000 according to an embodiment of the present invention.

[0071] As described above, according to this embodiment, a display system 1000 is disclosed, comprising a transparent partition W having at least partial reflectivity, a display module 10 disposed on a first side E1 of the transparent partition W, and a predetermined observation area EB also located on the first side E1 of the transparent partition W. The predetermined observation area EB is located farther from the transparent partition W than the display module 10 and may, for example, be the observation area where a subject viewing information displayed by the display system 1000 is expected to be located. Furthermore, the display panel DP is disposed at an acute angle G with the transparent partition W and emits image light CL facing the transparent partition W. Therefore, at least a portion of the image light CL emitted by the display panel DP can be reflected by the transparent partition W and displayed toward the predetermined observation area EB.

[0072] According to this embodiment, the display module 10 may be the display module 10 specifically described above with reference to other figures, and the first direction D1 corresponds to the direction passing through the transparent partition W. For example, according to this embodiment, the first direction D1 may be the direction passing through the transparent partition W from the second side E2 of the transparent partition W toward the first side E1 of the transparent partition W. As described above, since the display module 10 can generate image light CL that is biased in the first direction D1, for example, biased in the positive direction of the first direction D1, the image light CL can be biased in the first direction D1 relative to the normal N of the display panel DP and emitted at a larger viewing angle. In detail, together with Figure 7 Referring to FIG. 1 , which schematically shows only a portion of the configuration of the first prism layer 100 and the second prism layer 200 Figure 8 The vertex n2 of the second prism cross section T2 can be offset along the first direction D1, away from the transparent partition W, toward the predetermined observation area EB. Continuing above, the vertex angle K2 of the second prism cross section T2 can be less than 90 degrees. For example, the vertex angle K2 of the second prism cross section T2 can be less than 45 degrees. This structure can increase the proportion of image light CL that is offset along the first direction D1 toward the predetermined observation area EB and incident on the transparent partition W, thereby increasing the brightness of the image reflected by the transparent partition W.

[0073] For details, refer to Figure 7 and Figure 8 As shown, image light CL emitted at a larger viewing angle can be reflected by the transparent partition W at a location closer to the predetermined observation area EB along the first direction D1 and reach the predetermined observation area EB. As described above, according to this embodiment, due to the offset generated in the first direction D1, the amount of image light CL' emitted at a location farther from the predetermined observation area EB along the first direction D1 can be reduced. This can reduce or prevent light emitted due to the acute angle G between the display panel DP and the transparent partition W, which may directly enter the transparent partition W perpendicularly or at a relatively small oblique angle. Furthermore, the amount of light emitted relative to light emitted from the transparent partition W at a relatively large oblique angle relative to light emitted from the surface of the transparent partition W and then reflected from the transparent partition W can be increased. As described above, image light CL' emitted along the first direction D1 farther from the predetermined observation area EB may enter the transparent partition W perpendicularly or at a relatively small oblique angle, and at least a portion may directly pass through the transparent partition W and fail to be reflected to the predetermined observation area EB, thereby undesirably increasing light loss and reducing light extraction efficiency. Therefore, by reducing the image light CL' and increasing the image light CL biased along the first direction D1 toward the preset observation area EB, the amount of light incident on the transparent partition W with a larger inclination angle and reflected can be correspondingly increased, thereby improving the display brightness produced by the display module 10 observed in the preset observation area EB.

[0074] According to this embodiment, as described above, at least a portion of the image light CL emitted by the display panel DP can be reflected by the transparent partition W and reach the predetermined observation area EB, and the ambient light ML located on the second side E2 of the transparent partition W can also at least partially pass through the transparent partition W and be incident on the predetermined observation area EB. Therefore, the predetermined observation area EB can obtain display information with enhanced brightness while ensuring the field of view of the other side of the transparent partition W (e.g., the second side E2).

[0075] According to some embodiments, the display system 1000 can be integrated into a vehicle 2000 to serve as a heads-up display (HUD) for the vehicle. For example, the transparent partition W can be the windshield of the vehicle 2000, such as a car, and the predetermined observation area EB can be the observation area corresponding to the position of the driver 50.

[0076] According to this embodiment, similar to the above-described embodiment, the light pattern of the emitted light field Q emitted by the backlight module BL and sequentially passing through the first prism layer 100 and the second prism layer 200 can have a greater degree of divergence in the first direction D1 than in the second direction D2. For example, in the first direction D1, the half-power full angle of the emitted light field Q emitted by the backlight module BL and sequentially passing through the first prism layer 100 and the second prism layer 200 can be greater than 30 degrees. Therefore, the display system 1000 according to this embodiment can substantially have a divergent light field distribution with higher brightness and a wider viewing angle, so that other areas besides the predetermined observation area EB can also obtain display information while ensuring the field of view of the other side of the transparent partition W (e.g., the second side E2).

[0077] Specifically, refer to Figure 9 As shown, the display system 3000 having the same or similar architecture as the display system 1000 can be used as a pillar to pillar Head-Up Display (PHUD). As mentioned above, the display system 3000 can have at least one display module 10. For example, Figure 9As shown, the display system 3000 may have display modules 10, 20, and 30 connected or separately arranged, and may be similar to or the same as the structure with corresponding first prism layers and second prism layers described above with reference to other figures. Among them, the display modules 10, 20, and 30 may be separately configured display modules, or may be different blocks of an integrated display module. Continuing from the above, the display system 3000 can directly present a virtual image 500 formed by the image light CL reflected by the display modules 10, 20, and 30 on the transparent partition W without the need for reflective display by other reflective mechanisms or reflective displays. In addition, since the optical path length and reflection loss are reduced by reducing the need for reflective mechanisms and reflective displays, and a structure is provided that can bias the light output in the first direction D1, according to various embodiments of the present invention, a display screen with the same brightness or even a higher brightness can be achieved by using a backlight module BL with a non-light-collecting property and lower luminous intensity, such as a mini LED light-emitting panel. Therefore, the display modules 10, 20, 30 and the display systems 1000 or 3000 according to the embodiments of the present invention can further improve light extraction efficiency, thereby reducing or avoiding possible defects such as excessive power requirements or device overheating while achieving the same brightness display.

[0078] like Figure 9 As shown, since the display modules 10, 20, and 30 all emit image light CL with amplified brightness and a diverging viewing angle, and since the chance of reflection from the large transparent partition W is increased, as well as the area over which the light can be emitted, the brightness of the display screen can be further enhanced. Continuing from the above, the image light CL reflected by the transparent partition W from the display modules 10, 20, and 30 at different locations can be viewed within the predetermined observation area EB. This allows a predetermined subject within the predetermined observation area EB, such as a driver, to further expand the brightness of the displayed information or image while maintaining a clear view of the surroundings on the second side E2 of the transparent partition W through the transparent partition W.

[0079] In addition, due to the diffused light field properties of the image light CL, the desired virtual image 500 can have a relatively high brightness and a wide viewing angle. Therefore, in addition to the preset observation area EB, other areas such as but not limited to the area PB1 corresponding to the passenger seat or the area PB2 corresponding to the driving position and the passenger seat can also view the virtual image 500 (e.g. Figure 9(illustrative representation of light emitted from the display module 30 being reflected to various areas). As described above, according to this embodiment, the display system 3000 is essentially a display with wide-area properties. For example, the display system 3000 can essentially be a through-type head-up display (PHUD) that displays on a windshield that extends across and between the A-pillars, thereby reflecting and presenting images with a wide viewing angle that can be viewed from different positions through the windshield that can see through the external environment. Therefore, according to this embodiment, the range of the observable area where the displayed information or image can be viewed can be further expanded while ensuring the environmental field of view of the second side E2 of the transparent partition W. Moreover, due to the enhanced brightness of the display modules 10, 20, and 30 according to each embodiment of the present invention and the further divergent light properties offset along the first direction D1, the uniformity of the image light CL observed from different observable areas (such as but not limited to the preset observation area EB, area PB1, and area PB2) can be improved.

[0080] According to some embodiments, the second prism layer 200 in the display modules 10, 20, and 30 may also have different degrees of bias along the first direction D1 and corresponding vertex angle K2 angles, for example but not limited to making the vertex angle K2 in the display modules 10, 20, and 30 disposed at different positions have a gradual change, thereby adjusting the display for a specific preset observation area EB.

[0081] As mentioned above, refer to Figures 7 to 9 According to various embodiments of the present invention, a configuration having a first prism layer 100 and a second prism layer 200 can be used to achieve display light that is biased and divergent in a first direction D1, and thus a head-up display (HUD) with improved brightness and display effect can be achieved. In particular, according to some preferred embodiments, a head-up display with wide-area or even panoramic characteristics can be further achieved, such as but not limited to a through-type head-up display (PHUD), thereby allowing specific objects to view a wider display screen or allowing objects in more locations to view the display screen. For example, according to some embodiments, a full-screen display screen can be displayed below the entire windshield of a car, and the driver, co-pilot, and rear passengers can all view the display screen with improved brightness and uniformity.

[0082] According to some embodiments, when the display system 3000 is integrated into a vehicle 2000, the display modules 10, 20, and 30 may be sequentially mounted on the upper portion of the instrument panel, but the present invention is not limited thereto. Furthermore, according to some embodiments, a pivoting mechanism with at least partial pivoting capability may be installed corresponding to each display module 10, 20, and 30, thereby better tilting each display module 10, 20, and 30 in the first direction D1 for display, so that light is reflected by the transparent partition W and incident on a predetermined observation area EB or other area. However, the above is merely an example, and according to some embodiments of the present invention, even if the instrument panel lacks sufficient space for a pivoting mechanism or the structural design of the vehicle 2000 is not conducive to mounting a pivoting mechanism or pivoting, the structure provided by the present invention can still be used to achieve image light CL that is offset in the first direction D1 and emitted divergently and reflected by the transparent partition W to present a virtual image.

[0083] In summary, the display module and display system according to each embodiment of the present invention can achieve divergent light emission biased toward a preset direction by including a first prism layer and a second prism layer in a specific arrangement configuration, and can widen the range of the light emission viewing angle. Therefore, based on the biased light emission, various components can be combined to achieve richer and more delicate application scenarios. For example, a transparent partition can be combined to achieve a head-up display with improved brightness and wide-area performance, and can reduce or avoid the loss of light emitted in the opposite direction to the preset direction, and increase the uniformity of the actual displayed light, thereby improving the light emission efficiency of the entire display module or display system. As mentioned above, the display module or display system can be applied to various fields to provide more intuitive and convenient display scenarios.

[0084] The foregoing description is merely a list of preferred embodiments of the present invention. It should be noted that various variations and modifications may be made to the present invention without departing from the spirit and principles of the present invention. Those skilled in the art will appreciate that the present invention is defined by the appended claims, and that any permutations, combinations, modifications, and diversions of the present invention, while remaining consistent with the intent of the present invention, do not depart from the scope of the present invention as defined by the appended claims.

Claims

1. A display module, applied to a display system, the display system comprising a transparent partition and a predetermined observation area. The display system functions as a through-type head-up display, the transparent partition being a windshield of a vehicle, and the predetermined observation area corresponding to the driver's position. The transparent partition is at least partially reflective. The display module is disposed on a first side of the transparent partition, and the predetermined observation area is located on the first side of the transparent partition and further away from the transparent partition than the display module. The display module is characterized in that: The display module includes: a backlight module; a first prism layer disposed on the backlight module and having a plurality of first prism columns extending along a first direction; a second prism layer disposed on the first prism layer and having a plurality of second prism columns extending along a second direction transverse to the first direction, wherein the first prism columns and the second prism columns protrude away from the backlight module; and A display panel is disposed on the second prism layer, wherein the display panel and the transparent partition form an acute angle, and Each of the first prism columns has a first prism cross-section on a virtual plane with the first direction being the normal direction, and each of the second prism columns has a second prism cross-section on a virtual plane with the second direction being the normal direction, and the first prism cross-section and the second prism cross-section are triangular, and wherein, when the vertex of the second prism cross section is vertically projected onto the base of the second prism cross section, it is offset relative to the center of the base along the first direction; In which, at least part of the image light emitted by the display panel is reflected by the transparent partition and reaches the preset observation area, and the ambient light located on a second side of the transparent partition at least partially passes through the transparent partition and is incident to reach the preset observation area. The first direction is the direction from the second side of the transparent partition toward the first side of the transparent partition through the transparent partition, and the second direction is consistent with the direction from the driver's position to the co-driver's position.

2. The display module according to claim 1, wherein in, At least a portion of the light emitted from the backlight module is biased in the first direction when passing through the second prism layer, and the display panel correspondingly generates an image light biased in the first direction.

3. The display module according to claim 1, wherein: in, The first prism cross section is an isosceles triangle, and the second prism cross section is an acute triangle.

4. The display module according to claim 1, wherein: in, The vertex angle of the second prism cross section is less than 45 degrees.

5. The display module according to claim 1, wherein: in, The half-power full angle of an emission light field of light emitted by the backlight module and sequentially passing through the first prism layer and the second prism layer is greater than 30 degrees.

6. The display module according to claim 1, wherein: in, The divergence degree of a light pattern of an emission light field of light emitted by the backlight module and sequentially passing through the first prism layer and the second prism layer in the first direction is greater than that in the second direction.

7. A display system, characterized in that: Include: The display module according to claim 1.

8. The display system according to claim 7, wherein: in, The vertex of the second prism cross section is offset along the first direction away from the transparent partition and toward the preset observation area.

9. The display system according to claim 7, wherein: in, The vertex angle of the second prism cross section is less than 45 degrees.

10. The display system according to claim 7, wherein: in, The half-power full angle of an emission light field of light emitted by the backlight module and sequentially passing through the first prism layer and the second prism layer is greater than 30 degrees.

11. The display system according to claim 7, wherein: in, The divergence degree of a light pattern of an emission light field of light emitted by the backlight module and sequentially passing through the first prism layer and the second prism layer in the first direction is greater than that in the second direction.

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