Display device

Abstract

This invention proposes a display device. The display device includes a display panel having display blocks configured to display a predetermined image, and a backlight module disposed below the display panel. The backlight module includes a first light-emitting block and a second light-emitting block adjacent to each other, and the first light-emitting block is configured to provide light to the display blocks. The first light-emitting block is provided with a plurality of first light sources and has a first boundary region adjacent to the second light-emitting block, and the second light-emitting block is provided with a plurality of second light sources and has a second boundary region adjacent to the first light-emitting block. At least one of the first boundary region and the second boundary region is provided with a boundary light source. The light emission angle of the light emitted from the first light source or the second light source and emitted from the backlight module is wider than the light emission angle of the light emitted from the boundary light source and emitted from the backlight module.

Description

Technical Field

[0001] This invention relates to a display device. More specifically, this invention relates to a display device having at least two adjacent light-emitting blocks. Background Technology

[0002] With the widespread development of modern display devices, the places where these devices are installed and their uses are also increasing. Furthermore, due to limited installation space and more diverse application needs, people expect display devices to integrate and realize multiple display and lighting functions. For example, dashboards, ambient lighting, auxiliary lighting, indicator lights, and decorative lights. Summary of the Invention

[0003] The purpose of this invention is to provide a display device to solve at least one of the above-mentioned problems.

[0004] According to an embodiment of the present invention, a display device is provided, comprising: a display panel having display blocks configured to display a predetermined image; and a backlight module disposed below the display panel, and including a first light-emitting block and a second light-emitting block adjacent to each other. The first light-emitting block is configured to provide light to the display blocks. The first light-emitting block is provided with a plurality of first light sources and has a first boundary region adjacent to the second light-emitting block, and the second light-emitting block is provided with a plurality of second light sources and has a second boundary region adjacent to the first light-emitting block. At least one of the first boundary region and the second boundary region is provided with at least one boundary light source. The light emission angle of the light emitted from the plurality of first light sources or the plurality of second light sources and emitted from the backlight module, relative to a normal perpendicular to the display panel, is wider than the light emission angle of the light emitted from the boundary light sources and emitted from the backlight module.

[0005] According to the various embodiments of the present invention, a plurality of light-emitting blocks, such as at least two light-emitting blocks, can be integrated and arranged on the same display panel. As described above, the integrated light-emitting blocks can reduce or avoid mutual interference, and the display device integrating multiple light-emitting blocks can achieve different display or light-emitting effects at different locations on the display panel. For example, while displaying a predetermined image, ambient lighting to create an atmosphere can also be displayed. Attached Figure Description

[0006] Figure 1 This is an exploded perspective view of a display device according to an embodiment of the present invention.

[0007] Figure 2 This is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0008] Figure 3 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0009] Figure 4 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0010] Figure 5A This is a schematic diagram of the configuration structure of a first boundary light source that achieves collimated emission according to an embodiment of the present invention.

[0011] Figure 5B This is a schematic diagram of the configuration structure of a first light source that achieves wide-viewing-angle emission according to an embodiment of the present invention.

[0012] Figure 5C This is a schematic diagram of the configuration structure of a first light source that achieves wide-viewing-angle emission according to another embodiment of the present invention.

[0013] Figure 6A This is a schematic diagram of the configuration structure of a second boundary light source that achieves collimated emission according to an embodiment of the present invention.

[0014] Figure 6B This is a schematic diagram of the configuration structure of a second light source that achieves wide-viewing-angle emission according to an embodiment of the present invention.

[0015] Figure 6C This is a schematic diagram of the configuration structure of a second light source that achieves wide-viewing-angle emission according to another embodiment of the present invention.

[0016] Figure 7 This is a schematic diagram illustrating the results of varying the collimation and wide-viewing-angle luminescence properties by adjusting the refractive index and thickness according to various embodiments of the present invention.

[0017] Figure 8 To illustrate an embodiment of the present invention Figure 7 A schematic diagram of the resulting light output angle.

[0018] Figure 9 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0019] Figure 10 This is a schematic diagram showing that the first BEF membrane and the second BEF membrane are orthogonal to each other according to an embodiment of the present invention.

[0020] Figure 11 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0021] Figure 12 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0022] Figure 13 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0023] Figure 14A This is a diagram showing the distribution angle of light rays emitted only through the first BEF film according to an embodiment of the present invention.

[0024] Figure 14B This is a diagram showing the distribution angles of light rays emitted through a first orthogonal BEF film and a second BEF film according to an embodiment of the present invention.

[0025] Figure 14C For comparison according to an embodiment of the present invention Figure 14A and Figure 14B The curves showing the output brightness and corresponding angles.

[0026] Figure 15 This is a schematic diagram of a display device according to another embodiment of the present invention, and of the device performing display and light emission.

[0027] The attached figures are labeled as follows:

[0028] 10, 20: Display devices

[0029] 15: Control Module

[0030] 50: Base plate

[0031] 100: First light-emitting block

[0032] 105: First Boundary Zone

[0033] 150: Border Area

[0034] 200: Second light-emitting block

[0035] 205: Second Boundary Zone

[0036] 300: Diffusion sheet

[0037] 410: First BEF membrane

[0038] 415: First Prism Structure

[0039] 420: Second BEF membrane

[0040] 425: Second Prism Structure

[0041] 500: Optical coating

[0042] 610: First polarizing layer

[0043] 620: Second polarizing layer

[0044] 700: Liquid Crystal Layer

[0045] 705: Frame adhesive

[0046] 800: Matrix layer

[0047] 900: Color Filter

[0048] 950: Optical adhesive

[0049] 1000: Top Cover

[0050] Ar: Light-emitting block

[0051] B: Boundary light source

[0052] BU: Backlight Module

[0053] C: Convex lens block

[0054] C1: First convex lens block

[0055] C1', C2': Convex lens block

[0056] C2: Second convex lens block

[0057] D1, D2, D3: Direction

[0058] d1, d2: Direction of extension

[0059] DP: Display Panel

[0060] E: Lens structure

[0061] E1: First diverging lens

[0062] E1', E2': Collimating lenses

[0063] E2: Second diverging lens

[0064] G: Dividing line

[0065] H1, H2, H3, H4, H5, H6, H7: Method

[0066] I: Display command

[0067] K1: First luminous surface

[0068] K, K1', K2': Light-emitting surfaces

[0069] K2: Second luminous surface

[0070] L1, L2, L1', L2', L3: Light rays

[0071] L4: Pattern Light

[0072] M: Pre-reserved image

[0073] MA: Pattern Layer

[0074] NL: Normal

[0075] N, N1, N1', N2, N2': Refractive index

[0076] O, O1, O1', O2, O2': Light rays

[0077] P: Flat lens block

[0078] P1: First flat lens block

[0079] P1', P2': Flat lens blocks

[0080] P2: Second flat lens block

[0081] Ph: Azimuth

[0082] Pr: Periphery

[0083] Q: Light source

[0084] Q1: First light source

[0085] Q1', Q2': Geographic light source

[0086] Q2: Second light source

[0087] R1: Display Block

[0088] R2: Non-display block

[0089] S: Light source

[0090] S1, S11, S12: First light source

[0091] S2, S21, S22: Second light source

[0092] S1': First boundary light source

[0093] S2': Second boundary light source

[0094] T: Outer frame

[0095] Th, Th1, Th1', Th2, Th2': Thickness

[0096] W: Predetermined irradiation range

[0097] θ, θ1, θ2, θ1', θ2': light emission angle Detailed Implementation

[0098] Various embodiments will be described below, and those skilled in the art should readily understand the spirit and principles of the invention by referring to the description and accompanying drawings. However, while specific embodiments will be described in detail herein, these embodiments are merely illustrative and are not intended to be limiting or exhaustive in any respect. Therefore, various changes and modifications to the invention will be readily apparent and easily achievable by those skilled in the art without departing from the spirit and principles of the invention.

[0099] Reference Figure 1 According to an embodiment of the present invention, a display device 10 comprising a backlight module BU and a display panel DP is disclosed. Continuing from the above, as Figure 1 As shown, the backlight module BU and the display panel DP can be arranged on the planes defined by the first direction D1 and the second direction D2, respectively, and the backlight module BU and the display panel DP can be stacked along the third direction D3. In addition, other components can be arranged between the backlight module BU and the display panel DP according to requirements and design, such as, but not limited to, one or more optical film layers 500.

[0100] As described above, the display panel DP may have at least one display block R1, and the backlight module BU correspondingly disposed under the display panel DP may include at least a first light-emitting block 100 and a second light-emitting block 200 adjacent to each other. The first light-emitting block 100 may correspond to the aforementioned display block R1 and is configured to provide light to the display block R1, while the second light-emitting block 200 may correspond to blocks other than the aforementioned display block R1 and is configured to provide light to these blocks. For example, according to this embodiment, the display panel DP may have a display block R1 configured to display a predetermined image M, and a non-display block R2 disposed around the display block R1 and configured to emit ambient light illumination, wherein the first light-emitting block 100 may correspondingly provide light to the display block R1 and the second light-emitting block 200 may correspondingly provide light to the non-display block R2. However, the above is merely an example, and the configuration and use of the allocation blocks of the display panel DP according to other embodiments of the present invention are not limited to this specific example, provided that the first light-emitting block 100 and the second light-emitting block 200 corresponding to the backlight module BU are set.

[0101] Specifically, according to this embodiment, the first light-emitting block 100 may be provided with multiple first light sources S1 ( Figure 1 (Only one is shown as an example), and it has a first boundary region 105 adjacent to the second light-emitting block 200. Additionally, the second light-emitting block 200 may be provided with multiple second light sources S2 ( Figure 1(Only one is shown as an example), and it has a second boundary region 205 adjacent to the first light-emitting block 100. The first boundary region 105 and the second boundary region 205 can be collectively referred to as boundary region 150. As mentioned above, boundary region 150 may be provided with at least one boundary light source B. That is, at least one of the first boundary region 105 and the second boundary region 205 may be provided with at least one boundary light source B, for example... Figure 1 The first boundary light source S1', the second boundary light source S2', or a combination thereof are shown as examples.

[0102] In detail, for example, when a first boundary light source S1' is provided as boundary light source B, the light emission angle θ1 of the light rays L1 emitted from the plurality of first light sources S1 and emitted from the backlight module BU relative to the normal NL perpendicular to the display panel DP can be wider than the light emission angle θ1' of the light rays L1' emitted from the first boundary light source S1' and emitted from the backlight module BU. Similarly, for example, when a second boundary light source S2' is provided as boundary light source B, the light emission angle θ2 of the light rays L2 emitted from the plurality of second light sources S2 and emitted from the backlight module BU relative to the normal NL perpendicular to the display panel DP can be wider than the light emission angle θ2' of the light rays L2' emitted from the second boundary light source S2' and emitted from the backlight module BU. In other words, according to this embodiment, at least one boundary light source B can be provided, such that the light emission angle of at least one light source in the boundary region 150 can be collimated or at least emitted at a small angle relative to its corresponding first light emission block 100 or second light emission block 200. This reduces or avoids the defect of light leakage or interference caused by light escaping from different light emission blocks to adjacent light emission blocks when different light emission blocks are set adjacently.

[0103] As mentioned above, the light emission angle discussed here can be relative to the normal NL, that is, based on... Figure 1 The light distribution angle shown is within 10% or more of the peak light intensity of the emitted light, based on a reference where the vertical third direction D3 is zero degrees. However, this is merely an example, and the invention is not limited thereto. For example, it could also be a light distribution angle within 20% or more of the peak light intensity of the emitted light, or a light distribution angle within 30% or more of the peak light intensity of the emitted light, etc. Accordingly, those skilled in the art should be able to determine the differences in the light emission angles of the light emitted from the backlight module BU corresponding to different light sources by direct observation or indirect testing and comparison using conventional judgment methods, and distinguish between those that emit collimated light or at least light at a smaller angle, and those that emit light at a wide viewing angle or at least light at a larger angle.

[0104] In the following text, reference will be made along... Figure 1The accompanying drawings of the display device 10, taken by the X-X' cross-section, are used to further illustrate the specific methods by which the collimated light emission or at least the light emission at a smaller angle of the boundary region 150 is achieved according to different embodiments of the present invention.

[0105] Continuing from above, refer to Figure 2 According to embodiment H1, the backlight module BU along third direction D3 may include a base plate 50 and a plurality of light sources arranged on the base plate 50. As described above, a plurality of first light sources S1 for emitting light O1 may be provided in the first light-emitting block 100, and a plurality of second light sources S2 for emitting light O2 may be provided in the second light-emitting block 200. Continuing on, according to some embodiments, the first light sources S1 and the second light sources S2 may be, for example, but not limited to, light sources such as LED, micro LED, miniLED, etc. Further, the first light source S1 may be, for example, a white light source, and the emitted white light may display the expected color and image according to the control of the display panel DP when passing through the display panel DP, thereby displaying a predetermined image M. In addition, the second light sources S2 may each be, for example, a colored light source selected from the group consisting of white light sources, red light sources, green light sources, blue light sources, etc., and may emit predetermined light according to the design, so that the non-display block R2 functions as a lighting lamp, decorative lamp, ambient light, indicator light, warning light, etc. For example, according to some embodiments, such as Figure 2 As shown, the second light source S2 can actually be a unit composed of sub-pixels of red, green, and blue light sources, and the selection or combination of light sources can be adjusted according to requirements and design. However, the above are merely examples, and according to different embodiments of the present invention, the colors of the first light source S1 and the second light source S2, as well as the uses of the first light-emitting block 100 and the second light-emitting block 200, are not limited thereto.

[0106] For example, according to other embodiments, the first light-emitting block 100 may also contain only a blue light source, and the emitted blue light can display the expected color and image according to the control of the display panel DP when passing through it. Alternatively, the second light-emitting block 100 may also contain light sources other than white light sources, red light sources, green light sources, blue light sources, etc., and serve any other purpose requiring light emission. As described above, when the backlight module BU is provided with adjacent first light-emitting blocks R1 and second light-emitting blocks R2, the different embodiments of the present invention are not limited to the specific manner described herein.

[0107] According to some embodiments, the arrangement density (i.e., pixel density or resolution, PPI) of the plurality of first light sources S1 can be higher than that of the plurality of second light sources S2. Alternatively, the pixel size of the plurality of first light sources S1 can be smaller than the pixel size of the plurality of second light sources S2. Thus, the display area R1 can achieve more refined and subtle display variations relative to the non-display area R2. However, this is merely an example, and the invention is not limited thereto; the resolution or pixel size of the display area R1 and the non-display area R2 can be adjusted according to the actual application objectives.

[0108] Based on the above, Figure 2 In the illustrated configuration H1, the boundary light source B may include a plurality of first boundary light sources S1' disposed in the first boundary region 105. Specifically, a first boundary light source S1' that can exhibit collimated light emission or light emission at a smaller angle relative to the first light source S1 may be directly disposed. Therefore, the emission angle θ1 of the light rays O1 emitted from the plurality of first light sources S1 is initially wider than the emission angle θ1' of the light rays O1' emitted from the first boundary light source S1'. Thus, when light is emitted from the backlight module BU and further emitted through the display panel DP, the emission angle θ1 of the light ray L1 emitted from the backlight module BU corresponding to the first light source S1 can be wider than the emission angle θ1' of the light ray L1' emitted from the backlight module BU corresponding to the first boundary light source S1'.

[0109] Continuing from the above, by setting a first boundary light source S1' with collimated light emission or light emission at a smaller angle at the boundary of the second light-emitting block 200, the light emitted from the first light-emitting block 100 can be reduced or prevented from leaking into the non-display block R2, or interfering with the light L2 emitted from the second light source S2 and emitted from the backlight module BU by the second light-emitting block 200. In other words, while maintaining the advantage of wide-viewing angle light emission from the first light-emitting block 100, which is mostly wide-viewing angle light emission, the influence of the light emitted from the first light-emitting block 100 on the predetermined illumination range W of the second light-emitting block 200 can be reduced or prevented.

[0110] according to Figure 2 In the embodiment shown, the light ray O2 emitted by the second light source S2 and its corresponding light ray L2 emitted from the backlight module BU can be collimated light or wide-viewing-angle light as required or designed, and will not be described in detail here.

[0111] In addition, according to some embodiments, the display panel DP disposed on the backlight module BU can be a liquid crystal display panel. Specifically, the display panel DP, facing away from the backlight module BU, may sequentially stack a first polarizing layer 610, a matrix layer 800 on which thin-film transistors or circuits are disposed, a liquid crystal layer 700 on which liquid crystal molecules are arranged, and a frame adhesive 705 for assisting in positioning the liquid crystal layer 700, a color filter 900 on which black matrices are selectively spaced, a second polarizing layer 620, an optical adhesive 950, and a top cover 1000 having the desired light transmittance. Furthermore, this structural configuration is only an example, and other embodiments of the present invention may have display panels DP with other configurations without contradicting the respective uses of the first light-emitting block R1 and the second light-emitting block R2. For example, according to other embodiments of the present invention, the display panel DP may also be an organic light-emitting display panel, a quantum dot display panel, etc.

[0112] Continuing from the above, according to this embodiment, the first light-emitting block 100 and its corresponding display block R1 can be configured for display, and the second light-emitting block 200 and its corresponding non-display block R2 can be configured for ambient lighting. Therefore, the display block R1 may include a first polarizing layer 610, a liquid crystal layer 700, and a second polarizing layer 620 stacked sequentially facing the backlight module BU, so that light L1 or L1' can be emitted after passing through the first polarizing layer 610, the liquid crystal layer 700, and the second polarizing layer 620 for the expected display. That is, the first polarizing layer 610, the liquid crystal layer 700, and the second polarizing layer 620 can be stacked and disposed in the display panel DP corresponding to the first light-emitting block 100.

[0113] Furthermore, as described above, according to this embodiment, the portion of the display panel DP corresponding to the predetermined illumination range W of the second light-emitting block 200 is a non-display block R2. Therefore, in order to provide the intended ambient lighting, this non-display block R2 still needs to be configured to be translucent, so that the light L2 emitted from the second light-emitting block 200 can at least partially pass through the non-display block R2. For example, at least one of the first polarizing layer 610 and the second polarizing layer 620 may not extend into the predetermined illumination range W of the second light-emitting block 200, in order to reduce or avoid the light L2 of the second light-emitting block 200 being blocked by the combination of the first polarizing layer 610 and the second polarizing layer 620, thus preventing it from emitting light for the intended ambient lighting.

[0114] According to some embodiments, the light transmittance of the non-display area R2 may be the same as or approximately the light transmittance of the display area R1. However, this is merely an example, and other embodiments of the present invention are not limited thereto. For example, the light transmittance of the non-display area R2 may also be greater than the light transmittance of the display area R1.

[0115] As stated above, those skilled in the art should be able to configure the required type of display panel DP and its corresponding architecture and properties according to the intended use and function of the first light-emitting block 100 and its corresponding display block R1, as well as the second light-emitting block 200 and its corresponding block (such as the non-display block R2), and will not elaborate further here.

[0116] Next, refer to Figure 3 According to another embodiment of the present invention, in mode H2, the display panel DP and the backlight module BU may have a state similar to that of mode H1 described above, and the same or similar contents will not be repeated. Continuing above, the difference between mode H2 and mode H1 is that the boundary light source B may be disposed in the second light-emitting block 200 instead of in the first light-emitting block 100. For example, the boundary light source B may include a plurality of second boundary light sources S2' disposed in the second boundary area 205. Specifically, a second boundary light source S2' that can exhibit collimated light emission or a smaller angle of light emission relative to the second light source S2 can be directly disposed. Therefore, the light emission angle θ2 of the light rays O2 emitted from the plurality of second light sources S2 is initially wider than the light emission angle θ2' of the light rays O2' emitted from the second boundary light source S2'. Therefore, when light is emitted from the backlight module BU and further emitted through the display panel DP, the light emission angle θ2 of the light L2 emitted from the backlight module BU corresponding to the second light source S2 can be wider than the light emission angle θ2' of the light L2' emitted from the backlight module BU corresponding to the second boundary light source S2'.

[0117] Continuing from the above, by setting a second boundary light source S2' at the boundary of the first light-emitting block 100, which provides collimated light emission or light emission at a smaller angle, the light emitted from the second light-emitting block 200 can be reduced or prevented from leaking out to the display block R1, or interfering with the light L1 emitted from the first light-emitting block 100 from the first light source S1 and emitted from the backlight module BU. In other words, while maintaining the advantage of wide-viewing angle light emission from the second light-emitting block 200, which is mostly wide-viewing angle light emission, the light emitted from the second light-emitting block 200 exceeding the predetermined illumination range W and interfering with other display blocks R can be reduced or prevented.

[0118] According to this embodiment, the light ray O1 emitted by the first light source S1 and its corresponding light ray L1 emitted from the backlight module BU can be collimated light or wide-viewing-angle light as required or designed, and will not be described in detail here.

[0119] Next, refer to Figure 4According to another embodiment of the present invention, in mode H3, the display panel DP and the backlight module BU may have a state similar to that of mode H1 or mode H2 described above, and the same or similar content will not be repeated here. Continuing above, the difference between mode H3 and mode H1 or mode H2 is that the backlight module BU may simultaneously have multiple first boundary light sources S1' disposed in the first boundary region 105 and multiple second boundary light sources S2' disposed in the second boundary region 205. Specifically, first boundary light sources S1' that can exhibit collimated light emission or light emission at a smaller angle relative to the first light source S1, and second boundary light sources S2' that can exhibit collimated light emission or light emission at a smaller angle relative to the second light source S2 can be directly disposed. Thus, while maintaining the advantage of wide-viewing angle light emission for most of the first light-emitting block 100 and the second light-emitting block 200, mutual interference or influence between light emission from different adjacent light-emitting blocks can be reduced or avoided. Continuing above, this configuration should be understood in combination with the descriptions of mode H1 or mode H2 described above, and will not be repeated here.

[0120] Furthermore, although, as described in embodiments H1 to H3 above, at least one boundary light source B can be provided in the boundary region 150 for collimated emission or at least light emission at a small angle, the types of light sources that can be provided in the boundary region 150 according to the embodiments of the present invention are not limited to this. For example, multiple boundary light sources B can be provided in the boundary region 150, and multiple first light sources S1 or second light sources S2 can also be provided. Alternatively, multiple boundary light sources B can be provided in the boundary region 150, without providing additional first light sources S1 or second light sources S2. Continuing on, according to the embodiments of the present invention, in addition to providing at least one boundary light source B in the boundary region 150, other types of light sources can be selectively provided or not provided in the boundary region 150.

[0121] The following will further describe the specific architectural configurations of the boundary light source for collimated emission and other light sources for wide-viewing-angle emission according to some embodiments of the present invention.

[0122] Continuing from above, refer to Figure 5A According to one embodiment, the boundary light source B may be the first boundary light source S1' described above, and the first boundary light source S1' may include a boundary light source Q1' and a collimating lens E1' stacked on the light-emitting surface K1' of the boundary light source Q1'.

[0123] In detail, the collimating lens E1' may include a flat lens block P1' stacked on the light-emitting surface K1' and a convex lens block C1' having a plane disposed on the flat lens block P1' and protruding toward the display panel DP. Based on this architecture, by adjusting the thickness Th1' of the flat lens block P1' to be thicker and the refractive index N1' to be lower, the light emitted from the boundary light source Q1' can have a more collimated ray O1' or at least a ray O1' with a smaller emission angle after passing through the collimating lens E1'.

[0124] Continuing from the above, without the flat lens block P1', it is difficult to significantly change the light emission angle regardless of adjusting the refractive index or thickness of the aforementioned convex lens block C1'. However, when a flat lens block P1' is further provided in addition to the convex lens block C1' protruding away from the boundary light source Q1', the light emission angle of the light ray O1' can be easily and significantly changed by adjusting the thickness Th1' and refractive index N1' of the flat lens block P1'.

[0125] In contrast, according to some embodiments, the first light source S1 described above may be, for example, as follows: Figure 5B The first light source S11 shown may not have a flat lens block. Specifically, the first light source S11 may include a first light source Q1 and a first diverging lens E1 stacked on the first light-emitting surface K1 of the first light source Q1. Furthermore, the first diverging lens E1 may only include a first convex lens block C1 stacked on the first light-emitting surface K1 and protruding towards the display panel DP, and its function is to ensure that the light emitted from the first light source Q1, after passing through the first diverging lens E1, has a relatively divergent ray O1 or at least a ray O1 with a large emission angle.

[0126] Continuing from the above, according to some embodiments, by not providing a flat lens block, even if the first light source Q1 and the boundary light source Q1' have the same light-emitting characteristics (e.g., both are the same type of white LED for display), according to... Figure 5B The configured first light source S11 can still have a relatively divergent ray O1 or at least a ray O1 with a large emission angle corresponding to the first boundary light source S1'.

[0127] Furthermore, according to some embodiments, the first light source S1 described above may be, for example, as follows: Figure 5C The first light source S12 is shown. As described above, relative to the first light source S11, the first diverging lens E1 may further include a first flat lens block P1 inserted between the first convex lens block C1 and the first light source Q1. According to this embodiment, by adjusting the thickness Th1 of the first flat lens block P1 to be thinner and / or the refractive index N1 to be higher, the light emitted from the first light source Q1 can have a more divergent ray O1 or at least a ray O1 with a larger emission angle after passing through the first diverging lens E1.

[0128] Similarly, refer to Figure 6A According to one embodiment, the boundary light source B can be the second boundary light source S2' described above, and the second boundary light source S2' can include a boundary light source Q2' and a collimating lens E2' stacked on the light-emitting surface K2' of the boundary light source Q2'. Furthermore, the collimating lens E2' can include a flat lens block P2' stacked on the light-emitting surface K2' and a convex lens block C2' disposed on the flat lens block P2' and protruding towards the display panel DP. Based on this architecture, by adjusting the thickness Th2' of the flat lens block P2' to be thicker and the refractive index N2' to be lower, the light emitted from the boundary light source Q2' can have a more collimated ray O2' or at least a ray O2' with a smaller emission angle after passing through the collimating lens E2'. In other words, when a flat lens block P2' is further provided in addition to the convex lens block C2', the emission angle of the ray O2' can be significantly changed by easily adjusting the thickness Th2' and the refractive index N2' of the flat lens block P2'.

[0129] In contrast, according to some embodiments, the second light source S2 described above may be, for example, as follows: Figure 6B The second light source S21 shown may not have a flat lens block. Specifically, the second light source S21 may each include a second light source Q2 and a second diverging lens E2 stacked on the second light-emitting surface K2 of the second light source Q2. Furthermore, the second diverging lens E2 may only include a second convex lens block C2 stacked on the second light-emitting surface K2 and protruding towards the display panel DP, and its function is to ensure that the light emitted from the second light source Q2, after passing through the second diverging lens E2, has a more divergent ray O2 or at least a ray O2 with a larger emission angle. As described above, since a flat lens block is not provided, even if the second light source Q2 and the boundary light source Q2' have the same light-emitting characteristics (e.g., both are the same type of blue LED used for ambient lighting), according to... Figure 6B The configured second light source S21 can still have a relatively divergent light ray O2 or at least a light ray O2 with a large emission angle corresponding to the second boundary light source S2'.

[0130] Similarly, according to some embodiments, the second light source S2 described above can also be, for example, as shown below. Figure 6C The second light source S22 is shown. As described above, relative to the second light source S21, the second diverging lens E2 may further include a second flat lens block P2 inserted between the second convex lens block C2 and the second light source Q2. According to this embodiment, by adjusting the thickness Th2 of the second flat lens block P2 to be thinner and / or the refractive index N2 to be higher, the light emitted from the second light source Q2 can have a more divergent ray O2 or at least a ray O2 with a larger emission angle after passing through the second diverging lens E2.

[0131] According to some embodiments, when such Figure 5B and Figure 6B When the first or second light source is arranged as shown, the materials and processes for fabricating the flat lens block can be relatively reduced or eliminated, thereby reducing the corresponding cost and time. Figure 5C and Figure 6C When the first or second light source is arranged as shown, it can be corresponding to Figure 5A and Figure 6A The first boundary light source and the second boundary light source shown are manufactured together using the same process, thereby reducing or avoiding the complexity and cumbersomeness caused by different processes, or the step difference between different parts.

[0132] Reference Figure 7 , which shows a basis similar to Figure 5A , Figure 5C , Figure 6A and Figure 6C The architecture was simulated to depict the light profile. Among them, Figure 7 The light source Q of the light source S is set to ideally diffuse light (Lambertian: 180°), and the radius of curvature of the convex lens block C of the lens structure E is set to 1 mm, while the refractive index of the convex lens block C of the lens structure E is set to 1.5. Continuing from the above... Figure 7 This illustrates the effect of changing the thickness Th and refractive index N of the flat lens block P on the emitting surface K on the corresponding light emission angle. (Including...) Figure 7 Reference Figure 8 The aforementioned light source architecture reflects that the light emission angle θ (corresponding to the light emission block Ar) of the ray O corresponding to the normal NL increases as the thickness Th of the flat lens block P decreases, and also increases as the refractive index N of the flat lens block P increases. For example, if the radius of curvature of the convex lens block C based on the lens architecture E is set to 1 mm, and the refractive index of the convex lens block C in the lens architecture E is 1.5, and the refractive index N of the flat lens block P is also 1.5, the thickness Th of the flat lens block P, when greater than 0.5 mm, may exhibit collimated light emission or light emission at a relatively small angle.

[0133] Following on, such as Figure 7 As shown, based on the dividing line G, it can be seen that the light emitted from the left half of the attached diagram tends towards collimated light emission, while the light emitted from the right half tends towards wide-angle light emission. Therefore, for example, when collimated light emission is required, the refractive index N of the flat lens block P can be set to 1.5 and the thickness Th to 0.75 mm, while when wide-angle light emission is required, the refractive index N of the flat lens block P can be set to 1.7 and the thickness Th to 0.5 mm. However, this is only an example, and the applicable data range is not limited to this, given the relative differences between collimated and wide-angle light emission.

[0134] As mentioned above Figures 5A to 8As shown, according to some embodiments, in order to achieve relative collimated light output and wide-angle light output relative to the first boundary light source S1' and the first light source S1, the thickness Th1' of the flat lens block P1' can be greater than the thickness Th1 of the first flat lens block P1, or the refractive index N1' of the flat lens block P1' can be less than the refractive index N1 of the first flat lens block P1, or both. Alternatively, in order to achieve relative collimated light output and wide-angle light output relative to the second boundary light source S2' and the second light source S2, the thickness Th2' of the flat lens block P2' can be greater than the thickness Th2 of the second flat lens block P2, or the refractive index N2' of the flat lens block P2' can be less than the refractive index N2 of the second flat lens block P2, or both. Therefore, those skilled in the art should understand from the above description how to adjust the thickness and refractive index accordingly to achieve the desired relative collimated light output and wide-angle light output, and specific data examples will not be described here.

[0135] Furthermore, according to some embodiments, if the required refractive index is the same, the various flat lens blocks and convex lens blocks described above can be separately made of the same material, or they can be integrally formed of the same material. However, the above are merely examples, and those skilled in the art should understand that flat lens blocks and convex lens blocks can be manufactured by selecting corresponding materials and processes according to their required thickness and refractive index, and then assembled or stacked.

[0136] Furthermore, the changes in peak light intensity caused by adjusting the light pattern in the various embodiments of the present invention can be compensated for by further adjusting the corresponding control voltage to enhance or weaken the peak light intensity. Therefore, it can be ensured that all light patterns, such as collimated light output or wide-viewing-angle light output, have the desired or expected peak light intensity.

[0137] Next, we will refer to further Figures 9 to 14C This invention describes other methods for achieving relatively collimated light output and wide-angle light output according to different embodiments of the present invention.

[0138] Following on, Figure 9This illustrates a method H4 according to another embodiment of the present invention. Method H4 may have the same or similar structure as method H1, and a first boundary light source S1' emitting light ray O1' may be provided as boundary light source B in the first boundary region 105. However, unlike method H1, the first boundary light source S1' in method H4 may emit wide-viewing-angle light substantially similar to the first light source S1 disposed in other parts of the first light-emitting block 100, and may even be substantially identical to the first light source S1. Continuing from the above, according to this embodiment, the boundary light source B does not directly exhibit collimated light emission, but rather exhibits collimated light emission only after passing through other components of the backlight module BU. Specifically, corresponding to the vertical projection of the first boundary light source S1', the backlight module BU may further include a diffuser sheet 300, a first BEF film 410, and a second BEF film 420 stacked sequentially facing away from the first boundary light source S1'. Together with Figure 9 Reference Figure 10 The extension direction d1 of the plurality of first prism structures 415 in the first BEF film 410 can be orthogonal to the extension direction d2 of the plurality of second prism structures 425 in the second BEF film 420. Therefore, the wide-viewing-angle light ray O1' emitted by the first boundary light source S1' can be converted into collimated light ray L1' after passing through the first BEF film 410 and the second BEF film 420, or at least light ray L1' with a smaller exit angle, such that its exit angle θ1' is smaller than the exit angle θ1 of the light ray L1 emitted by the light ray O1 emitted by the first light source S1 after passing through the backlight module BU.

[0139] As described above, according to some embodiments, in order to achieve collimated light emission or light emission at a smaller angle in the boundary region 150, a first BEF film 410 and a second BEF film 420 may be provided corresponding to the boundary light source B. Therefore, the light emitted from the boundary light source B, after passing through the first BEF film 410 and the second BEF film 420, can be converted into collimated light or light with at least a smaller angle of emission. Consequently, according to this configuration, the extension range of a single BEF film is not limited. For example, referring to… Figure 11 In the other embodiment shown, H5, compared to H4, a BEF film, such as a first BEF film 410, can further extend into the second light-emitting block 200, but it is still only stacked with the second BEF film 420 at the first boundary region 105 corresponding to the first boundary light source S1', thereby achieving collimated light emission or light emission at a smaller angle corresponding to the first boundary light source S1'. Thus, while maintaining the advantage of wide-viewing-angle light emission from the first light-emitting block 100, the impact of the light emission from the first light-emitting block 100 on the predetermined illumination range W of the second light-emitting block 200 can be reduced or avoided.

[0140] In addition, such as Figure 12As shown, a similar configuration of double-stacked first BEF film 410 and second BEF film can also be implemented in the second junction region 205. That is, referring to Figure 12 The difference between method H6 and method H5 described above lies in that the first BEF film 410 and the second BEF film are set corresponding to the second boundary region 205 instead of the first boundary region 105. Therefore, the light ray O2' emitted by the second boundary light source S2', which has a relatively wide viewing angle, can be converted into collimated light ray L2', or at least light ray L2' with a smaller emission angle, when emitted from the backlight module BU. This makes its emission angle θ2' smaller than the emission angle θ2 of the light ray L2 emitted by the second light source S2 after passing through the backlight module BU. Thus, while maintaining the advantage of wide-viewing angle light emission in the second light-emitting block 200, which is mostly wide-viewing angle light emission, interference with the display block R caused by the light emitting block 200 exceeding the predetermined illumination range W can be reduced or avoided.

[0141] Furthermore, similar to the above method H3, the configuration of double-stacked first BEF film 410 and second BEF film 420 can also be implemented simultaneously in the first boundary region 105 and the second boundary region 205. Continuing from the above, refer to... Figure 13 The difference between method H7 and method H5 described above lies in that the first BEF film 410 and the second BEF film are simultaneously configured to correspond to the first boundary region 105 and the second boundary region 205. Therefore, while maintaining the advantage of wide-viewing-angle light emission from the first light-emitting block 100 and the second light-emitting block 200, mutual interference or influence between different adjacent light-emitting blocks can be reduced or avoided. This configuration should be understood in conjunction with the descriptions of methods H4 to H6 above, and will not be repeated here.

[0142] In the above embodiments, the collimation calibration range is changed by altering the placement range of the second BEF film 420. However, this is merely an example, and according to other embodiments of the present invention, the collimation calibration range can also be changed by altering the placement range of the first BEF film 410, allowing it to overlap or not overlap the second BEF film 420. Furthermore, in achieving collimation calibration by stacking dual BEF films with mutually orthogonal extension directions (i.e., mutually orthogonal angles), the placement range of each BEF film and the extension direction and angle of the prism structure of each BEF film are not limited to the specific examples shown herein.

[0143] As described above, according to one embodiment, Figure 14A and Figure 14B The actual light emission angle distributions for the same light source, when passing through a single BEF film and when passing through two orthogonal BEF films, are shown respectively. Additionally, Figure 14C Show Figure 14A and Figure 14B The actual emitted light intensity (nits) or candela per square meter (cd / m²) is the light intensity corresponding to the tilt angle intercepted along the azimuth angle Ph = 0. 2 The curve of the change. Continuing from above, from... Figures 14A to 14C It can be seen that after being emitted through the first BEF film 410 and the second BEF film 420, the light can exhibit a relatively collimated brightness or at least a smaller emission angle.

[0144] As mentioned above, light can be calibrated by directly setting a collimating light source B, or by setting a wide-viewing-angle boundary light source B but separately setting a collimating film structure, so that the light emitted from the backlight module BU corresponding to the boundary light source B exhibits a more collimated brightness or at least a smaller emission angle. Furthermore, by setting at least one boundary light source B in at least one of the first boundary region 105 and the second boundary region 205, and achieving collimated light emission or at least a smaller emission angle corresponding to at least one boundary light source B, possible light leakage and interference between adjacent first light-emitting blocks 100 and second light-emitting blocks 200 can be reduced or avoided. For example, the generation of halos or glare can be reduced or avoided. Therefore, according to various embodiments of the present invention, light-emitting blocks for different display light-emitting purposes can be integrated on the backlight module BU, thereby enabling the display device 10 to achieve integrated multiple display and light-emitting functions in a limited installation space environment.

[0145] According to other embodiments of the present invention, the arrangement of a boundary light source having direct collimated light emission or collimated light emission after calibration can be applied to the boundary area of ​​adjacent light emission blocks in various ways. Furthermore, the present invention is not limited to the arrangement described above where the second light emission block 200 of the display device 10 surrounds the first light emission block 100 in a ring shape.

[0146] For example, according to another embodiment of the invention, referring to Figure 15 The illustration shows an application of a display device 20 with similar display devices 10, where different light-emitting blocks are arranged adjacently. Specifically, the display panel DP of the display device 20 may also have a display block R1 and a non-display block R2, and the backlight module BU may have a first light-emitting block 100 corresponding to the display block R1 and a second light-emitting block 200 corresponding to the non-display block R2. Furthermore, the non-display block R2 may be located on at least a portion of the outer periphery Pr of the display block R1, and the display panel DP may not have an outer frame T at least corresponding to the non-display block R2. For example, the display block R1 and the non-display block R2 may be arranged side-by-side, and the outer frame T, such as a black matrix or other light-shielding material, may extend only in the portion where the non-display block R2 is not located, without blocking light emission within the non-display block R2.

[0147] As described above, according to this embodiment, the display device 20 may, in the boundary area 150, such as the first boundary area 105, the second boundary area 205, or a combination thereof, provide a boundary light source that is directly or indirectly collimated or emits light at a smaller angle relative to other parts, in accordance with the above-described manner. Therefore, while maintaining a relatively wide light emission angle for other parts, thereby increasing or improving the viewer's viewing angle and improving light emission efficiency, it is possible to further reduce or avoid potential defects such as light leakage or interference between different light emission blocks, such as the first light emission block 100 and the second light emission block 200.

[0148] Continuing on the above, according to this embodiment, the display device 20 may further include a control module 15. The control module 15 can issue a display command I to control the display panel DP to display a predetermined image M in the display area R1. For example, but not limited to, it can control the display area R1 to play a video. Correspondingly, the display panel DP may further have a pattern layer MA disposed outside the display area R1, corresponding to a predetermined illumination range W of the second light-emitting block 200, and light rays L3 emitted from the second light-emitting block 200 can be formed into pattern light L4 through the pattern layer MA and emitted. Continuing on the above, the pattern layer MA can be arranged with desired patterns, so that light rays L3, after passing through the pattern layer MA, produce corresponding patterns to achieve the intended purpose. For example, the pattern light L4 can function as the emission of light from an instrument panel, ambient light, auxiliary lighting, indicator light, and decorative light.

[0149] As described above, according to this embodiment, diverse display and light emission functions can be achieved in a limited installation space environment by integrating different light-emitting blocks to reduce or avoid light leakage or interference in the integrated display device 20. Furthermore, a more immersive or engaging display experience can be created by utilizing the relative configuration of the display block R1, primarily used to display a predetermined image M, and the non-display block R2, primarily used for illumination or ambient light emission.

[0150] Furthermore, although the above description discloses a combination of a display block R1 and a non-display block R2, with the non-display block R2 positioned relative to the display block R1, other embodiments of the present invention are not limited to this. For example, it is also possible to configure two display blocks R1 to sandwich the periphery of a non-display block R2. Furthermore, provided that they are adjacent and have a boundary area 150, the number and configuration of the display blocks R1 and non-display blocks R2 according to various embodiments of the present invention are not limited to the specific examples herein.

[0151] In summary, the display devices proposed according to the embodiments of the present invention can integrate different light-emitting blocks and perform their respective light-emitting functions while reducing or avoiding light leakage and mutual interference. Therefore, more diverse display and light-emitting functions can be achieved in a limited installation space, improving and enriching the application performance of the display device, thereby further expanding the applicable application areas of the display device. For example, the display devices according to the embodiments of the present invention can be used as, but are not limited to, dashboards for automobiles, advertising billboards in public places, display screens for amusement facilities, and public information boards displaying time, weather, and temperature.

[0152] The above description is merely a few preferred embodiments of the present invention. It should be noted that various changes and modifications can be made to the present invention without departing from its spirit and principles. Those skilled in the art should understand that the present invention is defined by the appended claims, and that various possible substitutions, combinations, modifications, and uses, etc., within the scope defined by the appended claims, do not exceed the intended meaning of the present invention.

Claims

1. A display device comprising: A display panel having a display block configuration for displaying a predetermined image; and A backlight module is disposed below the display panel and includes a first light-emitting block and a second light-emitting block adjacent to each other, wherein... The first light-emitting block is configured to provide light to the display block; and The first light-emitting block is provided with multiple first light sources and has a first boundary area adjacent to the second light-emitting block, and the second light-emitting block is provided with multiple second light sources and has a second boundary area adjacent to the first light-emitting block. Wherein, at least one of the first boundary area and the second boundary area is provided with at least one boundary light source, and Among them, relative to the normal perpendicular to the display panel, the light emission angle of the light emitted from the plurality of first light sources or the plurality of second light sources and emitted from the backlight module is wider than the light emission angle of the light emitted from the boundary light source and emitted from the backlight module.

2. The display device as claimed in claim 1, wherein, The boundary light source includes a plurality of first boundary light sources disposed in the first boundary area, a plurality of second boundary light sources disposed in the second boundary area, or a combination of both. The exit angle of the light emitted from the plurality of first light sources is wider than the exit angle of the light emitted from the first boundary light source, and the exit angle of the light emitted from the plurality of second light sources is wider than the exit angle of the light emitted from the second boundary light source.

3. The display device as claimed in claim 2, wherein, Each of the boundary light sources includes: A boundary light source; and A collimating lens is stacked on one of the light-emitting surfaces of the boundary light source, and The collimating lens includes a flat lens block stacked on the light-emitting surface and a convex lens block disposed on the flat lens block and protruding toward the display panel.

4. The display device as claimed in claim 3, wherein, Each of the plurality of first light sources includes: A first light source; and A first diverging lens is stacked on a first emitting surface of the first light source, and The first diverging lens includes a first convex lens block stacked on the first emitting surface and protruding toward the display panel.

5. The display device as claimed in claim 4, wherein, The first diverging lens further includes a first flat lens block inserted between the first convex lens block and the first light source, and, Wherein, the thickness of the flat lens block is greater than the thickness of the first flat lens block, or the refractive index of the flat lens block is less than the refractive index of the first flat lens block, or both.

6. The display device as claimed in claim 3, wherein, Each of the plurality of second light sources includes: A second light source; and A second diverging lens is stacked on a second emitting surface of the second light source, and The second diverging lens includes a second convex lens block stacked on the second light-emitting surface and protruding toward the display panel.

7. The display device as claimed in claim 6, wherein, The second diverging lens further includes a second flat lens block inserted between the second convex lens block and the second light source, and, Wherein, the thickness of the flat lens block is greater than the thickness of the second flat lens block, or the refractive index of the flat lens block is less than the refractive index of the second flat lens block, or both.

8. The display device as claimed in claim 1, wherein, Corresponding to the vertical projection of the boundary light source, the backlight module further includes: A diffuser sheet, a first BEF film, and a second BEF film are stacked sequentially facing away from the boundary light source, and the extension directions of a plurality of first prism structures in the first BEF film are orthogonal to the extension directions of a plurality of second prism structures in the second BEF film.

9. The display device as claimed in claim 8, wherein, The diffuser and the first BEF film extend into the first light-emitting area, and the second BEF film extends into the first boundary area, the second boundary area, or a combination thereof, corresponding only to the boundary light source.

10. The display device as claimed in claim 1, wherein, The arrangement density of the plurality of first light sources is higher than the arrangement density of the plurality of second light sources.

11. The display device as claimed in claim 1, wherein, The display block includes a first polarizing layer, a liquid crystal layer, and a second polarizing layer stacked sequentially opposite to the backlight module, and In this case, at least one of the first polarizing layer and the second polarizing layer does not extend into a predetermined irradiation range of the second light-emitting block.

12. The display device of claim 1, further comprising a control module, wherein, The control module issues a display command to control the display panel so that the predetermined image is displayed in the display area.

13. The display device as claimed in claim 1, wherein, The display panel further has a pattern layer disposed outside the display block, corresponding to a predetermined illumination range of the second light-emitting block, and the light emitted from the second light-emitting block forms a pattern light emission through the pattern layer.

14. The display device as claimed in claim 1, wherein, The portion of the display panel corresponding to a predetermined illumination range of the second light-emitting block is a non-display block, and the non-display block is light-transmitting, such that light emitted from the second light-emitting block passes through the non-display block at least partially.

15. The display device as claimed in claim 14, wherein, The non-display area is located on at least a portion of the periphery of the display area, and the display panel has no outer frame corresponding to at least the non-display area.

Images