WO2021120161A1 - Dispositif d'affichage incurvé et vehicule - Google Patents

Dispositif d'affichage incurvé et vehicule Download PDF

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Publication number
WO2021120161A1
WO2021120161A1 PCT/CN2019/126915 CN2019126915W WO2021120161A1 WO 2021120161 A1 WO2021120161 A1 WO 2021120161A1 CN 2019126915 W CN2019126915 W CN 2019126915W WO 2021120161 A1 WO2021120161 A1 WO 2021120161A1
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WO
WIPO (PCT)
Prior art keywords
display panel
display device
middle frame
bottom wall
curved display
Prior art date
Application number
PCT/CN2019/126915
Other languages
English (en)
Chinese (zh)
Inventor
张宇
李会艳
耿仕新
王伯长
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2019/126915 priority Critical patent/WO2021120161A1/fr
Priority to CN201980003157.0A priority patent/CN113287159B/zh
Priority to US17/036,444 priority patent/US11300819B2/en
Publication of WO2021120161A1 publication Critical patent/WO2021120161A1/fr
Priority to US17/690,260 priority patent/US11573441B2/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • At least one embodiment of the present disclosure relates to a curved display device and a vehicle.
  • the curved display device can form a display area with a curved shape.
  • the curved display device When the curved display device is applied to a large-size display device, it can reduce the difference between the viewing angle of the user viewing the middle of the display area and the viewing angle of viewing the edge of the display area. Achieve better display effect.
  • the curved display device includes a display panel, a first middle frame, a backlight assembly and a back plate.
  • the first middle frame is located on the non-display side of the display panel and is configured to carry the display panel;
  • the backlight assembly is located on the side of the first middle frame away from the display panel, and includes an optical film and a second A middle frame, the second middle frame is located on a side of the optical film away from the display panel and is configured to support the optical film; at least part of the back plate is located on the backlight assembly away from the display One side of the panel.
  • the back plate includes a bottom plate and a side plate arranged on an edge of the bottom plate, and the second middle frame is connected to the bottom plate.
  • the bottom plate includes a bottom wall and a first support portion located outside an edge of the bottom wall, the first support portion is located on a side of the bottom wall facing the display panel, and the first support
  • the second support portion has a first support surface facing the display panel
  • the second middle frame includes a second support portion
  • the second support portion has a second support surface facing the display panel to support the optical film
  • the second supporting portion is provided on the first supporting surface of the first supporting portion.
  • the second supporting portion of the second middle frame is fixed to each other in a direction perpendicular to the first supporting surface by a first fixing member and the first supporting portion.
  • the second supporting portion includes a fixing hole penetrating the second supporting portion in a direction perpendicular to the first supporting surface, and the first fixing member is located in the fixing hole and is parallel to In the direction of the first supporting surface, the size of the fixing hole is larger than the size of the first fixing member so that there is a gap between the first fixing member and the inner side wall of the fixing hole.
  • the hardness of the material of the second middle frame is greater than the hardness of the material of the first middle frame.
  • the side of the first middle frame away from the display panel is pressed against the optical film.
  • the bottom wall includes two first sides opposite to each other, and the first side is an arc-shaped side; the first support portion includes a first arc-shaped strip corresponding to the first side Portion, the bending direction of the first arc-shaped strip portion is the same as the bending direction of the first side.
  • the fixing hole is a round hole, and along a direction parallel to the diameter of the round hole, the size of the fixing hole is larger than the size of the first fixing member.
  • the fixing hole is an elliptical hole, the major axis of the elliptical hole is parallel to the first side, and along the direction parallel to the first side, the size of the fixing hole is larger than The size of the first fixing member.
  • the bottom plate further includes a connecting portion connecting the edge of the bottom wall and the first supporting portion, and the first supporting portion extends outward from the edge of the connecting portion.
  • the backlight assembly further includes a light source assembly and a reflective sheet
  • the light source assembly includes light-emitting diodes arranged in an array
  • the reflective sheet is located on the light-emitting surface of the light source assembly and exposes the light-emitting diodes.
  • the light source assembly is arranged on a side of the bottom wall close to the display panel.
  • the second middle frame further includes an extension part connected to the second support part and partially located inside the connecting part of the back plate, and the extension part extends in a direction close to the bottom wall; The end of the extension part away from the second supporting part presses against the circumference of the reflection sheet.
  • the edge connecting the extension portion and the second support portion is located outside the edge of the extension portion pressed against the reflective sheet, and the extension portion is connected to the second support portion.
  • the edge is located on the side of the extension portion that presses the end of the reflective sheet close to the display panel, so that the inner surface of the extension portion is formed as an inclined surface, and the reflectivity of the inclined surface is not less than that of the The reflectivity of the reflector.
  • the bottom wall includes two second sides opposite to each other, the second sides are straight sides, the light-emitting diodes are located on a plurality of strip light panels, and each strip light panel The extension direction of is parallel to the second side.
  • the backlight assembly further includes at least one adapter plate located on a side of the bottom wall facing the display panel, and each adapter plate is connected to at least two of the strip-shaped lamp panels. Provide drive signal.
  • the bottom wall further includes two first sides opposite to each other, the first sides are arc-shaped sides; the connecting portion is provided with a strip-shaped outlet hole, and the connecting portion is provided with the strip The portion of the wire outlet hole is connected to the first side of the bottom wall close to the adapter plate, and the long axis of the strip wire outlet hole is parallel to the first side.
  • the curved display device further includes a light source driving board, which is located on a side of the bottom wall away from the display panel, and the adapter board communicates with the light source driving board through wires drawn from the bar-shaped outlet holes. connection.
  • a side of the bottom wall away from the display panel is provided with an arc-shaped stiffener, the extension direction of the arc-shaped stiffener is the same as the extension direction of the first side, and the arc-shaped stiffener
  • the strength of the rib is greater than the strength of the bottom wall to prevent deformation of the bottom wall.
  • the side plate extends from the outer edge of the first support portion toward the display panel, the first middle frame includes an outer frame surrounding the display panel, and a part of the outer frame is located at the display panel.
  • the outer side of the side plate is fixedly connected with the side plate.
  • the first middle frame includes a third support portion configured to carry the display panel, the third support portion has a third support surface facing the display panel, and the third support surface And the inner side of the outer frame wrapping the display panel is provided with a buffer.
  • the curved display device further includes: a front frame located on a side of the first middle frame away from the backlight assembly and configured to press against the display panel and the outer frame of the first middle frame The surface away from the side of the bottom plate to ensure the curvature of the display panel and the first middle frame.
  • the front frame includes a front frame side wall that is located away from the side plate of the outer frame, and the front frame side wall includes an elongated hole to allow the front frame side wall to pass through the
  • the second fixing member of the elongated hole is fixedly connected to the side plate, the minor axis of the elongated hole is substantially perpendicular to the first supporting surface and along the extension direction of the minor axis, the second The size of the fixing member is approximately equal to the size of the short shaft.
  • the four sides included in the display panel are connected one by one to form four corners, and the side plate surrounds at least one of the four corners of the display panel facing the third supporting surface.
  • a groove is provided on one side.
  • the material of the first middle frame is a light-shielding material.
  • the curved display device is a vehicle-mounted curved display device.
  • At least one embodiment of the present disclosure provides a vehicle including the above-mentioned curved display device.
  • FIG. 1A is an exploded schematic diagram of a curved display device according to an embodiment of the present disclosure
  • FIG. 1B is a cross-sectional view of the curved display device shown in FIG. 1A in an assembled state
  • FIG. 2A is a schematic diagram of the planar structure of the backplane shown in FIG. 1A;
  • FIG. 2B is a schematic cross-sectional view taken along line AA shown in FIG. 2A;
  • Fig. 2C is an enlarged schematic diagram of position B in Fig. 2A;
  • 3A is a first cross-sectional view of the structure diagram of the backplane and the backlight assembly shown in FIG. 1A assembling;
  • 3B is a second cross-sectional view of the assembled structure of the backplane and the backlight assembly shown in FIG. 1A;
  • 3C is an enlarged schematic plan view of the connection between the second middle frame and the first supporting portion in an example of the embodiments of the present disclosure
  • Fig. 3D is a schematic cross-sectional view taken along the line CC' shown in Fig. 3C;
  • 3E is an enlarged schematic plan view of the connection between the second middle frame and the first supporting portion in another example of the embodiments of the disclosure.
  • 3F is a schematic side view of the second middle frame shown in FIG. 3A;
  • FIG. 4A is a schematic partial plan view of the second middle frame and the optical film shown in FIG. 3A after being assembled;
  • FIG. 4B is a schematic diagram of the planar structure of the optical film shown in FIG. 4A;
  • FIG. 5A is a schematic plan view of the strip light board in the light source assembly shown in FIG. 1A and FIG. 1B;
  • Fig. 5B is a schematic plan view of the adapter plate connected to the strip light board shown in Fig. 5A;
  • 5C is a schematic diagram of assembling the back plate and the light source assembly in the curved display device shown in FIG. 1A;
  • 5D is a plan view of the side of the back plate away from the display panel in the curved display device shown in FIG. 1A;
  • Fig. 5E is a partial side view of the connecting portion of the backplane shown in Fig. 1A;
  • 6A is a partial cross-sectional schematic diagram of the assembly of the first middle frame, the backlight assembly, and the back plate in the curved display device shown in FIG. 1A;
  • Fig. 6B is a schematic plan view of the first middle frame shown in Fig. 1A;
  • Fig. 6C is an enlarged schematic diagram of position D in Fig. 6B;
  • FIG. 6D is a schematic side view of the first middle frame in FIG. 6C;
  • FIG. 7A is a schematic plan view of the front frame shown in FIG. 1A;
  • FIG. 7B is a schematic structural view of the side wall of the front frame of the front frame shown in FIG. 7A;
  • Fig. 7C is an enlarged schematic diagram of the position E in the side wall of the front frame shown in Fig. 7A;
  • Fig. 7D is a partial structural diagram of the connection between the front frame and the back plate shown in Fig. 1A;
  • FIG. 8 is a schematic diagram of a curvature tolerance relationship of a curved display device according to an embodiment of the present disclosure.
  • a curved display device includes a middle frame, which is used to support the display panel in the display device and has a light-shielding effect on the periphery of the display panel.
  • An optical film is arranged on the side of the middle frame away from the display panel, and the edge of the optical film includes a plurality of openings to be sleeved on a plurality of protrusions arranged on the edge of the side wall of the back plate to realize the fixing of the edge of the optical film .
  • the edge of the optical film and the upper edge of the side wall of the back plate will have a good bonding effect.
  • the deterioration causes wrinkles in the optical film, which in turn affects the display effect of the display device.
  • the part of the optical film excluding the edge can also be supported by a plurality of light poles arranged on the side away from the display panel. Since the light pole only supports the optical film, and is not fixedly connected to the optical film, when the above-mentioned curved display device is used in a vehicle (such as an automobile), the problem of unacceptable vibration reliability may occur.
  • a middle frame included in another curved display device is used to support the optical film and the display panel, and is required to have a greater hardness, and the support part of the middle frame for supporting the optical film has a larger thickness.
  • the expansion and contraction of the material of the middle frame will increase.
  • the middle frame expands, it will interfere with other structures such as the front frame and cause light leakage;
  • the fixed gap between the optical films is reduced, and film wrinkles occur, resulting in poor display images.
  • the upper edge of the above-mentioned middle frame and the upper edge of the side wall of the back plate are coarsely positioned by a hook structure or the like.
  • the above-mentioned fixing method of the middle frame and the side wall of the back plate will cause large assembly tolerances, which will affect the curvature accuracy of the display device.
  • the thicker thickness of the middle frame in the above-mentioned curved display device not only increases the difficulty of processing and molding, but also makes it difficult to deform during the fixing process of the middle frame and the back plate, so that it is difficult to match the curvature of the back plate. The problem.
  • the curvature tolerances of the backplane, middle frame, and front frame in the curved display device will affect the curvature accuracy of the entire curved display device. Therefore, the curvature accuracy of the current large-scale curved display device is only 10%.
  • An embodiment of the present disclosure provides a curved display device, including: a display panel, a first middle frame, a backlight assembly, and a back plate.
  • the first middle frame is located on the non-display side of the display panel and is configured to carry the display panel;
  • the backlight assembly is located on the side of the first middle frame away from the display panel, and includes an optical film and a second middle frame.
  • the film is on a side away from the display panel and is configured to support the optical film; at least part of the back plate is located on the side of the backlight assembly away from the display panel.
  • the back plate includes a bottom plate and a side plate arranged on the edge of the bottom plate, and the second middle frame is connected to the bottom plate.
  • two middle frames are arranged in the curved display device, and the second middle frame is fixed on the bottom plate of the backplane to minimize the assembly tolerance, thereby improving the curvature accuracy of the display device.
  • FIG. 1A is an exploded schematic diagram of a curved display device according to an embodiment of the present disclosure
  • FIG. 1B is a cross-sectional view of the curved display device shown in FIG. 1A in an assembled state.
  • the curved display device includes a front frame 600, a display panel 100, a first middle frame 200, a backlight assembly 300, and a back plate 400 in sequence.
  • the display panel included in the curved display device may be a liquid crystal display panel.
  • the liquid crystal display panel may include an array substrate (not shown), a counter substrate (not shown), and a liquid crystal layer (not shown) between the array substrate and the counter substrate.
  • the side of the array substrate facing the opposing substrate may include a plurality of gate lines extending in one direction and a plurality of data lines extending in another direction, and the plurality of gate lines and the plurality of data lines are intersected to define the array arrangement Of multiple pixel units.
  • Each pixel unit may include a pixel electrode and a thin film transistor, the gate line is connected to the gate of the thin film transistor to control the on or off of the thin film transistor, the pixel electrode is connected to one of the source and drain of the thin film transistor, and the data line is connected to the source of the thin film transistor. The other of the drains is connected, and the data line inputs the voltage signal required for displaying the picture to the pixel electrode through the thin film transistor to realize the display of the array substrate.
  • the counter substrate may be a color filter substrate
  • the side of the color filter substrate facing the array substrate may be provided with a color filter layer corresponding to the pixel unit and a black matrix covering a structure in the non-display area such as gate lines and data lines.
  • the side of the color filter substrate facing the array substrate may also be provided with a common electrode opposite to the pixel electrode.
  • the common electrode is configured to apply a common voltage to the pixel electrode to generate an electric field that drives the liquid crystal molecules in the liquid crystal layer to deflect.
  • the liquid crystal molecules are deflected to change the transmittance of the liquid crystal layer, thereby realizing the display of the desired grayscale image.
  • the display panel 100 may further include a first polarizer disposed on a side of the array substrate away from the counter substrate and a second polarizer disposed on a side of the counter substrate away from the array substrate.
  • the first polarizer includes a transmission axis extending in a first direction and polarizes the backlight incident therein in the first direction.
  • the second polarizer includes a light transmission axis extending in the second direction and polarizes light incident on the second polarizer in the second direction.
  • the transmission axis of the first polarizer and the transmission axis of the second polarizer are perpendicular to each other.
  • the backlight assembly 300 is located on the non-display side of the display panel 100 to provide backlight for the display panel 100.
  • the backlight assembly 300 provided by an embodiment of the present disclosure may be a direct type backlight assembly, including a light source assembly 330, an optical film 310 located between the light source assembly 330 and the display panel 100, and a side of the light source assembly 330 facing the optical film 310 ⁇ reflective sheet 340.
  • the light source assembly 330 includes light emitting diodes arranged in an array.
  • the optical film 310 may include a diffusion plate, a first diffusion sheet, a prism layer, and a second diffusion sheet stacked in sequence.
  • the material of the diffuser plate can be a light-transmitting material such as polymethyl methacrylate (PMMA) or polycarbonate (PC), which has a thicker thickness and a light transmittance between 50% and 80%.
  • the first diffuser takes into consideration the degree of haze, and the material is generally selected from materials such as polyethylene terephthalate (PET) or polycarbonate, and is arranged on the side of the diffuser away from the light source assembly , Make the light distribution more uniform.
  • the prism layer can be selected with a zigzag or wave-shaped polymethyl methacrylate and other microstructures, which has a good light-gathering effect.
  • the second diffuser chooses a material with a higher transmittance and a lower degree of matte, which can be used as a structure to protect the prism layer.
  • a certain light mixing distance is set between the light source assembly 330 and the diffuser so that the light emitted by the light source assembly 330 forms a uniform energy distribution between the light source assembly 330 and the diffuser.
  • the first diffusion sheet, the prism layer, and the second diffusion sheet are configured to uniformly take out the light emitted by the light source assembly 330.
  • the backlight assembly 300 may further include a reflective sheet 340, which is located on the light-emitting surface of the light source assembly 330 and exposes the light-emitting diodes, that is, the reflective sheet 340 includes opening areas corresponding to the light-emitting diodes one-to-one. Expose the light-emitting diodes.
  • the back plate 400 is used to support the light source assembly 330.
  • the first middle frame 200 is located on the non-display side of the display panel 100, that is, the first middle frame 200 is located between the display panel 100 and the backlight assembly 300 and is configured to carry the display panel 100.
  • the backlight assembly 300 further includes a second middle frame 320 located on a side of the optical film 310 away from the display panel 100, and the second middle frame 320 is configured to support the optical film 310.
  • the curved display device provided by the embodiment of the present disclosure further includes a back plate 400 located on the side of the backlight assembly 300 away from the display panel 100.
  • the back plate 400 includes a bottom plate 410 and a side plate 420 disposed on the edge of the bottom plate 410.
  • the second middle frame 320 is connected to On the bottom plate 410 of the back plate 400.
  • the above-mentioned “the second middle frame 320 is connected to the bottom plate 410 of the back plate 400” means that the second middle frame is in contact with the bottom plate, and in at least one direction, the second middle frame is fixedly connected to the bottom plate.
  • the assembly tolerance can be minimized, and the curvature accuracy of the display device can be improved.
  • FIG. 2A is a schematic plan view of the back plate shown in FIG. 1A
  • FIG. 2B is a schematic cross-sectional view taken along the line AA shown in FIG. 2A
  • the bottom plate 410 and the side plate 420 of the back plate 400 form an accommodation space to accommodate the backlight assembly 300.
  • the bottom plate 410 of the back plate 400 includes a bottom wall 411 and a first supporting portion 413 located outside the edge of the bottom wall 411.
  • the bottom plate 410 further includes a connecting portion 412 connecting the edge of the bottom wall 411 and the first supporting portion 413, and the first supporting portion 413 extends outward from the edge of the connecting portion 412.
  • the light source assembly 330 and the reflective sheet 340 included in the backlight assembly 300 are both located on a side surface of the bottom wall 411 facing the display panel 100, and the bottom wall 411 is used to carry the light source assembly 330 and the reflective sheet 340.
  • the bottom wall 411 in the embodiment of the present disclosure has a curved surface structure for maintaining a predetermined curvature of the display panel 100.
  • the bottom wall may be curved concavely, that is, the edge of the bottom wall is curved toward the side facing the display panel.
  • the bottom wall 411 includes two first sides 4111 opposite to each other.
  • the first sides 4111 are curved sides, such as arc sides, so that the bottom wall 411 has a curved structure.
  • the bottom wall 411 further includes a second side 4112 opposite to each other, and this embodiment is described by taking the second side 4112 as a straight side as an example.
  • the second side may also be a curved side, as long as the bottom wall enclosed by the first side and the second side has a curved structure.
  • 2B is a schematic cross-sectional view of the back plate taken along a plane parallel to the second side according to an embodiment of the present disclosure. As can be seen from FIG. 2B, the bottom wall extends substantially along a straight line in the direction along the second side.
  • the above-mentioned first side and second side refer to the side defined by the part where the bottom wall meets the connecting portion.
  • the display device provided by the embodiment of the present disclosure is a large-size display device, for example, when the size is greater than 40 inches, the arc-shaped first side 4111 has a longer length than the linear second side 4112 to achieve better display. effect.
  • an arc-shaped reinforcing rib 500 is provided on the side of the bottom wall 411 away from the display panel 100, and the extending direction of the arc-shaped reinforcing rib 500 is the same as The extension direction of the first side 4111 is the same, and the strength of the arc-shaped stiffener 500 is greater than the strength of the bottom wall 411 to effectively restrain the bottom wall 411, prevent the bottom wall 411 from being deformed, and thereby ensure the curvature of the bottom wall 411.
  • the arc-shaped reinforcing rib 500 is disposed on the side of the bottom wall 411 away from the display panel 100 to prevent the bottom wall 411 from being deformed.
  • the material of the arc-shaped reinforcing rib 500 may be an electro-galvanized steel plate with a thickness of 2 mm, and the material of the bottom wall 411 may be aluminum with a thickness of 1.5 mm.
  • the arc-shaped stiffener 500 may be located at the edge of the bottom wall 411 extending along the extending direction of the first side 4111 to better ensure the curvature of the bottom wall.
  • the side of the bottom wall away from the display panel can also be provided with an arc-shaped stiffener extending along the extension direction of the second side to further ensure the curvature of the bottom wall.
  • the arc-shaped reinforcing rib 500 may be connected to the bottom wall by a fastener, for example, the fastener may include a structure such as a screw or a bolt.
  • the two edges of the bottom wall 411 that are away from the display panel 100 and extend along the extension direction of the first side 4111 can be provided with arc-shaped stiffeners 500 to better ensure the curvature of the bottom wall 411. .
  • each arc-shaped stiffener 500 may include a central portion 501 and an edge portion 502 fixed to the bottom wall 411, and a certain distance may be set between the central portion 501 and the bottom wall 411, that is, the central portion
  • the 501 can be provided with a hollow structure to ensure strength and curvature while reducing weight.
  • the hardness of the material selected for the arc-shaped stiffener 500 is greater than the hardness of the material of the backplane to enhance the strength of the backplane and prevent the deformation of the backplane from affecting the curvature accuracy of the display device.
  • the arc-shaped rib at each edge is a continuous rib as an example, but it is not limited to this.
  • the arc-shaped rib at any edge may also include a plurality of sub-reinforcing ribs separated from each other, as long as the reinforcement
  • the ribs can only have the effect of ensuring the curvature of the bottom wall, and the number and shape of the arc-shaped reinforcing ribs are not limited in the embodiments of the present disclosure.
  • a plurality of support columns may be provided on the side of the above-mentioned arc-shaped stiffener away from the bottom wall to realize the display. Fixing of the device. For example, along the extending direction of the arc-shaped reinforcement ribs, a plurality of support columns are provided at the center of the arc-shaped reinforcement ribs to fix the curved display device on the vehicle.
  • the connecting portion 412 may be a structure surrounding the bottom plate 410, and the connecting portion 412 is used to form a light mixing cavity between the light source assembly 330 and the optical film 310 so that the light source assembly 330 and the optical A certain light mixing distance is formed between the diaphragms 310.
  • the embodiment of the present disclosure is not limited to this.
  • the connecting portion may only be provided at the position of the two first sides of the bottom wall, that is, the connecting portion connected to the bottom wall is not provided at the second side of the bottom wall, then the first support The part only includes the curved parts corresponding to the two first sides.
  • the connecting portion 412 is located at the edge of the bottom wall 411 and extends toward the side of the bottom wall 411 facing the display panel 100.
  • the end of the connecting portion 412 away from the bottom wall 411 is located outside of the connection position of the connecting portion 412 and the bottom wall 411 to facilitate the integral molding of the bottom wall and the connecting portion.
  • the embodiments of the present disclosure are not limited to this, and the connecting portion may also be perpendicular to the second side of the bottom wall, as long as the bottom wall and the first supporting portion can be connected.
  • the bottom plate 410 further includes a first supporting portion 413 extending outward from the edge of the connecting portion 412 away from the bottom wall 411, and the first supporting portion 413 is located on a side of the bottom wall 411 facing the display panel 100. side.
  • the first supporting portion 413 may be a continuous ring structure surrounding the display panel to support the second middle frame mentioned later.
  • the first support portion may also be a discontinuous ring structure, as long as it can support the second middle frame.
  • the ring-shaped first supporting portion 413 includes a first arc-shaped strip portion 4131 corresponding to the first side 4111, and the bending direction of the first arc-shaped strip portion 4131 is the same as that of the first side 4111.
  • the bottom wall in the embodiment of the present disclosure adopts a curved surface structure, and the first side of the bottom wall is an arc-shaped side, so that the first support part connected to the first side of the bottom wall through the connecting part is formed as a first support part having an arc shape. Curved strip.
  • the back plate in the embodiment of the present disclosure may be formed by an integral die-casting or stamping forming process
  • the bottom plate of the back plate may be an integrally formed structure, that is, the bottom wall, the connecting portion, and the first support portion are integrally formed structures, thereby At the same time as the curved bottom wall is formed, the first arc-shaped strip portion of the first support portion is formed.
  • the back plate can be formed by a stamping process.
  • the back plate When the back plate is formed by a stamping process, the resilience is relatively large, and an additional structure is required to ensure the curvature; the back plate can also be formed by a die-casting process (the molten iron flows into the designed In the model, and cooled to form) to reduce the material rebound rate and dehydration rate after molding.
  • the material of the back plate can be aluminum or electro-galvanized steel.
  • the material of the backplane can be based on the actual product power consumption and heat dissipation performance requirements.
  • the display device has special requirements for temperature (for example, when the white light brightness of the display device is 1000 nits, the temperature of the backplane must not be higher than 48°C).
  • the thickness of the bottom wall may be 1.5 mm, which is not limited in the embodiment of the present disclosure.
  • the first supporting portion 413 has a first supporting surface 4130 facing the display panel 100, and the first supporting surface 4130 is used to support the second middle frame 320.
  • the first supporting surface may be a continuous annular surface.
  • the first supporting surface of the first supporting portion means that the side of the first supporting portion facing the second middle frame is provided with a plane supporting the second middle frame, and the first supporting surface is defined as such a plane This is to better illustrate the positional relationship between other components and the first supporting surface, but it does not mean that the side surface of the first supporting portion must be flat.
  • the first supporting surface as a plane may be a plane located at the bottom of the convex structures or a surface passing through the side surface of the first supporting portion. A little plane.
  • the side plate 420 of the back plate 400 extends from the outer edge of the first supporting portion 413 toward the display panel 100.
  • the side plate 420 may be a ring structure surrounding the display panel 100 in a circle.
  • FIG. 2C is an enlarged view at position B in FIG. 2A.
  • the four sides of the display panel 100 are connected one by one to form four corners.
  • the side plate 420 surrounds at least one of the four corners of the display panel 100 and faces the side of the display panel 100.
  • a groove 421 is provided.
  • the bottom plate 410 and the side plates 420 in the back plate 400 may be an integrally formed structure, for example, an integral die-casting or stamping forming process may be used to form the back plate.
  • grooves are provided at at least one of the four corners of the side plate, which can prevent the side plate from being stacked at the angle of the side plate when the back plate is formed by a stamping process to form a curved structure.
  • the position is convex, so that the curvature of the first middle frame and the front frame of the back plate on the side far away from the bottom wall can be ensured, thereby ensuring the curvature accuracy of the display device.
  • FIG. 3A is the first cross-sectional view of the structure of the backplane and the backlight assembly
  • FIG. 3B is the second cross-sectional view of the structure of the backplane and the backlight assembly.
  • the backlight assembly 300 includes a light source assembly 330, a reflective sheet 340, a second middle frame 320, and an optical film 310.
  • the second middle frame 320 includes a second supporting portion 321, and the second supporting portion 321 is disposed on the first supporting surface 4130 of the first supporting portion 413.
  • the second support portion 321 is configured to support the optical film 310, that is, the second support portion 321 has a second support surface 3215 facing the display panel 100, and the second support surface 3215 is used to support the optical film 310.
  • the second supporting portion 321 includes a first portion 3216 for supporting the optical film and a second portion 3217 in contact with the first supporting portion 413 of the bottom plate.
  • the first portion 3216 of the second support portion 321 is provided with a second support surface 3215 on the side facing the optical film.
  • the second portion 3217 of the second support portion 321 extends in a direction substantially perpendicular to the second support surface 3215 and is connected to the second support surface 3215.
  • a supporting portion 413 contacts, and the first supporting portion 413 supports the second portion 3217 of the second supporting portion 321 to support the second middle frame 320.
  • the first supporting surface 4130 of the first supporting part 413 of the bottom plate 410 is fixedly connected to the second supporting part 321 of the second middle frame 320, that is, the second supporting part 321 of the second middle frame 320 is fixed to the first supporting part 321 of the bottom plate 410.
  • the support part 413 is on.
  • the first portion 3216 of the second supporting portion 321 is fixed on the first supporting portion 413 of the bottom plate 410.
  • Fig. 3C is an enlarged schematic plan view of the connection between the second middle frame and the first supporting portion in the embodiment of the disclosure
  • Fig. 3D is a schematic cross-sectional view taken along the line CC' shown in Fig. 3C.
  • the second supporting portion 321 of the second middle frame 320 (for example, the first portion 3216 of the second supporting portion 321) is fixedly connected to the first supporting portion 413 by the first fixing member 101, and the first fixing The member 101 extends in a direction perpendicular to the first supporting surface 4130 so that the first supporting portion 431 and the second middle frame 320 are fixedly connected in a direction perpendicular to the first supporting surface 4130.
  • connection of the second middle frame 320 to the bottom plate 410 of the back plate 400 in the embodiment of the present disclosure may include that the second middle frame is fixedly connected to the bottom plate along a direction perpendicular to the first supporting surface.
  • the second middle frame and the back plate are fixed in the direction perpendicular to the first supporting surface, so that the second middle frame and the back plate can be precisely positioned in the direction perpendicular to the first supporting surface, which can make the assembly Tolerance is minimized.
  • the way in which the second middle frame and the back plate are fixed in a direction perpendicular to the first supporting surface can prevent the first fixing member from affecting the curvature of the second middle frame, and can also make the second middle frame and the back plate have Better fixing and connecting effect, so that the second middle frame can match the curvature of the back plate, and thereby better guarantee the curvature of the second support portion.
  • the first fixing member 101 may be a structure such as nylon rivets, screws, etc., which is not limited in the embodiment of the present disclosure.
  • the second supporting portion 321 includes a first fixing hole 3210 penetrating the second supporting portion 321 in a direction perpendicular to the first supporting surface 4130, and the first supporting portion 413 of the bottom plate 410 includes a A fixing hole 3210 is opposite to the second fixing hole 4132.
  • the first fixing member 101 is located in the first fixing hole 3210 and the second fixing hole 4132.
  • the first fixing member 101 connects the first fixing member 101 through the first fixing hole 3210 of the second supporting portion 321 and the second fixing hole 4132 of the first supporting portion 413.
  • the second middle frame 320 is fixedly connected to the first supporting portion 413 of the bottom plate 410, and the fixing direction of the second middle frame 320 and the bottom plate 410 is a direction perpendicular to the first supporting surface.
  • the second fixing hole may be a through hole.
  • the first fixing member may be a nylon rivet or a screw.
  • the nylon rivet material is not easy to rust, will not be affected by the humidity of the external environment of the display device, and will not be placed in the display device. Abnormal noise occurs in a vibrating environment; the above-mentioned second fixing hole may also be a blind hole.
  • the first fixing member may be a screw.
  • the first fixing hole 3210 includes a first sub-fixing hole 3211 and a second sub-fixing hole 3212, and the first sub-fixing hole 3211 is located on the side of the second sub-fixing hole 3212 close to the display panel 100 .
  • the minimum size of the first sub-fixing hole 3211 is greater than the maximum size of the second sub-fixing hole 3212 so as to be formed at the connection position of the first sub-fixing hole 3211 and the second sub-fixing hole 3212
  • the step has a fixing surface 3214 facing one side of the display panel and parallel to the first supporting surface.
  • the first fixing member 101 is arranged in the first fixing hole to fix the second middle frame and the bottom plate.
  • the first fixing member 101 may include a first sub-fixing member 1011 and a second sub-fixing member 1012 connected to each other, and a third sub-fixing member 1013 located on the side of the second sub-fixing member 1012 away from the first sub-fixing member 1011 .
  • the first sub-fixing member 1011 and the second sub-fixing member 1012 may be an integral structure, and the third sub-fixing member 1013 and the second sub-fixing member 1012 are movably connected.
  • the first sub-fixing member 1011 is located in the first sub-fixing hole 3211
  • the second sub-fixing member 1012 is located in the second sub-fixing hole 3212 and the second fixing hole 4132 of the first supporting portion 413
  • the third sub-fixing member 1013 It is located on a side of the first supporting portion 413 away from the second supporting portion 321 to snap-connect the third sub-fixing member 1013 and the second sub-fixing member 1012 to fix the second middle frame and the bottom plate.
  • the size of the first sub-fixing member 1011 in the direction perpendicular to the first supporting surface is not greater than the depth of the first sub-fixing hole 3211, so as to ensure the flatness of a part of the surface of the second supporting portion for supporting the optical film.
  • the minimum size of the first sub-fixing member 1011 is greater than the maximum size of the second sub-fixing member 1012 and the maximum size of the second sub-fixing hole 3212, and the first sub-fixing member 1011
  • the maximum size of the first sub-fixing hole 3211 is smaller than the minimum size of the first sub-fixing hole 3211, so when the second sub-fixing member 1012 is disposed in the second sub-fixing hole 3212, the first sub-fixing member 1011 can be pressed onto the fixing surface 3214 (ie The first sub-fixing member is in contact with the fixing surface) to realize the fixing of the second middle frame 320 on the bottom plate 410 in a direction perpendicular to the first supporting surface 4130.
  • the first fixing hole and the through hole may be round holes, and along a direction parallel to the diameter of the round hole, the size of the first fixing hole is larger than the size of the first fixing member.
  • the diameter of the second sub-fixing hole 3212 may be 3.78 mm
  • the diameter of the second sub-fixing member 1012 may be 3.0 mm
  • the diameter of the second fixing hole 4132 may be 3.1 mm.
  • the embodiments of the present disclosure are not limited to this.
  • FIG. 3E is a schematic enlarged plan view of the connection between the second middle frame and the first supporting portion according to another example of the embodiment of the present disclosure.
  • the first fixing hole 3210 may be an elliptical hole, and the major axis of the elliptical hole is along the extension direction of the first side of the bottom wall, as long as the major axis dimension of the first fixing hole 3210 is larger than the first side.
  • the size of the fixing member 101 is sufficient.
  • the first fixing hole 3210 in this example may also include a first sub-fixing hole (not shown in the figure) and a second sub-fixing hole (not shown in the figure), and the first sub-fixing hole is located at the second sub-fixing hole.
  • the hole is near the side of the display panel.
  • the minimum size of the first sub-fixing hole is greater than the maximum size of the second sub-fixing hole to form a step at the connection position of the first sub-fixing hole and the second sub-fixing hole. It has a fixing surface facing one side of the display panel and parallel to the first supporting surface, and the first fixing member is arranged in the first fixing hole to fix the second middle frame and the bottom plate.
  • the first fixing member 101 may also include a first sub-fixing member (not shown in the figure) and a second sub-fixing member (not shown in the figure) connected to each other, and the second sub-fixing member is located far away from the first sub-fixing member.
  • the first sub-fixing member and the second sub-fixing member may be an integral structure.
  • the first sub-fixing member is located in the first sub-fixing hole
  • the second sub-fixing member is located in the second sub-fixing hole and the second fixing hole of the first support portion
  • the third sub-fixing member is located far from the first support portion.
  • One side of the two supporting parts is used to buckle and connect the third sub-fixing member and the second sub-fixing member to fix the second middle frame and the bottom plate.
  • the minimum size of the first sub-fixing member 1011 is greater than the maximum size of the second sub-fixing member 1012 and the maximum size of the second sub-fixing hole 3212, and the first sub-fixing member 1011
  • the maximum size of the first sub-fixing hole 3211 is smaller than the minimum size of the first sub-fixing hole 3211, so when the second sub-fixing member 1012 is disposed in the second sub-fixing hole 3212, the first sub-fixing member 1011 can be press-fitted on the fixing surface 3214 (ie The first sub-fixing member is in contact with the fixing surface) to realize the fixing of the second middle frame 320 on the bottom plate 410 in a direction perpendicular to the first supporting surface 4130.
  • the first sub-fixing hole may be an elliptical hole.
  • the size of the first sub-fixing member is smaller than the size of the first sub-fixing hole; along the short axis of the elliptical hole, the first sub-fixing hole
  • the size of the fixing member is approximately equal to the size of the first sub-fixing hole.
  • the second sub-fixing hole may be a circular hole or an elliptical hole.
  • the size of the second sub-fixing member is smaller than the second sub-fixing member along the long axis of the elliptical hole
  • the size of the fixing hole; along the minor axis of the elliptical hole, the size of the second sub-fixing member is approximately equal to the size of the second sub-fixing hole.
  • the minimum size of the first sub-fixing hole 3211 is larger than the maximum size of the first sub-fixing member 1011
  • the size of the second sub-fixing hole 3212 is larger than the size of the second sub-fixing member 1012, That is, the size of the first fixing hole is larger than the size of the first fixing member, so along the direction parallel to the first supporting surface 4130, there is a certain distance between the inner side of the first fixing hole 3210 and the outer edge of the first fixing member 101 , The first fixing member 101 is not in contact with the inner side of the first fixing hole 3210.
  • the aforementioned spacing provides space for expansion and contraction of the second middle frame, so as to avoid defects such as partial bulging of the second support portion.
  • the second sub-fixing member 1012 penetrates through the second sub-fixing hole 3212 and the second fixing hole in the first support portion 413, and can be combined with the first sub-fixing through the snap connection between the second sub-fixing member 1012 and the third sub-fixing member
  • the member 1011 is pressed against the fixing surface to realize a fixed connection between the second middle frame and the bottom plate in a direction perpendicular to the first supporting surface.
  • FIG. 3F is a schematic side view of the second middle frame shown in FIG. 3A.
  • the shape of a part of the supporting portion fixedly connected to the second supporting portion 321 and the first arc-shaped strip portion 4131 is an arc.
  • the partially arc-shaped support portion and the first arc-shaped strip portion 4131 are fixedly connected by a first fixing member 101 extending in a direction perpendicular to the first support surface 4130, and along the extending direction of the arc-shaped support portion, the first The size of the fixing member 101 is smaller than the size of the first sub-fixing hole so that the first fixing member 101 can move in the direction parallel to the first supporting surface 4130 in the first fixing hole 3210 relative to the second middle frame 320.
  • the second middle frame is used to support the optical film, and the second middle frame is fixedly connected to the bottom plate of the back plate, rather than the second middle frame is fixedly connected to the side plate of the back plate. Therefore, when the partially arc-shaped support portion of the second support portion undergoes thermal expansion and contraction, the distance remaining between the first sub-fixing hole and the first fixing member can prevent the arc-shaped support around the first fixing member.
  • the convex hull appears on the side facing the display panel, which seriously affects the curvature of the second middle frame, and also affects the optical film.
  • the first fixing hole in the second middle frame is only a through hole penetrated by the first fixing member, rather than a threaded hole for engaging and connecting with the first fixing member (with the first fixing member Take the screw as an example), so even if the expansion and contraction displacement of the arc-shaped support around the first fixing member is large, the obstruction of the first fixing member may cause the fixing hole to become larger, and there will be no failure of the fixing hole. . Therefore, the present disclosure adopts the first fixing member extending in a direction perpendicular to the first supporting surface to fix the bottom plate and the second middle frame, which can prevent the first fixing member from affecting the curvature of the second supporting portion, so as to better To ensure the curvature of the second support part.
  • the bottom wall may be used to maintain a predetermined curvature of the arc-shaped portion in the second support portion.
  • the strip portion corresponding to the second side in the ring-shaped first support portion is also non-arc-shaped, and the second support portion provided on the strip portion It is also non-curved.
  • the second middle frame does not have a large curvature.
  • the second middle frame of the second middle frame The supporting portion is bent according to a shape corresponding to the curvature of the first supporting portion.
  • the second middle frame 320 further includes an extension portion 322 connected to the second support portion 321, the extension portion 322 extends in a direction close to the bottom wall 411, and the extension portion 322 is away from the second support portion The end of the 321 presses against the periphery of the reflective sheet 340.
  • the extension portion included in the second middle frame is pressed against the reflective sheet provided on the bottom wall to further The second middle frame is fixed to prevent the second support portion from turning over and ensure the stability of the second middle frame.
  • extension part presses against the reflective sheet, which means that the extension part is in contact with the reflective sheet, so that while the bottom wall supports the extension part, the extension part fixes the reflective sheet and prevents the periphery of the reflective sheet.
  • Figures 1A-3F schematically show that the end of the extension part away from the second supporting part is pressed against the reflector sheet, and the extension part in the actual product is in contact with the surface of the reflector sheet.
  • the edge of the extension portion 322 connected to the second support portion 321 is located outside the edge of the extension portion 322 pressed against the reflective sheet 340, and the extension portion 322 is connected to the second support portion 321.
  • the edge is located at the side of the extension portion 322 pressing the reflective sheet 340 close to the display panel 100, so that the inner surface of the extension portion 322 is formed as an inclined surface, and the inclined surface functions as a reflective surface, such as the reflectivity of the inclined surface
  • the reflectivity of the reflector is not less than that of the reflector, so as to improve the utilization rate of the light emitted by the light source assembly 330 and improve the light efficiency.
  • the reflective film is pressed to form a light mixing space between the light source assembly and the optical film.
  • the material of the reflective sheet 340 has a flexible characteristic, and it is arranged on the curved bottom wall 411 to form a curved reflective sheet with a certain curvature.
  • the second middle frame 320 is made of a material that has a certain hardness and is also flexible.
  • the material of the second middle frame 320 may be a material mixed with 10% glass fiber in polycarbonate (PC), so as to ensure that the second middle frame has a predetermined hardness.
  • FIG. 4A is a schematic diagram of a partial plan structure of the second middle frame and the optical film shown in FIG. 3A after being assembled
  • FIG. 4B is a schematic diagram of a plan structure of the optical film.
  • the second support portion 321 of the second middle frame 320 is provided with a plurality of protrusions 3213 on the side facing the display panel.
  • At least one film (for example, the first The edge of a diffuser sheet and a second diffuser sheet) includes a plurality of openings 3200, and the plurality of openings 3200 correspond to the plurality of protrusions 3213 one-to-one so that at least one film layer of the optical film 310 excluding the diffuser plate is sleeved on the second
  • the middle frame 320 that is, the plurality of openings 3200 are set on the plurality of protrusions 3213 in one set, so that at least one film layer of the optical film 310 excluding the diffuser plate is sleeved on the second middle frame 320.
  • the second middle frame is used to support and fix the optical film (for example, the diffuser plate is pasted on the second supporting surface). Since the thermal expansion coefficient between the optical film and the material of the second middle frame is close, when the two undergo thermal expansion and contraction, the bonding effect of the edge of the optical film and the second middle frame will not be affected. Thereby ensuring the curvature of the optical film.
  • the second middle frame in the embodiments of the present disclosure has a better supporting effect on the optical film, and the setting of the light supporting pillar can be omitted. Therefore, when the curved display device is used in a vehicle, such as a car, it is also Can improve vibration reliability.
  • FIG. 5A is a schematic plan view of the strip light board in the light source assembly shown in FIGS. 1A and 1B
  • FIG. 5B is a plan view structure view of the adapter plate connected to the strip light board
  • FIG. 5C is the backplane and Schematic diagram of light source assembly assembly.
  • the light source assembly 330 included in the backlight assembly includes a plurality of strip-shaped light boards 3310, and an array of light-emitting diodes 331 are arranged on each strip-shaped light board 3310.
  • the reflective sheet 340 is located on the light-emitting surface of the light source assembly 330 and exposes the light-emitting diodes 331, that is, the reflective sheet is located on the side of the light source assembly facing the display panel, and includes multiple openings for exposing multiple light-emitting diodes, so that the light emitted by the light-emitting diodes Will not be blocked by the reflector.
  • the strip light board 3310 includes positioning holes 3312, and the bottom wall of the back plate is provided with positioning protrusions corresponding to the positioning holes 3312 on the side facing the light source assembly 330.
  • the positioning holes 3312 and the positioning holes 3312 The protrusions are engaged (for example, the positioning holes are sleeved on the positioning protrusions) to realize the positioning of the strip-shaped light board.
  • the side of the strip light board 3310 facing the bottom wall may be provided with double-sided tape.
  • the strip light board 3310 is positioned through the positioning holes 3312 and is fixedly connected to the bottom wall through the double-sided tape.
  • the strip light board 3310 further includes a third fixing hole 3313, and the reflector 340 on the side of the strip light board 3310 away from the bottom wall can pass through the third fixing hole 3313 and the bottom wall.
  • the connection is fixed, so that the strip light board 3310 is further fixed.
  • the reflective sheet 340 includes a fourth fixing hole 341 corresponding to the third fixing hole 3313. Nylon rivets are used to penetrate the fourth fixing hole and the third fixing hole to connect the reflective sheet 340 to the strip shape.
  • the light boards 3310 are all fixed on the back plate.
  • each strip light board 3310 is parallel to the second side 4112, that is, the extending direction of the strip light board 3310 intersects the extending direction of the arc-shaped first side 4111, so that To prevent the curved bottom wall of the backplane from being deformed or damaged due to the stress of the strip light panel being different from that of the strip light panel.
  • a plurality of strip-shaped light boards 3310 may be arranged along the extending direction of the first side 4111, but it is not limited to this, and a plurality of strip-shaped light boards may also be arranged in an array.
  • each strip light board 3310 further includes an adapter board connector 3311.
  • the backlight assembly further includes at least one strip-shaped adapter plate 350, and is located on the side of the bottom wall facing the display panel.
  • Each adapter board 350 includes a plurality of light bar connectors 351 to connect to the adapter board connectors 3311 of the plurality of strip light boards 3310. That is, each adapter board 350 is connected to a plurality of strip-shaped light boards 3310.
  • each adapter plate 350 extends along the extending direction of the first side 4111, and the plurality of adapter plates 350 are arranged along the extending direction of the first side 4111 and along the extending direction of the second side 4112 of the bottom wall. All 350 are located on one side of the light source assembly 330.
  • the material of the adapter plate has flexible characteristics, and an arc-shaped adapter plate with a certain curvature is formed by setting it on the curved bottom wall 411.
  • the edge of the reflective sheet 340 extending along the extending direction of the first side of the bottom wall may be provided with a slot, and the edge provided with the slot corresponds to the adapter plate, and the slot is used to avoid the adapter plate connector 3311 and the lamp. The position where the strip connector 351 is connected.
  • the adapter plate 350 is also provided with a adapter plate fixing hole 353 to achieve a fixed connection with the bottom wall.
  • FIG. 5D is a plan view of the side of the back plate away from the display panel.
  • the adapter board 350 further includes a driving connector 352 to connect the strip light board 3310 to the light source driving board 700 located on the side of the backplane away from the display panel.
  • the driving connector 352 may be connected to the light source driving board 700 through a flexible flat cable (FFC) 701.
  • FFC flexible flat cable
  • At least two strip light boards 3310 connected to each adapter board 350 can be connected to the adapter board 350 to reduce the number of strip light board output lines, thereby reducing the number of strip light board output ports.
  • the purpose is to reduce the number of drive connectors 352.
  • one adapter board 350 may be provided with eight light bar connectors 351 to connect with the adapter board connectors 3311 of the eight bar light boards 3310 to reduce the number of strip light board output ports to three. That is, the adapter board 350 connected to the eight strip light boards 3310 can be provided with three drive connectors 352 to serve as the output ports of the eight strip light boards 3310, thereby reducing the output ports of the strip light boards.
  • the embodiment of the present disclosure schematically shows the case of reducing the output port interfaces of the eight light bars to 3, but it is not limited to this, and it can also be 1, 2, 4, etc., as long as the number of light bar output ports is It is less than the number of light bars.
  • Figure 5C schematically shows a situation where two adapter boards are connected to sixteen strip-shaped light boards. The embodiment of the present disclosure does not limit the number of the adapter boards connected to the strip-shaped light boards, and can be set according to actual product requirements.
  • FIG. 5E is a partial side view of the connecting portion of the back plate shown in FIG. 1A.
  • the connecting portion 412 and one of the two first sides 4111 of the bottom wall 411 are provided with a strip-shaped outlet hole 4120, and the long axis of the strip-shaped outlet hole 4120 is parallel to the first side 4111.
  • the flexible cable 701 passes through the aforementioned strip-shaped outlet hole 4120 to realize the connection between the light source assembly 330 and the light source driving board 700.
  • the connecting portion is provided with a strip-shaped outlet hole whose long axis is parallel to the first side, which can reduce the influence of the outlet hole on the strength of the connecting portion.
  • the drive connector 352 of the adapter board 350 can be connected to the flexible flat cable 701, which passes through the bar-shaped outlet hole 4120 provided on the connecting portion 412, and extends to the side of the bottom wall 411 away from the display panel , To connect with the light source driving board 700 on the back of the display device.
  • the connecting portion is provided with a strip-shaped outlet hole, so that the light wire connecting the light source assembly and the light source driving board passes through the connecting portion instead of the bottom wall, which can reduce the influence of the outlet hole on the strength and curvature of the bottom wall .
  • the light source driving board 700 may be connected to an external power source to drive each light-emitting diode by a voltage signal such as partition and/or time sharing.
  • the light source driving board 700 may be connected by signal lines such as power lines, clock lines, input/output lines (I/O lines), etc. to control the working timing of the light source driving board 700.
  • the light-emitting diodes can be controlled in zones so that the display device can achieve the effects of good contrast and high brightness.
  • the number of light-emitting diodes needs to be set more. If each strip light board is connected to the light source driving board on the side of the backplane far away from the display panel through a signal line, you need to Opening a plurality of connection vias on the bottom wall of the backplane will affect the strength of the bottom wall.
  • the embodiment of the present disclosure can reduce the number of output ports of the strip light board by arranging the adapter plates corresponding to the plurality of strip light boards, thereby reducing the number of openings on the back board to ensure the strength of the back board.
  • a display device including: a display panel; a backlight assembly, located on the non-display side of the display panel, including a plurality of strip light panels, each The strip-shaped light board extends in the first direction; a back board, at least part of the back board is located on a side of the backlight assembly away from the display panel, wherein the back board includes a bottom wall and an edge with the bottom wall Connected side walls; the plurality of strip-shaped lamp panels are located on the side of the bottom wall facing the display panel, and the backlight assembly further includes at least one located on the side of the bottom wall facing the display panel
  • the adapter plate extends in a second direction that intersects the first direction, and each of the adapter plates connects at least two of the strip-shaped light boards to provide driving signals for them.
  • each of the strip-shaped light boards includes an adapter board connector
  • each of the adapter boards includes a plurality of light bar connectors to respectively connect the rotation of the plurality of strip-shaped light boards. Board connector.
  • the bottom wall includes a first bottom edge extending in the first direction and a second bottom edge extending in the second direction.
  • the connecting part of the second bottom side is provided with an outlet hole;
  • the display device further includes a light source driving board, which is located on the side of the bottom wall away from the display panel, and the adapter plate passes through the outlet hole The wire is connected with the light source driving board.
  • the bottom wall has a curved surface structure
  • the second bottom side is a curved side
  • the outlet hole is a strip-shaped outlet hole, and a long axis of the strip-shaped outlet hole is parallel to the second bottom side.
  • the backlight assembly further includes an optical film and a middle frame.
  • the middle frame is located on a side of the optical film away from the display panel and is configured to support the optical film.
  • the side wall provided with the outlet hole in the technical solution is the connecting portion 412 in the embodiment shown in FIG. 5E; the first bottom edge of the bottom wall in the technical solution is the implementation shown in FIG. 2A
  • the second side 4112 and the second bottom side are the first side 4111 in the embodiment shown in FIG. 2A; the middle frame in this technical solution is the second middle frame 320 in the embodiment shown in FIG. 1A.
  • FIG. 6A is a schematic partial cross-sectional view of the assembly of the first middle frame, the backlight assembly, and the back plate.
  • the side of the first middle frame 200 away from the display panel 100 is pressed against the optical film 310, that is, the surface of the first middle frame 200 away from the display panel 100 and the optical film
  • the optical film 310 is contacted to press and fix the optical film 310 to ensure the flatness of the optical film 310.
  • Fig. 6B is a schematic plan view of the first middle frame shown in Figs. 1A and 1B
  • Fig. 6C is a partial enlarged schematic view at position D in Fig. 6B
  • Fig. 6D is a schematic side view of the first middle frame in Fig. 6C
  • the first middle frame 200 may be a continuous ring structure surrounding the display panel 100 in a circle.
  • the first middle frame 200 includes an outer frame 210 surrounding the display panel 100. At least part of the outer frame 210 is located outside the side plate 420 of the back plate 400 and is fixedly connected to the side plate 420.
  • a part of the outer frame of the first middle frame may be snap-connected to the side plate to realize the positioning of the first middle frame
  • another part of the outer frame of the first middle frame may be fixedly connected to the side plate to realize the fixation of the position.
  • FIG. 6D shows the card and the hole 2020 on the outer frame of the first middle frame
  • the side plate of the back plate is also provided with cards and protrusions corresponding to the card and the hole 2020 to be engaged with the card and the hole.
  • the coarse positioning of the first middle frame That is, the cards and holes of the outer frame are sleeved on the cards and protrusions on the side plate to realize the rough positioning of the first middle frame.
  • the first middle frame may be supported by the side panels of the back panel.
  • the outer frame of the first middle frame includes a connecting hole 2021
  • the side plate of the back plate includes screw holes opposite to the connecting hole 2021 of the outer frame. Screws can be used to penetrate the connecting holes and screw holes, and the screws pass through the connecting holes 2021 of the outer frame to engage with the screw holes of the side plate, so that the first middle frame and the side plate of the back plate are fixedly connected, and the fixing direction is vertical In the direction of the side panel.
  • the connecting hole in the first middle frame (the connecting hole 2021 shown in FIG.
  • 6D is only a through hole penetrated by a screw, not a threaded hole for engaging and connecting with the screw, so even if the screw is surrounded by The expansion and contraction displacement generated by the first middle frame is relatively large, and the obstruction of the screw may cause the deformation of the connecting hole to be larger, and there will be no failure of the connecting hole.
  • the material of the first middle frame 200 may be a light-shielding material to achieve a light-shielding effect for the edge area of the display panel 100.
  • the material of the first middle frame 200 may be a flexible material to bend with other structures.
  • the material of the first middle frame 200 may be polycarbonate (PC).
  • the hardness of the material of the second middle frame 320 in the embodiment of the present disclosure is greater than the hardness of the material of the first middle frame 200.
  • the hardness of the two materials is different.
  • the material selected for the first middle frame has a low hardness, so that the curvature of the first middle frame is determined by the curvature of the front frame on the side away from the display panel. Even when deformation such as thermal expansion and contraction occurs, the front frame can be compressed with the first middle frame to minimize the amount of change in the curvature of the first middle frame.
  • the thickness of the first middle frame provided by the embodiment of the present disclosure is relatively thin, such as 0.8 mm, which can improve its curved surface forming rate.
  • the second middle frame is located on the bottom plate of the back plate. The material with greater hardness is used to support the optical film, and it can be stably set on the bottom plate to prevent the second middle frame from being caused by soft material. The necessary deformation to ensure the curvature accuracy of the optical film.
  • the first middle frame and the second middle frame provided in the display device provided by the embodiments of the present disclosure are separated from each other, which can ensure the curvature accuracy of each middle frame after the curved surface is formed; and the first middle frame and the second middle frame can pass through It is formed of different materials and formed into different thicknesses to ensure a good fit with the curvatures of other structures, so as to reduce assembly tolerances, thereby improving the curvature accuracy of the display device.
  • the first middle frame 200 includes a third support portion 230 configured to carry the display panel 100, and the third support portion 230 includes a second arc corresponding to the first arc-shaped strip portion 4131.
  • the curved strip portion 220, the second arc-shaped strip portion 220 and the first arc-shaped strip portion 4131 have the same bending direction.
  • by setting the first middle frame supporting the display panel as a curved surface structure it can be ensured that the display panel has a predetermined curvature.
  • the third supporting portion 230 includes two second arc-shaped strip portions 220 opposite to each other, and the two second arc-shaped strip portions 220 correspond to the two first sides of the bottom wall.
  • the third support portion may also include two other arc-shaped strip portions opposite to each other; when the second side of the bottom wall is a straight side, the third support portion includes The other two strips facing each other are linear strips, which are not limited in the embodiment of the present disclosure.
  • the third supporting portion 230 has a third supporting surface facing the display panel 100, and the third supporting surface is provided with a buffer 102 that can release the display panel when the display device is in a vibrating state.
  • the force between the first middle frame and the first middle frame can prevent the display panel 100 from being damaged due to external force.
  • the buffer member may be a flexible material such as foam or rubber.
  • the inner side of the outer frame 210 wrapping the sides of the display panel 100 may also be provided with a buffer 102. Therefore, when the side of the display panel is placed facing the ground, the inner side of the first middle frame supports the display panel, and the buffer provided on the inner side of the first middle frame can protect the display panel .
  • one edge of the outer frame 210 of the first middle frame 200 may be provided with a side wall retaining wall 202 and a side wall opening 201 located between adjacent side wall retaining walls 202.
  • the other edges of the outer frame 210 of the 200 may be a continuous structure including connecting holes for fixing with the back plate.
  • the outer frame 210 where the side wall retaining wall 202 is located may be an arc-shaped outer frame corresponding to the first arc-shaped strip portion, and the side wall retaining wall 202 is used to face the ground on the side of the display panel facing the side wall retaining wall 202 When placed, it supports the display panel.
  • the buffer provided on the inner side of the outer frame may be a buffer provided on the inner panel of the side wall retaining wall.
  • the display device further includes a circuit board (not shown) located on a side surface of the first support part away from the display panel and located outside the connecting part, and the circuit board passes through a side wall provided from the outer frame of the first middle frame.
  • the lead wires are connected to the display panel.
  • FIG. 7A is a schematic diagram of the plan structure of the front frame shown in FIGS. 1A and 1B
  • FIG. 7B is a schematic diagram of the structure of the side wall of the front frame of the front frame shown in FIG. 7A
  • FIG. 7C is the position E in the side wall of the front frame
  • Fig. 7D is a partial schematic diagram of the connection between the front frame and the back plate.
  • the front frame 600 is located on the side of the first middle frame 200 away from the backlight assembly 300, and is configured to press the display panel 100 to fix the display panel 100 on the first middle frame 200. That is, the front frame contacts the display panel to fix the display panel on the first middle frame.
  • the front frame 600 may be a continuous ring structure surrounding the display panel 100.
  • the material of the front frame 600 may be an electro-galvanized steel sheet with a thickness of 0.6-0.8 mm, and the curvature of the front frame may be ensured by stamping.
  • the back plate and the front frame can be made by a die-casting molding process. After molding, the material rebound and dehydration rate are less than the stamping molding process, and the statistical tolerance curvature can be ⁇ 1mm.
  • the front frame 600 may include a third arc-shaped strip portion 610 located on a side of the second arc-shaped strip portion 220 away from the first arc-shaped strip portion.
  • the above-mentioned third arc-shaped strip portion is a strip-shaped portion corresponding to the first side of the bottom wall.
  • the curvature of the third arc-shaped strip portion of the front frame is set to determine the display panel and the first side. The curvature of the middle frame.
  • the curvature of the second arc-shaped strip of the first middle frame is determined by the curvature of the third arc-shaped strip of the front frame.
  • the material of the first middle frame in the embodiments of the present disclosure is made of flexible materials to bend with the bending of the front frame, that is, the curvature of the first middle frame is determined by the curvature of the front frame on the side away from the display panel, which can be better Cooperate with the front frame to ensure the curvature of the display panel on it.
  • the curvature of the display panel is determined by the curvatures of the front frame and the first middle frame.
  • the front frame 600 includes a front frame side wall 620 located on the side of the outer frame 210 of the first middle frame 200 away from the side plate 420.
  • the front frame side wall 620 can be connected to the side of the back plate by screws.
  • the board is fixed.
  • the front frame side wall 620 includes an elongated hole 6200 so that the front frame side wall 620 is fixedly connected to the side plate 420 by a second fixing member 630 passing through the elongated hole 6200.
  • the short axis of the elongated hole 6200 is perpendicular to the first supporting surface to reduce the curvature tolerance after the front frame and the back plate are locked, that is, to reduce the curvature influence value, while using the long axis to ensure assembly deviation and improve assembly rate.
  • the screw holes of the back plate may be round holes with a diameter of 2.5 mm.
  • the screw hole on the side wall of the front frame is an elliptical hole, the size of the long axis is 4.4mm, and the size of the short axis is 3.2mm, the curvature tolerance of the front frame is ⁇ 0.7mm.
  • the size of the second fixing member matches the size of the short axis to achieve precise positioning of the front frame. That is, in the direction of the minor axis, the size of the second fixing member is approximately equal to the size of the minor axis.
  • the size difference between the second fixing member and the long axis can be between 0.81 mm and 0.96 mm; along the short axis direction, the size difference between the second fixing member and the short axis can be between 0.31 mm and 0.46 mm. between.
  • the precise positioning in the embodiments of the present disclosure means that the dimensional difference between the fixing part and the fixing hole is an assembly tolerance, and the assembly tolerance is a tolerance that exists reasonably to facilitate the installation of the fixing part into the fixing hole.
  • the size of the fixing member and the size of the fixing hole cannot be exactly the same.
  • the size of the fixing hole must exceed the fixing member, for example, more than 0.1-0.4 mm.
  • Coarse positioning means that the size difference between the fixing part and the fixing hole is greater than the assembly tolerance, so that the fixing part and the fixing hole can have a certain relative displacement in at least one direction after being fixed.
  • the fixing hole and The fixed part can move relatively in at least one direction, and the size difference between the fixed part and the fixed hole will be set to be larger than the assembly tolerance, for example, the assembly tolerance is 0.1 ⁇ 0.5mm.
  • the fixed part and the fixed The size difference between the holes can be set to 0.81 ⁇ 0.96mm.
  • FIG. 8 is a schematic diagram of a curvature tolerance relationship of a display device according to an embodiment of the present disclosure.
  • the different structures of the display device in the embodiments of the present disclosure have different curvatures.
  • each assembly surface In order to ensure the assemblability, each assembly surface must maintain the same radius of curvature.
  • the radius of curvature, R0 refers to the radius of curvature of the reference layer, and h refers to the height difference between the reference layer and the X layer.
  • the radius of curvature of the imaginary plane between the array substrate and the opposite substrate in the display panel is defined as the radius of curvature R0 of the curved display device.
  • the radius of curvature of the upper surface of the display panel away from the backplane can also be defined as R0.
  • the curvature of the display device provided by the embodiment of the present disclosure can be 4200R ⁇ 4.5%R, and 4200R refers to the radius of curvature of the display panel.
  • the chord height tolerance of the display device can be ⁇ 2mm
  • the chord height of the display device can be ⁇ 1mm.
  • the tolerance of the front frame manufactured by stamping is d1 ⁇ 0.2mm
  • the tolerance of the first middle frame manufactured by injection molding is d2 ⁇ 0.05mm
  • the gap between the first middle frame and the back plate is 0.2mm.
  • the tolerance of the back plate made by stamping method is d3 ⁇ 0.3mm, the curvature tolerance of the back plate is ⁇ 0.7mm, and the deviation tolerance from the center of the fixed hole of the back plate and the front frame to the surface of the bottom wall of the back plate away from the display panel It is d4 ⁇ 0.3mm, the screw diameter production tolerance is d7 ⁇ 0.05mm, the gap between the screw and the edge of the front frame positioning hole is 0.6mm, the offset of the center position of the front frame positioning hole is d6 ⁇ 0.05mm, and the center of the front frame positioning hole is to the front frame
  • the surface position deviation tolerance is d5 ⁇ 0.2mm, and therefore, the curvature tolerance after the above-mentioned tolerances are accumulated is 2.65mm.
  • the statistical tolerance is 1.67 mm. Therefore, it can be obtained that the curvature accuracy of the display device provided by the embodiment of the present disclosure can achieve 4.5%R.
  • the curved display device provided by the embodiment of the present disclosure may be an in-vehicle curved display device applied to a car.
  • Another embodiment of the present disclosure provides a vehicle including any of the above-mentioned curved display devices.
  • vehicles may include vehicles, airplanes, ships, subways, and other vehicles that carry people or transport goods.
  • the motor vehicle may be a vehicle such as a car or a truck.

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  • Chemical & Material Sciences (AREA)
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Abstract

L'invention concerne un dispositif d'affichage incurvé et un véhicule. Le dispositif d'affichage incurvé comprend : un panneau d'affichage (100) ; un premier cadre intermédiaire (200) disposé sur un côté de non-affichage du panneau d'affichage (100) et conçu pour supporter le panneau d'affichage (100) ; un ensemble de rétroéclairage (300) disposé sur un côté du premier cadre intermédiaire (200) qui est situé à l'opposé du panneau d'affichage (100) et comprenant un film optique (310) et un second cadre intermédiaire (320), le second cadre intermédiaire (320) étant disposé sur un côté du film optique (310) qui est situé à l'opposé du panneau d'affichage (100) et étant conçu pour supporter le film optique (310) ; et une plaque arrière (400) disposée sur un côté de l'ensemble de rétroéclairage (300) qui est situé à l'opposé du panneau d'affichage (100) et comprenant une plaque inférieure (410) et une plaque latérale (420) disposée sur un bord de la plaque inférieure (410), le second cadre intermédiaire (320) étant relié à la plaque inférieure (410). Les deux cadres intermédiaires sont disposés dans le dispositif d'affichage incurvé, et le second cadre intermédiaire (320) est fixé sur la plaque inférieure (410) de la plaque arrière (400), ce qui permet d'améliorer la précision de courbure du dispositif d'affichage.
PCT/CN2019/126915 2019-12-20 2019-12-20 Dispositif d'affichage incurvé et vehicule WO2021120161A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2019/126915 WO2021120161A1 (fr) 2019-12-20 2019-12-20 Dispositif d'affichage incurvé et vehicule
CN201980003157.0A CN113287159B (zh) 2019-12-20 2019-12-20 曲面显示装置以及交通工具
US17/036,444 US11300819B2 (en) 2019-12-20 2020-09-29 Curved surface display device having backlight assembly with frame members
US17/690,260 US11573441B2 (en) 2019-12-20 2022-03-09 Backlight assembly with frame having plurality of positioning grooves on rim

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PCT/CN2019/126915 WO2021120161A1 (fr) 2019-12-20 2019-12-20 Dispositif d'affichage incurvé et vehicule

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PCT/CN2020/093954 Continuation-In-Part WO2021243569A1 (fr) 2019-12-20 2020-06-02 Module de rétroéclairage, dispositif d'affichage et véhicule
US17/036,444 Continuation-In-Part US11300819B2 (en) 2019-12-20 2020-09-29 Curved surface display device having backlight assembly with frame members

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TWI843306B (zh) 2022-11-29 2024-05-21 友達光電股份有限公司 顯示面板

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