Display module and display device

Abstract

The utility model provides a display module and a display device. In one specific implementation mode, the display module comprises a box body and at least one display panel arranged on the box body, the box body comprises at least one installation area corresponding to the display panel, and the installation area is provided with a plurality of first magnets. The backlight side of the display panel is provided with a plurality of magnetizers used for being matched with the first magnets, the installation area is further provided with a plurality of supporting columns used for supporting the backlight side of the display panel, and orthographic projections of the supporting columns on the display panel are not overlapped with the magnetizers. The flatness of the display panel in the display module can be improved, and the display effect is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field. More specifically, relate to a display module and display device. BACKGROUND

[0002] Mini LED (Mini Light Emitting Diode) refers to the light emitting diode chip (Light Emitting Diode, LED) of the grain size in 100 μm ~ 300 μm around.Micro LED (Micro Light Emitting Diode) refers to the light emitting diode chip of the grain size below 100 μm.As self-luminous display device, Mini LED / Micro LED direct display module has the advantages such as low power consumption, high brightness, high resolution, high color saturation, fast reaction, long life, high efficiency etc..And, Mini LED / Micro LED direct display module can be seamlessly spliced by multiple Mini LED / Micro LED direct display panels, realize super large screen display, and have broad application prospect in large-size display scene such as command monitoring center, commercial center, high-end conference, cinema, live broadcast of events.The inventor finds that in the current Mini LED / Micro LED direct display module, for the product without bracket and using magnetic assembly to realize the fixation of display panel and box, there are problems such as easy warping of display panel and poor flatness of whole machine. SUMMARY

[0003] The utility model aims at providing a kind of display module and display device, to solve at least one of the problems in prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a kind of display module in the first aspect, including box and at least one display panel being set on the box, the box includes at least one installation area corresponding to the display panel, the installation area is provided with multiple first magnet, the backlight side of the display panel is provided with multiple magnetic conductive body for cooperating with the first magnet, the installation area is further provided with multiple support column for supporting the backlight side of the display panel, the orthographic projection of the support column on the display panel is not overlapped with the magnetic conductive body.

[0006] Optionally, the multiple magnetic conductive bodies include multiple first magnetic conductive bodies distributed in the backlight side edge region of the display panel.

[0007] Optionally, the orthographic projection of the support column on the display panel is located in the backlight side edge region of the display panel.

[0008] Optionally, the first magnetic conductors are surrounded by the orthogonal projections of the support columns on the display panel.

[0009] Optionally, the first magnetic conductors are evenly distributed along the backlight side edges of the display panel.

[0010] Optionally, the magnetic conductors further include at least one second magnetic conductor distributed in the central area of the backlight side of the display panel.

[0011] Optionally, the surfaces of the support columns facing the display panel and the first area of the backlight side of the display panel are respectively grinding areas, and the first area is the orthogonal projection area of the support columns on the display panel.

[0012] Optionally, the magnetic conductors are fixedly connected to the display panel.

[0013] Optionally, the mounting area is provided with a magnet seat, the first magnet is arranged in the magnet seat, and the support column is integrally formed with the box or the magnet seat.

[0014] Optionally, the display panel is a Mini LED direct display panel or a Micro LED direct display panel.

[0015] The second aspect of the present application provides a display device comprising the display module.

[0016] The present application has the following advantages:

[0017] The magnetic attraction assembly composed of the magnetic conductors and the first magnets and the support columns can improve the flatness of the display panel in the display module, including improving the flatness of each area of the display panel and the flatness between the display panels, and optimizing the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1 A display panel and a box assembly in a display module provided by an embodiment of the present application are shown.

[0020] Figure 2 A backlight side schematic view of a display panel is shown.

[0021] Figure 3 A cross-sectional view showing the position of the first magnetic conductor in one mounting area is shown.

[0022] Figure 4 A cross-sectional view showing the position of the first magnetic conductor in one mounting area is shown.Figure 2 BB cross-sectional view.

[0023] Figure 5 Another cross-sectional schematic diagram shows the location of the first magnet in two opposite edges of an installation area. Detailed Implementation

[0024] To more clearly illustrate this utility model, the following description, in conjunction with embodiments and accompanying drawings, further explains the present utility model. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of this utility model.

[0025] One embodiment of this utility model provides a display module, including a housing and at least one display panel disposed on the housing. The housing includes at least one mounting area corresponding to the display panel. The mounting area is provided with a plurality of first magnets. The backlight side of the display panel is provided with a plurality of magnetic conductors for cooperating with the first magnets. The mounting area is also provided with a plurality of support columns for supporting the backlight side of the display panel. The orthographic projection of the support columns on the display panel does not overlap with the magnetic conductors.

[0026] In a specific example, the module is displayed as follows: Figure 1 As shown, it includes a housing 100 and multiple display panels 200. Figure 1 Only one display panel 200 is shown in the image, and the housing 100 includes multiple mounting areas.

[0027] The display panel 200 can be a liquid crystal display (LCD) panel, an organic light-emitting diode (OLED) display panel, an LED direct-view display panel, a Mini LED direct-view display panel, or a Micro LED direct-view display panel, etc. The display panel 200 can also be called a light panel.

[0028] In one possible implementation, the display panel is a Mini LED direct-view display panel or a Micro LED direct-view display panel.

[0029] Continuing with the previous example, the display panel 200 is a Mini LED direct-view display panel or a Micro LED direct-view display panel.

[0030] Taking a Mini LED direct-view display panel as an example, it includes a circuit board and multiple light-emitting chips electrically connected to the circuit board, a process known as Chip-On-Board (COB) packaging, where the light-emitting chips are packaged on the circuit board. These light-emitting chips, referred to as Mini LED chips, are soldered onto the circuit board using processes such as reflow soldering. The circuit board can be, for example, a Printed Circuit Board (PCB). The light-emitting chips are located on the first side of the PCB (the light-emitting side of the display panel), while capacitors, resistors, connectors, and driver chips are soldered onto the second side (the backlight side of the display panel), forming a driving circuit. This circuit drives the light-emitting chips on the PCB to emit light. Each light-emitting chip can emit light independently under the control of the driving signals provided by the driving circuit for display purposes.

[0031] In PCB manufacturing, the PCB substrate is the basic material. Generally, the substrate is a copper-clad laminate. Single-sided and double-sided PCBs are manufactured by selectively processing the substrate material—copper-clad laminate (CCL)—through hole machining, chemical copper plating, electroplating, etching, etc., to obtain the desired circuit patterns. Another type of multilayer PCB also uses a thin copper-clad laminate as its base, and then alternately laminates conductive pattern layers with prepreg in a single process to form three or more interconnected conductive pattern layers. It has the functions of conductivity, insulation, and support.

[0032] like Figures 1-3 As shown, the first magnet 130 disposed in the mounting area of ​​the housing 100 and the magnetic conductor 210 disposed on the backlight side of the display panel 200 constitute a magnetic attraction assembly. During assembly of the display panel 200 and the housing 100, each pair of first magnets 130 and magnetic conductors 210 are magnetically attracted and fixed, and the support column disposed in the mounting area supports the backlight side of the display panel 200. Thus, for unevenness caused by deformation of the display panel 200 as a whole or in parts due to previous processes, the combination of attraction and support applied to the backlight side of the display panel 200 by the magnetic attraction assembly and the support column can effectively improve the flatness of the display panel 200 in the display module and optimize the display effect.

[0033] For example, the first magnet 130 disposed in the mounting area of ​​the housing 100 may be, but is not limited to, a permanent magnet. The magnetic conductor 210 disposed on the backlight side of the display panel 200 may be, but is not limited to, a metal sheet such as an iron sheet.

[0034] Alternatively, a second magnet can be used instead of the magnetic conductor 210, and the first magnet 130 and the second magnet can be designed as a magnetic attraction assembly. When the display panel 200 is assembled with the housing 100, each pair of first magnets 130 and second magnets 210 are magnetically attracted and fixed. This also achieves magnetic attraction and fixation, but it is necessary to consider adding a design to protect the display panel 200 from magnetic field interference.

[0035] In one possible implementation, the plurality of magnetic conductors includes a plurality of first magnetic conductors distributed in the backlight-side edge region of the display panel.

[0036] In one possible implementation, the plurality of first magnetic conductors are uniformly distributed along the backlight-side edge of the display panel.

[0037] In one possible implementation, the plurality of magnetic conductors further includes at least one second magnetic conductor distributed in the central region of the backlight side of the display panel.

[0038] The magnetic conductor distribution design and combination described above are more conducive to improving the stability of the magnetic fixation between the display panel and the cabinet, and are also more conducive to improving the flatness of the display panel in the display module by combining the magnetic components and the support columns.

[0039] Continuing with the previous example, for example Figure 1 and Figure 2 As shown, the backlight side of the display panel 200 is provided with eight first magnetic conductors distributed in the edge region of the backlight side of the display panel 200, respectively. Figure 2 The first magnetic conductor 211 is located in the middle of the left edge of the backlight side of the display panel 200; the first magnetic conductor 212 is located in the upper left corner of the backlight side of the display panel 200; the first magnetic conductor 213 is located in the middle of the upper edge of the backlight side of the display panel 200; the first magnetic conductor 214 is located in the upper right corner of the backlight side of the display panel 200; the first magnetic conductor 215 is located in the middle of the right edge of the backlight side of the display panel 200; the first magnetic conductor 216 is located in the lower right corner of the backlight side of the display panel 200; the first magnetic conductor 217 is located in the middle of the lower edge of the backlight side of the display panel 200; and the first magnetic conductor 218 is located in the lower left corner of the backlight side of the display panel 200. Figure 2 As shown, eight first magnetic conductors 211-218 are evenly distributed along the backlight side edge of the display panel 200.

[0040] For example Figure 1 and Figure 2As shown, the backlight side of the display panel 200 is also provided with a second magnetic conductor 219 located at the center of the backlight side of the display panel 200. The multiple magnetic conductors 210 include eight first magnetic conductors 211-218 and one second magnetic conductor 219. This is more conducive to improving the stability of the magnetic fixation between the display panel 200 and the housing 100, and is more conducive to the coordination of the attraction and support force applied to the backlight side of the display panel 200 by the magnetic components and support columns, thereby improving the flatness of the display panel 200 in the display module.

[0041] In one possible implementation, the magnetic conductor is bonded and fixed to the display panel. This helps to reduce deformation of the display panel and ensure its flatness.

[0042] Continuing with the previous example, taking a Mini LED direct-view display panel as an example, in common products that use magnetic components to fix the Mini LED direct-view display panel to the cabinet without a bracket, for example, the magnetic conductor of the iron sheet is fixed to the backlight side of the PCB board of the Mini LED direct-view display panel through SMT process (including sequential tinning, soldering, reflow soldering, and cooling). During the soldering process, the corresponding PCB board position will undergo high temperature and cooling processes, which can easily cause local deformation of the PCB board. From the light-emitting side, the displayed effect will be different shapes of deformation such as warped edges and corners. This implementation method uses adhesive bonding to replace the SMT process, avoiding the high temperature and cooling process when fixing the magnetic conductor 210, reducing the deformation of the PCB board from the material itself, and ensuring the flatness of the Mini LED direct-view display panel. In addition, the method of fixing the magnetic conductor 210 by applying adhesive through a fixture also has the advantages of convenient and efficient preparation and easy rework.

[0043] In one possible implementation, the orthographic projection of the support column onto the display panel is located in the backlight-side edge region of the display panel.

[0044] In one possible implementation, at least a portion of the first magnetic conductor is surrounded by the orthographic projection of the plurality of support pillars onto the display panel.

[0045] In one possible implementation, the first region of the surface of the plurality of support pillars facing the display panel and the backlight side of the display panel are respectively polishing areas, and the first region is the orthogonal projection area of ​​the support pillars on the display panel.

[0046] The distribution design of the support columns, the grinding design and combination of the support area, and their combination with the aforementioned magnetic conductor distribution design are more conducive to improving the flatness of the display panel in the display module by combining the magnetic components and the support columns.

[0047] Continuing with the previous example, for exampleFigure 2 As shown, the backlight side of the display panel 200 includes sixteen polishing areas corresponding to sixteen support pillars. Each of the eight first magnetic conductors has a polishing area on both its inner and outer sides; that is, the inner and outer sides of each first magnetic conductor correspond to the orthographic projection of a support pillar. These sixteen polishing areas are hereinafter referred to as the display panel polishing areas. For example... Figure 2 and Figure 3 As shown, the outer side of the first magnetic conductor 211 is provided with a grinding area 221 and its orthographic projection corresponds to the support column 141, and the inner side is provided with a grinding area 222 and its orthographic projection corresponds to the support column 142. The outer side of the first magnetic conductor 215 is provided with a grinding area 223 and its orthographic projection corresponds to the support column 143, and the inner side is provided with a grinding area 224 and its orthographic projection corresponds to the support column 144. The top surface of the multiple support columns including support columns 141-144 is also a grinding area, which is referred to as the support column grinding area below.

[0048] For example, when manufacturing the housing 100, the surface of the support column is precision machined, and the precision machined surfaces around the housing 100 are formed in one cut to ensure that the accuracy of these two machined surfaces is <0.1mm; at the same time, the top surface of the support column is ground to ensure that the thickness at the ground position is controlled within 0.02mm.

[0049] like Figures 2 to 4 As shown, the first area of ​​the support column corresponding to the orthographic projection of the display panel 200 is also ground. Figure 4 What is shown is Figure 2 A cross-sectional view of the grinding area 225 on the outer side of the first magnetic conductor 216 shown.

[0050] For example, such as Figure 4 As shown, when grinding the display panel 200, the area below the grinding area of ​​the display panel ( Figure 4 The image shows the display panel 200 being inverted during grinding. Figure 4The top surface (backlight side surface) has a 1mm depth reserved to prevent wiring, in order to avoid damage to the display panel 200 during the grinding process. Since wiring cannot be installed in the orthographic projection area of ​​the grinding area, no support pillars are set around the second magnet 219 located in the middle area, so as to ensure optimal flatness due to the inability to grind. By grinding the display panel 200, the thickness of a single display panel 200 can be controlled within H±0.02mm. This thickness consistency ensures better uniformity of the image display. For common display modules that include multiple display panels 200, i.e., display modules composed of multiple display panels 200 spliced ​​together, to ensure the overall thickness consistency of the multiple display panels 200, the light-emitting side surface of the display panel 200 (in this process, a black film is attached to the light-emitting side surface of the display panel 200) can be used as the precision machining reference surface. The backlight side of the display panel 200 is ground according to the design values. After grinding, the thickness from the grinding area of ​​the display panel to the precision machining reference surface is controlled within the design range, for example, a grinding amount of 0.1mm, to ensure that the display panel 200 and the cabinet 100 make proper contact and fit. In this way, when multiple display panels 200 are assembled with the cabinet 100, the overall flatness is controlled to a level that provides the best display effect.

[0051] Taking a Mini LED direct-display panel as an example, the PCB grinding process is as follows:

[0052] First, clean the base of the grinding equipment, for example by wiping with a lint-free cloth and blowing with an air gun, to prevent foreign objects from damaging the lamp panel;

[0053] Then, the lamp panel is fixed, for example by fixing it with a jig or by vacuum adsorption.

[0054] Then, grinding is performed, for example, by grinding using a CNC machine tool;

[0055] Finally, clean up the debris, for example, by washing it with water.

[0056] The above-mentioned grinding scheme is simple and convenient to operate, more efficient, and can reduce the cost of tool damage; at the same time, it can control the grinding stage difference between each display panel at a better level.

[0057] After the above grinding process, the overall flatness of the splicing display module can reach less than 0.1mm, ensuring the elimination of various defects such as warping edges and corners on the display panel. When the splicing display module is lit, the splicing display image has high uniformity from all viewing angles.

[0058] In one possible implementation, the installation area is provided with a magnet base, the first magnet is disposed in the magnet base, and the support column is integrally formed with the housing or the magnet base.

[0059] Continuing with the previous example, for example Figure 3 As shown, the installation area includes multiple magnet seats 120 embedded in the bottom plate 110 (or box support plate) of the box 100. These include magnet seats 121 and 122. A first magnet 131, which cooperates with a first magnetic conductor 211, is disposed in the magnet seat 121. A first magnet 132, which cooperates with a first magnetic conductor 215, is disposed in the magnet seat 122. The support column 141 on the outside and 142 on the inside of the first magnetic conductor 211, and the support column 143 on the outside and 144 on the inside of the first magnetic conductor 215, are integrally formed with the bottom plate 110, that is, integrally formed with the box 100.

[0060] In addition, with Figure 3 The example shown is different, such as Figure 5 In another example shown, the support column 141 on the outside of the first magnetic conductor 211 and the support column 143 on the outside of the first magnetic conductor 215 are integrally formed with the bottom plate 110ˋ of the box (i.e., integrally formed with the box 100 respectively), the support column 142ˋ on the inside of the first magnetic conductor 211 is integrally formed with the magnet base 121ˋ, and the support column 144ˋ on the inside of the first magnetic conductor 215 is integrally formed with the magnet base 122ˋ.

[0061] For example Figure 3 As shown, the diameters of the first magnets 131 and 132 are ( Figure 3 The horizontal length is 7.5mm, and the diameter of magnet bases 121 and 122 is 9.5mm. To ensure sufficient support area... Figure 4 As shown, with the diameters of the first magnets 131 and 132 both being 7.5 mm, the diameters of the magnet bases 121ˋ and 122ˋ are extended to 12 mm to 15 mm.

[0062] Another embodiment of this utility model provides a display device, including the above-mentioned display module. The display device can be, for example, an ultra-large screen splicing display device used in large-size display scenarios such as command and control centers, commercial centers, high-end conferences, cinemas, and live sports broadcasts.

[0063] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0064] It should also be noted that in the description of this utility model, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A display module, characterized in that, The device includes a housing and at least one display panel disposed on the housing. The housing includes at least one mounting area corresponding to the display panel. The mounting area is provided with a plurality of first magnets. The backlight side of the display panel is provided with a plurality of magnetic conductors for cooperating with the first magnets. The mounting area is also provided with a plurality of support columns for supporting the backlight side of the display panel. The orthographic projection of the support columns on the display panel does not overlap with the magnetic conductors.

2. The display module according to claim 1, characterized in that, The plurality of magnetic conductors include a plurality of first magnetic conductors distributed in the backlight side edge region of the display panel.

3. The display module according to claim 2, characterized in that, The orthographic projection of the support column onto the display panel is located in the backlight side edge region of the display panel.

4. The display module according to claim 3, characterized in that, At least a portion of the first magnetic conductor is surrounded by the orthographic projection of the plurality of the support columns onto the display panel.

5. The display module according to claim 2, characterized in that, The plurality of first magnetic conductors are evenly distributed along the backlight side edge of the display panel.

6. The display module according to claim 2, characterized in that, The plurality of magnetic conductors also include at least one second magnetic conductor distributed in the central region of the backlight side of the display panel.

7. The display module according to any one of claims 1-6, characterized in that, The first area of ​​the surface of the plurality of support pillars facing the display panel and the backlight side of the display panel are respectively polishing areas, and the first area is the orthogonal projection area of ​​the support pillars on the display panel.

8. The display module according to claim 1, characterized in that, The magnetic conductor is bonded and fixed to the display panel.

9. The display module according to claim 1, characterized in that, The installation area is provided with a magnet base, the first magnet is disposed in the magnet base, and the support column is integrally formed with the box or the magnet base.

10. The display module according to claim 1, characterized in that, The display panel is a Mini LED direct-view display panel or a Micro LED direct-view display panel.

11. A display device, characterized in that, Includes the display module as described in any one of claims 1-10.

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