Display module, method of manufacturing the same, and electronic device including the same

Abstract

A display module has a supporting middle frame (101) and a transparent cover plate (104), the supporting middle frame (101) has a main plate part (1011) with the same extending direction as the transparent cover plate (104) and a supporting side edge arranged around the main plate part (1011), the supporting middle frame (101) and the transparent cover plate (104) constitute a first containing space; a display unit (103) is located in the first containing space; a control plate (102) is located on the side of the main plate part (1011) away from the display unit (103), the control plate (102) is electrically connected with the display unit (103) and is used for transmitting a display signal to the display unit (103). The supporting middle frame (101) further has at least one fixing part located on the side of the main plate part (1011) away from the display unit (103) and used for fixing the control plate (102). A preparation method of the display module and an electronic device with the display module are further provided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of electronic technology, and in particular, to a display module, a manufacturing method thereof, and an electronic device comprising the same. BACKGROUND

[0002] A display module is a module that can be installed on an electronic device to provide a display function. Typically, the display module has a support member and a display unit fixed to the support member and a control circuit board for controlling the display unit, and is installed on an electronic device such as a commercial and household appliance.

[0003] Many appliances inevitably vibrate. For example, the operation of the motor of a commercial opening and closing door and a household cleaning appliance such as a vacuum cleaner, an electric mop, etc. can cause the overall strong vibration of the appliance. At the same time, the motor works at a high temperature, so that the display module is in a high temperature environment. The display module for such an electronic device needs to be able to withstand strong vibration without damage in a high temperature environment. In addition, these display modules also need to be miniaturized for the need of aesthetics and portability. With the miniaturization of the module, the size of the circuit board becomes smaller, and higher requirements are put forward for the layout of numerous connectors on the circuit board.

[0004] There is still a need for improvement for the display module for the electronic device.

[0005] SUMMARY

[0006] In one aspect, the present disclosure provides a display module, comprising:

[0007] a support middle frame and a transparent cover plate, the support middle frame comprising a main plate portion extending in the same direction as the transparent cover plate and a support side portion surrounding the main plate portion, the support middle frame and the transparent cover plate forming a first containing space;

[0008] a display unit, the display unit being located in the first containing space;

[0009] a control board, the control board being located on the side of the main plate portion away from the display unit, the control board being electrically connected to the display unit for transmitting a display signal to the display unit;

[0010] the support middle frame further comprises at least one fixing portion, the fixing portion being located on the side of the main plate portion away from the display unit, for fixing the control board.

[0011] Optionally, the fixing portion is a support fixing column, the support fixing column comprising a support portion located on the side close to the main plate portion and a connecting portion located on the side away from the main plate portion.

[0012] The connecting part comprises a limiting part and a fixing head part, one end of the limiting part is connected with the supporting part, and the other end is connected with the fixing head part;

[0013] The control plate comprises a positioning hole penetrating the control plate, the limiting part penetrates the positioning hole, and the supporting part and the fixing head part are located on two sides of the control plate respectively and cooperate with the limiting part to fix the control plate.

[0014] Optionally, the material of the fixing part comprises hot melt material.

[0015] Optionally, the display unit and the control plate are electrically connected through a flexible circuit board;

[0016] The main plate part comprises a first through hole, and the flexible circuit board penetrates the first through hole;

[0017] Optionally, the control plate comprises a second through hole, the flexible circuit board penetrates the second through hole and is connected to the side of the control plate away from the main plate part;

[0018] The display module further comprises a sealing tape, and the normal projection of the sealing tape on the extension surface of the control plate covers the second through hole.

[0019] Optionally, the supporting side edge and the main plate part form a second containing space, and at least part of the control plate is located in the second containing space;

[0020] The supporting side edge comprises a first sub-supporting side edge, the first sub-supporting side edge is arranged around the control plate, and the first sub-supporting side edge forms a side enclosure of the second containing space;

[0021] The gap between the control plate and the first sub-supporting side edge is filled with sealing glue.

[0022] Optionally, the transparent cover plate is fixed to the side of the supporting side edge close to the transparent cover plate;

[0023] The first containing space and the second containing space integrally form a sealed space.

[0024] Optionally, the supporting side edge comprises a second sub-supporting side edge and a third sub-supporting side edge arranged in parallel, the second sub-supporting side edge is closer to the display unit than the third sub-supporting side edge, and the second sub-supporting side edge is directly connected with the main plate part;

[0025] The control panel comprises an indicator light located on a side of the control panel close to the transparent cover plate; a gap exists between the second sub-supporting side edge and the third sub-supporting side edge, when the indicator light is working, the light emitted by the indicator light can be emitted to the transparent cover plate through the gap and then through the transparent cover plate.

[0026] Optionally, the transparent cover plate comprises a cover plate body and a light filtering layer located on a side of the cover plate body close to the display unit; the light filtering layer comprises a transparent region and a light shielding region arranged around the transparent region, the transparent region is used for transmitting the light emitted by the display unit;

[0027] The light filtering layer further comprises a semi-transmission region, the semi-transmission region is used for transmitting the light emitted by the indicator light when the indicator light is working, and presents the same or similar color as the light shielding region when the indicator light is not working.

[0028] Optionally, the supporting side edge comprises a plurality of fourth sub-supporting side edges, the fourth sub-supporting side edges connect the second sub-supporting side edge and the third sub-supporting side edge;

[0029] The fourth sub-supporting side edge extends along a direction parallel to the extension plane of the control panel;

[0030] The fourth sub-supporting side edge is arranged close to the control panel.

[0031] Optionally, the control panel comprises a second through hole, the flexible circuit board penetrates through the second through hole and is connected to a side of the control panel away from the main body plate part;

[0032] The control panel comprises a control panel body and a flexible circuit board connector arranged on a side of the control panel body away from the main body plate, the flexible circuit board connector is arranged adjacent to the second through hole, the flexible circuit board connector comprises a flexible circuit board connecting end;

[0033] The second through hole is a strip-shaped through hole, the extension direction of the flexible circuit board connecting end is the same as the extension direction of the second through hole;

[0034] The second through hole is located at the edge of the control panel, and the flexible circuit board connector is closer to the center of the control panel than the second through hole.

[0035] Optionally, the control panel body comprises a first positioning hole located between the second through hole and a first edge of the control panel body; the center of the first positioning hole is located in the middle 1 / 3 segment of the overall length of the hole along on a side of the second through hole close to the first positioning hole;

[0036] The fixing part comprises a first sub-fixing part, which is fixed with the first positioning hole.

[0037] Optionally, the control board comprises a touch unit connector arranged on the control board body away from the main body plate part;

[0038] When a circle is made on the plane where the touch unit connector is located with the center of the control board body as the origin, and the area of the circle covers 1 / 9 of the area of the control board, the center of the orthographic projection of the control board body on the plane is located in the circle.

[0039] Optionally, the touch unit connector comprises a touch unit connection end, which is arranged to extend away from the direction of the flexible circuit board connector.

[0040] Optionally, the display module comprises a touch unit, which is connected with the touch unit connection end through the touch unit connection line;

[0041] The control board body comprises a second positioning hole arranged adjacent to the second edge of the control board, the second edge being located on the side opposite to the first edge;

[0042] The second positioning hole is arranged adjacent to the touch unit connection line;

[0043] The orthographic projection of the touch unit connection line on the control board does not overlap with the second positioning hole;

[0044] The fixing part comprises a second sub-fixing part, which is fixed with the second positioning hole.

[0045] Optionally, the control board comprises a power input connector arranged on the control board body away from the main body plate part;

[0046] The power input connector is located on the side of the orthographic projection of the axis of the touch unit connection line on the surface of the control board body, which divides the surface of the control board body;

[0047] The power input connector comprises a power input connection end, which is arranged to extend the power connection line in the direction of the edge of the control board body, and the extension direction forms an angle with the extension direction of the touch unit connection line other than 0° and 180°.

[0048] Optionally, the control board comprises a loudspeaker connector arranged on the control board body away from the main body plate part;

[0049] The horn connector is located on a side of the control panel body surface which is different from the power input connector, and the axis of the touch unit connecting line is projected on the control panel body surface.

[0050] The horn connector comprises a horn connecting end, which is arranged to extend the horn connecting line towards the edge of the control panel body, and the extending direction is an angle other than 0° and 180° with the extending direction of the touch unit connecting line.

[0051] Optionally, the power input connecting end and the horn connecting end are arranged to make the extending directions of the power input connecting line and the horn connecting line opposite;

[0052] The power input connecting end is arranged to make the extending direction of the power input connecting line perpendicular to the extending direction of the touch unit connecting line.

[0053] Optionally, the control panel body further comprises a third positioning hole, which is located between the flexible circuit board connector and the touch unit connector;

[0054] The third positioning hole does not overlap with a straight line where a line connecting the center of the touch unit connector projected on the control panel body and the center of the flexible circuit board projected on the control panel body is located;

[0055] The fixing part comprises a third sub-fixing part, which cooperates with the third positioning hole to fix.

[0056] Optionally, the control panel comprises a processing unit arranged on a side of the control panel body away from the main body panel part.

[0057] Optionally, the control panel further comprises one or more of a Wifi module, a Bluetooth module, a temperature sensing module, a humidity sensing module, an acceleration sensing module, a gravity sensing module, a gas detection module, and a geographical position positioning module.

[0058] Optionally, the control panel body comprises a fourth positioning hole and a fifth positioning hole, both of which are arranged close to the edge of the control panel body; wherein the fourth positioning hole is located on a line connecting the first positioning hole and the second positioning hole clockwise along the edge of the control panel body; and the fifth positioning hole is located on a line connecting the first positioning hole and the second positioning hole counterclockwise along the edge of the control panel body.

[0059] The fourth positioning hole and the fifth positioning hole are arranged to make the included angle between every two lines connecting the first, second, fourth, and fifth positioning holes to the center of the control panel greater than or equal to 45 degrees.

[0060] The fixing part includes a fourth sub-fixing part that cooperates with the fourth positioning hole to be fixed; and the fixing part includes a fifth sub-fixing part that cooperates with the fifth positioning hole to be fixed.

[0061] Optionally, the control board body includes a sixth positioning hole, which is located on the straight line on both sides of the center of the orthographic projection of the touch unit connector on the control board body and the center of the orthographic projection of the flexible circuit board on the control board body.

[0062] The minimum distance between the sixth positioning hole and the edge of the control board body is farther than the minimum distance between any one of the first, second, fourth, and fifth positioning holes and the edge of the control board body.

[0063] The fixing part includes a sixth sub-fixing part that cooperates with the sixth positioning hole to be fixed.

[0064] Optionally, the control board body includes fourth, fifth, and sixth positioning holes, and the first, third, and third are respectively axially symmetrically distributed with respect to the fourth, fifth, and sixth positioning holes with respect to an axis passing through the center of the control board body.

[0065] The fixing part includes a fourth sub-fixing part that cooperates with the fourth positioning hole to be fixed; the fixing part includes a fifth sub-fixing part that cooperates with the fifth positioning hole to be fixed; and the fixing part includes a sixth sub-fixing part that cooperates with the sixth positioning hole to be fixed.

[0066] Optionally, the shape of the control board is one of a circle, an ellipse, or an N-sided polygon, where N is greater than or equal to 4.

[0067] Optionally, the maximum length of the line segment intersected by the control board center point on the extension plane of the control board is less than or equal to 20 cm.

[0068] Optionally, the shape of the display unit is one of a circle, an ellipse, or an N-sided polygon, where N is greater than or equal to 4.

[0069] In another aspect, the present disclosure provides a preparation method of the above display module, wherein the control board is assembled into the support middle frame by the following steps:

[0070] A non-heat-pressed support middle frame is provided, wherein the support part of the support fixing column has a hot-melt plastic rod, and the height of the hot-melt plastic rod is greater than the positioning hole.

[0071] passing the hot melt plastic rod through the positioning hole, with one side of the control plate contacting the support part;

[0072] heating and pressing the part of the hot melt plastic rod protruding out of the positioning hole using a hot melt press head, so that it is deformed into the fixed head part and contacts the side of the control plate away from the main plate part;

[0073] cooling and solidifying the fixed head part.

[0074] In yet another aspect, the present disclosure provides an electronic device comprising the display module according to the above.

[0075] Optionally, the electronic device is a household appliance comprising an electric motor.

[0076] Optionally, the household appliance is a household cleaning appliance. BRIEF DESCRIPTION OF DRAWINGS

[0077] Figure 1 An exploded view of one embodiment of the display module of the present disclosure is shown.

[0078] Figure 2 An appearance view of one embodiment of the support middle frame that has not yet been combined with the control plate by hot melt is shown.

[0079] Figure 3 A front view of the back of the control plate of Figure 2 is shown.

[0080] Figure 4 The support fixing column in Figure 3 is shown in close-up.

[0081] Figure 5 The support fixing column with the fixed head part after combination is shown.

[0082] Figure 6 A front appearance view of one embodiment of the support middle frame is shown.

[0083] Figure 7 An appearance view of Figure 6 cut away is shown.

[0084] Figure 8 A flexible circuit board connection schematic diagram is shown.

[0085] Figure 9 A front view of the main plate part with a first through hole is shown.

[0086] Figure 10 A back and front positioning hole arrangement schematic diagram of the control plate according to one embodiment of the present disclosure is shown.

[0087] Figure 11An opening mode of a support middle frame is shown.

[0088] Figure 12 A schematic view of a two-color light ring is shown.

[0089] Figure 13 is Figure 12 An enlarged view of the middle top square area.

[0090] Figure 14 An embodiment of a filter is shown.

[0091] Figure 15 Another embodiment of a filter is shown.

[0092] Figure 16 The appearance of a display module when not in operation and when in operation is shown.

[0093] Figure 17 and Figure 18 A hot-pressing step is shown schematically.

[0094] Figure 19 A touch slide is shown schematically.

[0095] Figure 20 The connection of a touch slide distal end interface to a touch unit connector is shown.

[0096] Figure 21 An appearance view of an assembled embodiment of the present disclosure.

[0097] Figure 22 A wiring diagram of a control board body away from the side of the main body plate (i.e. the back of the control board) is shown.

[0098] Figure 23 A functional block diagram of an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0099] A display module generally includes a display unit and a control board electrically connected to the display unit and delivering display signals to the display unit. The electrical connection between the control board and the display unit can be accomplished by a flexible circuit board. To facilitate application, these components can be properly assembled to become a display module. The assembled display module can be integrally installed on, for example, an electronic device.

[0100] An example of a control board can be a printed circuit board (PCB). The printed circuit board can have a processing chip, such as a micro control unit (MCU) on it. The processing chip can be used at least to control the display content of the display unit. An example of a flexible circuit board can be a flexible printed circuit (FPC). An example of a display unit can be a display screen.

[0101] Micro control unit is also called single chip microcomputer or single chip. In micro control unit, the frequency and specifications of central processing unit are properly reduced, and memory, counter, USB, A / D conversion, UART, PLC, DMA and other peripheral interfaces and display unit driving circuit are integrated on a single chip to form a chip-level computer, thereby providing various combined controls for different application occasions. In the present disclosure, MCU board is sometimes used as an example of control board. MCU board refers to a printed integrated circuit board containing micro control unit integrated circuit (MCU IC), which can also include FPC connector, USB, driving single chip, master input connector, touch unit connector, LED lamp, Wifi driver and other accessories. It is used to control the display unit. Specifically, the single chip can receive operation signals from the user from the touch unit connector or the master input connector, and process them into control signals accordingly. The control signals for the display unit are transmitted to the display unit through the FPC connector via the FPC and control the operation of the display unit. The control signals for the LED lamp can control the LED lamp through the circuit in the control board. Data exchange with the outside world can be achieved through USB and Wifi driver accessories. The control board can also include a power input connector for powering the control board. The control board can also have a signal interaction connector for transmitting signals between the display module control board and the whole machine control board. The signal interaction connector and the power input connector can be integrated.

[0102] In the display module of the present disclosure, FPC is sometimes used as an example of flexible circuit board. It is used to connect the micro control unit with the display unit controlled thereby. Typically, FPC can be made of polyimide as the base material, copper-clad laminate, and made by subtractive method.

[0103] The display unit in the display module controlled by the control board through the flexible circuit board can be various. For example, it can be a liquid crystal module (LCM), i.e. an assembly that assembles liquid crystal display devices, connectors, control and drive circuits, backlights, structural components, etc. It can also be other display screens, such as LED display modules, etc. The present disclosure does not particularly limit the type of display unit.

[0104] In a display module having a control board and a display unit, support components are needed to support and fix them. In the related art, the conventional way to fix the control board to the support components, such as a support plate, is to open through holes at the four corners of the control board, and to screw the screws passing through the through holes to the nuts provided in the support plate, so as to fix the control board to the support plate. As an example, according to the industrial standard, a flat head M2.5 mm screw is usually selected, the screw head diameter is 5 to 6 mm, and a safety space of 8 to 10 mm needs to be reserved around the screw. This fixing method occupies a large space, and when the display module is miniaturized, it is difficult to meet the wiring requirements of the components. For example, a display module using a 2-inch display unit, the overall size thereof should generally be below 100 mm. At this time, the control board may need to integrate MCU IC, FPC connector, FPC through hole, USB, driving single-chip microcomputer, main control input connector, touch unit connector, LED lamp, Wifi driver and many other accessories, and the wiring space is very limited. Moreover, many connector plugs required by the functions need to be arranged inside the product shape, otherwise the module and the whole machine using the module may interfere with the space, resulting in assembly failure. In this case, it is also difficult to find enough space to change the screw position at the four corners to the inside of the product.

[0105] The assembly and fixing method of the display module also affects its performance. For example, when the electronic device is working in high temperature and strong vibration, the control board installed by screwing the screws in the display module often appears deformation and bending, and the gold finger connection between the flexible circuit board for connecting the display unit and the control unit and its connector often appears deviation or even misplacement, resulting in poor display function, and even a certain proportion of the board circuit is damaged.

[0106] If the screw size is reduced to facilitate the wiring of components, on the one hand, the preparation and installation cost is increased, and on the other hand, it is more difficult to maintain firm fixation under high temperature and strong vibration conditions.

[0107] In addition, after the control board is fixed by the screw passing through the through hole, although dust can be basically prevented from passing through, water vapor can still pass through. The entry of water vapor into the module interior can cause condensate to form on the cover plate of the display surface, affecting the display effect.

[0108] In one embodiment of the present disclosure, a fixing portion provided in the support component is used to replace the screw to fix the control board to the support component.

[0109] In one embodiment of the present disclosure, a display module is provided, comprising:

[0110] a support middle frame and a transparent cover plate, the support middle frame comprising a main plate portion extending in the same direction as the transparent cover plate and a support side portion surrounding the main plate portion, and the support middle frame and the transparent cover plate constitute a first containing space;

[0111] a display unit located in the first accommodating space;

[0112] a control board arranged on the back of the main plate portion on the side away from the display unit; the control board is electrically connected with the display unit for transmitting display signals to the display unit;

[0113] The support middle frame further comprises at least one fixing portion located on the side of the main plate portion away from the display unit for fixing the control board.

[0114] The display module of the present disclosure uses the support middle frame as a support portion to support the display unit and the control board. The display module of the present disclosure further comprises a transparent cover plate for protecting the display unit. The transparent cover plate refers to a plate with at least a transparent portion. Having a transparent portion is necessary for display. The main body of the support middle frame is plate-shaped, referred to as a main plate portion. The support middle frame comprises a main plate portion extending in the same direction as the transparent cover plate and a support side edge arranged around the main plate portion. The support side edge can have a shape different from the plate shape of the main plate portion.

[0115] The support middle frame and the transparent cover plate can constitute a first accommodating space for accommodating the display unit. Specifically, the display unit is arranged between the support main body and the transparent cover plate. The light-emitting surface of the display unit, or its front surface, faces the transparent cover plate. The support middle frame is used to provide support for the display unit and the transparent cover plate.

[0116] In one specific embodiment, the display unit and the transparent cover plate are in a full-laminated structure, for example, there can be no interaction force between the main plate portion and the display unit; for example, there can be a gap between the main plate portion and the display unit, at this time the support side edge is used to provide support for the transparent cover plate, which design facilitates the assembly of the support middle frame, the transparent cover plate and the display unit.

[0117] The support middle frame is also used to provide support for the control board. The control board is located on the side of the main plate portion away from the display unit and is electrically connected with the display unit for transmitting display signals to the display unit.

[0118] Thus, the display unit and the control panel are arranged on the two sides of the main plate portion, respectively. For the convenience of description, it can be stipulated that the display unit is arranged on its front surface and the control board is arranged on its back surface. In the present disclosure, "front surface" or "front direction" refers to the direction of the light-emitting surface of the display unit, and "back surface" or "back direction" refers to the opposite direction. In other words, from the normal position of the user of the display module to watch the image displayed by the display unit, the display unit is at the proximal end, the control board is at the distal end, and the support middle frame is between the two. The side of all components facing the user is referred to as the front surface, and the other side is referred to as the back surface.

[0119] The support middle frame has a fixing part on the side of the main plate part away from the display unit, i.e. the back of the main plate part, for fixing the control plate. The display module formed in this way comprises the transparent cover plate, the display unit, the support middle frame having the fixing part on the main plate part, and the control plate fixed by the fixing part.

[0120] By fixing the control plate by the fixing part on the back of the main plate part of the support middle frame instead of screws, the aforementioned disadvantages related to screw fixing can be at least partially avoided.

[0121] The inventor found that by replacing screw fixing with the fixing part on the back of the main plate part, the problem of arranging the wiring in a small size can be solved. In one embodiment, a through positioning hole is provided on the control plate, and a protruding heat-meltable plastic cylinder is provided on the back of the main plate part as the fixing part. The plastic cylinder is inserted through the positioning hole and the protruding end thereof is heat-melted and flattened, which functions like "riveting" to fix the control plate. Compared with screw fixing, the fixing part formed by the heat-meltable plastic cylinder not only can be significantly reduced in size to save space, but also is easier to install and has lower cost. The fixing part needs at least one and can be multiple.

[0122] Moreover, the display module is easy to seal and package, so that external water vapor does not enter the internal space thereof, thereby preventing the internal wall of the transparent cover plate from being affected by condensed water vapor to affect the display effect.

[0123] In one embodiment, the fixing part is a support fixing column comprising a support part on the side close to the main plate part and a connecting part on the side away from the main plate part;

[0124] The connecting part comprises a limiting part and a fixing head part, one end of the limiting part is connected with the support part, and the other end is connected with the fixing head part;

[0125] The control plate comprises a positioning hole through the control plate, the limiting part penetrates through the positioning hole, and the support part and the fixing head part are respectively located on two sides of the control plate and cooperate with the limiting part to fix the control plate.

[0126] The control plate can have at least one positioning hole for cooperating with the connecting part of the support fixing column on the main plate part to fix the control plate to the main plate part. Multiple distributed support fixing columns and corresponding positioning holes can be provided to firmly fix the control plate.

[0127] The inventor surprisingly found that when a columnar body with a certain cross section is used as the fixing part, if the columnar body is configured to directly protrude from the main plate part, stress concentration will occur at the bottom of the columnar body after being fixed due to the small cross-sectional area of the columnar body, which can cause the main plate part to locally deform in the direction perpendicular to the plate surface. The deformation of the main plate part for fixing the control plate will cause the control plate to also deform and be unevenly stressed. Especially in the case of high temperature and strong vibration, this will easily lead to damage of the control plate, and further lead to failure of the display module.

[0128] To solve this problem, the support fixing column of the present disclosure can include a support part located on the side close to the main plate part and a connecting part located on the side away from the main plate part. In other words, it can include a support part at the bottom and a fixing part at the top. For the convenience of description, in the present disclosure, "bottom" and "top" are relative to the base on which the structure is located. Here, the bottom and top of the support fixing column are relative to the main plate part as its base. That is, the end of the support fixing column close to the main plate part is its bottom, and the end away from the main plate part is its top. The support fixing column of the present disclosure is arranged on the back of the main plate part, and can provide sufficient support to the control plate in the direction perpendicular to the surface of the main plate part. Compared with the lateral support and fixation of the main plate part at the edge of the main plate part extending in parallel to the direction of the main plate part, the support fixing column of the present disclosure provides effective support to the control plate in the thickness direction which is prone to deformation. In particular, when it is arranged in the middle of the module, it can effectively prevent the collapse deformation of the middle of the control plate.

[0129] The support fixing column of the present disclosure includes a special support part, which is used as the basis of the connecting part and supports the control plate. The limiting part of the connecting part can protrude from the center of the support part to cooperate with the positioning hole of the control plate. After being installed with the control plate, the top of the support part can be in contact with the plate surface around the positioning hole of the control plate. Compared with the limiting part of the connecting part passing through the positioning hole on the top of the support part, the support part has a larger lateral cross-sectional area. Therefore, compared with protruding the limiting part directly from the main plate part, this can significantly reduce the stress concentration of the support fixing position and the deformation caused thereby. In addition, the height of the support part will separate the control plate from the main plate part. Compared with the case where the control plate is in close contact with the main plate part when no support part is arranged, the vibration of the micro control unit with the main plate part can be significantly reduced, effectively reducing the failure.

[0130] The support portion has a connecting portion on the side away from the main plate portion, which includes a limiting portion and a fixing head portion. The limiting portion passes through the positioning hole, and the fixing head portion contacts the surface of the control plate on the side away from the main plate portion. The side of the fixing head portion facing the control plate is spaced apart from the side of the support portion facing the control plate by a distance equal to the thickness of the control plate, so that the control plate is clamped therebetween. The limiting portion passes through the positioning hole, so that the control plate does not move relative to the main plate portion in the extension direction of the main plate portion. Thus, the support portion, the fixing head portion and the limiting portion cooperate to fix the control plate.

[0131] The support portion and the limiting portion protrude from the main plate portion and can be integrally formed with the main plate portion.

[0132] The fixing head portion can be of the same material as the limiting portion and integrally formed therewith, or can be additionally bonded to the limiting portion. In one embodiment, the length of the limiting portion can exceed the height of the positioning hole before installation, and the excess portion can be formed into the fixing head portion by hot melting and pressing. In another embodiment, the fixing head portion is formed by separately applying glue or separately applying hot melting material and bonded to the top end of the limiting portion.

[0133] In one embodiment, the limiting portion passes through the positioning hole and has a height equal to the height of the positioning hole, the fixing head portion covers the positioning hole and contacts the back surface of the control plate, and the support portion contacts the front surface of the control plate, so that the main plate portion supports the control plate through the support portion and fixes the control plate through the fixing head portion. Ideally, in the direction of a plane parallel to the extension of the control plate, the area of the positioning hole can be the same as the cross-sectional area of the limiting portion to achieve the best limiting effect. However, in practice, the area of the positioning hole is slightly larger than the cross-sectional area of the limiting portion in the hole, so that the limiting portion can easily pass through during assembly.

[0134] The material of the fixing portion can include hot melting material. The hot melting material can enable the control plate to be fixed to the support middle frame by a hot pressing step. One example of the hot melting material is polycarbonate (PC).

[0135] In one embodiment, the main plate portion, the support portion, the limiting portion and the fixing portion are all formed of the same hot melting material.

[0136] The fixing head portion can be formed by a hot pressing step on the hot melting material, playing a role of "riveting".

[0137] Typically, the fixing head portion is formed by:

[0138] A support middle frame is provided which has a hot melting plastic rod on the support portion of the support fixing column, the height of the hot melting plastic rod being greater than the height of the positioning hole.

[0139] The hot-melt plastic rod is inserted through the positioning hole, so that the front surface of the control board contacts the support portion;

[0140] The portion of the hot-melt plastic rod extending out of the positioning hole is heated and pressed by a hot-melt press head, so that it is deformed into the fixed head portion and contacts the back surface of the control board;

[0141] The fixed head portion is allowed to cool and solidify.

[0142] The fixed head portion formed by hot-pressing completely presses the back surface of the control board, so that the front surface of the control board is firmly attached to the top of the support portion of the main plate portion. The main plate portion supports the control board through the support portion and fixes the control board through the fixed head portion. Typically, the fixed head portion is in the shape of a round cake. The fixed head portion formed by hot-pressing also has a good water vapor barrier effect on the positioning hole.

[0143] As described above, the limiting portion passes through the positioning hole and has a transverse limiting effect on the control board. The diameter of the limiting portion is much smaller than that of a conventional screw, and the diameter of the fixed head portion is also much smaller than that of a conventional screw head, thereby saving space. Thus, the flexibility of the design of the support and fixing point is significantly increased, and the problem of the layout of the cloth is effectively solved.

[0144] Through the plurality of support fixing columns with support portions located on the back surface of the main plate portion, a small-sized display module capable of working in a high-temperature and strong-vibration environment can be achieved, in which the control board is not easily damaged.

[0145] Figure 1 An exploded view of one embodiment of the display module of the present disclosure is shown. In the figure, the transparent cover plate 104 can include an annular filter 1041, a cover plate main body 1042, a double-sided adhesive tape 1043, and a protective film 1044. The display unit 103 is in the first accommodating space between the support middle frame 101 and the transparent cover plate 104, i.e., the front surface of the support middle frame 101. The control board 102 is on the side of the main plate portion 1011 of the support middle frame 101 away from the display unit 103, i.e., the back surface of the support middle frame 101.

[0146] Figure 1 It is also shown in the figure that the display module can optionally include a touch slide 106, the touch operation end of which extends out of the edge of the support middle frame. The user can control the control board through the touch slide, and then control the display unit located on the front surface of the support middle frame through the flexible circuit board.

[0147] Figure 2 An appearance view of one embodiment of the support middle frame 201 that has not yet been combined with the control board by hot-melt is shown. In the figure, the back surface is mainly shown. In the figure, the main plate portion 2011, the support side edge 2012, the support fixing column 2013, and the buckle 2015 are shown.

[0148] Figure 3 It shows Figure 2 The front view of the rear of the support frame 301. The cross shape on the main plate 3011 of the support frame 301 represents the support fixing column 3013. Figure 3 The diagram also shows a support side 3012 around the back and a gap 3016 that can be used to emit light through the indicator light described later.

[0149] Figure 4 The support post 4013 is shown. It can be seen that it consists of a cross-shaped support portion 40131 and a heat-fused plastic post 40132 at the top of the support portion. When the control plate is installed with the support frame having such a support post, the plastic post 40132 passes through the positioning hole on the control plate, and its top is heated and compressed into a disc-shaped fixing head. The undeformed portion becomes a limiting part, thereby fixing the control plate.

[0150] Figure 5 An embodiment is shown, illustrating a combined support post 5013 with a fixed head. In the figure, 5011 is the main body plate supporting the middle frame, 50131 is the support portion supporting the support post 5013, 50132 is the connecting portion fixing the support post 5013, 50132a is a limiting portion, 50132b is the fixed head, 502 is the control plate, and 5021 is a positioning hole. It can be seen that the support portion 50131, the limiting portion 50132a, and the fixed head 50132b cooperate to fix the control plate 502.

[0151] The support portion can be any suitable shape. Preferably, the support portion is as follows: Figure 4 The cross shape shown can also be, for example, straight or H-shaped. These shapes form reinforcing ribs, are easy to manufacture, and provide excellent mechanical reinforcement and shock absorption. A cross shape is more preferred for the support because of its superior strength.

[0152] In one embodiment, the limiting part is cylindrical with a diameter of 1.2 mm ± 0.05 mm; the positioning hole is cylindrical with a diameter of 1.4 mm ± 0.05 mm; and the fixing head is disc-shaped with a diameter of 2.0 mm ± 0.05 mm and a height of 0.4 mm ± 0.01 mm. To save space, the diameter of the limiting part can preferably be designed to be the smallest diameter that can be produced by conventional non-high-precision plastic molds, approximately 1.2 mm. Correspondingly, the size of the positioning hole is slightly larger than this to allow it to pass through, approximately 1.4 mm. The size of the fixing head is only required to cover the positioning hole to provide a firm fit, and can be as small as possible to save space. Therefore, a fixing head with a diameter of approximately 2 mm and a thickness of approximately 0.4 mm is suitable.

[0153] In one implementation, the dimensions of the support portion can be substantially the same as the dimensions of the corresponding fixing head to facilitate fixing. For example... Figure 5 As shown, the support portion 50131 and the fixed head 50132b are substantially the same in size. A larger support portion is also possible. Optionally, the bottom cross-sectional area of ​​the support portion can be larger than its top cross-sectional area, thereby further avoiding stress concentration while saving contact area.

[0154] In one embodiment, the fixing head in the support fixing column is an adhesive applicator. That is, adhesive is applied to the top of the limiting part that passes through the positioning hole, and then the adhesive is allowed to cure and bond with the limiting part to form a fixing head that cooperates with the limiting part and the support part to fix the control plate.

[0155] In one embodiment, the fixing head can be formed by thermoforming. However, if the fixing head is damaged during the removal of the control panel, the original support fixing column can no longer form a fixing head by thermoforming. In this case, the removed fixing head can be repaired using the above-described adhesive dispensing method.

[0156] Specifically, to facilitate rapid turnover and packaging after completion, similar to hot melt adhesives, fast-curing adhesives can be selected for dispensing. However, to maintain the adhesive form, UV-curing adhesives are preferred over quick-drying adhesives. Furthermore, if the assembly cycle has lower production speed requirements, dispensing can be used directly. Alternatively, low-flow hot melt adhesives can be used, which are then heat-fused for fixation.

[0157] In one embodiment, the display unit and the control board are electrically connected via a flexible circuit board;

[0158] The main body plate includes a first through hole, through which the flexible circuit board passes.

[0159] The first through-hole allows the flexible circuit board to pass through the main board and connect to the display unit and control board located on both sides of the main board. The first through-hole can be an elongated through-hole.

[0160] Figure 2 2014 and Figure 3 3014 in the diagram shows the elongated first through-hole.

[0161] In one embodiment, the control board includes a second through hole, through which the flexible circuit board passes and is connected to the side of the control board away from the main body plate.

[0162] The display module also includes sealing tape, the orthographic projection of which covers the second through hole on the extended surface of the control board.

[0163] It can be understood that, when the second through hole is sealed by the sealing tape, water vapor can be prevented from entering the first accommodating space, and display reliability of the display module is ensured.

[0164] When the flexible circuit board connector on the control plate is on the side of the control plate away from the main plate portion, the second through hole is used to enable the flexible circuit board to pass through the control plate to connect to the flexible circuit board connector. The second through hole can also be an elongated through hole.

[0165] For example, when the flexible circuit board is an FPC, the control plate has a second through hole and an FPC connector mounted on the back of the control plate. The second through hole on the control plate is opposite the first through hole on the main plate portion, and the FPC passes through the first through hole on the main plate portion and the second through hole on the control plate in sequence from the display unit to connect to the FPC connector.

[0166] The second through hole and the first through hole form a passage from the outside of the control plate to the display unit. In order to increase the sealing performance, the display module further comprises a sealing tape, and a projection of the sealing tape on the extension surface of the control plate covers the second through hole. The sealing tape can fix the flexible circuit board while sealing the second through hole. More preferably, the projection of the sealing tape on the extension surface of the control plate covers the second through hole, at least part of the flexible circuit board connector, and the flexible circuit board running between the second through hole and the flexible circuit board connector. Such a large sealing tape can reduce the possibility of gaps when pasted and provide more effective sealing.

[0167] In one embodiment, on the back of the control plate, the second through hole is sealed by a high-temperature-resistant tape. The high-temperature-resistant tape is thin and soft, and has small stress. The tape completely fits around the second through hole, and will not open when the flexible circuit board generates heat, thereby sealing the product from dust and water vapor.

[0168] Figure 8 A cross-sectional structure through the second through hole is shown. In the figure, 801 is a support middle frame, 802 is a control plate, 803 is a display unit, 804 is a transparent cover plate, and 805 is a flexible circuit board. The flexible circuit board 805 passes through the first through hole 8014 of the support middle frame 801 and the second through hole 8022 on the control plate 802 from the display unit 803 to connect to the flexible circuit board connector 8024 on the back of the control plate 802. As shown, the high-temperature-resistant tape 8025 seals the second through hole 8022 and also covers the flexible circuit board 805 and the flexible circuit board connector 8024. Figure 8

[0169] In one embodiment, the support side edge and the main plate portion form a second accommodating space, and at least part of the control plate is located in the second accommodating space.

[0170] ​The support side edge comprises a first sub-support side edge, which is arranged around the control panel and constitutes a side wall of the second accommodating space.

[0171] The gap between the control panel and the first sub-support side edge is filled with sealing glue.

[0172] Figure 5 The first sub-support side edge 50121 is shown as an example. The first sub-support side edge 50121 constitutes a side wall, which constitutes a side wall of the second accommodating space accommodating the control panel. The gap between the control panel 502 and the first sub-support side edge 5021 is filled with sealing glue 507. Specifically, the sealing glue 507 is arranged on the side of the gap between the control panel 502 and the first sub-support side edge 5021 away from the control panel, and / or the sealing glue 507 is arranged in the gap between the control panel 502 and the first sub-support side edge 5021. The sealing glue can prevent water vapor and dust from entering the inside of the display module from the gap, thereby achieving product dustproof and water vaporproof sealing, and can also play a certain fixing role.

[0173] Figure 8 The first sub-support side edge 80121 is also shown as a side wall. As shown in Figure 8 , the gap between the first sub-support side edge 80121 and the control panel 802 is sealed with sealing glue 807.

[0174] Incidentally, Figure 5 The cross-sectional view shows a cross section passing through the fixing portion and the indicator light, while Figure 8 The schematic view shows a cross section passing through the first through hole, the second through hole, the flexible circuit board connector, and the fourth sub-support side edge, but not passing through the fixing portion and the indicator light.

[0175] In one embodiment, the transparent cover plate is fixed to the support side edge on the side close to the transparent cover plate;

[0176] The first accommodating space and the second accommodating space constitute a closed space as a whole.

[0177] As Figure 5As shown, the transparent cover plate 504 is also fixed to the support side 5012 near one side thereof. The fixing manner can be using sealant adhesion. The transparent cover plate 504 can include a filter 5041 and a cover plate body 5042. The cover plate body can be, for example, a glass cover plate. The support side 5012 is fixed to the transparent cover plate at one side thereof and forms a seal, which includes the first sub-support side 50121 that cooperates with the control plate to form a seal, so that the first accommodation space and the second accommodation space can constitute a closed space as a whole. The two can be in communication with each other through the aforementioned first through hole on the main body plate portion. However, this space is sealed from the outside. In one embodiment, the front surface of the support side of the support middle frame is fixed in close combination with the transparent cover plate, which can be fixed by, for example, sealant adhesion; the gap between the back surface of the support middle frame and the first sub-support side of the control plate is filled with sealant; the second through hole in the control plate is sealed by a sealant tape; and the positioning hole in the control plate is sealed by the fixing head portion. Figure 8 The same structure is also shown in Figure 8 An optional double-sided adhesive tape 8043 is also provided between the filter layer 8041 and the cover plate body 8042 of the transparent cover plate 804. When the filter layer is a separate filter sheet, the double-sided adhesive tape can be used to adhere it to the cover plate body. When the filter layer is a film layer formed directly on the cover plate body, such as a film layer deposited or coated directly on the cover plate, the double-sided adhesive tape can be omitted.

[0178] Figure 6 A front view of one embodiment of the support middle frame is shown, in which a display unit 602 is embedded in the front surface.

[0179] Figure 7 A cross-sectional view of Figure 6 is shown. Figure 7 A flexible circuit board 705 connected to the display unit 702 and passing through the first through hole 7014 on the support middle frame 701 is shown. Figure 7 A cross-sectional view of one embodiment of the support side around the main body plate portion is also shown in

[0180] In one embodiment, the support side includes a second sub-support side and a third sub-support side arranged in parallel, wherein the second sub-support side is closer to the display unit than the third sub-support side, and the second sub-support side is directly connected to the main body plate portion, and specifically, the side surface of the third sub-support side away from the second sub-support side can be the same surface as the side surface of the first sub-support side away from the control plate. The same surface can be understood as a surface that does not have a significant step when it is extended.

[0181] Specifically, the support side can be made by one process. Specifically, the first support side, the second support side and the third support side are made of the same material and can be made by one process. Specifically, the support side and the main plate part can be made by one process. The one process can be a molding process, in particular an injection molding process. The main plate and the support side can be made of thermoplastic by injection molding.

[0182] In one embodiment, the control board comprises an indicator light, which is located on the side of the control board close to the transparent cover plate; there is a gap between the second support side and the third support side, when the indicator light is working, the light emitted by the indicator light can pass through the gap and be emitted to the transparent cover plate and pass through the transparent cover plate.

[0183] The control board can have an indicator light installed on its front face. An example of the indicator light can be an LED light. It can be a decorative light for decoration, an indicator light for indication, etc. In this way, additional visual effects can be provided for the user outside the display unit. The indicator light is controlled by the control board. Since it is a component of the control board, it is located on the side of the main plate part away from the display unit. In order to enable the user to see the indicator light on the front face of the display module, a gap should be provided in the support middle frame through which the light emitted by the indicator light can pass. In other words, the support middle frame can have an indicator light light-emitting hole opposite the indicator light. The indicator light light-emitting hole enables the light emitted by the indicator light on the control board located on the back of the support middle frame to be emitted from the front face of the display module without being blocked by the support middle frame. Alternatively, the indicator light on the front face of the control board is arranged as a light ring around the peripheral area of the board so as not to occupy the display space of the central display unit. The peripheral area is not limited to making a light ring, but can also make LED characters required by the product, etc.

[0184] Correspondingly, the indicator light light-emitting hole is provided in the support middle frame so that the light emitted by the indicator light on the control board located on the back of the support middle frame can be emitted from the front face of the display module without being blocked by the support middle frame. The indicator light light-emitting hole is thus provided at a position opposite the indicator light.

[0185] In one embodiment, the indicator light light-emitting hole is a plurality of holes arranged along the periphery of the support middle frame. As shown in FIG. Figure 9 The periphery of the support middle frame can be arranged with the indicator light light-emitting hole or gap 9016, as shown in FIG. Figure 12 A schematic view of a double-color light ring is shown. It has two circles of LED lights inside and outside, which can display different colors and be exposed from the indicator light light-emitting hole on the periphery. Figure 13 is Figure 12An enlarged view of the top square area shows the inner LED 13023a and the outer LED 13023b, exposed to the light from the indicator light's output hole. In one implementation, the inner ring can be red, and the outer ring can be blue. Specifically, the through-holes in the edge ring area correspond to the LED rings. The LED rings are integrated on the microcontroller circuit board and are bi-color (red and blue), with each pair of red and blue LEDs forming a group. Every three groups of LEDs are located in one indicator light's output hole.

[0186] Figure 5 An implementation scheme with indicator lights around the control panel is shown. For example... Figure 5 As shown, the control panel 502 includes an indicator light 50237, which may be, for example, an LED. The indicator light 50237 is located on the side of the control panel near the transparent cover, i.e., its front side. When the indicator light is located in the area outside the main body panel, i.e., the support side area, as... Figure 5 As shown, the support side may include a second sub-support side 50122 and a third sub-support side 50123 arranged in parallel. The second sub-support side 50122 is closer to the display unit 503 than the third sub-support side 50123, and is directly connected to the main body plate 5011. A gap 5016 exists between the second sub-support side 50122 and the third sub-support side 50123. When the indicator light 5023 is working, the light emitted by the indicator light can pass through the gap 5016 to the transparent cover plate 504 and exit through the transparent cover plate 504. That is, the gap forms a light-emitting hole for the indicator light. In this cross-sectional view, the second sub-support side and the third sub-support side are separated by the gap 5016. However, the second sub-support side and the third sub-support side are connected by a connecting part in other cross-sections (such as...). Figure 8 (The fourth sub-support side shown).

[0187] Figure 9 A front view of the main body plate portion 901 with a first through hole 9014 is shown. The main body plate portion also has a central recess for accommodating the display unit, and has a gap 9016 around it for allowing the indicator light to pass through.

[0188] In addition to arranging LED lights in a ring around the control panel in the area corresponding to the support side, LED lights can also be arranged in the control panel area corresponding to certain areas of the main body panel. Figure 11 An opening in the main body panel supporting the frame is shown. Openings 11017a and 11017b are indicator light openings, i.e., indicator light emission holes, used to expose LED indicator lights located at corresponding positions on the control panel. The central rectangular area schematically illustrates the placement of a display unit. The display unit may correspondingly have a rectangular display area and may be, for example, [missing information - likely related to display unit placement]. Figure 15The filter layer can be used in cooperation with the light filter layer. In one embodiment of the present disclosure, the control panel can control the LED lamp group corresponding to the position of the opening 11017a to display numbers or time, or control the LED lamp group corresponding to the position of the opening 11017b to display working intensity, etc. by the number of lighted lamps.

[0189] In one embodiment, the transparent cover plate comprises a cover plate body and a filter layer located on the side of the cover plate body close to the display unit; the filter layer comprises a transparent region and a light-shielding region arranged around the transparent region, the transparent region being used for transmitting light emitted by the display unit;

[0190] The filter layer further comprises a semi-transmission region, which is used for transmitting light emitted by the indicator lamp when the indicator lamp is working, and presents the same or similar color as the light-shielding region when the indicator lamp is not working.

[0191] The transparent cover plate of the display module can comprise a filter layer or filter sheet, which has a light-shielding region shielding the non-light-emitting region and a transparent region exposing the display region of the display unit. As shown in Figure 1 The filter layer can be a coating layer directly formed on the surface of the cover plate body, or a separate filter sheet. The filter sheet has a light-shielding region, which can be formed by black ink, shielding the region that does not need to emit light, so as to make the product beautiful. The corresponding display unit is a transparent region. Figure 14 An embodiment of the filter layer is shown, which has a light-shielding region 14041a and a transparent region 14041c. The transparent region can be a hollow region without material. Figure 14 The filter layer shown can be an annular filter sheet. Figure 15 Another embodiment of the filter layer is shown, which has a light-shielding region 15041a and a transparent region 15041c. It can be used in cooperation with the supporting frame as shown in Figure 11

[0192] In one embodiment, the filter layer can further comprise a semi-transmission region, which is used for transmitting light emitted by the indicator lamp when the indicator lamp is working and scattering the light of the indicator lamp to display uniformly, and presents the same or similar color as the light-shielding region when the indicator lamp is not working. The semi-transmission region is different from the completely transparent transparent region in that it can have color itself and can scatter the light passing through it, making it look more uniform and soft. The semi-transmission region can be a light scattering region. The semi-transmission region can be formed by covering a layer of black translucent film on the surface of white diffusion ink. Figure 14 The semi-transmission region 14041b is shown, Figure 15 The semi-transmission region 15041b is shown. Figure 5 ​The light shielding area 5041a, the semi-transmissive area 5041b, and the transparent area 5041c of the light filter layer are shown. The transparent area is used for display unit light emission, and the semi-transmissive area is used for indicator light emission. Figure 8 In this embodiment, the light filter layer also has light shielding area 8041a, semi-transmissive area 8041b, and transparent area 8041c of the same form.

[0193] When assembled in the display module, the semi-transmissive area presents the same or similar color as the light shielding area when the indicator light is not working. Similar color means that the user cannot distinguish the color at normal use distance. In one embodiment, when viewed at normal use distance, the semi-transmissive area and the adjacent light shielding area are both substantially black in color, and appear to be integrated. Thus, a full black screen can be displayed, and a black mirror state can be presented, which is more beautiful. When the display module is working, the central area display unit normally displays the startup screen and working interface, and the indicator light area is lit according to the working condition.

[0194] Figure 16 The appearance of the display module when not working (left) and when working (right) in one embodiment is shown. It can be seen that when not working, it displays a pure black appearance, and when working, the display of the display unit can be viewed from the transparent area and the lighting of the indicator light can be observed from the semi-transmissive area. The black appearance of the semi-transmissive area when not working can be achieved by selecting a gray light scattering film and stacking it with a gray cover plate body. The gray cover plate body can be gray glass.

[0195] In one embodiment, the support side includes a plurality of fourth sub-support sides, the fourth sub-support sides connecting the second sub-support sides and the third sub-support sides;

[0196] The fourth sub-support sides extend in a direction parallel to the extension plane of the control plate;

[0197] The fourth sub-support sides are arranged close to the control plate.

[0198] The aforementioned third sub-support side and the second sub-support side need to have a connecting part so that the third sub-support side can be indirectly connected to the main plate part. The connecting part is arranged at a position where light emission of the indicator light is not required to pass through, for example, it can be arranged between the aforementioned gaps. Alternatively, this connecting part can be a fourth sub-support side that also provides auxiliary support for the control plate.

[0199] The fourth sub-support side serves to connect the second and third sub-support sides and support the control plate. As Figure 8As shown, the second sub-supporting side edge 80122 and the third sub-supporting side edge 80123 are connected by a fourth sub-supporting side edge 80124. The fourth sub-supporting side edge 80124 extends along a direction parallel to the extension plane of the control panel 802 and is arranged close to the control panel 802, which can assist in supporting the control panel 802 around the display module. Figure 8 As shown, the fourth sub-supporting side edge is arranged at a position where the control panel has no indicator light, which will not affect the light emission of the indicator light and can effectively support the control panel.

[0200] Specifically, the fourth sub-supporting side edge and the second and third sub-supporting side edges can be formed in one process.

[0201] Specifically, the fourth sub-supporting side edge and the first, second and third sub-supporting side edges can be formed in one process.

[0202] The control panel of the present disclosure can not be completely attached to the main panel part of the supporting middle frame directly due to the presence of the sub-supporting side edge and / or the supporting part of the fixed supporting column, but there is a gap. The gap between the main panel part can be beneficial for the uniform heat dissipation and / or shock resistance of the control panel.

[0203] The structure of the display module of the present disclosure uses the fixed part on the side of the supporting middle frame away from the display unit, especially the supporting fixed column, instead of the conventional screw fixing. This not only helps the shock resistance, sealing and other properties of the display module, but also provides great flexibility for the wiring of small-size display modules.

[0204] The control panel in the display module is arranged with various electronic elements, each of which realizes different functions. The control panel is provided with a plurality of functional units, power supply components for powering these functional units and a processor for controlling these functional modules.

[0205] Figure 23 A functional block diagram of an embodiment of the present disclosure is shown. The display module has a display unit, a wireless communication module, a storage unit such as a USB and a flash memory, an audio unit (e.g. including an audio amplifier and a speaker connector connected thereto), a touch control unit, an LED indicator light unit (e.g. including an LED single-chip microcomputer and an LED lamp connected thereto). The display module has a processing unit for controlling the above-mentioned modules. The display module also has power supply components for powering each unit.

[0206] In the figure, the processing unit can communicate with or control these functional units, while the power input connector and the Buck step-down conversion circuit can provide the required operating voltage for each functional unit.

[0207] Specifically, the power input connector connects an external power supply, thereby providing power for the entire display module. It can directly provide power for the processing unit, USB, LED single-chip microcomputer, wireless communication module, etc., such as providing a voltage of 5V. It can also output a lower voltage through a transformer device such as a BUCK step-down conversion circuit, for example, it can provide a voltage of 2.8V for the display unit, or provide voltages of 1.1V, 1.8V, 3.3V, etc. for the devices in the processing unit. The processing unit can communicate and exchange data with the units such as USB, flash memory, Wifi, Bluetooth, touch unit, etc. The processing unit can control the display unit, and an example can be a 2.1-inch LCD display screen. The processing unit can also control the LED single-chip microcomputer, thereby controlling the LED lamp. The processing unit can have an audio processor, which is connected to an audio amplifier, which is further connected to a speaker connector, for providing sound signals to the speaker of the external device. The processing unit can be controlled by the touch unit. It should be understood that Figure 23 The functional block diagram is only illustrative to explain the general working principle of the display module, and does not limit the functions of the display module of the present disclosure.

[0208] Other functional modules can also be included in the display module of the present disclosure, such as temperature sensing module, humidity sensing module, acceleration sensing module, gravity sensing module, gas detection module, geographic position positioning module, etc. They can all be controlled or accessed by the processing unit, and powered by the power supply components.

[0209] The present disclosure also provides a design scheme of the position of the wiring and the positioning hole / support fixing column in the display module.

[0210] In one embodiment, the control board includes a second through hole, the flexible circuit board penetrates through the second through hole, and is connected to the side of the control board away from the main body plate part;

[0211] The control board includes a control board main body, and a flexible circuit board connector arranged on the side of the control board main body away from the main body plate part, the flexible circuit board connector is arranged adjacent to the second through hole, and the flexible circuit board connector includes a flexible circuit board connecting end;

[0212] The second through hole is a strip-shaped through hole, and the extension direction of the flexible circuit board connecting end is the same as the extension direction of the second through hole;

[0213] The second through hole is located at the edge of the control board, and the flexible circuit board connector is closer to the center of the control board than the second through hole.

[0214] The flexible circuit board connector as a component of the control board can be located on the back of the control board, i.e. on the side away from the main body plate portion, for connecting the flexible circuit board. It can have a flexible circuit board connection end, such as a gold finger, which allows the flexible circuit board port to be plugged into the flexible circuit board. The second through hole can be a strip-shaped through hole to allow the flat flexible circuit board to pass through. The extension direction of the flexible circuit board connection end is the same as the extension direction of the second through hole, i.e. they are parallel. In this way, the flexible circuit board can be plugged into the flexible circuit board connector without twisting after passing through the second through hole. The flexible circuit board connector is a relatively large device, which can be arranged close to the center of the control board. In comparison, the through hole can be farther away from the center. This wiring arrangement is conducive to the plugging installation of the flexible circuit board, and also avoids large bending of the flexible circuit board.

[0215] Figure 22 A wiring arrangement diagram of the control board main body on the side away from the main body plate portion, i.e. on the back of the control board, is shown. The second strip-shaped through hole 22a and the flexible circuit board connector 22b are shown, which are arranged adjacent to each other and have the same extension direction. The flexible circuit board connector 22b is closer to the center of the control board. The flexible circuit board 22e can be connected to the flexible circuit board connector connection end (gray area) on the upper edge of the flexible circuit board connector after passing through the second strip-shaped through hole 22a.

[0216] The flexible circuit board passes through the second through hole and directly exits the line, and the flexible circuit board connector is located below the exit line. The flexible circuit board needs to avoid dead folding as much as possible. There should be no components below the flexible circuit board exit line to avoid short circuit caused by piercing. Therefore, it is appropriate for the flexible circuit board connector to be located 4 mm ± 0.5 mm below the second through hole.

[0217] In one embodiment, the control board main body includes a first positioning hole between the second through hole and the first edge of the control board main body; the center of the first positioning hole is located in the middle 1 / 3 of the overall length of the hole along on the side of the second through hole close to the first positioning hole.

[0218] In a specific embodiment, the fixing portion includes a first sub-fixing portion, which cooperates with the first positioning hole to fix.

[0219] The first positioning hole can be close to the first edge of the control board main body. The first edge is the edge closest to the second through hole, such as the upper edge above the second through hole as shown in Figure 22 The first positioning hole is preferably located close to the center line of the main body plate portion, which increases the load bearing capacity of the position near the flexible circuit board connector, especially the reliability in high-vibration use environment. Figure 22The first positioning hole is shown in the middle, the center of which is in the middle 1 / 3 of the length of the hole along the second through hole, which is located on the side of the first positioning hole, as shown by the position between the two dashed lines.

[0220] In one embodiment, the control board comprises a touch unit connector arranged on the side of the control board body away from the main body plate;

[0221] When a circle is drawn on the surface where the touch unit connector is located with the center of the control board body as the origin, and the area of the circle covers 1 / 9 of the area of the control board, the center of the orthographic projection of the control board body on the touch unit connector is located in the circle.

[0222] The touch unit connector cannot be too close to the edge, otherwise it is not conducive to the insertion of the touch unit connection line. In addition, being arranged in the center is also more convenient to obtain effective support of the fixed support column, and the center is preferably arranged in the above-mentioned reference circle. Figure 22 In the middle, the touch unit connector 22c is located in the reference circle drawn by the dashed line. Further preferably, the center of the control board body is located in the orthographic projection of the touch unit connector on the control board body. In this way, the touch unit connector not only has its center close to the center of the control board body, but also occupies the center of the control board body itself, and the structure is more stable.

[0223] In one embodiment, the touch unit connector comprises a touch unit connection end, which is arranged to extend in a direction away from the flexible circuit board connector.

[0224] Figure 22 The touch unit connection end at the lower end of the touch unit connector is shown in the middle, which is shown in gray. The touch connection line connected to the touch unit connector will extend downward, away from the flexible circuit board connector above, to avoid spatial conflict or interference with it.

[0225] The touch unit connection line, the touch unit connector, the flexible circuit board connector, the flexible circuit board, and the second through hole are all substantially on the middle line of the longitudinal direction of the display module, the touch unit connector is in the central 1 / 3 width area, the touch unit connection line extends from the touch unit connector to the downward area, the flexible circuit board connector is in the area above the touch unit connector, and the second through hole is at a distance of 4mm±0.5mm above the flexible circuit board connector.

[0226] In one embodiment, the display module comprises a touch unit, which is connected to the touch unit connection end through the touch unit connection line;

[0227] The control plate body comprises a second positioning hole arranged adjacent to the second edge of the control plate, the second edge being located on the opposite side of the first edge;

[0228] The second positioning hole is arranged adjacent to the touch unit connecting line;

[0229] The orthographic projection of the touch unit connecting line on the control plate does not overlap the second positioning hole;

[0230] The fixing portion comprises a second sub-fixing portion, which cooperates with the second positioning hole to fix.

[0231] As shown in Figure 22 The upper end of the touch unit connecting line 22d is inserted into the connecting end of the touch unit connector, and the lower end is connected to the touch unit 22f.

[0232] The touch unit connecting line is located on the center line of the display module and below the display unit, which is convenient for the user to operate the proximal touch unit. The touch unit is a component suitable for single-handed operation by the user, and should be ergonomic, convenient to operate and aesthetically pleasing. When the touch unit is located directly below the center line of the display unit, it is both aesthetically pleasing and convenient for the user to operate proximally while viewing the display image on the display unit. As mentioned above, the touch unit connector is also located on the longitudinal center line of the display module. When installing, the touch unit connecting line needs to be inserted into the touch unit connector. Since the male end of the wire insertion interface is a hard interface, and the outer edge of the support frame usually has a retaining wall, it is necessary to reserve 2 times the length of the male end in the wire insertion direction to ensure that the wire insertion is not hindered. Therefore, the touch unit connector is preferably located within the central 1 / 3 width region. The touch unit connecting line and the flexible circuit board assembly should be located in the opposite direction of the touch unit connector. That is, when the touch unit connecting line extends downward, the flexible circuit board through hole and the flexible circuit board connector should be arranged above the touch unit connector. The reasons are as follows: the flexible circuit board is a major heat generating device and should not overlap other lines; the touch unit connecting line is a soft line and should avoid overlapping with hard devices such as the flexible circuit board connector; in addition, the crossing and overlapping of various lines can also cause signal interference.

[0233] Specifically, the touch unit connecting line is generally made of PET sheet, which is different from the power supply wire material. The power supply wire material is usually copper wire wrapped with an insulating layer, and the insulating layer material is PVC (polyvinyl chloride), which has good resistance to bending, twisting or scratching. However, the touch unit connecting line is easily pierced above the bump, causing abnormality of the line. Therefore, the fixing portion near the touch unit connecting line should avoid the wire routing position. Therefore, the positioning hole position near the second edge (lower edge in Figure 22 ) of the control plate opposite the first edge can be designed to be not centrally symmetric with respect to the center of the control plate to the first positioning hole near the first edge.

[0234] As Figure 22 As shown in FIG. 2, the second positioning hole and the normal projection of the touch unit connecting line on the control panel do not overlap.

[0235] In one embodiment, the control panel comprises a power input connector arranged on the side of the control panel body away from the main panel part;

[0236] The power input connector is arranged on the side of the normal projection of the axis of the touch unit connecting line on the surface of the control panel body.

[0237] The power input connector comprises a power input connecting end arranged to extend the power connecting line towards the edge of the control panel body, and the extending direction is at an angle other than 0° and 180° with the extending direction of the touch unit connecting line.

[0238] As described above, connectors other than the flexible circuit board connector and the touch unit connector, such as the power input connector, are adapted to be transversely plugged in to avoid interference with the flexible circuit board and the touch unit connecting line. The power input connector is used to connect the power of the external device to supply power to the display module. Basically, as long as the power input connecting end of the power input connector makes the extending direction of the power connecting line different from the extending direction of the touch unit connecting line, i.e. at an angle other than 0° and 180°, the power input connector is acceptable. Preferably, the extending direction of the power connecting line is perpendicular to the extending direction of the touch unit connecting line. The power input connector is arranged on the side of the normal projection of the axis of the touch unit connecting line on the surface of the control panel body, i.e. it does not overlap with the normal projection of the touch unit connecting line on the surface of the control panel body.

[0239] As Figure 22 As shown in FIG. 2, the power input connector 22g is located on the left side, and the power input connecting end shown in gray on the left side thereof is substantially perpendicular to the extending direction of the touch unit connecting line after connecting the power connecting line.

[0240] The control panel can also be provided with a signal interaction connector for transmitting signals between the display module control panel and the whole machine control panel. The signal interaction connector can be integrally arranged with the power input connector or arranged side by side, and the signal interaction connecting line can be arranged in parallel with the power input connecting line.

[0241] In one embodiment, the control panel comprises a power input connector arranged on the side of the control panel body away from the main panel part;

[0242] The horn connector is located on the side of the control panel body surface which is different from the power input connector, and the axis of the touch unit connecting line is divided on the orthogonal projection of the control panel body surface.

[0243] The horn connector comprises a horn connecting end, which is arranged to extend the horn connecting line to the edge direction of the control panel body, and the extending direction is an angle other than 0° and 180° with the extending direction of the touch unit connecting line.

[0244] The horn connector is used to connect an external horn or loudspeaker, so that the control panel can provide sound prompts for the user through the display module. The arrangement rule followed by the horn connector is similar to that of the power input connector. However, since both the horn connector and the power input connector are relatively large elements, it is preferred that they are located on different sides.

[0245] Figure 22 In this embodiment, the horn connector 22h is located on the side opposite to the power connector 22g, i.e., the right side. Similarly, the horn connecting end shown in gray is arranged to extend the horn connecting line to the edge direction of the control panel body, and the extending direction is substantially perpendicular to the extending direction of the touch unit connecting line. The orthogonal projection of the horn connector and the touch unit connecting line on the control panel body surface also does not overlap.

[0246] The power connector and the horn connector can be respectively on the two sides of the center line, and the horizontal distance from the touch unit connecting line is between 0.5 mm and 5 mm. They can be as close to the center as possible, for example, the distance is less than 5 mm. However, considering the feasible minimum distance of the pin closest to the touch unit connecting line under the requirement of the swing element space, a distance of at least 0.5 mm needs to be left.

[0247] In one embodiment, the power input connecting end and the horn connecting end are arranged to extend the power input connecting line and the horn connecting line in opposite directions;

[0248] The power input connecting end is arranged to extend the power input connecting line in a direction perpendicular to the extending direction of the touch unit connecting line.

[0249] This arrangement of the elements minimizes the interference between each other, facilitates the plugging and unplugging of various connecting lines, and is suitable for the assembly of a stable and shock-resistant display module in cooperation with the design of the positioning holes and the fixing support columns of the present disclosure.

[0250] Figure 22 The arrangement of extending the power input connecting line and the horn connecting line in opposite directions and both perpendicular to the extending direction of the touch unit connecting line is shown.

[0251] Without relying on any theory, the inventors discovered that other connectors, such as power input connectors and speaker connectors, are suitable for lateral wiring. Due to the presence of the frame wall in the module's shape, for small modules with a maximum diameter of less than 100mm, the wiring direction needs to allow for as much space as possible for wiring travel to facilitate production. If the socket is offset by more than 1 / 3 from the center to the edge, it may be difficult for operators with larger hands to reach in. To ensure smooth and unobstructed wiring, with the flexible circuit board and touch unit connector already clearly positioned, the optimal connector placement is to center the left and right sides of the touch unit connection cable and touch unit connector as much as possible. This provides the most sufficient wiring travel space, and ensures that the flexible circuit board, touch unit connection cable, power input, and speaker connector do not cross or interfere with each other.

[0252] like Figure 10 As shown in the left figure, the power input connector 10g and the speaker connector 10h are located on the left and right sides of the center line, respectively, with the wiring openings facing outwards to the left and right. Their horizontal distance from the touch unit connection line 10d is less than 5mm. A Wi-Fi and / or Bluetooth device 10i may also be located on the side of the touch unit connection line. Other areas of the control board may also include, for example, a microcontroller unit (MCU) 10j, a touch control processor 10k, etc. The MCU may be located, for example, between the speaker connector and the flexible circuit board connector. The touch control processor may be located, for example, between the power connector and the flexible circuit board connector.

[0253] In one embodiment, the control board body further includes a third positioning hole, which is located between the flexible circuit board connector and the touch unit connector;

[0254] The third positioning hole does not intersect with the line connecting the center of the orthographic projection of the touch unit connector on the control board body and the center of the orthographic projection of the flexible circuit board on the control board body.

[0255] The fixing part includes a third sub-fixing part, which is fixed in conjunction with the third positioning hole.

[0256] The third positioning hole provides support in the center of the control board body. Located between the flexible circuit board connector and the touch unit connector, it supports both connectors simultaneously. It does not intersect with the line connecting the centers of the two connectors; that is, it is not on that line, but rather on one side. This is because the first positioning hole is preferably already located at the edge of the center line. Figure 22 In the middle, the third positioning hole ③ is not located on the center line. The first positioning hole is already on the center line. Therefore, the third positioning hole can be further away from the straight line connecting the first positioning hole, thereby providing more evenly distributed support in the middle of the control board body.

[0257] In one embodiment, the control board includes a processing unit disposed on the side of the control board body away from the main body plate portion.

[0258] That is, the control board may also include a processing unit located on its back. The processing unit may be a processor. It does not require external wiring, therefore has no connection terminals for external wiring, and can be arranged in any location that does not conflict with or interfere with the aforementioned components and wiring.

[0259] In one embodiment, the control board further includes one or more of the following: a Wi-Fi module, a Bluetooth module, a temperature sensing module, a humidity sensing module, an acceleration sensing module, a gravity sensing module, a gas detection module, and a geolocation module. These modules can all be located on the side of the control board body away from the main body, providing more functionality for the display module.

[0260] In one embodiment, the control panel body includes a fourth positioning hole and a fifth positioning hole, both of which are located near the edge of the control panel body; wherein, the fourth positioning hole is located on the line connecting the first positioning hole and the second positioning hole along the edge of the control panel body in a clockwise direction; and the fifth positioning hole is located on the line connecting the first positioning hole and the second positioning hole along the edge of the control panel body in a counterclockwise direction.

[0261] The fourth and fifth positioning holes are configured such that when the first, second, fourth, and fifth positioning holes are connected to the center of the control board, the included angle formed by any two connecting lines is greater than or equal to 45 degrees.

[0262] The fixing part includes a fourth sub-fixing part, which is fixed in conjunction with the fourth positioning hole; the fixing part also includes a fifth sub-fixing part, which is fixed in conjunction with the fifth positioning hole.

[0263] After setting two first and second positioning holes near the edge and a third positioning hole near the center, more positioning holes can be added in the still relatively weak areas, and correspondingly, more fixing parts can be added to enhance stability.

[0264] like Figure 22 As shown, fourth and fifth positioning holes can be added to the clockwise and counterclockwise edges between the first and second positioning holes, respectively, and they all maintain a sufficiently large circumferential angle with the first and second positioning holes, thereby more effectively reinforcing the weak parts. Specifically, they are located at positions beyond a circumferential angle of 45° from the first and second positioning holes in the clockwise and counterclockwise directions. Figure 22The radial dashed lines on both sides of the first and second positioning holes indicate the range of their respective 45° circumferential angles, and the fourth and fifth positioning holes ④ and ⑤ are located outside this range. Therefore, the fourth and fifth positioning holes are configured such that when the first, second, fourth, and fifth positioning holes are connected to the center of the control board, the included angle formed by any two connecting lines is greater than or equal to 45 degrees.

[0265] In this way, four positioning holes are evenly distributed along the edge of the control panel, ensuring that there are no obvious weak points.

[0266] In one embodiment, the control board body includes a sixth positioning hole, which and the third positioning hole are located on opposite sides of the line connecting the center of the orthographic projection of the touch unit connector on the control board body and the center of the orthographic projection of the flexible circuit board on the control board body.

[0267] The minimum distance between the sixth positioning hole and the edge of the control board body is greater than the minimum distance between any one of the first, second, fourth, and fifth positioning holes and the edge of the control board body.

[0268] The fixing part includes a sixth sub-fixing part, which is fixed in conjunction with the sixth positioning hole.

[0269] The sixth positioning hole also serves as a support for the center of the control panel body. Therefore, compared to the first, second, fourth, and fifth positioning holes, it is further away from the edge, i.e., closer to the center. Furthermore, it and the third positioning hole are located on opposite sides of the centerline, thus providing more evenly distributed support for the center of the control panel body.

[0270] In one embodiment, the control panel body includes a fourth, fifth, and sixth positioning hole, wherein the first, third, and third positioning holes are axially symmetrical with respect to an axis passing through the center of the control panel body, respectively.

[0271] The fixing part includes a fourth sub-fixing part, which is fixed in conjunction with the fourth positioning hole; the fixing part includes a fifth sub-fixing part, which is fixed in conjunction with the fifth positioning hole; the fixing part includes a sixth sub-fixing part, which is fixed in conjunction with the sixth positioning hole.

[0272] As mentioned above, after the positions of the first, second and third positioning holes are determined, an axis of symmetry passing through the center of the control board body can be set, and the fourth, fifth and sixth positioning holes can be determined according to the axis of symmetry. The axis can be a straight line that forms a 45° angle with the straight line passing through the center of the control board body and the first positioning hole, or it can be a straight line that forms other angles. The actual symmetrical position can have some errors, for example, compared with the ideal symmetrical position, there can be deviations in the radial direction and the circumferential direction relative to the center of the control board body, for example, deviations of less than 20%, more preferably less than 10%.

[0273] This way of arranging the wiring and positioning holes of the cloth is particularly advantageous. Arranging the first to sixth positioning holes in the above-mentioned way does not affect the wiring of the cloth, can provide sufficient support for the control board at the edge and in the center at the same time, and is helpful to reinforce various connectors and sockets.

[0274] Figure 10 The schematic diagram of the back and front positioning hole arrangement of the control board according to one embodiment of the present disclosure is shown. The control board has a substantially octagonal outer edge, and the shaded area of the periphery represents the part in contact with the surrounding support framework supporting the middle frame. No positioning holes are provided in this part.

[0275] The second through hole 10a, the flexible circuit board connector 10b, the touch unit connector 10c, the touch unit connecting line 10d and the flexible circuit board 10e are all on the midline of the longitudinal direction of the display module. The touch unit connector 10c is in the central 1 / 3 width area, which is shown as in the exact center in the figure. The touch unit connecting line 10d extends from the touch unit connector 10c to the downward area. The flexible circuit board connector 10b is in the area above the touch unit connector, and the second through hole 10a is above the flexible circuit board connector 10b, for example, 4mm±0.5mm away from it.

[0276] A first positioning hole ① is provided above the first through hole 1005, more preferably on the center line, serving as a fixed support position for the upper edge. A second positioning hole ② is provided below the touch unit connector 10c and outside the range of the touch unit connecting line 10d. From the principle of central symmetry design, the second positioning hole on the lower edge should be located at the center symmetrical position of the first positioning hole, i.e., at the lower end of the center line. However, since the touch unit connecting line is a flexible flat cable without rubber sleeve, if a positioning hole is provided along the extension path of the touch unit connecting line, a protruding fixed head will be formed on the side of the control board away from the main board (i.e., the side facing the touch unit connecting line), which will affect the touch unit connecting line and thus the touch stability. Therefore, the positioning hole design needs to avoid the touch unit connecting line, and the positioning point ② is selected on the left or right side of the board edge next to the touch unit connecting line. In the figure, the positioning point ② is selected on the left. In addition, a third positioning hole ③ is provided between the flexible circuit board connector 10b and the touch unit connector 10c as a central positioning hole. Here, the second positioning hole ② and the third positioning hole ③ are located on the same side of the center line, which is the left side in the figure. The other three positioning holes on the same side can be easily set by the following 45° angled diagonal line, and as described below, stable support can be provided for other connectors set on both sides, such as power input connector 10g and speaker connector 10h.

[0277] For example, such as Figure 10 As shown, with the line from the lower left to the upper right at a 45° angle to the lower direction of the center line as the axis of symmetry (dashed line in the figure), fourth, fifth, and sixth positioning holes ④, ⑤, and ⑥ are set with symmetrical positions to the first, second, and third positioning holes, respectively.

[0278] Figure 10 The right image shows the front of the control panel.

[0279] Thus, the first positioning hole primarily secures the upper edge, the second positioning hole primarily secures the lower edge, and the fourth and fifth positioning holes correspondingly secure the right and left edges. The third and sixth positioning holes are used for securing the central portion. This aligns with the design concept of this disclosure, which includes 3-4 support columns arranged in the peripheral area of ​​the main body panel and 1-2 columns arranged in the central area of ​​the main body panel.

[0280] Such a six-point positioning hole arrangement is particularly suitable for the aforementioned device layout with the flexible circuit board connector and touch unit connector located at the center line and the power input connector and speaker connector and Wifi connector located at the two sides. The power input connector located at the left side is supported by the second, third and fifth positioning hole points; the speaker connector located at the right side is supported by the fourth and sixth positioning hole points. They, as well as the flexible circuit board connector and touch unit connector, are all supported by at least two positioning hole points, increasing the stability. In the vicinity of, for example, the Wifi device, there is also at least one positioning hole point providing support. The third positioning hole is located in the upper middle area on the left, providing support in the middle of the flexible circuit board connector, power input connector and touch unit connector. The sixth positioning hole is located in the lower middle area on the right, providing support between the touch unit connection line, speaker connector and Wifi. Preferably, the third positioning hole is selected to be on the same side of the center line as the larger power input connector, to provide stronger support.

[0281] In one embodiment, the control board is shaped as one of a circle, an ellipse, or an N-sided polygon, where N is greater than or equal to 4. Such a control board is suitable for display modules of regular shape, is aesthetically pleasing, and is symmetrical, facilitating the design and processing of the layout of the components. More preferably, an octagonal shape can be used. At the same circumscribed circle diameter, it is easier to process than a circular, elliptical or more-sided polygonal control board, and provides more area for components than a quadrilateral or hexagonal control board.

[0282] In order to facilitate the installation of the control board in cooperation with the back of the supporting middle frame, the supporting side of the main plate part can have a limiting inner edge corresponding to the shape of the control board. For example, for the above-mentioned octagonal control board, the limiting inner edge can be designed to be substantially octagonal.

[0283] In one embodiment, the maximum length of a line segment extending from the center point of the control board to the surface of the control board is less than or equal to 20 cm.

[0284] For example, if the control board is circular, the radius of the control board can be less than or equal to 100 mm. In particular, the fixing method and component layout method of the present disclosure are particularly suitable for small-sized display modules.

[0285] In one embodiment, 3-4 of the support fixing columns are arranged in the peripheral region of the main plate part, at a distance of less than 1 / 4 of the plate width from the edge of the main plate part, and 1-2 of the support fixing columns are arranged in the central region of the main plate part, at a distance of less than 1 / 4 of the plate width from the centroid of the main plate part. The positioning holes are arranged in the corresponding positions of the control plate. The plate width is the distance between the edges of the plate through the centroid and a straight line through the support fixing columns. For example, for a circular plate, the plate width is its diameter. In other words, near the edge, 3-4 support fixing points can ensure uniformity and stability of the whole. More preferably, 4 support fixing points near the edge ensure stable support. Near the center and the centroid, the addition of 1-2 support fixing points prevents the control plate from being suspended in a large area, avoiding rapid deformation of the local unfixed area under high temperature and high intensity vibration. The simultaneous arrangement of support fixing points near the edge and the center can make them evenly distributed on the entire control plate, so that the stress is evenly distributed. In one embodiment, at least one positioning hole is arranged within a distance of 5-10 mm from any connector or external plug-in interface in the control plate. That is, positioning holes are arranged near these devices with interfaces, so that they are stabilized by the support fixing columns accordingly. Generally, during installation and subsequent use, connectors and external plug-in interfaces need to be operated with pluggable wires. When positioning holes are arranged near them, the corresponding support fixing columns can resist damage to the interfaces caused by local stress due to operations such as plugging and unplugging wires, pressing the piano cover, etc. Within the above-mentioned preferred distance range, the connectors or interfaces are stably supported without affecting their installation and wiring.

[0286] In one embodiment, the display unit has one of a circular shape, an elliptical shape, or an N-sided polygonal shape, where N is greater than or equal to 4.

[0287] Similar to the control panel, the display unit can also have the above-mentioned preferred shape to facilitate processing, installation, and full use of space.

[0288] In one embodiment, the front surface of the support middle frame is made of replaceable mold inserts. The insert is a part of the mold that can be removed and replaced to produce different shapes according to different product requirements. In this way, support middle frames with the same edge shape can be used to embed display units of different shapes. For example, a universal circular or rectangular support middle frame can be made, and the front surface is made of different inserts to obtain different display unit embedding parts, so that display units of different sizes and shapes can be replaced.

[0289] The display module of the present disclosure will be installed on an entire electronic device in use. In one embodiment, the edge of the support middle frame has a buckle. As shown in Figure 2As shown, the buckles 2015 can easily fasten the back of the support middle frame to the whole electronic device. In another embodiment, the back of the display module can be pasted to the whole device by applying back adhesive on the retaining wall of the support middle frame. Compared with pasting, the buckle has the advantage of facilitating quick installation.

[0290] The position of the buckle can be further protruding from the support side and distributed around the periphery of the support middle frame. In one embodiment, the buckle can be further protruding from the first sub-support side. In some embodiments, the buckle and the first sub-support side are an integral structure. The number of buckles can be selected according to the specific fastening conditions with the whole device. Preferably, 2-6, more preferably 4. Preferably, 4 buckles evenly distributed on the circumference can provide a more secure combination with the whole device and are not easy to fall off.

[0291] In one embodiment, the edge of the support middle frame is pasted with foam adhesive. The foam adhesive can play a role in shock absorption, so that the vibration transmitted from the whole device is attenuated, thereby further increasing the reliability of the display module. Buckles can also not be used, and the display module can be pasted to the whole device simply by using foam adhesive. Back adhesive can also be applied to the most protruding part of the back of the display module (such as the support side) to paste the display module to the whole device.

[0292] In one embodiment, the display unit is a liquid crystal display module (LCM). Other types of display units can also be selected.

[0293] In one embodiment, the outer size of the display module is a circle with a diameter of less than 200 mm, more preferably a circle with a diameter of less than 100 mm, and more preferably a circle with a diameter of less than 90 mm. Such a small size display module is particularly suitable for using the embodiments of the present disclosure.

[0294] The present disclosure also provides a method for manufacturing the above-mentioned display module, wherein the control board is assembled to the support middle frame by the following steps:

[0295] A support middle frame that is not hot-pressed is provided, wherein the support part of the support fixed column has a hot-melt plastic rod, and the height of the hot-melt plastic rod is greater than the positioning hole;

[0296] The hot-melt plastic rod is passed through the positioning hole, and one side of the control board contacts the support part;

[0297] The part of the hot-melt plastic rod protruding out of the positioning hole is heated and pressed using a hot-melt pressing head, so that it is deformed into the fixed head part and contacts the side of the control board away from the main body plate part;

[0298] The fixed head part is allowed to cool and solidify.

[0299] Figure 17 andFigure 18 The hot pressing step is schematically shown. The hot melt device forms a fixed head 180132b by hot pressing the hot melt plastic rod 170133. Specifically, the hot melt plastic rod 170133 passes through the positioning hole on the control plate 1702, is placed in the hot melt pressing device, the jig is fixed, and it is ensured that the components are covered and protected by the jig, and only the positioning column hole area is exposed. The hot melt plastic rod is designed to have a minimum diameter of 1.2 mm which can be made by a conventional plastic non-high-precision mold, and the height is set to be 1 mm higher than the back of the control plate. The customized hot melt pressing head 1710 corresponds to the hot melt plastic rod, and the hot melt pressing head is slightly larger than the hot melt plastic rod, i.e., about 2 mm. By driving with a servo motor, the hot pressing position accuracy can reach ±0.01 mm. The hot melt plastic rod is moved by controlling multiple hot pressing heads, and the material at the top of the plastic positioning column is melted and compressed at high temperature, and finally a fixed head 180132b in the form of a "round cake" with a diameter of about 2 mm is formed, which is tightly pressed against the control plate. In cooperation with the support part supporting the fixed column below the control plate, it is ensured that the control plate will not be deformed in the vertical direction. Figure 18

[0300] The height difference between the hot melt plastic rod and the positioning hole can be appropriately selected so that a fixed head that is sufficient to cover the positioning hole but not too large and thick can be formed after hot melting.

[0301] The hot melting and pressing method of the present application can conveniently fix the control plate to the main plate part of the support middle frame.

[0302] The display module of the present disclosure can be used to be mounted to an electronic device. In one embodiment, the present disclosure provides an electronic device comprising the display module. As described above, the display module can be mounted to the whole machine by buckling or pasting.

[0303] In a preferred embodiment, the electronic device is a household appliance comprising a motor. The household appliance comprising a motor is in a high-temperature and strong-vibration condition when working. The display module of the present disclosure can effectively reduce damage and failure under such conditions.

[0304] In a more preferred embodiment, the household appliance comprising a motor is a household cleaning appliance. In a more preferred embodiment, the household cleaning appliance is, for example, a handheld vacuum cleaner. The touch slide strip in some embodiments of the present disclosure is particularly suitable for one-handed operation during use of the household cleaning appliance.

[0305] Embodiment

[0306] According to the structure of the present disclosure, the display module is assembled. The parameters in the preferred embodiments described above are selected for preparation. Figure 1 The display module assembly steps are as follows:

[0307]

[0308] ​​1) Double-sided foam tape is pasted on the back of the display module 103 and fixed to the front of the supporting middle frame 101, wherein the FPC connected to the display module extends to the back from the FPC passing hole of the supporting middle frame.

[0309] 2) The annular filter 1041 is pasted on the front of the supporting middle frame, so that the display part of the display module is aligned with the central opening part of the filter and is not blocked, and the semi-transmission area is aligned with the annular opening of the supporting middle frame to ensure that the light of the indicator lamp is emitted and uniformly scattered.

[0310] 3) The gray glass cover plate 1042 is pasted on the front of the module filter after the black double-sided tape 1043 is pre-pasted on the periphery with a width of 3 mm.

[0311] 4) The positioning hole of the MCU board 102 is aligned and placed on the hot melt plastic rod of the supporting fixed column on the back of the module supporting middle frame, and the hot melt plastic rod passes through the positioning hole of the MCU board. The FPC extends to the back through the FPC passing hole of the MCU board.

[0312] 5) The module is placed in the hot pressing jig equipment, the hot pressing head is pressed to form a fixed head, the MCU is clamped between the fixed head and the supporting part, and is fixed to the supporting middle frame.

[0313] 6) The module is placed in the dispensing jig, and glue is applied at the gap between the edge of the MCU board and the supporting middle frame.

[0314] 7) The protective film 1044 is attached to the front of the module.

[0315] 8) The touch slide 106 is inserted into the touch unit connector on the back of the MCU board of the module, and the FPC is inserted into the FPC connector on the back of the MCU board. Among them, the MCU board adopts Figure 10 wiring mode. The MCU board is assembled with the supporting middle frame in the mode of Figure 17-18 .

[0316] Figure 19 The touch slide is schematically shown. 19m is a touch key, which can implement switching, selection and other operations. 19n is a touch slide part, which can implement adjusting operating power, light brightness, menu switching and other operations by sliding up and down with hands. Figure 20 The connection of the distal end interface of the touch unit connection line and the touch unit connector is shown. The distal end interface of the touch unit connection line is a hard male head. Therefore, the touch unit connector needs to be arranged in the central 1 / 3 area to leave at least 2 times the length of the male head for installation.

[0317] Figure 21 It is an appearance diagram of an assembled embodiment of the present disclosure.

[0318] The display module containing the touch slide bar is installed to the handheld vacuum cleaner by buckling. After testing, the display module does not fail after working, the touch slide bar is convenient to operate, and the product is small and beautiful.

[0319] The display module of the present disclosure can be a small module, has excellent high-temperature-resistant strong vibration performance, and the embodiments including the foregoing technical details also have various excellent technical effects. When used on a household cleaning appliance, interaction with the display unit and control of the cleaning gear can be achieved by sliding touch, and the product use comfort and intelligence are improved.

[0320] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display module, comprising: A supporting frame and a transparent cover plate are provided. The supporting frame includes a main body plate extending in the same direction as the transparent cover plate and a supporting side plate surrounding the main body plate. The supporting frame and the transparent cover plate form a first accommodating space. The display unit is located in the first accommodating space; A control board is located on the side of the main body away from the display unit. The control board is electrically connected to the display unit and is used to transmit display signals to the display unit. The supporting frame also includes at least one fixing part, which is located on the side of the main body plate away from the display unit and is used to fix the control board. The control board is assembled to the supporting frame through the following steps: A support frame without hot pressing is provided, wherein the fixing part is a support fixing column, and the support part of the support fixing column has a hot melt plastic rod, the height of the hot melt plastic rod being greater than the positioning hole penetrating the control plate; Pass the hot-melt plastic rod through the positioning hole so that one side of the control panel contacts the support part; The portion of the hot-melt plastic rod extending from the positioning hole is heated and pressurized using a hot-melt pressure head, causing it to deform into a fixed head and contact the side of the control plate away from the main body plate. Allow the fixed head to cool and solidify.

2. The display module of claim 1, wherein, The supporting fixing column includes a supporting part located on the side closer to the main body plate and a connecting part located on the side farther away from the main body plate; The connecting part includes a limiting part and a fixing head. One end of the limiting part is connected to the supporting part, and the other end is connected to the fixing head. The control board includes a positioning hole that passes through the control board, the limiting part passes through the positioning hole, the supporting part and the fixing head are respectively located on both sides of the control board, and cooperate with the limiting part to fix the control board.

3. The display module according to claim 2, wherein, The material of the fixing part includes a hot-melt material.

4. The display module according to claim 1, wherein, The display unit and the control board are electrically connected via a flexible circuit board. The main body plate includes a first through hole, through which the flexible circuit board passes.

5. The display module according to claim 4, wherein, The control board includes a second through hole, through which the flexible circuit board passes and is connected to the side of the control board away from the main body plate. The display module also includes sealing tape, the orthographic projection of which covers the second through hole on the extended surface of the control board.

6. The display module according to claim 1, wherein, The supporting side and the main body plate form a second receiving space, and at least a portion of the control plate is located within the second receiving space; The supporting side includes a first sub-supporting side, which surrounds the control panel and forms a side enclosure for the second accommodating space. The gap between the control panel and the side of the first sub-support is filled with sealant.

7. The display module according to claim 6, wherein, The transparent cover plate is fixed to the side of the support near the transparent cover plate; The first and second accommodating spaces together constitute a closed space.

8. The display module according to claim 1, wherein, The supporting side includes a second sub-supporting side and a third sub-supporting side arranged in parallel, wherein the second sub-supporting side is closer to the display unit than the third sub-supporting side, and the second sub-supporting side is directly connected to the main body plate. The control panel includes an indicator light located on the side of the control panel near the transparent cover plate; there is a gap between the second sub-support side and the third sub-support side, and when the indicator light is working, the light emitted by the indicator light can be directed to the transparent cover plate through the gap and then exit through the transparent cover plate.

9. The display module according to claim 8, wherein, The transparent cover plate includes a cover plate body and a light filter layer located on the side of the cover plate body closer to the display unit; the light filter layer includes a transparent area and a light-shielding area surrounding the transparent area, the transparent area being used to transmit light emitted from the display unit; The filter layer also includes a semi-transparent area, which allows light emitted by the indicator light to pass through when the indicator light is working, and presents the same or similar color to the light-shielding area when the indicator light is not working.

10. The display module according to claim 9, wherein, The supporting side includes a plurality of fourth sub-supporting sides, and the fourth sub-supporting sides connect the second sub-supporting side and the third sub-supporting side; The fourth sub-support side extends in a direction parallel to the extension plane of the control panel; The fourth sub-support is positioned close to the control panel.

11. The display module according to claim 4, wherein, The control board includes a second through hole, through which the flexible circuit board passes and is connected to the side of the control board away from the main body plate. The control board includes a control board body and a flexible circuit board connector disposed on the side of the control board body away from the main body. The flexible circuit board connector is disposed adjacent to the second through hole and includes a flexible circuit board connection end. The second through hole is a strip-shaped through hole, and the extension direction of the flexible circuit board connection end is the same as the extension direction of the second through hole; The second through hole is located at the edge of the control board, and the flexible circuit board connector is closer to the center of the control board than the second through hole.

12. The display module according to claim 11, wherein, The control board body includes a first positioning hole located between the second through hole and the first edge of the control board body; the center of the first positioning hole is projected onto the hole edge of the second through hole on the side closer to the first positioning hole and is located in the middle 1 / 3 of the overall length of the hole edge; The fixing part includes a first sub-fixing part, which is fixed in conjunction with the first positioning hole.

13. The display module according to claim 12, wherein, The control board includes a touch unit connector located on the side of the control board body away from the main body plate portion; When a circle is drawn on the surface where the touch unit connector is located with the center of the control board body as the origin, and the area of ​​the circle covers 1 / 9 of the area of ​​the control board, the center of the touch unit connector in the orthographic projection of the control board body is located inside the circle.

14. The display module according to claim 13, wherein, The touch unit connector includes a touch unit connection end, which is configured to allow the touch unit connection line to extend away from the direction of the flexible circuit board connector.

15. The display module according to claim 14, wherein, The display module includes a touch unit, which is connected to the touch unit connection terminal via a touch unit connection cable; The control panel body includes a second positioning hole disposed adjacent to the second edge of the control panel, the second edge being located on the side opposite to the first edge; The second positioning hole is disposed adjacent to the connection line of the touch unit; The orthographic projection of the touch unit connection line on the control board does not overlap with the second positioning hole; The fixing part includes a second sub-fixing part, which is fixed in conjunction with the second positioning hole.

16. The display module according to claim 15, wherein, The control board includes a power input connector located on the side of the control board body away from the main body plate portion; The power input connector is located on one side of the control board body surface, where the axis of the touch unit connection line is projected onto the main surface of the control board. The power input connector includes a power input connection end, which is configured such that the power connection line of the power input connector extends toward the edge of the control board body, and the extension direction is at an angle other than 0° and 180° with the extension direction of the touch unit connection line.

17. The display module according to claim 16, wherein, The control board includes a speaker connector located on the side of the control board body away from the main body plate portion; The speaker connector is located on the side of the control board body surface that is different from the power input connector, as the axis of the touch unit connection line is projected onto the surface of the control board body. The speaker connector includes a speaker connection end, which is configured to allow the speaker connection line to extend toward the edge of the control board body, and the extension direction is at an angle other than 0° and 180° to the extension direction of the touch unit connection line.

18. The display module according to claim 17, wherein, The power input connection terminal and the speaker connection terminal are configured such that the extension directions of the power connection line and the speaker connection line are opposite. The power input connection terminal is configured such that the extension direction of the power connection line is perpendicular to the extension direction of the touch unit connection line.

19. The display module according to any one of claims 13-18, wherein, The control board body also includes a third positioning hole, which is located between the flexible circuit board connector and the touch unit connector; The third positioning hole does not intersect with the line connecting the center of the orthographic projection of the touch unit connector on the control board body and the center of the orthographic projection of the flexible circuit board on the control board body. The fixing part includes a third sub-fixing part, which is fixed in conjunction with the third positioning hole.

20. The display module according to any one of claims 13-18, wherein, The control board includes a processing unit located on the side of the control board body away from the main body plate portion.

21. The display module according to claim 20, wherein, The control board also includes one or more of the following modules: Wi-Fi module, Bluetooth module, temperature sensing module, humidity sensing module, acceleration sensing module, gravity sensing module, gas detection module, and geolocation module.

22. The display module according to claim 15, wherein, The control panel body includes a fourth positioning hole and a fifth positioning hole, both of which are located near the edge of the control panel body; wherein, the fourth positioning hole is located on the line connecting the first positioning hole and the second positioning hole along the edge of the control panel body in a clockwise direction; and the fifth positioning hole is located on the line connecting the first positioning hole and the second positioning hole along the edge of the control panel body in a counterclockwise direction. The fourth and fifth positioning holes are configured such that when the first, second, fourth, and fifth positioning holes are connected to the center of the control board, the included angle formed by any two connecting lines is greater than or equal to 45 degrees. The fixing part includes a fourth sub-fixing part, which is fixed in conjunction with the fourth positioning hole; the fixing part also includes a fifth sub-fixing part, which is fixed in conjunction with the fifth positioning hole.

23. The display module according to claim 22, wherein, The control board body includes a third positioning hole and a sixth positioning hole. The sixth positioning hole and the third positioning hole are respectively located on both sides of the line connecting the center of the orthographic projection of the touch unit connector on the control board body and the center of the orthographic projection of the flexible circuit board on the control board body. The minimum distance between the sixth positioning hole and the edge of the control board body is greater than the minimum distance between any one of the first positioning hole, the second positioning hole, the fourth positioning hole, and the fifth positioning hole and the edge of the control board body. The fixing part includes a sixth sub-fixing part, which is fixed in conjunction with the sixth positioning hole.

24. The display module according to claim 19, wherein the control board body includes a fourth positioning hole, a fifth positioning hole, and a sixth positioning hole, and the first positioning hole, the second positioning hole, and the third positioning hole are respectively symmetrically distributed with respect to the fourth positioning hole, the fifth positioning hole, and the sixth positioning hole with respect to an axis passing through the center of the control board body; The fixing part includes a fourth sub-fixing part, which is fixed in conjunction with the fourth positioning hole; the fixing part includes a fifth sub-fixing part, which is fixed in conjunction with the fifth positioning hole; the fixing part includes a sixth sub-fixing part, which is fixed in conjunction with the sixth positioning hole.

25. The display module according to any one of claims 1-18, wherein, The control panel is shaped like a circle, an ellipse, or an N-sided polygon, where N is greater than or equal to 4.

26. The display module according to claim 25, wherein, The maximum length of the line segment cut from the center point of the control board on the extended surface of the control board is less than or equal to 20cm.

27. The display module according to any one of claims 1-18, wherein, The shape of the display unit is one of a circle, an ellipse, or an N-sided polygon, where N is greater than or equal to 4.

28. An electronic device comprising a display module according to any one of claims 1-27.

29. The electronic device according to claim 28, wherein, The electronic device is a household appliance that includes a motor.

30. The electronic device according to claim 29, wherein, The household appliance in question is a household cleaning appliance.

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