A full-screen display module with touch buttons and preparation method thereof

Abstract

The present invention discloses a full-screen display module with touch-sensitive keys and a preparation method thereof. The full-screen display module comprises a glass key layer, a first optical adhesive layer, a glass cover plate and a display module which are arranged in sequence. The glass key layer is provided with a key area, and the key area is a protruding structure away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate; the display module is provided with sensors corresponding to the key areas one by one, and when the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal. The full-screen display module realizes the connection between the glass key layer and the glass cover plate through the first optical adhesive layer, and the first optical adhesive layer has good light transmittance, and can realize full-screen display of the display module. In addition, the preparation method thereof is simple, and a good touch feeling of the key area can be realized without the need for special process treatment of the first optical adhesive layer or the glass cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screen structures, and in particular to a full-screen display module with touch-sensitive buttons and a preparation method thereof. Background Art

[0002] With the gradual development of touch screens, in addition to interacting with the host, users are more pursuing the tactile feeling when touching. Traditional touch screens can only form a capacitive circuit through the user's fingers and the circuit inside the touch screen to drive the host connected to the touch screen to perform corresponding functions. This type of touch screen can only achieve basic interaction, cannot bring a tactile experience to the user, and cannot have a strong feedback response like a real keyboard. This is not friendly to the blind or people with poor eyesight.

[0003] CN117193567B discloses a glass cover with a key function, including an upper glass substrate and a lower glass substrate that are assembled together; the upper glass substrate includes at least one key area, and a key groove is provided on the side of the key area close to the lower glass substrate, and the bottom of the key groove protrudes from the non-key area; a support component corresponding to the key area is provided on the side of the lower glass substrate close to the upper glass substrate, and the support component includes at least one support bar, and the support bar is located on the outer peripheral side of the key area; when the upper glass substrate and the lower glass substrate are assembled together, the inner side wall of the key groove and the corresponding inner side wall of the support component form a key space, and the adjacent key spaces are connected. In this technical solution, the support bar is a raised support structure. Due to the small volume of the key area, the processing technology of the support bar is relatively difficult, and the support bar will diffract the light path to cause display distortion, which has a certain impact on the display quality of the display screen, and thus affects the user's experience; at the same time, due to the poor light transmittance of the key area, the display screen can only display outside the non-key area, and cannot achieve full-screen display. Summary of the invention

[0004] The present invention aims to solve at least one of the problems in the related art to a certain extent. To this end, one of the purposes of the present invention is to provide a full-screen display module with touch-sensitive keys, in which the glass key layer and the glass cover plate are connected by a first optical adhesive layer, the first optical adhesive layer has good light transmittance and will not affect the display effect of the display module, and the structure is simple, so that the full-screen display of the display module can be achieved.

[0005] A full-screen display module with touch-sensitive keys, comprising a glass key layer, a first optical adhesive layer, a glass cover plate and a display module arranged in sequence, wherein a key area is arranged in the glass key layer, and the key area is a protruding structure away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate;

[0006] The display module is provided with sensors corresponding to the key areas one by one. When the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal.

[0007] Furthermore, the thickness of the glass keypad layer is 300-700 microns, the protrusion height of the keypad area relative to the glass keypad layer is 80-200 microns, and the thickness of the first optical adhesive layer is 100-400 microns.

[0008] Furthermore, the key area is firstly formed into a groove in the glass key layer by chemical etching, and then formed into a protrusion relative to the glass key layer by chemical strengthening.

[0009] Furthermore, the button area is a rectangle, and the four corners of the rectangular button area are arc-shaped corners.

[0010] Furthermore, the length of the key area is 10-11 mm, and the width of the key area is 7-8 mm.

[0011] Furthermore, the parameters for laminating the first optical adhesive layer, the glass key layer and the glass cover plate are as follows: the vacuum value is 30 Kpa, the vacuum time is 8 seconds, the vacuum temperature is 40 seconds, the laminating pressure is 0.4 Mpa, and the laminating time is 15 seconds.

[0012] Furthermore, the display module includes a touch screen, a liquid crystal display and a backlight module, the touch screen is bonded to the glass cover plate via a second optical adhesive layer, the touch screen is bonded to the liquid crystal display via a third optical adhesive layer, and the liquid crystal display is embedded in the backlight module.

[0013] Furthermore, the thickness of the second optical adhesive layer and the third optical adhesive layer is 45-55 microns.

[0014] Furthermore, the touch screen is provided with sensors corresponding to the key areas one by one, and when the user presses a key area, a capacitive circuit is formed between the pressed key area and the sensor.

[0015] The present application also provides a method for preparing a full-screen display module with touch buttons, comprising:

[0016] Forming a raised key area in the glass key layer, wherein the thickness of the key area is smaller than the thickness of the glass key layer;

[0017] The glass key layer is bonded to the glass cover plate through a first optical adhesive layer, so that the key area is a protrusion away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate;

[0018] The glass cover plate and the display module are assembled, and the display module is provided with sensors corresponding to the key areas one by one. When the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal.

[0019] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: a full-screen display module with touch-sensitive keys provided by the present application comprises a glass key layer, a first optical adhesive layer, a glass cover plate and a display module arranged in sequence, a key area being arranged in the glass key layer, and the key area being a protruding structure away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate; sensors corresponding to the key areas are arranged in the display module, and when the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal. In the present application, the first optical adhesive layer has good light transmittance, and the glass key layer and the glass cover plate are both made of transparent glass and also have good light transmittance, which can ensure that the display module still has good visibility after passing through the glass cover plate, the first optical adhesive layer and the glass key layer. In this way, full-screen display of the key area and non-key area in the display module can be achieved; the glass key layer and the glass cover plate of the present application are bonded together by the first optical adhesive layer, and the structure is simple. There is no need to perform special treatment on the first optical adhesive layer and the glass cover plate, and the pressing rebound of the key area can be achieved, thereby improving the user's tactile feel and will not affect the touch screen effect of the display module.

[0020] The present application also provides a method for preparing a full-screen display module with touch buttons. The preparation method is simple and does not require special processing of the first optical adhesive layer or the glass cover plate to achieve a good touch in the button area. The optical adhesive layer can be used to achieve full-screen display of the display module, thereby improving the user's touch feel and the aesthetics and convenience of the full-screen display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] In the attached figure:

[0024] Figure 1 This is a schematic diagram of the structure of the full-screen display module of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the glass keypad layer of this application;

[0026] Figure 3 Schematic diagram of key areas of different shapes in Example 2.

[0027] Figure numbers: 1. Glass key layer; 2. First optical adhesive layer; 3. Glass cover plate; 4. Second optical adhesive layer; 5. Touch screen; 6. Third optical adhesive layer; 7. Liquid crystal display; 8. Backlight module. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the mechanism or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0029] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, mechanisms, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0031] Example 1

[0032] like Figure 1-Figure 2 As shown, the present application provides a full-screen display module with touch-sensitive buttons, comprising a glass button layer 1, a first optical adhesive layer 2, a glass cover plate 3 and a display module arranged in sequence, wherein the glass button layer 1 is provided with a button area, and the button area is a protrusion away from the first optical adhesive layer 2; the first optical adhesive layer 2 completely covers the glass button layer 1 and the glass cover plate 3; the display module is provided with sensors corresponding to the button areas one by one, and when the button area is pressed toward the first optical adhesive layer 2, the corresponding sensor can receive a touch screen signal.

[0033] In the present application, the first optical adhesive layer 2 has good light transmittance, and the glass key layer 1 and the glass cover plate 3 are both made of transparent glass and also have good light transmittance, which can ensure that the display module still has good visibility after passing through the glass cover plate 3, the first optical adhesive layer 2 and the glass key layer 1. In this way, full-screen display of the key area and non-key area in the display module can be achieved; the glass key layer 1 and the glass cover plate 3 of the present application are bonded together by the first optical adhesive layer 2, and the structure is simple. There is no need to perform special treatment on the first optical adhesive layer 2 and the glass cover plate 3, and the pressing rebound of the key area can be achieved, thereby improving the user's tactile feel and will not affect the touch screen effect of the display module.

[0034] The light transmittance of the first optical adhesive layer 2 is better than that of air. Therefore, in the present application, the first optical adhesive layer 2 needs to completely cover the global area of ​​the glass key layer 1 and the glass cover plate 3 to avoid air filling, so that better light transmittance can be obtained. The glass key layer 1 and the glass cover plate 3 are both transparent materials with good light transmittance. In this way, the laminated structure formed by the glass key layer 1, the first optical adhesive layer 2 and the glass cover plate 3 are all materials with good light transmittance, ensuring that the user can clearly observe the display module through the laminated structure. That is to say, in the present application, the part of the display module corresponding to the key area and the part corresponding to the non-key area can be displayed, and a full touch screen display can be achieved.

[0035] In the present application, the key area in the glass key layer 1 is formed by chemical etching and chemical strengthening, that is, the glass key layer 1 is first chemically etched to form a groove in the key area, and then the groove is chemically strengthened so that the groove is raised relative to the glass key layer 1 to form a key area with a tactile feel. Specifically, the following methods can be used for formation:

[0036] During chemical etching, the non-key area in the glass key layer 1 needs to be masked, and only the key area is etched. Specifically, the acid-proof glue can be coated on the non-key area, and specifically, the photolithography process or the silk-screen process can be used to coat the non-key area, so that the key area is exposed.

[0037] The masked glass key layer 1 is etched, for example, hydrofluoric acid can be used to selectively etch the glass key layer 1, and the reaction principle and process are that hydrofluoric acid reacts with silicon dioxide or silicate to generate gaseous substance silicon tetrafluoride (SiF4).

[0038] After chemical etching, a groove is formed in the glass key layer 1. The groove is located in the glass key layer 1 and does not produce a raised structure protruding from the surface of the glass key layer 1, that is, no protruding tactile feeling is produced. The groove needs to be chemically strengthened so that the bottom of the groove produces stress away from the glass key layer 1 and protrudes from the glass key layer 1.

[0039] The main purpose of chemical strengthening is to increase the surface stress of the glass key layer 1, so that the glass key layer 1 can achieve the effect of anti-scratch and impact resistance. The main principle is to place the glass key layer 1 in a 420-degree Celsius potassium nitrate solution so that the sodium ions on the surface of the glass key layer 1 can be fully exchanged with the potassium ions in the potassium nitrate solution. The exchange time takes 0.5 hours to 10 hours. The present invention preferably takes 2 hours because the volume of potassium ions is larger than that of sodium ions. The mutual extrusion of potassium ions forms a stress layer on the glass surface, thereby achieving the effect of glass strengthening. After chemical strengthening, a raised key area is formed.

[0040] In the present application, the thickness of the glass keypad layer 1 is 300-700 microns, the thickness of the groove after chemical etching is about 100 microns, and the height of the keypad area after chemical strengthening relative to the glass keypad layer 1 is 80-200 microns. Figure 2 As shown, the first optical adhesive layer 2 covers the bottom of the glass key layer 1, and the maximum stroke of the key area during the pressing process is slightly smaller than the sum of the protruding height of the key area and the thickness of the glass key layer 1. The reason why it cannot be equal to the sum of the two is that when the key area is pressed, the air inside it cannot flow around, and can only be squeezed in the area between the key area and the first optical adhesive, and then rebound to reset the key area, while the air between the key area and the first optical adhesive cannot be completely squeezed.

[0041] In the present application, the thickness of the first optical adhesive layer 2 is relatively large, and can be specifically set to 100-400 microns. When the thickness of the glass key layer 1 is 300-700 microns, even if the side of the glass key layer 1 bonded to the first optical adhesive has a certain roughness, the thicker first optical adhesive layer 2 can remove the height difference in the glass key layer 1, so that the glass key layer 1 and the first optical adhesive layer 2 are fully bonded together to form an evenly distributed key area and a compression space of the first optical adhesive layer 2.

[0042] Compared with the existing patent CN117193567B which sets a support bar structure in the button area, the present application only needs to form a space capable of pressing and rebounding through the bonding of the first optical adhesive, without the need to form an additional support bar structure, thereby simplifying the preparation process of the full-screen display module and improving the preparation efficiency.

[0043] Example 2

[0044] like Figure 1-Figure 3 As shown, the present application provides a full-screen display module with touch-sensitive buttons, comprising a glass button layer 1, a first optical adhesive layer 2, a glass cover plate 3 and a display module arranged in sequence, wherein the glass button layer 1 is provided with a button area, and the button area is a protrusion away from the first optical adhesive layer 2; the first optical adhesive layer 2 completely covers the glass button layer 1 and the glass cover plate 3; the display module is provided with sensors corresponding to the button areas one by one, and when the button area is pressed toward the first optical adhesive layer 2, the corresponding sensor can receive a touch screen signal.

[0045] The shape of the button area of ​​this application can be designed according to product requirements, such as Figure 3 As shown, it can be specifically designed as a round button, a square button and a square button with corners. When the shapes of the buttons are different, a button pattern of the corresponding shape can be etched in the glass button layer 1 by chemical etching, and then the button pattern is chemically strengthened to form buttons of different shapes. When the button shapes and sizes are different, the stress generated in the button area during the chemical strengthening process is different, resulting in different torques when pressing the touch screen, so that users form different tactile experiences. The following uses three shapes and six sizes of glass buttons to illustrate the differences in tactile feel. Figure 3As shown, the circular keys include two sizes, with inner diameters of 7.3mm and 12.2mm respectively. The directional keys include two sizes: a square with a side length of 12.2mm (corresponding to an inscribed circle with a diameter of 12.2mm), and a rectangle with a length of 10.07 and a width of 7.3mm (corresponding to an inscribed circle with a diameter of 7.3mm). The square keys with corners include two sizes: a square with a side length of 12.2mm and curved corners (corresponding to an inscribed circle with a diameter of 12.2mm), and a rectangle with a length of 10.07, a width of 7.3mm and curved corners (corresponding to an inscribed circle with a diameter of 7.3mm).

[0046] In this application, the glass button needs to have a feeling similar to a mouse click during the pressing process. At the same time, when the finger leaves the glass button, the glass button needs to return to its original raised state. During the user's pressing process, the pressing feeling defined in this application includes the tactile feeling when pressing, including the click feeling and weight, and also includes the sound when pressing, that is, the sound of the glass button deforming. The pressing test of the above six sizes of glass buttons is shown in Table 1.

[0047] Table 1 Tactile test of glass buttons of different shapes and sizes

[0048]

[0049] in, It means that the key function is available, but there is no sound of glass deformation. Indicates that the key can be pressed but cannot be effectively rebounded. It means that the key can be pressed and rebound effectively, with a sound of glass deformation and good touch effect. Through experiments, it can be seen that the key with a length of 10.07, a width of 7.3mm and an arc-shaped corner (the corresponding inscribed circle diameter is 7.3mm) has the best pressing touch.

[0050] In the present application, the first optical adhesive layer is bonded to the glass key layer and the glass cover plate through a bonding process. The thickness of the glass key layer in the present application is 300-700 microns, and a thicker first optical adhesive layer is used for bonding to avoid bubbles during the bonding process. During the bonding process, since the glass key layer is strengthened, slight warping will also occur in the non-key area. Therefore, bubbles are prone to appear when the first optical adhesive layer is bonded, affecting the reliability and visual appearance of the product. The present application increases the thickness of the first optical adhesive layer to eliminate the warping height difference of the glass key layer and avoid the generation of bubbles. As shown in Table 2, when the thickness of the first optical adhesive layer is different, the bonding bubble rate is also different.

[0051] Table 2 The bonding bubble rate corresponding to different first optical adhesive layer thicknesses

[0052]

[0053] It can be seen that when the thickness of the glass keypad layer is 300-700 microns, setting the thickness of the first optical adhesive layer to 100-400 microns can effectively avoid the generation of bubbles during the bonding process.

[0054] In the bonding process of this application, the glass key layer, the first optical adhesive layer and the glass cover plate need to be stacked and placed first, and then vacuumed, and then bonded after vacuuming to achieve a tight connection between the three. Different bonding processes will also have a certain impact on the appearance and key sensitivity of the glass key. As shown in Table 3, the performance of the glass key is shown in Table 3 under different vacuum values, vacuum times, bonding temperatures, bonding pressures and bonding times.

[0055] Table 3 Effects of different bonding processes on the performance of glass buttons

[0056]

[0057] It can be seen that the optimal parameters for laminating the first optical adhesive layer with the glass key layer and the glass cover are as follows: vacuum value is 30Kpa, vacuum time is 8 seconds, laminating temperature is 40 seconds, laminating pressure is 0.4Mpa, and laminating time is 15 seconds. Under this laminating parameter, no bubbles are generated in the glass key layer, and the key pressing function is normal. Here, the key pressing function is normal, which means that the glass key can be pressed and can rebound, and there is a sound of glass deformation during the pressing process, and the tactile effect is good.

[0058] Further, such as Figure 1 As shown, the display module of the present application includes a touch screen 5, a liquid crystal display screen 7 and a backlight module 8 which are arranged in sequence, the touch screen 5 is bonded to the glass cover plate 3 through a second optical adhesive layer 4, the touch screen 5 is bonded to the liquid crystal display screen 7 through a third optical adhesive layer 6, and the liquid crystal display screen 7 is embedded in the backlight module 8.

[0059] Among them, the touch screen 5 is provided with sensors corresponding to the key areas one by one. When the user presses the key area, a capacitive circuit is formed between the pressed key area and the sensor. After the corresponding sensor receives the signal change, it can be fed back to the host to implement the corresponding function. It should be noted that when the key area is pressed, the distance between the glass key and the sensor is shortened, and a capacitive circuit is formed between the user's finger and the sensor, thereby triggering the function corresponding to the sensor to start. When the key area is not pressed, the distance between the glass key and the sensor is large, and an effective capacitive circuit cannot be formed. When there is no finger on the glass key, an effective capacitive circuit cannot be formed.

[0060] In the present application, the second optical adhesive layer 4 and the third optical adhesive layer 6 only play a connecting role, and there is no need to eliminate the height difference. Therefore, it is only necessary to ensure that they have good light transmittance. The thickness can be set to 45-55 microns to achieve the bonding between the touch screen 5, the liquid crystal display 7 and the glass cover 3.

[0061] The full-screen display module with touch-sensitive buttons formed in the present application, wherein the hardness of the glass button is about 55H, can still maintain normal pressing function and touch screen function after clicking 1 million times. It can be applied to outdoor mixers or other human-computer interaction interfaces. At the same time, the full-screen display module in the present application can achieve sealing between different layers through the first optical adhesive layer 2, the second optical adhesive layer 4 and the third optical adhesive layer 6, and has a significant waterproof advantage. Even if it is used outdoors on rainy days, it will not affect the normal function of the full-screen display module.

[0062] Example 3

[0063] The present application also provides a method for preparing a full-screen display module with touch buttons, comprising:

[0064] S1: forming a raised key area in the glass key layer 1 , wherein the thickness of the key area is smaller than the thickness of the glass key layer 1 .

[0065] Specifically, the key area is formed by chemical etching and chemical strengthening, that is, the glass key layer 1 is first chemically etched to form a groove in the key area, and then the groove is chemically strengthened so that the groove is raised relative to the glass key layer 1 to form a key area with a tactile feel. The thickness of the glass key layer 1 is 300-700 microns, the thickness of the groove after chemical etching is about 100 microns, and the height of the key area raised relative to the glass key layer 1 after chemical strengthening is 80-200 microns.

[0066] The key area is specifically a rectangle with a length of 10.07, a width of 7.3mm and curved corners (the diameter of the corresponding inscribed circle is 7.3mm).

[0067] S2: The glass key layer 1 is bonded to the glass cover plate 3 through the first optical adhesive layer 2, so that the key area is a protrusion away from the first optical adhesive layer 2; the first optical adhesive layer 2 completely covers the glass key layer 1 and the glass cover plate 3; the thickness of the first optical adhesive layer 2 is 100-400 microns.

[0068] The process parameters during bonding are as follows: vacuum value is 30Kpa, vacuum time is 8 seconds, bonding temperature is 40 seconds, bonding pressure is 0.4Mpa, and bonding time is 15 seconds.

[0069] S3: Assemble the glass cover plate 3 and the display module, wherein the display module is provided with sensors corresponding to the key areas one by one, and when the key area is pressed toward the first optical adhesive layer 2, the corresponding sensor can receive a touch screen signal.

[0070] The display module includes a touch screen 5, a liquid crystal display screen 7 and a backlight module 8 which are arranged in sequence. The touch screen 5 is bonded to the glass cover plate 3 through a second optical adhesive layer 4, the touch screen 5 is bonded to the liquid crystal display screen 7 through a third optical adhesive layer 6, and the liquid crystal display screen 7 is embedded in the backlight module 8.

[0071] Among them, the touch screen 5 is provided with sensors corresponding to the key areas one by one. When the user presses the key area, a capacitive circuit is formed between the pressed key area and the sensor. After the corresponding sensor receives the signal change, it can be fed back to the host to implement the corresponding function. It should be noted that when the key area is pressed, the distance between the glass key and the sensor is shortened, and a capacitive circuit is formed between the user's finger and the sensor, thereby triggering the function corresponding to the sensor to start. When the key area is not pressed, the distance between the glass key and the sensor is large, and an effective capacitive circuit cannot be formed. When there is no finger on the glass key, an effective capacitive circuit cannot be formed.

[0072] In the present application, the second optical adhesive layer 4 and the third optical adhesive layer 6 only play a connecting role, and there is no need to eliminate the height difference. Therefore, it is only necessary to ensure that they have good light transmittance. The thickness can be set to 45-55 microns to achieve the bonding between the touch screen 5, the liquid crystal display 7 and the glass cover 3.

[0073] The preparation method of the present application is simple, and a good touch feeling in the key area can be achieved without special processing of the first optical adhesive layer 2 or the glass cover plate 3. The full-screen display of the display module can be achieved with the help of the optical adhesive layer, thereby improving the user's touch feeling and the aesthetics and convenience of the full-screen display module.

[0074] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A full-screen display module with touch buttons, characterized in that: The invention comprises a glass key layer, a first optical adhesive layer, a glass cover plate and a display module which are arranged in sequence, wherein a key area is arranged in the glass key layer, and the key area is a convex structure away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate; the key area is firstly formed into a groove in the glass key layer by chemical etching, and then formed into a convex relative to the glass key layer by chemical strengthening; the maximum stroke of the key area during the pressing process is less than the sum of the convex height of the key area and the thickness of the glass key layer; The display module is provided with sensors corresponding to the key areas one by one, and when the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal; The thickness of the glass key layer is 300-700 microns, the protrusion height of the key area relative to the glass key layer is 80-200 microns, and the thickness of the first optical adhesive layer is 100-400 microns; The key area is rectangular, and the four corners of the rectangular key area are arc-shaped corners; the length of the key area is 10-11 mm, and the width of the key area is 7-8 mm; The parameters for laminating the first optical adhesive layer, the glass key layer and the glass cover plate are as follows: the vacuum value is 30 Kpa, the vacuum time is 8 seconds, the vacuum temperature is 40 seconds, the laminating pressure is 0.4 Mpa, and the laminating time is 15 seconds.

2. A full-screen display module with touch buttons according to claim 1, characterized in that: The display module includes a touch screen, a liquid crystal display screen and a backlight module. The touch screen is bonded to the glass cover plate via a second optical adhesive layer, the touch screen is bonded to the liquid crystal display screen via a third optical adhesive layer, and the liquid crystal display screen is embedded in the backlight module.

3. A full-screen display module with touch buttons according to claim 2, characterized in that: The thickness of the second optical adhesive layer and the third optical adhesive layer is 45-55 microns.

4. A full-screen display module with touch buttons according to claim 2, characterized in that: The touch screen is provided with sensors corresponding to the key areas one by one. When the user presses a key area, a capacitive circuit is formed between the pressed key area and the sensor.

5. A method for preparing a full-screen display module with touch buttons, characterized in that: include: A raised key area is formed in the glass key layer, and the thickness of the key area is less than the thickness of the glass key layer; the key area is firstly formed into a groove in the glass key layer by chemical etching, and then formed into a protrusion relative to the glass key layer by chemical strengthening; the thickness of the glass key layer is 300-700 microns, and the protrusion height of the key area relative to the glass key layer is 80-200 microns; the key area is rectangular, and the four corners of the rectangular key area are arc corners; the length of the key area is 10-11 mm, and the width of the key area is 7-8 mm; The glass key layer is bonded to the glass cover plate through the first optical adhesive layer, so that the key area is a protrusion away from the first optical adhesive layer; the first optical adhesive layer completely covers the glass key layer and the glass cover plate; the maximum stroke of the key area during the pressing process is less than the sum of the protrusion height of the key area and the thickness of the glass key layer; the parameters when the first optical adhesive layer is bonded to the glass key layer and the glass cover plate are as follows: the vacuum value is 30Kpa, the vacuum time is 8 seconds, the vacuum temperature is 40 seconds, the bonding pressure is 0.4Mpa, and the bonding time is 15 seconds; the thickness of the first optical adhesive layer is 100-400 microns; The glass cover plate and the display module are assembled, and the display module is provided with sensors corresponding to the key areas one by one. When the key area is pressed toward the first optical adhesive layer, the corresponding sensor can receive a touch screen signal.

Images