Vehicle-mounted rearview mirror

Abstract

The utility model discloses a vehicle-mounted rearview mirror which comprises a backlight module, a display module, a TN mirror and a cover plate which are sequentially stacked from bottom to top, and the display module comprises a lower polaroid, a lower substrate, an upper substrate and an upper polaroid which are sequentially stacked from bottom to top. The lower substrate is longer than the upper substrate and extends outwards to form a step, the upper polaroid and the TN mirror are pasted and fixed through first optical cement, the TN mirror and the cover plate are fixed through second optical cement, and a semi-reflecting and semi-transmitting layer is sputtered on the lower surface of the TN mirror or the upper surface of the upper polaroid. The semi-reflecting and semi-transmitting effect can be achieved through the semi-reflecting and semi-transmitting layer formed through sputtering. A sputtering coating procedure can be added in the production process of the TN mirror or the upper polaroid, the cost of the sputtering coating procedure is much lower than that of attaching a semi-transparent and semi-reflective film, and the steps of cutting, film tearing and attaching are not needed, so that the semi-transparent and semi-reflective effect of the vehicle-mounted rearview mirror can be achieved while the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a vehicle-mounted rearview mirror. Background Art

[0002] Common vehicle rearview mirrors with display modules generally have a semi-transparent and semi-reflective film attached to the lower surface of the TN mirror. When the TN mirror is closed, the light emitted by the backlight module cannot pass through the TN mirror, thereby achieving a mirror effect; when the TN mirror is turned on, the light emitted by the backlight module can pass through the TN mirror, thereby achieving a display effect. However, the cost of attaching the semi-transparent and semi-reflective film is relatively high. The semi-transparent and semi-reflective film requires multiple release films during production, which are then cut and finally attached. Therefore, how to reduce production costs while achieving the semi-transparent and semi-reflective effect of vehicle rearview mirrors has become a problem that plagues major manufacturers. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to achieve the semi-transparent and semi-reflective effect of the vehicle-mounted rearview mirror while reducing the production cost.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a vehicle-mounted rearview mirror, which includes a backlight module, a display module, a TN mirror and a cover plate which are stacked in sequence from bottom to top, the display module includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer which are stacked in sequence from bottom to top, the lower substrate is longer than the upper substrate and extends outward to form a step, the upper polarizer is fixed to the TN mirror by a first optical adhesive, the TN mirror is fixed to the cover plate by a second optical adhesive, and the lower surface of the TN mirror or the upper surface of the upper polarizer is sputtered with a semi-reflective and semi-transmissive layer.

[0006] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the semi-reflective and semi-transparent layer on the lower surface of the TN mirror is an AR sputtered layer.

[0007] As a preferred embodiment of the vehicle rearview mirror provided by the utility model, a protrusion is provided on the edge of the upper surface of the lower substrate extending outward, and a buffer glue is provided on the upper surface of the lower substrate between the protrusion and the upper substrate, and the buffer glue abuts against the cover plate.

[0008] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the upper surface of the protrusion is flush with the upper surface of the upper substrate.

[0009] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the buffer glue is silicone glue.

[0010] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, a rounded corner is arranged between the protrusion and the lower substrate.

[0011] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the upper surface of the lower substrate and the side surfaces of the protrusion are rough surfaces.

[0012] As a preferred embodiment of the vehicle-mounted rearview mirror provided by the utility model, a plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

[0013] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the shape of the groove is square or circular.

[0014] As a preferred implementation of the vehicle-mounted rearview mirror provided by the utility model, the plastic layer located in the visible area is transparent plastic.

[0015] The utility model has the following beneficial effects:

[0016] Since the lower surface of the TN mirror or the upper surface of the upper polarizer is sputtered with a semi-reflective and semi-transparent layer, the semi-reflective and semi-transparent layer formed by sputtering can also achieve a semi-reflective and semi-transparent effect. When the TN mirror is closed, the light emitted by the backlight module cannot pass through the TN mirror, thereby achieving a mirror effect; when the TN mirror is turned on, the light emitted by the backlight module can pass through the TN mirror, thereby achieving a display effect. It can add a sputtering process in the production process of the TN mirror or the upper polarizer, which is much less expensive than attaching a semi-transparent and semi-reflective film, and does not require cutting, tearing and attaching steps. Therefore, it can reduce production costs while achieving the semi-transparent and semi-reflective effect of the vehicle rearview mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The utility model provides a structural schematic diagram of a vehicle-mounted rearview mirror.

[0019] Figure 2 This is a schematic diagram of the structure of Example 2.

[0020] Figure 3 This is a schematic diagram of the structure of Example 3.

[0021] Figure 4 for Figure 3 Schematic diagram of the decomposition structure.

[0022] Figure 5 for Figure 3 Schematic diagram of the improved structure.

[0023] Description of Figure Numbers:

[0024] Backlight module 100; display module 200; TN mirror 1; cover plate 2; lower polarizer 3; lower substrate 4; upper substrate 5; upper polarizer 6; first optical adhesive 7; second optical adhesive 8; semi-reflective and semi-transmissive layer 11;

[0025] Protrusion 41; Buffer rubber 42;

[0026] Plastic layer 9; groove 21. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] The utility model provides a vehicle-mounted rearview mirror, which comprises a backlight module, a display module, a TN mirror and a cover plate which are sequentially stacked from bottom to top, the display module comprises a lower polarizer, a lower substrate, an upper substrate and an upper polarizer which are sequentially stacked from bottom to top, the lower substrate is longer than the upper substrate and extends outward to form a step, the upper polarizer is fixed to the TN mirror by a first optical adhesive, the TN mirror is fixed to the cover plate by a second optical adhesive, and a semi-reflective and semi-transmissive layer is sputtered on the lower surface of the TN mirror or the upper surface of the upper polarizer.

[0031] Since the lower surface of the TN mirror or the upper surface of the upper polarizer is sputtered with a semi-reflective and semi-transparent layer, the semi-reflective and semi-transparent layer formed by sputtering can also achieve a semi-reflective and semi-transparent effect. When the TN mirror is closed, the light emitted by the backlight module cannot pass through the TN mirror, thereby achieving a mirror effect; when the TN mirror is turned on, the light emitted by the backlight module can pass through the TN mirror, thereby achieving a display effect. It can add a sputtering process in the production process of the TN mirror or the upper polarizer, which is much less expensive than attaching a semi-transparent and semi-reflective film, and does not require cutting, tearing and attaching steps. Therefore, it can reduce production costs while achieving the semi-transparent and semi-reflective effect of the vehicle rearview mirror.

[0032] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0033] Example 1

[0034] See also Figure 1, a vehicle-mounted rearview mirror provided by the utility model, comprising a backlight module 100, a display module 200, a TN mirror 1 and a cover plate 2 which are sequentially stacked from bottom to top, the display module 200 comprising a lower polarizer 3, a lower substrate 4, an upper substrate 5 and an upper polarizer 6 which are sequentially stacked from bottom to top, the lower substrate 4 being longer than the upper substrate 5 and extending outward to form a step, the upper polarizer 6 and the TN mirror 1 being glued and fixed by a first optical adhesive 7, the TN mirror 1 and the cover plate 2 being fixed by a second optical adhesive 8, and a semi-reflective and semi-transparent layer 11 being sputtered on the lower surface of the TN mirror 1 or the upper surface of the upper polarizer 6. Since the semi-reflective and semi-transparent layer 11 is sputtered on the lower surface of the TN mirror 1 or the upper surface of the upper polarizer 6, the semi-reflective and semi-transparent effect can also be achieved by the semi-reflective and semi-transparent layer 11 formed by sputtering. When the TN mirror 1 is turned off, the light emitted by the backlight module 100 cannot pass through the TN mirror 1, thereby achieving a mirror effect; when the TN mirror 1 is turned on, the light emitted by the backlight module 100 can pass through the TN mirror 1, thereby achieving a display effect. It can add a sputtering process in the production process of the TN mirror 1 or the upper polarizer 6, which is much less expensive than attaching a semi-transparent and semi-reflective film, and does not require cutting, tearing and attaching steps, so it can reduce production costs while achieving the semi-transparent and semi-reflective effect of the vehicle rearview mirror.

[0035] Furthermore, the semi-reflective and semi-transmissive layer 11 on the lower surface of the TN mirror 1 is an AR sputtered layer.

[0036] Example 2

[0037] See also Figure 2 As a further optimization scheme of Example 1, in this embodiment, the lower substrate 4 is longer than the upper substrate 5 and extends outward, and a protrusion 41 is provided on the edge of the upper surface of the lower substrate 4 extending outward, and a buffer glue 42 is provided on the upper surface of the lower substrate 4 between the protrusion 41 and the upper substrate 5, and the buffer glue 42 abuts against the cover plate 2. Since the edge of the lower substrate 4 is provided with a protrusion 41, the protrusion 41 can limit the flow of the buffer glue 42, so that the shape of the buffer glue 42 is easy to control, and there will be no overflow of glue or incomplete glue dispensing. Thereby preventing the LCD screen from being unable to be assembled with the casing. In addition, the problem of poor buffering effect caused by incomplete glue dispensing and easy rupture of the lower substrate 4 is avoided, and the LCD screen is prevented from displaying abnormally.

[0038] Furthermore, the upper surface of the protrusion 41 is flush with the upper surface of the upper substrate 5 to further limit the flow of the buffer glue 42, so that the shape of the buffer glue 42 is easy to control without overflowing glue or incomplete glue dispensing.

[0039] Furthermore, the buffer glue 42 is silicone glue.

[0040] Furthermore, a chamfer is provided between the protrusion 41 and the lower substrate 4 so that the buffer glue 42 can more easily fill the space between the protrusion 41 on the upper surface of the lower substrate 4 and the upper substrate 5. The protrusion 41 with a chamfer can make the buffer glue 42 flow more smoothly into the space between the protrusion 41 on the upper surface of the lower substrate 4 and the upper substrate 5, making it less likely for bubbles to appear.

[0041] Furthermore, the upper surface of the lower substrate 4 and the side surfaces of the protrusions 41 are rough surfaces to improve the fixing effect of the buffer glue 42 .

[0042] Furthermore, the rough surface is a frosted surface or a diamond knurled surface to further improve the fixing effect of the buffer glue 42 .

[0043] Example 3

[0044] See also Figures 3 to 5 As a further optimization scheme of Example 1, in this embodiment, the upper surface of the cover plate 2 is covered with a plastic layer 9, and a plurality of grooves 21 are formed downward on the upper surface of the cover plate 2 by etching, and a portion of the lower surface of the plastic layer 9 is embedded in each groove 21. Since the surface of the groove 21 formed by etching has a certain degree of roughness, the plastic layer 9 can be tightly bonded to the groove 21 to prevent the cover plate 2 and the plastic layer 9 from falling off. Since the upper part of the cover plate 2 is covered with a plastic layer 9, and a plurality of grooves 21 are formed on the upper surface of the cover plate 2 by etching, and the plastic layer 9 can be embedded in the interior of the plurality of grooves 21, the grooves 21 formed by etching make the inner surface of the grooves 21 have a certain degree of roughness, and the surface of the grooves 21 with a certain degree of roughness can improve the bonding force between the grooves 21 and the plastic layer 9, thereby reducing the possibility of separation of the grooves 21 and the plastic layer 9. When the LCD screen is hit or falls, the plastic layer 9 on the upper surface of the cover plate 2 can directly withstand the external force, thereby preventing the external force from directly acting on the cover plate 2. Since the plastic layer 9 can absorb most of the energy, the remaining external force is very weak when it acts on the cover plate 2, thereby effectively reducing the risk of the cover plate 2 being broken or damaged; and when the LCD screen is subjected to external force, even if the external force is large, it will only damage the plastic layer 9 on the upper surface of the cover plate 2, and will not directly damage the cover plate 2. Therefore, it can be avoided that the cover plate 2 is damaged and the LCD screen cannot be used normally, which brings a better user experience to users and improves the anti-fall ability of the LCD screen.

[0045] Furthermore, the shape of the groove 21 can be square or circular, and the cross-sectional shape of the groove 21 can be a closing groove that is narrow on the outside and wide on the inside. In the present embodiment, the cross-sectional shape of the groove 21 is an isosceles trapezoid, and the groove 21 is in the shape of an elongated strip. The isosceles trapezoid-shaped groove 21 can make the plastic layer 9 tightly embedded in the groove 21, thereby avoiding separation of the groove 21 from the plastic layer 9, thereby preventing the cover plate 2 from falling off from the plastic layer 9. The elongated groove 21 can increase the fitting portion between the plastic layer 9 and the groove 21, thereby improving the fitting strength between the groove 21 and the plastic layer 9.

[0046] Furthermore, the plastic layer 9 in the visible area is transparent plastic to prevent the plastic layer 9 from affecting the normal display of the liquid crystal display screen. The plastic layer 9 in the non-visible area can be non-transparent plastic, which can be colorful, thereby improving the beauty of the liquid crystal display screen and improving the competitiveness of the product.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A vehicle-mounted rearview mirror, characterized in that: It includes a backlight module, a display module, a TN mirror and a cover plate which are stacked in sequence from bottom to top. The display module includes a lower polarizer, a lower substrate, an upper substrate and an upper polarizer which are stacked in sequence from bottom to top. The lower substrate is longer than the upper substrate and extends outward to form a step. The upper polarizer is fixed to the TN mirror by a first optical adhesive, and the TN mirror is fixed to the cover plate by a second optical adhesive. The lower surface of the TN mirror or the upper surface of the upper polarizer is sputtered with a semi-reflective and semi-transmissive layer.

2. The vehicle-mounted rearview mirror according to claim 1, characterized in that: The semi-reflective and semi-transmissive layer on the lower surface of the TN mirror is an AR sputtered layer.

3. The vehicle-mounted rearview mirror according to claim 1, characterized in that: A protrusion is arranged on the edge of the upper surface of the lower substrate extending outward, and a buffer glue is arranged on the upper surface of the lower substrate between the protrusion and the upper substrate, and the buffer glue abuts against the cover plate.

4. The vehicle-mounted rearview mirror according to claim 3, characterized in that: An upper surface of the protrusion is flush with an upper surface of the upper substrate.

5. The vehicle-mounted rearview mirror according to claim 3, characterized in that: The buffer glue is silicone glue.

6. The vehicle-mounted rearview mirror according to claim 3, characterized in that: A rounded corner is arranged between the protrusion and the lower substrate.

7. The vehicle-mounted rearview mirror according to claim 3, characterized in that: The upper surface of the lower substrate and the side surfaces of the protrusion are rough surfaces.

8. The vehicle-mounted rearview mirror according to claim 1, characterized in that: A plurality of grooves are formed on the upper surface of the cover plate by etching, and a plastic layer is covered on the upper side of the cover plate, and the plastic layer is embedded in the plurality of grooves.

9. The vehicle-mounted rearview mirror according to claim 8, characterized in that: The shape of the groove is square or circular.

10. The vehicle-mounted rearview mirror according to claim 8, characterized in that: The plastic layer located in the visible area is transparent plastic.

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