CN202995180U - Car display equipment and car audio-visual system - Google Patents

Abstract

The utility model discloses a vehicle display equipment and a vehicle audio-visual system, the vehicle display equipment comprises a circuit board, a backlight module, a positioning frame, a liquid crystal display layer and a fixing frame; the circuit board is provided with a plurality of through grooves, the backlight module is arranged on the circuit board and comprises a light guide plate and a plurality of light emitting diodes, the light guide plate is provided with a light incident surface, and the light emitting diodes are electrically connected with the circuit board and emit light rays towards the light incident surface; the positioning frame comprises a pressing and pulling plate used for pressing and pulling the backlight module; the liquid crystal display layer is provided with a visible area and is arranged on the positioning frame; the fixing frame covers the liquid crystal display layer and exposes the visible area, the fixing frame is provided with a plurality of hooks penetrating through the penetrating grooves, and the fixing frame abuts against the circuit board after rotating for an angle so as to fix the backlight module, the positioning frame and the liquid crystal display layer. The vehicle audio-video system comprises the vehicle display equipment.

Description

Car display equipment and car audio-visual system

technical field

The utility model relates to a backlight unit and a display device, in particular to a vehicle backlight unit and a vehicle display device. the

Background technique

Liquid crystal display (liquid crystal display) is a flat display device, which has the advantages of thinness and low energy consumption, and is widely used in laptop computers, tablet computers, mobile phones and automotive instrument displays. Among them, the shock resistance of the liquid crystal display installed on the dashboard of the car is much higher than that of liquid crystal displays in other application fields. the

The liquid crystal display includes a liquid crystal display layer and a backlight module for providing the display light source of the liquid crystal display. The backlight module is arranged under the liquid crystal display layer and emits light to light the liquid crystal display layer to achieve display effect. the

The liquid crystal display used in the existing automobile instrument display uses a direct-lit backlight module to provide a light source for lighting the liquid crystal display layer. The direct-lit backlight module uses a plurality of light-emitting diodes arranged in a matrix or crossed to emit light directly toward the liquid crystal display layer to light up the liquid crystal display layer. the

However, since light-emitting diodes are lighting sources, and their luminous intensity is inversely proportional to the square of the light-emitting distance, if the distance between two adjacent light-emitting diodes is too long, the liquid crystal display layer cannot be effectively illuminated, making the liquid crystal The display effect of the display is not enough; and if the distance between two adjacent light-emitting diodes is too short, it may cause the light intensity transmitted to the liquid crystal display layer to be too strong, causing discomfort to the viewer, and shortening the distance between two adjacent light-emitting diodes. distance, it is bound to increase the number of light-emitting diodes installed, increasing the cost of expenditure. the

Utility model content

An object of the present invention is to provide a display device for a vehicle, which can provide a display effect of uniform luminance. the

Another object of the present invention is to provide a car audio-visual system having the aforementioned car display device. the

In order to achieve the above object, the utility model provides a vehicle display device, comprising:

A circuit board having a plurality of slots;

A backlight module is arranged on the circuit board, and the backlight module includes a light guide plate and a plurality of light emitting diodes;

The light guide plate includes a light incident surface;

The plurality of light emitting diodes are electrically connected to the circuit board and emit light toward the light incident surface;

a positioning frame, including a pressing plate, pressing the backlight module;

A liquid crystal display layer with a visible area, the liquid crystal display layer is arranged on the positioning frame; and

A fixed frame, covering the liquid crystal display layer and exposing the visible area, the fixed frame has a plurality of hooks, and the hooks extend through the grooves, rotate an angle and abut against the circuit board to fix the backlight module, the positioning frame and the liquid crystal display layer.

Further, the backlight module further includes a reflection sheet disposed between the circuit board and the light guide plate. the

Further, the backlight module further includes a bonding part, which is arranged between the circuit board and the reflection sheet and combines the reflection sheet and the circuit board. the

Further, the bonding member is glue or double-sided tape. the

Further, wherein the backlight module also includes:

A diffusion film is arranged on the light guide plate;

A brightness enhancement film is arranged on the diffusion film;

Two first adhesive parts, located at two edges of the light guide plate and combined with the light guide plate and the diffusion film; and

Two second adhesive parts are located at two edges of the diffusion film and combine the diffusion film and the brightness enhancement film, wherein the installation positions of the second adhesive parts are aligned with the installation positions of the first adhesive parts.

Furthermore, a plurality of semicircular diffusion points are formed on an upper surface of the diffusion film. the

Further, a plurality of V-shaped protrusions are formed on an upper surface of the brightness enhancement film. the

Further, the first adhesive member and the second adhesive member are double-sided adhesive tapes respectively. the

Further, the light guide plate further includes a first surface and a second surface opposite to the first surface, the first surface and the second surface are respectively adjacent to the light incident surface, and the first surface has a plurality of guiding surfaces. Light microstructures, the light guide microstructures are V-shaped. the

Further, a light-shielding member is located at one end of the light guide plate having the light-incident surface, and the light-shielding member covers the light-emitting diodes and partially covers the second surface. the

Further, the light-emitting diode is a side-emitting light-emitting diode. the

Further, a plurality of retaining walls are formed on the top edge of the positioning frame, and the liquid crystal display layer is located in the retaining walls. the

Further, wherein the circuit board has a plurality of through holes, the bottom of the pressure plate has a plurality of positioning posts, and the positioning posts are inserted into the through holes. the

This use model also provides a car audio-visual system, including:

The above-mentioned vehicle display device;

a plurality of switch assemblies disposed on the circuit board and electrically connected to the circuit board; and

a casing, installed on the circuit board, and has an opening, the visible area of the liquid crystal display layer is exposed to the opening;

A plurality of panels are arranged on the casing and correspond to the switch components.

The vehicle display device provided by the utility model can provide a uniform luminance display effect, and the fixing frame of the vehicle display device of the utility model is combined with a circuit board to fix the backlight module, the positioning frame and the The liquid crystal display layer improves the overall shock resistance, and avoids the situation that the backlight module, the positioning frame and the liquid crystal display layer are displaced or damaged during the driving of the car. The utility model also provides a vehicle display device car audio-visual system. the

Description of drawings

Fig. 1 is the three-dimensional exploded view of an embodiment of the vehicle display device of the present utility model;

Fig. 2 is a three-dimensional combined view of the vehicle display device of the present invention;

3 is a top view of the vehicle display device of the present invention;

Fig. 4 is a sectional view of the vehicle display device of the present invention;

Fig. 5 is the enlarged sectional view of part A in Fig. 4;

6 is a side view and a schematic diagram of the light traveling path of the vehicle backlight module of the present invention;

Fig. 7 is a three-dimensional exploded view of an embodiment of the vehicle audio-visual system of the present invention;

Fig. 8 is a three-dimensional combination diagram of the vehicle audio-visual system of the present invention;

Fig. 9 is a front view of the vehicle audio-visual system of the present invention;

Fig. 10 is a schematic diagram of the vehicle display device of the present invention used on the vehicle dashboard.

1. Car audio-visual system, 10. Car display equipment;

12. Circuit board, 120. Grooving;

122. Perforation, 14. Backlight module;

140. Reflector, 142. Light guide plate;

1420. Light incident surface, 1422. First surface;

1423. Light guiding microstructure, 1424. Second surface;

144. Light emitting diode, 146. Diffusion film;

1460, 1480. Upper surface;

1462. Diffusion point, 148. Brightness enhancement film;

1482. Protrusion, 150. Shading sheet;

152. Combined parts, 154. The first adhesive part;

156. The second adhesive part, 16. The positioning frame;

160. Depressing plate, 162. Positioning post;

164. Retaining wall, 18. Liquid crystal display layer;

180. Visual area, 182 frame;

20. fixed frame, 200. hook;

22. Switch assembly, 30. Housing;

300. Hole, 302. Panel;

L. Set the length.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model. the

As shown in FIG. 1 , FIG. 2 and FIG. 3 , they are respectively a three-dimensional exploded view, a three-dimensional assembled view and a top view of the vehicle display device of the present invention. The vehicle display device 10 includes a circuit board 12 , a backlight module 14 , a positioning frame 16 , a liquid crystal display layer 18 and a fixing frame 20 . the

The circuit board 12 can be a printed circuit board (printed circuit board, PCB), or the circuit board 12 can also be a substrate with pre-formed circuit wiring and welding pads; wherein the substrate can use copper, aluminum, ceramics or other materials with high Made of thermally conductive material, it can quickly dissipate the heat energy generated when the vehicle display device 10 is in operation. The circuit board 12 is formed with a plurality of through-slots 120 and a plurality of through-holes 122. In this embodiment, the circuit board 12 includes four through-slots 120 and two through-holes 122, but it should be noted that this number is not a limitation of the present invention. The circuit board 12 is also provided with a plurality of switch assemblies 22 . the

As shown in FIG. 4 and FIG. 5 , they are respectively a cross-sectional view and a partial enlarged cross-sectional view of the vehicle display device of the present invention. The backlight module 14 is used to provide a light source for lighting up the liquid crystal display layer 18 . The backlight module 14 includes a reflector 140, a light guide plate 142, a plurality of light emitting diodes (Light Emitting Diode, LED) 144, a diffuser film (diffuser film) 146, a brightness enhancement film (Brightness Enhancement Film, BEF) 148 and a Shading sheet 150. the

The reflector 140 is disposed on the circuit board 12, and a bonding member 152 is disposed between the reflector 140 and the circuit board 12 to combine the reflector 140 and the circuit board 12 to prevent the reflector 140 and the circuit from The plate 12 falls off due to force extrusion or vibration; the joint 152 can be double-sided tape or glue. The reflective sheet 140 can be a metal sheet or polyester (polyethylene terephthalate, PET) coated with a resin compound, and the reflective sheet 140 is preferably white or silver or other color with better reflective effect. the

The light guide plate 142 is arranged on the reflection sheet 140, and it uses light-transmitting materials, such as: polymethylmethacrylate (Polymethylmethacrylate, PMMA), propylene (acryl), polycarbonate (Polycarbonate, PC), polyolefins (Polyolefins ) or synthetic resin, made by injection molding or injection molding. the

As shown in FIG. 1 , the light guide plate 142 has a light incident surface 1420 , a first surface 1422 and a second surface 1424 opposite to the first surface 1422 . In this embodiment, the light guide plate 142 is roughly rectangular, the light incident surface 1420 is one side in the short side direction of the light guide plate 142 , the first surface 1422 and the second surface 1424 are larger portions of the light guide plate 142 . One side of the area is not limited to this in actual implementation. the

The first surface 1422 is adjacent to the light incident surface 1420, and a plurality of light guide microstructures 1423 (as shown in FIG. 6 ) are formed thereon; in this embodiment, the light guide microstructures 1423 are V-shaped. On the first surface 1422, the length L of the light guide microstructures 1423 is about 7 micrometers. The second surface 1424 is adjacent to the light incident surface 1420 and opposite to the first surface 1422 , and the second surface 1424 is a light exit surface of the light guide plate 142 . the

When actually manufacturing the light guide plate 142, laser etching is used to form a plurality of concave parts on the injection mold core of the light guide plate 142, and the concave parts are designed to be V-shaped; after that, the aforementioned light-transmitting material is injected into the mold core to make the light guide plate 142 The light guide microstructures 1423 corresponding to the recesses are formed on the light plate 142 . the

As shown in FIG. 1 , the LEDs 144 are disposed on the circuit board 12 and electrically connected to the circuit board 12 , wherein the LEDs 144 can be electrically connected to the circuit board 12 through a soldering process. The LEDs 144 are disposed adjacent to the light-incident surface 1420 and emit light toward the light-incident surface 1420 (as shown in FIG. 6 ). In this embodiment, the backlight module 14 includes four light-emitting diodes 144 as an example for illustration, and the light-emitting diodes 144 are arranged in a straight line, but it should be noted that the number and arrangement are not limitations of the present invention; moreover, the The LEDs 144 are preferably edge-emitting LEDs, and the light-emitting surface of the edge-emitting LEDs faces the light incident surface 1420 . the

As shown in FIG. 6 , the light emitted by the LEDs 144 enters the light guide plate 142 through the light incident surface 1420 . When the incident angle of the light incident on the light guide plate 142 is smaller than the critical angle of total internal reflection, the light can be directly refracted from the first surface 1422 or the second surface 1424 . And when the incident angle of the light incident on the light guide plate 142 is greater than or equal to the critical angle of total internal reflection, the light passes back and forth between the first surface 1422 and the second surface 1424 in the form of total internal reflection. When the light is projected onto the light guide microstructures 1423 , the light guide microstructures 1423 will destroy the total internal reflection condition, so that the light is emitted from the second surface 1424 . the

The diffusion film 146 is disposed on the light guide plate 142 , and a plurality of semicircular diffusion points 1462 are formed on an upper surface 1460 of the diffusion film 146 . The light emitted from the light guide plate 142 and transmitted to the diffusion film 146 is diffusely reflected by the diffusion points 1462 to generate a surface light source with uniform brightness distribution and achieve the effects of brightness enhancement and light adjustment. the

There is also at least one first adhesive member 154 between the diffusion film 146 and the light guide plate 142 , and the first adhesive member 154 can be double-sided tape. The number of the first adhesive parts 154 can be one or more. In this embodiment, the backlight module 14 includes two first adhesive parts 154 as an example for illustration; the first adhesive parts 154 are respectively arranged on the guide The second surface 1424 of the light board 142 is located at two edges of the second surface in the short direction (as shown in FIG. 1 ). the

The brightness enhancement film 148 is disposed on the diffusion film 146, and an upper surface 1480 of the brightness enhancement film 148 is formed with a plurality of V-shaped protrusions 1482, which are used to gather light and emit light so that the light converges on the user's body. Viewing direction (i.e. spotlight at positive angle). the

A second adhesive member 156 is further included between the brightness enhancement film 148 and the diffuser film 146 , and the second adhesive member 156 can be double-sided tape. The number of the second adhesive parts 156 can be one or more. In this embodiment, the backlight module 14 has included two second adhesive parts 154 as an illustrative example; the setting positions of the second adhesive parts 154 roughly correspond to The disposition positions of the first adhesive parts 154 (as shown in FIG. 1 ). the

As shown in FIGS. 1 and 5 , the shading sheet 150 is roughly L-shaped, and is located at one end of the light guide plate 142 having the light incident surface 1420 ; the shading sheet 150 covers the light emitting diodes 144 and partially covers the second surface. 1424 , used to prevent the light emitted by the light emitting diodes 144 but not incident on the light guide plate 142 from affecting the uniformity of light emitted by the backlight module 14 . the

As shown in Figures 1 and 4, the positioning frame 16 is made of resin material, and preferably, the positioning frame 16 is white or other colors with reflective effects, so as to prevent the positioning frame 16 from absorbing the light from the backlight module. 14 shot rays. The positioning frame 16 includes a pressing plate 160 and a plurality of positioning posts 162 located at the bottom edge of the pressing plate 160 . The positioning posts 162 are inserted into the through holes 122 of the circuit board 12 to achieve a positioning effect. The pressing plate 160 presses the light guide plate 142, the diffusion film 146 and the brightness enhancement film 148 and is positioned to prevent the backlight module 14 from causing the light guide plate 142, the diffusion film 146 and the brightness enhancement film The bright film 148 is displaced or damaged. Secondly, the top edge of the trigger plate 160 has a plurality of retaining walls 164 . the

The liquid crystal display layer 18 is disposed on the positioning frame 16 and located within the retaining walls 164 to prevent the liquid crystal display layer 18 from being displaced or damaged during the running of the vehicle. The liquid crystal display layer 18 has a viewable area 180 for displaying input images. the

The fixing frame 20 is made of metal, such as iron. The fixed frame 20 covers the liquid crystal display layer 18 and exposes the visible area 180 so that the visible area 180 can display images outside. The fixing frame 20 includes a plurality of hooks 200, and the hooks 200 extend through the through grooves 120 of the circuit board 12, and abut against the lower surface of the circuit board 12 after rotating at an angle, so as to fasten and press The liquid crystal display layer 18, the fixed frame 20 and the backlight module 14 are locked to prevent the liquid crystal display layer 18, the fixed frame 20 and the backlight module 14 from being displaced or damaged during the operation of the vehicle. the

Based on the above, the fixing frame 20 of the vehicle display device 10 of the present invention is combined with the circuit board 12 to fix the backlight module 14, the positioning frame 16 and the liquid crystal display layer 18, and use the connecting member 152 to combine the The circuit board 12 and the reflection sheet 140, the first adhesive member 154 are combined with the light guide plate 142 and the diffusion film 146, and the second adhesive member 156 is combined with the diffusion film 146 and the brightness enhancement film 148 to enhance the vehicle display The overall shock resistance of the device 10 can be improved, and the backlight module 14, the positioning frame 16 and the liquid crystal display layer 18 can be prevented from being displaced or damaged when the vehicle is running. the

As shown in Fig. 7, Fig. 8 and Fig. 9, it is a three-dimensional exploded view, a three-dimensional assembled view and a front view of the audio-visual system for a vehicle of the present invention. The car audio-visual system 1 includes a car display device 10 , a housing 30 and a plurality of panels 302 . The vehicle display device 10 is installed on a vehicle, as shown in FIG. 10 . The casing 30 is disposed on the vehicle display device 10 and has an opening 300 . The visible area 180 of the liquid crystal display layer 18 displays an image through the opening 300 . The panels 302 are arranged on the casing 30 and roughly correspond to the electronic components 22, so that the user can press or rotate each of the panels 302 to drive the electronic components 22 to achieve the signal input effect, and then Control the audio-visual system 1 for the car. In actual implementation, the vehicle display device 10 is also applied to other vehicle instruments, such as the vehicle air conditioner or the satellite navigation system built in the vehicle body, so as to achieve the image display effect. the

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims. the

Claims (1)

1. a Vehicular display device, is characterized in that, comprises:

One circuit board has plural number and wears groove;

One backlight module is arranged on this circuit board, and this backlight module comprises a light guide plate and plural light emitting diode;

This light guide plate comprises an incidence surface;

This plural number light emitting diode is electrically connected at this circuit board, and emits beam towards this incidence surface;

One posting comprises one and presses plate, presses this backlight module;

One liquid crystal display layer has a visible area, and this liquid crystal display layer is arranged on this posting; And

One fixed frame covers this liquid crystal display layer and exposes this visible area, and this fixed frame has plural grab, and these grabs stretch through, and these wear groove, and are connected to this circuit board after rotating an angle, fix this backlight module, this posting and this liquid crystal display layer.

2. Vehicular display device as claimed in claim 1, is characterized in that, wherein this backlight module also comprises a reflector plate, is arranged between this circuit board and this light guide plate.

3. Vehicular display device as claimed in claim 2, is characterized in that, wherein this backlight module also comprises a conjunction, is arranged between this circuit board and this reflector plate and in conjunction with this reflector plate and this circuit board.

4. Vehicular display device as claimed in claim 3, is characterized in that, wherein this conjunction is glue or double faced adhesive tape.

5. Vehicular display device as claimed in claim 1, is characterized in that, wherein this backlight module also comprises:

One diffusion barrier is arranged on this light guide plate;

One brightness enhancement film is arranged on this diffusion barrier;

2 first stick together part, are positioned at two edges of this light guide plate and in conjunction with this light guide plate and this diffusion barrier; And

2 second stick together part, are positioned at two edges of this diffusion barrier and in conjunction with this diffusion barrier and this brightness enhancement film, and wherein these second setting positions that stick together part are aligned in these the first setting positions that sticks together part.

6. Vehicular display device as claimed in claim 5, is characterized in that, wherein a upper surface of this diffusion barrier is formed with the diffusion point that plural number is semicircle shape.

7. Vehicular display device as claimed in claim 5, is characterized in that, wherein a upper surface of this brightness enhancement film is formed with the V-shaped protuberance of plural number.

8. Vehicular display device as claimed in claim 5, is characterized in that, wherein this first sticks together part and this second and stick together part and be respectively double faced adhesive tape.

9. Vehicular display device as claimed in claim 1, it is characterized in that, wherein this light guide plate also comprises a first surface and in contrast to a second surface of this first surface, this first surface and this second surface are adjacent to respectively this incidence surface, this first surface has plural leaded light microstructure, and these leaded light microstructures are V-shaped.

10. Vehicular display device as claimed in claim 9, is characterized in that, also comprises a shading piece, is positioned at the end that this light guide plate has this incidence surface, and this shading piece covers these light emitting diodes and this second surface of partial coverage.

11. Vehicular display device as claimed in claim 1 is characterized in that, wherein this light emitting diode is the lateral type light emitting diode.

12. Vehicular display device as claimed in claim 1 is characterized in that, wherein the apical margin of this posting is formed with plural barricade, and this liquid crystal display layer is positioned at those barricades.

13. Vehicular display device as claimed in claim 1 is characterized in that, wherein this circuit board has plurality of through holes, and this bottom that presses plate has plural reference column, and those reference columns are inserted in those perforation.

14. a vehicle video-audio system is characterized in that, comprises:

Claim 1 described Vehicular display device of any one to the claim 13;

The plural number switch module is arranged at this circuit board and is electrically connected at this circuit board; And

One housing is installed on this circuit board, and has a perforate, and this visible area of this liquid crystal display layer is exposed to this perforate;

The plural number panel is arranged on this housing and corresponding to those switch modules.

Images