CN102314805B - Flat panel display and method of assembling flat panel display - Google Patents

Abstract

The invention discloses a special positioning structure of a television front frame of a flat panel display, or a fixed frame, so that a liquid crystal unit can be positioned by the television front frame during assembly and assembled along a single assembly direction, and optical and clamping spaces required by the liquid crystal unit are kept. The optical film, the light guide element, the backlight element and the reflector (the backlight element and/or the reflector can be locked on the back cover of the backlight module in advance) in the flat panel display are sequentially assembled on the fixed frame or the front frame of the television along the same assembling direction. Finally, the loudspeaker, the wire, the machine board (including a control circuit board and a power supply circuit board), the machine board rear cover and the like are assembled on the front frame and the back cover.

Description

Flat panel display and method of assembling flat panel display

technical field

The present invention relates to a flat display and an assembly method, in particular to a flat display capable of assembling components along a single direction and an assembly method for assembling the flat display.

Background technique

At present, the assembly of flat-screen TVs is mainly divided into three stages: backlight module (backlight unit) assembly, liquid crystal module (LCM unit) assembly and final TV assembly. After the backlight components are assembled in the backlight module factory and components such as optical film material and light guide plate are added, the backlight module is then transported to the panel factory for assembly of liquid crystal modules. Due to the requirements of the assembly method, the panel factory needs to add liquid crystal glass (cell) on the backlight module with the display facing up (there are many positioning structures on the front frame of the backlight module to position the liquid crystal glass), and then lock Put the metal front frame of the liquid crystal module, and then turn over the semi-finished product of the liquid crystal module to lock and fix the back plate of the liquid crystal module to complete the assembly of the liquid crystal module. The assembled LCD module must be turned over again until the display side faces up, and the TV factory will combine the LCD module with the front frame of the TV, then turn over the back cover of the LCD module again to lock the components such as the board and the back cover of the TV, and finally assemble the support base To complete the machine assembly.

Since the components of the flat-screen TV must be turned over during the assembly process of the liquid crystal module and the whole TV set, under the trend of the development of flat-screen TVs to large sizes, this assembly process that requires turning over the TV will inevitably increase the demand for manpower and increased difficulty in assembly. In addition, the traditional three-stage assembly process is too lengthy, causing bottlenecks in production hours and capacity.

Contents of the invention

The invention discloses a plane display, which comprises a front frame, a panel unit, a fixed frame, a plurality of optical films, a backlight element and a back cover. The front frame includes a first positioning element. The panel unit is assembled between the first positioning elements of the front frame. The fixed frame is assembled on the first positioning element of the front frame, and the fixed frame has at least one arm. The optical film is placed on one side of the at least one arm of the fixing frame, and the at least one arm is disposed between the panel unit and the plurality of optical films. The backlight element is locked on the back cover, and the back cover and the backlight element are locked on the fixing frame.

The present invention also discloses a method for assembling a flat-panel display, which includes the steps of: assembling a panel unit between the first positioning elements of a front frame along an installation direction; assembling a fixed frame on the first positioning element along the installation direction On the first positioning element of the front frame; a plurality of optical films are placed on one side of at least one arm of the fixed frame along the installation direction, and the at least one arm is arranged on the panel unit and the between the plurality of optical films; and locking a back cover containing a backlight element on the fixing frame along the installation direction.

Utilizing the flat-panel display and the method for assembling the flat-panel display disclosed in the present invention, in the flow of flat-panel display assembly, the three stages of backlight module assembly, liquid crystal module assembly, and final TV assembly are directly integrated. There is no need to turn over during the process, so that the production line can be effectively shortened, the production efficiency can be improved, and the parts required for the flat-panel display can be simplified to reduce the production cost.

Description of drawings

1 to 4 are schematic diagrams illustrating the assembly of the first embodiment of the flat panel display of the present invention.

5 to 7 are schematic diagrams illustrating the assembly of the second embodiment of the flat panel display of the present invention.

8 to 12 are schematic diagrams illustrating the assembly of the third embodiment of the flat panel display of the present invention.

13 to 15 are schematic diagrams showing the assembly of the fourth embodiment of the flat panel display of the present invention.

FIG. 16 is a flow chart of the first embodiment of the assembly method of the flat panel display of the present invention.

FIG. 17 is a flow chart of the second embodiment of the assembly method of the flat panel display of the present invention.

Wherein, the reference signs are explained as follows:

100, 200, 300, flat panel display 10, 40, 70 front frame

400

11, 41, 71 First positioning element 12, 42, 72 Shading pad

13, 43, 51, 73 Buffer pad 14 Second engaging part

20, 50 Panel unit 31, 61 Optical film

32 Fixed frame 33, 33’, 63, backlight element

63’

34, 64 Back cover 35, 65 Reflector

36 Arm 37 First engagement part

38, 68 Light guide element 44, 74 Second positioning element

62 Fixed part 75 Third positioning element

500, 600 Assembly method 502～512, steps

602～610

Detailed ways

Please refer to FIG. 1 to FIG. 4 , which are schematic cross-sectional views of a flat panel display 100 and its assembly disclosed in the first embodiment of the present invention. As shown in Figures 1 to 4, the flat panel display 100 uses the special structure provided by the present invention to cooperate with the improved assembly process, so that the assembly of the flat panel display 100 does not need to be flipped, and the three stages of the original TV industry manufacturing are directly integrated, so that Effectively shorten the production line and improve production efficiency. In FIG. 4 , the flat-panel display 100 is assembled in such a way that the display surface (ie, the panel unit 20 in the drawing) faces downward—that is, the direction L1 in the drawing—that the flat-panel display 100 includes a TV front frame 10, a Panel unit 20 (cell), a fixed frame 32, a plurality of optical films 31, a backlight element 33, a reflective sheet 35, a back cover 34, and speakers, wires, machine boards (including control circuit boards, power supply circuit boards ), etc., wherein the speakers, wires and board (and the back cover of the board) are not shown in the figure, and the way of assembly can also be easily understood and implemented by those skilled in the art, and will not be repeated here.

In FIGS. 1 to 4 , the assembly components of the flat-panel display 100 are sequentially assembled along a downward installation direction (L ₁ direction), so as to simplify the assembly steps and improve the assembly efficiency. In Fig. 1, the front frame 10 is first placed in a face-down manner, and the inner side of the front frame 10 has a first positioning element 11, wherein the positioning element 11 can be a stopper extending around the front frame 10 or otherwise fixed on Locating bolts, screws, latches, etc. on the front frame 10. It should be noted here that FIG. 1 (and the drawings of each embodiment) only shows a schematic side view of one side of the flat-panel display 100 , and the opposite side also has the same structure and is not shown. The span of the first positioning element 11 along the horizontal direction D ₁ D ₂ in the figure can accommodate the panel unit 20 . Therefore, in Fig. 1, the panel unit 20 is assembled between the first positioning elements 11 of the front frame 10 along the _L1 direction, and between the panel unit 20 and the front frame 10, another buffer pad 13 (preferably pre-adhered on the front frame 10, or pre-adhered on the panel unit 20), when the panel unit 20 is assembled on the front frame 10 along the _L1 direction, the buffer pad 13 can provide a cushioning effect to prevent the panel unit 20 from colliding with the front frame 10. Damage due to impact. There is also a shading pad 12 on the front frame 10, which can prevent light leakage from the sides of the display and improve the output quality of the picture.

Next in Fig. 2, the fixed frame 32 is assembled on the front frame 10 along the direction _L1 (in this embodiment, it is assembled on the first positioning element 11 more specifically), since the fixed frame 32 is horizontally opposite to each other It has a larger span than the first positioning element 11 , so it can be placed on the first positioning element 11 and maintain a fixed distance from the panel unit 20 below. There is a first engaging part 37 (a card slot in this embodiment) around the fixed frame 32, which can be connected to a second engaging part 14 (a card slot in this embodiment) at a corresponding position around the front frame 10. hook), so that the fixed frame 32 is fixed on the front frame 10. After the fixing frame 32 is assembled on the front frame 10, the fixing frame 32 can provide sufficient support for other components placed thereon, and give the required space on the optical structure. Next, the plurality of optical films 31 are directly placed on the arm portion 36 of the fixing frame 32 along the direction L ₁ .

In Fig. 3, the backlight element 33 (here is a direct-type light-emitting diode) and the reflector 35 are pre-locked on the back cover 34, and then as shown in Fig. It is locked on the fixed frame 32 along the _L1 direction. Finally, in the same direction as shown in Figure 4 (that is, the display surface of the panel unit 20 faces downward in the _L1 direction), the speaker, wires, and board (and the back cover of the board) are combined with the front frame 10 and the back cover 34 (on the figure not shown), thus completing the process of assembling the flat panel display 100 along a single installation direction.

Please refer to FIG. 5 to FIG. 7 , which are schematic cross-sectional views of the flat panel display 200 and its assembly disclosed in the second embodiment of the present invention. In the flat panel display application of the direct-lit backlight module, FIGS. 5 to 7 provide another design and assembly method of the front frame. As shown in Figure 5, the first positioning element 41, the panel unit 50, the buffer pad 43 and the light-shielding pad 42 of the front frame 40 of the flat-panel display 200 are similar to the aforementioned first embodiment, and the front frame 40 has a second inner side in addition. Two positioning elements 44 . As shown in the drawings, the first positioning element 41 and the second positioning element 44 are arranged in a ladder shape along the direction L ₂ (that is, the direction opposite to the installation direction L ₁ ), and the distance between the second positioning elements 44 is along the direction D ₁ D ₂ The span in the horizontal direction is larger than the span between the first positioning elements ₄₁ , so in FIG. It is placed on the first positioning element 41 , so there is a space required for the optical structure between the panel unit 50 and the panel unit 50 . Another buffer pad 51 can be provided between the panel unit 50 and the optical film 61, and the panel unit 50 can provide effective collision protection for the panel unit 50 by means of the buffer pads 43 and 51 respectively arranged on both sides along _{the L1L2} direction. . A plurality of optical films 61 are fixed on the first positioning element 41 by a fixing member 62 .

Next, in FIG. 7, the back cover 64, reflector 65, and backlight element 63 are similar to those of the first embodiment. After being assembled and fixed, the back cover 64 is locked on the front frame 40 along the _L1 direction (in this implementation For example, it is more specifically locked on the second positioning element 44).

Please refer to FIG. 8 to FIG. 12 , which are schematic cross-sectional views of the flat panel display 300 and its assembly disclosed in the third embodiment of the present invention. In addition to the above-mentioned direct type light-emitting diode backlight elements 33, 63, when the flat panel display uses an edge type backlight element, as shown in the third embodiment, the same elements and assembly stages as in the first embodiment (Fig. 8 and Figure 9) will not be repeated here. In FIG. 10, after the optical film 31 is placed along the _L1 direction, the light guide element 38 and the reflective sheet 35 matched with the edge-lit backlight element 33' are placed on multiple optical films in sequence along the _L1 direction. Sheet 31 on. Then lock the side-lit backlight element 33' on the back cover 34. In this embodiment, the side-lit backlight element 33' is a side-emitting light-emitting diode, which can be single-sided light incident, double-sided light incident, or as shown in the figure. 11 (which is a schematic diagram of the back cover 34 for locking the backlight element 33 ′) is light incident from four sides. Next, in FIG. 12 , the back cover 34 is locked on the fixed frame 32 (or directly locked on the front frame 10 ), and in the assembly process at this stage, the backlight element 33 ′ is directly embedded in an appropriate opening of the fixed frame 32 . The hole is configured as a side-emitting light source.

Please refer to FIG. 13 to FIG. 15 , which are schematic cross-sectional views of a flat panel display 400 and its assembly disclosed in the fourth embodiment of the present invention. In the fourth embodiment, a flat panel display 400 with an edge-lit backlight element, wherein the structure of the front frame 70 of the display (the first positioning element 71, the second positioning element 74), the panel unit 50, the buffer pads 73, 51, The shading pad 72 , the plurality of optical films 61 and the assembly method ( FIG. 13 and FIG. 14 ) are similar to those of the aforementioned second embodiment, and will not be repeated here. The front frame 70 of the fourth embodiment has a third positioning element 75 in addition, wherein the first positioning element 71, the second positioning element 74 and the third positioning element 75 can be blocks extending around the front frame 70, or otherwise fixed on Positioning bolts, screws, latches, etc. arranged at different positions along the front frame 70 along the L ₁ L ₂ direction. In this embodiment, the first positioning element 71, the second positioning element 74, and the third positioning element 75 are arranged in a ladder shape along the _L2 direction (ie, the direction opposite to the installation direction _L1 ), and the third positioning element The span between 75 along the horizontal direction of D ₁ D ₂ is larger than the span between the second positioning elements 74, so in _FIG . The plurality of optical films 61 (the figure further shows that they are placed on the second positioning element 74 , that is, between the third positioning elements 75 ), so there is an appropriate optical space with the optical film 61 . Then the back cover 34 is locked on the front frame 70 (in this embodiment, it is more specifically locked on the third positioning element 75), and in the assembly process at this stage, the backlight element 63' is directly embedded in the first positioning element. The appropriate openings of the three positioning elements 75 are used as the configuration of the side-emitting light source.

Next, please refer to FIG. 16 and FIG. 17 , which are schematic flowcharts of an assembly method for assembling a flat-panel display according to the present invention. In FIG. 16, the assembly method 500 includes the following steps:

Step 502: Place a front frame of the flat panel display downward along an installation direction.

Step 504: Assemble a panel unit between the first positioning elements of the front frame along the installation direction.

Step 506: Assemble a fixed frame on the first positioning element of the front frame along the installation direction. Wherein the fixed frame utilizes a first engaging portion to engage with a second engaging portion of the front frame to be assembled on the first positioning element of the front frame.

Step 508: Place a plurality of optical films on the fixed frame along the installation direction. In an embodiment with side-emitting backlight elements, a light guide element and a reflective sheet are sequentially placed on a plurality of optical films.

Step 510: Lock a back cover including a backlight element on the fixing frame along the installation direction. In an embodiment with a direct-type backlight unit, a reflector is locked on the back cover together with the backlight unit. In the embodiment with side-emitting backlight elements, the backlight elements in this step are embedded in the fixed frame.

Step 512: Assemble speakers, wires, boards (including control circuit boards, power circuit boards) and board rear covers on the front frame and the back cover, and assemble the support base of the flat-panel display.

In FIG. 17, the assembly method 600 includes the following steps:

Step 602: Place a front frame of the flat-panel display downward along an installation direction.

Step 604: Assemble a panel unit between the first positioning elements of the front frame along the installation direction.

Step 606: Lock a plurality of optical films between the second positioning elements of the front frame along the installation direction. In an embodiment with side-emitting backlight elements, a light guide element and a reflective sheet are sequentially placed on the plurality of optical films.

Step 608: Lock a back cover including a backlight element on the second positioning element along the installation direction. In an embodiment with a direct backlight unit, a reflective sheet is secured to the back cover together with the backlight unit. In the embodiment with side-emitting backlight elements, the back cover in this step is locked on the third positioning element on the second positioning element, and the backlight element is embedded in the third positioning element of the front frame.

Step 610: Assemble speakers, wires, boards (including control circuit boards, power circuit boards) and board rear covers on the front frame and the back cover, and assemble the support base of the flat-panel display.

Utilizing the flat-panel display assembly method and the corresponding flat-panel display structure disclosed in the present invention can remove the overturning steps required for traditional liquid crystal module assembly and the metal frame that fixes the liquid crystal module, so as to further reduce production costs, and reducing parts can also reduce product quality. overall thickness. Utilize the special positioning structure of the TV front frame of the flat-panel display, or cooperate with a fixed frame, so that the liquid crystal unit can be positioned by the TV front frame during assembly and assembled along a single assembly direction, and maintain the optical and clamping space required by the liquid crystal unit . In the flat panel display, the optical film, light guide element, backlight element and reflector (the backlight element and/or reflector can be locked on the back cover first) and then assembled on the fixed frame or TV along the same assembly direction in sequence. on the front frame. Finally, the loudspeaker, the wire, the board (including the control circuit board, the power circuit board) and the back cover of the machine board are assembled on the front frame and the back cover, and the supporting base is assembled.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (13)

1. A flat panel display, characterized in that, said flat panel display includes: The front frame includes a first positioning element; a panel unit assembled between the first positioning elements of the front frame; a fixed frame, assembled on the first positioning element of the front frame, the fixed frame has at least one arm; A plurality of optical films placed on one side of the at least one arm of the fixed frame, the at least one arm is disposed between the panel unit and the plurality of optical films; backlight elements; and The back cover, the backlight element is locked on the back cover, and the back cover and the backlight element are locked on the fixed frame. 2. The flat panel display according to claim 1, wherein the fixed frame has a first engaging portion, the front frame has a second engaging portion, and is engaged with the first engaging portion, The fixing frame is assembled on the first positioning element of the front frame. 3. The flat-panel display according to claim 1, wherein the backlight element is a direct light-emitting diode, and the flat-panel display further comprises a reflective sheet, which is locked together with the backlight element on the back cover . 4. The flat panel display according to claim 1, characterized in that, the flat panel display further comprises a light guide element and a reflective sheet placed on the optical film. 5. The flat panel display according to claim 4, wherein the backlight element is a side-emitting light emitting diode, and the backlight element is embedded in the fixed frame. 6. The flat panel display according to claim 1, further comprising a buffer pad disposed between the panel unit and the front frame. 7. A method for assembling a flat panel display, characterized in that the method comprises the steps of: Assembling a panel unit between first positioning elements of a front frame along an installation direction; Assembling a fixed frame on the first positioning element of the front frame along the installation direction; placing a plurality of optical films on one side of at least one arm of the fixed frame along the installation direction, the at least one arm is disposed between the panel unit and the plurality of optical films; as well as A back cover containing a backlight element is locked on the fixing frame along the installation direction. 8. The method according to claim 7, wherein assembling a fixed frame on the first positioning element of the front frame along the installation direction comprises the step of: placing a first clip of the fixed frame The engaging portion is engaged with a second engaging portion of the front frame so that the fixed frame is assembled on the first positioning element of the front frame along the installation direction. 9. The method according to claim 7, further comprising the step of: fixing a reflective sheet and the backlight element on the back cover. 10. The method according to claim 7, further comprising the step of: placing a light guide element and a reflective sheet on the optical film along the installation direction. 11. The method according to claim 10, further comprising the step of: locking the backlight element on the back cover. 12. The method according to claim 7, wherein locking a back cover containing a backlight element on the fixing frame along the installation direction comprises the step of: inserting the backlight element into the fixing frame. within the frame. 13. The method of claim 7, further comprising the step of disposing a cushion between the panel unit and the front frame.