WO2014153867A1

WO2014153867A1 - Backlight module for experiment

Info

Publication number: WO2014153867A1
Application number: PCT/CN2013/077541
Authority: WO
Inventors: 王飞; 布占场; 袁静
Original assignee: 京东方科技集团股份有限公司; 北京京东方显示技术有限公司
Priority date: 2013-03-25
Filing date: 2013-06-20
Publication date: 2014-10-02
Also published as: CN103206647B; CN103206647A

Abstract

A backlight module for an experiment comprises a backpanel (1), a plastic frame (2a-2d) provided on the backpanel (1), and a disassemblable connection structure for connecting the backpanel and the plastic frame. There are four plastic frames, each plastic frame is an elongated shape, an area enclosed by the four plastic frames is a rectangle, and at least one of the four plastic frames can be shifted on the backpanel by using the disassemblable connection structure.

Description

Experimental backlight module

Embodiments of the present invention relate to an experimental backlight module. Background technique

Due to its small size, low power consumption and low radiation, liquid crystal displays have dominated the current flat panel display market. In the liquid crystal display, since the liquid crystal itself does not emit light, it only regulates the light. In order to display an image on the screen of the liquid crystal display, a backlight module (BLU, Back Light Unit) needs to be disposed for the display panel (Panel). Different sizes of backlight modules are required for different sizes of display panels.

Before the large-scale production of the designed backlight module, relevant experiments are needed to verify whether the backlight module can meet the requirements. For example, verify that the structure and material design of the backlight module meet the specifications, and the brightness of the backlight module. Whether the uniformity satisfies the backlight requirement, whether the display quality of the display panel after the backlight module and the display panel are assembled satisfies the quality requirements. Therefore, in general, manual samples (ie, experimental backlight modules) need to be processed to complete the relevant experiments. However, if the manual module is processed for each type (size) of the backlight module, the processing cycle is long and the processing cost is high, so that the overall development cost of the display is also high. SUMMARY OF THE INVENTION An experimental backlight module capable of shortening a processing cycle and reducing a processing cost.

The technical solution adopted to solve the technical problem of the present invention:

The experimental backlight module includes a backboard, a plastic frame disposed on the backboard, and a detachable connecting structure for connecting the backboard and the plastic frame, wherein the plastic frame is elongated and adopts four The area enclosed by the four plastic frames on the backboard is rectangular, and the position of at least one of the four plastic frames on the backboard can be moved by the detachable connection structure.

Preferably, the back plate is provided with m parallel strip-shaped holes, and n parallel to each other outside the strip-shaped holes in the direction perpendicular to the m strip-shaped holes of a strip hole, wherein the n strip holes are respectively disposed perpendicular to the m strip holes;

The four plastic frames are connected to the backboard through the detachable connecting structure, and the four plastic frames are the first plastic frame, and the second plastic frame and the third rubber respectively disposed perpendicularly to the m strip holes. a frame, and a fourth plastic frame disposed perpendicularly to the n strip holes; the position of the first plastic frame on the back plate is fixed on the back plate by the detachable connection structure, the second plastic frame and The position of the third plastic frame on the back plate can be moved along the length direction of the m strip holes through the detachable connection structure, and the position of the fourth plastic frame on the back plate can be through the detachable connection The structure moves along the length of the n strip holes, wherein m, n are positive integers greater than or equal to 1.

Preferably, said m = 2, n = 2.

Preferably, the detachable connecting structure for connecting the first plastic frame and the backboard is a fastener structure or a snap-fit slot structure; and the second plastic frame, the third plastic frame and the fourth plastic frame are respectively The detachable connection structure of the backboard connection is a fastener structure.

Preferably, the fastener structure is at least one of a bolt and nut structure, a stud nut structure, and a screw nut structure.

Preferably, the backlight module further includes a light guide plate and a light source; the light guide plate is disposed on the back plate and a rectangular area surrounded by the four plastic frames, and the light source is disposed on the four plastic frames Between at least one of the plastic frames and the corresponding side of the light guide plate.

Preferably, each of the plastic frames is in the shape of an L-shaped plate, and includes horizontal portions and vertical portions perpendicular to each other, the vertical portions are disposed perpendicular to the back plate, and the horizontal portion extends and extends toward the direction of the light guide plate. To the edge of the light-emitting surface of the light guide plate.

Preferably, the light source comprises at least one sub-light source and a printed circuit board electrically connected to the at least one sub-light source; the board surface of the printed circuit board is disposed in parallel with the light incident surface of the light guide plate.

Preferably, a strip hole is disposed at a position corresponding to the printed circuit board on the back plate, and the strip hole is disposed in parallel with the light incident surface of the light guide plate, the length of which is greater than the length of the printed circuit board, and the width is larger than the printed circuit The thickness of the board.

Preferably, the backlight module further includes at least one elongated strip, each of the strips being disposed between the plastic frame and the back plate, wherein the baffle is used for fixing the plastic frame to the back plate.

Preferably, the baffle adopts four, each baffle has an L-shaped plate shape, and includes horizontal and vertical portions perpendicular to each other, and the horizontal portion of the baffle is disposed on the back plate and the corresponding plastic frame Between the vertical portions, the vertical portion of the dam is disposed perpendicular to the horizontal portion of the corresponding plastic frame, and the printed circuit board is fixed at Corresponding to the outer side of the vertical portion of the crosspiece;

The detachable connection structure is used to connect the backboard, the plastic frame and the dam.

Preferably, the backlight module further includes a support layer for adjusting a height of the light guide plate in a direction perpendicular to the back plate, and the support layer is disposed between the back plate and the light guide plate. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, rather than to the present invention. limit.

1 is a top plan view of an experimental backlight module according to Embodiment 3 of the present invention;

Figure 2 is a plan view of the back plate of Figure 1;

Figure 3 is a cross-sectional view taken along line A-A of Figure 1;

Figure 4 is a cross-sectional view taken along line B-B of Figure 1;

5 is a cross-sectional view of the A-A of the experimental backlight module according to Embodiment 4 of the present invention;

Figure 6 is a cross-sectional view of the B-B of the experimental backlight module according to Embodiment 4 of the present invention. The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

Embodiments of the present invention provide an experimental backlight module including a backboard, a plastic frame, and a detachable connection structure.

The detachable connection structure is used to connect the backboard and the plastic frame together.

The plastic frame is in the shape of a strip and four are used. The four plastic frames are disposed on the back plate, and the four plastic frames are rectangular on the back plate, and at least one of the four plastic frames. The position of the plastic frame on the backboard can be moved by the detachable connection structure.

For example, the detachable connecting structure adopts a snap-in card slot structure, and a plurality of sets of buckles or card slots can be respectively disposed on the backboard in a direction perpendicular to the plastic frame that needs to be moved at each position (adjacent sets of buckles or The spacing between the card slots and the specific position of each group of buckles or card slots can be set according to the size of the experimental backlight module, and a set of card slots or buckles are arranged on the plastic frame where the position needs to be moved, wherein each The group includes at least one buckle or a card slot, and the buckle or the card slot in each group is arranged along the length direction of the plastic frame that needs to be moved at the position or in a direction parallel to the length direction, and the backlight module can be used according to the experiment. The required size of the group is such that a set of card slots or buckles on the plastic frame that needs to be moved are respectively connected with a set of buckles or card slots at appropriate positions on the backboard, thereby adjusting the corresponding plastic frame on the backboard. position;

Alternatively, the detachable connection structure adopts a bolt-and-nut structure, and a plurality of sets of via holes can be respectively disposed on the backboard in a direction perpendicular to the plastic frame that needs to be moved at each position (the spacing between adjacent two sets of via holes and each The specific position of the set of via holes may be set according to the size of the experimental backlight module), and a set of via holes are arranged on the plastic frame where the position needs to be moved, wherein each set of via holes includes at least one via hole, and the above via holes The sizes are the same, and the via holes in each group are arranged along the length direction of the plastic frame that needs to be moved at the position or in the direction parallel to the length direction, so that the position needs to be moved according to the size required for the experimental backlight module. The set of vias on the frame are combined with a set of vias at appropriate locations on the backplane and secured by bolts and nuts to adjust the position of the corresponding bezel on the backplane.

With the above structure, since the backlight module has a positionally movable plastic frame, it is not necessary to repeatedly make the back plate and some or all of the plastic frame when performing experiments on different size backlight modules, and only need to re-create other components. It saves processing costs and shortens the processing cycle.

Preferably, the back plate may be provided with m parallel strip-shaped holes, and n mutually outside the strip-shaped holes located in the outermost or second outer side in the direction perpendicular to the m strip-shaped holes. Parallel strip holes, the n strip holes are respectively disposed perpendicular to the m strip holes;

With the above structure, the positions of the second to fourth plastic frames in the four plastic frames can be moved on the back plate. The four plastic frames and the back plate can be reused from an achievable point of view. However, from the perspective of better application of the effect, the following conditions must be met: The four plastic frames are perpendicular to the back plate. The thickness of the direction should be the same. No matter how the second to fourth frames are moved, the areas enclosed by the four plastic frames on the back plate need to be kept in a closed rectangle, and the four plastic frames are in contact with each other. In order to satisfy the above conditions, the lengths of the first to third frames must be designed to be long, the length of the fourth frame should be designed to be short, and a short side of the second and third frames Both are in contact with one long side of the first plastic frame, and the two short sides of the fourth plastic frame are respectively in contact with one long side of the second and third plastic frames (see the structure shown in FIG. 1), and The area enclosed by the four plastic frames on the back plate is always kept in a closed rectangle, and the first to third plastic frames can be reused, and the length of the fourth plastic frame is required to be in accordance with the second and third plastic frames. The distance between them is redesigned, that is, the fourth frame is not reusable.

Wherein, the fastener is a general term for a type of mechanical parts used when fastening two or more parts (or members) into one unit.

Preferably, the fastener structure is at least one of a bolt and nut structure, a stud nut structure, and a screw nut structure. Of course, the fastener structure may also include auxiliary parts such as gaskets.

The embodiment of the present invention is described in detail below with reference to the accompanying drawings. As shown in FIG. 1-4, the embodiment provides an experimental backlight module, including a backboard 1, a plastic frame, an optical film layer 4, and a light guide plate 5. The reflective layer 6, the support layer 7, the light source and the detachable connection structure. In the illustrated embodiment, the detachable connection structure employs a bolt and nut structure including a bolt 10 and a nut 11.

The back plate 1 is provided with two mutually parallel strip-shaped holes, which are respectively a first strip-shaped hole la and a second strip-shaped hole lb, and are located at the outermost side in a direction perpendicular to the two strip-shaped holes Or the outer two outer strip holes (such as the side of the first strip hole la away from the second strip hole lb, or between the first strip hole la and the second strip hole lb) The strip-shaped holes parallel to each other are a fourth strip-shaped hole Id and a fifth strip-shaped hole le, respectively, the first strip-shaped hole la and the second strip-shaped hole lb and the fourth strip-shaped hole Id and fifth, respectively The strip holes are arranged vertically.

The plastic frame is disposed on the back plate 1 , and the plastic frame is in the shape of a strip and four are used. The area of the four plastic frames on the back plate 1 is rectangular; the four plastic frames are a plastic frame 2a, a second plastic frame 2b and a third plastic frame 2c respectively disposed perpendicular to the first strip hole la and the second strip hole lb, and a fourth strip hole Id and a fifth strip hole a fourth plastic frame 2d disposed vertically; each of the plastic frames is provided with two through holes along a length thereof for mounting bolts and nuts for connection, so that the four Each of the plastic frames can be connected to the back plate 1 through a bolt and nut structure. Correspondingly, two through holes are also disposed on the back plate 1 at positions corresponding to the positions of the two through holes on the first plastic frame 2a. The first positioning hole If and the second positioning hole lg, respectively, the distance between the two through holes provided on the second plastic frame 2b and the third plastic frame 2c and the first strip hole la and the second strip shape The distance between the holes lb is the same. Preferably, the diameters of the two through holes provided on the second plastic frame 2b and the third plastic frame 2c are the same as the widths of the first strip hole la and the second strip hole lb, respectively. The distance between the two through holes provided on the fourth plastic frame 2d is the same as the distance between the fourth strip hole Id and the fifth strip hole le, and preferably the diameter of the two through holes provided on the fourth plastic frame The same as the width of the fourth strip hole Id and the fifth strip hole le; thus, the position of the first plastic frame 2a on the back plate 1 is fixed on the back plate 1 by a bolt and nut structure, the first The position of the second plastic frame 2b and the third plastic frame 2c on the back plate 1 can be moved along the length of the first strip hole la and the second strip hole lb by the bolt and nut structure. 2d a fourth position in the plastic housing of the backing plate 1 is movable along the longitudinal direction of the fourth and fifth rectangular hole Id le rectangular hole structure by bolts and nuts.

The light guide plate 5 is disposed on the back plate 1 and a rectangular area surrounded by the four plastic frames, and the light source is disposed between the first plastic frame 2a and the corresponding side of the light guide plate. Certainly, the number and position of the light source are not limited. For example, the light source may be disposed between one of the plastic frames and the corresponding side of the light guide plate, or the light source may be disposed at any two. Between the plastic frame and the corresponding side of the light guide plate, that is, the light source may be disposed between the at least one plastic frame of the four plastic frames and the corresponding side of the light guide plate.

The bottom of the light guide plate 5 (ie, the plate surface of the light guide plate near the back plate side) is provided with light guiding mesh points of different sizes and sizes, such as strips, triangles, dots or ellipsoids. The dot, the light incident from the side of the light guide plate (ie, the light incident surface of the light guide plate) to the bottom of the light guide plate is scattered by the bottom light guide dot to form a uniform surface light source and is emitted from the light exit surface of the light guide plate 5 (ie, the light guide plate is away from the back plate) The side of the board) is shot.

Each elongate plastic frame has an L-shaped plate shape (ie, an L-shape in a cross section perpendicular to its length direction), and includes horizontal and vertical portions perpendicular to each other, the vertical portion and the back plate The vertical setting limits the movement of the light guide plate in a direction perpendicular to the surface of the light guide plate.

It should be noted that the plastic frame in the embodiment of the present invention is not limited to the L-shaped plate shape, and may be stepped. The light guide plate and the optical film layer may be disposed together in one step or sequentially in different steps. In fact, the plastic frame can realize optical structure (light source, optical film, etc.) and back The fixed combination of the plates can be used, and is not limited herein.

The light source includes at least one sub-light source 9 and a printed circuit board 8 electrically connected to the at least one sub-light source, the board surface of the printed circuit board 8 is disposed in parallel with the light incident surface of the light guide plate 5, and the printed circuit board 8 is fixed to the inner side of the vertical portion of the first plastic frame 2a, that is, fixed to the inner side of the vertical portion of the corresponding plastic frame. A third strip hole lc is disposed on the back plate 1 corresponding to the printed circuit board, and the strip hole is disposed in parallel with the light incident surface of the light guide plate, the length of which is greater than the length of the printed circuit board, and the width is greater than the printing The thickness of the circuit board can be normally installed when the width of the printed circuit board in the direction parallel to the light incident surface of the light guide plate is wide, and the printed circuit board exceeding the specified size in the width direction can be removed from the third strip shape. Extending in the hole lc.

The optical film layer 4 is disposed on the light-emitting surface of the light guide plate; the reflective layer 6 is disposed at the bottom of the light guide plate (ie, the surface of the light guide plate near the side of the back plate); the support layer 7 is used to adjust the light guide plate 5 The height in the direction perpendicular to the backing plate 1 is disposed between the reflective layer 6 and the backing plate 1; the thickness of the supporting layer 7 can be adjusted according to actual needs, and the thickness of the supporting layer can be adjusted to adjust the light guiding plate and The distance between the backplanes is such that the relative position between the light guide and the light source in the backlight module of different models (sizes) remains unchanged.

Figures 5 and 6 illustrate another exemplary embodiment in accordance with the present invention. As shown in FIG. 5 and FIG. 6 (the top view of the backlight module of the present embodiment is the same as that of FIG. 1 , so the top view is not provided, only the AA cross-section and the BB cross-sectional view on FIG. 1 are provided), and the embodiment and the above implementation are provided. The difference between the examples is that the backlight module for the experiment further includes at least one elongated strip, each of the strips is disposed between a plastic frame and the back plate, and the baffle is used for fixing the plastic frame On the back panel.

Wherein, the baffle adopts four, which are a first baffle 3a, a second baffle 3b, a third baffle and a fourth baffle (not shown), and each baffle is disposed in a glue Between the frame and the back plate 1, that is, the first bar 3a is disposed between the first frame 2a and the back plate 1, and the second bar 3b is disposed between the second frame 2b and the back plate 1, the third gear The strip is disposed between the third frame 2c and the back plate 1, and the fourth bar is disposed between the fourth frame 2d and the back plate 1, that is, the first bar 3a corresponds to the first frame 2a, and the second The baffle 3b corresponds to the second plastic frame 2b, the third baffle corresponds to the third plastic frame 2c, and the fourth baffle corresponds to the fourth plastic frame 2d; each elongate baffle has an L-shaped plate shape, which includes mutually perpendicular a horizontal portion and a vertical portion, the horizontal portion of the baffle is disposed between the back plate 1 and the vertical portion of the corresponding plastic frame, the vertical portion of the baffle is perpendicular to the horizontal portion of the corresponding plastic frame, and The printed circuit board 8 is fixed on the outer side of the vertical portion of the first baffle 3a, that is, fixed on the outer side of the vertical portion of the corresponding baffle; Connect the back panel, plastic frame and the strip. In this embodiment, the function of the baffle is to make the corresponding plastic frame better fixed on the back plate.

Preferably, the baffle is made of metal.

Other structures and functions in this embodiment are the same as those in the above embodiment, and are not described herein again. In the experimental backlight module, since the position of at least one of the four plastic frames on the back plate can be moved through the detachable connection structure, the position of the plastic frame on the back plate can be adjusted. Used in different sizes of backlight modules. In other words, when the experiment is required for different size backlight modules, the back plate and some or all of the plastic frames can be reused, thereby saving the processing cost of the manual sample (ie, the experimental backlight module) and shortening the backlight mode. The processing cycle of the group reduces the overall development cost of the display.

It is to be understood that the above embodiments are merely illustrative embodiments employed to illustrate the principles of the invention, but the invention is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the invention. These modifications and improvements are also considered to be within the scope of the invention.

Claims

claims

1. An experimental backlight module, including a backplane, a plastic frame provided on the backplane, and a detachable connection structure for connecting the backplane and the plastic frame, wherein the plastic frame is long and Four plastic frames are used, and the area enclosed by the four plastic frames on the back plate is a rectangle. The position of at least one of the four plastic frames on the back plate can be moved through the detachable connection structure.

2. The backlight module according to claim 1, wherein,

The back plate is provided with m mutually parallel strip holes, and n mutually parallel strips located outside the outermost or second outermost strip holes in a direction perpendicular to the m strip holes. holes, the n strip holes are respectively arranged vertically with the m strip holes;

The four plastic frames are all connected to the backplane through the detachable connection structure. The four plastic frames are a first plastic frame, a second plastic frame and a third plastic frame respectively arranged vertically with the m strip holes. frame, and a fourth plastic frame arranged perpendicularly to the n strip holes; the position of the first plastic frame on the back plate is fixed on the back plate through the detachable connection structure, the second plastic frame and The position of the third plastic frame on the back plate can be moved along the length direction of the m strip holes through the detachable connection structure, and the position of the fourth plastic frame on the back plate can be moved through the detachable connection structure. The structure moves along the length direction of the n strip holes, where m and n are positive integers greater than or equal to 1.

3. The backlight module according to claim 2, wherein,

The m=2, n=2.

4. The backlight module according to claim 2 or 3, wherein,

The detachable connection structure used to connect the first plastic frame to the back panel is a fastener structure or a buckle slot structure; used to connect the second plastic frame, the third plastic frame and the fourth plastic frame to the back panel respectively. The detachable connection structure is a fastener structure.

5. The backlight module according to claim 4, wherein,

The fastener structure is at least one of a bolt and nut structure, a stud and nut structure, and a screw and nut structure.

6. The backlight module according to any one of claims 1-5, wherein,

The backlight module also includes a light guide plate and a light source; the light guide plate is arranged on the back plate and within a rectangular area surrounded by the four plastic frames, and the light source is arranged on at least one of the four plastic frames. Between the plastic frame and the corresponding side of the light guide plate.

7. The backlight module according to any one of claims 1-6, wherein,

Each plastic frame is in the shape of an L-shaped plate, which includes a horizontal part and a vertical part that are perpendicular to each other. The vertical part is arranged perpendicularly to the back plate. The horizontal part extends in a direction close to the light guide plate and extends to the light guide plate. At the edge of the light-emitting surface.

8. The backlight module according to claim 6, wherein,

The light source includes at least one sub-light source and a printed circuit board electrically connected to the at least one sub-light source; the surface of the printed circuit board is arranged parallel to the light incident surface of the light guide plate.

9. The backlight module according to claim 8, wherein a strip hole is provided on the back plate at a position corresponding to the printed circuit board, and the strip hole is arranged parallel to the light incident surface of the light guide plate, and its length is is greater than the length of the printed circuit board, and the width is greater than the thickness of the printed circuit board.

10. The backlight module according to any one of claims 1-9, wherein,

The backlight module also includes at least one elongated blocking bar, each blocking bar is disposed between a plastic frame and the back plate, and the blocking bar is used to fix the plastic frame to the back plate.

11. The backlight module according to claim 10, wherein,

There are four said retaining bars. Each retaining bar is in the shape of an L-shaped plate, which includes a horizontal part and a vertical part that are perpendicular to each other. The horizontal part of the retaining bar is arranged on the back plate and the vertical part of the corresponding plastic frame. In between, the vertical part of the blocking bar is arranged perpendicularly to the horizontal part of the corresponding plastic frame, and the printed circuit board is fixed on the outside of the vertical part of the corresponding blocking bar;

The detachable connection structure is used to connect the back plate, plastic frame and retaining bars.

12. The backlight module according to any one of claims 1-11, wherein, The backlight module further includes a support for adjusting the height of the light guide plate in a direction perpendicular to the back plate. The support layer is disposed between the back plate and the light guide plate.