CN217543439U

CN217543439U - Light guide plate for backlight illumination of liquid crystal display

Info

Publication number: CN217543439U
Application number: CN202221794786.5U
Authority: CN
Inventors: 易乐; 袁誉春; 宗亮亮; 余斌; 魏爱平
Original assignee: Shenzhen Gaoguang Optoelectronic Technology Co ltd
Current assignee: Shenzhen Gaoguang Optoelectronic Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-10-04
Anticipated expiration: 2032-07-12

Abstract

The utility model discloses a LCD backlight's light guide plate, including backlight unit, liquid crystal unit and light guide plate main part, backlight unit includes the circuit bottom plate, LED lamp strip, position guard and reflector, the left side border of installing on the circuit bottom plate is inlayed to the LED lamp strip, position guard fixed mounting is on the circuit bottom plate, the liquid crystal unit is inlayed and is installed on the position guard, the right side shaping of position guard has the slot, the LED fluting lets in the slot setting, left side border shaping in the slot has 45 oblique angles, 45 oblique angles are located the top of LED lamp strip, light guide plate main part clearance fit inserts the slot setting, reflector fixed mounting is in the bottom side in the slot, the left side border of reflector upwards buckles and covers 45 oblique angles and sets up, the left side border of LED lamp strip illumination light guide plate main part through 45 oblique angles, the upside of light guide plate main part covers in proper order and pastes and has membrane and diffusion, the upside of diffusion barrier is provided with colored ya keli board.

Description

Light guide plate for backlight illumination of liquid crystal display

Technical Field

The utility model belongs to the technical field of the light guide plate design and specifically relates to a light guide plate of LCD backlight.

Background

The light guide plate is characterized in that light guide points are printed on the bottom surface of the optical acrylic plate by using laser engraving, V-shaped cross grid engraving and UV screen printing technologies by using the optical acrylic/PC plate and then using a high-tech material with extremely high refractive index and no light absorption. The optical-grade acrylic sheet is used for absorbing the light emitted from the lamp to stay on the surface of the optical-grade acrylic sheet, when the light irradiates each light guide point, the reflected light can be diffused towards each angle, and then the reflected light is damaged and is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes. Backlight unit on the market is including stacking backplate, reflection stratum, light guide plate, membrane and the diffusion barrier together in proper order, increases the lamp strip at the side of light guide plate, and the lamp strip launches the area source through backlight unit and illuminates the liquid crystal unit.

Light guide plate structure on the market is various today, can satisfy people's user demand basically, but backlight unit's colour can't be changed, and the light guide plate is fixed in backlight unit in addition, hardly realizes the function of convenient maintenance during the use, the convenience when seriously influencing light guide plate structure use, the light strip need be fixed to the side of light guide plate in addition, the light guide plate is possible to crush the light strip when meetting the collision, and then influences backlight unit's normal work.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, provides a technical scheme that can solve above-mentioned problem.

The utility model provides a liquid crystal display backlight's light guide plate, including backlight unit, liquid crystal unit and light guide plate main part, backlight unit includes the circuit bottom plate, the LED lamp strip, position fixing cover and reflector, the left side border of LED lamp strip inlay installation on the circuit bottom plate, position fixing cover fixed mounting is on the circuit bottom plate, the liquid crystal unit inlays and installs on the position fixing cover, the equal electric connection of LED lamp strip and liquid crystal unit is to the circuit bottom plate, the right side shaping of position fixing cover has the slot, the downside shaping of position fixing cover has the LED fluting, the LED fluting lets in the slot setting, LED lamp strip clearance fit installs in the LED fluting, the left side border shaping in the slot has 45 oblique angles, 45 oblique angles are located the top of LED lamp strip, light guide plate main part clearance fit inserts the slot setting, reflector fixed mounting is in the bottom side in the slot, the left side border of reflector upwards buckles and covers 45 oblique angles setting, the left side border of reflector strip illumination to the light guide plate main part through 45 oblique angles, the upside of light guide plate main part covers in proper order and pastes lustre to membrane and diffusion barrier, the upside of diffusion barrier is provided with colored ya kelly board.

As a further aspect of the present invention: the equal shaping of both sides has the stopper around in the slot, and the stopper setting is on the right-hand of liquid crystal unit, and the equal shaping of both sides has the slot around the light guide plate main part, and the stopper one-to-one sliding fit installs in the slot.

As a further aspect of the present invention: the middle part fixed mounting on light guide plate main part right side has the limit of stirring, and the upside shaping of position cap has the dead slot of keeping away, and the right side in dead slot leads to out the position cap setting, stirs limit clearance fit and inserts in keeping away the dead slot.

As a further aspect of the present invention: the middle part shaping on colored inferior gram force board right side has the equipment fluting, stirs limit clearance fit and installs in the equipment fluting, and the width of equipment fluting is greater than the width of stirring the limit.

As a further aspect of the present invention: two reinforcing edges are formed on the upper side of the positioning cover, and the liquid crystal unit is positioned between the two reinforcing edges.

As a further aspect of the present invention: the downside shaping of position cover has a plurality of welding limit, and the shaping has a plurality of welding hole site on the circuit bottom plate, and the welding limit one-to-one corresponds the welding and installs in the welding hole site.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the light guide plate main body can move in the slot, when one side of the light guide plate main body is moved out of the slot, the function of convenient maintenance can be realized, and the convenience degree of the light guide plate structure in use is improved;

2. the color of the backlight module can be changed by placing the color acrylic plate on the diffusion film, and the proper color can be selected according to the actual situation, so that the display effect of the liquid crystal unit is improved;

3. the LED lamp strip shines the side of light guide plate main part through the reflector panel, can not contact LED lamp strip when the light guide plate main part inserts the slot, avoids LED lamp strip to take place to damage.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a backlight module;

FIG. 3 is a schematic cross-sectional view of a backlight module;

FIG. 4 is a schematic front view of the light guide plate;

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 4;

FIG. 6 is a schematic structural view of a light guide plate body;

fig. 7 is an enlarged schematic view of B of fig. 6.

Shown in the figure: 1. a backlight module; 1-1, a circuit bottom board; 1-2, LED lamp strips; 1-3, positioning cover; 1-4, a reflective sheet; 2. a liquid crystal cell; 3. a light guide plate main body; 4. inserting slots; 5. slotting the LED; 6. a bevel angle of 45 degrees; 7. a brightness enhancement film; 8. a diffusion membrane; 9. a colored acrylic sheet; 10. a limiting block; 11. a slot; 12. poking the edge; 13. an empty avoiding groove; 14. assembling and slotting; 15. a reinforcing edge; 16. welding edges; 17. and (6) welding hole positions.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-7, the utility model discloses a light guide plate for backlight illumination of a liquid crystal display, including backlight module 1, liquid crystal unit 2 and light guide plate main part 3, backlight module 1 includes circuit bottom plate 1-1, LED lamp strip 1-2, position cover 1-3 and reflector 1-4, the left side border of LED lamp strip 1-2 mosaic installation on circuit bottom plate 1-1, position cover 1-3 fixed mounting is on circuit bottom plate 1-1, liquid crystal unit 2 mosaic installation is on position cover 1-3, LED lamp strip 1-2 and liquid crystal unit 2 all electric connection are to circuit bottom plate 1-1, the right side of position cover 1-3 is formed with slot 4, the downside of position cover 1-3 is formed with LED fluting 5, LED 5 lets in slot 4 setting, LED lamp strip 1-2 clearance fit installs in LED fluting 5, the left side border in slot 4 is formed with 45 oblique angle 6, 45 oblique angle 6 is located the top of LED lamp strip 1-2, light guide plate main part 3 clearance fit inserts slot 4 setting, reflector 1-4 fixed mounting is in 4, the left side border covers the light guide plate 3 upper side of light guide plate 3 and covers the left side border of light guide plate 3 and covers the light guide plate 3 upper side of light guide plate 3 and the diffuser film 8 of diffuser of light guide plate 3, the diffuser 4 has the oblique angle 8, the diffuser film;

the principle is as follows: the light guide plate main body 3 can move in the slot 4, when one side of the light guide plate main body 3 is moved out of the slot 4, the function of convenient maintenance can be realized, and the convenience degree of the light guide plate structure in use is improved; the color acrylic plate 9 is placed on the diffusion film 8, so that the color of the backlight module 1 can be changed, and a proper color can be selected according to actual conditions, and the display effect of the liquid crystal unit 2 is improved; the LED light bars 1-2 irradiate the side edges of the light guide plate main body 3 through the reflecting sheets 1-4, and the light guide plate main body 3 cannot contact the LED light bars 1-2 when inserted into the slot 4, so that the LED light bars 1-2 are prevented from being damaged; the light guide plate main body 3 can always cover the lower side of the liquid crystal unit 2 when moving, the LED light bars 1-2 illuminate the light guide plate main body 3 through the reflectors 1-4, the light guide plate main body 3 is converted into a surface light source through the brightness enhancement film 7 and the diffusion film 8 to illuminate the liquid crystal unit 2, and the light guide plate main body 3 has small influence on the surface light source after moving.

As a further aspect of the present invention: limiting blocks 10 are formed on the front side and the rear side in the slot 4 respectively, the limiting blocks 10 are arranged on the right side of the liquid crystal unit 2, slots 11 are formed on the front side and the rear side of the light guide plate main body 3 respectively, and the limiting blocks 10 are installed in the slots 11 in a one-to-one corresponding sliding fit manner; make light guide plate main part 3 can not slide out slot 11 completely, facilitate the use avoids light guide plate main part 3 to lose.

As a further aspect of the present invention: a poking edge 12 is fixedly installed in the middle of the right side of the light guide plate main body 3, an empty avoiding groove 13 is formed in the upper side of the positioning cover 1-3, the right side of the empty avoiding groove 13 is arranged through the positioning cover 1-3, and the poking edge 12 is inserted into the empty avoiding groove 13 in a clearance fit mode; the sliding of the light guide plate main body 3 in the slot 4 can be facilitated, and the color of the backlight module 1 can be maintained and replaced conveniently.

As a further aspect of the present invention: an assembly slot 14 is formed in the middle of the right side of the color acrylic plate 9, the poking edge 12 is installed in the assembly slot 14 in a clearance fit mode, and the width of the assembly slot 14 is larger than that of the poking edge 12; when one side of the light guide plate main body 3 slides out of the slot 4, the color acrylic plate 9 can be shifted rightwards, the shifting edge 12 sinks into the assembling groove 14, the right side edge of the color acrylic plate 9 is shifted out of the light guide plate main body 3, and the color acrylic plate 9 is convenient to detach and replace.

As a further aspect of the present invention: two reinforcing edges 15 are formed on the upper side of the positioning cover 1-3, and the liquid crystal unit 2 is positioned between the two reinforcing edges 15; the hardness of the positioning cover 1-3 can be improved, and the liquid crystal unit 2 is not easy to damage in case of collision.

As a further aspect of the present invention: a plurality of welding edges 16 are formed on the lower side of the positioning cover 1-3, a plurality of welding hole positions 17 are formed on the circuit bottom plate 1-1, and the welding edges 16 are welded in the welding hole positions 17 in a one-to-one correspondence manner; the installation of the positioning cover 1-3 on the circuit bottom board 1-1 is more stable.

The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.

Claims

1. The utility model provides a light guide plate of LCD backlight, includes backlight unit, liquid crystal unit and light guide plate main part, its characterized in that: backlight unit includes circuit substrate, LED lamp strip, position guard and reflector panel, LED lamp strip inlays the left side border of installing on circuit substrate, position guard fixed mounting is on circuit substrate, the liquid crystal unit inlays and installs on the position guard, the equal electric connection of LED lamp strip and liquid crystal unit is on circuit substrate, the right side shaping of position guard has the slot, the downside shaping of position guard has the LED fluting, the LED fluting lets in the slot setting, LED lamp strip clearance fit installs in the LED fluting, the left side border shaping in the slot has 45 oblique angles, 45 oblique angles are located the top of LED lamp strip, light guide plate main part clearance fit inserts the slot setting, reflector panel fixed mounting is in the bottom side in the slot, the left side border of reflector panel upwards buckles and covers 45 oblique angle settings, the left side border of reflector panel illumination light guide plate main part that LED lamp strip passes through 45 oblique angles, the upside of light guide plate main part covers in proper order to paste has membrane of adding lustre to and diffusion barrier, the upside of diffusion barrier is provided with colored ya keli board.

2. The light guide plate for backlighting a liquid crystal display of claim 1, wherein: the equal shaping of both sides has the stopper around in the slot, and the stopper setting is right-hand at the liquid crystal unit, and the equal shaping of both sides has the slot around the light guide plate main part, and the stopper one-to-one sliding fit installs in the slot.

3. The light guide plate for backlighting of a liquid crystal display according to any of claims 1 or 2, wherein: the middle part fixed mounting on light guide plate main part right side has the limit of stirring, and the upside shaping of position cap has the dead slot of keeping away, and the right side in dead slot leads to out the position cap setting, stirs limit clearance fit and inserts in keeping away the dead slot.

4. The light guide plate for backlighting of a liquid crystal display according to claim 3, wherein: the middle part shaping on colored inferior gram force board right side has the equipment fluting, stirs limit clearance fit and installs in the equipment fluting, and the width of equipment fluting is greater than the width of stirring the limit.

5. The light guide plate for backlighting a liquid crystal display of claim 1, wherein: two reinforcing edges are formed on the upper side of the positioning cover, and the liquid crystal unit is positioned between the two reinforcing edges.

6. The light guide plate for backlighting a liquid crystal display according to claim 1, wherein: the downside shaping of position cover has a plurality of welding limit, and the shaping has a plurality of welding hole site on the circuit bottom plate, and the welding limit one-to-one corresponds the welding and installs in the welding hole site.