CN218767714U

CN218767714U - High-contrast lateral-entering LED backlight module

Info

Publication number: CN218767714U
Application number: CN202223136257.9U
Authority: CN
Inventors: 李涛
Original assignee: Shenzhen Jinghua Display Technology Co ltd
Current assignee: Shenzhen Jinghua Display Technology Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-03-28
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a side income formula LED backlight module of high contrast, including the optics diaphragm, the optics diaphragm is attached on the leaded light piece, a side of leaded light piece is provided with the board in a poor light, the periphery of leaded light piece is provided with the reflection tank, the reflection tank runs through along leaded light piece thickness direction and arranges, the reflection tank sets up the multiunit along the marginal length direction interval of leaded light piece, the periphery of leaded light piece is provided with the LED banks, the light emitting diode's of LED banks directional reflection tank's vallecular cavity, this module is when in-service use, attach the optics diaphragm on the leaded light piece, inner face at the leaded light piece sets up the board in a poor light, the reflection tank who arranges through the leaded light piece, the periphery of leaded light piece sets up the LED banks, make the directional reflection tank's of light that the LED banks launches the intracavity, and produce the diffuse reflection, and then make form even reflection light on the leaded light piece, and then realize the illumination to the LCD screen, make the effect of lighting of LCD screen more even, in order to improve the purpose that this LCD screen shows the quality.

Description

High-contrast lateral-entering LED backlight module

Technical Field

The utility model relates to a vehicle-mounted display equipment technical field, concretely relates to side income formula LED backlight module of high contrast.

Background

The edge-type backlight module is widely used in liquid crystal displays. In recent years, in order to improve the contrast of a liquid crystal display panel and to improve the problem of dynamic liquid crystal smear, a High-dynamic contrast (HDR) technology has emerged. The HDR technology can increase the luminance range, improve the contrast of the brightest and darkest pictures, not only obtain a wider color range, but also bring a darker or whiter color effect, so that a user can see more picture details, and the display effect is greatly improved. The HDR technique is to divide a backlight into a plurality of regions in a certain direction, each region is called a Block (Block), each region is rectangular, and a liquid crystal display is also divided into a plurality of regions corresponding to the backlight. Each section of the backlight coincides with a projection of a section of the liquid crystal display vertically above the backlight. Light from each section of the backlight is emitted to the liquid crystal display to provide light for image display, and the brightness of each section of the backlight is independently adjusted to achieve the desired contrast of the displayed image. Generally, the higher the contrast value of HDR, the better the display effect. To obtain higher HDR contrast values, the more partitions of the backlight the better. The prior art has the following defects: the contrast ratio of a conventional TFT display screen is about 1000, and in order to improve the contrast ratio problem, a direct type LED array dimming backlight source or an OLED display screen is generally selected and used, so that the cost is high, visual dizzy is easily generated, backlight display is uneven, the display effect of a vehicle-mounted display panel is poor, and the product force of an automobile is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a formula LED backlight module is gone into to side of high contrast can improve vehicle-mounted display screen's display effect for vehicle-mounted display screen display effect is more even, improves vehicle-mounted display screen's product quality.

The utility model discloses the technical scheme who takes specifically as follows:

the utility model provides a high contrast's side income formula LED backlight module, includes the optics diaphragm, the optics diaphragm is attached on the leaded light piece, a side of leaded light piece is provided with the board in a poor light, the periphery of leaded light piece is provided with the reflection groove, the reflection groove runs through along leaded light piece thickness direction and arranges, the reflection groove sets up the multiunit along the marginal length direction interval of leaded light piece, the periphery of leaded light piece is provided with the LED banks, the luminous light of LED banks points to the cell cavity in reflection groove.

The utility model discloses still include following characteristic:

the edge of the light guide sheet is also provided with a through groove, the cross section of the through groove is semicircular, and the through groove is arranged along the length direction of the edge of the light guide sheet.

The cross section of the reflecting groove is integrally triangular, the groove wall of the reflecting groove comprises a right-angle surface and a reflecting inclined surface, the right-angle surface is perpendicular to one side surface of the light guide sheet, and an arc-shaped surface is arranged at the combination position of the right-angle surface and the reflecting inclined surface.

The through grooves are arranged in two groups at intervals along the thickness direction of the light guide plate.

The LED lamp bank is integrally in a strip-shaped structure, the LED lamp bank is arranged on an adjusting support, and the adjusting support is arranged on a backlight plate.

The LED backlight module comprises a backlight plate, and is characterized in that a clamping groove is formed in the back of the backlight plate, the clamping groove penetrates along the length direction of the edge of the backlight plate, a leading-in clamping groove plate is arranged on an adjusting support and clamped in a notch of the clamping groove, a vertical plate is arranged on one side plate of the leading-in clamping groove plate, and the LED lamp bank is installed on the vertical plate.

The backlight module is characterized in that a fixing clamping groove is further formed in the combination of the light guide sheet and the backlight plate, a clamping protrusion is arranged on the backlight plate, and the clamping protrusion is clamped in the fixing clamping groove.

One side of the light guide sheet is provided with insertion grooves, the insertion grooves are arranged at four corners of the light guide sheet, and the optical film is installed in the insertion grooves through fixing connectors.

The light guide plate and the backlight plate are packaged with a frame body at the edge position, the frame body comprises a lower frame body and an upper frame body, and locking positions are arranged at four corner positions of the lower frame body and the upper frame body and are fixed through screws.

The edge of the inner frame of the upper frame body is provided with an annular clamping groove, a rubber ring is arranged in the annular clamping groove, and the rubber ring protrudes out of a notch of the annular clamping groove and abuts against the optical diaphragm in a laminating mode.

The utility model discloses the technological effect who gains does: this module is when in actual use, with the optical film piece attached on the light guide plate, set up the board in a poor light in the inner face of light guide plate, the reflex groove of arranging through the light guide plate, set up the LED banks to the periphery of light guide plate, make the directional cell cavity in reflex groove of light that the LED banks launches, and produce the diffuse reflection, and then make and form even reflected light on the light guide plate, and then realize lighting to the LCD screen, make the effect of lighting of LCD screen more even, in order to improve the purpose of this LCD screen display quality.

Drawings

Fig. 1 and fig. 2 are schematic views of two viewing angle structures of a high-contrast side-in LED backlight module;

FIG. 3 is a front view of a high contrast side-entry LED backlight module;

fig. 4 and 5 are a schematic plan view and a schematic structural view of the backlight plate;

FIGS. 6 and 7 are schematic views of two viewing angle structures of the light guide plate;

FIG. 8 is a front view of the adjustment bracket;

FIG. 9 is a schematic view of a light guide plate.

Detailed Description

In order to make the objects and advantages of the present invention more apparent, the present invention will be described in detail with reference to the following embodiments. It is to be understood that the following text is only intended to describe one or several particular embodiments of the invention, and does not strictly limit the scope of the claims specifically claimed. As used herein, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include tolerances for machining or human error, rationale, and inconsistencies;

specific features of the high-contrast side-in LED backlight module are described in detail below with reference to fig. 1 to 9:

the utility model provides a high contrast's side income formula LED backlight module, includes optical film 100, optical film 100 is attached on leaded light piece 200, a side of leaded light piece 200 is provided with board 300 in a poor light, the periphery of leaded light piece 200 is provided with reflection groove 210, reflection groove 210 runs through along leaded light piece 200 thickness direction and arranges, reflection groove 210 sets up the multiunit along the marginal length direction interval of leaded light piece 200, the periphery of leaded light piece 200 is provided with LED banks 400, the luminous light of LED banks 400 points to the groove cavity of reflection groove 210.

This module is when practical application, with optical film 100 attached on leaded light piece 200, set up board 300 in a poor light in the inner face of leaded light piece 200, reflecting groove 210 through leaded light piece 200 arranges, set up LED banks 400 to the periphery of leaded light piece 200, make the directional grooving of reflecting groove 210's of light that LED banks 400 launched in the groove cavity, and produce the diffuse reflection, and then make and form even reflection light on the leaded light piece 200, and then realize lighting to the LCD screen, make the effect of lighting of LCD screen more even, in order to improve the purpose of this LCD screen display quality.

The light emitted by the LED lamp set 400 is reflected in the groove cavity of the reflection groove 210 in a concentrated manner, the groove cavity of the reflection groove 210 forms diffuse reflection on the light through the refraction effect of the light, and then the middle display area of the light guide sheet 200 forms an even light emitting area, so that the liquid crystal screen can be lightened.

More preferably, in order to improve the efficiency of diffuse reflection of light emitted from the LED lamp set 400, the edge of the light guide plate 200 is further provided with a through groove 220, the cross section of the through groove 220 is semicircular, and the through groove 220 is arranged along the length direction of the edge of the light guide plate 200.

The reflective groove 210 and the through groove 220 are matched, when the light emitted from the LED lamp set 400 is directed to the through groove 220 and the reflective groove 210 to form multi-directional reflection, the light is refracted by the reflective groove 210 and the groove plate of the through groove 220, and finally forms uniform diffuse reflection on the light, so that a uniform light emitting region is formed in the middle display region of the light guide sheet 200.

More specifically, the cross section of the reflection groove 210 is generally triangular, the groove wall of the reflection groove 210 includes a right-angle surface 211 and a reflection inclined surface 212, the right-angle surface 211 is arranged perpendicular to one side surface of the light guide sheet 200, and an arc surface 213 is disposed at a joint position of the right-angle surface 211 and the reflection inclined surface 212.

The groove wall of the reflective groove 210 includes a right-angle surface 211 and a reflective inclined surface 212, and the combination position of the right-angle surface 211 and the reflective inclined surface 212 is provided with an arc-shaped surface 213, when the incident light is directed to the reflective inclined surface 212 of the reflective groove 210, a primary refraction and reflection are formed, and the light is reflected and refracted again through the right-angle surface 211, so that the light is uniformly guided into the light guide sheet 200, and the uniformity of the refraction is further improved by the arc-shaped surface 213.

Preferably, the through grooves 220 are provided at two sets at intervals in the thickness direction of the light guide plate 200.

The LED lamp set 400 is integrally formed in a strip structure, the LED lamp set 400 is mounted on an adjusting bracket 410, and the adjusting bracket 410 is mounted on the backlight plate 300.

The LED lamp set 400 is mounted on the adjusting bracket 410, and the position of the LED lamp set 400 on the adjusting bracket 410 is adjustable, so that the uniformity of the LED lamp set 400 irradiating to the light guide sheet 200 is kept uniform, and the brightness of the LED lamp set 400 can be adjusted according to the actual brightness of light, thereby adjusting the brightness of the liquid crystal display.

The back of the backlight panel 300 is provided with a clamping groove 310, the clamping groove 310 penetrates along the length direction of the edge of the backlight panel 300, the adjusting bracket 410 is provided with a lead-in clamping groove plate 411, the lead-in clamping groove plate 411 is clamped in a notch of the clamping groove 310, one side plate of the lead-in clamping groove plate 411 is provided with a vertical plate 412, and the LED lamp set 400 is installed on the vertical plate 412.

When implementing the installation to adjustment support 410 and backlight board 300, through leading in the cooperation of joint slot board 411 and joint slot 310, and then conveniently realize the dismouting to adjustment support 410 and backlight board 300.

In order to realize the combined installation of the light guide sheet 200 and the backlight panel 300, a fixing slot 230 is further arranged on the combination of the light guide sheet 200 and the backlight panel 300, a clamping protrusion 320 is arranged on the backlight panel 300, and the clamping protrusion 320 is clamped in the fixing slot 230.

In order to realize the installation of the optical film 100 and the light guide plate 200, one side of the light guide plate 200 is provided with insertion grooves 240, the insertion grooves 240 are arranged at four corners of the light guide plate 200, and the optical film 100 is installed in the insertion grooves 240 through fixing joints.

The frame 500 is packaged at the edge positions of the light guide sheet 200 and the backlight panel 300, the frame 500 comprises a lower frame 510 and an upper frame 520, and locking positions are arranged at four corner positions of the lower frame 510 and the upper frame 520 and fixed through screws.

More specifically, in order to effectively combine the upper frame 520 and the optical film 100, an annular clamping groove 530 is disposed at an edge of an inner frame of the upper frame 520, a rubber ring 540 is disposed in the annular clamping groove 530, and the rubber ring 540 protrudes out of a notch of the annular clamping groove 530 and abuts against the optical film 100.

The periphery of the outer side face of the light guide sheet 200 is provided with a plurality of groups of rectangular clamping grooves, the upper frame body 520 is provided with positioning protrusions, the positioning protrusions are clamped in the rectangular clamping grooves, preliminary positioning of the upper frame body 520 is achieved, and the lower frame body 510 and the upper frame body 520 can be reliably fixed through screws.

Claims

1. The utility model provides a side income formula LED backlight module of high contrast which characterized in that: including optics diaphragm (100), optics diaphragm (100) are attached on leaded light piece (200), a side of leaded light piece (200) is provided with board (300) in a poor light, the periphery of leaded light piece (200) is provided with reflecting groove (210), reflecting groove (210) run through along leaded light piece (200) thickness direction and arrange, reflecting groove (210) set up the multiunit along the marginal length direction interval of leaded light piece (200), the periphery of leaded light piece (200) is provided with LED banks (400), the luminous light of LED banks (400) points to the groove cavity of reflecting groove (210).

2. The high-contrast lateral-entry LED backlight module of claim 1, wherein: the edge of the light guide plate (200) is also provided with a through groove (220), the cross section of the through groove (220) is semicircular, and the through groove (220) is arranged along the length direction of the edge of the light guide plate (200).

3. The high-contrast lateral-entry LED backlight module of claim 1, wherein: the cross section of the reflection groove (210) is integrally triangular, the groove wall of the reflection groove (210) comprises a right-angle surface (211) and a reflection inclined surface (212), the right-angle surface (211) is perpendicular to one side surface of the light guide sheet (200), and an arc-shaped surface (213) is arranged at the joint position of the right-angle surface (211) and the reflection inclined surface (212).

4. The high-contrast lateral-entry LED backlight module of claim 2, wherein: two groups of through grooves (220) are arranged at intervals along the thickness direction of the light guide plate (200).

5. The high-contrast lateral-entry LED backlight module of claim 1, wherein: the LED lamp set (400) is integrally in a strip-shaped structure, the LED lamp set (400) is installed on an adjusting support (410), and the adjusting support (410) is installed on the backlight plate (300).

6. The high-contrast lateral-entry LED backlight module of claim 5, wherein: the backlight plate is characterized in that a clamping groove (310) is formed in the back face of the backlight plate (300), the clamping groove (310) penetrates through the backlight plate along the length direction of the edge of the backlight plate (300), a guide-in clamping groove plate (411) is arranged on the adjusting support (410), the guide-in clamping groove plate (411) is clamped in a notch of the clamping groove (310), a vertical plate (412) is arranged on one side plate of the guide-in clamping groove plate (411), and the LED lamp bank (400) is installed on the vertical plate (412).

7. The high-contrast lateral-entry LED backlight module of claim 6, wherein: the backlight module is characterized in that a fixing clamping groove (230) is further formed in the combination of the light guide sheet (200) and the backlight plate (300), a clamping protrusion (320) is arranged on the backlight plate (300), and the clamping protrusion (320) is clamped in the fixing clamping groove (230).

8. The high-contrast lateral-entry LED backlight module of claim 7, wherein: one side of the light guide sheet (200) is provided with an insertion groove (240), the insertion grooves (240) are arranged at four corners of the light guide sheet (200), and the optical film (100) is installed in the insertion groove (240) through a fixing head.

9. The high contrast edge-lit LED backlight module of claim 8, wherein: the light guide plate (200) and the backlight plate (300) are packaged with a frame body (500) at the edge positions, the frame body (500) comprises a lower frame body (510) and an upper frame body (520), four corner positions of the lower frame body (510) and the upper frame body (520) are provided with locking positions, and the locking positions are fixed through screws.

10. The high-contrast lateral-entry LED backlight module of claim 9, wherein: an annular clamping groove (530) is formed in the edge of the inner frame of the upper frame body (520), a rubber ring (540) is arranged in the annular clamping groove (530), and the rubber ring (540) protrudes out of a notch of the annular clamping groove (530) and is attached to and abutted against the optical diaphragm (100).