CN204513083U - A kind of down straight aphototropism mode set and liquid crystal display - Google Patents

Abstract

The utility model discloses a direct-type backlight module, comprising: a backboard and a backlight light source arranged on the backboard, the backlight light sources are arranged in a matrix, and the backlight light source includes: a non-light cup-type light emitting diode, It is located at the top corner of the matrix backlight light source; there is a light-cup type light-emitting diode, which is located at a position other than the top corner of the matrix backlight light source. With this type of direct backlight module, the divergence angle of the matte cup-type LEDs is larger than that of the bright cup-type LEDs. Therefore, the matte cup-type LEDs are closest to the top corner of the backplane, which can improve the brightness of the corners of the display module. The brightness improves the phenomenon that the overall light emission of the backlight module in the prior art cannot meet the requirement of brightness uniformity.

Description

A direct type backlight module and liquid crystal display

technical field

The utility model relates to the technical field of liquid crystal displays, in particular to a direct-lit backlight module.

Background technique

At present, liquid crystal display has become the mainstream flat panel display device. However, since the liquid crystal panel itself does not emit light, the backlight module has become one of the indispensable and important components of the liquid crystal display. It is currently used in the backlight source (Light Emitting Diode, Light-emitting diode) backlight module is generally a direct-type structure.

The light emitted by the backlight light source forms a divergent light spot on the diffusion plate, and the brightness of the divergent light spot will gradually decrease from the middle to the surrounding. In the prior art, in order to ensure the brightness uniformity of the module display, it is necessary to adjust the distance between adjacent backlight light source lamps. The distance between the backlight and the light spots on the diffusion plate slightly overlaps, so that the display brightness of the display screen is more uniform, because the backlight near the edge of the backplane has no adjacent backlight on the side close to the backlight. , so the light at the edge will be darker. In the prior art, the distance between the edge of the backplane and the backlight light source adjacent to the edge of the backplane is often adjusted so that the edge of the backplane is close to the center of the light spot, so that its brightness does not need to overlap with the light spots of other light sources to meet the uniformity of the backlight brightness. sexual demands.

The inventors found that after adjusting the distance between the edge of the backplane and the backlight light source adjacent to the edge of the backplane, the distance between the four corners of the backlight module and the backlight light source is greater than the distance between the edge of the backlight module and the backlight light source, so that When the brightness at the edge of the backplane meets the brightness uniformity, the brightness of the four corners of the display surface of the backlight module is still lower than the brightness of other display areas, which cannot meet the requirement of brightness uniformity.

To sum up, the technical solutions in the prior art still cannot meet the requirement of brightness uniformity.

Contents of the invention

The embodiment of the utility model provides a direct type backlight module, which is used to solve the problem that the technical solutions in the prior art cannot meet the requirement of brightness uniformity.

The utility model provides a direct-type backlight module, comprising: a backplane and a backlight light source arranged on the backplane, the backlight light sources are arranged in a matrix, and the backlight light sources include: a non-light cup-type light emitting diode, It is located at the top corner of the matrix backlight light source; there is a light-cup type light-emitting diode, which is located at a position other than the top corner of the matrix backlight light source.

Further, a lens is also arranged above the backlight source.

Further, the lens includes: a first lens, and the first lens is arranged above the light-emitting cup-type light-emitting diode;

The second lens, the second lens is arranged above the light-cup-type light-emitting diode; wherein, the divergence angle of the first lens is larger than the divergence angle of the second lens.

Optionally, the first lens is a reflective lens, and the second lens is a refractive lens.

Optionally, the first lens is a reflective lens, and the second lens is a reflective lens.

Optionally, the first lens is a refractive lens, and the second lens is a refractive lens.

Further, the backlight light sources in the same row are arranged on the same light bar; or, the backlight light sources in the same column are arranged on the same light bar.

Further, the distance between the backlight light source adjacent to the edge of the backplane and the edge of the backplane is smaller than the distance between the backlight light source on the same light bar and its adjacent backlight light source .

Further, the distances between adjacent backlight light sources are equal.

The utility model also provides a liquid crystal display, which includes any one of the direct-lit backlight modules mentioned above.

In the embodiment of the utility model, the direct type backlight module includes: a backplane and a backlight light source arranged on the backplane. The top angle position of the matrix backlight source; the optical cup type light-emitting diode is located at a position other than the top angle position of the matrix backlight source. With the direct-type backlight module provided by the embodiment of the present invention, since the divergence angle of the non-light cup-type light-emitting diode is larger than that of the light-colored cup-type light-emitting diode, the non-light cup type emits light under the same light mixing distance. The diode can form a larger light spot on the diffuser plate, so that the brightness of the divergent light spot formed by the non-light cup type LED on the diffuser plate to the corner of the backlight module is consistent with the brightness of other display areas. The new model provides a technical solution. The large divergence angle of the non-light cup-type light-emitting diode improves the brightness of the backlight at the corner of the backlight module, which improves the problem that the overall light emission of the backlight module in the prior art cannot meet the uniformity of brightness. Require.

Description of drawings

Fig. 1 is a schematic diagram of a backlight light source of a direct type backlight module provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of a light bar-shaped backlight light source direct-lit backlight module provided by an embodiment of the utility model;

Fig. 3 is a schematic diagram of another direct type backlight module provided by the embodiment of the utility model;

Fig. 4 is a schematic diagram of a direct type backlight module provided by an embodiment of the present invention;

Fig. 5 is a schematic diagram of another direct type backlight module provided by the embodiment of the present invention;

Fig. 6 is a schematic diagram of another direct type backlight module provided by the embodiment of the present invention;

FIG. 7 is a schematic diagram of the distance between backlight light sources in the direct-lit backlight module shown in FIG. 2;

Fig. 8 is a structural schematic diagram of a light-cup type light-emitting diode;

FIG. 9 is a schematic structural diagram of a non-light cup-type light-emitting diode.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, rather than all implementations example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The inventors found that organic light emitting diodes in the prior art include the following two types. One is a light cup type light emitting diode as shown in FIG. The other is a non-light cup light-emitting diode as shown in FIG. 9 , which includes a light-emitting chip 13 and a fluorescent layer 14. The non-light cup light-emitting diode is also called a COB (chip) LED.

In the embodiment of the utility model, the direct type backlight module includes: a backplane and a backlight light source arranged on the backplane. The top angle position of the matrix backlight source; the optical cup type light-emitting diode is located at a position other than the top angle position of the matrix backlight source. With the direct-type backlight module provided by the embodiment of the present invention, since the divergence angle of the non-light cup-type light-emitting diode is larger than that of the light-colored cup-type light-emitting diode, the non-light cup type emits light under the same light mixing distance. The diode can form a larger light spot on the diffusion plate, so that the brightness of the divergent light spot formed by the non-light cup-type light-emitting diode on the diffusion plate to the corner of the backlight module is consistent with the brightness of other display areas, so the utility model adopts the A technical solution is provided. The large divergence angle of the non-light cup-type light-emitting diode improves the brightness of the backlight at the corner of the backlight module, which improves the overall luminescence of the backlight module in the prior art and cannot meet the requirements of brightness uniformity. .

As shown in Figure 1, "1" is a non-light cup-type LED, which is the backlight source closest to the top corner of the backplane, and "2" is a light-colored cup-type LED, which is the Backlight source.

Further, as shown in FIG. 2, the backlight light sources in the same row are arranged on the same light bar. Optionally, there are 9 backlight light source light bars in total, and each backlight light source light bar contains 5 backlight light sources. The light source, wherein, the light bar of the backlight light source is parallel to the short side of the backboard.

Further, as shown in FIG. 3, the backlight light sources in the same row are arranged on the same light bar. Preferably, there are 5 backlight light source light bars in total, and each backlight light source light bar contains 9 The backlight source, wherein, the backlight source lamp bar is parallel to the long side of the backboard.

In an embodiment of the present invention, a lens is arranged above the backlight light source of the direct-lit backlight module.

Described lens can be following several situations:

1) The first lens is a reflective lens, and the second lens is a refractive lens.

2) The first lens is a reflective lens, and the second lens is a reflective lens.

3) The first lens is a refractive lens, and the second lens is a refractive lens.

In the first case, the first lens is a reflective lens, and the second lens is a refractive lens, wherein the divergence angle of the first lens is greater than that of the second lens. As shown in FIG. 4 , "B" is a reflective lens arranged on the light-cup-type LED, and "A" is a refracting lens arranged on the light-cup-type LED.

Wherein, the backlight light source in Fig. 4 can be combined into 9 backlight light source light bars according to Fig. Parallel; 5 backlight light strips can also be combined according to Figure 3, and each backlight light strip contains 9 backlight light sources, wherein the backlight light strips are parallel to the long side of the backboard. In the embodiments of the present invention, there is no limitation that the light bar combined with the backlight light source is specifically parallel to a certain side of the backboard.

In the second case, the first lens is a reflective lens, and the second lens is a reflective lens, wherein the divergence angle of the first lens is larger than that of the second lens. As shown in FIG. 5 , "D" is a reflective lens arranged on the light-cup-type light-emitting diode, and "C" is a refraction-type lens arranged on the light-cup-type light-emitting diode.

Similarly, the backlight light source in Fig. 5 can be combined into 9 backlight light source light bars according to Fig. The sides are parallel; 5 backlight light strips can also be combined according to Figure 3, and each backlight light strip contains 9 backlight light sources, wherein the backlight light strips are parallel to the long sides of the backboard. The embodiment of the utility model does not limit that the light bar combined with the backlight light source is specifically parallel to a certain side of the backboard.

In the third case, the first lens is a refracting lens, and the second lens is a refracting lens, wherein the divergence angle of the first lens is larger than that of the second lens. As shown in FIG. 6 , "E" is a refraction lens arranged on the light-cup-type light-emitting diode, and "F" is a refraction-type lens arranged on the light-cup type light-emitting diode.

Similarly, the backlight light source in Fig. 6 can be combined into 9 backlight light source light bars according to Fig. The sides are parallel; 5 backlight light strips can also be combined according to Figure 3, and each backlight light strip contains 9 backlight light sources, wherein the backlight light strips are parallel to the long sides of the backboard. In the embodiments of the present invention, there is no limitation that the light bar combined with the backlight light source is specifically parallel to a certain side of the backboard.

Further, the distances between the backlight light sources on the same light bar and the adjacent backlight light sources are equal.

Further, the distance between the backlight light sources on adjacent light bars is equal to the distance between the adjacent backlight light sources on the same light bar.

Further, the distance between the backlight light sources on the same light bar at the edge of the backboard and the edge of the backboard is smaller than the distance between the adjacent backlight light sources on the same light bar. distance.

As shown in Figure 9, the distance between the backlight light sources on the same light strip on the backplane is L1, the distance between the backlight light sources on adjacent light strips is L1, and the distance between the backlight light sources on the same light strip on the backplane is L1. The distance between the backlight light source on the light bar and the edge of the backboard is L2, and L2<L1.

In the embodiment of the present invention, the direct type backlight module arranged in a 5*9 pattern is taken as an example, and the design method of the backlight module of the present invention is described in detail with reference to FIG. 3 and FIG. 4 .

In the embodiment of the utility model, the direct type backlight module includes: a backplane and a backlight light source arranged on the backplane. The top angle position of the matrix backlight source; the optical cup type light-emitting diode is located at a position other than the top angle position of the matrix backlight source. With the direct-type backlight module provided by the embodiment of the present invention, since the divergence angle of the non-light cup-type light-emitting diode is larger than that of the light-colored cup-type light-emitting diode, the non-light cup type emits light under the same light mixing distance. The diode can form a larger light spot on the diffusion plate, so that the brightness of the divergent light spot formed by the non-light cup-type light-emitting diode on the diffusion plate to the corner of the backlight module is consistent with the brightness of other display areas, so the utility model adopts the A technical solution is provided. The large divergence angle of the non-light cup-type light-emitting diode improves the brightness of the backlight at the corner of the backlight module, which improves the overall luminescence of the backlight module in the prior art and cannot meet the requirements of brightness uniformity. .

Preferably, a first lens is arranged above the light cup type light emitting diode, a second lens is arranged above the light cup type light emitting diode, and the divergence angle of the first lens is larger than that of the second lens, therefore, the first lens can Further enlarging the divergent light spots of the non-light cup-type light-emitting diodes improves the brightness of the backlight at the corners of the backlight module, improving the fact that the overall light emission of the backlight module in the prior art cannot meet the requirement of brightness uniformity.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (10)

1. A direct type backlight module, comprising: a backplane and a backlight light source arranged on the backplane, the backlight light source is arranged in a matrix, it is characterized in that, The backlight source includes: Non-light cup-type light-emitting diodes, located at the top corner of the matrix backlight source; The light-cup-type light-emitting diodes are located at positions other than the top corner positions of the matrix backlight light source. 2. The direct type backlight module as claimed in claim 1, characterized in that, A lens is also arranged above the backlight source. 3. The direct type backlight module as claimed in claim 2, characterized in that, The lenses include: The first lens, the first lens is arranged above the light-emitting diode of the lightless cup; The second lens, the second lens is arranged above the light-cup-type light-emitting diode; Wherein, the divergence angle of the first lens is greater than the divergence angle of the second lens. 4. The direct type backlight module according to claim 3, wherein the first lens is a reflective lens, and the second lens is a refractive lens. 5. The direct type backlight module according to claim 3, wherein the first lens is a reflective lens, and the second lens is a reflective lens. 6 . The direct type backlight module according to claim 3 , wherein the first lens is a refraction lens, and the second lens is a refraction lens. 7. The direct type backlight module according to any one of claims 1-6, characterized in that, The backlight light sources in the same row are arranged on the same light bar; or, The backlight light sources in the same column are arranged on the same light bar. 8. The direct-lit backlight module according to claim 7, wherein the distance between the backlight light source adjacent to the edge of the backplane and the edge of the backplane is smaller than the The distance between adjacent light sources of the backlight. 9. The direct type backlight module according to claim 8, wherein the distances between adjacent backlight light sources are equal. 10. A liquid crystal display, characterized in that, comprising the direct-type backlight module according to any one of claims 1 to 9.