CN203981916U - A kind of light guide plate, backlight and display device - Google Patents

Abstract

The utility model relates to the field of display technology, in particular to a light guide plate, a backlight source and a display device, which are used to solve the problem in the prior art that the light guided by the light guide plate in the backlight source is not uniform. An embodiment of the present invention provides a light guide plate, including a light guide plate body, and the light guide plate body includes a light-incident side surface and a dot distribution surface, and the dot distribution surface intersects the light-incident side surface, wherein: In the direction of the intersection line between the distribution surface and the light-incident side, along the direction from near to far from the intersection line, at least part of the network dots contained in at least some areas of the network dot distribution surface have an increasing proportion of network dots The trend changes so that at least some of the dots in the area where the light intensity is smaller in the at least part of the dot distribution plane have a stronger light emitting property, so as to improve the light emitting uniformity of the light guide plate.

Description

A light guide plate, a backlight source, and a display device

technical field

The utility model relates to the field of display technology, in particular to a light guide plate, a backlight source, and a display device.

Background technique

At present, according to the distribution position of the light source, the backlight source can be divided into direct type and side type. In the side-type backlight, the light source is located on the side of the light guide plate. This type of backlight is mainly used in small-sized display devices such as notebooks, handheld computers, and mobile phones. With the continuous advancement of light source-related technologies, side-type backlights have also begun Applied to a larger-sized display device, it brings users better visual experience.

In the side-lit backlight, the light emitted by the light source enters the light guide plate from the light incident side of the light guide plate, and the light guide plate includes a dot distribution surface intersecting the light incident side, wherein the dot distribution surface includes The plurality of dots are used to change the direction of the light emitted by the light source through means such as reflection and scattering, and then lead it into the display screen of the display device. At present, the design mode of the outlets included in the outlet distribution surface is generally as shown in Figure 1, each outlet 1 included in the outlet distribution surface is evenly distributed, each outlet 1 has the same size, and the distance between adjacent two outlets 1 is equal; The network dots in each area of the network dot distribution surface have the same performance of deriving light.

In practical applications, since the dot distribution surface intersects with the light-incident side, the light intensity emitted by the light source entering each area of the dot distribution surface is different; if the dot distribution as shown in Figure 1 is adopted, Directing the light emitted by the light source into the display screen of the display device will lead to uneven light derived from the light guide plate, that is, the uniformity of the light introduced into the display screen of the display device is relatively poor; quality.

To sum up, at present, in the edge-lit backlight, the light guided by the light guide plate is not uniform, so that the uniformity of the light guided into the display screen of the display device is relatively poor, thereby reducing the display quality of the display device.

Utility model content

The embodiment of the utility model provides a light guide plate, a backlight source, and a display device to solve the problem in the prior art that the light guided by the light guide plate is not uniform in the side-type backlight source.

In the first aspect, the embodiment of the present utility model provides a light guide plate, including a light guide plate body, and the light guide plate body includes a light incident side and a dot distribution surface, and the dot distribution surface intersects the light incident side, wherein:

In the direction perpendicular to the line of intersection between the dot distribution surface and the light-incident side, along the direction from near to far from the line of intersection, the dots of at least part of the dots contained in at least a part of the dot distribution surface The ratio shows an increasing trend, so that at least some of the dots in the area where the light intensity is smaller in the distribution plane have stronger light-extracting properties, so as to improve the uniformity of the light-exiting light of the light guide plate;

Wherein, the dot ratio refers to the ratio of the area occupied by dots in a unit area to the unit area.

Preferably, the light guide plate body includes two opposite sides, and one of the sides is the light-incident side;

In a direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface tends to increase.

Preferably, the light guide plate body includes two opposite sides, and the two sides are light-incident sides;

In the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface shows a trend of first increasing and then decreasing.

Preferably, the light guide plate further includes: a reflective sheet attached to at least one side of the light guide body except the light-incident side.

Preferably, the reflective sheet is attached to a side of the light guide plate body opposite to the light-incident side;

In the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface shows a trend of first increasing and then decreasing, Or, it shows a trend change that first increases and then remains unchanged.

Preferably, in the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots contained in the at least part of the dot distribution surface first increases and then decreases trend change;

The at least part of the dot distribution surface includes a first area, a second area, a third area and a fourth area divided along a direction perpendicular to the intersection line from near to far from the intersection line;

The proportion of outlets in the first area is 5%-10%, the proportion of outlets in the second area is 13%-16%, and the proportion of outlets in the third area is 45%. -50%, the proportion of outlets in the fourth area is 20%-22%.

Preferably, the diameter of the dots in the area with a large dot ratio is not larger than the diameter of the dots in the area with a smaller dot ratio.

Preferably, the dots contained in the dot distribution surface are arranged in multiple rows, and the straight line of dots in each row is not perpendicular to the intersection line;

Wherein, two adjacent rows of network dots are arranged crosswise.

Preferably, any two adjacent rows of dots satisfy: for the first dot and the second dot adjacently arranged in one row, there is a third dot in the other row, wherein the first dot, the second dot and the second dot The line connecting the center points of the three mesh points forms an acute triangle.

Preferably, the line connecting the center points of the first network point, the second network point and the third network point forms an isosceles triangle or an equilateral triangle.

Preferably, the straight line where each row of network dots is located is parallel to the intersection line.

In the second aspect, the embodiment of the present utility model provides a backlight including a light-emitting diode LED light bar, wherein the backlight further includes: the light guide plate provided by the embodiment of the present utility model;

The LED light bar is opposite to the light incident side of the light guide plate body included in the light guide plate.

Preferably, the backlight also includes:

A backplane comprising a bottom plate and a first side wall; wherein, the light guide plate is set on the bottom plate, and the LED light bar is set on the first side wall;

a light bar cover covering all the LED lights in the LED light bar;

A heat dissipation plate comprising a first partial area between the LED light bar and the first side wall, and the first partial area includes a second side wall perpendicular to the first side wall; and the first side wall The two side walls are used as supports for supporting the light bar cover.

Preferably, the heat dissipation plate further includes: a second partial area located below the light guide plate;

The second partial area is used as the bottom plate.

In a third aspect, the embodiment of the present invention provides a display device, including: the backlight provided by the embodiment of the present invention.

Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows:

In an embodiment of the present invention, the light guide plate includes a light guide plate body, and the light guide plate body includes a light-incident side surface and a dot distribution surface, and the dot distribution surface intersects the light-incident side surface, wherein: the dot distribution surface is perpendicular to the dot distribution surface In the direction of the intersection line between the surface and the light-incident side, along the direction from near to far from the intersection line, the dot ratio of at least part of the dots contained in at least some areas of the dot distribution surface tends to increase change, so that at least some of the dots in the distribution plane have a stronger light-exiting property of the dots in the area of the smaller light intensity, so as to improve the uniformity of the light from the light guide plate; thereby improving the uniformity of light introduced into the display screen of the display device, Further, the display quality of the display device is improved.

Description of drawings

Fig. 1 is the structural representation of dot distribution plane in the prior art;

Figures 2a to 2g are structural schematic diagrams of the dot distribution surface of the light guide plate in the embodiment of the present invention;

3a to 3c are top views of the light guide plate in the embodiment of the utility model;

Fig. 4 is a schematic diagram of the changing trend of the network dot ratio of the network dots included in the network dot distribution plane in the embodiment of the present invention;

Fig. 5 is a schematic diagram of the structure of the light bar cover supported by the cooling plate in the embodiment of the utility model.

Detailed ways

In order to clearly illustrate the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

It should be noted that the directional terms mentioned in the present utility model, such as "up" and "down" indicating the direction, are only used to illustrate and understand the utility model with reference to the direction of the drawings, and are not used to limit the implementation of the utility model. Example; moreover, the thickness and shape of each layer of film in the accompanying drawings do not reflect the real scale, and the purpose is only to illustrate the content of the utility model.

Preferably, a light guide plate provided by an embodiment of the present utility model includes a light guide plate body, and the light guide plate body includes a light-incident side surface and a dot distribution surface, and the dot distribution surface intersects the light-incident side surface, wherein:

In the direction perpendicular to the line of intersection between the dot distribution surface and the light-incident side, along the direction from near to far from the line of intersection, the dots of at least part of the dots contained in at least a part of the dot distribution surface The ratio shows an increasing trend, so that at least some of the dots in the area where the light intensity is smaller in the distribution plane have stronger light-extracting properties, so as to improve the uniformity of the light-exiting light of the light guide plate;

Wherein, the dot ratio refers to the ratio of the area occupied by dots in a unit area to the unit area.

In practice, in the direction perpendicular to the intersection line of the dot distribution surface and the light-incident side, along the direction from near to far from the intersection line, at least part of the dot distribution surface includes at least part of the area The dot ratio of the dots tends to increase, so that at least some of the dots in the area where the light intensity is smaller in the at least part of the dots have a stronger light output, so as to improve the uniformity of light output from the light guide plate; thereby improving the import display The uniformity of the light of the display screen of the device, thereby improving the display quality of the display device.

Preferably, the light guide plate body in the embodiment of the present utility model can be a light guide plate body of any structure in the prior art; for example, the light guide plate body is a light guide plate body with a flat plate structure, or the light guide plate body The body is a wedge-shaped light guide plate body.

Preferably, the light guide plate body in the embodiment of the present utility model further includes: a plurality of side surfaces, an upper surface and a lower surface other than the light-incident side;

Wherein, the upper surface of the light guide plate body is generally a light-emitting surface.

Preferably, in the embodiment of the utility model, the positional connection relationship of the dot distribution surface used for deriving the light incident from the light-incident side is connected with the positional connection relationship of the dot distribution surface included in the light guide plate body in the prior art similar;

For example, the dot distribution surface is the lower surface of the light guide plate body; or, the dot distribution surface is located between the upper surface and the lower surface of the light guide plate body, and is parallel to the lower surface of the light guide plate body.

Preferably, in order to improve the uniformity of the light emitted by the light guide plate, the dot ratio of the dots contained in at least a part of the dot distribution surface can be adjusted along the distance from the intersection in the direction perpendicular to the intersection line. The direction of the line from near to far shows an increasing trend; it is also possible that the dot ratio of the dots contained in at least a part of the dot distribution surface of all the dots is along the distance described in the direction perpendicular to the intersection line. The intersection line shows an increasing trend from near to far.

For example, as shown in Figure 2a, the line of intersection between the dot distribution surface 10e and the light incident side is L; in the direction perpendicular to the line of intersection L along the direction from near to far from the line of intersection L, all the dots are distributed The dot ratio of the dots 100 included in the entire area of the plane 10e shows an increasing trend.

In the implementation, in the direction perpendicular to the intersection line between the dot distribution surface and the light-incident side, along the direction from near to far from the intersection line, the dots contained in at least some areas of all the dot distribution surfaces The ratio of the dots in the dots tends to increase, so that the dots in the area where the light intensity is smaller in the distribution plane of all the dots have a stronger light emitting property, so as to comprehensively improve the uniformity of the light emitting from the light guide plate.

For example, as shown in Figure 2b, the line of intersection between the dot distribution surface 10e and the light-incident side is L, and the dot distribution surface 10e includes an area A, an area B, and an area C that are sequentially divided along a direction parallel to the intersection line L , wherein, the area of area B is much larger than the areas of area A and area C; in the direction perpendicular to the intersection line L along the direction from near to far from the intersection line L, the dot ratio of the dots 100 contained in area B It shows an increasing trend, and the proportion of outlets 100 included in area A and area C remains unchanged.

In practice, since the light intensity of the area A and the area C located on both sides of the area B is relatively small and has relatively little influence on the display effect, in order to reduce the complexity of making the dot distribution surface, it is possible to set the area A and the area C to include The proportion of outlets of the outlets remained unchanged.

It should be noted that, in order to improve the uniformity of the light emitted by the light guide plate, when the structure of the light guide plate is different, in the direction perpendicular to the intersection line along the direction from near to far from the intersection line, the The change trends of the outlet proportions of the outlets included in the at least part of the outlet distribution planes may also be different, but the change trends of the outlet ratios of the outlets included in the at least part of the outlet distribution planes all satisfy: the at least part of the outlet distribution planes The proportion of outlets in at least some areas shows an increasing trend; several typical situations will be introduced below.

Case 1: The light guide plate body includes two opposite sides, and one of the sides is the light incident side.

Preferably, the light guide plate body includes two opposite sides, and one of the sides is the light-incident side;

In a direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface tends to increase.

In practice, since the light guide plate body includes two opposite sides, and only one side is the light-incident side, for the light incident from the light-incident side, in the direction perpendicular to the intersection line Along the direction from near to far from the intersection line, the light intensity becomes smaller and smaller; in the direction perpendicular to the intersection line from near to far from the intersection line, by designing at least part of the dots The dot ratio of the dots included in the distribution surface tends to increase, wherein, the larger the dot ratio of the dots, the stronger the light output performance; it is possible to realize the light output of the dots in the area with the smaller light intensity in the distribution plane of at least some dots. The stronger the property is, the uniformity of the light emitted by the light guide plate can be improved.

Taking FIG. 2a as an example, the specific implementation of the first situation in the embodiment of the present invention will be introduced below.

For example, as shown in Figure 2a, the light guide plate body includes two opposite sides, and one of the sides is the light-incident side, and the intersection line between the dot distribution surface 10e and the light-incident side is L; In the direction along the direction from near to far from the intersection line L, the dot ratio of all the dots 100 included in the dot distribution surface 10e tends to increase;

Wherein, in Fig. 2a, the network point ratio of the network points included in all the network point distribution planes is an example of an increasing trend. In the specific implementation, the network point ratio of the network points included in some network point distribution planes is increasing. The implementation manner of is similar to the implementation manner in which the dot ratio of all the dots included in the dot distribution plane shows an increasing trend, and will not be repeated here.

It should be noted that when the structure of the light guide plate in the embodiment of the present invention is as described in Case 1, in the direction perpendicular to the intersection line along the direction from near to far from the intersection line, the The change trend of the proportion of outlets included in at least some of the outlets in the distribution plane is: an increasing trend; that is, the proportion of outlets in the entire area in the at least part of the outlets distribution shows an increasing trend .

Case 2: The light guide plate body includes two opposite sides, and both sides are light-incident sides.

Preferably, the light guide plate body includes two opposite sides, and the two sides are light-incident sides;

In the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface shows a trend of first increasing and then decreasing.

In practice, since the light guide plate body includes oppositely arranged two sides, and both sides are light-incident sides, therefore, for the light incident from the light-incident side, in the direction perpendicular to the intersection line Along the direction from near to far from the intersection line, the light intensity first decreases and then increases; in the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, By designing at least part of the dots included in the dot distribution surface, the proportion of the dots increases first and then decreases, wherein the greater the dot ratio of the dots, the stronger the light output performance; the at least part of the dot distribution surface can be realized The dots in the area with lower inner light intensity have stronger light-extracting property, so that the light-exiting uniformity of the light guide plate can be improved.

Taking FIG. 2c as an example, the specific implementation of the second situation in the embodiment of the present invention will be introduced below.

For example, as shown in Figure 2c, the light guide plate body includes oppositely arranged two sides, and the two sides are light-incident sides, and the intersection line between the dot distribution surface 10e and the light-incident side is L; In the direction of L along the direction from near to far from the intersection line L, the dot ratio of all the dots 100 contained in the dot distribution surface 10e shows a trend of first increasing and then decreasing;

Wherein, in Fig. 2c, it is an example that the proportion of outlets included in all outlets in the outlet distribution surface first increases and then decreases. The embodiment of the trend change after increasing and then decreasing is similar to the embodiment in which the dot ratio of all the dots included in the dot distribution surface first increases and then decreases, and will not be repeated here.

It should be noted that, when the structure of the light guide plate in the embodiment of the present invention is as described in Case 2, in the direction perpendicular to the intersection line along the direction from near to far from the intersection line, the The change trend of the proportion of outlets included in at least some of the outlets in the distribution plane is: a trend of first increasing and then decreasing; that is, the proportion of outlets in some areas of the at least part of the outlets distribution surface is increasing. There is a large trend change, and the proportion of outlets in other areas shows a decreasing trend.

Case 3: The light guide plate further includes: a reflective sheet attached to at least one side of the light guide body except the light-incident side.

Preferably, the light guide plate further includes:

A reflective sheet attached to at least one side of the light guide plate body except the light-incident side. In practice, by attaching a reflective sheet capable of reflecting light on at least one side of the light guide plate body other than the light-incident side, the light emitted by the light source is prevented from being transmitted out of the light guide plate from the side of the light guide plate to which the reflective sheet is attached, Therefore, to a certain extent, the light guide plate can improve the utilization rate of the light emitted by the light source, improve the brightness of the backlight source, and further improve the display quality of the display device.

In practice, since the intensity of the emitted light near the sides other than the light incident side is relatively small compared with the intensity of the emitted light near the light incident side, by attaching The reflective sheet can increase the intensity of emitted light near at least one side except the light-incident side, thereby improving the uniformity of light emitted by the light guide plate.

Preferably, the reflection sheet in the embodiment of the present utility model can be any film in the prior art that can reflect light.

Preferably, the reflective sheet is attached to at least one side of the light guide plate body except the light-incident side;

For example, as shown in Figures 3a to 3c, the light guide plate body 10 is a flat plate structure, which includes four sides; wherein, the light incident side of the light guide plate body 10 is 10a, and the light incident side of the light guide plate body 10 is set opposite to the light incident side. One side is 10b, and the sides of the light guide plate body 10 adjacent to the light incident side are respectively 10c and 10d;

As shown in Figure 3a, the reflective sheet 20 is attached to the side 10b of the light guide plate body 10; that is, the reflective sheet 20 is only attached to one side of the light guide plate body 10 except the light-incident side 10a;

As shown in Figure 3b, the reflection sheet 20 is attached to the side 10c and the side 10d of the light guide plate body 10; that is, the reflection sheet 20 is attached to the two sides of the light guide body 10 except the light incident side 10a;

As shown in Figure 3c, the reflection sheet 20 is attached to the side 10b, side 10c and side 10d of the light guide plate body 10; that is, the reflection sheet 20 is attached to all sides of the light guide body 10 except the light incident side 10a .

In practice, the more side surfaces of the light guide plate body on which the reflective sheets are attached, the higher the utilization rate of the light emitted by the light source by the light guide plate, and the higher the brightness of the backlight source.

Preferably, since the reflective sheet attached to the light guide plate body will reflect the light emitted by the light source, when the sides of the light guide plate body to which the reflective sheet is attached are different, in order to ensure the light guide plate body The uniformity of light emitted from the light-emitting surface and the change trend of the dot ratio of the dots included in the at least part of the dot distribution surface are also slightly different.

The following will take the reflective sheet attached to the side of the light guide plate body opposite to the light-incident side as an example to introduce the change trend of the dot ratio of the dots included in the at least part of the dot distribution surface;

It should be noted that when the side of the light guide plate body to which the reflective sheet is attached is the other side, the change trend of the dot ratio of the dots included in the at least part of the dot distribution surface can be specifically determined by optical simulation, as long as it can be It only needs to ensure the uniformity of the light emitted from the light-emitting surface, and details will not be repeated here.

Preferably, the reflective sheet is attached to a side of the light guide plate body opposite to the light-incident side;

In the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, the dot ratio of the dots included in the at least part of the dot distribution surface shows a trend of first increasing and then decreasing, Or, it shows a trend change that first increases and then remains unchanged.

In practice, since the reflective sheet is attached to a side of the light guide plate body opposite to the light-incident side, for the light incident from the light-incident side, in the direction perpendicular to the intersection line Along the direction from near to far from the intersection line, the light intensity first decreases and then increases; in the direction perpendicular to the intersection line, along the direction from near to far from the intersection line, By designing at least part of the dots included in the dot distribution surface, the proportion of the dots increases first and then decreases, wherein the greater the dot ratio of the dots, the stronger the light output performance; the at least part of the dot distribution surface can be realized The dots in the area with lower inner light intensity have stronger light-extracting property, so that the light-exiting uniformity of the light guide plate can be improved.

In practice, since the intensity of the light incident on the reflective sheet is relatively small for the light incident from the light-incident side, the distance from the intersection line in the direction perpendicular to the intersection line is from near to In the far direction, although the light intensity first decreases and then increases, the subsequent increase is relatively small. Therefore, even if the light intensity first increases and then remains unchanged, it can be largely The uniformity of the light emitted by the light guide plate is improved.

Taking Fig. 3a and Fig. 2d as examples below, the specific implementation of the third situation in the embodiment of the utility model will be introduced.

For example, as shown in FIG. 3a, the reflective sheet 20 is attached to a side 10b of the light guide plate body 10 opposite to the light-incident side;

As shown in Figure 2d, the line of intersection between the dot distribution surface 10e and the light-incident side is L; in the direction perpendicular to the intersection line L along the direction from near to far from the intersection line L, all the dot distribution surfaces 10e The proportion of outlets of the included outlets 100 showed a trend of first increasing and then decreasing;

Wherein, in Fig. 2 d, it is an example that the proportion of outlets contained in all the outlets included in the outlet distribution surface first increases and then decreases. The trend of first increasing and then decreasing, or the proportion of outlets included in at least some of the outlets in the distribution surface shows a trend of first increasing and then remaining unchanged, and all the outlets included in the outlet distribution surface The embodiment in which the percentage of outlets increases first and then decreases is similar and will not be repeated here.

Preferably, the reflective sheet is attached to a side of the light guide plate body opposite to the light-incident side, and in a direction perpendicular to the intersection line, along the distance from near to far from the intersection line direction, the proportion of the outlets contained in the at least part of the outlet distribution surface shows a trend of first increasing and then decreasing;

The at least part of the dot distribution surface includes a first area, a second area, a third area and a fourth area divided along a direction perpendicular to the intersection line from near to far from the intersection line;

The proportion of outlets in the first area is 5%-10%, the proportion of outlets in the second area is 13%-16%, and the proportion of outlets in the third area is 45%. -50%, the proportion of outlets in the fourth area is 20%-22%.

For example, as shown in Figure 4, the horizontal axis represents the area, and the vertical axis represents the proportion of outlets; in the first area, the proportion of outlets is 5%-10%; in the second area, the proportion of outlets is 13%-16%; in the third area, the proportion of outlets is 45%-50%; in the fourth area, the proportion of outlets is 20%-22%.

It should be noted that when the structure of the light guide plate in the embodiment of the present utility model is specifically the structure described in Case 3 where a reflective sheet is attached to the side of the light guide plate body opposite to the light incident side, the In the direction perpendicular to the intersection line and along the direction from near to far from the intersection line, the change trend of the dot ratio of the dots included in the at least part of the dot distribution surface is: first increases and then decreases, or A trend change that first increases and then remains unchanged; that is, the proportion of outlets contained in some areas in the at least part of the outlet distribution surface shows an increasing trend, and the proportion of outlets contained in another part of the area decreases. Small trend changes or stays the same.

It should be noted that, in the embodiment of the present utility model, there is no special requirement on the diameter of each dot, wherein: the diameter of the dot in the area with a large proportion of dots can be greater than, less than or equal to the diameter of the dot in the area with a small proportion of dots .

Preferably, the diameter of the dots in the area with a large dot ratio is not larger than the diameter of the dots in the area with a smaller dot ratio.

For example, as shown in Figure 2e, the line of intersection between the dot distribution surface 10e and the light incident side is L; in the direction perpendicular to the line of intersection L along the direction from near to far from the line of intersection L, all the dots are distributed The proportion of the outlets 100 included in the surface 10e shows an increasing trend;

Wherein, the diameters of the dots 100 are equal, but the number of dots 100 in the area with a large proportion of dots is more than the number of dots 100 in an area with a smaller proportion of dots.

It should be noted that, in the embodiment of the present utility model, the solution of attaching a reflective sheet to at least one side of the light guide plate body except the light incident side as described in the third case can be adopted to improve the light output of the light guide plate. The uniformity of the light from the light guide plate can also be improved by adopting the scheme of the change trend of the dot ratio of the dots included in the design dot distribution surface as described in the case one to case three, so as to improve the uniformity of the light output of the light guide plate; the following will describe the other A solution for improving the uniformity of the light emitted by the light guide plate is introduced.

Preferably, the dots included in the dot distribution surface are arranged in multiple rows, and the straight line of dots in each row is not perpendicular to the intersection line between the dot distribution surface and the light-incident side;

Wherein, two adjacent rows of network dots are arranged crosswise.

In the implementation, by defining the non-perpendicular direction with the intersection line of the network dot distribution surface and the light incident side is the direction where the network dot row is located, and making the adjacent two rows of network dots cross-arranged; to ensure that the adjacent two rows of network dots Complementary, so as to ensure that the light inside the light guide plate is reflected or scattered by the dots as much as possible, so as to ensure that the light emitted from the light-emitting surface of the light guide plate has better uniformity.

Preferably, any two adjacent rows of dots satisfy: for the first dot and the second dot adjacently arranged in one row, there is a third dot in the other row, wherein the first dot, the second dot and the second dot The line connecting the center points of the three mesh points forms an acute triangle.

During implementation, any two adjacent rows of dots satisfy: the line connecting the center points of the first dot, the second dot and the third dot forms an acute triangle; it can ensure that the dots of two adjacent rows are arranged in a staggered manner, thereby improving the light guide plate The uniformity of light emitted from the light-emitting surface.

Preferably, the line connecting the center points of the first network point, the second network point and the third network point can form any acute triangle; for example, an isosceles triangle or an equilateral triangle.

In implementation, when the connecting line of the central points of the first network point, the second network point and the third network point forms an isosceles triangle or an equilateral triangle, the uniformity of the distribution of the network points contained in the network point distribution surface can be further ensured, In order to further improve the complementary effect of dots in two adjacent rows, thereby further improving the uniformity of the light emitted from the light-emitting surface of the light guide plate.

Preferably, the straight line where each row of network dots is located is parallel to the intersection line.

In practice, when the direction parallel to the intersection line is defined as the direction where the grid dot row is located, the complementary effect of the grid dots in two adjacent rows can be further improved, thereby further improving the brightness of the light emitted from the light-emitting surface of the light guide plate. Uniformity.

For example, as shown in Figure 2f, the line of intersection between the network dot distribution surface 10e and the light-incident side is L; the network dots 100 included in the network dot distribution surface 10e are arranged in multiple rows, and the straight line where the network dots 100 of each row is located and the intersection line L are mutually parallel;

Wherein, any two adjacent rows of network dots 100 are arranged crosswise.

In practice, it is possible to ensure that the dots in two adjacent rows are complementary, thereby ensuring that the light inside the light guide plate is reflected or scattered by the dots as much as possible, so as to ensure that the light finally emitted from the light-emitting surface of the light guide plate has better uniformity.

Preferably, the above three schemes for improving the uniformity of the light output from the light guide plate can be implemented separately or in combination; The scheme of the uniformity of the light emitted by the light panel is introduced in conjunction with the specific implementation scheme.

Embodiment one

As shown in FIG. 3a, the reflective sheet 20 is attached to a side 10b of the light guide plate body 10 opposite to the light-incident side;

As shown in Figure 2g, the intersection line between the dot distribution surface 10e and the incident light side is L; the dots 100 included in the dot distribution surface 10e are arranged in multiple rows, and the straight line where the dots 100 in each row are parallel to the intersection line L;

Wherein, any two adjacent rows of dots 100 are arranged crosswise; and,

In the direction perpendicular to the intersection line L along the direction from near to far from the intersection line L, the dot ratios of the dots 100 included in all the dot distribution surfaces 10e show a trend of first increasing and then decreasing.

During implementation, the uniformity of light emitted from the light-emitting surface of the light-guide plate can be improved by attaching a reflective sheet on the side of the light-guide plate body opposite to the light-incident side; any two adjacent rows of dots are arranged crosswise, which can Further improve the uniformity of light emitted from the light-emitting surface of the light guide plate; in the direction perpendicular to the intersection line and along the direction from near to far from the intersection line, the dot ratio of all the dots included in the dot distribution surface is The trend of first increasing and then decreasing can further improve the uniformity of the light emitted from the light emitting surface of the light guide plate.

Preferably, a backlight source provided by an embodiment of the present utility model includes an LED (Light Emitting Diode, light-emitting diode) light bar, wherein the backlight source further includes: the light guide plate provided by an embodiment of the present utility model;

The LED light bar is opposite to the light incident side of the light guide plate body included in the light guide plate.

In practice, the light guide plate of the embodiment of the present invention has a relatively high utilization rate of the light emitted by the light source, so the brightness of the backlight source including the light guide plate of the embodiment of the present invention is relatively high.

In practice, the light emitted from the light emitting surface of the light guide plate according to the embodiment of the present invention has better uniformity, therefore, the brightness of the backlight source including the light guide plate according to the embodiment of the present invention is relatively uniform.

Preferably, the strip circuit board of the LED light bar is made of thermally conductive material, such as Al (aluminum) strips.

In practice, the material of the strip circuit board of the LED light bar is a thermally conductive material, which can improve the heat dissipation effect of the strip circuit board and improve the performance of the LED light bar.

Preferably, the LED light bar can also be other light sources, such as point light source Lamp (bulb), linear light source CCFL (cold cathode fluorescent tube), HCFL (hot cathode fluorescent tube), surface light source VFD (flat Fluorescent lamp), EL (Electroluminescence), OELD (Organic Electroluminescence), or FED (Flat Field Emission).

Preferably, the backlight in the embodiment of the present utility model is a side-type backlight.

Preferably, the backlight in the embodiment of the present utility model further includes:

A backplane comprising a bottom plate and a first side wall; wherein, the light guide plate is set on the bottom plate, and the LED light bar is set on the first side wall;

a light bar cover covering all the LED lights in the LED light bar;

A heat dissipation plate comprising a first partial area between the LED light bar and the first side wall, and the first partial area includes a second side wall perpendicular to the first side wall; and the first side wall The two side walls are used as supports for supporting the light bar cover.

In practice, by using the second side wall included in the heat dissipation plate as a support for supporting the light bar cover, the heat dissipation plate can be integrated with the LED light bar, thereby simplifying the structure of the backlight and Improve the stability of the backlight.

Preferably, the second side wall included in the first partial area of the heat dissipation plate is used to support a light bar cover covering all the LED lights in the LED light bar;

For example, as shown in FIG. 5 , the light bar cover 50 covers all the LED lamps 30 a in the LED light bar 30 , the first part of the cooling plate 40 includes the second side wall 40 a, and the second side wall 40 a is connected to the light bar cover 50 . Contact and support the light bar cover 50 .

Preferably, the heat dissipation plate further includes: a second partial area located below the light guide plate;

The second partial area is used as the bottom plate.

In practice, using the second part of the heat dissipation plate as the bottom plate can save the process of making the bottom plate, reduce the complexity of making the backlight, and reduce the volume of the backlight.

Preferably, the heat dissipation plate is made of thermally conductive material, such as Al, or graphite.

Preferably, the strength of the material of the heat dissipation plate is greater than a set threshold.

In practice, the strength of the material of the heat dissipation plate is greater than a set threshold, which can ensure that the heat dissipation plate has better performance when used as a support and a bottom plate for supporting the light bar cover.

Preferably, the first partial area of the heat dissipation plate is fixed to the first side wall of the back plate, specifically, the first partial area of the heat dissipation plate is fixed to the first side wall of the back plate through threads.

Preferably, the embodiment of the present utility model provides a display device, including the above-mentioned backlight source.

In practice, the brightness of the backlight in the embodiment of the present invention is relatively high, therefore, the display quality of the display device including the backlight in the embodiment of the present invention is relatively good.

In practice, the brightness of the backlight in the embodiment of the present invention is relatively uniform, so the display quality of the display device including the backlight in the embodiment of the present invention is relatively good.

Preferably, the display device may be any product or component with a display function such as a liquid crystal panel, electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, and navigator.

Preferably, the display device further includes: a data driver IC and a gate driver IC;

Wherein, the LED light bar included in the backlight and opposite to the light-incident side of the light guide plate body is located on the same side of the display device as the data driver IC.

In implementation, it can be ensured that the data driving IC and the LED light bar share a circuit board, and when the data driving IC and the LED light bar share the circuit board, the connection between the LED light bar and the shared circuit board is shortened.

It should be noted that the following solutions are also applicable to the embodiments of the present invention: the LED light bar and the grid driver IC are located on the same side of the display device; or, the LED light bar and the grid driver IC respectively located on a set of opposite sides of the display device; or, the LED light bar and the data driver IC are respectively located on a set of opposite sides of the display device.

While preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be interpreted to cover the preferred embodiment and all changes and modifications which fall within the scope of the present invention.

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 (14)

1. a light guide plate, comprises light conducting plate body, and described light conducting plate body comprises light incident sides and network point distribution face, and wherein, described network point distribution face is crossing with light incident sides, it is characterized in that,

In the direction of the intersection perpendicular to described network point distribution face and light incident sides, along the described intersection of distance near to direction far away, the trend that the site accounting of the site of at least part of district inclusion at least part of described network point distribution face is increase changes, make the region that light intensity is less in described at least part of network point distribution face site to go out photosensitiveness stronger, go out uniformity of light to improve described light guide plate;

Wherein, described site accounting refers to area that site in unit area is occupied and the ratio of unit area.

2. light guide plate as claimed in claim 1, is characterized in that, described light conducting plate body comprises the two sides that are oppositely arranged, and wherein a side is light incident sides;

In the direction perpendicular to described intersection, along the described intersection of distance near to direction far away, the trend that the site accounting of the site that described at least part of network point distribution bread contains is increase changes.

3. light guide plate as claimed in claim 1, is characterized in that, described light conducting plate body comprises the two sides that are oppositely arranged, and described two sides are light incident sides;

In the direction perpendicular to described intersection, along the described intersection of distance near to direction far away, the trend that the site accounting of the site that described at least part of network point distribution bread contains is first increases and then decreases changes.

4. light guide plate as claimed in claim 1, is characterized in that, also comprises: the reflector plate that is attached at least one side except light incident sides of described light conducting plate body.

5. light guide plate as claimed in claim 4, is characterized in that, the side being oppositely arranged with light incident sides that described reflector plate is attached at described light conducting plate body;

In the direction perpendicular to described intersection, along the described intersection of distance near to direction far away, the trend that the site accounting of the site that described at least part of network point distribution bread contains is first increases and then decreases changes, or, be and first increase the trend variation remaining unchanged afterwards.

6. light guide plate as claimed in claim 5, it is characterized in that, in the direction perpendicular to described intersection, along the described intersection of distance near to direction far away, the trend that the site accounting of the site that described at least part of network point distribution bread contains is first increases and then decreases changes;

Described at least part of network point distribution bread is contained in perpendicular to first area, second area, the 3rd region and the 4th region along the described intersection of distance from closely marking off to direction far away in the direction of described intersection;

In described first area, the site accounting of site is 5%-10%, in described second area, the site accounting of site is 13%-16%, in described the 3rd region, the site accounting of site is 45%-50%, and in described the 4th region, the site accounting of site is 20%-22%.

7. the light guide plate as described in claim 1～6 any one, is characterized in that, the diameter of the site in the region that site accounting is large is not more than the diameter of the site in the region that site accounting is little.

8. light guide plate as claimed in claim 1, is characterized in that, the site that described network point distribution bread contains is arranged as multirow, and the straight line at place, every row site and described intersection out of plumb;

Wherein, adjacent two row site cross arrangement.

9. light guide plate as claimed in claim 8, it is characterized in that, arbitrary neighborhood two row sites meet: for the first site and second site of adjacent setting in a line wherein, in another row, there is the 3rd site, wherein, the line of the central point of described the first site, the second site and the 3rd site forms oxygon.

10. light guide plate as claimed in claim 9, is characterized in that, the line of the central point of described the first site, the second site and the 3rd site forms isosceles triangle or equilateral triangle.

11. 1 kinds of backlights, comprise LED lamp bar, it is characterized in that, also comprise: the light guide plate as described in claim 1～10 any one;

The light incident sides position of the light conducting plate body that described LED lamp bar comprises with described light guide plate is relative.

12. backlights as claimed in claim 11, is characterized in that, also comprise:

The backboard that comprises base plate and the first side wall; Wherein, described light guide plate is arranged on described base plate, and described LED lamp bar is arranged on described the first side wall;

The lamp bar cover of all LED lamps in coated described LED lamp bar;

Comprise the subregional heat sink of First between described LED lamp bar and described the first side wall, and described Part I district inclusion is perpendicular to the second sidewall of described the first side wall; And described the second sidewall is used as the support member that supports described lamp bar cover.

13. backlights as claimed in claim 12, is characterized in that, described heat sink also comprises: the Part II region that is positioned at the below of described light guide plate;

Described Part II region is used as described base plate.

14. 1 kinds of display device, is characterized in that, comprise the backlight as described in claim 11～13 any one.