Patent ID: 12235488

DETAIL DESCRIPTION OF EMBODIMENTS

In order to make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure will be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of embodiments of the present disclosure. All other embodiments, which may be obtained by one of ordinary skill in the art without any creative effort based on the embodiments in the present disclosure, belong to the protection scope of the present disclosure.

Shapes and sizes of the components in the drawings are not to scale, but are merely intended to facilitate an understanding of the contents of the embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure belongs. The terms “first”, “second”, and the like used in the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used for distinguishing one element from another. Further, the term “a”, “an”, “the”, or the like used herein does not denote a limitation of quantity, but rather denotes the presence of at least one element. The term “comprising”, “including”, or the like, means that the element or item preceding the term contains the element or item listed after the term and its equivalent, but does not exclude other elements or items. The term “connected”, “coupled”, or the like is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect connections. The terms “upper”, “lower”, “left”, “right”, and the like are used only for indicating relative positional relationships, and when the absolute position of an object being described is changed, the relative positional relationships may also be changed accordingly.

FIG.1is a schematic diagram of a structure of an exemplary display apparatus. As shown inFIG.1, the display apparatus includes a display region Q1and a peripheral region Q2surrounding the display region Q1; the display apparatus includes a backlight module and a display panel10positioned on a light outgoing surface of the backlight module. The display panel10may include a first substrate and a second substrate disposed opposite to each other, and a liquid crystal layer formed between the first substrate and the second substrate. The first substrate includes, but is not limited to, an array substrate, and the second substrate includes, but is not limited to, a color filter substrate. The backlight module includes a backplane1, a plastic frame2, an outer frame3, a light guide plate5, a light source component, an optical film6, a reflector4and the like. The backplane1includes a bottom wall11and a side wall12, which are connected together to define an accommodating portion in which the reflector4, the light guide plate5and the optical film6are disposed sequentially in a direction away from the bottom wall11. The light source component may be an LED light bar disposed on the side wall12of the backplane1and opposite to at least one side of the light guide plate5. The plastic frame2includes a retaining wall21and a bearing portion22; the retaining wall21is arranged side by side with the side wall12of the backplane1, and the bearing portion22is connected to the retaining wall21and is positioned on a side of the side wall12of the backplane1and the optical film6, away from the bottom wall11of the backplane1; the bearing portion22of the plastic frame2is used for bearing (supporting) the display panel10. The outer frame3is disposed outside the plastic frame2and the display panel10for fixing the plastic frame2and the display panel10together.

The inventor has found that with a border of the display apparatus becoming narrower and narrower, a distance from an outer edge of the plastic frame2to the display region Q1of the display apparatus is reduced. In this case, after the light emitted through the light guide plate5is irradiated to a first surface S1of the bearing portion22, a part of light exits the display region Q1and enters human eyes, and a dark shadow is formed at the edge of the display screen, and when this phenomenon becomes serious, a part of pixels in the display region Q1of the display panel10are shielded, and the display of the display apparatus is further affected.FIG.2is a schematic diagram of a dark shadow of the display apparatus shown inFIG.1. As may be seen fromFIG.2, in the display apparatus in the related art, after the light is irradiated to the first surface S1of the bearing portion22, a dark shadow occurs at the edge of the display region. It should be noted thatFIG.2illustrates a shadow appearing on a side of the display apparatus where a printed circuit board is located, and correspondingly the same problem may also occur on other sides of the display panel.

In view of the above problems, the following technical solutions are provided in the embodiments of the present disclosure.

In the first aspect,FIG.3is a schematic diagram of a structure of a backlight module and a display panel10according to an embodiment of the present disclosure. As shown inFIG.3, an embodiment of the present disclosure provides a backlight module, forming a display apparatus in cooperation with the display panel10. The backlight module may include a backplane1, a plastic frame2, a reflector4, a light guide plate5, an optical film6, an LED light bar and the like; wherein the backplane1includes a bottom wall11and a side wall12; the bottom wall11of the backplane1is disposed opposite to the display panel10, and the side wall12extends toward the display panel10, and is connected to the bottom wall11, to define an accommodating portion in which the reflector4, the light guide plate5and the optical film6are disposed sequentially in a direction away from the bottom wall11. The plastic frame2includes a retaining wall21and a bearing portion22; the retaining wall21is arranged side by side with the side wall12of the backplane1, and the bearing portion22is connected to the retaining wall21and is positioned on a side of the side wall12of the backplane1and the optical film6, away from the bottom wall11of the backplane1; the bearing portion22includes a first surface S1opposite to the retaining wall21and away from the side wall12of the backplane1. Specifically, in the present embodiment, at least a portion of the first surface S1of the bearing portion22protrudes towards a side close to the retaining wall21(hereinafter referred to as a concave portion).

In the embodiment of the present disclosure, at least a portion of the first surface S1of the bearing portion22of the plastic frame2of the backlight module protrudes towards the side close to the retaining wall21, that is, compared to the related art, at least a portion of the first surface S1may be moved close to a plane where the retaining wall21is located, so that an optical path of the light irradiated to the concave position of the first surface S1is elongated, the intensity of the light is weakened, and the light reflected to the human eye is also reduced, thereby also effectively alleviating the problem of dark shadows.

Referring toFIG.3, in some embodiments, a maximum distance between the first surface S1of the bearing portion22and the retaining wall21is not greater than 7 mm, that is, a maximum width of the plastic frame2is not greater than 7 mm, so that the backlight module according to the embodiment of the present disclosure can realize a narrow border. For example, in some products, the maximum distance from the first surface S1of the bearing portion22to the retaining wall21is about 6 mm; further, in some products, the maximum distance from the first surface S1of the bearing portion22to the retaining wall21is not greater than 5 mm. In an embodiment of the present disclosure, the maximum distance between the first surface S1of the bearing portion22and the retaining wall21may be set to be in a range of about 1.0 mm to 1.2 mm, so as to achieve the narrow border as much as possible.

In some embodiments, the portion of the first surface S1protruding towards the side close to the retaining wall21surrounds in a circumference direction, that is, the first surface S1includes a concave surface protruding towards the side close to the retaining wall21in a circle. Therefore, the reflection of the light irradiated to the first surface S1to human eyes may be reduced as much as possible, and the dark shadow on the display screen in the peripheral region Q2of the display apparatus may be effectively reduced. As an example, the first surface S1includes a concave surface protruding towards the side close to the retaining wall21for description.

In one example,FIG.4is a schematic diagram of a first surface S1according to an embodiment of the present disclosure. As shown inFIGS.3and4, the first surface S1of the bearing portion22of the frame2is stepped in a cross section perpendicular to a plane where the optical film6is located. As an example, the first surface S1of the bearing portion22has one step in the cross section perpendicular to the plane where the optical film6is located for description. Specifically, the first surface S1of the bearing portion22includes a first sub-surface S11and a second sub-surface S12disposed opposite to the retaining wall21, and a first connection sub-surface S13for connecting the first sub-surface S11and the second sub-surface S12. The farthest distances from the first sub-surface S11and the second sub-surface S12to the retaining wall21are different from each other. With continued reference toFIG.3, the farthest distance from the first sub-surface S11to the retaining wall21is greater than the farthest distance from the second sub-surface S12to the retaining wall21. Most of the light emitted through the optical film6irradiates onto the second sub-surface S12, and a small portion of the light irradiates onto the first sub-surface S11, since a distance from the second sub-surface S12to the retaining wall21is shortened compared to the conventional design, the optical path of the light irradiated onto the second sub-surface S12is lengthened and the light intensity is weakened compared to the light irradiated onto the first sub-surface S11. Of the light irradiated onto the second sub-surface S12, the light with a small exit angle from the optical film6is reflected to the peripheral region by the second sub-surface S12and absorbed by a black matrix in the peripheral region; because the light with a large exit angle from the optical film6has a relatively low luminance (as shown inFIG.5, showing a correspondence between the exit angle of the light and the luminance), the optical path of the light irradiated to the second sub-surface S12is lengthened, so that the light intensity is further weakened, and the luminance is lower and is less noticeable to human eyes. Therefore, the amount and the light intensity of the light irradiated to the bearing portion22and reflected to human eyes may be effectively reduced, thereby eliminating and relieving the dark shadows. In addition, as shown inFIG.4, in a direction away from the optical film6, a width W1of the first sub-surface S1may be less than a width W2of the second sub-surface S12. In this way, the light irradiated to the bearing portion22and reflected to the human eye may also be effectively reduced.FIG.6is a schematic diagram of a shadow of a display apparatus adopting the backlight module according to an embodiment of the present disclosure. It may be seen fromFIG.6that the dark shadow is obviously weakened.

For example: in some embodiments, the width W1(hereinafter referred to as width) of the first sub-surface S11in the direction away from the optical film6is not less than 0.8 mm. A maximum width W of the first surface S1of the bearing portion22is 2.1 mm, the width W1of the first sub-surface S11is 0.9 mm, and the width W2of the second sub-surface S12is 1.1 mm; the maximum width W of the first surface S1of the bearing portion22is 2.3 mm, the width W1of the first sub-surface S11is 1.1 mm, and the width W2of the second sub-surface S12is 1.2 mm. The dark shadow at the edge of the display panel10is obviously improved, through verifying the above two sets of data by the inventor.

For example, with continued reference toFIG.3, in some embodiments, the first sub-surface S11and the second sub-surface S12are sequentially disposed in the direction away from the optical film6, and the farthest distance between the first sub-surface S11and the retaining wall21is greater than the farthest distance between the second sub-surface S12and the retaining wall21. The first sub-surface S11and the second sub-surface S12may be substantially parallel or parallel to the plane where the retaining wall21is located, and the first connection sub-surface S13is parallel or substantially parallel to the plane where the optical film6is located. Alternatively, each of the first sub-surface S11and the second sub-surface S12may form an angle with the plane where the retaining wall21is located.

In another example,FIG.7is a schematic diagram of another first surface S1according to an embodiment of the present disclosure. As shown inFIG.7, the first surface S1of the bearing portion22of the plastic frame2is groove-shaped in the cross section perpendicular to the plane where the optical film6is located. Specifically, the first surface S1of the bearing portion22includes a first sub-surface S11, a second sub-surface S12, a third sub-surface S14disposed opposite to the retaining wall21, a first connection sub-surface S13for connecting the first sub-surface S1and the second sub-surface S12, and a second connection sub-surface S15for connecting the second sub-surface S12and the third sub-surface S14. The farthest distance from at least one of the first sub-surface S11and the third sub-surface S14to the retaining wall21is different from the farthest distance between the second sub-surface S12and the retaining wall21. For example: the farthest distances from the first sub-surface S11and the third sub-surface S14to the retaining wall21are equal to each other, and the farthest distance from the first sub-surface S11or the third sub-surface S14to the retaining wall21is greater than the farthest distance from the second sub-surface S12to the retaining wall21. Alternatively, the farthest distances from the first sub-surface S11and the third sub-surface S14to the retaining wall21may be different from each other. In addition, in the direction away from the optical film6, at least one of a width of the first sub-surface S11and a width of the third sub-surface S14may be less than a width of the second sub-surface S12. In this way, the light irradiated to the bearing portion22and reflected to the human eyes may also be effectively reduced.

For example: with continued reference toFIG.7, in some embodiments, the first sub-surface S11, the second sub-surface S12, and the third sub-surface S14are sequentially disposed in the direction away from the optical film6, and the farthest distance from each of the first sub-surface S11and the third sub-surface S14to the retaining wall21is greater than the farthest distance from the second sub-surface S12to the retaining wall21. The first sub-surface S11, the second sub-surface S12, and the third sub-surface S14may be substantially parallel or parallel to the plane where the retaining wall21is located, and both the first connection sub-surface S13and the second connection sub-surface S15are parallel or substantially parallel to the plane where the optical film6is located. Alternatively, each of the first sub-surface S11, the second sub-surface S12, and the third sub-surface S14may alternatively form a certain angle with the plane where the retaining wall21is located.

In another example,FIG.8is a schematic diagram of another structure of a backlight module and a display panel10according to an embodiment of the present disclosure. As shown inFIG.8, the bearing portion22of the frame2includes not only the first surface S1described above, but also a second surface that is adjacent to the optical film6and is disposed opposite to the optical film6. An extending surface of the second surface of the bearing portion22and the plane where the optical film6is located have a dihedral angle therebetween, so that the width of the first sub-surface S1in the direction away from the optical film6is as small as possible, to reduce the light reflected by the first surface S1to the human eyes as much as possible. For example: the dihedral angle α between the extending surface of the second surface of the bearing portion22and the plane where the optical film6is located is less than 5°.

In some embodiments, a matte structure is formed on the first surface S1of the bearing portion22of the plastic frame2, that is, the first surface S1is roughened, so that the specular reflection may be reduced, the diffuse reflection may be increased, and the light irradiated onto the first surface S1may be consumed, so that the light reflected by the first surface S1to the display panel10may be reduced.

The matte structure on the first surface S1may be formed by performing a matte treatment on the first surface S1, or by attaching a matte film layer on the first surface S1.

In some embodiments, the bearing portion22of the plastic frame2and the retaining wall21may have a one-piece structure. For example: the plastic frame2is formed by injection molding.

With continued reference toFIG.8, in some embodiments, a stiffener is formed on the bottom wall11of the backplane1. In some embodiments, the stiffener on the bottom wall11of the backplane1is formed as a stiffener structure through a sheet metal process to increase the strength of the backplane1. In some embodiments, the stiffener has a width in a range of 0.2 mm to 1.5 mm. For example: the width of the stiffener is 0.5 mm, 0.6 mm, 0.8 mm, 1.1 mm, 1.3 mm or the like. Alternatively, the stiffener may not be provided in some products. In an embodiment of the present disclosure, the width of the stiffener structure is not specifically limited, and may be specifically set according to the product requirement. With continued reference toFIG.2, in some embodiments, the optical film6includes a diffuser, a prism sheet, or the like.

As shown inFIGS.3,4,6, and7, in some embodiments, the backlight module includes not only the above structure but also the outer frame3; the outer frame3is disposed outside the plastic frame2and the display panel10, and is used for fixing the display panel10and the plastic frame2together. For example: the outer frame3includes a front frame portion31on the display side of the display panel10, and a side frame portion32provided side by side with the retaining wall21of the plastic frame2.FIG.9is a schematic diagram of another structure of a backlight module and a display panel10according to an embodiment of the present disclosure. As shown inFIG.9, the backlight module may not include the outer frame3, which may further narrow the border of the display apparatus.

In a second aspect, an embodiment of the present disclosure provides a display apparatus, which includes the backlight module and the display panel10. The display panel10is disposed on a side of the bearing portion22of the plastic frame2away from the optical film6. The front frame portion31of the outer frame3is located on the display side of the display panel10.

In the embodiments of the present disclosure, since the display apparatus adopts the backlight module, at least the portion of the first surface S1of the bearing portion22of the plastic frame2of the backlight module protrudes towards the side close to the retaining wall21, that is, compared to the related art, at least the portion of the first surface S1may be moved close to a plane where the retaining wall21is located, so that the light reflected to the human eyes through the first surface S1may be effectively reduced, and the dark shadow on the display screen in the peripheral region Q2of the display apparatus may be effectively reduced, thereby improving the display effect of the display apparatus.

The display apparatus may be: any product or component with a display function, such as a liquid crystal panel, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator and the like.

It should be understood that the above embodiments are merely exemplary embodiments adopted to explain the principles of the present disclosure, and the present disclosure is not limited thereto. It will be apparent to one of ordinary skill in the art that various changes and modifications may be made therein without departing from the spirit and scope of the present disclosure, and such changes and modifications also fall within the scope of the present disclosure.