Backlight module and display device

Abstract

The present invention provides a backlight module, comprising an optical plate having at least one arc-shaped edge, and a plurality of light-emitting diodes. The plurality of light-emitting diodes are arranged in multiple rows below the optical plate, and the light-emitting diodes closest to the arc-shaped edge are arranged in an arc along the arc-shaped edge, wherein each row of light-emitting diodes is arranged along an axial direction, and another adjacent row of light-emitting diodes is arranged parallel to the axial direction and spaced apart, and at least one row of light-emitting diodes and another adjacent row of light-emitting diodes are arranged in a staggered manner with the axial direction as a reference direction. In this way, the chance of dark shadows being generated at the edge of an irregularly shaped optical plate can be reduced. The present invention also provides a display device comprising the above-mentioned backlight module.

Description

Technical Field

[0001] The invention relates to a light source module, and in particular to a backlight module and its application in a display device. Background Art

[0002] Backlight modules can be divided into two types according to the different incident positions of the light source: edge lighting and bottom lighting. Backlight modules are usually used in various information, communication, and consumer products to provide a surface light source for the liquid crystal display (LCD) of the above products.

[0003] Conventional optical plates are usually rectangular, and the direct-light-incoming light source is a plurality of light-emitting elements arranged in a matrix below the optical plate, so that the brightness of each position of the optical plate at the light-incoming surface is uniform.

[0004] However, when the optical plate has an irregular structure, if the light-emitting elements are still arranged in a matrix, irregular shadows will be generated at the edge of the optical plate, thereby causing uneven overall brightness. Summary of the invention

[0005] Therefore, an object of the present invention is to provide a backlight module for improving the brightness uniformity of a non-rectangular optical plate.

[0006] The backlight module of the present invention comprises an optical plate having at least one arc-shaped edge and a plurality of light-emitting diodes. The plurality of light-emitting diodes are arranged in a plurality of rows below the optical plate, and the light-emitting diodes closest to the arc-shaped edge are arranged in an arc along the arc-shaped edge, wherein each row of light-emitting diodes is arranged along the axial direction, and another adjacent row of light-emitting diodes is arranged parallel to the axial direction and spaced apart, and at least one row of light-emitting diodes and another adjacent row of light-emitting diodes are arranged in a staggered manner with the axial direction as the reference direction.

[0007] Another technical means of the present invention is that the optical plate has an upper side and a lower side spaced apart from the upper side, and at least one arc-shaped edge of the optical plate is located at at least one of the upper side and the lower side.

[0008] Another technical means of the present invention is that the optical plate has two arc-shaped edges, one of which is located on the upper side and is an arc that bends upward, and the other arc-shaped edge is located on the lower side, and the lower side has a left horizontal segment, a right horizontal segment, and a curved segment connected between the left horizontal segment and the right horizontal segment and bending upward.

[0009] Another technical means of the present invention is that any two adjacent light emitting diodes in the same row of light emitting diodes have the same arrangement spacing.

[0010] Another technical means of the present invention is that the arrangement pitch of light emitting diodes in each row is different from the arrangement pitch of light emitting diodes in adjacent rows.

[0011] Another technical means of the present invention is that the projection of each row of light emitting diodes on the optical plate is spaced apart from the upper side and the lower side.

[0012] Another object of the present invention is to provide a display device including the aforementioned backlight module.

[0013] The display device of the present invention comprises the aforementioned backlight module and a display panel arranged on the backlight module.

[0014] The beneficial effect of the present invention is that, by arranging the light emitting diodes, the light emitting diodes near the edge can be arranged along the edge of the optical plate, thereby reducing the chance of dark shadows being generated at the edge of the optical plate with an irregular shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a top view schematic diagram illustrating a preferred embodiment of the backlight module of the present invention;

[0016] Figure 2 It is an auxiliary explanation Figure 1 a schematic side view of

[0017] Figure 3 Yes Description Figure 1 An enlarged schematic diagram of an enlarged situation of the framed portion. DETAILED DESCRIPTION

[0018] The relevant protection scope and technical content of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before the detailed description, it should be noted that similar components are represented by the same number.

[0019] Figure 1 and Figure 2 FIG. 2 shows a preferred embodiment of the backlight module of the present invention. Figure 1 and Figure 2 As shown, the backlight module includes an optical plate 2 and a plurality of light emitting diodes 3. The light emitting diodes 3 are arranged below the optical plate 2. The backlight module is provided with a panel at its light emitting position, thereby forming a display device.

[0020] See also Figure 1The optical plate 2 has an upper side 21 and a lower side 22 spaced apart from the upper side 21, wherein the upper side 21 is an arc that bends upward, and the lower side 22 has a left horizontal section 221, a right horizontal section 222, and a curved section 223 connected between the left horizontal section 221 and the right horizontal section 222 and curved upward. Therefore, the optical plate 2 is formed with two curved edges, one of which is the upper side 21, and the other is located at the lower side 22, namely, the curved section 223. From the shape of the optical plate 2, it can be seen that the preferred embodiment is applied to a non-rectangular optical plate 2 (such as a vehicle dashboard, etc.).

[0021] The light emitting diodes 3 are arranged in multiple rows below the optical plate 2, and the light emitting diodes 3 closest to the arc edge are arranged in an arc along the arc edge. Figure 1 It can be clearly seen from the top view that the LEDs 3 near the upper edge of the optical plate 2 are arranged in an arc shape along the upper side 21 , while the LEDs 3 near the lower edge of the optical plate 2 are arranged in an arc shape along the curved segment 223 of the lower side 22 .

[0022] It is particularly noted that the projection of each row of light-emitting diodes 3 on the optical plate 2 is spaced apart from the upper side 21 and the lower side 22, respectively, and each row of light-emitting diodes 3 is arranged along the axial direction, while another adjacent row of light-emitting diodes 3 is arranged parallel to the axial direction, and at least one row of light-emitting diodes 3 is staggered with another adjacent row of light-emitting diodes 3 with the axial direction as the reference direction.

[0023] See also Figure 3 Since the optical plate 2 is an irregular shape, when arranging the LEDs 3, the total length (L) of each row of LEDs 3 to be arranged on the optical plate 2 should be found first, that is, the vertical distance between the upper side 21 and the lower side 22. According to the shape of the optical plate 2 in this embodiment, the total length (L) of each row of LEDs 3 is not the same. Next, determine the pitch (p) of two adjacent LEDs 3 in the same row of LEDs 3, and the distances (D1, D2) reserved above and below each row of LEDs 3. Then, calculate (LD 1 -D 2 ) / p=Y. Since Y may not be an integer, Y is unconditionally rounded to N. Next, L / N=P is calculated. P is the vertical distance between two adjacent light emitting diodes 3 in the same row of light emitting diodes 3, and the number of light emitting diodes 3 in the row is (N+1).

[0024] From the above calculation method, it can be known that in the same row of LEDs 3, the arrangement pitch of any two adjacent LEDs 3 is the same. Since the upper side 21 is designed to be completely arc-shaped, the arrangement pitch of LEDs 3 in each row is different from the arrangement pitch of LEDs 3 in adjacent rows.

[0025] It can be known from the above preferred embodiments that the backlight module of the present invention, through the aforementioned design, can make the arrangement number of each row of light-emitting diodes 3 change depending on the total length of the distance therebetween, and can make the two rows of light-emitting diodes 3 located at the ends of the multiple rows of light-emitting diodes 3 be arranged along the upper side 21 and the lower side 22, and can make at least one row of light-emitting diodes 3 and another adjacent row of light-emitting diodes 3 be staggered, thereby effectively reducing the chance of dark shadows being generated on the edges of the irregularly shaped optical plate 2, and thus can indeed achieve the purpose of the present invention.

[0026] The above description is only a preferred embodiment of the present invention, and should not be used to limit the scope of implementation of the present invention. That is, any simple equivalent changes and modifications made according to the scope of the patent application and the description of the present invention are still within the scope of the patent of the present invention.

[0027] [List of Reference Numerals]

[0028] 2 Optical Plate

[0029] 21 Upper side

[0030] 22 Lower side

[0031] 221 Left horizontal segment

[0032] 222 right horizontal segment

[0033] 223 curved segment

[0034] 3. Light Emitting Diode

[0035] L Total distance

[0036] D 1 distance

[0037] D 2 distance

Claims

1. A backlight module, comprising: an optical plate having at least one arcuate edge; A plurality of light emitting diodes are arranged in a plurality of rows below the optical plate, and the light emitting diodes closest to the arc-shaped edge are arranged in an arc along the arc-shaped edge, so that the arc shape formed by the arrangement of the light emitting diodes closest to the arc-shaped edge corresponds to the arc shape of the arc-shaped edge. in, Each row of LEDs is arranged along an axial direction, the axial direction is perpendicular to the arrangement direction of the multiple rows of LEDs, another adjacent row of LEDs is arranged parallel to the axial direction and at intervals, and at least one row of LEDs and another adjacent row of LEDs are arranged in an offset manner with the axial direction as the reference direction.

2. The backlight module according to claim 1, in, The optical plate has an upper side and a lower side spaced apart from the upper side, and the at least one arc-shaped edge of the optical plate is located at at least one of the upper side and the lower side.

3. The backlight module according to claim 2, in, The optical plate has two arc-shaped edges, one of which is located on the upper side and is an arc-shaped arc that bends upward, and the other arc-shaped edge is located on the lower side, and the lower side has a left horizontal segment, a right horizontal segment, and a curved segment that is connected between the left horizontal segment and the right horizontal segment and bends upward.

4. The backlight module according to claim 1, in, Any two adjacent light emitting diodes in the same row of light emitting diodes have the same arrangement pitch.

5. The backlight module according to claim 1, in, The arrangement pitch of the light emitting diodes in each row is different from the arrangement pitch of the light emitting diodes in the adjacent rows.

6. The backlight module according to claim 2, in, The projection of each row of light emitting diodes on the optical plate is spaced apart from the upper side and the lower side. 7 . A display device, comprising the backlight module according to claim 1 , and a display panel arranged on the backlight module.

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