CN100401534C - Light emitting diode element light emitting device, backlight module and light source adjusting method thereof - Google Patents

Abstract

The invention relates to a light-emitting diode component light-emitting device, which comprises a flexible circuit board and a plurality of light-emitting diode components, wherein a body of the flexible circuit board is in a configuration with a plurality of bending sections, and the light-emitting diode components are arranged on the body of the flexible circuit board comprising the bending sections, so that the light-emitting diode components are linearly arranged on the flexible circuit board.

Description

Light-emitting diode element light-emitting device, backlight module and light source adjustment method thereof

technical field

The invention relates to a light-emitting diode element lighting device; in particular, a light-emitting diode element light-emitting device using a flexible circuit board.

Background technique

In recent years, a liquid crystal display using a liquid crystal panel has been widely used, which can be used as a display screen of an image reproduction device or various data output terminals.

Generally speaking, a liquid crystal display uses a passive matrix type liquid crystal panel or an active matrix type liquid crystal panel with a nonlinear device. These types of liquid crystal panels do not emit light themselves, and an image must be imaged on the liquid crystal panel through a light source. The liquid crystal panel can be divided into two types: transmissive and reflective. The transmissive liquid crystal panel has high brightness and high contrast display characteristics, and is usually widely used in the display screen of the data output terminal. Furthermore, the transmissive liquid crystal panel can be combined with a backlight placed below it as a light source for the transmissive liquid crystal panel. By modulating the light from the backlight, images are imaged on the transmissive liquid crystal panel.

FIG. 1 is a schematic side view of a conventional liquid crystal display with a transmissive liquid crystal panel and a backlight module, wherein the backlight module uses light-emitting diodes as light sources. The backlight module of this traditional liquid crystal display is placed under the transmissive liquid crystal panel, and the light emitted above the backlight module passes through the liquid crystal panel to display images on the liquid crystal panel. Referring to FIG. 1 , the components of this liquid crystal display are as follows: a liquid crystal panel 1 is located between two transparent substrates 1A and 1B, and a polarizer 1C is located on the screen display surface and the back of the liquid crystal panel 1 respectively. A backlight module 3 is located under the liquid crystal panel 1 , which includes a rectangular light guide plate 2 and a light emitting diode module 3A. The light-emitting diode element light-emitting module 3A is located on a side of a light-incident end surface of the light guide plate 2 . A light scattering pattern 10 is formed on the back of the light guide plate 2 by, for example, bump printing. The emitted light of the light-emitting diode element light-emitting module 3A is projected on the light incident end surface of the light guide plate 2, enters the light guide plate, undergoes multiple reflections, and then is guided by the light scattering pattern 10 to output from a light exit surface opposite the back of the light guide plate. , and projected on the back of the liquid crystal panel 1 . Furthermore, a reflection plate 4 is located under the light guide plate 2 for reflecting the beam emitted from the back of the light guide plate 2 back to the inside of the light guide plate 2 . A diffusion sheet 12 or a prism sheet (not shown) is placed between the light guide plate 2 and the liquid crystal panel 1 .

2 is a schematic side view of a light-emitting diode element light-emitting module 3A, which includes a printed circuit board 30 and several light-emitting diode elements 31 in a one-dimensional array arranged on one side of the light-incident end surface of the printed circuit board 30 facing the light guide plate 2. On the surface. With the arrangement of the light guide plate 2 in FIG. 1 , the line light source type of the light emitting module 3A can be converted into a surface light source type for use as a backlight source for the liquid crystal panel 1 . However, since each LED element in the light emitting module 3A has a certain light emitting range, the light intensity distribution of the line light source formed by the light emitting module 3A has a plurality of dark bands D, as shown in FIG. 3 . That is to say, the design of the light emitting module 3A cannot provide a line light source with consistent luminous intensity. When using the light source as the backlight module 3 shown in FIG. 1 , the luminous intensity of each area on the light emitting surface of the top surface of the light guide plate 2 cannot be the same, which affects the luminous uniformity of the light guide plate. On the other hand, since the luminous intensity of each LED element 31 arranged on the printed circuit board 30 is not uniform, the light intensity distribution of the line light source of the light source module 3A is often uneven, and even some areas of the light emitting surface of the light guide plate 2 Insufficient luminous flux.

Accordingly, there is an urgent need to provide an improved light-emitting diode device, which can overcome the shortcomings of conventional light-emitting diode devices.

Contents of the invention

The main purpose of the present invention is to provide a light-emitting diode element light-emitting device, which uses a flexible circuit board to carry several light-emitting diode elements, and uses the flexible circuit board to bend into a configuration with several continuous curved surfaces. The reflector function is provided for each LED element on the flexible circuit board, so as to increase the light-emitting range of each LED element, thereby improving the uniformity of light emission of the light-emitting diode element light-emitting device.

Another object of the present invention is to provide a light-emitting diode element light-emitting device, which can be used as a light source device of a side-light type backlight module, and is conducive to improving the uniformity of light emission of the backlight module.

Yet another object of the present invention is to provide a light source adjustment method for an edge-lit backlight module, which can improve the backlight module by adjusting the relative position between a flexible circuit board and the light guide plate of the light source device in the backlight module. luminous uniformity.

Still another object of the present invention is to provide a light source adjustment method for an edge-lit backlight module, which can improve the uniformity of light emission of the backlight module by adjusting the configuration of a flexible circuit board of the light source device in the backlight module.

According to the above-mentioned purpose, the present invention provides a light-emitting device for light-emitting diode elements, which includes a flexible circuit board and several light-emitting diode elements. A body of the flexible circuit board is in the configuration of several curved sections, and each light-emitting diode element is placed on the body of the flexible circuit board including these curved sections, so that the light-emitting diode elements Arranged linearly on the flexible circuit board. The curved surface of each curved section of the flexible circuit board of the present invention can be a concave curved surface or a convex curved surface, or these curved sections can be arranged alternately with concave and convex curved surfaces. With the help of these curved surfaces on the flexible circuit board of the present invention, the function of reflectors for each LED element carried thereon can be provided, thereby increasing the light-emitting range of each LED element, thereby improving the uniformity of light emission of the light-emitting device of the present invention .

Another aspect of the present invention provides a method for adjusting a light source of an edge-light type backlight module, by which the uniformity of light emission of the backlight module can be improved. The method of the present invention includes adjusting the relative position between a flexible circuit board and a light guide plate of a light-emitting device in the backlight module, detecting the output light intensity values of several detection areas on a light emitting surface of the light guide plate, and calculating the Several differences between these output light intensity values. When these differences are all within a set range, fix the flexible circuit board, and when at least one difference is not within this set range, repeat the above adjustment and detection steps until these differences are all within within this setting range.

Description of drawings

1 is a schematic side view of a traditional liquid crystal display with a transmissive liquid crystal panel and a backlight module;

2 is a schematic side view of a light-emitting diode element light-emitting module used in the backlight module of FIG. 1;

Fig. 3 is a luminous intensity distribution diagram of the light-emitting diode element light-emitting module in Fig. 2;

4A to 4C are schematic side views of a light-emitting diode element light-emitting device according to a first embodiment of the present invention and its variations;

5A to 5C are schematic side views of a light-emitting diode element light-emitting device according to a second embodiment of the present invention and its variation;

6A to 6C are schematic side views of a light-emitting diode element light-emitting device according to a third embodiment of the present invention and its variations;

Fig. 7 is a luminous intensity distribution diagram of the light-emitting diode element light-emitting device of the present invention;

8 is a schematic perspective view of a side-lit backlight module of the present invention;

9 is a schematic perspective view of another side-light type backlight module of the present invention;

FIG. 10 is a flow chart of the light source adjustment method of the side-light backlight module of the present invention.

Explanation of symbols in the figure

1 LCD panel 1A, 1B transparent substrate

2 Light guide plate 3 Backlight module

3A light-emitting diode light-emitting device

4 reflector 10 light scattering pattern

12 diffuser 30 printed circuit board

31 LED components

4A light-emitting diode element lighting device

40 Flexible circuit board 41 Light-emitting diode components

42 transparent adhesive

4B Light-emitting diode element light-emitting device

43 Flexible circuit board 44 Light-emitting diode components

45 transparent adhesive

4C Light-emitting diode element light-emitting device

46 Flexible circuit board 47 Light-emitting diode components

48 transparent adhesive

5A light-emitting diode element lighting device

50 Flexible circuit board 51 Light-emitting diode components

52 transparent adhesive

5B Light-emitting diode element light-emitting device

53 Flexible circuit board 54 Light-emitting diode components

55 Clear Adhesive

5C Light-emitting diode element light-emitting device

56 Flexible circuit board 57 Light-emitting diode components

58 transparent adhesive

6A light-emitting diode element lighting device

60 Flexible circuit board 61 Light-emitting diode components

62 transparent adhesive

6B Light-emitting diode element light-emitting device

63 Flexible circuit board 64 Light-emitting diode components

65 transparent adhesive

6C Light-emitting diode element light-emitting device

66 Flexible circuit board 67 Light-emitting diode components

68 transparent adhesive

80 Edge type backlight module 81 Light guide plate

82 light-emitting diode light-emitting device

811 light incident end face 812 back

813 Light exit surface 90 Side light type backlight module

91 Light guide plate 92 Light-emitting diode light-emitting device

911 light incident end face 912 back

913 Light exit surface 914 Detection area

921 Flexible circuit board 922 Light-emitting diode components

Detailed ways

The invention provides a light-emitting diode element lighting device, which uses a flexible circuit board to carry the light-emitting diode element. By bending the flexible circuit board into various configurations, such as a continuous multi-segment curved surface configuration, the flexible One surface of the permanent circuit board carrying the LED element is designed to have the function of a reflector (reflector), and then the light-emitting range of an LED element carried on each curved surface portion is increased, so that the light-emitting diode element light-emitting device of the present invention can be used. The luminescence is evenly distributed, and the dark zone is eliminated, so as to improve the luminous uniformity of the luminous device.

On the other hand, the present invention bends the flexible circuit board carrying several light-emitting diode elements into a configuration with at least one curved surface. The element serves as a reflector, thereby increasing the luminous brightness of the LED element; this curved surface can be formed on any section of the flexible circuit board, depending on the luminous brightness of each LED element itself.

The light-emitting diode element light-emitting device of the present invention can be used as a light source device of a side-light type backlight module, to improve the uniformity of light emission of this backlight module, and to facilitate the use of the images of liquid crystal displays and transmissive scanners of this backlight Quality improvement. In addition, the light-emitting diode element light-emitting device of the present invention can provide a line light source with good light-emitting uniformity, and can also be used as a light source device for a reflective scanner.

The light-emitting diode element light-emitting device of the present invention will be described in detail as follows through the following specific embodiments in conjunction with the accompanying drawings; wherein only the main components are simplified in the accompanying drawings, and the dimensions of each component are not drawn according to the actual scale, so as to facilitate highlighting Features of the present invention and convenient description.

4A is a schematic side view of an LED device 4A according to a first embodiment of the present invention. The LED device 4A includes a flexible circuit board 40 and several LED devices 41 . The body of the flexible circuit board 40 is in the configuration of several continuous curved sections, and each curved section has a semi-elliptical concave surface for carrying a light emitting diode element 41, so that a plurality of light emitting diode elements are arranged linearly on the flexible circuit board. performance on the printed circuit board 40. The light-emitting diode element 41 is fixed on the semi-elliptical concave surface with transparent adhesive 42, and the semi-elliptical concave surface has the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 41 in all directions toward the flexible circuit board. 40, that is, the light-emitting direction of the light-emitting diode element light-emitting device 4A, thereby increasing the light-emitting range of each light-emitting diode element 41, and can eliminate the light-emitting dark band area originally used to carry the light-emitting diode element on a flat printed circuit board, such as Figure 7 shows. In this way, the LED light emitting device 4A can provide a line light source with good light uniformity.

Furthermore, the light-emitting diode element light-emitting device 4A of the first embodiment of the present invention can have several variations as follows. As shown in FIG. 4B , the body of the flexible circuit board 43 of the light-emitting diode element light-emitting device 4B is in the configuration of several continuous curved sections, and each curved section has a semicircular concave surface for carrying a light-emitting diode element 44 so that a plurality of LED elements are linearly arranged on the flexible printed circuit board 43 . The light-emitting diode element 44 is fixed on the semicircular concave surface with, for example, a transparent adhesive 45. Similarly, the semicircular concave surface can provide the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 44 in all directions toward the flexible surface. The front side of the circuit board 43, that is, the light emitting direction of the light-emitting diode element light-emitting device 4B, thereby increasing the light-emitting range of each light-emitting diode element 44, and can eliminate the light-emitting dark band area. Referring to FIG. 4C, the body of the flexible circuit board 46 of the light-emitting diode element light-emitting device 4C is in the configuration of several continuous curved sections, and each curved section has a parabolic concave surface for carrying a light-emitting diode element 47. so that a plurality of LED elements are linearly arranged on the flexible printed circuit board 46 . The light-emitting diode element 47 is fixed on the parabolic concave surface with, for example, a transparent adhesive 48. Similarly, the parabolic concave surface can provide the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 47 in all directions toward the flexible surface. The front side of the circuit board 46, that is, the light emitting direction of the light-emitting diode element light-emitting device 4C, thereby increasing the light-emitting range of each light-emitting diode element 47, and can eliminate the light-emitting dark band area.

FIG. 5A is a schematic side view of an LED light emitting device 5A according to a second embodiment of the present invention. The light-emitting diode element light-emitting device 5A includes a flexible circuit board 50 and several light-emitting diode elements 51 . The body of the flexible circuit board 50 is in the configuration of several continuous curved sections, and each curved section has a semi-elliptical convex surface for carrying a light emitting diode element 51, so that a plurality of light emitting diode elements are arranged linearly on the flexible circuit board. performance on the printed circuit board 50. The light-emitting diode element 51 is fixed on the semi-elliptical convex surface with transparent adhesive 52. The semi-elliptic convex surface has the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 51 in all directions toward the flexible circuit board. 50 front, that is, the light-emitting direction of the light-emitting diode element light-emitting device 5A, thereby increasing the light-emitting range of each light-emitting diode element 51, and can eliminate the light-emitting dark band area originally used to carry the light-emitting diode element on a flat printed circuit board, such as Figure 7 shows. In this way, the LED light emitting device 5A can provide a line light source with good light uniformity.

Furthermore, the light-emitting diode element light-emitting device 5A of the second embodiment of the present invention can have several variations as follows. Referring to FIG. 5B, the body of the flexible circuit board 53 of the light-emitting diode element light-emitting device 5B is in the configuration of several continuous curved sections, and each curved section has a semicircular convex surface for carrying a light-emitting diode element 54. so that a plurality of LED elements are linearly arranged on the flexible printed circuit board 53 . The light-emitting diode element 54 is fixed on the semicircular convex surface with, for example, a transparent adhesive 55. Similarly, the semicircular convex surface can provide the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 54 in all directions toward the flexible surface. The front side of the circuit board 53, that is, the light emitting direction of the light-emitting diode element light-emitting device 5B, thereby increasing the light-emitting range of each light-emitting diode element 54, and can eliminate the light-emitting dark band area. Referring to FIG. 5C, the body of the flexible circuit board 56 of the light-emitting diode element light-emitting device 5C is in the configuration of several continuous curved sections, and each curved section has a parabolic convex surface for carrying a light-emitting diode element 57. so that a plurality of LED elements are linearly arranged on the flexible printed circuit board 56 . The light-emitting diode element 57 is fixed on the parabolic convex surface by, for example, a transparent adhesive 58. Similarly, the parabolic convex surface can provide the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 57 in all directions toward the flexible surface. The front side of the circuit board 56, that is, the light emitting direction of the light-emitting diode element light-emitting device 5C, thereby increasing the light-emitting range of each light-emitting diode element 57, and can eliminate the light-emitting dark band area.

FIG. 6A is a schematic side view of an LED light emitting device 6A according to a third embodiment of the present invention. The light emitting diode element light emitting device 6A includes a flexible circuit board 60 and several light emitting diode elements 61 . The body of the flexible circuit board 60 is in the configuration of several continuous curved sections. These continuous curved sections include several sections of continuous curved surfaces, which are composed of several elliptical concave curved surfaces and several elliptical convex curved surfaces arranged alternately. Each LED element 61 is placed on a curved surface of a curved section of the flexible circuit board 60 , so that the LED elements 61 are arranged linearly on the flexible circuit board 60 . The light-emitting diode element 61 is fixed on each curved surface by, for example, a transparent adhesive 62. This curved surface has the effect of a reflective surface, which can reflect the light emitted by the light-emitting diode element 61 in all directions toward the front of the flexible circuit board 60, that is, the light-emitting diode The light-emitting direction of the element light-emitting device 6A further increases the light-emitting range of each LED element 61 , and can eliminate the light-emitting dark band area originally used to carry the LED element on a flat printed circuit board, as shown in FIG. 7 . In this way, the LED light emitting device 6A can provide a line light source with good light uniformity.

Furthermore, the light-emitting diode element light-emitting device 6A of the third embodiment of the present invention can have several variations as follows. Referring to FIG. 6B, the body of the flexible circuit board 63 of the light-emitting diode element light-emitting device 6B is in the configuration of several continuous curved sections, and these continuous curved sections include several sections of continuous curved surfaces arranged alternately. It consists of a semicircular concave surface and several semicircular convex surfaces. Each LED element 64 is placed on a curved surface of a curved section of the flexible circuit board 63 , so that the LED elements 64 are arranged linearly on the flexible circuit board 63 . The light emitting diode element 64 is fixed on each curved surface with, for example, a transparent adhesive 65. Similarly, this curved surface can provide the effect of a reflective surface, which can reflect the light emitted by the light emitting diode element 64 in all directions toward the front of the flexible circuit board 63. , that is, the light-emitting direction of the light-emitting diode element light-emitting device 6B, thereby increasing the light-emitting range of each light-emitting diode element 64, and can eliminate the light-emitting dark band area. Referring to FIG. 6C, the body of the flexible circuit board 66 of the light-emitting diode element light-emitting device 6C is in the configuration of several continuous curved sections, and these continuous curved sections include several sections of continuous curved surfaces arranged alternately. It consists of a parabolic concave surface and several parabolic convex surfaces. Each LED element 67 is placed on a curved surface of a curved section of the flexible circuit board 66 , so that the LED elements 67 are arranged linearly on the flexible circuit board 66 . The LED element 67 is fixed on each curved surface with, for example, a transparent adhesive 68. Similarly, this curved surface can provide the effect of a reflective surface, which can reflect the light emitted by the LED element 67 in all directions toward the front of the flexible circuit board 66. , that is, the light-emitting direction of the light-emitting diode element light-emitting device 6C, thereby increasing the light-emitting range of each light-emitting diode element 67, and can eliminate the light-emitting dark band area.

The light-emitting diode element light-emitting device of the present invention can be used as a light source device of a side-light type backlight module. As shown in FIG. 8 , the side-lit backlight module 80 includes a light guide plate 81 and a light-emitting device 82 for LED elements of the present invention. The body of the light guide plate 81 can be selected from any of the following configurations: wedge, rectangle, trapezoid and symmetrical double wedge. Taking the rectangular light guide plate 81 as an example, it has at least a light incident end surface 811 , a back surface 812 and a light exit surface 813 . The back surface 812 of the light guide plate 81 has a light scattering pattern (not shown) for guiding the light beam transmitted inside the light guide plate 81 to output from the light emitting surface 813 thereof. The light-emitting diode element light-emitting device 82 is located on the light-incident end surface 811 side of the light guide plate 81, and the light-emitting diode element light-emitting device 82 can be any one of FIGS. 4A to 4C, 5A to 5C and 6A to 6C of the present invention. Light-emitting diode element light-emitting device. The light emitting device 82 of the present invention provides a line light source with good light uniformity and projects it on the light incident end surface 811 of the light guide plate 81 , which can improve the light uniformity of the light exit surface 813 of the light guide plate 81 .

The light-emitting diode element light-emitting device of the present invention changes the configuration of the flexible circuit board by means of bending, so as to provide the reflector effect for the light-emitting diode elements carried on it, so as to increase the light-emitting range of each light-emitting diode element. The light-emitting diode element light-emitting device of the present invention does not increase the complexity of its own structure, and is easy to manufacture and achieve. When the light-emitting device of the present invention is used as a light source of a side-light backlight module, it not only helps to improve the uniformity of light emission of the backlight module, but also does not significantly increase the manufacturing cost of the backlight module, which is of great economic value.

On the other hand, the present invention provides a method for adjusting the light source of the side-light backlight module by virtue of the easy-bending characteristics of the flexible circuit board used in the light-emitting diode element light-emitting device of the present invention. Referring to FIG. 9 and FIG. 10 , the light source adjustment method of the present invention will be described in detail below. First, in step 100 , a side-light backlight module 90 is provided, and the side-light backlight module 90 includes a light guide plate 91 and a light-emitting diode device 92 . The light guide plate 91 has at least a light incident surface 911 , a back surface 912 and a light exit surface 913 . The back 912 of the light guide plate 91 has a light scattering pattern (not shown) for guiding the light beam transmitted inside the light guide plate 91 to output from the light emitting surface 913 , and the light emitting surface 913 has several output light intensity detection areas 914 . The light-emitting diode element light-emitting device 92 is located on the light incident end surface 911 side of the light guide plate 91. The light-emitting diode element light-emitting device 92 includes a flexible circuit board 921 and several light-emitting diode elements 922 are arranged linearly on the flexible circuit board 921 toward Light is incident on one surface of the end surface 911 of the light guide plate 91 . In step 102, the relative position between the flexible circuit board 921 and the light guide plate 91 is adjusted, and the adjustment methods may include the following: move the flexible circuit board 921 left and right along the X-axis direction; The circuit board 921 moves left and right along the X-axis direction and rotates; moves the flexible circuit board 921 left and right along the Y-axis direction; moves the flexible circuit board 921 left and right along the Y-axis direction and rotates; moves the flexible circuit board 921 along the Move up and down in the Z-axis direction; move the flexible circuit board 921 up and down along the Z-axis direction and rotate; fix one end A of the flexible circuit board 921, and bend the other end B of the flexible circuit board 921 in the Y-axis direction ; Fix one end A of the flexible circuit board 921, twist the other end B of the flexible circuit board 921 to the Z-axis direction; fix the two ends A and B of the flexible circuit board 921, and twist the flexible circuit board 921 The center C of the flexible circuit board is bent toward the Y-axis direction; the center C of the flexible circuit board 921 is fixed, and the two ends A and B of the flexible circuit board are bent toward the same direction of the Y-axis; the flexible circuit board 921 is fixed Center C, bend the two ends A and B of the flexible circuit board toward the opposite direction of the Y axis; fix the center C of the flexible circuit board 921, and bend the two ends A and B of the flexible circuit board toward the Z axis Twist in the same direction; fix the center C of the flexible circuit board 921, and twist the two ends A and B of the flexible circuit board toward the opposite direction of the Z axis. Next, in step 104 , several output light intensity values of the detection areas 914 on the light emitting surface 913 of the light guide plate 91 are detected. In step 106, calculate several differences between these output light intensity values, when these differences are all within a set range, then fix the flexible circuit board 921; when at least one difference is not set here If the difference is within a certain range, repeat steps 102 to 104 until the differences are all within the set range, and then fix the flexible circuit board 921. In this way, the lighting uniformity of the backlight module can be improved by using the light source adjustment method of the side-light type backlight module 90 . In short, the light source adjustment method of the side-light type backlight module of the present invention can adjust the configuration of the corresponding flexible circuit board 921 to change the load-bearing The luminous brightness of the light-emitting diode elements improves the luminous flux in these areas.

The above descriptions are only specific embodiments of the present invention, and are not intended to limit the protection scope of the present invention; all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in the claims within range.

Claims (24)

1. a light-emitting diode light-emitting device is characterized in that, comprising:

One flexible circuit board, its body is the configuration with at least one curved section; And

Several light-emitting diodes are positioned over this flexible circuit board and comprise on this body of this curved section, make these light-emitting diodes be linear array on this flexible circuit board;

The described flexible circuit board that wherein has described curved section reflects the light that described light-emitting diode sends, so that the reverberation of described light-emitting diode has uniform luminous intensity.

2. light-emitting diode light-emitting device as claimed in claim 1, a curved surface of this curved section of wherein above-mentioned flexible circuit board is concave curved surface.

3. light-emitting diode light-emitting device as claimed in claim 2, this concave curved surface of this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

4. light-emitting diode light-emitting device as claimed in claim 1, a curved surface of this curved section of wherein above-mentioned flexible circuit board is convex surface.

5. light-emitting diode light-emitting device as claimed in claim 4, this convex surface of this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

6. a light-emitting diode light-emitting device is characterized in that, comprising:

One flexible circuit board, its body is the configuration of several curved section, and these curved section comprise several sections curved surfaces and are made of several concave curved surfaces and the convex surface of interlaced arrangement; And

Several light-emitting diodes are positioned over this flexible circuit board and comprise on this body of these curved section, so that these light-emitting diodes are linear array on this flexible circuit board;

The described flexible circuit board that wherein has described curved section reflects the light that described light-emitting diode sends, so that the reverberation of described light-emitting diode has uniform luminous intensity.

7. light-emitting diode light-emitting device as claimed in claim 6, this concave curved surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

8. light-emitting diode light-emitting device as claimed in claim 6, this convex surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

9. the side light type backlight module of a tool light-emitting diode light-emitting device is characterized in that, comprising:

One light guide plate has at least one light-incident end, a back side and a light-emitting face, and this back side has a light scattering pattern and is transmitted in the light beam of this light guide plate inside for guiding from this light-emitting face output; And

One light-emitting diode light-emitting device, be positioned at this light-incident end one side of this light guide plate, this light-emitting diode light-emitting device comprises a flexible circuit board and several light-emitting diodes, wherein a body of this flexible circuit board is the configuration with several sections curved section, and these light-emitting diodes are positioned over this flexible circuit board and comprise on this body of these curved section, so that these light-emitting diodes are linear array on this flexible circuit board;

The described flexible circuit board that wherein has described curved section reflects the light that described light-emitting diode sends, and has uniform luminous intensity so that the reflection of described light-emitting diode enters the light of described light guide plate.

10. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 9, a curved surface of each this curved section of wherein above-mentioned flexible circuit board is concave curved surface.

11. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 10, this concave curved surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

12. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 9, a curved surface of each this curved section of wherein above-mentioned flexible circuit board is convex surface.

13. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 12, this convex surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

14. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 9, the configuration of wherein above-mentioned light guide plate be selected from following any one: sphenoid, cuboid, prismatoid and symmetric double sphenoid.

15. comprising several sections curved surfaces, the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 9, these curved section of wherein above-mentioned flexible circuit board constitute by several concave curved surfaces and the convex surface of interlaced arrangement.

16. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 15, this concave curved surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

17. the side light type backlight module of tool light-emitting diode light-emitting device as claimed in claim 15, this convex surface of each this curved section of wherein above-mentioned flexible circuit board is selected from following arbitrary configuration: half elliptic, semicircle and parabola shaped.

18. the light source adjustment method of a side light type backlight module is characterized in that, comprising:

One side light type backlight module is provided, this side light type backlight module comprises a light guide plate and a light-emitting diode light-emitting device, this light guide plate has at least one light-incident end, one back side and a light-emitting face, this back side has a light scattering pattern and is transmitted in the light beam of this light guide plate inside for guiding from this light-emitting face output, and this light-emitting face has several output light intensity surveyed areas, this light-emitting diode light-emitting device is positioned at this light-incident end one side of this light guide plate, this light-emitting diode light-emitting device comprise a flexible circuit board and several light-emitting diodes be linear array in this flexible circuit board on a surface of this light-incident end;

Adjust the relative position between this flexible circuit board and this light guide plate;

Detect several output light intensity values of these surveyed areas of this light-emitting face of this light guide plate; And

Calculate several differences between these output light intensity values, when these differences all in a setting range, then fix this flexible circuit board, when at least one difference not in this setting range, then repeat above-mentioned adjustment and detect step, until these differences all in this setting range.

19. comprising, the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate fix this flexible circuit board one end and with the bending of the other end of this flexible circuit board.

Fix this flexible circuit board one end and the other end of this flexible circuit board is reversed 20. the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate comprise.

21. the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate comprise the two ends of fixing this flexible circuit board and with the center bending of this flexible circuit board.

22. the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate comprise the center of fixing this flexible circuit board and with the two ends of this flexible circuit board towards an equidirectional bending.

23. the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate comprise the center of fixing this flexible circuit board and with the two ends of this flexible circuit board towards rightabout bending each other.

24. the light source adjustment method of side light type backlight module as claimed in claim 18, the step of the relative position between this flexible circuit board of wherein above-mentioned adjustment and this light guide plate comprise the center of fixing this flexible circuit board and the two ends of this flexible circuit board are reversed.

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