JP5397112B2 - Backlight device and display device - Google Patents

Description

The present invention relates to a backlight device and a display device that illuminate a liquid crystal panel.

  Conventionally, in a backlight device formed by mounting a plurality of backlight light sources (LED chips) on a substrate, each LED chip is usually provided in an LED package. When mounting, it is necessary to take out the LED chip from the LED package and then place and mount each on a flat substrate. Therefore, there is a problem that it takes time to mount. Moreover, since a flat board | substrate requires a certain amount of thickness, there existed a difficulty in the heat radiation from the LED chip resulting from this thickness to the exterior of a housing | casing.

  Therefore, for example, a plurality of backlight light sources (flip chip LED elements) are arrayed and mounted on one surface of a flexible printed wiring board extending along a predetermined extending direction, and the flip chip LED element is mounted. There is known a light source device capable of cutting the flexible printed wiring board for each repeating unit (see, for example, Patent Document 1).

JP 2005-302712 A

  According to the invention described in Patent Document 1, since the flip-chip LED elements are only arrayed and mounted on one surface of the flexible printed wiring board, the bare-chip LED elements are covered with mold resin or translucent sealing resin. Compared with the configuration in which the array mounting is performed in a state of being mounted, the mounting portion of the backlight light source can be made thinner by the amount not including the mold resin or the translucent sealing resin.

  However, when the light source device described in Patent Document 1 is used as a backlight device or the like for a liquid crystal display device, flexible printed wiring boards must be arranged one by one in accordance with the display area of the liquid crystal panel, which is complicated. . Further, since the illumination direction of the flip chip LED element is only the direction orthogonal to the back surface of the liquid crystal panel, it cannot be said that the liquid crystal panel can be illuminated efficiently.

An object of the present invention is to provide a backlight device and a display device that are easier to mount and can efficiently illuminate a liquid crystal panel.

In order to solve the above-mentioned problem, the invention according to claim 1 is a backlight device that illuminates the back side of the liquid crystal panel with light emitted from the backlight light source, and a plurality of the backlight light sources are arranged along the longitudinal direction. A flexible film substrate having a plurality of light source rows in the width direction, a first wiring portion disposed on the film substrate and connecting each backlight light source in series, and one end of the first wiring portion being the other end A second wiring portion that is routed to the backlight light source, a backlight portion configured by repeating the same wiring pattern in units of the backlight light source, and a drive circuit portion that drives the backlight light source, and the film The board | substrate is arrange | positioned in the state bent between light source rows, It is characterized by the above-mentioned.

According to a second aspect of the present invention, in the backlight device according to the first aspect, the film substrate is provided with a cutting portion for separating the backlight light source by an arbitrary number, and is cut by the cutting portion. And the first wiring part and the second wiring part are configured to be separated while maintaining the function, and the first wiring part and the second wiring part are connected in the separated state. And an anode terminal connected to the anode terminal of the first wiring and a cathode terminal connected to the cathode terminal of the second wiring on the same side of the film substrate, and the first wiring portion, The second wiring portions are adjacently arranged in parallel .

According to a third aspect of the present invention, in the backlight device according to the first or second aspect, in the backlight substrate, the longitudinal direction position of one backlight light source in the backlight light source row adjacent to the film substrate is the other backlight. Each light source row is arranged on the film substrate so as to be different from the position of the light source in the longitudinal direction, and sprocket holes as through holes are formed at predetermined intervals along the longitudinal direction at both ends in the short direction of the film substrate. It is provided .

According to a fourth aspect of the present invention, in the display device, the display panel, a flexible film substrate including a plurality of light source arrays in the width direction in which a plurality of backlight light sources are arranged along the longitudinal direction, and the film substrate are provided on the film substrate. A first wiring part arranged in series and connecting the respective backlight light sources in series; and a second wiring part for routing one end of the first wiring part to the other end, and having the same wiring pattern for each backlight light source unit A backlight unit configured by repetition; and a drive circuit unit configured to drive the backlight light source, wherein the film substrate is disposed in a state where the light source columns are bent. .

According to the present invention, a plurality of light source arrays in which a plurality of backlight light sources are arranged on a film substrate are provided in the width direction, and the film substrates are arranged at predetermined intervals on the film arrangement unit. That is, since a plurality of light source columns can be arranged at a time according to the display area of the liquid crystal panel, the mounting effort is reduced. Furthermore, each film substrate is supported in a state where the light source row is bent by the bending support portion, and the light from each backlight light source arranged on the film substrate is from a direction orthogonal to the back surface of the liquid crystal panel. The light is emitted in a direction inclined by a predetermined angle. That is, compared to the case where the light is emitted in a direction perpendicular to the back surface of the liquid crystal panel, the light emitted in the inclined direction can be more widely dispersed in the back surface when reaching the back surface of the liquid crystal panel. it can.
Therefore, the present invention can be said to be a backlight device and a display device that are easier to mount and can efficiently illuminate the liquid crystal panel.

It is a block diagram which illustrates the principal part structure of the liquid crystal display device which concerns on this invention. It is a figure which illustrates the backlight apparatus which concerns on this invention typically, (A) shows a side view, (B) shows a top view, respectively. It is a figure explaining the state which cut | disconnected the film substrate which concerns on this invention along a cutting line, (A) is a top view, (B) shows the schematic diagram of the circuit arrangement structure inside a film substrate, respectively. It is a figure which illustrates typically the film group concerning the present invention. It is a figure which illustrates typically the drive circuit part concerning the present invention. It is a figure which illustrates another backlight apparatus which concerns on this invention, (A) shows a side view, (B) shows a top view, respectively.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The scope of the invention is not limited to the illustrated example. In the following description, the left-right direction of the backlight device shown in FIG. 2 is the X direction, the front-rear direction is the Y direction, and the direction orthogonal to the XY direction is the Z direction.

  For example, as shown in FIG. 1, the liquid crystal display device 100 of the present embodiment includes a signal input unit 1 that receives an external video signal, a video processing unit 2 that performs predetermined video processing on the video signal, and a timing signal. A timing control unit 3 that generates a video signal; a frame memory 4 that stores video signals in units of frames; a liquid crystal panel 5 that performs a writing operation to each pixel based on the video signal; and a scanning line provided in the liquid crystal panel 5 is driven. The scanning line driving unit 6, the signal line driving unit 7 for driving the signal lines provided on the liquid crystal panel 5, the backlight device 8 for illuminating the liquid crystal panel 5 from the back side, and the liquid crystal display device 100 are integrated and controlled. And a control unit 12 for performing the above.

  The signal input unit 1 includes, for example, an antenna and a tuner for receiving a television broadcast signal, various video terminals for receiving a video signal from an external device, and the like. Output to the processing unit 2.

  The video processing unit 2 includes, for example, an A / D conversion circuit, an RGB generation circuit, an image quality adjustment circuit, and the like, and generates an RGB digital video signal based on the video signal supplied from the signal input unit 1. Then, a scaling process corresponding to the number of pixels of the liquid crystal panel 5 is performed to generate a video signal for one frame. Furthermore, after performing various image quality adjustments such as brightness, contrast, color density, hue, and sharpness on the image signal for one frame based on the image quality adjustment signal output from the control unit 12, the frame memory 4 is output.

  The timing control unit 3 generates, for example, a timing signal indicating one line period and a timing signal indicating one frame period based on the video signal supplied from the signal input unit 1, and each unit of the liquid crystal display device 100. To supply.

  For example, the frame memory 4 stores the video signal input from the video processing unit 2 in units of frames and outputs the video signal to a liquid crystal display (not shown).

The liquid crystal panel 5 is formed, for example, by enclosing liquid crystals arranged in a matrix between a pair of substrates arranged at a predetermined interval. The pair of substrates is sandwiched between two polarizing plates whose polarization axes are orthogonal to each other, and a backlight device 8 is disposed on the back side. In addition, the liquid crystal panel 5 includes a plurality of sub-display areas that are equally divided in a matrix, for example, in a division method in which the display area is determined in advance.
On the upper surface of the substrate, p rows of scanning lines X (X _{1 to} X _p ) and q columns of signal lines Y (Y _{1 to} Y _q ) are arranged so as to be orthogonal to each other. The liquid crystal panel 5 employs, for example, an active matrix driving method, and a thin film transistor (TFT) as an active element is disposed at each intersection pixel of the scanning line X and the signal line Y. . A pixel electrode is formed in each pixel, and a counter electrode is formed on the opposing substrate so as to face the pixel electrode. An alignment film is formed on the opposing surfaces of the pixel electrode and the counter electrode. That is, the liquid crystal panel 5 is driven in accordance with the timing signal generated by the timing control unit 3 by turning on / off the TFT, accumulating charges in the pixel electrodes, and changing the liquid crystal alignment direction. The video signal input from 1 is written.

The scanning line driving unit 6 is provided corresponding to each of the scanning lines X (X _{1 to} X _p ) in the liquid crystal panel 5, for example, and sequentially outputs each scanning line X according to the timing signal from the timing control unit 3. Select and turn on / off the TFTs connected to the same scanning line X.

The signal line driving unit 7 is provided corresponding to each of the signal lines Y (Y _{1 to} Y _q ) in the liquid crystal panel 5, for example, and is synchronized with the scanning of each scanning line X by the scanning line driving unit 6. A voltage corresponding to the video signal or black image output from the frame memory 4 is applied to the signal line Y.
Therefore, when the scanning line X and the signal line Y are driven by the scanning line driving unit 6 and the signal line driving unit 7, the TFTs of the pixels at the intersections thereof are turned on and charges are accumulated in the pixel electrodes. The alignment direction of the liquid crystal sandwiched between the pixel electrode and the counter electrode is changed, and the light emitted from the backlight device 8 provided on the back side of the liquid crystal panel 5 together with the alignment film and the polarizing plate is converted into the pixel. Pass or block in units.

  The backlight device 8 includes, for example, a film support portion 81 (film placement portion) disposed on the back side of the liquid crystal panel 5 and a Y-axis direction inside the film support portion 81 as shown in FIGS. A plurality of LED chips 88 (Light-Emitting Diodes) as backlight light sources mounted on the film substrate 83, and a drive circuit unit for driving the LED chips 88. 89, and the back side of the liquid crystal panel 5 is evenly illuminated with the light emitted from the LED chip 88 and functions as a backlight of the liquid crystal panel 5.

The film support portion 81 is a member having a plane area substantially equal to the display area of the liquid crystal panel 5 at a position facing the back surface of the liquid crystal panel 5, for example. And the film support part 81 is a predetermined space | interval along the Y-axis direction (width direction of the film substrate 83) of the film board | substrate 83 provided with two or more LED chips 88 so that the back surface of the liquid crystal panel 5 may be illuminated uniformly. It is comprised so that arrangement | positioning can be carried out side by side, and the upper surface is opened by the opening part 81a. Then, on the inner bottom surface 81 b of the film support portion 81, the film is arranged such that light from the LED chip 88 of the film substrate 83 disposed is emitted in a direction inclined at a predetermined angle from the direction orthogonal to the back surface of the liquid crystal panel 5. A bending support portion 81c that supports the substrate 83 in a state of being folded in a mountain shape is provided for each position where the film substrate 83 is supported.
Here, the bent support portion 81c is in contact with the back surface of the film substrate 83 that is bent in a mountain shape, and protrudes upward (in the Z-axis direction) so as to support the film substrate 83. It is.

The film substrate 83 is made of a film member having a thickness of about a micrometer order, excellent heat dissipation, and flexibility. The film substrate 83 includes LED rows 83a and 83b (light source rows) in which a plurality of LED chips 88 are arranged at equal intervals in the X-axis direction (longitudinal direction of the film substrate) arranged in the width direction (Y-axis direction). It is bent at the center between the LED rows 83a and 83b (the wavy line in FIG. 2B) to form a mountain shape. And when the film board | substrate 83 is mounted in the film support part 81, the chevron-shaped back surface side is contact | abutted and supported by the bending support part 81c, and the said bent state is maintained.
Therefore, the film substrate 83 is supported in a mountain shape as described above, so that the light from each LED chip 88 is only an angle α from the direction orthogonal to the back surface of the liquid crystal panel 5 as shown in FIG. The light is emitted in an inclined direction. Therefore, compared to the case where the light is emitted in a direction orthogonal to the back surface of the liquid crystal panel 5 (that is, the angle α = 0 °), the light emitted in the inclined direction reaches the back surface of the liquid crystal panel 5. At this time, since it is more widely dispersed in the back surface, the back surface of the liquid crystal panel 5 can be efficiently illuminated.
As shown in FIG. 3A, sprocket holes 83d as through holes are provided at predetermined intervals in the X-axis direction at both ends of the film substrate 83 in the Y-axis direction. Therefore, for example, by forming a plurality of projections (not shown) that fit into the sprocket holes 83d on the inner bottom surface 81b of the film support portion 81, the film substrate 83 can be easily fixed to the film support portion 81.
The film substrate 83 includes, as shown in FIG. 4, a film group 82 as a chip-on film provided with a plurality of film substrates 83 on which LED chips 88 are mounted in advance in the Y-axis direction along the cut line 82a. Cut and acquired. That is, when manufacturing the backlight device 8, a necessary number of film substrates 83 are cut out from the supplied film group 82 in accordance with the size of the display area of the liquid crystal panel 5 and arranged on the film support portion 81.

The LED rows 83a and 83b are, for example, a part of a film substrate 83 in which a plurality of LED chips 88 are arranged at equal intervals along the longitudinal direction (X-axis direction) as shown in FIG. Cutting portions 84 a and 84 b for connecting the portion 89 and the LED chip 88 and separating the LED chip 88 into one or a plurality of units are provided so as to surround each LED chip 88.
Here, the LED row 83a and the LED row 83b are such that the longitudinal position (X-axis direction position) of the LED chip 88 disposed in each row is the longitudinal direction of the LED chip 88 disposed in the other row. In order to be different from the position, they are arranged in the width direction in a state shifted by a predetermined distance Δx in the X-axis direction. That is, in the LED chip 88 arranged in the LED row 83a and the LED chip 88 arranged in the LED row 83b, the position where the light is emitted is shifted by Δx in the X-axis direction in the state where the LED chip 88 is arranged in the film support portion 81. Therefore, the area for illuminating the liquid crystal panel 5 can be made wider than in the case where the X-axis direction is matched (that is, when Δx = 0).

The cutting portions 84a and 84b have, for example, wiring portions 85a and 85b (shaded portions in FIG. 3A) disposed in the LED rows 83a and 83b and provided around the LED chips 88, respectively. The LED chip 88 is provided repeatedly. Here, as shown in FIG. 3B, the wiring sections 85a and 85b connect the LED chips 88 in the LED rows 83a and 83b in series, and connect the LED chips 88 and the drive circuit section 89 to each other. Thus, the wiring pattern for emitting light to each LED chip 88 is soldered. In other words, the cutting portions 84a and 84b are provided at the end of the repeated positions of the respective cutting portions 84a and 84b because the LED chips 88 and the wiring portions 85a and 85b are electrically connected via the solder. By cutting along the cutting lines 86a and 86b, the LED chips 88 can be separated into an arbitrary number, and the functions of the wiring portions 85a and 85b after the separation can be maintained. That is, the LED chips 88 arranged in the LED rows 83a and 83b after separation are connected in series and connected to the drive circuit unit 89, whereby light can be emitted to the LED chips 88.
In the cut portions 84a and 84b, the portions not corresponding to the wiring portions 85a and 85b (that is, the portions other than the hatched portions in FIG. 3A) are not provided with the wiring pattern, and the LED is not connected via the portions. A path for releasing heat generated from the chip 88 to the outside is formed.

For example, as shown in FIG. 5, the drive circuit unit 89 includes a voltage conversion circuit 89a that applies a voltage to each of the LED rows 83a and 83b (one or a plurality of LED chips 88 connected in series), and the LED row. And a direct current source 89b for supplying a constant current (direct current) to 83a and 83b. In the drive circuit unit 89, the anode side and the cathode side of the LED chip 88 located at the cut end of the LED rows 83a and 83b cut along the cut lines 86a and 86b as shown in FIG. The anode side end portion 89d and the cathode side end portion 89e are connected. In the connected drive circuit unit 89, when the voltage Vout output by converting the input current Iin by the voltage conversion circuit 89a is applied to the disconnected LED rows 83a and 83b, each LED It is assumed that a potential difference Vf occurs in the chip 88 and a current If (LED current) flows.
At this time, since the luminance and chromaticity of the LED chip 88 depend on the current value of the current If, considering the temperature dependence of the potential difference Vf (that is, the LED characteristic that the potential difference increases as the temperature decreases), The voltage value of the voltage Vout is adjusted / controlled by the voltage conversion circuit 89a and the control unit 12 so as to satisfy Vout ≧ Vf × N (N: the number of LED chips 88 included in the disconnected LED row 83a and LED row 83b). Thus, the current If (the brightness and chromaticity of each LED chip 88) is kept constant.

  The control unit 12 includes, for example, a CPU 121 (Central Processing Unit), a RAM (Random Access Memory) 122 used as a work area of the CPU 121, a storage unit 125 that stores various programs executed by the CPU 121, and the like.

  For example, the CPU 121 executes various programs stored in the storage unit 125 in accordance with input signals input from each unit of the liquid crystal display device 100 and outputs an output signal to each unit based on the execution program. Thus, the overall operation of the liquid crystal display device 100 is comprehensively controlled. As a control content performed by the CPU 121, for example, a backlight device is made by outputting a current signal related to the input current Iin to the drive circuit unit 89 and adjusting the current If flowing through each LED chip 88 to a constant value. 8 brightness and chromaticity adjustment control.

  The RAM 122 includes, for example, a program storage area for expanding a processing program executed by the CPU 121, a data storage area for storing a processing result generated when the input data and the processing program are executed, and the like.

  The storage unit 125 is composed of, for example, a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM), and includes various programs necessary for execution of control processing of the CPU 121 in the program storage area.

Next, an operation of illuminating the liquid crystal panel 5 of the backlight device 8 by the liquid crystal display device 100 will be described.
First, when a current signal related to the input current Iin is input from the CPU 121 to the drive circuit unit 89, the voltage conversion circuit 89a converts the current signal into the voltage Vout, and the film array 83 (the LED array cut by the cutting lines 86a and 86b). A constant current If (LED current) flows through each LED chip 88 in 83a and 83b). Each LED chip 88 through which the current If flows emits light in a direction inclined by an angle α from the direction orthogonal to the back surface of the liquid crystal panel 5 while being supported by the bending support portion 81 c of the film support portion 81. The back surface of the liquid crystal panel 5 is evenly illuminated. Then, the heat generated from each LED chip 88 at the time of illumination propagates through the portions not corresponding to the wiring portions 85a and 85b in the cutting portions 84a and 84b and is released to the outside.

  According to the liquid crystal display device 100 in the present embodiment described above, in the backlight device 8 that illuminates the back side of the liquid crystal panel 5 with light emitted from the LED chip 88, a plurality of LED chips 88 are arranged along the longitudinal direction. A flexible film substrate 83 having a plurality of LED rows 83a and 83b in the width direction, a plane area substantially equal to the display area of the liquid crystal panel 5 at a position facing the back surface of the liquid crystal panel 5, and the film substrate 83 A film support portion 81 that can be arranged at predetermined intervals along the width direction, and the film support portion 81 is a direction in which the light from the LED chip 88 of the film substrate 83 is orthogonal to the back surface of the liquid crystal panel 5 Film substrate 83 in a state where the LED rows 83a and 83b of each film substrate 83 are bent so that the light is emitted in a direction inclined at an angle α from Having a fold support portion 81c for supporting.

That is, according to the present invention, a plurality of LED rows 83 a and 83 b in which a plurality of LED chips 88 are arranged on the film substrate 83 are provided in the width direction, and the film substrates 83 are arranged on the film support portion 81 at predetermined intervals. Therefore, since a plurality of LED rows 83a and 83b can be arranged at a time in accordance with the display area of the liquid crystal panel 5, mounting effort is reduced. Further, each film substrate 83 is supported in a state where the LED rows 83a and 83b are bent by the bending support portion 81c, and the light from each LED chip 88 arranged on the film substrate 83 is transmitted to the liquid crystal panel 5. The light is emitted in a direction inclined by an angle α from the direction orthogonal to the back surface. That is, as compared with the case where the light is emitted in a direction orthogonal to the back surface of the liquid crystal panel 5, the light emitted in the inclined direction is more widely dispersed in the back surface when reaching the back surface of the liquid crystal panel 5. be able to.
Therefore, it can be said that the present invention is a backlight device and a liquid crystal display device that are easier to mount and can efficiently illuminate the liquid crystal panel.
Further, since the film substrate 83 is thin and has excellent heat dissipation properties, the backlight device 8 is suitable for the heat generated from the LED chip 88 to the outside as compared with the conventional backlight device using a flat substrate. Heat can be dissipated.

Further, in the film substrate 83, the LED chips 88 in the LED rows 83a and 83b are arranged at equal intervals, and the longitudinal position of the LED chip 88 arranged in each row of the LED rows 83a and 83b is the other side. The LED rows 83a and 83b are arranged on the film substrate 83 so as to be shifted by Δx in the X-axis direction of the LED chips 88 arranged in the row.
That is, in the LED chip 88 arranged in the LED row 83a and the LED chip 88 arranged in the LED row 83b, the position where the light is emitted is shifted by Δx in the X-axis direction in the state where the LED chip 88 is arranged in the film support portion 81. Therefore, the light from the LED chip 88 is more widely dispersed within the back surface of the liquid crystal panel 5 than in the case of matching with the X-axis direction (that is, when Δx = 0), and the liquid crystal panel is more efficiently distributed. 5 can be illuminated.

Further, the backlight device 8 includes a drive circuit unit 89 that independently drives the LED chips 88 for each arbitrary number, and the film substrate 83 surrounds the LED chips 88 in the LED rows 83a and 83b. The driving circuit unit 89 and the LED chip 88 are connected to each other with wiring portions 85a and 85b, and cutting portions 84a and 84b for separating the LED chips 88 in an arbitrary number are provided and cut by the cutting portions 84a and 84b. Then, the wiring portions 85a and 85b are divided while maintaining the function.
That is, by cutting with the cutting portions 84a and 84b, the LED chips 88 can be separated in an arbitrary number, and the LED chips 88 arranged in the separated LED rows 83a and 83b are connected in series. Thus, light can be emitted to each LED chip 88 by connecting to the drive circuit unit 89.

The scope of the present invention is not limited to the above embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention.
For example, in the above embodiment, as shown in FIG. 2, the longitudinal positions of the LED chips 88 arranged at equal intervals in each of the LED rows 83 a and 83 b are arranged in the other row. The LED rows 83a and 83b are arranged on the film substrate 83 so as to be shifted by Δx in the X-axis direction of the LED chip 88. However, as shown in FIG. It may be. In this case, dispersion of light emitted from the LED chip 88 cannot be expected as compared with the case where the LED chips 88 are arranged so as to be shifted by Δx. Therefore, for example, the apex angle of the bent support portion 81c is made more acute, and the light emitted from each LED chip 88 is inclined by an angle β larger than the angle α from the direction orthogonal to the back surface of the liquid crystal panel 5. The light may be emitted to Or you may change the space | interval (equal space | interval) between the LED chips 88 in each LED row | line | column 83a, 83b in FIG.
Moreover, although the case where the LED row arrange | positioned on the film board | substrate 83 is two rows (LED83a, 83b) is illustrated in the said embodiment, of course, you may arrange | position three or more rows.

DESCRIPTION OF SYMBOLS 100 Liquid crystal display device 5 Liquid crystal panel 8 Backlight apparatus 81 Film support part (film arrangement | positioning part)
81c Bending support part 83 Film board 83a, 83b LED row (light source row)
84a, 84b Cutting part 85a, 85b Wiring part 88 LED chip (backlight light source)
89 Drive circuit

Claims (4)

In a backlight device that illuminates the back side of the liquid crystal panel with light emitted from a backlight light source,
A flexible film substrate provided with a plurality of light source arrays in the width direction, in which a plurality of the backlight light sources are arranged along the longitudinal direction;
A first wiring part disposed on the film substrate and connecting each backlight light source in series; and a second wiring part for routing one end of the first wiring part to the other end; and the backlight light source unit And a backlight unit configured by repeating the same wiring pattern,
A drive circuit unit for driving the backlight light source;
With
The backlight device according to claim 1, wherein the film substrate is disposed in a state where the light source rows are bent . The backlight device according to claim 1,
The film substrate is
A cutting part for separating the backlight light source in an arbitrary number is provided,
When cut at the cutting portion, the first wiring portion and the second wiring portion are configured to be divided in a state of maintaining a function,
In the separated state, the first wiring part and the second wiring part are connected, and on the same side of the film substrate, an anode terminal connected to the anode terminal of the first wiring, and the second wiring A cathode terminal connected to the cathode terminal of
The backlight device, wherein the first wiring portion and the second wiring portion are adjacently arranged in parallel . The backlight device according to claim 1 or 2,
The film substrate is
Each light source row is arranged on the film substrate so that the longitudinal position of one backlight light source is different from the longitudinal position of the other backlight light source among adjacent backlight light source rows,
A backlight device , wherein sprocket holes as through holes are provided at predetermined intervals along the longitudinal direction at both ends of the film substrate in the short direction . A display panel;
A flexible film substrate provided with a plurality of light source arrays in the width direction in which a plurality of backlight light sources are arranged along the longitudinal direction;
A first wiring part disposed on the film substrate and connecting each backlight light source in series; and a second wiring part for routing one end of the first wiring part to the other end; and the backlight light source unit And a backlight unit configured by repeating the same wiring pattern,
A drive circuit unit for driving the backlight light source;
With
The display device according to claim 1, wherein the film substrate is disposed in a state where the light source rows are bent.

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