JP2017167548A - Display device - Google Patents

Abstract

Provided are a display device and a backlight capable of reducing the production cost as compared with conventional ones. A display device includes an LED substrate unit that emits light toward a back surface of a liquid crystal panel and an LED drive circuit. The first LED substrate 130A or the second LED substrate 130B included in the LED substrate unit 130 includes a plurality of LEDs 112 electrically connected in series along the longitudinal direction of the substrate to the main surface of the substrate, and one end portion in the longitudinal direction of the substrate (I) a first connector 114 including a first terminal 114A and (ii) a second terminal 114B connected to one end of the plurality of LEDs 112; and a second connector 114 disposed at the other end in the longitudinal direction of the substrate. (I) includes a second connector 115 including a third terminal 115A connected to the first terminal 114A of the first connector 114, and (ii) a fourth terminal 115B connected to the other ends of the plurality of LEDs 112. The first connector 114 is connected to the LED drive circuit 103. [Selection] Figure 9

Description

  The present invention relates to a display device having a backlight.

  Various display devices typified by liquid crystal display devices are provided with direct-type backlights that irradiate light toward the back surface of the display panel (see, for example, Patent Document 1).

  FIG. 17 is a schematic diagram showing a schematic configuration of a conventional backlight.

  The backlight 150A is provided between the display panel of the display device and the rear frame 102 provided on the back side of the display panel.

  The backlight 150A includes a plurality (three in FIG. 17) of LED board units 150. Each LED board unit 150 is connected to the LED drive circuit 103 and is driven by electric power supplied from the LED drive circuit 103.

  FIG. 18 is a schematic diagram illustrating a schematic configuration of the LED substrate unit 150. FIG. 19 is a circuit diagram of the LED board unit 150.

  The LED board unit 150 includes a first LED board 150L arranged on the left side of the rear frame 102 and a second LED board 150R arranged on the right side of the rear frame 102. The LED board unit 150 includes a plurality of LEDs 112 connected in series, a first connector 151, and a second connector 152. The second LED substrate 150R includes a plurality of LEDs 112 and a third connector 153 connected in series.

  The first connector 151 includes a first terminal 151A and a second terminal 151B. The second connector 152 includes a third terminal 152A and a fourth terminal 152B. The third connector 153 includes a fifth terminal 153A and a sixth terminal 153B.

  The first terminal 151A is connected to the anode of the LED 112 at the start position of the series connection among the plurality of LEDs 112 arranged on the first LED board 150L, and is connected to the positive electrode of the LED drive circuit 103 via the cable 118. .

  The second terminal 151B is connected to the fourth terminal 152B and also connected to the negative electrode of the LED drive circuit 103 via the cable 120.

  The third terminal 152A is connected to the cathode of the LED 112 at the end position of the series connection among the plurality of LEDs 112 arranged on the first LED board 150L, and is connected to the fifth terminal 153A via the cable 154.

  The fourth terminal 152B is connected to the second terminal 151B as described above, and is connected to the sixth terminal 153B via the cable 156.

  The fifth terminal 153A is connected to the anode of the LED 112 at the start position of the series connection among the plurality of LEDs 112 arranged on the second LED substrate 150R.

  The sixth terminal 153B is connected to the cathode of the LED 112 at the end of the series connection among the LEDs 112 arranged on the second LED substrate 150R.

  As described above, the LED board unit 150 includes a plurality of LED boards due to restrictions on the size of the LED boards.

JP 2012-9220 A

  However, conventionally, the LED board unit 150 is constituted by two LED boards. Therefore, three connectors and four cables are required for each LED board unit 150. Further, the first LED substrate 150L and the second LED substrate 150R have different circuit configurations. For this reason, due to these factors, there is a problem that the production cost of the backlight 150A, and hence the production cost of the display device, becomes high.

  The present invention has been made in order to solve the above-described problems, and provides a display device and a backlight that can reduce the production cost compared to the conventional case when an LED substrate unit is configured by a plurality of LED substrates. The purpose is to do.

  A display device according to one embodiment of the present invention includes a display panel, a light source that emits light toward a back surface of the display panel, and a power supply circuit that supplies power to the light source, and the light source includes a substrate, A plurality of LEDs electrically connected in series along the longitudinal direction of the substrate to the main surface of the substrate; and (i) a first terminal; (Ii) a first connector including a second terminal connected to one end of the plurality of LEDs; and (i) the first terminal of the first connector disposed at the other end in the longitudinal direction of the substrate. And (ii) a second connector including a fourth terminal connected to the other end of the plurality of LEDs, wherein the first connector of the substrate is connected to the power supply circuit. Is done.

  The second terminal of the first connector of the board may be connected to a negative electrode of the power circuit.

  In addition, the light source unit includes one or more other substrates, and the first terminal of the first connector of the substrate is the other one of the one or more other substrates adjacent to the substrate. It may be connected to a connector.

  One end of the plurality of LEDs may be a cathode of the LED.

  The other end of the plurality of LEDs may be an anode of the LED.

  Further, the first terminal of the first connector of the substrate may be connected to a positive electrode of the power supply circuit.

  In addition, the light source unit includes one or more other substrates, and the second terminal of the first connector of the substrate is the other one of the one or more other substrates adjacent to the substrate. It may be connected to a connector.

  And a cabinet having an opening, wherein the light source is disposed on one side, the power circuit is disposed on a surface opposite to the one side, and the first connector of the board is disposed through the opening. The power supply circuit may be connected.

  The opening may be located near the center when viewed from the main surface of the display panel.

  In order to achieve the above object, a display device according to one embodiment of the present invention includes a display panel, a backlight that emits light toward the back surface of the display panel, and a power supply circuit that supplies power to the backlight. The backlight includes at least one LED board unit, and each LED board unit includes a first LED board and a second LED board arranged in a line, and each of the first LED board and the second LED board. Are arranged in the long side direction of the LED substrate on the surface of the LED substrate and connected in series, and are provided on one short side of the LED substrate, and are connected in series among the plurality of LEDs A first terminal connected to the anode of the LED at the start position of the LED, and a second terminal connected to the cathode of the LED at the end position of the series connection among the plurality of LEDs. A first connector having a child, wherein the second terminal of the first connector of the first LED board is connected to the first terminal of the first connector of the second LED board, and the first LED board The first terminal of the first connector is connected to the positive electrode of the power supply circuit, and the second terminal of the first connector of the second LED substrate is connected to the negative electrode of the power supply circuit.

  According to this, the structure of a 1st LED board and a 2nd LED board can be made the same. Further, the number of connectors included in each LED board unit is two. Furthermore, the cables required for each LED board unit are a cable for connecting the first connectors, a cable for connecting the first connector of the first LED board and the positive electrode of the power supply circuit, and the first connector of the second LED board. And three cables for connecting the negative electrode of the power supply circuit. For this reason, the number of connectors and the number of cables can be reduced as compared with the prior art. Therefore, when an LED substrate unit is configured with a plurality of LED substrates, the production cost can be reduced compared to the conventional case.

  Further, the first connector of the first LED board and the first connector of the second LED board may be arranged at positions facing each other.

  According to this, both the first LED substrate and the second LED substrate are arranged side by side in different directions. For this reason, the length of the cable connecting the first LED substrate and the second LED substrate can be shortened.

  The display device further includes a first terminal and a second terminal at one end, a third terminal and a fourth terminal at the other end, the first terminal and the third terminal are connected, and the first terminal An inter-board connector including a first cable connected to two terminals and a second cable connected to the fourth terminal, wherein the second terminal of the inter-board connector and the positive electrode of the power supply circuit are the first cable The fourth terminal of the inter-board connector and the negative electrode of the power supply circuit are connected by the second cable, and the first terminal of the inter-board connector is connected to the first connector of the first LED board. The second terminal of the inter-board connector is connected to the first terminal of the first LED board, and the third terminal of the inter-board connector is connected to the second terminal. Is connected to the first terminal of the first connector of the LED substrate, the fourth terminal of the inter-substrate connector may be connected to the second terminal of the first connector of the first 2LED substrate.

  According to this, the first terminal and the third terminal in the inter-board connector are connected in advance. Therefore, the first LED board and the second LED board can be connected only by connecting the first connector of the first LED board and the first connector of the second LED board using the inter-board connector. In addition, since the first cable and the second cable are connected to the board-to-board connector in advance, the trouble of connecting the first terminal of the first connector of the first LED board to the first cable and the first connector of the second LED board The trouble of connecting the second terminal to the second cable can be reduced.

  Further, in each terminal set connecting the inter-board connector and the first connector of the first LED board or the first connector of the second LED board, one terminal has a male shape, and the other terminal is It may have a female shape.

  Thus, connectors can be directly connected by making one of the terminal sets male and one female.

  Each of the LED board units further includes a third LED board aligned with the first LED board and the second LED board, and each of the first LED board and the second LED board further includes the LED board. A third terminal connected to the first terminal of the first connector, and a fourth terminal connected to the anode of the LED at the start position of the series connection among the plurality of LEDs, The third LED board has the same configuration as the first LED board and the second LED board, and the third terminal and the fourth terminal of the second connector of the first LED board. Is connected, and the third terminal of the second connector of the second LED board and the fourth terminal of the second connector of the third LED board are connected, and The fourth terminal of the second connector of the second LED board is connected to the third terminal of the second connector of the third LED board, and the first terminal of the first connector of the third LED board and the The second terminal may be connected.

  According to this, the configuration of the first LED substrate, the second LED substrate, and the third LED substrate can be the same, and the three LED substrates can be arranged side by side. For this reason, when an LED substrate unit is constituted by a plurality of LED substrates, the production cost can be kept lower than in the past.

  Each of the first LED board, the second LED board, and the third LED board is a first jumper for connecting or disconnecting the first terminal and the second terminal of the first connector. And a second jumper for connecting or disconnecting between the third terminal and the fourth terminal of the second connector, and the third terminal of the second connector of the first LED substrate And the fourth terminal are connected by the second jumper of the first LED board, the first jumper of the first LED board, the first jumper and the second jumper of the second LED board, and the third LED board. The second jumper disconnects the terminals assigned to the jumper, and connects the first end of the first connector of the third LED board. And the second terminal may be connected by the first jumper of the first 3LED substrate.

  According to this, the cable required when connecting two terminals in the same connector can be eliminated by connecting the terminals with a jumper. For this reason, a display apparatus can be produced at low cost.

  The first connector of the first LED substrate and the second LED substrate may be provided on the back surface of the LED substrate.

  Usually, the first LED substrate and the second LED substrate are provided between the power supply circuit and the display panel. For this reason, it becomes easy to connect a 1st connector and a power supply circuit with a cable by providing a 1st connector in the back surface of an LED circuit. In addition, the length of the cable connecting the first connector and the power supply circuit can be shortened.

  A backlight according to another aspect of the present invention includes at least one LED board unit, and each LED board unit includes a first LED board and a second LED board, and each of the first LED board and the second LED board includes A plurality of LEDs arranged in the long side direction of the LED substrate on the surface of the LED substrate and connected in series, and provided on one short side of the LED substrate, and connected in series among the plurality of LEDs. A first connector having a first terminal connected to the anode of the LED at the start position and a second connector connected to the cathode of the LED at the end position of the series connection among the plurality of LEDs; The second terminal of the first connector of the board and the first terminal of the first connector of the second LED board are connected to each other in front of the first LED board. The first terminal of the first connector is connected to the positive pole of the power supply circuit, said second terminal of said first connector of said first 2LED substrate is connected to the negative pole of the power supply circuit.

  According to this, the structure of a 1st LED board and a 2nd LED board can be made the same. Further, the number of connectors included in each LED board unit is two. Furthermore, the cables required for each LED board unit are a cable for connecting the first connectors, a cable for connecting the first connector of the first LED board and the positive electrode of the power supply circuit, and the first connector of the second LED board. And three cables for connecting the negative electrode of the power supply circuit. For this reason, the number of connectors and the number of cables can be reduced as compared with the prior art. Therefore, when an LED substrate unit is configured with a plurality of LED substrates, the production cost can be reduced compared to the conventional case.

  ADVANTAGE OF THE INVENTION According to this invention, when an LED board unit is comprised with a some LED board, the display apparatus and backlight which can hold down production cost low compared with the former can be provided.

It is a perspective view which shows the front side of the display apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the back side of the display apparatus of FIG. It is a top view which shows the inside of a display apparatus. It is the figure which showed the structure of the backlight typically. It is the schematic diagram which expanded the LED board unit. It is a circuit diagram of a LED board unit. It is a top view which shows the inside of a display apparatus for demonstrating the arrangement position of a LED drive circuit. It is a rear view of the display apparatus of the state which took the back cover for demonstrating the arrangement position of a LED drive circuit. It is a circuit diagram which shows an example of the LED board unit comprised from three LED boards. It is a circuit diagram which shows an example of the LED board unit comprised from four LED boards. It is a circuit diagram which shows an example of the LED board unit comprised from three LED boards. It is a circuit diagram which shows an example of the LED board unit comprised from four LED boards. It is the perspective view which expanded the center part of the LED board unit which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of the board | substrate connector. It is the perspective view which expanded the center part of the LED board unit after connecting two 1st connectors to the board | substrate connector, respectively. It is the perspective view of the back surface side which expanded the center part of the LED board unit. It is a schematic diagram which shows schematic structure of the conventional backlight. It is a schematic diagram which shows schematic structure of an LED board unit. It is a circuit diagram of a LED board unit.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. The invention is specified by the claims. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims are not necessarily required to achieve the object of the present invention, but are described as constituting more preferable embodiments. Is done.

(Embodiment 1)
[Configuration of display device]
FIG. 1 is a perspective view showing a front side of a display device according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the back side of the display device of FIG.

  The display device 100 includes a housing 104 and a liquid crystal panel 106 that is an example of a display panel provided in the housing 104. The housing 104 is configured by combining a front cabinet 107 and a rear cabinet 108 with each other. A rear cover 109 is attached to the outer surface of the rear cabinet 108. Note that an LED drive circuit described later is attached between the rear cabinet 108 and the rear cover 109.

[Configuration of LED board unit]
FIG. 3 is a plan view showing the inside of the display device 100. The rear frame 102 is disposed on the front side of the rear cabinet 108 (the front side of the display device 100). The rear frame 102 is provided with a backlight 110A. The backlight 110 </ b> A includes a plurality of LED substrate units 110 that each emit light toward the back surface of the liquid crystal panel 106.

  Each LED board unit 110 includes a first LED board 110 </ b> L and a second LED board 110 </ b> R, each irradiating light toward the back surface of the liquid crystal panel 106. The first LED substrate 110L and the second LED substrate 110R are arranged in a line in the left-right direction of the liquid crystal panel 106.

  FIG. 4 is a diagram schematically showing the configuration of the backlight 110A. FIG. 5 is an enlarged schematic diagram of the LED substrate unit 110.

  When the first connector 114 provided on the first LED board 110L and the first connector 114 provided on the second LED board 110R are connected by the cable 116, the two LED boards are connected. The cable 118 connected to the first connector 114 of the first LED board 110L is connected to the positive electrode of the LED drive circuit 103, and the cable 118 connected to the first connector 114 of the second LED board 110R is connected to the LED drive circuit 103. Connected to the negative electrode. Thereby, the first LED substrate 110L and the second LED substrate 110R are driven by the electric power supplied from the LED drive circuit 103 which is an example of the power supply circuit.

  FIG. 6 is a circuit diagram of the LED board unit 110.

  The first LED board 110L includes a plurality of LEDs 112 and a first connector 114. The plurality of LEDs 112 are arranged on the surface of the first LED substrate 110L in the long side direction of the first LED substrate 110L and connected in series. The first connector 114 is provided on one short side of the first LED board 110L, and includes a first terminal 114A and a second terminal 114B. 114 A of 1st terminals are connected to the anode of LED112 of the start position of serial connection among several LED112. The second terminal 114B is connected to the cathode of the LED 112 at the end of the series connection among the plurality of LEDs 112.

  The second LED board 110R has the same configuration as the first LED board 110L, although the arrangement direction is different. That is, the second LED substrate 110R has the same configuration as that obtained by rotating the first LED substrate 110L by 180 degrees in the plane of the rear frame 102. Thereby, the first connector 114 of the first LED board 110L and the first connector 114 of the second LED board 110R are arranged at positions facing each other.

  The second terminal 114B of the first connector 114 of the first LED board 110L and the first terminal 114A of the first connector 114 of the second LED board 110R are connected by a cable 116.

  The first terminal 114A of the first connector 114 of the first LED board 110L is connected to the positive electrode of the LED drive circuit 103 by the cable 118.

  The second terminal 114B of the first connector 114 of the second LED board 110R is connected to the negative electrode of the LED drive circuit 103 by the cable 120.

  As described above, the cable 118 and the cable 120 are drawn out from the vicinity of the central portion of the LED board unit 110.

  FIG. 7 is a plan view showing the inside of the display device 100 for explaining the arrangement position of the LED drive circuit 103. FIG. 8 is a rear view of the display device 100 in a state in which the rear cover 109 is removed for explaining the arrangement position of the LED drive circuit 103.

  The LED drive circuit 103 is disposed at the approximate center of the display device 100 and between the rear cabinet 108 and the rear cover 109. As shown in FIG. 7, the rear frame 102 is provided with an opening 119 at a position facing the positive electrode and the negative electrode of the LED drive circuit 103. The cables 118 and 120 connect the LED board unit 110 and the LED drive circuit 103 through the opening 119.

  As described above, according to the first embodiment, the first LED substrate 110L and the second LED substrate 110R can have the same configuration. Each LED board unit includes two connectors and three cables. For this reason, the number of connectors and the number of cables can be reduced as compared with the prior art. Therefore, when an LED substrate unit is configured with a plurality of LED substrates, the production cost can be reduced compared to the conventional case.

  In addition, the first LED substrate 110L and the second LED substrate 110R are arranged in different directions so as to be arranged side by side. For this reason, the length of the cable connecting the first LED substrate 110L and the second LED substrate 110R can be shortened.

  In addition, the cables 118 and 120 are pulled out from the vicinity of the center of the LED board unit 110. The LED drive circuit 103 is disposed near the center of the display device 100. For this reason, the length of the cables 118 and 120 for connecting the LED board unit 110 and the LED drive circuit 103 can be shortened.

(Modification 1 of Embodiment 1)
In the first embodiment, the LED board unit 110 is composed of two LED boards, the first LED board 110L and the second LED board 110R. In this modification, an LED board unit composed of three or more LED boards will be described.

  FIG. 9 is a circuit diagram showing an example of an LED board unit composed of three LED boards.

  The LED board unit 130 includes a first LED board 130A, a second LED board 130B, and a third LED board 130C, each of which irradiates light toward the back surface of the liquid crystal panel 106. These three LED substrates are arranged in a line in the left-right direction of the liquid crystal panel 106.

  The first LED board 130 </ b> A includes a plurality of LEDs 112, a first connector 114, and a second connector 115.

  The plurality of LEDs 112 are arranged on the surface of the first LED substrate 130A in the long side direction of the first LED substrate 130A and connected in series.

  The first connector 114 is provided on one short side of the first LED board 130A, and includes a first terminal 114A and a second terminal 114B.

  114 A of 1st terminals are connected to the anode of LED112 of the start position of serial connection among several LED112. The second terminal 114B is connected to the cathode of the LED 112 at the end of the series connection among the plurality of LEDs 112.

  The second connector 115 is provided on the other short side of the first LED substrate 130A, and includes a third terminal 115A and a fourth terminal 115B. The third terminal 115A is connected to the first terminal 114A of the first connector 114. The fourth terminal 115B is connected to the anode of the LED 112 at the start position of series connection among the plurality of LEDs 112.

  The second LED board 130B and the third LED board 130C have the same configuration as the first LED board 130A. However, the arrangement direction of the second LED board 130B is different from that of the first LED board 130A and the third LED board 130C.

  The third terminal 115A and the fourth terminal 115B of the second connector 115 of the first LED board 130A are connected by a cable 141.

  The second terminal 114B of the first connector 114 of the first LED board 130A and the first terminal 114A of the first connector 114 of the second LED board 130B are connected by a cable 116.

  The first terminal 114 </ b> A of the first connector 114 of the first LED board 130 </ b> A is connected to the positive electrode of the LED drive circuit 103 by the cable 118.

  The second terminal 114B of the first connector 114 of the second LED substrate 130B is connected to the negative electrode of the LED drive circuit 103 by the cable 120.

  The third terminal 115A of the second connector 115 of the second LED board 130B and the fourth terminal 115B of the second connector 115 of the third LED board 130C are connected by a cable 142.

  The fourth terminal 115B of the second connector 115 of the second LED board 130B and the third terminal 115A of the second connector 115 of the third LED board 130C are connected by a cable 143.

  The first terminal 114A and the second terminal 114B of the first connector 114 of the third LED board 130C are connected by a cable 144.

  As described above, according to the first modification of the first embodiment, the configuration of the first LED substrate 130A, the second LED substrate 130B, and the third LED substrate 130C is the same, and the three LED substrates are arranged side by side. be able to. For this reason, when an LED substrate unit is constituted by a plurality of LED substrates, the production cost can be kept lower than in the past.

  Note that the number of LED substrates is not limited to three, and may be four or more.

  For example, as shown in FIG. 10, an LED board unit 131 is composed of four LED boards, a first LED board 130A, a second LED board 130B, a third LED board 130C, and a fourth LED board 130D arranged in a line. Also good. The fourth LED board 130D has the same circuit configuration as the first LED board 130A, the second LED board 130B, and the third LED board 130C. The fourth LED board 130D is disposed in the same direction as the second LED board 130B.

  The method of connecting the first LED substrate 130A and the second LED substrate 130B and the method of connecting the second LED substrate 130B and the third LED substrate 130C are the same as those of the LED substrate unit 130 shown in FIG. Hereinafter, how to connect the third LED substrate 130C and the fourth LED substrate 130D will be described.

  The second terminal 114B of the first connector 114 of the third LED board 130C and the first terminal 114A of the first connector 114 of the fourth LED board 130D are connected by a cable 145.

  A first terminal 114A of the first connector 114 of the third LED board 130C and a second terminal 114B of the first connector 114 of the fourth LED board 130D are connected by a cable 146.

  The third terminal 115A and the fourth terminal 115B of the second connector 115 of the fourth LED board 130D are connected by a cable 147.

(Modification 2 of Embodiment 1)
In this modification, another configuration example of the LED board unit including three or more LED boards will be described.

  FIG. 11 is a circuit diagram showing an example of an LED board unit composed of three LED boards.

  The LED board unit 132 includes a first LED board 132A, a second LED board 132B, and a third LED board 132C, each of which irradiates light toward the back surface of the liquid crystal panel 106. These three LED substrates are arranged in a line in the left-right direction of the liquid crystal panel 106.

  The first LED board 132A has a configuration in which a first jumper 124 and a second jumper 125 are further added to the first LED board 130A shown in FIG. The first jumper 124 and the second jumper 125 are, for example, a jumper switch, a jumper resistor, or a jumper line, and the jumper has a function of a switch for switching connection or non-connection between two points.

  The first jumper 124 is provided to connect or disconnect the first terminal 114A and the second terminal 114B of the first connector 114. That is, the first jumper 124 connects the cathode of the LED 112 at the end of the series connection among the plurality of LEDs 112 and the connection line 148 of the first terminal 114A and the third terminal 115A.

  The second jumper 125 is provided to connect or disconnect the third terminal 115A and the fourth terminal 115B of the second connector 115. That is, the second jumper 125 connects the anode of the LED 112 at the start position of serial connection among the plurality of LEDs 112 and the connection line 148 of the first terminal 114A and the third terminal 115A.

  The second LED substrate 132B and the third LED substrate 132C have the same configuration as the first LED substrate 132A. However, the arrangement direction of the second LED board 132B is different from that of the first LED board 132A and the third LED board 132C.

  The method of connecting the first LED substrate 132A and the second LED substrate 132B and the method of connecting the second LED substrate 132B and the third LED substrate 132C are the same as those of the LED substrate unit 130 shown in FIG.

  Unlike the LED board unit 130, the LED board unit 132 does not require the cables 141 and 144. Instead, the second jumper 125 of the first LED board 132A and the first jumper 124 of the third LED board 132C each connect the terminals.

  Other jumpers (the first jumper 124 of the first LED board 132A, the first jumper 124 and the second jumper 125 of the second LED board 132B, and the second jumper 125 of the third LED board 132C) are connected between the terminals assigned to the jumper. Is disconnected.

  As described above, according to the second modification of the first embodiment, the configuration of the first LED board 132A, the second LED board 132B, and the third LED board 132C is the same, and the three LED boards are arranged side by side. be able to. For this reason, when an LED substrate unit is constituted by a plurality of LED substrates, the production cost can be kept lower than in the past.

  In addition, by connecting the terminals with a jumper, it is possible to eliminate a cable that is necessary when connecting two terminals in the same connector. For this reason, a display apparatus can be produced at low cost.

  Note that the number of LED substrates is not limited to three, and may be four or more.

  For example, as shown in FIG. 12, an LED board unit 133 is composed of four LED boards, a first LED board 132A, a second LED board 132B, a third LED board 132C, and a fourth LED board 132D arranged in a line. Also good. The fourth LED board 132D has the same circuit configuration as the first LED board 132A, the second LED board 132B, and the third LED board 132C. The fourth LED board 132D is arranged in the same direction as the second LED board 132B.

  The method of connecting the first LED substrate 132A and the second LED substrate 132B and the method of connecting the second LED substrate 132B and the third LED substrate 132C are the same as those of the LED substrate unit 132 shown in FIG. Hereinafter, how to connect the third LED substrate 132C and the fourth LED substrate 132D will be described.

  The second terminal 114B of the first connector 114 of the third LED board 132C and the first terminal 114A of the first connector 114 of the fourth LED board 132D are connected by a cable 145.

  The first terminal 114A of the first connector 114 of the third LED board 132C and the second terminal 114B of the first connector 114 of the fourth LED board 132D are connected by a cable 146.

  The first jumper 124 of the third LED substrate 132C brings the first terminal 114A and the second terminal 114B of the first connector 114 into a non-connected state.

  In addition, the first jumper 124 of the fourth LED board 132D disconnects the first terminal 114A and the second terminal 114B of the first connector 114, and the second jumper 125 is the third terminal of the second connector 115. A connection state is established between 115A and the fourth terminal 115B.

(Embodiment 2)
In Embodiment 1, two LED boards are connected with a cable. The present embodiment is different from the first embodiment in that two LED boards are connected by a connector.

  In the following description, the points different from the first embodiment will be mainly described.

  The LED board unit according to the second embodiment includes the first LED board 110L and the second LED board 110R as in the first embodiment.

  FIG. 13 is an enlarged perspective view of the central portion of the LED substrate unit 110 according to Embodiment 2 of the present invention.

  Each of the first terminal 114A and the second terminal 114B of the first connector 114 has a male shape. The two first connectors 114 are respectively connected to the inter-board connector 140 having female-shaped terminals. Further, the two first connectors 114 are arranged on the surface of each first LED substrate.

  FIG. 14 is a diagram illustrating a configuration of the inter-board connector 140. The inter-board connector 140 includes a first terminal 140A, a second terminal 140B, a third terminal 140C, and a fourth terminal 140D, each of which is a female terminal. The board-to-board connector 140 includes a first opening 140E and a second opening 140F.

  The first terminal 140 </ b> A and the third terminal 140 </ b> C are connected inside the inter-board connector 140.

  The cable 118 is drawn from the second terminal 140B through the first opening 140E. Further, the cable 120 is drawn from the fourth terminal 140D through the second opening 140F.

  FIG. 15 is an enlarged perspective view of the central portion of the LED board unit 110 after the two first connectors 114 are connected to the inter-board connectors 140, respectively. As shown in FIG. 15, by using the board-to-board connector 140, the two first connectors 114 can be connected without using a cable.

  As described above, according to the second embodiment, the first terminal 140A and the third terminal 140C in the inter-board connector 140 are connected in advance. Therefore, the first LED board 110L and the second LED board 110R can be connected only by connecting the first connector 114 of the first LED board 110L and the first connector 114 of the second LED board 110R using the inter-board connector 140. Can do. In addition, since the cable 118 and the cable 120 are connected to the board-to-board connector 140 in advance, the trouble of connecting the first terminal 114A of the first connector 114 of the first LED board 110L to the cable 118 and the second of the second LED board 110R. The trouble of connecting the second terminal 114B of one connector 114 to the cable 120 can be reduced.

  Moreover, connectors can be directly connected by making one of each terminal set to be connected into a male shape and one as a female shape.

  In the second embodiment, the first connector 114 is disposed on the front surface of the LED substrate. However, the first connector 114 may be disposed on the rear surface of the LED substrate.

  FIG. 16 is a perspective view of the rear surface side in which the central portion of the LED substrate unit 110 is enlarged. As shown in FIG. 16, the two first connectors 114 and the board-to-board connector 140 are connected on the back surface side.

  Usually, the first LED substrate 110L and the second LED substrate 110R are provided between the LED drive circuit 103 and the liquid crystal panel 106. For this reason, it becomes easy to connect the 1st connector 114 and the LED drive circuit 103 with a cable by providing the 1st connector 114 in the back surface of an LED circuit. Further, the length of the cable connecting the first connector 114 and the LED drive circuit 103 can be shortened.

  The display device and the backlight according to the embodiment of the present invention have been described above, but the present invention is not limited to this embodiment.

  For example, in Embodiments 1 and 2, the direct type backlight has been described, but the backlights shown in Embodiments 1 and 2 may be applied to an edge type backlight.

  Further, the above embodiment and the above modification examples may be combined.

  The present invention can be applied to, for example, a liquid crystal television or a liquid crystal display device as a playback device including an LED backlight.

DESCRIPTION OF SYMBOLS 100 Display apparatus 102 Rear frame 103 LED drive circuit 104 Case 106 Liquid crystal panel 107 Front cabinet 108 Rear cabinet 109 Rear cover 110, 130, 131, 132, 133, 150 LED board unit 110A, 150A Backlight 110L, 130A, 132A, 150L First LED boards 110R, 130B, 132B, 150R Second LED boards 114, 151 First connectors 114A, 140A, 151A First terminals 114B, 140B, 151B Second terminals 115, 152 Second connectors 115A, 140C, 152A Third terminals 115B , 140D, 152B Fourth terminal 116, 118, 120, 141, 142, 143, 144, 145, 146, 147, 154, 156 Cable 119 Opening 1 4 first jumper 125 second jumper 130C, 132C first 3LED substrate 130D, 132D second 4LED substrate 140 substrate between connectors 140E first opening 140F second opening 148 connecting line 153 third connector 153A fifth terminal 153B sixth terminal

Claims (9)

A display panel;
A light source that emits light toward the back of the display panel;
A power supply circuit for supplying power to the light source,
The light source includes a substrate;
The substrate is
A plurality of LEDs electrically connected in series along the longitudinal direction of the substrate to the main surface of the substrate;
A first connector disposed at one end of the substrate in the longitudinal direction and including (i) a first terminal and (ii) a second terminal connected to one end of the plurality of LEDs;
A second terminal disposed at the other end of the substrate in the longitudinal direction; (i) a third terminal connected to the first terminal of the first connector; and (ii) a fourth terminal connected to the other ends of the plurality of LEDs. A second connector including a terminal,
The first connector of the substrate is connected to the power supply circuit. The display device according to claim 1, wherein the second terminal of the first connector of the substrate is connected to a negative electrode of the power supply circuit. The light source unit includes one or more other substrates,
The display device according to claim 2, wherein the first terminal of the first connector of the board is connected to a connector of another board adjacent to the board among the one or more other boards. The display device according to claim 1, wherein one end of each of the plurality of LEDs is a cathode of the LED. The display device according to claim 1, wherein the other ends of the plurality of LEDs are LED anodes. The display device according to claim 1, wherein the first terminal of the first connector of the substrate is connected to a positive electrode of the power supply circuit. The light source unit includes one or more other substrates,
The display device according to claim 6, wherein the second terminal of the first connector of the substrate is connected to a connector of another substrate adjacent to the substrate among the one or more other substrates. A cabinet having an opening, wherein the light source is disposed on one side;
The power supply circuit is disposed on a surface opposite to the one surface side,
The display device according to claim 1, wherein the first connector of the substrate is connected to the power supply circuit through the opening. The display device according to claim 8, wherein the opening is located near a center when viewed from a main surface of the display panel.

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