LIGHT EMITTING MODULE, LIGHT EMITTING MODULE UNIT, AND BACKLIGHT SYSTEM

• US 20110310590A1
• Filed: 02/25/2010
• Published: 12/22/2011
• Est. Priority Date: 03/05/2009
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yamashita, Atsushi, Nabesawa, Hiroyuki, Sumitani, Ken, Onozaki, Manabu, Yumoto, Manabu
• Granted Patent: US 8,714,764 B2
• Time in Patent Office: Days
• US Class Current: 362/97.1
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133609 including means for improving the color mixing, e.g. white
• CPC Class Codes: G02F 1/133612 Electrical details

Abstract

A light emitting module board which is compatible with a plurality of screen sizes and is used for a backlight apparatus of a liquid crystal display panel is provided. A light emitting module includes a first connector 15 and a second connector 16, each including a plurality of cathode terminals and at least one anode terminal, at each end of the board, and can be connected to another one to each other through the connectors in multi-level. A cathode wiring 14 for supplying a cathode control signal includes first cathode wirings which connect the cathode terminals of the first connector and light emitting bodies to supply a control signal to the light emitting bodies in the light emitting module, and second cathode wirings which connect the cathode terminals of the first and second connectors to supply a control signal to the light emitting bodies on a downstream light emitting module.

Claims

1. A light emitting module in which, on a board, an anode control signal wiring group, a cathode control signal wiring group, and a plurality of light emitting bodies arranged in a longitudinal direction of the board are formed, both ends of the board independently have a first connector and a second connector each configured by a plurality of cathode terminals and at least one anode terminal, and the second connector of an upstream stage and the first connector of a downstream stage are connected to make it possible to realize a multi-level connection, wherein

the anode control signal wiring group includes

first anode wirings one ends of which are connected commonly to one of the anode terminals of the first connector and the other ends of which are connected to one ends of all the light emitting bodies on the board, and

a second anode wiring one end of which is connected to any one of the first anode wirings, the other end of which is connected to one of the anode terminals of the second connector, and that is not directly connected to the light emitting bodies on the board, or one end of which is connected to one of the anode terminals of the first connector and the other end of which is connected to one of the anode terminals of the second connector,

the cathode control signal wiring group includes

a first cathode wiring group including at least one first cathode wiring one end of which is connected to one of the cathode terminals of the first connector and the other end of which is connected to the other end of one of the light emitting bodies on the board, and

a second cathode wiring group including at least one second cathode wiring one end of which is connected to one of the cathode terminals of the first connector, the other end of which is connected to one of the cathode terminals of the second connector, and that is not connected to the light emitting bodies on the board,

the cathode terminals in the first connector to which the first cathode wirings of the first cathode wiring group are connected configure a first cathode terminal group,

the cathode terminals in the first connector to which the second cathode wirings of the second cathode wiring group are connected configure a second cathode terminal group,

the cathode terminals in the second connector to which other ends of at least some of the second cathode wirings of the second cathode wiring group are connected configure a third cathode terminal group, and

the third cathode terminal group is physically located at the same position as that of the first cathode terminal group of the first connector of the light emitting module of the same type having the same number of first cathode wirings or the light emitting module of a different type having the different number of first cathode wirings.

2. The light emitting module according to claim 1, wherein

the second cathode wiring group includes a third cathode wiring group including the second cathode wiring that is not connected to the cathode terminals of the third cathode terminal group.

3. The light emitting module according to claim 2, wherein

the cathode terminals in the first connector to which the second cathode wirings of the third cathode wiring group are connected configure a fourth cathode terminal group,

the cathode terminals in the second connector to which the second cathode wirings of the third cathode wiring group are connected configure a fifth cathode terminal group, and

the fourth cathode terminal group in the first connector and the fifth cathode terminal group in the second connector are physically located at the same position.

4. The light emitting module according to claim 1, wherein

the number of second cathode wirings connected to the cathode terminals of the third cathode terminal group is different from the number of first cathode wirings.

5. The light emitting module according to claim 1, further comprising:

a plurality of anode terminals in each of the first connector and the second connector; and

an inter-terminal second anode wiring that is the second anode wiring one end of which is connected to one of the anode terminals in the first connector, the other end of which is connected to one of the anode terminals in the second connector, and that is not connected to the light emitting bodies on the board.

6. The light emitting module according to claim 5, wherein

the anode terminal in the second connector to which one of the inter-terminal second anode wirings of the second anode wirings is connected is physically located at the same position as the anode terminal in the first connector to which the first anode wiring of another light emitting module is connected.

7. The light emitting module according to claim 5, wherein

the first anode terminal group including the anode terminals in the first connector to which the inter-terminal second anode wirings of the second anode wirings are connected is physically located at the same position as the second anode terminal group including the anode terminals in the second connector to which the inter-terminal second anode wirings are connected.

8. The light emitting module according to claim 1, wherein the light emitting body is an LED.

9. A light emitting module unit comprising:

a plurality of light emitting modules each identical with the light emitting module according to claim 1, wherein

the light emitting modules are coupled to each other by connecting the second connector of an upstream stage and the first connector of a downstream stage to each other.

10. The light emitting module unit according to claim 9, further comprising

a part where the light emitting modules of different types the numbers of first cathode wirings of which are different from each other are coupled by connecting the second connector of an upstream stage and the first connector of a downstream stage to each other.

11. The light emitting module unit according to claim 10, further comprising

a part where the light emitting modules of the same type the numbers of first cathode wirings of which are equal to each other are coupled by connecting the second connector of an upstream stage and the first connector of a downstream stage to each other.

13. A light emitting module unit, wherein

a plurality of light emitting modules of the same type or different types are selected from light emitting modules of 1 to 5 types at most in each of which an anode control signal wiring group, a cathode control signal wiring group, and a plurality of light emitting bodies are formed on a board, and a first connector and a second connector each including at least one cathode terminal and at least one anode terminal are formed at end portions of the board, respectively,

for each of the selected light emitting modules, the second connector of an upstream stage and the first connector of a downstream stage are connected to each other to couple the light emitting modules to each other, so that all the light emitting bodies in the selected light emitting modules, the cathode terminals of the first connector in the light emitting module of the most upstream stage, and the anode terminals of the first connector in the light emitting module of the most upstream stage are electrically connected, and

the light emitting module is the light emitting module according to claim 1.

14. A backlight apparatus, wherein

a plurality of light emitting module units each identical with the light emitting module unit according to claim 9 are arranged in a direction orthogonal to a coupling direction of the light emitting modules.

15. A transmission display apparatus comprising

a transmission display panel that changes a transmittance of light for each display region to use transmitted light in display;

and

the backlight apparatus according to claim 14, wherein

light is radiated from the backlight apparatus on a backside of the transmission display panel to perform display.

12. A light emitting module unit, wherein

a plurality of light emitting modules of the same type or different types are selected from light emitting modules of 1 to 5 types at most in each of which an anode control signal wiring group, a cathode control signal wiring group, and a plurality of light emitting bodies are formed on a board, and a first connector and a second connector each including at least one cathode terminal and at least one anode terminal are formed at end portions of the board, respectively, and

for each of the selected light emitting modules, the second connector of an upstream stage and the first connector of a downstream stage are connected to each other to couple the light emitting modules to each other, so that all the light emitting bodies in the selected light emitting modules, the cathode terminals of the first connector in the light emitting module of the most upstream stage, and the anode terminals of the first connector in the light emitting module of the most upstream stage are electrically connected.

16. A backlight apparatus, wherein

a plurality of light emitting module units each identical with the light emitting module unit according to claim 12 are arranged in a direction orthogonal to a coupling direction of the light emitting modules.

17. A transmission display apparatus comprising:

a transmission display panel that changes a transmittance of light for each display region to use transmitted light in display; and

the backlight apparatus according to claim 16, wherein

light is radiated from the backlight apparatus on a backside of the transmission display panel to perform display.