JPH0412537Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure that allows the electrode portion of a cold cathode fluorescent tube to be maintained at a set temperature.

[Conventional technology]

Cold cathode fluorescent tubes have been used as light sources for backlighting in liquid crystal displays. A lighting device using this cold cathode fluorescent tube is
A plurality of cold cathode fluorescent tubes were arranged side by side to illuminate the front liquid crystal display screen as surface illumination, and a radiator was provided at the back.

[Problem that the invention attempts to solve]

However, in the above lighting device,
Since the electrode part of the cold cathode fluorescent tube is simply connected to a socket and supported, the temperature of the electrode part rises above the temperature range where high brightness can be obtained from the cold cathode fluorescent tube. There was a problem that it did not provide an efficient light source.

[Means for solving problems]

The present invention was devised in consideration of the above-mentioned conventional problems, and involves covering both electrode portions of a cold cathode fluorescent tube in close contact with a rubber support with good thermal conductivity, and covering each of the rubber supports with a heat conductive rubber support. By attaching and fixing the device in close contact with the heat radiator, the above-mentioned conventional problems are solved.

[Effect]

In this invention, the heat from the electrode part is transmitted to the radiator through the rubber support that tightly covers the electrode part and supports the cold cathode fluorescent tube, and the heat radiator is used to radiate the heat to the outside. .

〔Example〕

Next, the present invention will be explained in detail based on an embodiment shown in FIGS. 1 and 2.

1 in the figure is an illumination device, with multiple cold cathode fluorescent tubes 2
A cover 4 having a light diffusing plate 40 corresponding to the surface on which the cold cathode fluorescent tube is disposed is attached to a heat radiator 3 having a radiator 3 disposed on its upper surface.

Reference numeral 5 in the figure denotes a rubber support provided on both sides of the upper surface of the radiator 3, and the rubber support 5 has a plurality of inserts into which the electrode portions 20 of the plurality of cold cathode fluorescent tubes 2 are respectively inserted. Mounting holes 50 are provided, and the electrode portions 20 of the cold cathode fluorescent tubes 2 are inserted into each of the mounting holes 50 in a close contact manner so as to be covered, thereby supporting the cold cathode fluorescent tubes. It has come to play the role of a buffer material that absorbs shock from the outside.

The rubber support body 5 is provided with an upper member 51 and a lower member 52, and can be divided into upper and lower halves.By combining the upper member 51 and the lower member 52, a predetermined interval can be set between each. The recesses a located side by side face each other to form the insertion hole 50.

Each of the rubber supports 5 is covered with a fixing metal fitting 6 as shown in FIG. It is fixed to both sides of the upper surface, and the lower surface of the lower member 52 and the upper surface of the radiator 3 are closely joined.

Further, the rubber support 5 is formed with good thermal conductivity, and the thermal conductivity can be set by selecting the molding material. For example, fine particles such as boron nitride are added to silicone rubber. It has improved thermal conductivity. The electrode portion 2 of the cold cathode fluorescent tube 2 is inserted into the insertion hole 50.
The heat from 0 is easily transmitted to the radiator 3, and the heat radiator 3
It is provided so that the temperature of the electrode part 20 does not rise above a predetermined temperature due to heat radiated from the electrode part 20 to the outside,
The temperature of the electrode section 20 during lighting is maintained at a predetermined temperature, that is, the temperature at which high brightness can be obtained from the cold cathode fluorescent tube, and the surface temperatures of the electrode section and the central section of the cold cathode fluorescent tube are approximately the same. The temperature of the internal atmosphere becomes even, and the brightness becomes uniform.

[Effect of idea]

As explained above, according to the present invention, both electrode portions of a cold cathode fluorescent tube are covered in close contact with a rubber support having good thermal conductivity, and each of the rubber supports is in close contact with a radiator. Since the electrode part generates heat during lighting, it is easily transmitted to the heat radiator through the rubber support that also serves as a cushion body, and the heat is radiated from the heat radiator, which prevents cooling from external shocks. In addition to preventing damage to the cathode fluorescent tube, it also prevents excessive temperature rise in the electrode section, allowing high brightness to be obtained from the cold cathode fluorescent tube, providing a highly efficient light source, and is highly practical. It has the following effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a mounting structure for a cold cathode fluorescent tube according to the present invention, and FIG. 2 is an explanatory diagram showing a main part of the embodiment. 1...Lighting device, 2...Cold cathode fluorescent tube, 3...
Heat sink, 5...Rubber support.

Claims (1)

[Scope of utility model registration request] A cold cathode fluorescent tube characterized in that both electrode parts of a cold cathode fluorescent tube are closely covered with rubber supports having good thermal conductivity, and each of the rubber supports is attached and fixed to a radiator in close contact. Light tube mounting structure.