JP2006185810A - Serpentine lamp for liquid crystal display backlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a serpentine lamp used as a backlight. <P>SOLUTION: The serpentine lamp comprises an electrode fitted to the side face of a plate, a conduit which is installed to the plate by being bent and folded in multiplex and has the inner peripheral part covered by a fluorescent material and filled with a discharge gas, and an insulator which has gap between the electrode and the bending portion of the conduit adjacent to the electrode. The electrode and the conduit are insulated by an insulator, and thereby interference by a voltage phase difference becomes minimum. Thermal conduction from the electrode is suppressed in order to prevent blackening. Since heat is shut off, the life of the serpentine lamp is prolonged. The stability and uniformity of light emission are secured to maintain high luminance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a serpentine lamp, particularly caused by a voltage difference between an electrode and a conduit to prevent the lamp from being damaged and to provide a uniform light source with high brightness. The present invention relates to an improved serpentine lamp for a backlight capable of suppressing blackening.

  Usually, a cathode ray tube (CRT) is used as a display for a television receiver, a measuring instrument, an information terminal, etc. In order to meet the demand for a small and light electronic product, a liquid crystal display device ( LCD) is being used.

  Unlike LCD display panels and field emission displays, LCDs use an independent light source that uniformly illuminates the image display surface for viewing images displayed on LCD panels, because they use the electromagnetic characteristics of liquid crystal injected into the panel. As a backlight is necessary.

  6 and 7 are diagrams showing an example of a conventional serpentine lamp 10. As shown in the figure, the conventional serpentine lamp 10 includes an electrode 20 and a conduit portion 30 provided on the upper surface of the plate 40, and the electrode 20 and the conduit portion 30 are bent in multiples so as to communicate with each other.

  The electrode 20 and the conduit portion 30 are connected to each other only by melting the glass powder. When electric power is supplied to the electrode 20, the discharge gas filled in the conduit portion 30 discharges electricity in order to excite the fluorescent material covering the inner wall of the conduit portion 30. As a result, light is emitted and the serpentine lamp 10 can be used as a backlight.

  However, since the conventional serpentine lamp 10 has a long discharge path, a high voltage is required when operating the serpentine lamp. The high voltage causes interference between the electrode 20 and the conduit portion 30, so that the seal of the electrode 20 is formed by a fine opening. Accordingly, a discharge path is formed in the seal, thereby shortening the light of the serpentine lamp and generating heat that causes damage.

  In other words, because the glass powder is melted without a buffer (insulation) band, the electrode 20 and the conduit portion 30 are connected in a short gap, so that the supply voltage to the electrode 20 and the discharge voltage from the conduit portion 30 are Blackening occurs due to interference between the two. As a result, the lamp is damaged and the life of the serpentine lamp is significantly shortened.

  Accordingly, the present invention has been made in view of the above and / or other problems, and the object of the present invention is to provide a gap between an electrode that functions as a buffer band, for example, an insulator, and a conduit portion, and supply voltage and discharge. An object of the present invention is to provide a serpentine lamp mainly used as a backlight, which prevents blackening due to the voltage difference and damage to the serpentine lamp by suppressing interference due to the voltage difference.

  According to the present invention, the above and other objects include an electrode part 110, 110 'and a conduit part 120, 120'. The conduit part 120, 120 'is provided in multiple folds and covered with a fluorescent material. And has a gap between the electrode parts 110 and 110 ′ and the bent parts of the conduit parts 120 and 120 ′ adjacent to the electrode parts 110 and 110 ′. This is achieved by providing a serpentine lamp 100 with an insulator 130.

  According to the present invention, the above and other objects also include an electrode portion 110 attached to the side surface of the plate 200 and an inner peripheral portion that is attached to the plate 200 by being bent in multiple layers and covered with a fluorescent material. This is achieved by providing a serpentine lamp 100 comprising a filled conduit portion 120 and an insulator 130 having a gap between the electrode portion 110 and a bent portion of the conduit portion 120 adjacent to the electrode portion 110. .

  The insulator 130 preferably has an open end through which external air can freely enter and exit.

  The present invention also includes a plate 200 made of a glass substrate, attached to the side of the plate 200, made of the same material as the plate, made of the same material as that of the plate 200, and semicircular electrode portions 110 and 110 ′ having electrodes. A multi-folded and attached to the side surface of the plate 200, each of which communicates with the electrode portions 110 and 110 ′, has an inner peripheral portion covered with a fluorescent material, is filled with a discharge gas, and is sealed in a semicircular shape Insulation made of the same material as the plate 120, 120 ′ and the plate, with a gap between the electrode 110, 110 ′ and the bent portion of the conduit 120, 120 ′ adjacent to the electrode 110, 110 ′ A serpentine lamp 100 including a body 130 is provided.

  These and / or other objects and advantages of the present invention will be clearly and readily understood by the following examples which will be described with reference to the accompanying drawings.

  Next, a serpentine lamp according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a front view illustrating a preferred embodiment of a serpentine lamp according to the present invention, FIG. 2 is a cross-sectional view taken along line BB in FIG. 1, and FIG. 3 is a line CC in FIG. 4 is a cross-sectional view illustrating another embodiment of the serpentine lamp of the present invention similarly to FIG. 2, and FIG. 5 is a plan cross-sectional view of the serpentine lamp similar to FIG. is there.

  As shown in FIGS. 1 and 3, a serpentine lamp 100 according to a preferred embodiment of the present invention includes a plate 200, an electrode portion 110 to which a voltage provided on the plate 200 is supplied, and the electrode portion 110 connected to each other. And a conduit portion 120 filled with a discharge gas, and an insulator 130 disposed between the electrode portion 110 and the conduit portion 120.

  The plate 200 has a quadrangular shape and is preferably made of glass.

  As shown in FIG. 1, the electrode part 110 is provided on the upper surface of the plate 200, is formed of molten glass powder, has a semicircular cross section, and is attached in parallel with the upper side of the plate 200. It is done.

  In particular, the electrode connection devices 112 a and 112 b are formed in a part of the electrode unit 110, and the positive and negative electrodes 114 a and 114 b are inserted into the electrode unit 110.

  Furthermore, the positive and negative electrodes 114a and 114b are separated from each other by a part of the electrode part 110, that is, the center part on the upper side of the plate 200 and the end part of the electrode part 110 are sealed.

  In other words, only the electrode connecting devices 112a and 112b are opened, and the other part of the electrode part 110 is sealed.

  An electrode to which power is supplied is inserted horizontally into the electrode portion 110 in the longitudinal direction.

  The conduit portion 120 is bent in multiple directions and is disposed on the upper surface of the plate 200 in the longitudinal direction. As shown in FIG. 1, the cross-sectional shape of the conduit portion 120 is the same as that of the electrode portion 110. Communicates with the electrode section 110.

  Similar to the electrode portion 110, the conduit portion 120 is attached to the upper surface of the plate 200, is formed from molten glass powder, and has a semicircular cross section. The conduit portion 120 has an inner peripheral portion coated with a fluorescent material.

  The conduit part 120 is filled with a discharge gas and is separated from the electrode part 110 on the plate 200.

  In other words, as shown in FIG. 1, electrode connecting devices 112 a and 112 b are attached, and the electrode portion 110 arranged along the upper side of the plate 200 and the bent portion of the conduit portion 120 bent in multiple directions are mutually connected. The space is formed between the bent portion and the electrode portion 110.

    The insulator 130 is disposed in a space between the electrode part 110 and the bent part, and is formed by inserting a substantially T-shaped tube between the electrode part 110 and the bent part.

  The insulator 130 is made of molten glass, has a substantially semicircular cross section, and has a hollow interior used as the airway 132.

  Furthermore, the radius of the insulator 130 is preferably smaller than the radius of the electrode part 110 and the conduit part 120.

  An exhaust / intake port 134 (open end) is formed in the longitudinal direction at the center of the insulator 130. The exhaust / intake port 134 communicates with the airway 132 so that external air can freely enter the insulator 130.

  Therefore, in order to suppress interference between voltage phase differences, the electrode part 110 and the conduit part 120 are insulated by an insulator that functions as a buffer space.

  On the other hand, as shown in FIGS. 4 and 5, the semicircular electrode portions 110 and 110 ′ provided on the side surface of the plate 200, the electrode portions 110 and 110 ′ having the same shape as the conduit portion 120 of the above embodiment, and By joining two identically shaped halves each consisting of connected conduit portions 120, 120 ′ and insulators 130, 130 ′ disposed between electrode portions 110, 110 ′ and conduit portions 120, 120 ′. A serpentine lamp according to another embodiment of the invention is manufactured.

  A serpentine lamp according to another preferred embodiment of the present invention is formed by symmetrically joining two halves having a semicircular cross section, and is formed longitudinally or widthwise to form a circular passage. The electrode portions 110 and 110 ′ attached to the electrodes and the inner peripheral portion covered with the fluorescent material joined and communicated with each other in the same manner as the electrode portions 110 and 110 ′ are filled with the discharge gas. An airtight circular conduit portion 120, 120 ′ and an insulator 130 having a gap between the electrode portion 110, 110 ′ and a bent portion of the conduit portion 120, 120 ′ adjacent to the electrode portion 110, 110 ′. , 130 ′.

  The structure and connection relationship of the components of the serpentine lamp according to another embodiment of the present invention is the preferred embodiment of the present invention, except that the plate 200 is removed and two identical halves of the serpentine lamp are face-to-face bonded. Identical to those of the serpentine lamp.

  The operation of the serpentine lamp according to this embodiment of the invention will now be described.

  When voltage is supplied to the electrodes 114a and 114b inserted in the electrode portions 110 and 110 ', plasma discharge is generated by the discharge gas filled in the conduit portions 120 and 120'.

  This plasma discharge generates high-temperature electrons that excite atoms and molecules of the neutral gas, and the atoms and molecules are excited by the electrons, thereby falling to the ground state where ultraviolet rays are generated.

  In order to be used as a serpentine lamp, the generated ultraviolet light excites a fluorescent material covering the inner periphery of the conduit portions 120 and 120 'to emit light.

  At this time, since the electrode portions 110 and 110 ′ and the conduit portions 120 and 120 ′ are insulated by the insulators 130 and 130 ′ through which external air enters and exits, the supply voltage to the electrode portions 110 and 110 ′ and the conduit portions 120 and 120 are reduced. The interference due to the phase difference between the discharge voltage from 'is significantly reduced.

  Further, since the heat conduction of the electrode caused by the voltage phase difference is hindered by the insulators 130 and 130 ', blackening of the conduit portions 130 and 130' is remarkably suppressed.

  According to the serpentine lamp of the present invention, the above phenomenon is prevented, so that stable and uniform light emission and high brightness for maximizing the utility of the backlight can be achieved.

  Furthermore, the serpentine lamp of the present invention can be used in various areas that require a light emitter, particularly for backlights for liquid crystal displays.

  As described above, the serpentine lamp of the present invention has the following advantages.

  First, the electrode portion and the conduit portion are insulated by an insulator, and interference due to a voltage phase difference is minimized.

  Secondly, heat conduction from the electrode is suppressed and blackening is also prevented.

  Third, the heat is cut off and the life of the serpentine lamp is extended.

  Fourth, stable and uniform light emission is ensured and high brightness can be maintained.

  While the preferred embodiment of the present invention has been disclosed for purposes of illustration, those skilled in the art may make various modifications, additions and alternatives without departing from the scope and spirit of the invention as disclosed in the appended claims. You will understand that.

1 is a front view illustrating a preferred embodiment of a serpentine lamp of the present invention. The cross-sectional view along the BB line of FIG. The cross-sectional view along CC line of FIG. FIG. 6 is a cross-sectional view illustrating another embodiment of the serpentine lamp of the present invention. The cross-sectional view of a serpentine lamp. The front view of the conventional serpentine lamp. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6.

Explanation of symbols

10: Serpentine lamp 20: Electrode 30: Conduit section 40: Plate 100: Serpentine lamp 110, 110 ': Electrode sections 112a, 112b: Electrode connection devices 114a, 114b: Electrodes 120, 120': Conduit sections 130, 130 ': Insulation Body 132: Airway 134: Exhaust / intake port (open end)
200: board

Claims (4)

It consists of an electrode part and a conduit part,
The conduit part is provided with multiple bends, has an inner periphery covered with a fluorescent material, and is filled with a discharge gas,
A serpentine lamp comprising: an insulator having a gap between the electrode portion and the bent portion of the conduit portion adjacent to the electrode portion. An electrode attached to the side of the plate;
A conduit portion that is folded in multiple and attached to the plate and has an inner periphery covered with a fluorescent material and filled with a discharge gas;
A serpentine lamp comprising: an insulator having a gap between the electrode portion and the bent portion of the conduit portion adjacent to the electrode portion. An electrode portion formed by symmetrically joining two halves having a semicircular cross section, the cross section being formed in a longitudinal or width direction to form a circular passage, and attached to the electrode;
An airtight circular conduit portion filled with a discharge gas, having an inner peripheral portion coated with a fluorescent material joined and communicated with each other in the same manner as the electrode portion;
A serpentine lamp comprising: an insulator having a gap between the electrode portion and the bent portion of the conduit portion adjacent to the electrode portion.   The serpentine lamp according to any one of claims 1 to 3, wherein the insulator has an open end portion through which external air freely enters and exits.

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