KR20060010544A - Flat type fluorescent lamp - Google Patents

Abstract

The present invention is to provide a surface light emitting lamp suitable for realizing partial luminance, the surface light emitting lamp for achieving the above object is a combined upper, lower substrate; A first electrode pattern patterned in a plate shape on an inner surface of the upper substrate; A plurality of second electrode patterns patterned in a matrix shape on the lower substrate; A first power line connected to apply a voltage to the first electrode pattern; In order to apply a voltage to the plurality of second electrode patterns, the first electrode pattern includes a plurality of second power lines connected to correspond to the second electrode patterns one to one. It is characterized by being.

Surface emitting, electrode pattern, power line

Description

Surface Emitting Lamp {FLAT TYPE FLUORESCENT LAMP}

1 is a view illustrating a structure of a direct backlight unit according to the related art

2 is an exemplary view illustrating a structure of a surface light emitting lamp according to another conventional technology

3 is a perspective view of a surface emitting lamp according to an embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

30: upper substrate 31: lower substrate

32: first electrode pattern 33: second electrode pattern

34: first power line 35: second power line

The present invention relates to a backlight unit, and more particularly to a surface emitting lamp suitable for realizing the peak brightness.

CRT (Cathode Ray Tube), one of the commonly used display devices, is mainly used for monitors such as TVs, measuring devices, and information terminal devices.However, due to the weight and size of the CRT itself, Could not respond actively to demands.                         

Therefore, in the trend of miniaturization and weight reduction of various electronic products, CRT has a certain limit in weight and size, and is expected to replace the liquid crystal display device (LCD) using the electro-optic effect, and gas discharge. There are plasma display panels (PDPs) and electroluminescent displays (ELDs) using electroluminescent effects, among which researches on liquid crystal displays (LCDs) are being actively conducted.

In order to replace the CRT, liquid crystal display devices having advantages such as small size, light weight, and low power consumption have been actively developed. In recent years, an ultra-thin flat display display having a thickness of only a few centimeters (Cm) is used. Developed enough to fulfill its role as a device, it is used in spacecraft, aircraft, laptop computers, laptop computer monitors, desktop computer monitors, and large information display devices. The demand for liquid crystal display devices continues to increase. to be.

Since most of the liquid crystal display devices are light-receiving devices that display images by controlling the amount of light coming from the outside, a separate light source, that is, a backlight unit, for irradiating light to the LCD panel is necessary.

In general, a backlight unit used as a light source of a liquid crystal display device is classified into an edge method and a direct method according to a method of arranging a cylindrical light emitting lamp.

First, the edge method is that the lamp unit is installed on the side of the light guide plate for guiding the light, the lamp unit is a lamp that emits light, the lamp holder which is inserted at both ends of the lamp to protect the lamp and the outer peripheral surface of the lamp and one side It is provided with a lamp reflector plate fitted to the side of the light guide plate to reflect the light emitted from the lamp toward the light guide plate.

The edge method in which the lamp unit is installed on the side of the light guide plate is applied to a relatively small liquid crystal display device such as a monitor of a laptop computer and a desktop computer, and has good light uniformity and a long durability life. It is advantageous to thin the liquid crystal display device.

On the other hand, the direct method began to be developed mainly as the size of the liquid crystal display device became larger than 20 inches, and arranged a plurality of lamps in a row on the lower surface of the diffuser plate to direct light directly to the front of the LCD panel. will be.

The direct method is mainly used for a large screen liquid crystal display device requiring high luminance because the light utilization efficiency is higher than that of the edge method.

However, the liquid crystal display device adopting the direct method is used as a large monitor or a television, so it takes longer to use than a laptop computer and the number of lamps is larger, so that the liquid crystal of the direct method is lower than the edge type liquid crystal display device. It is more likely that a lamp that will not turn on will appear due to the failure and life of the lamp in the display.

In addition, in the edge method in which the lamp units are installed on both side surfaces of the light guide plate, due to the life and failure of the lamp, for example, when only one lamp is not turned on, only the brightness on the screen is lowered. However, in the direct method, since a plurality of lamps are installed at the bottom of the screen, for example, due to the life and failure of the lamp, if one lamp does not light up, the part where the lamp is not lit becomes significantly darker than the other part. The part that does not appear immediately on the screen.                         

For this reason, since the lamp is frequently replaced in the direct type liquid crystal display device, the direct type liquid crystal display device should have an easy structure for disassembling and assembling the lamp unit.

Hereinafter, a backlight unit according to the related art will be described with reference to the accompanying drawings.

1 is a diagram illustrating a structure of a direct type backlight unit according to the related art, and FIG. 2 is a diagram illustrating a structure of a surface emitting lamp according to another conventional technique.

As shown in FIG. 1, the backlight unit according to the related art includes a plurality of light emitting lamps 1, an outer case 3 for fixing and supporting the light emitting lamps 1, and the light emitting lamps 1. And light scattering means 5a, 5b, 5c disposed between the liquid crystal panel (not shown).

The light scattering means (5a, 5b, 5c) is to prevent the shape of the light emitting lamp from appearing on the display surface of the liquid crystal panel and to provide a light source having an overall uniform brightness distribution, in order to enhance the light scattering effect A plurality of diffusion sheets, diffusion plates, and the like are disposed between the cells.

The inner surface of the outer case 3 is disposed with a reflector 7 so that the light emitted from the light emitting lamp 1 can be concentrated to the display unit of the liquid crystal panel, which is to maximize the utilization efficiency of the light.

The light emitting lamp 1 is a Cold Cathode Fluorescent Lamp (CCFL), and electrodes are disposed at both ends of a tube to emit light when power is applied to the electrodes, and both ends of the light emitting lamp 1 are discharged. Is fitted into grooves formed on both sides of the outer case 3.

Power lead wires 9 and 9a for transmitting power for driving the lamp are connected to both electrodes of the light emitting lamp, and the power lead wires 9 and 9a are connected to a separate connector and connected to the driving circuit. Therefore, a separate connector is required for each light emitting lamp 1.

That is, the power lead wire 9 connected to one electrode of the light emitting lamp and the power lead wire 9a connected to the other electrode are connected to one connector, and one of the power lead wires 9 and 9a is connected to the outer case 3. Bends down to connect with the connector.

As described above, the backlight unit used as a light source using a plurality of tube-type lamps is expensive to manufacture because there are many kinds of required parts, and when one lamp is not lit, the part where the lamp is not lit is significantly darker than the other parts. Since the portion where the lamp is not turned on immediately appears on the screen, there is a problem that the uniformity of the lamp brightness is lowered.

In order to solve this problem, a surface emitting lamp which can be used as a backlight itself has been proposed.

As shown in FIG. 2, the surface light emitting lamp according to the related art maintains a constant gap between the upper and lower substrates 20 and 21 and the upper and lower substrates 20 and 21 bonded to each other with a predetermined gap. It is composed of the support 22 formed in one region so that the anode and cathode electrodes 23, 24 alternately arranged on the lower substrate 21. Mixed gas of Ne, Hg, and Xe enters between the upper and lower substrates 20 and 21 bonded to each other.                         

Such a surface emitting structure can save product cost and can emit light to the upper side, thereby improving the brightness uniformity of the lamp. However, there is a limit to realizing dynamic brightness and high contrast ratio. There is.

The present invention has been made to solve the above problems, and in particular, an object of the present invention is to provide a surface emitting lamp suitable for realizing partial luminance.

According to an aspect of the present invention, there is provided a light emitting lamp comprising: an upper and lower substrates bonded thereto; A first electrode pattern patterned in a plate shape on an inner surface of the upper substrate; A plurality of second electrode patterns patterned in a matrix shape on the lower substrate; A first power line connected to apply a voltage to the first electrode pattern; In order to apply a voltage to the plurality of second electrode patterns, the first electrode pattern includes a plurality of second power lines connected to correspond to the second electrode patterns one to one. It is characterized by being.

The second electrode patterns may include at least one of a transparent conductive film and a reflective electrode material having high reflectance, or at least one conductive metal film such as chromium, silver (Ag), copper, aluminum, aluminum alloy (AlNd), tantalum, and molybdenum (Mo). It is characterized by.

The transparent conductive film is made of one of Indium-Tin-Oxide (ITO), Indium-Zinc-Oxide (IZO), and Indium-Tin-Zinc-Oxide (ITZO).

A mixture gas of Ne, Hg, and Xe enters between the bonded upper and lower substrates, and a phosphor is coated on an inner surface of the first electrode pattern of the upper substrate.

Hereinafter, a surface light emitting lamp according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a perspective view of a surface light emitting lamp according to an embodiment of the present invention.

As shown in FIG. 3, the surface light emitting lamp according to an exemplary embodiment of the present invention may include a bonded upper and lower substrates 30 and 31 and a first patterned plate on an inner surface of the upper substrate 30. An electrode pattern 32, a plurality of second electrode patterns 33 patterned in a matrix shape on the lower substrate 31, and a first electrode connected to apply a voltage to the first electrode pattern 32; It is composed of a power line 34 and a plurality of second power line 35 connected to correspond to each of the second electrode pattern 33 in a one-to-one correspondence for applying a voltage to the plurality of second electrode patterns 33. .

A mixed gas of Ne, Hg, and Xe enters the upper and lower substrates 30 and 31 bonded to each other, and a phosphor is coated on an inner surface of the first electrode pattern 32 of the upper substrate 30.

Although not shown in the drawings, a support is further provided in one region therebetween to maintain the gap between the upper and lower substrates 30 and 31, and the first and second electrode patterns 32 and 33 Voltages may be applied through the first and second power lines 34 and 35, respectively. That is, the first and second electrode controllers for controlling the first and second electrode patterns 32 and 33 are separately provided.                     

The upper and lower substrates 30 and 31 are made of transparent glass.

The first electrode pattern 32 is composed of a transparent conductive film, and the second electrode pattern 33 is a transparent conductive film or a reflective electrode material having high reflectance, but chromium, silver (Ag), copper, aluminum, and aluminum alloy. It is comprised by at least one of conductive metal films, such as (AlNd), tantalum, and molybdenum (Mo). In this case, when the second electrode pattern 33 is made of a reflective electrode material, the second electrode pattern 33 may exhibit an excellent luminous effect.

At this time, the transparent conductive film is made of one of Indium-Tin-Oxide (ITO), Indium-Zinc-Oxide (IZO), and Indium-Tin-Zinc-Oxide (ITZO).

As described above, the first and second electrode patterns 32 and 33 may be formed on the upper and lower substrates 30 and 31, and driving voltages may be individually applied to the electrode patterns through the first and second power lines. As a result, peak luminance can be realized.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the above embodiments, but should be defined by the claims.

The surface-emitting lamp according to the present invention as described above has the following effects.

By providing first and second electrode patterns on the upper and lower substrates, and connecting the first and second power lines to separately apply voltage to each electrode pattern, a surface light emitting lamp capable of controlling partial luminance may be provided. Can be.

Claims (5)

Bonded upper and lower substrates; A first electrode pattern patterned in a plate shape on an inner surface of the upper substrate; A plurality of second electrode patterns patterned in a matrix shape on the lower substrate; A first power line connected to apply a voltage to the first electrode pattern; And a plurality of second power lines connected one-to-one to each of the second electrode patterns to apply voltage to the plurality of second electrode patterns. The method of claim 1, The first electrode pattern is a surface light emitting lamp, characterized in that composed of a transparent conductive film. The method of claim 1, The second electrode patterns may include at least one of a transparent conductive film and a reflective electrode material having high reflectance, or at least one conductive metal film such as chromium, silver (Ag), copper, aluminum, aluminum alloy (AlNd), tantalum, and molybdenum (Mo). Surface-emitting lamp, characterized in that. The method of claim 2 or 3, The transparent conductive film is an indium-tin-oxide (ITO), indium-zinc-oxide (IZO), indium-tin-zinc-oxide (ITZO) characterized in that the surface light emitting lamp, characterized in that composed of one material. The method of claim 1, Between the bonded upper and lower substrates are mixed gas of Ne, Hg, Xe, Surface-emitting lamp, characterized in that the phosphor is coated on the inner surface of the first electrode pattern of the upper substrate.

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