TW200837456A - Light source apparatus and backlight module - Google Patents

Abstract

An apparatus of light source, which can be used to forma backlight module, includes a cathode structure, an anode structure, a fluorescent layer, a second electron generation layer, and a low-pressure gas layer. The fluorescent layer is located between the cathode structure and the anode structure. The low-pressure gas layer is filled between the cathode structure and the anode structure. The second electron generation layer can generate second electrons to hit the fluorescent layer for improving the performance of the light source.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device, and more particularly to a planar light source device that can be used in a liquid crystal backlight module. [Prior Art] In the daily life of the financial device is used (four). Conventional light sources, such as light bulbs, are substantially point-like by the filaments that generate visible light due to high temperatures. The subsequent tubular light source is also picked up! X is on display. After a long period of development and change, a planar light source device has also been proposed and widely used on flat panel displays. Ο ϋ and shoot. Here, the electrode structure 1 is a light-emitting surface, which is generally a light-transmitting material composed of a glass substrate and a transparent conductive layer of tin oxide (IT〇). There are many kinds of mechanisms that can produce light sources. Figure u shows a schematic cross-sectional view of a conventional planar light source device mechanism. Please participate! The illuminating mechanism is by the second electric power, the structures 100, 102 are connected with the power source 106, and generate electricity at the operating voltage, and the gas is discharged by the gas, which is also called electric discharge (the pia brewing plate (four) phantom mode causes the gas 104 to be freed. To generate electrons 11. The electrons n〇 are accelerated by the electric field and impinge on the glare layers 108a, 108b, l8c corresponding to red, green and blue on the electrode structure. The visible light 112 is generated by the action of the glory layer. The mechanism is a field Emission mechanism such as f 2 . Figure 2 illustrates a cross-sectional view of another conventional planar light source device mechanism. The conventional planar light source device includes a glass substrate 120, a cathode 5 200837456 P55950136TWC2 23180-2twf. The doc/n structure layer 122, the plurality of conical conductors 124, a gate layer 126, an anode structure layer 128 and a phosphor layer 130. The cathode structure layer 122 is disposed on the glass substrate 120. The cathode structure layer 122 is disposed on the cathode structure layer 122. There are a plurality of conical conductors 124. A gate layer i26 (Gate layer) is disposed on the conical conductor 124. The conical conductor 124 has a plurality of holes on the gate layer 126. The anode structure layer 128 has a transparent anode Layer disposed on a glass substrate. Another

In addition, the phosphor layer 130 is disposed on the anode structure layer 128. The electrons 132 escape from the tip end of the conical conductor 124 by a high electric field between the anode and the cathode, and are accelerated by the electric field to impinge on the phosphor layer 130 to emit visible light. The above two conventional illumination mechanisms each have advantages and disadvantages. The way the gas is discharged is easy to produce and the structure is simple, but the disadvantage is that the process needs to generate plasma, which is very power-hungry. The light source of the field emission is a kind of cold light source, and the principle is similar to that of the polar ray officer (CRT), which causes electrons to escape from the cathode by a high electric field between the anode and cathode, and then impinges on the phosphor powder coated on the anode. It shines. The advantage is that the brightness is high and the power is saved, and it is easy to be made into a planar structure, and the disadvantage is that the material that grows or coats uniformly on the cathode, such as a needle structure, or a nephew. Carbon tube. ^ Lights need to be separated by a bracket, and the vertical distance between the 1% poles needs to be carefully taken. Since the allowable error egg == application will increase the cost of many structural designs and yields. The uniformity of the i-X light redundancy is also difficult to control. Also, one of the straight ^ questions. The package of one or two is also [invention] 200837456 P55950136TWC2 23180-2twf.doc/n The present invention provides a light source device which can be easily fabricated into a planar light source without the need of degree, and has a true efficiency and can be lower The working voltage operates. The children are, and they shine. The present invention provides a light source device, which is a light source device, comprising: a cathode structure, ^' as a light-emitting surface. An anode structure having a photo-characteristic of the cathode structure pair ^'. The phosphor layer is located between the cathode structure and the anode structure: - a low pressure gas layer filled in the cathode structure and the anode structure and the low pressure gas layer having the function of uniformly emitting electrons from the cathode. The pressurized gas layer has a large electron mean free path that allows electrons to strike the phosphor layer directly at two voltages to produce the desired light. ’,

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The invention further proposes a light source device comprising a cathode structure, a first characteristic; an anode structure, a pie cathode structure facing, having a light transmitting property. A discharge layer is on at least one of the cathode structure and the anode structure. A phosphor layer is located between the negative structure and the anode junction, and the gas layer is filled between the cathode structure and the anode structure, and the low (four) body layer is dangerous. The health gas layer has a large electron average: from the road control, the electron can directly hit the axis of the light layer under the operating voltage. The invention further provides a backlight device comprising at least a device providing at least an operating voltage; and - a lighting unit comprising, to/or a light emitting panel, the light emitting panel being controlled by the operating voltage. It is such that the = plate comprises a cathode structure; an anode structure is located in the cathode structure pair. a phosphor layer between the cathode structure and the anode structure; and 7 200837456 P55950136TWC2 23180-2twf.doc/n a low pressure gas layer filled in the cathode structure of the gentleman low pressure gas layer having induced cathode uniform emission ; the work; the pressure gas layer has a large electron mean free path, so that the second: low pressure can directly hit the phosphor layer.上述 作 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为 为,

i) [Embodiment] The following examples are given to illustrate the features of the present invention. The present invention is not limited to the embodiments. 1 - An embodiment FIG. 3 is a cross-sectional view of a light source device according to an embodiment of the present invention. Referring to FIG. 3, the light source device includes a cathode structure 3〇2&, an anode structure 304a, a phosphor layer 3〇6, a secondary electron generating layer 3〇8 spot, and a low pressure gas layer 310. The material of the cathode structure 302a is a vapor-deposited metal layer or a transparent conductive material on the glass substrate. The anode structure 304a is located opposite the cathode structure 302a. The anode structure 304a is a light transmitting structure made of, for example, indium tin oxide (ITO), fluorine-doped tin oxide (FT0) or other transparent conductive oxide layer (TC0) material. Cathode structure 302a and anode structure 304a can, for example, comprise a substrate and an electrode layer on the substrate. The actual structure of the cathode structure 3〇2& and the anode structure 304a may vary depending on the actual design, as will be understood by those skilled in the art, and the description will not be continued here. The phosphor layer 306 is disposed between the cathode structure 302a and the anode structure 3〇4a 8 200837456 P55950136TWC2 23180-2twf.doc/n, which is generally disposed, for example, on the anode structure 304a. The secondary electron generating layer 308 is disposed on the cathode structure 302a. The material of the secondary electron generating layer 308 may be magnesium oxide (MgO), yttrium oxide (Tb203), lanthanum oxide (La2〇3) or cerium oxide (Ce〇2). The low-pressure gas layer 310 is disposed between the cathode structure 302 and the anode structure 304, wherein a low-pressure gas is filled, for example, in the range of 8ΧΠΤ1 to lxur3 torr, which for example makes the electron mean free path greater than about 5 mm °

(J) In one embodiment, the light source device shown in FIG. 3 further includes a side wall structure 312 that isolates the cathode structure 302a from the anode structure 3〇4a by a distance while also enclosing the low pressure gas layer 31〇 for filling The low-pressure gas. The embodiment of the present invention utilizes a rare gas to easily lead electrons to uniformly generate a sufficient amount of electrons 320, and utilizes a field emission mechanism to allow the free electrons 320 to strike the phosphor layer. |文tf,j凡.The free positive ions 322 in the field will impact the secondary electron generating layer 3〇8, when the positive ions hit the secondary electron generating layer, the secondary electrons 324 can be generated to hit the fluorescent layer. In the present embodiment, the anode structure 3〇4a is a light transmitting structure, and therefore, when the spurs 32 〇 strike the phosphor layer 3〇6, the generated light MO passes through the anode. The light source device is also referred to as a transmissive light source device. In addition, the 3 through-cathode structure 3〇2a can be a highly reflective Monzonian south reflectance and increase the luminous efficiency and luminous efficiency. Human gas is used to induce the cathode to be hooked' The gas used has no special requirements, body or mixed gas. The gas used is for example atmospheric (at_pherie屻, = 9 200837456 P55950136TWC2 23180-2twf.doc/n (He), neon (Ne), argon (Ar), antimony (Kr) , Xenon (Xe), Hydrogen (3⁄4), Carbon dioxide (c〇2), etc. Since the gas to be filled is a low to moderate vacuum, the average electron free path is large enough for the electron to directly hit the firefly under the electric field. The material of the optical layer 306 is used to emit the desired light. The embodiment of Fig. 3 can be implemented in another form, as shown in Fig. 4. Fig. 4 is a schematic cross-sectional view of a light source device in accordance with an embodiment of the present invention. Referring to FIG. 4, the light source device includes a cathode structure 3〇2b, a positive structure 304b, a phosphor layer 306, a secondary electron generating layer 3〇8, a low pressure gas layer 310, a side wall structure 312 and a reflective layer. 314. The light source device shown in Fig. 4 is similar to the light source device shown in Fig. 3. The difference is that the light source device shown in Fig. 4 further includes a reflective layer 314' which is disposed in the well structure 304b and Between the glory layers 306. Further, the cathode structure 302b is a light transmitting structure. The material is, for example, indium tin oxide, fluorine-doped tin oxide or other transparent conductive oxide layer material. The anode structure 304b is a material that is transparent or opaque. When the gas 320 is generated by a gas discharge mechanism and a positive ion Ο When the 322 impacts the secondary electron generating layer 308 to generate additional secondary electrons 324 to strike the phosphor layer 306, the generated light 330 is reflected by the reflective layer 314 through the cathode structure 302b, which is also referred to as a reflective light source. In addition, in the reflective light source device, the anode structure 3〇4b is a transparent conductive material evaporated on the glass, and the reflective layer 314 can be a highly reflective metal or a highly reflective metal evaporated high reflective optical film, which can be improved. Reflectivity and increase brightness and luminous efficiency. 200837456 P5595013 6TWC2 23180-2twf.doc/n Second Embodiment FIG. 5 is a schematic view showing a light source device according to an embodiment of the present invention. Referring to FIG. 5, the money device comprises a cathode structure shirt, an anode structure 404a, a phosphor layer 406, and a discharge layer. The material of the sputum layer and the low pressure gas cathode structure is a metal layer or a transparent conductive material on the surface substrate. The anode structure 404a is located at the cathode structure 4〇2&

i) The anode structure is released as a light-transmitting structure. The material is, for example, indium tin oxide, fluorine-doped tin oxide or other transparent conductive oxide layer (4). The cathode structure & and the anode structure 404a may, for example, comprise, for example, a substrate and an electrode layer on the substrate. The actual structure of the cathode structure 402a and the anode structure 4A4a may vary depending on the actual design. J: 匕 is generally understood by those skilled in the art and will not be described here. The phosphor layer 406 is disposed between the cathode structure 4〇2a and the anode structure 4, for example, and is disposed, for example, on the anode structure 4〇4a. The discharge layer 408 is disposed on the cathode structure 4〇2a. The material of the discharge layer 408 may be a metal, a carbon nanotube, a nanocarbon wall, a nano carbon material, a columnar zinc oxide (ZnO), an oxide film or the like. The low-pressure gas layer 410 is disposed between the cathode structure 4〇2a and the anode structure 404a, and is filled with a low-pressure gas, for example, in the range of 8χ1 (Γι~1χ1〇_3 _, which, for example, makes the electron mean free path greater than about 5 mm In one embodiment, the light source device further includes a side wall structure 412 that isolates the cathode structure 402a from the anode structure 404a while also enclosing the low pressure gas layer 410 to fill the low pressure gas. 11 200837456 P55950136TWC2 23180-2twf .doc/n 曰 The present invention utilizes a thin gas to easily conduct electrons, uniformly generate enough electrons 420, and utilizes a krypton voltage to allow the free electrons 42 to impinge on the phosphor layer to produce the desired light. In the example, since the discharge layer 408 is a dischargeable material, the operating voltage can be lowered.

In the present embodiment, the anode structure 404a is a light transmitting structure made of, for example, indium tin oxide, fluorine-doped tin oxide or other transparent conductive oxide layer material. Therefore, when the electrons 420 strike the phosphor layer 4〇6, the generated light 43〇 passes through the anode structure 4〇4a, which is also referred to as a penetrating device. In addition, in the transmissive light source device, the cathode structure strip can be better than the anti-heterogeneous metal, so as to increase the brightness of the disc and note that the 'filled gas is used to induce the cathode. The use of the gas 'There is no special demand for the gas, sigh each " or mixed gas. The gases used such as the atmosphere, helium, neon, argon, carbon dioxide, etc.. Because the filling gas is medium ~ low direct air , ^ = the average electron free path material is large, so that the electrons are on the material of the electric field ^ slamming the glory layer to emit the desired light. The embodiment of Fig. 5 can be implemented in another form, as shown by the 6 Light (four) according to the present invention - the structure and function of the light source device shown in Fig. 6 is: the structure of the source device and Wei, so no longer the domain _ f = not the light source device of Figure 6 and the light source of Figure 5 / 1 Figure 6, _ arranged in the anode structure coffee and the 槪 = = in the 'discharge layer' Figure 5 embodiment can be implemented in another form, as shown in Figure 7. Figure 12 200837456 P55950136TWC2 23180-2twf.doc/n 7 Illustrated is a cross-sectional view of a light source device according to an embodiment of the invention The structure and function of the light source device shown in FIG. 7 are similar to the structure and function of the light source device shown in FIG. 5, and therefore will not be repeatedly described. Referring to FIG. 7, the light source device of FIG. 7 is different from the light source device of FIG. The discharge layer 408 is disposed on the cathode structure 4〇2a and between the anode structure 404a and the phosphor layer 406. The embodiment of Fig. 5 can be implemented in another form, as shown in Fig. 8. A schematic diagram of a light source device according to an embodiment of the present invention. Referring to FIG. 8, the light source device includes a cathode structure 4, an anode structure 404b, a phosphor layer 406, a discharge layer 408, and a low pressure gas layer 410. a side wall structure 412 and a reflective layer 414. The light source device shown in Fig. 8 is similar to the light source device shown in Fig. 5. The difference is that the light source device shown in Fig. 8 further includes a reflective layer 414. Further, the cathode structure 4〇2b is a light transmitting structure, and the material thereof is, for example, indium tin oxide, fluorine-doped tin oxide or other transparent conductive emulsified layer material. The anode structure 4〇4b is Light transmissive or impervious When the electron 420 strikes the phosphor layer 4〇6, the generated light 43〇 is reflected by the reflective layer 414 over the cathode structure 402b, which is also referred to as a reflective light source device. The anode structure 4〇4b is preferably a highly reflective metal which improves reflectivity and increases brightness and luminous efficiency. The embodiment of Fig. 8 can be implemented in another form, as shown in Fig. 9. Illustrated is a cross-sectional schematic of a light source device according to an embodiment of the present invention. 13 200837456 P55950136TWC2 23180-2twf.doc/n. The structure and function of the non-light source device of FIG. 9 is similar to the structure of the light source device shown in FIG. Function, so the description is not repeated. Referring to FIG. 9, the light source device of FIG. 9 is different from the light source device of FIG. 8 in that the discharge layer 408 is disposed between the reflective layer 414 and the phosphor layer 406. The embodiment of Figure 8 can be implemented in another form, as shown in Figure 1A. Fig. 10 is a cross-sectional view showing a light source device according to an embodiment of the present invention. In the present embodiment, the structure and function of the light source device shown in Fig. 10 are similar to those of the light source device shown in Fig. 8, and therefore will not be repeatedly described. Referring to Fig. 10, the light source device of Fig. 10 is different from the light source device of Fig. 8 in that the 'discharge layer 408 is disposed on the cathode structure 402b and between the reflective layer 414 and the phosphor layer 406, respectively. "Some of the foregoing embodiments have a light-emitting surface that is single-sided if there is a mechanism to cooperate with light reflection. However, if a mechanism of light reflection is not employed, when the cathode structure and the anode structure are selected, for example, by a transparent conductive material, Both are light-transmitting characteristics, which can achieve double-sided light output. Although the light is weak, the light-emitting surface is double-sided. If a reflective layer is added to the outer surface of any light-emitting surface, For example, the surface of the transparent substrate is a transparent electrode structure, and the other surface is provided with a reflective layer such as a vapor-deposited metal reflective layer. In one step, the backlight module can be fabricated as a display using the above-mentioned light source device. FIG. 11 illustrates a backlight module in accordance with an embodiment of the present invention. Referring to FIG. 5, the backlight module of the embodiment of the present invention is a light-emitting panel 1100 constructed on the light-emitting device described above, and operates. Voltage 14 200837456 P55950136TWC2 23180-2twf.doc/n is provided by power control ϋ 11G2. In addition, for example, M reheating mechanism 1104 ' is set on the back of the illuminated panel The light-emitting device of the present invention is capable of being processed into a large-area planar light source, and therefore, the structure and operation of the backlighting module are relatively increased, and the luminous efficiency is increased. In addition, according to the needs of the backlight module, the increase can be increased. Bright Film Enhancement (BEF, Brightness Enhance Film) or Reflective Enhancement

u One (10) EF, Duai BEF to increase the directivity and brightness of light. FIG. 12 is a schematic structural view of another backlight module according to an embodiment of the invention. Based on the structure of the image ’, for example, a brightening optical film 1106 is provided on the light-emitting surface of the light-emitting panel 11A. The brightening optical film 11〇6 includes, for example, BEF or dbef. In addition, other optical films may be added if necessary, for example, a diffusion module is added between the brightness enhancing optical film 1106 and the light emitting panel 1100 to make the light intensity uniform. The light emitting module of the above embodiment is formed by a single light emitting panel. However, the light-emitting module may also be composed of a plurality of light-emitting panel units. FIG. 13 is a schematic diagram showing the structure of another backlight module according to an embodiment of the invention. Referring to Fig. 13, the light-emitting module hoi is composed of, for example, a plurality of light-emitting panel units 1100a, 1100b, 1100c, ..., which are further constituted, for example, in an array manner. The respective light-emitting panel units lla, HOOb, ll〇〇c can be controlled, for example, by different power supply controllers 〇2a, n〇2b, ll2c, . In this embodiment, since the light source is composed of a plurality of light-emitting panel units, the original luminous intensity may be uneven, so that the use of the diffusion module 11〇8 makes the light source mix uniformly. Then, the brightening optical film 1106 is used to cause the diffused light to be emitted as far as possible to the light-emitting surface, thereby improving the lightness. 15 200837456 P55950136TWC2 23180-2twf.doc/n In addition, in order to increase the luminous intensity, for example, a plurality of light-emitting panel units may be stacked. In addition, when used as a backlight module, in order to have a single light-emitting surface, for example, a reflective surface can be formed on the outermost surface, for example, by using the electrode itself or by adding a reflective layer to achieve a reflection effect. As described above, the light source device proposed in the first embodiment of the present invention has a secondary electron generating layer. Since free positive ions in the gas impinge on the cathode, additional secondary electrons are generated when the positive ions strike the secondary electron generating layer on the cathode structure to increase the luminous efficiency. The light source device of the second embodiment of the present invention can be configured with a discharge layer to reduce the operating voltage on both the cathode structure and the anode structure. In the third embodiment of the present invention, the backlight module is constructed by using the above embodiments to improve the performance of the backlight module. The light source device of the invention can be applied to a liquid crystal display (LCD) backlight module. This light source device can increase the luminous intensity and the uniformity of light emission' and further omits the cost of a light guide plate and a diffusion sheet required for the use of a cold cathode fluorescent lamp (CCFL). The light source device of the present invention combines the advantages of both plasma and field emission sources. The light source device of the present invention utilizes a rare gas to induce uniform emission electron characteristics of the cathode, and easily extracts electrons from the cathode structure, which can avoid the disadvantage that the field emission source cathode is difficult to manufacture. The light source device of the present invention is aimed at the current use of a thin LCD backlight module for personal computers, home televisions, car televisions or other related purposes. 'This type of field emission illuminating device has energy saving, short response time, and It has the advantages of luminous efficiency, easy manufacturing, and environmental protection (excluding fruit). 16 200837456 P55950136TWC2 23180-2twf.doc/n Compared with the conventional field emission light source device, the light source device of the present invention only needs to be a planar metal or conductive film structure because of the cathode structure, and no special treatment or any material is required. The structure is relatively simple. Furthermore, the present invention does not require high vacuum packaging, simplifies the production process and facilitates large area production. The cathode metal structure/highly reflective material in the transmissive structure and the anode metal structure/highly reflective material in the reflective structure will increase reflectivity and increase brightness and luminous efficiency. The wavelength of light emitted by the present invention depends on the type of phosphor powder, and light sources or backlights of different wavelength ranges can be designed for different purposes such as illumination or display. The invention can design a flat or curved backlight module. In the present invention, the reflective reflective layer can avoid the light guiding phenomenon, thereby increasing the brightness and luminous efficiency. If the circuit design is matched with the grounding, the accumulation in the fluorescent powder can be eliminated. The present invention has been disclosed in the above preferred embodiments. However, it is not intended to limit the invention, and any one of ordinary skill in the art can make a few changes. Retouching, ^ Therefore, the scope of protection of the present invention is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing the mechanism of a conventional planar light source device. 2 is a cross-sectional view showing the mechanism of another conventional planar light source device. 3 is a cross-sectional view of a light source device according to an embodiment of the present invention. 17200837456 P55950136TWC2 23180-2twf.doc/n is a cross-sectional view schematically showing a cross-sectional view schematically showing a cross-sectional view 4 showing a cross-sectional view according to the present invention. The light source assembly of the embodiment. FIG. 5 is a diagram of a light source assembly according to an embodiment of the invention. Figure 6 is a diagram of a light source assembly in accordance with an embodiment of the present invention. FIG. 7 is a diagram of a light source according to an embodiment of the invention. FIG.

Figure 8 is a cross-sectional view of a light source device in accordance with an embodiment of the present invention. Figure 9 is a cross-sectional view of a light source device in accordance with an embodiment of the present invention. Figure 10 is a cross-sectional view showing a light source device in accordance with an embodiment of the present invention. FIG. 11 is a schematic structural view of a backlight module according to an embodiment of the invention. 12-13 are schematic diagrams showing the structure of another backlight module according to an embodiment of the invention. [Main component symbol description] 100, 102: Electrode structure 104: Gas 106: Power supply l〇8a, l〇8b, 108c: Glory layer 18 200837456 P55950136TWC2 23180-2twf.doc/n 110: Electron 112: Visible light 120: Glass substrate 122: Cathode structure layer 124: Conical conductor 126: Gate layer 128: Anode structure layer 130. Phosphor layer r, i 132: Electrons 302a, 302b: Cathode structures 304a, 304b: Anode structure 306: Fluorescent layer 308 Secondary electron generating layer 310: low pressure gas layer 312: side wall structure 314: reflective layer G 320: electron 322: positive ion 324: secondary electron 330: light 402a, 402b · cathode structure 404a, 404b: anode structure 406 : luminescent layer 408 : discharge layer 19 200837456 P55950136TWC2 23180-2 twf.doc / n 410 : low-pressure gas layer 412 · side wall structure 414: reflective layer 420: electron 430: light 1100, 110a, 110b, 110c: light-emitting panel 1101 : Light-emitting module 1102, 1102a, 1102b, 1102c: power supply controller 1104: heat dissipation mechanism 1106: brightening optical film 1108: diffusion module L) 20

Claims (1)

200837456 P55950136TWC2 23180-2twf.doc/n X. Application for patents: 1. A light source device comprising: a cathode structure having a light transmitting property as a light exiting surface; a pole structure located opposite the heteropolar structure; Light-reflecting characteristics; a phosphor layer between the rnrn pole structure and the pole structure; and a pi Γ low-dust two-gas layer filled in the cathode structure and the anode structure of the b'~can gas layer have induced uniform emission of the cathode The role of electrons, Γ + seal the low Wei body layer has a large electron mean free path, allowing the scorpion to directly hit the county layer under the operation - to produce the desired light. A light source device according to claim 1, wherein the secondary electron generating layer comprises a material which is easy to generate electrons. 3. The light source device of claim 2, wherein the electron-producing material comprises magnesium oxide (MgO), cerium oxide (Tb2〇3), cerium oxide (La2〇3) or cerium oxide (Ce02). . The light source device of the invention of claim 2, wherein the gas pressure of the low pressure gas layer is in the range of SxHT1~1 (T3 torr.), as described in item 1 of the patent application scope. The light source device further includes a side structure for separating the cathode structure from the anode structure, and constituting a sealed space to form the low-pressure gas layer. 6. The light source device according to claim 1, A light source device according to claim 1, wherein the anode structure comprises an electrode layer and a light reflecting layer. 21 200837456 P55950136TWC2 23180- 2twf.doc/n 8. The light source device according to claim 1 is a metal material, _ having a morphing property / 9. A light source device comprising: a cathode structure having a light transmitting property; ΓΓΐί The structure of the recording and the gambling is opposite, with tree light characteristics; the discharge layer is located at least in the structure of the anode structure a phosphor layer located between the cathode structure and the anode structure; a low-grade gas layer having a cathode to uniformly emit electrons, wherein the low-pressure gas layer has a The large electron mean free path allows the electron to directly strike the phosphor layer at an operating voltage. The light source device of claim 9, wherein the discharge layer is located on the cathode structure. The light source device of claim 9, wherein the discharge layer is located on the anode structure. u where 12. The light source device of claim 9, wherein the discharge layer is on the cathode structure and the anode structure. The light source device of claim 9, wherein the discharge layer comprises a material that is easily discharged. The light source device of claim 13, wherein the material that is easily discharged includes metal. The light source device of claim 13, wherein the easily dischargeable material comprises a carbon nanotube, a nanocarbon wall or a nano carbon material. The light source device of claim 13, wherein the easily dischargeable material comprises a columnar zinc oxide (ZnO) or zinc oxide film. The light source device of claim 9, wherein the pressure of the low pressure gas layer is in the range of 8ΧΚΓ1 to nr3 torr. 18. The light source device of claim 9, further comprising a side wall structure for separating the cathode structure from the anode structure and forming a closed space to constitute the low pressure gas layer. The light source device of claim 9, further comprising a reflective layer between the phosphor layer and the anode structure. (Restoring this item) 20. A backlight device comprising: at least one power controller providing at least one operating voltage; and a lighting unit comprising at least one lighting panel, the lighting panel being controlled by the operating voltage, wherein the lighting The panel comprises: a cathode structure; an anode structure located opposite the cathode structure; a phosphor layer between the cathode structure and the anode structure; and a low pressure gas layer filled in the cathode structure and the anode structure Between the low-pressure gas layer has the function of inducing the cathode to uniformly emit electrons, wherein the low-pressure gas layer has a large electron mean free path, so that the electron can directly strike the phosphor layer at an operating voltage. 21. The backlight device of claim 2, further comprising a heat dissipating mechanism disposed on a back surface of the light emitting panel. 22. The backlight device of claim 2, further comprising 23 200837456 P55950136TWC2 23180-2twf.doc/n comprising a brightening optical film disposed on the light-emitting panel 23 as claimed in claim 20 The backlight device of the present invention, wherein the light emitting panel further comprises a secondary electron generating layer located on the cathode structure. The backlight device of claim 2, wherein the light emitting panel further comprises a discharge layer on at least one of the cathode structure and the anode structure. The backlight device of claim 2, wherein the light emitting unit comprises a plurality of the light emitting panels. 26. The backlight device of claim 2, further comprising a brightness enhancing optical film disposed on one side of the light emitting surface of the light emitting panel. The backlight device of claim 20, further comprising a diffusion module between the light-emitting panel and the brightness enhancing optical film. 28. The backlight device of claim 2, wherein the cathode structure has a light transmittance and the other has light reflectivity. The backlight device of claim 20, wherein the illuminating panel is composed of a plurality of illuminating panels, respectively, which are specifically referred to as a illuminating surface. The backlight device of claim 2, wherein the light-emitting panel comprises a plurality of light-emitting panels. twenty four