Flat light source utilizing porous silicon ballistic electron emission
A flat light source and electron emission technology, applied in the field of flat light sources, using porous silicon ballistic electron emission to excite gas atoms, can solve the problems of restricting the luminous efficiency of light sources, reducing the transmittance of visible light, and unable to completely convert visible light, etc. To achieve the effect of simple production, improved luminous efficiency and brightness, and high production efficiency
Inactive Publication Date: 2010-03-03
XI AN JIAOTONG UNIV
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Problems solved by technology
Since the porous silicon cathode needs to emit electrons, phosphor powder and reflective layer cannot be coated on its surface. Phosphor powder can only be coated on the front substrate of the planar light source, and the thickness should not be too thick, otherwise it will reduce the transmission of visible light. rate, which leads to the inability to effectively utilize the VUV and visible light emitted to the rear substrate, and the VUV emitted to the front substrate 1 cannot be completely converted into visible light due to the thinner phosphor powder. These factors restrict the further improvement of the luminous efficiency of the light source. improve
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[0023] according to figure 1 As shown, the plane light source includes a front substrate 1 and a rear substrate 2 made of glass material and separated by a certain distance. There is a reflective layer 14 under the phosphor layer 7, and a sealing frame is arranged around the front and rear substrates 1 and 2 to seal the space between the front and rear substrates 1 and 2. There is a certain interval between the front and rear substrates 1 and 2. Arrange some support bars 13 parallel to each other, and prepare a bottom electrode 8, a porous silicon film 9 and a top electrode 10 on one side of the support bar 13. The bottom electrode 8, the porous silicon film 9 and the top electrode 10 constitute a ballistic trajectory that can be generated. Electron-emitting porous silicon cathode, the anode 11 is prepared on the other side, the two opposite sides of the adjacent support bar 13 are respectively the porous silicon cathode and the anode 11, and the two sealing edges 12 parallel ...
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The invention discloses a flat light source utilizing porous silicon ballistic electron emission. Fluorescence powder layers are made both on a front substrate and a rear substrate of the flat light source; a plurality of mutually parallel support bars are arranged between the front substrate and the rear substrate at a certain interval; bottom electrodes, porous silicon films and top electrodes or anodes are prepared on two side faces of each support bar and the inner side faces of two sides of a sealing frame; the bottom electrodes, the porous silicon films and the top electrodes form a porous silicon cathode capable of emitting the ballistic electron; and inert gas is filled in an inner space surrounded by the front substrate and the rear substrate. When proper DC voltage is exerted tothe electrode of the flat light source, the porous silicon films can emit electrodes to a gas space, the electrons are collided with inert gas atom to be excited to generate vacuum ultraviolet ray (VUV) so as to excite fluorescence powder to emit light.
Description
technical field [0001] The invention belongs to the field of light source manufacturing, and relates to a plane light source, in particular to a plane light source that utilizes porous silicon ballistic electron emission to excite gas atoms. Background technique [0002] With the global energy shortage and environmental pollution intensifying, governments around the world attach great importance to energy conservation and environmental protection. In the field of lighting, the research and development of green light sources with high efficiency, energy saving and no environmental pollution has become an important direction for the development of light source technology. Due to the mature technology, high luminous efficiency (up to 60-80lm / w), and complete specifications and models of mercury-containing fluorescent lamps, they are still widely used as lighting sources and LCD backlights. In the past ten years, although the development and application of mercury-free light sou...
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IPC IPC(8): H01J63/06H01J61/04
Inventor 胡文波张鹏郑宇
Owner XI AN JIAOTONG UNIV