Flat light source utilizing porous silicon ballistic electron emission
A planar light source and electron emission technology, which is applied in the field of planar light source, using porous silicon ballistic electron emission to excite gas atoms, can solve the problems of restricting the luminous efficiency of the light source, reducing the transmittance of visible light, and inability to completely transform visible light. Achieve the effect of improving luminous efficiency and brightness, simple production and high production efficiency
Inactive Publication Date: 2011-06-01
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 planar light source includes a front substrate 1 and a rear substrate 2 which are made of glass material and are separated by a certain distance. A reflective layer 14 is arranged under the phosphor layer 7, and there are sealing frames around the front and rear substrates 1 and 2 to seal the space between the front and rear substrates 1 and 2, with a certain interval between the front and rear substrates 1 and 2. Some support strips 13 parallel to each other are set, and bottom electrode 8, porous silicon membrane 9 and top electrode 10 are prepared on one side of support strip 13, and bottom electrode 8, porous silicon membrane 9 and top electrode 10 constitute the ballistic trajectory that can be produced. The porous silicon cathode for electron emission prepares the anode 11 on the other side, the porous silicon cathode and the anode 11 are respectively on the opposite two sides of the adjacent support bar 13, and the two sealing ...
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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 which uses porous silicon ballistic electron emission to excite gas atoms. Background technique [0002] With the global energy shortage and the intensification of environmental pollution, governments of all countries attach great importance to energy conservation and environmental protection. In the field of lighting, the 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 of mercury-containing fluorescent lamps, high luminous efficiency (up to 60-80lm / w), and complete specifications and models, 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 source te...
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IPC IPC(8): H01J63/06H01J61/04
Inventor 胡文波张鹏郑宇
Owner XI AN JIAOTONG UNIV