A method for manufacturing film pasted white light digital tube and film pasted white light digital tube
A manufacturing method and technology of digital tubes, applied in the field of digital tubes, can solve problems such as waste of fluorescent powder and uneven luminous color, and achieve the effect of saving fluorescent powder and uniform color
Inactive Publication Date: 2013-07-24
MLS
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Problems solved by technology
[0003] The purpose of the present invention is to provide a white light digital tube and its preparation method, so as to overcome the disadvantages of serious waste of phosphor powder and uneven luminous color in the traditional process.
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[0018] A method for manufacturing a film-attached white light digital tube provided by the present invention mainly includes the following steps:
[0019] Step 1, fix the blue LED chip on the PCB board, carry out solid crystal and wire bonding, and package it with the digital tube 1, its state is as follows figure 1 As shown, the window 11 on the nixie tube 1 is used to transmit light to the LED chip;
[0020] Step 2, which can be subdivided into:
[0021] Step 2.1, prepare a piece whose shape is as figure 2 The shown transparent film is used as the mask 2, and its size is the same as or slightly smaller than the front shape of the digital tube 1;
[0022] Step 2.2, cover the corresponding position on the mask 2 with a baffle with the same shape as the window 11 of the nixie tube 1, and the baffle adopts a metal such as a steel mesh structure;
[0023] Step 2.3, brush black oil on the side covered with the baffle, and leave the window area 21 corresponding to the shape of ...
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A method for manufacturing film pasted white light digital tube is characterized by comprising the following steps: a first step of fixing a blue light LED (light-emitting diode) chip on a PCB (printing circuit board) board for die bonding, wire welding and packaging; a second step of manufacturing a mask, wherein the size of the mask is identical to or slightly less than the profile of the digital tube, preparing a steel net baffle corresponding to a window of the digital tube, covering the baffle on the corresponding position of the mask and brushing black oil on the baffle; a third step of evenly painting an epoxy resin oil on the window, wherein the epoxy resin contains fluorescent powder; and a fourth step of pasting the mask on the digital tube after the epoxy resin is dry. By the process method of the invention, fluorescent powders are greatly saved; only the transparent window of the mask is painted with the fluorescent power, so that more than 90% of fluorescent powders used in traditional process are saved; the fluorescent powers are painted on the mask evenly, so that during the use of the following procedures, the fluorescent powders are not deposited; and white lights with even colour can be emitted.
Description
technical field [0001] The invention relates to a digital tube, in particular to a film-attached white light digital tube and a manufacturing method thereof. Background technique [0002] With the improvement of people's living standards, people's requirements for household appliances are also getting higher and higher. On home appliances, LED display panels for displaying information are also more and more used, among which the white light digital tube is the most common application. In the traditional white light digital tube, the light-emitting elements all use blue LED chips. The blue light chips are packaged on the PCB board through die-bonding welding, and are combined with yellow phosphor powder to achieve the effect of emitting white light. The phosphor powder is fixed in a Phosphor powder is added to the glue, and then packaged together in the digital tube, that is, the phosphor powder is directly added to the glue, and then packaged. Since the phosphor is directly ...
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IPC IPC(8): H01L33/50G09G3/14
Inventor 刘天明
Owner MLS