JP3878166B2 - Electronic equipment with a printed circuit board that improves the brightness of LEDs - Google Patents

Description

The present invention relates to an electronic apparatus arranged printed circuit board to improve the brightness of the LED, in particular, to a mechanism part relief portion and the character portion except board mounting part portion and part display character portion in order to improve the brightness of LED The present invention relates to an electronic device in which a printed circuit board subjected to white silk printing is arranged.

  2. Description of the Related Art Conventionally, a method of installing a light source that emits visible light from the viewpoints of improving visibility of switches, displaying various information, preventing erroneous operations, and the like has been used in operation units of electric devices and electronic devices. That is, the light notifies the user of the position of the switch of the device, the operating state of the device, and the like. As a light source that emits visible light, a light-emitting diode is widely used for reasons such as low power consumption. However, since the luminous intensity of the light emitting diode is not so large, various measures have been taken to efficiently use the emitted light and enhance the visibility of the light emitting state. As one of the measures, there is a method of painting a printed circuit board on which a light emitting diode is installed in white.

  In general, the surface of the printed circuit board is often left in a resist-treated state or an insulating plate. In this state, the surface of the printed circuit board is usually colored such as green. A light source such as a light emitting diode is mounted on the printed circuit board, and the printed circuit board is installed and used in an electric device or an electronic device. In this case, the light emitting diode is mounted out of the light emitted from the light emitting diode. The light incident on the surface of the printed circuit board is absorbed by the surface of the printed circuit board, and the usage efficiency of the light emitted from the light emitting diode is reduced accordingly. In order to improve this and increase the use efficiency of light emitted from a light emitting diode, it has been conventionally performed to paint a printed circuit board in white. In other words, by painting the printed circuit board in white, it is intended to increase the reflection efficiency of the light incident on the surface of the printed circuit board on which the light emitting diode is mounted out of the light emitted from the light emitting diode, thereby increasing the light usage efficiency. is there.

  On the other hand, the printed circuit board is used with various components mounted on it, and on the surface of the printed circuit board, there are symbol marks for instructing the type and position of the components to be mounted on the printed circuit board. Letters and numbers are printed. These mounted component instruction displays may be printed in a plurality of colors.

  There are JP-A-2000-36203, JP-A-10-129345, JP-A-9-55143, and JP-A-7-219463 as conventional techniques relating to such a printed circuit board.

  The prior art disclosed in Japanese Patent Application Laid-Open No. 2000-36203 relates to a signal lamp having a plurality of light emitting diodes as light sources, and is a part that can be seen from the outside through at least a transparent plate on a printed circuit board on which the light emitting diodes are soldered In addition, by coating the entire surface with white or a bright color similar to white, among the light emitted from the light emitting diode, the light leaked to the back side of the light emitting diode (that is, the direction opposite to the direction that the signal lamp illuminates) is reflected, It improves visibility. The portion that can be seen from the outside through the transparent plate is a range that can be seen from the front of the signal lamp through the transparent plate while viewing the inside where the light emitting diodes and the like are disposed.

  The prior art disclosed in Japanese Patent Application Laid-Open No. 10-129345 relates to a vehicle interior lighting device used for vehicles such as trucks, buses, one-boxes, etc., and a circuit pattern of a printed circuit board on which components of an inverter circuit are arranged A fluorescent lamp socket is fixed to the surface side, and the circuit pattern surface side (that is, the side on which the fluorescent lamp is mounted) of the printed circuit board is entirely painted white. As a result, the printed circuit board coated with white has a function of reflecting light incident on the surface of the printed circuit board out of the irradiation light of the fluorescent lamp to the inside of the vehicle, thereby improving the illuminance in the vehicle interior.

  The prior art disclosed in Japanese Patent Laid-Open No. 9-55143 relates to a backlight illumination structure of a key operation unit of a handset unit such as a cellular phone radio device, and a light emitting diode as a light source of backlight illumination is soldered. All the surface portions other than the switch contact and the mounted light emitting diode portion of the printed circuit board are printed in white, thereby improving the light reflection efficiency and enhancing the illumination effect.

  The prior art disclosed in Japanese Patent Laid-Open No. 7-219463 relates to a lighting device for a display panel unit such as a video deck, and a light reflecting member is placed on a printed circuit board on which a light emitting diode as a lighting light source is mounted. By printing, the amount of illumination light of the display panel unit is increased.

JP 2000-36203 A JP-A-10-129345 JP-A-9-55143 JP-A-7-219463

  In the above conventional example, as a method for effectively using light emitted from a light emitting source such as a light emitting diode, the surface of the printed circuit board is whitened by whitening the surface of the printed circuit board. Although techniques for reflecting incident light have been disclosed, these have basically been whitened over the entire surface of the printed circuit board. On the other hand, as described above, the printed circuit board is used with various components mounted thereon, and the surface of the printed circuit board is used to indicate the type and position of the components mounted on the printed circuit board. The symbol mark and letters / numbers are printed.

  Hereinafter, a symbol mark, a character, a number, or the like for instructing the type / position of a component to be printed on the surface of the printed circuit board will be referred to as a component instruction display.

  A printed circuit board for an electronic device equipped with a light emitting source such as a light emitting diode according to the present invention is used by being incorporated in a device such as a video deck, for example. , Fitting, screwing, bonding, etc. Therefore, a contact portion for attachment is always generated between the printed circuit board and a device such as a video deck. Therefore, if convex portions or the like that are not intended in design occur at these contact portions on the printed circuit board, a problem occurs when the printed circuit board is attached to a device such as a video deck.

  A light emitting source such as a light emitting diode mounted on a printed circuit board for electronic equipment according to the present invention is installed for improving the visibility of a switch, displaying various information, preventing misoperation, and the printed circuit board, for example, It will be used for the switch part of equipment such as a video deck. Therefore, the printed circuit board may have a part that causes contact with a mechanism part having a movable part such as a switch, or a part where a space must be secured in order not to prevent the movement of the mechanism part. Therefore, convex portions that are not designed in the design are generated in a portion of the printed circuit board that comes into contact with a mechanical part of a device such as a video deck or in a space that must be secured in order not to prevent movement of the mechanical part. As a result, the operation of the mechanism parts is hindered.

  Therefore, the contact part for attachment with another apparatus and the part which must be ensured for the normal operation of the mechanism parts of the other apparatus are displayed as a warning on the printed circuit board surface by printing or the like. Usually, in these displays, a portion to be secured in order to avoid contact or the like is indicated by hatched diagonal lines. Thereby, it is prevented that the foreign material which is not designed on the said part is mounted in this part.

  Hereinafter, a contact part for mounting with other equipment and a part that must be secured for the normal operation of the mechanical parts of the other equipment are referred to as mechanism part escape parts.

  In order to realize the above-described configuration in which the surface of the printed circuit board is whitened, a component instruction display is printed on the surface of the printed circuit board, and further, the mechanism part escape portion is displayed on the surface of the printed circuit board. For example, first, the entire surface of the printed circuit board is printed with white silk, and then overcoated on the entire surface of the printed circuit board. In order to ensure visibility, a method of silk printing with a dark color to some extent) is conceivable. However, in this case, the number of steps becomes plural, and silk printing for the second and subsequent layers is performed in color, so that the light reflection efficiency on the surface of the printed circuit board recedes.

  The present invention reflects light incident on the surface of a printed circuit board out of light emitted from a light emitting source such as a light emitting diode, and is performed on the surface of the printed circuit board in order to effectively use the light emitted from the light emitting source such as a light emitting diode. The printing is performed by printing the coloring and the instruction display of the parts etc. on the printed circuit board, and further displaying the display of the mechanism part escape portion on the printed circuit board in the same color of white or a bright color similar to white. It is possible to perform the printing process on the substrate once and to increase the light reflection efficiency on the surface of the printed circuit board as much as possible.

In order to improve the visibility of light emitted from a light emitting source such as a light emitting diode and a light emitting source such as a light emitting diode, a light emitting source such as a light emitting diode is mounted on a printed circuit board that operates a device operation switch of an electronic device. the light emitting diode on the surface light-emitting source of the printed circuit board on the side having such the an instruction display portion such as a mounting part, operating the equipment switch parts escape portion displayed corresponding to the projecting portion of the button frame constituting line drawing portion, constitutes the solid printing portion, a periphery of the mounting parts and the like instruction display serving symbol, letter or digit a instruction display mounting components onto the printed circuit board to be printed on said printed circuit board a portion excluding the portion, and the front KiSo Chakubuhin such instruction display, silk printing and the part relief portion displaying the line drawing portion, and said solid printing portion in the same color And an electronic device characterized by comprising a printed circuit board.

  In order to increase the light reflection efficiency on the surface of the printed circuit board, it is effective to use white or a bright color similar to white for silk printing.

In the above-described configuration, when the part other than the peripheral part of the mounting component instruction display printed on the printed circuit board is silk-printed in the same color with the mounting component instruction display, for example, when white is used for silk printing In other words, since white characters cannot be identified with white characters on a white background, peripheral portions such as letters and numbers are not colored. Accordingly, the peripheral portion of the character or the like retains the ground color on the surface of the printed circuit board (for example, green when resist processing is performed), and the character or the like is printed in white thereon. Range of the peripheral portion of the mounting parts such as instruction display is appropriately determined in consideration of visibility of the mounting components such as the instruction display. If there is no problem in the visibility as the instruction display, the light reflection efficiency on the surface of the printed circuit board can be increased by narrowing the range of the peripheral portion (the range of the background color of the surface of the printed circuit board) as much as possible. .

In the above configuration , when the line drawing portion of the part relief portion display is silk-printed , for example, when white is used for silk printing, it is not possible to determine this by displaying white on a white background. using the color of the land of the surface of the substrate is that the display of the path over Tsu escape portion. Viewing Pa over tool relief portion of this also, taking into account the visibility of the display, the range of printing with bright color similar to white or white (i.e. line drawing) as wide as possible, the land of the printed circuit board surface By narrowing the color range, the light reflection efficiency of the printed circuit board surface can be increased.

According to the present invention, in order to effectively use the light emitted from the light emitting source such as the light emitting diode by reflecting the light incident on the surface of the printed circuit board out of the light emitted from the light emitting source such as the light emitting diode. a solid print portion is a colored performed, an instruction display mounted components such as, for printing a line drawing of the path over Tsu relief portion displayed by the same color, it is possible to dispense the printing process with respect to the printed circuit board in a single Therefore, it is possible to reduce the manufacturing time and cost, and to provide an electronic device that can be seen at a low cost and has a good switch portion. Further, even when the base area is small, the luminance of the LED can be improved while considering the arrangement of other parts and the mechanism portion.

According to the present invention, the indication of the mounted parts and the indication of the parts escape portion are printed on the surface of the printed circuit board, so that it is versatile, and these indications are also printed in a color with good reflection efficiency. The light reflection efficiency of the substrate surface is good.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following embodiment is one form when the present invention is embodied, and is not intended to limit the present invention within the scope thereof.

  FIG. 1 shows a top view of an embodiment of a printed circuit board for electronic equipment used in the present invention. The printed circuit board 11 and the printed circuit board 12 are printed circuit boards having light emitting diodes. A white part in FIG. 1 represents the color of the ground on the surface of the printed circuit board, and a black part (solid print portion 13) and a line drawing indicate a silk-printed part. Therefore, for example, if the ground of the printed circuit board remains in a resist-processed state, the white portion in FIG. 1 is actually a color such as green, and the black portion or black line drawing in FIG. If silk printing is done in white, it is actually white. The hatched portion in FIG. 1 is printed on the printed circuit board as an indication of the mechanism part escape portion, and does not indicate the cross section of the component.

  The switch instruction mark 14, the switch instruction display 15, the light emitting diode instruction mark 16, the light emitting diode instruction display 17 and the like in FIG. 1 are parts etc. instruction displays for instructing the type and position of the parts to be mounted on the printed circuit board. The parts escape portion display 19 indicates a contact portion for attachment to another device, and the parts escape portion display 18 indicates a portion that must be secured for normal operation of the mechanism parts of the other device. In the work process, attention is urged so that foreign matters are not put on this part by mistake.

  FIG. 3 is a front view of a device operation switch portion of a video deck which is one embodiment of a device including a printed circuit board for electronic devices according to the present invention, and FIG. 2 is taken along the line AA in FIG. It is sectional drawing of the apparatus operation switch part of the said video deck. The printed circuit board 11 of FIG. 2 is printed with white silk on the parts indication indications such as the switch indication mark 14 and the light emitting diode indication mark 16, the part escape portion indication 18 corresponding to the protruding portion of the button frame 24, and the solid print portion 13. After that, components such as the light emitting diode 23 and the switch 22 are mounted and mounted in the video deck.

  When the button unit 21 is pushed down, the switch 22 operates, and the light emitting diode 23 emits light. The button part 21 has translucency and appears to be lit when the light emitting diode 23 emits light. At this time, the light of the light emitting diode 23 is reflected by the solid printed portion 13 or the like, and the lighting of the button portion 21 is made clearer.

  The button frame 24 operates together with the button part 21 when the button part 21 is pushed down. The parts escape portion display 18 is printed as a warning on the printed circuit board so as not to interfere with the operation of the button frame 24 and thus does not interfere with the operation of the button unit 21. It reminds you not to put anything in the place where you want to go.

The following white silk printing inks were used in the examples of the present invention.
For single-sided board Manufacturer: TAMURA (JAPAN)
Product No .: USI-21W
TYPE: UV curing For double-sided substrates Manufacturer: STATIC TEXHINLOGY (TAIWAN)
Product number: OCC-M211W
TYPE: Thermosetting

Plan view of the base used in the present invention AA line sectional view of FIG. The front view of the operation panel part of the video deck of the Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Printed circuit board 12 Printed circuit board 13 Solid printing part 14 Switch instruction | indication mark 15 Switch instruction | indication display 16 Light emitting diode instruction | indication mark 17 Light emitting diode instruction | indication display 18 Parts escape part display 19 Parts escape part display 21 Button part 22 Switch 23 Light emitting diode 24 Button frame

Claims (1)

Emitting source and the switch part is mounted such as light emitting diodes on the printed circuit board to operate the equipment operating switch of an electronic device, in order to improve the visibility of the light emitting source, such as a light emitting diode emits the light emitting diode On the surface of the printed circuit board on the side having the light emitting source, etc., an instruction display portion such as the mounted component, and a line drawing portion of a part escape portion display corresponding to a protruding portion of a button frame constituting the device operation switch, constitute a solid print portion, and excluding the peripheral portion of the mounting parts and the like instruction display serving symbol, letter or digit a instruction display mounting components onto the printed circuit board to be printed on said printed circuit board and partial, and before KiSo Chakubuhin such instruction display, and the part the relief portion display line drawing part of, was and said solid printed portion and silk printed in the same color pudding An electronic apparatus comprising the board.

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