JPH0934385A - LED display - Google Patents

Abstract

(57) [Abstract] [Purpose] Even when looking at the display device at a low cost from a short distance, it is possible to satisfactorily recognize the display contents such as characters and figures, and sunlight is inserted into the LED display device. Even in such a case, it is an object to provide an LED display device capable of recognizing display contents such as characters and figures. [Structure] A colored LED formed on a lens formed by resin molding so as to surround an LED chip is mounted on a printed circuit board whose entire mounting surface is light-colored such as white so as to form a specific graphic pattern or character pattern. Implemented. Alternatively, a plurality of LEDs, each of which has a transparent lens formed by resin molding so as to surround the LED chip, are mounted on a printed circuit board so as to form a specific graphic pattern or character pattern, and a printed circuit board on which the LED is mounted is mounted. The mounting portion was made a light color such as white, and the other portions were made a dark color such as black.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has a plurality of LEDs arranged therein.
The present invention relates to an LED display device that displays graphics or characters by causing each LED to emit light.

[0002]

2. Description of the Related Art Conventionally, a plurality of LEDs are arranged on a printed circuit board with a distance between the LEDs adjacent to a graphic pattern or a character pattern, and each LED is caused to emit light to form a set of points (light). The characters and figures have been displayed with. However, in the conventional LED display device, when the display device is viewed from a distance, each point (light) appears to be continuously connected, and the display contents such as characters and figures can be recognized well. However, when viewing the display device from a short distance, each point (light) seemed to be discontinuously separated, and the display contents such as characters and figures could not be recognized well. . for that reason,
As disclosed in Japanese Patent Laid-Open No. 6-3624, an optical low-pass filter is arranged in the display optical path of a display device in which a plurality of LEDs are arranged in a matrix or in a character shape with a distance kept between adjacent LEDs, and the LED emits light. By "blurring", the display contents such as characters and figures that seemed to separate each point (light) discontinuously appear as if each point (light) was connected continuously, and from a short distance Even when looking at the display device, the display contents such as characters and figures can be recognized well. In addition, L is printed on the printed circuit board with white printing on the entire mounting surface.
A transparent LED is mounted on a lens formed by resin molding so as to surround the ED chip so as to form a specific graphic pattern or character pattern.
By utilizing the fact that the light emitted from D is irregularly reflected by the printing of white, it appears that each point (light) is continuously connected, and even when the display device is viewed from a short distance,
The display contents such as characters and figures can be recognized well, and the contrast between when the LED emits light and when the LED does not emit light is improved.

[0003]

As in the conventional display device as described above, an optical low-pass filter is arranged in the display optical path to diffuse the light emission of the LED so that each point (light) is continuously emitted. A special optical low-pass filter is required for a display device that looks good and allows the display contents such as characters and figures to be recognized well even when the display device is viewed from a short distance. Because of this, the cost is quite high. In addition, a transparent LED is mounted on a printed circuit board, which is printed in white on the entire mounting surface, so as to surround the LED chip and is formed by resin molding so as to form a specific graphic pattern or character pattern. The display device is
At night or in dark surroundings, the dots (lights) appear to be connected continuously, and even when you look at the display device from a short distance, you can recognize the displayed contents such as characters and figures well. However, in a place where sunlight is inserted into the display device in the daytime or where the surroundings are bright, the visibility of the light emission of the LED is reduced, so that the display contents such as characters and figures cannot be recognized well. According to the present invention, it is possible to satisfactorily recognize the display contents such as characters and figures even when the display device is viewed from a short distance at low cost, and L
An object of the present invention is to provide an LED display device capable of recognizing display contents such as characters and figures even when sunlight is inserted into the ED display device.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] An LED having a lens formed by resin molding so as to surround an LED chip and colored is formed on the entire mounting surface so as to form a specific graphic pattern or character pattern. It was mounted on a light-colored printed circuit board. At this time, when the printed circuit board has a dark color such as black, a light color such as white is printed to mount the LED, and at the time of this printing, it corresponds to the electronic parts mounted on the printed circuit board in addition to the LED. Die-print the symbol mark and reference number at the position you want.

A plurality of LEDs, each of which has a transparent lens formed by resin molding so as to surround the LED chip, are mounted on a printed board so as to form a specific graphic pattern or character pattern, and the printed board on which the LED is mounted is mounted. The mounting portion of was colored light such as white, and the other portion was colored dark such as black. At this time, when the printed circuit board is a dark color such as black, the figure pattern or the character pattern portion is printed in a light color such as white.
Besides, a symbol mark and a reference number are simultaneously printed at positions corresponding to electronic components mounted on the same printed circuit board. Also, when the printed circuit board is a light color such as white,
The figure pattern or character pattern part shall be die-printed in a dark color such as black, and at the time of this printing, the symbol mark and reference number shall be simultaneously removed at the position corresponding to the electronic components mounted on the same printed circuit board in addition to the LED. Pattern printing.

In this invention, the lens formed by resin molding so as to surround the LED chip is colored L
The ED is mounted on a printed circuit board whose entire mounting surface is light-colored such as white so as to form a specific graphic pattern or character pattern, and the lens formed by resin molding so as to surround the LED chip is transparent. Are mounted on a printed circuit board so as to form a specific graphic pattern or character pattern, the printed circuit board mounting surface of the part on which the LED is mounted is light-colored such as white, and the other part is dark such as black. By using a color, the light emission of the LEDs is diffused on the printed circuit board by placing the mounting surface of the printed circuit board on a light color such as white without disposing an optical low-pass filter in the display optical path unlike conventional display devices. Then, each point (light) seems to be connected continuously, and when you look at the display device from a short distance, characters and figures Cost compared with the conventional display device can be satisfactorily recognize indicates contents can be achieved. In addition, by attaching a symbol mark, a reference number to the corresponding position of the electronic component on the mounting surface of the printed circuit board or printing by die-cutting, or printing by die-cutting,
Costs can be reduced when producing printed circuit boards.

Even when sunlight is inserted into the display device during the daytime, a specific graphic pattern or character pattern is formed by an LED using a lens that is colored on a printed circuit board whose entire mounting surface is light colored such as white. LED with a transparent lens is mounted on a light color part such as white of a printed circuit board in which a specific figure pattern or character pattern part is light color such as white and the other is dark color such as black. The visibility of the light emission of
Even if the ED does not emit light, the display contents such as characters and figures can be recognized due to the difference in color.

Entire mounting surface of printed circuit board or LED
By making the specific graphic pattern or character pattern portion formed by the light color such as white, it is possible to obtain a contrast such that the display contents of the character, the graphic, etc. are highlighted.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a first embodiment of the present invention. FIG. 2 is a front view of the first embodiment of the present invention. FIG.
[Fig. 3] is a front view of Working Example 2 of the present invention.

As a first embodiment, a light emitting diode (LED)
An example in which a colored LED lens formed by resin molding so as to surround a chip is mounted on a printed circuit board whose entire mounting surface is light-colored such as white so as to form a specific graphic pattern or character pattern Will be described. Reference numeral 1 is a dark green printed board made of epoxy resin and glass cloth on which white silk printing 2 is applied on the entire mounting surface, and component insertion holes 3 are formed in accordance with the wiring. 4 is an LED in which a lens formed by resin molding so as to surround the LED chip is colored red or the like, and 5 is L
A current limiting resistor that limits the current of the ED4. LED
4. The current limiting resistor 5 is fixed to the printed circuit board 1 by passing the electrode terminal through the component insertion hole 3 and soldering it on the back surface of the printed circuit board 1. Reference numeral 6 is a symbol mark showing the arrangement of parts and polarity of the parts, and 7 is a reference number showing the kind of parts and the serial number of the parts. The symbol mark 6 and the reference number 7 are created by die-cut printing, and are applied by white silk printing on the entire mounting surface of the printed circuit board.

Next, as a second embodiment, a light emitting diode (LE
D) A plurality of LEDs having a transparent lens formed by resin molding so as to surround the chip are mounted on a printed circuit board so as to form a specific graphic pattern or character pattern, and mounting of the printed circuit board on which the LED is mounted. An embodiment will be described in which a part is made a light color such as white and the other part is made a dark color such as black. Reference numeral 8 is a dark green printed board made of epoxy resin and glass cloth, and a specific graphic pattern or character pattern portion is subjected to white silk printing 9. Like the first embodiment, the component insertion hole 10 is formed in the printed circuit board 8 according to the wiring. Reference numeral 11 denotes an LED having a transparent lens formed by resin molding so as to surround the LED chip. The LED 11, a current limiting resistor (not shown) that limits the current of the LED 11 is fixed to the printed board 8 by soldering on the back surface of the printed board 8 through the electrode terminals through the component insertion hole 10. Similar to the first embodiment, reference numerals 12 and 13 are symbol marks indicating the component arrangement and the polarity of the component, and reference numbers indicating the component type and the component reference number. The symbol mark 12 and the reference number 13 are created by printing, and are applied by white silk printing on the mounting surface of the printed board. The LED 11 is mounted on the part where the white silk printing 9 is applied.

In both the first and second embodiments, the light emitting color of the LEDs 4 and 11 forming a specific graphic pattern or character pattern is monochromatic, and in particular red is used.

[0012]

According to the present invention, a colored LED is formed on a lens formed of a resin mold so as to surround the LED chip, and the entire mounting surface is white or the like so as to form a specific graphic pattern or character pattern. A plurality of LEDs mounted on a light-colored printed circuit board and having a transparent lens formed by resin molding so as to surround the LED chip are formed on the printed circuit board so as to form a specific graphic pattern or character pattern. Implemented, L
To arrange an optical low-pass filter in the display optical path like a conventional display device by making the printed circuit board mounting surface of the part on which the ED is mounted a light color such as white and the other part a dark color such as black. Instead, by making the mounting surface of the printed circuit board a light color such as white, the light emission of the LED is diffused on the printed circuit board, and it seems that each point (light) is connected continuously, and the display device can be viewed from a short distance. Even when viewed, the display contents such as characters and figures can be recognized well, and the cost can be reduced as compared with the conventional display device.
Further, the symbol mark and the reference number are printed on the mounting surface of the printed circuit board or printed by die-cutting at the corresponding positions of the electronic parts to perform printing or die-cutting, thereby reducing the cost at the time of producing the printed board.

Even when sunlight is inserted into the display device during the daytime, a specific graphic pattern or character pattern is formed by an LED using a lens that is colored on a printed circuit board whose entire mounting surface is light-colored such as white. LED with a transparent lens is mounted on a light color part such as white of a printed circuit board in which a specific figure pattern or character pattern part is light color such as white and the other is dark color such as black. The visibility of the light emission of
Even if the ED does not emit light, the display contents such as characters and figures can be recognized due to the difference in color.

Entire mounting surface of printed circuit board or LED
By making the specific graphic pattern or character pattern portion formed by the light color such as white, it is possible to obtain a contrast such that the display contents of the character, the graphic, etc. are highlighted.

[Brief description of drawings]

FIG. 1 is a perspective view of a first practical use example of the present invention.

FIG. 2 is a front view of a practical use example 1 of the present invention.

FIG. 3 is a front view of Working Example 2 of the present invention.

[Explanation of symbols]

 1,8 Printed circuit board 2,9 White silk printing 3,10 Component insertion hole 4,11 LED 5, Current limiting resistance 6,12 Symbol mark 7,13 Reference number

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideaki Maruta 1825 Amamiya, Aramiya, Sarahima City, Nagano MK Seiko Co., Ltd.

Claims (5)

[Claims] 1. A print in which an LED, which is formed by resin molding so as to surround an LED chip, is colored, and the entire mounting surface is light-colored such as white so as to form a specific graphic pattern or character pattern. An LED display device characterized by being mounted on a substrate. 2. A plurality of LEDs, each of which has a transparent lens formed by resin molding so as to surround an LED chip, are mounted on a printed circuit board so as to form a specific graphic pattern or character pattern. An LED display device characterized in that a portion where the LED is mounted is made a light color such as white and the other portions are made a dark color such as black. 3. The LED display device according to claim 1,
It is assumed that the LEDs are mounted by printing the light color such as white on the dark color printed circuit board such as black.
In addition to D, the LED display device is characterized in that a symbol mark and a reference number are punched and printed at positions corresponding to electronic components mounted on the same printed circuit board. 4. The LED display device according to claim 2, wherein
It is assumed that the graphic pattern or character pattern part is printed in a light color such as white on a dark-colored printed circuit board such as black. At the time of this printing, a symbol mark is placed at a position corresponding to the electronic components mounted on the printed circuit board in addition to the LED , An LED display device characterized by simultaneously printing a reference number. 5. The LED display device according to claim 2,
Die-printing of a graphic pattern or character pattern part in a dark color such as black shall be performed on a light-colored printed circuit board such as white, and at the time of this printing, at a position corresponding to the electronic components mounted on the printed circuit board in addition to the LED. An LED display device characterized in that a symbol mark and a reference number are printed at the same time by die-cutting.