JP2010219208A - Led array - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clearly indicate placement locations of various components placed in an LED array without deteriorating the reflective efficiency of light irradiated from an LED which is a light source, in the LED array used for the light source for irradiating a scan target manuscript or the light source for eliminating static electricity. <P>SOLUTION: The LED array includes: a substrate; a plurality of white LEDs which are mounted to the substrate; white resist films which cover the substrate and reflect light irradiated from the LEDs; and silk printed on the white resist films and reflect the light irradiated from the LEDs. The silk indicates identification information with a character string and is provided adjacent to one another so as to correspond to the placement locations in the LED, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to an LED (Light Emitting) used as a light source for irradiating a document to be scanned or a light source for removing static electricity in an image forming unit.
Diode: A light emitting diode) array.

A substrate in which a substrate is coated with a resist film and components such as a plurality of LEDs and a plurality of resistors are mounted on the substrate is referred to as an LED array. In an image reading unit in an image forming apparatus, an LED array is used as a light source for irradiating a document to be scanned. The substrate of the LED array is a rectangle having a long side and a short side, and the long side has a width equivalent to the maximum reading width. A plurality of LEDs are arranged linearly at predetermined intervals in the longitudinal direction of the substrate.

Light is emitted from the LED placed on the substrate toward the original to be scanned, and the light reflected from the original is sequentially reflected by a plurality of reflecting mirrors and guided to the condenser lens. It is known that the reflected light guided to the condenser lens is imaged on a CCD sensor, converted into an electrical signal by the CCD sensor, and output. Therefore, it is effective to make the surface of the substrate in the LED array on the side on which the LED is mounted have a color excellent in light reflection. For this reason, the surface of the substrate is coated with a white resist film as a color excellent in light reflection. (Patent Document 1).

Further, in an image forming unit in the image forming apparatus, an LED is used as a light source of a static elimination lamp for removing static electricity. The static elimination lamp lowers the potential of the surface of the photosensitive drum after the transfer and makes the potential distribution uniform (Patent Document 2). In general, a substrate on which an LED for a static elimination lamp is mounted is a rectangle having a long side and a short side, and the long side has a width equivalent to that of a photosensitive drum to be static electricity removed. A plurality of LEDs are arranged linearly at predetermined intervals in the longitudinal direction of the substrate. Light is applied to the charged drum from the LED mounted on the LED array, and the static electricity charged on the surface of the drum is removed.

Furthermore, various components such as a resistor or a transistor as well as the LED are placed on the substrate. Therefore, in order to clearly indicate the placement location of these components, a circuit symbol composed of a classification symbol and an identification number indicating a symbol on the circuit diagram of the component in the vicinity of the mounting position of each component, and a mounting An external shape mark indicating the position is displayed by silk printing (Patent Document 3).

JP 2001-77981 A JP-A-6-276377 JP 2002-344098 A

When the substrate is coated with a white resist film in an LED array that is used as a light source for irradiating a document to be scanned or a light source for removing static electricity, the reflectance of the light radiated from the LED is increased in the resist film, and light is efficiently Is reflected. However, not only LEDs but also various components such as resistors and transistors are placed on the LED array. SUMMARY OF THE INVENTION An object of the present invention is to provide an LED array that can clearly indicate the placement location of various components placed on the LED array without lowering the reflection efficiency.

An LED array used as a light source for irradiating a scan target document according to the present invention includes a substrate, a plurality of white LEDs mounted on the substrate, a white LED that covers the substrate and reflects light emitted from the LED. A resist film and a silk printed in white on the white resist film and reflecting the light emitted from the LED, and the silk shows identification information as a character string and mounts the LED. It is characterized by being provided adjacent to each other corresponding to the installation location.

The LED array used as the static electricity removing light source of the present invention includes a substrate, a plurality of white LEDs mounted on the substrate, a white resist film that covers the substrate and reflects light emitted from the LED And a silk printed in white on the white resist film and reflecting the light emitted from the LED, the silk showing identification information in a character string, and the placement place of the LED It is characterized by being provided adjacent to each other.

In the LED array of the present invention, it has a plurality of resistors having different resistance values, and the silk is provided adjacent to each other so as to correspond to the placement location of the resistor, while indicating identification information as a character string. It is characterized by that.

In the LED array of the present invention, the plurality of resistors are characterized in that a surface to which the irradiation light of the LED hits is white.

In the LED array of the present invention, the color of the resist film is higher in brightness than the silk color, and the color of the resist film and the color of the silk are distinguishable.

According to the LED array used as the light source for irradiating the document to be scanned according to the present invention, the LED is a white LED having a high luminous efficiency. The substrate is coated with a white resist film, and white printed silk is provided on the resist film. Therefore, the light emitted from the white LED is reflected on the white resist film and the white silk, rather than the LED array in which the light emitted from the non-white LED is reflected on the non-white resist film and the non-white silk. The LED array improves the reflectance of light in the resist film and silk, and can reflect light efficiently. As a result, the necessary amount of light can be obtained with a small amount of current, so that the LED serving as the light source requires a small amount of electricity consumption.

Further, the silk is a character string that is provided adjacent to each other so as to correspond to the place where the LED is placed, and indicates identification information of the LED. Therefore, the silk has an effect that it is possible to clearly indicate a placement place for placing the LED while suppressing a decrease in reflectance.

According to the LED array used as the static electricity removal light source of the present invention, similarly to the LED array used as the scan target document irradiation light source, white LEDs are used, and the substrate is coated with a white resist film. Silk printed in white is provided on the resist film. Therefore, the same effect as that of the LED array used as the light source for irradiating the scan target document is obtained. That is, the reflectance of light emitted from the LED can be improved. As a result, the LED serving as the light source saves power.

Further, the silk is a character string that is provided adjacent to each other so as to correspond to the place where the LED is placed, and indicates identification information of the LED. Therefore, the silk has an effect that it is possible to clearly indicate a placement place for placing the LED while suppressing a decrease in reflectance.

According to the LED array of the present invention, even when a resistor is placed in the same manner as the placement of the LED, the silk is provided adjacent to each other so as to correspond to the placement location of the resistor. Is a character string indicating Therefore, the silk has an effect that it is possible to clearly indicate a placement place for placing the resistor while suppressing a decrease in reflectance. Thereby, it becomes easy to place a plurality of resistors having different resistance values.

According to the LED array of the present invention, since the surface of the resistor that is irradiated with the light emitted from the LED is white, the reflectance of the light is improved and the light can be efficiently reflected. As a result, the required amount of light can be obtained with a small amount of current by improving the reflectance, so that the LED serving as the light source requires a small amount of electricity consumption.

According to the LED array of the present invention, as the color of the resist film, white which shows high brightness with respect to the silk color is used. Thereby, the assembling worker can surely recognize the silk character instructed where to place the component when assembling. The area of the resist film is larger than the area of silk. Therefore, the light can be reflected more efficiently by setting the color of the resist film having a large irradiation area of the irradiation light emitted from the LED to a white color having a lightness higher than that of the silk color. As a result, the LED serving as the light source requires a small amount of electricity consumption.

1 is a diagram illustrating an embodiment of a digital multifunction peripheral according to the present invention. FIG. 3 is a diagram illustrating details of an image reading unit of a digital multifunction peripheral. FIG. 3 is a diagram illustrating details of an image forming unit of the digital multifunction peripheral. It is an enlarged view which shows the detail of the LED array in FIG. 2 or FIG.

Hereinafter, preferred embodiments of the present invention will be described. Note that the embodiments described below are preferable specific examples in the description, and thus various limitations are made. However, the present invention is not limited to these unless specifically stated to limit the present invention. Absent.

FIG. 1 is a diagram showing an embodiment of a digital multifunction machine 1 according to the present invention. The digital multifunction peripheral 1 includes an image reading unit 2, a paper feeding unit 4, an image forming unit 5, a discharge unit 6, and a document placing unit 7. The image reading unit 2 includes a reading unit 3.

The reading unit 3 provided in the image reading unit 2 moves in the sub-scanning direction, and reads a document placed on the document placing unit 7. The recording paper stored in the paper supply unit 4 is conveyed to the image forming unit 5, and the image data of the original read by the reading unit 3 is printed on the recording paper by the image forming unit 5. The recording paper on which the image data is printed is discharged to the discharge unit 6.

FIG. 2 is a diagram illustrating details of the image reading unit of the digital multifunction peripheral. The image reading unit 2 includes a reading unit 3, a document placing unit 7, and a storage unit 12. The reading unit 3 includes an LED array 8 including LEDs as light sources, a reflection mirror 9, a condenser lens 10, and a CCD sensor 11.

A document is placed on the document placement unit 7. The reading unit 3 moves in the sub-scanning direction and reads the entire document. In the reading unit 3, light is emitted from an LED array 8 used as a light source for irradiating a scan target document toward a document placed on the document placement unit 7. The irradiated light hits the document and is reflected. The reflected light reflected from the document is sequentially reflected by a plurality of reflecting mirrors 9 and guided to the condenser lens 10. Then, the reflected light guided to the condenser lens 10 is imaged on the CCD sensor 11, converted into an electrical signal by the CCD sensor 11, and output. The electrical signal output from the CCD sensor 11 is stored in the storage unit 12. Image data that is an electrical signal stored in the storage unit 12 is printed on a recording sheet.

FIG. 3 is a diagram illustrating details of the image forming unit of the digital multifunction peripheral. The image forming unit 5 includes a photosensitive drum 13, a charging unit 14, an exposure unit 15, a developing unit 16, a transfer unit 17, a static eliminating unit 18, an LED array 8 used as a static electricity removing light source, And a cleaning unit 19.

In the image forming unit 5, the surface of the photosensitive drum 13 is charged by the charging unit 14 in order to make the charge on the surface of the photosensitive drum 13 uniform. The surface of the uniformly charged photoreceptor drum 13 is irradiated with light from the exposure unit 15 to form an electrostatic latent image. The toner supplied from the developing unit 16 adheres to the electrostatic latent image, and the electrostatic latent image is visualized. The transfer unit 17 transfers the toner on the surface of the photosensitive drum 13 onto the recording paper.

However, some toner remains on the surface of the photosensitive drum 13 without being transferred to the recording paper. In order to remove the residual toner, in order to make the charge remaining on the surface of the photosensitive drum 13 as zero as possible, light is irradiated from the LED array 8 used as a static electricity removing light source toward the photosensitive drum 13. Is done. The irradiated light strikes the photosensitive drum 13, and the potential of the surface of the photosensitive drum 13 drops, and the adhesion force of the toner that adheres to the photosensitive drum 13 is weakened. The residual toner whose adhesion is weakened is removed by the cleaning unit 19.

FIG. 4 is an enlarged view showing details of the LED array 8 in FIG. 2 or FIG. The LED array 8 includes a substrate 20, a white resist film 21, a white LED 22, a resistor 23, and silk 24 printed in white. The LED array 8 can be used as a scanning target original irradiation light source or a static electricity removal light source.

The substrate 20 is a rectangle having a long side and a short side. The long side of the substrate 20 has a maximum reading width or a width equivalent to that of the photosensitive drum 13 to be subjected to static electricity removal. The plurality of LEDs 22 are linearly arranged at predetermined intervals in the longitudinal direction of the substrate 20. By arranging the LEDs 22 in a straight line, uniform light can be supplied. A plurality of resistors 23 having different resistance values are disposed on the substrate 20. In FIG. 4, the resistor 23 is arranged at a position different from the straight line on which the LEDs 22 are arranged. However, the resistor 23 may be disposed between the LED 22 and the LED 22.

The substrate 20 is covered with a white resist film 21 only on the side where the LED 22 and the resistor 23 are placed. By making the color of the resist film 21 covering the substrate 20 white, the reflectance of light emitted from the LED 22 can be improved as compared with the case where the color of the resist film 21 is other than white. However, the place where the LED 22 and the resistor 23 are placed is not covered with the resist film 21.

White silk 24 is printed on the resist film 21. The silk 24 plays a role of clearly indicating the place where each component is placed. The silk 24 corresponds to the placement place of each component and is provided adjacent to each component.

As shown in FIG. 4, the place where the LED 22 is placed is indicated by the character strings “LED” and “numbers” in Roman letters. The number in the string increases with the number of parts. Specifically, a character string indicating the place where the LED 22 is placed is printed on the silk 24, such as “LED1, LED2, LED3, LED4, LED5, LED6. In addition, the resistor 23 indicates the place of installation with a character string “R” and “number” in Roman letters. The number in the string increases with the number of parts. Specifically, a character string indicating the placement location by the resistor 23 is printed on the silk 24 as “R1, R2,...”.

Thereby, the place where LED22 and resistance 23 are laid can be instructed reliably. Therefore, the assembly worker can place the component at the component placement location indicated by the silk 24. In particular, since there are a plurality of resistors 23 having different resistance values, the resistors 23 can be easily arranged by designating the arrangement location by the silk 24.

However, the LED 22 and the resistor 23 are not necessarily placed on the substrate 20. Various components such as a transistor may be placed in addition to the LED 22 and the resistor 23. For example, when a transistor is placed on the substrate 20, the place where the transistor is placed is indicated by “Q”, “Q2. The number in the character string increases with the number of parts.

The transistor is disposed on the substrate 20 in the same manner as the LED 22 and the resistor 23. Further, the transistor may be disposed at a position different from the straight line where the LED 22 is disposed similarly to the resistor 23, or may be disposed between the LED 22 and the LED 22.

As described above, the resist film 21 is provided on the entire surface of the substrate 20 except for the place where the components are placed. The silk 24 is a character string that is provided adjacent to each other so as to correspond to the placement location of each component and indicates identification information of each component. With such a configuration, the area of the resist film 21 in the substrate 20 is larger than the area of the silk 24. Therefore, the light can be reflected more efficiently by setting the color of the resist film 21 having a large irradiation area of the irradiation light emitted from the LED 22 to a white color with a brightness higher than that of the silk 24. As a result, the LED serving as the light source requires a small amount of electricity consumption.

Moreover, the color of the resist film 21 is white that exhibits high brightness with respect to the color of the silk 24. Thereby, the resist film 21 and the silk 24 can be identified. Therefore, the assembling worker can surely recognize the color of the silk 24 with respect to the color of the resist film 21 during the assembling work. Therefore, the LED 22 and the resistor 23 can be reliably placed on the substrate 20 as instructed by the silk 24 printed in white.

Similar to the resist film 21, the color of the silk 24 is also white, so that the reflectance of light emitted from the LED 22 can be improved as compared with the case where the silk 24 is a color other than white. Accordingly, when the resistor 23 is placed on the substrate 20, the resistor 23 turns the surface of the LED 22 irradiated with the light to white. By making the surface of the resistor 23 white, it is possible to suppress a decrease in reflectance. Therefore, the reflectance of light emitted from the LED 22 can be increased, and light can be efficiently reflected.

As described above, in the LED array 8 of the present invention, the light emitted from the white LED 22 is reflected on the white resist film 21 and the white silk 24. Thereby, the reflectance of the light in the resist film 21 and the silk 24 is improved, and the light can be efficiently reflected. Accordingly, since a necessary amount of light can be obtained with a small amount of current, the LED 22 serving as a light source requires a small amount of electricity consumption.

Further, the silk 24 is provided adjacently so as to correspond to the place where the LED 22 is placed, and is a character string indicating identification information of the LED 22. Further, the resist 21 film is white, which has a higher brightness than the silk 24 color. Therefore, the silk 24 has an effect that it is possible to clearly indicate the placement place for placing the LED 22.

DESCRIPTION OF SYMBOLS 1 Digital multifunction device 2 Image reading part 3 Reading unit 4 Paper feed part 5 Image forming part 6 Ejection part 7 Document placing part 8 LED array 9 Reflecting mirror 10 Condensing lens 11 CCD sensor 12 Storage part 13 Photosensitive drum 14 Charging unit 15 Exposure unit 16 Development unit 17 Transfer unit 18 Static elimination unit 19 Cleaning unit 20 Substrate 21 Resist film 22 LED
23 Resistance 24 Silk

Claims (5)

A substrate,
A plurality of white LEDs mounted on the substrate;
A white resist film that covers the substrate and reflects light emitted from the LED;
Silk that is printed in white on the white resist film and reflects light emitted from the LED;
Comprising
The silk is an LED array that is used as a light source for irradiating a scan target document, characterized in that identification information is indicated by a character string and is provided adjacent to each other so as to correspond to a place where the LED is placed. A substrate,
A plurality of white LEDs mounted on the substrate;
A white resist film that covers the substrate and reflects light emitted from the LED;
Silk that is printed in white on the white resist film and reflects light emitted from the LED;
Comprising
The silk is an LED array used as a static electricity removing light source, wherein identification information is indicated by a character string, and is provided adjacent to each other so as to correspond to a place where the LED is placed. A plurality of resistors having different resistance values are provided,
3. The LED array according to claim 1, wherein the silk is provided adjacent to each other so as to correspond to a place where the resistor is placed while indicating identification information by a character string. 4. 4. The LED array according to claim 3, wherein the plurality of resistors have a white surface which is irradiated with light emitted from the LED. 5. 5. The LED array according to claim 1, wherein the color of the resist film is higher in brightness than the color of the silk, and the color of the resist film and the color of the silk are distinguishable.