JPH0545773U - Light emitting diode display - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a good display without color unevenness even when the light emitting diode display device is viewed from all directions. A light emitting diode chip of a two-color light emitting diode is tilted in a predetermined direction, and the light emitting diode chips of the light emitting diodes adjacent to each other in the horizontal direction and the vertical direction are arranged alternately.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light emitting diode display device in which light emitting diodes provided with light emitting diode chips of two colors emitting different colors are arranged in a matrix.

[0002]

[Prior Art]

 Conventionally, a light emitting diode display device in which a plurality of light emitting diodes of two different colors are arranged is arranged with light emitting diode chips (red circles are red and white circles are green) that emit red and green, respectively, as shown in FIG. , D are arranged in a matrix on the substrate and the upper and lower light emitting diodes D, D, ..., D are arranged side by side in the left and right direction. , D, a light-shielding plate B is projected forward from the light emitting diodes D, D, ..., D to emit light of a single color, an intermediate color and a mixed color.

[0003]

[Problems to be solved by the device]

 By the way, since the light emitting diode chips of the two-color light emitting diodes D, D, ..., D are arranged at positions deviated from the central axes of the lenses of the light emitting diodes D, D ,. The light emitting directions of are opposite to each other as shown in FIG. Therefore, when a plurality of light emitting diodes D, D, ..., D are arranged in a matrix as shown in FIG. 3, when viewed from the right side of the drawing, red light emission looks good, whereas green light emission looks good. Was difficult to see, and when viewed from the opposite direction, the red luminescence was difficult to see. On the other hand, when the light emitting diode chips are arranged in the vertical direction and the light emitting diodes D, D, ..., D are arranged in a matrix, there is color unevenness seen from the vertical direction and the light is above the light shielding plate. The luminescent color located was hidden behind the light shield and was difficult to see. Further, when the light emitting diodes D, D, ..., D are arranged so that the light emitting diode chips are arranged in the horizontal direction or the vertical direction, the lead terminals of the adjacent light emitting diodes D, D ,. There is a risk that the fixing solder will come into contact and short-circuit, and it is difficult to create a wiring pattern on the board. As a result, the intervals between the light emitting diodes D, D, ..., D are widened, and the brightness of the light emitting diode display device can be increased. There wasn't. The present invention has been made to address such problems, and an object of the present invention is to provide a light emitting diode display device that does not have color unevenness when viewed from any direction.

[0004]

[Means for solving the problem]

 In order to solve such a problem, the present invention mounts two color light emitting diode chips having different light emitting colors on the mounting surface of the cathode lead terminal, and In a light emitting diode display device in which each anode lead terminal provided on the outside and the light emitting diode in which the light emitting diode chip is wire-bonded with a metal wire are arranged in a matrix, a direction in which the light emitting diode chips are arranged is inclined at a predetermined angle to emit light. In this configuration, the light emitting diode chips of the light emitting diodes adjacent to each other in the right and left directions and the upper and lower directions in which the diodes are arranged are alternately arranged.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a side view of the light emitting diode. In the light emitting diode 1, light emitting diode chips 2a and 2b (black circles are red, white circles are green) having different emission colors are mounted on the mounting surface of the same cathode lead terminal 3. At the same time, the two anode lead terminals 4a and 4b provided outside the cathode lead terminal 3 in the direction in which the light emitting diode chips 2a and 2b are arranged and the respective light emitting diode chips 2a and 2b are wire-bonded by the metal wires 5 and 5. By applying a voltage between the terminals 3, 4a and 4b, a monochromatic color, an intermediate color and a mixed color are emitted.

FIG. 2 shows a layout diagram in which a plurality of light emitting diodes 1, 1, ..., 1 are arranged in a matrix, and each light emitting diode 1, 1 ,. The light emitting diodes 1, 1, ..., 1 are arranged so as to be inclined by 45 °, and the light emitting colors of the light emitting diodes 1, 1 ,. Further, light-shielding plates 6, 6, ..., 6 are arranged in the left-right direction between the light emitting diodes 1, 1 ,. Therefore, in the light emitting diode display device, the light emitting directions of the respective light emitting diode chips 2a and 2b are alternately inverted even when viewed from the left and right direction and the up and down direction, so that a good display can be obtained without deviation of the light emission color. Further, since the light emitting diode chips 2a, 2b of the light emitting diodes 1, 1, ..., 1 are inclined by 45 °, the anode lead terminals 4a, 4b of the adjacent light emitting diodes 1, 1 ,. The fixed solder contact is avoided and the wiring pattern on the board can be easily created. In this way, the light emitting diode display device in which the light emitting diodes 1, 1, ..., 1 are arranged does not show different emission colors even when viewed from all angles, and the intermediate color and the mixed color are displayed well.

[0007]

[Effect of the device]

 The present invention is configured as described above, and two light emitting diode chips having different emission colors are mounted on the mounting surface of the cathode lead terminal, and each light emitting diode chip is provided outside the cathode lead terminal in the direction in which the light emitting diode chips are arranged. In a light-emitting diode display device in which light-emitting diodes, in which the anode lead terminal and the light-emitting diode chip are wire-bonded with a metal wire, are arranged in a matrix, the light-emitting diode chips are arranged side by side by tilting the light-emitting diode chips at a predetermined angle. Further, by alternately changing the light emitting color arrangement of the light emitting diode chips of the light emitting diodes adjacent to each other in the vertical direction, good display can be obtained without color unevenness when viewed from the left and right and the vertical direction. Also, by tilting the direction in which the light-emitting diode chips are lined up by a certain angle, it is possible to avoid contact with the solder that fixes the terminals of the adjacent light-emitting diodes to the substrate, and to easily create a wiring pattern on the substrate, thus integrating the light-emitting diode High brightness display can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a light emitting diode in a light emitting diode display device according to an embodiment of the present invention.

FIG. 2 is a layout view of light emitting diodes in the display device.

FIG. 3 is a layout view of light emitting diodes in a conventional light emitting diode display device.

[Explanation of symbols]

 1, 1, ..., 1 Light emitting diode 2a, 2b Light emitting diode chip 3 Cathode lead terminal 4a, 4b Anode lead terminal 5,5 Metal wire

Claims (1)

[Scope of utility model registration request] 1. A light emitting diode chip of two colors having different emission colors is mounted on a mounting surface of a cathode lead terminal, and each anode lead terminal provided outside the cathode lead terminal in the direction in which the light emitting diode chips are arranged and the above In a light emitting diode display device in which light emitting diodes, which are formed by wire-bonding light emitting diode chips with a metal wire, are arranged in a matrix, the light emitting diodes are adjacent to each other in a horizontal direction and an up and down direction in which the light emitting diode chips are arranged at a predetermined angle. 2. A light-emitting diode display device, wherein the light-emitting diode chips of FIG.