JPH0219828Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a light emitting diode display device that has a high display density and is effective when the display device is symmetrical.

B. Prior art As shown in Fig. 1, a conventional display using dots uses a light emitting diode 1 as a light source.
2, 12... and a reflective frame 13 to adjust the shape of pixels (dots). By combining these, a large screen can be constructed, so in addition to displaying characters, so-called images can also be displayed. It is preferred by
In such display devices, many display devices are arranged in the same plane, so the terminals are connected to the lead pin 1.
However, the number of lead pins 14, 14, . . . will increase if the display density is increased or display can be performed in a plurality of hues. The roles of the lead pins 14, 14 (i.e., row input, column input, color signal, anode side input, cathode side input)
For example, the density becomes so high that lead pins cannot be wired and arranged symmetrically, but since the display surface is symmetrical to accommodate display connection, it is difficult to determine the role of the lead pins only by the arrangement. Become.

C. Purpose of the invention The invention has been made in consideration of the above points.

D. Structure of the invention The present invention maintains a symmetrical shape on the display side, aligns the lead pins on the back side, breaks the alignment asymmetrically, and fixes the reflective frame at the location where the alignment is broken. This is to indicate the directionality of the device and to prevent light leakage that occurs from the gap between the substrate and the reflective frame, which tends to occur in this type of display.

E. Embodiment FIG. 2 is a sectional view a and a bottom view b of a light emitting diode display according to an embodiment of the present invention. Reference numeral 1 denotes a board made of glass epoxy resin, paper epoxy resin, paper phenol resin, etc. as a base material and having printed wiring. 2,
2...2', 2'... are light emitting diodes such as GaP mounted and fixed on the substrate 1 and wired.
A plurality of light emitting diodes 2, 2' having different emission wavelengths are arranged within a pixel. Reference numeral 3 denotes a reflective frame made of white resin or the like and placed on the substrate 1 and surrounding the light emitting diodes 2, 2, . . . , 2', 2', .
Reference numerals 4, 4, . . . lead pins are made of iron, copper, or an alloy thereof, or are plated on the surface thereof, and are implanted in through holes previously provided in the substrate 1.

As an example, 21 lead pins 4, 4, etc. are required, but they are arranged in a 4 x 7 matrix instead of a 3 x 7 matrix, and the two central columns are arranged in rows. Three and four spaces 5 and 5 are provided from the left and right sides, respectively, and the reflective frame 3 is attached to the heat-sealing pins 6 and 6 in the spaces 5 and 5.
Or, it is fixed with caulking pins, locking claws, etc.
As a result, the reflective frame 3 is fixed to the substrate 1 approximately at the center, so that the bottom surface of the reflective frame 3 and the substrate 1 are in close contact with each other, and no light leakage occurs. Further, during manufacturing, the outer rows of lead pins 4, 4, . . . can be managed from the outside of the display, and the inner rows can be managed from the empty spaces 5, 5 side, resulting in good work efficiency. Furthermore, when or after combining a large number of display devices, the back side will be filled with lead pins, but for example, the place where four lead pins are missing will be aligned in the same row, which is different from the row where three lead pins are missing. If the arrangement of the display is correct, a specific pattern is drawn by the lead pins, so the arrangement can be seen at a glance, and wiring can be done reliably by using the missing lead pins as a reference.

F. Effects of the Invention As described above, the present invention includes a substrate, a light emitting diode placed on the substrate, a reflective frame surrounding the light emitting diode and placed on the substrate, and a reflective frame arranged in alignment with the substrate. In a light emitting diode display having a large number of lead pins, a part without lead pins is asymmetrically provided on the substrate, and the reflective frame is fixed at the part without lead pins, so the reflective frame and Light leakage through gaps in the substrate can be prevented, and even if a large number of symmetrical display surfaces are arranged, the arrangement direction and the role of the lead pins can be recognized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional display, and FIG. 2 is a cross-sectional view (a) and a bottom view (b) of a light emitting diode display according to an embodiment of the present invention. 1... Board, 2, 2... 2', 2'... Light emitting diode, 3... Reflective frame, 4, 4... Lead pin, 5,
5... Blank space for lead pin, 6, 6... Heat fusion pin.

Claims (1)

[Scope of utility model registration request] It has a substrate, a light emitting diode placed on the substrate, a reflective frame surrounding the light emitting diode and placed on the substrate, and a large number of lead pins arranged in multiple rows along the sides of the substrate. A light-emitting diode display, characterized in that a portion without lead pins is asymmetrically provided approximately at the center of the substrate, and the reflective frame is fixed at the portion without lead pins.