CN2131166Y - A Light Emitting Diode Display with Improved Structure - Google Patents

Abstract

A structure improved LED display is composed of a PCB as a fixed base, a reflector plate in the reflector plate with at least one bowl-shaped reflecting surface, and a LED chip with its electrode welding line fixed to PCB.

Description

The utility model relates to a light-emitting diode display, in particular to an improvement of the structure of a light-emitting diode display.

Existing light-emitting diode displays are distinguished according to the base of the fixed light-emitting diode chip (LED CHIP), which can be roughly divided into two types. One is based on a metal lead frame (LEAD FRAME) and the other is based on a printed circuit board. Board (P.C.B) is the base. The former is rarely used because of its high assembly cost and the brightness and color of each LED are difficult to match. The latter is because of its low cost, convenient manufacture, and easy matching of brightness and color. more popular.

But this kind of light-emitting diode display (as shown in Figure 4) formed with the printed circuit board 10 as the base mostly adopts a reflector 11 to reflect and gather light around each light-emitting diode chip 12 to make it reflect upwards. , to increase the brightness, and also because of the luminous characteristics of the light emitting diode chip 12, part of the light A is emitted upwards, and part of the light B is emitted to the surroundings (as shown in Figures 2 and 5), and the light emitted to the surroundings passes through The reflective surface 14 of the reflective plate 11 reflects upward, and the intensity i of the reflected upward light is inversely proportional to the square of the distance d2 between the reflective surface 14 and the light-emitting diode chip 12. If d1<d2, then i1>>i2, which means the reflective surface The closer the distance 14 is to 12, the stronger the reflected light (as shown in Figure 5), but the existing reflector 11 must be able to surround the fixation of the light-emitting diode chip 12 and the position of the electrode welding line (WIRE BONDING) 13, so that There is a relatively large distance between the reflective surface 14 surrounding the light-emitting diode chip 12 and the light-emitting diode chip 12, so that the light 15 reflected by the reflective surface 14 is difficult to gather and weakens the focusing effect and brightness of the upward emission of the light 15, so Not an ideal LED display.

In view of the above-mentioned known shortcomings, the creators improved to develop a light-emitting diode display that can provide good gathering effect and brightness. The display utilizes a small bowl-shaped reflective surface that can only surround the The position where the light-emitting diode chip is fixed, and the position of the welding line of the other electrode is separated and fixed outside the bowl-shaped reflective surface, so that the distance between the reflective surface and the light-emitting diode chip can become very close, and the reflection of light can be obtained. Very good gathering effect and brightness, the brightness of the point light source synthesized by the reflected upward light and the original upward light of the LED chip is almost the sum of the emitted light source, the loss is very small, combined with a simple The lens combination can achieve a very good light manipulation control effect, so it is a very ideal light-emitting diode display.

In order to further understand the purpose and technical content of the utility model, a preferred embodiment will be described in detail in conjunction with the accompanying drawings. The relevant drawings:

Fig. 1 is the three-dimensional section schematic diagram of the structural improvement of the light-emitting diode display of the present invention;

Figure 2 is a schematic diagram of light reflection and gathering of the display;

Fig. 3 is another schematic view of the reflector of the display;

FIG. 4 is a schematic cross-sectional view of a three-dimensional portion of a light-emitting diode display in the prior art; and

FIG. 5 is a schematic diagram of light reflection and collection of the prior art display.

Please refer to the three-dimensional partial cross-sectional schematic diagram of the structural improvement of the light-emitting diode display of the utility model shown in accompanying drawing 1, wherein the display is composed of a printed circuit board (P.C.B) 1, a reflector 2 and a light-emitting diode chip 3. The printed The circuit board 1 is a base for fixing the light emitting diode chip 3, on which the light emitting diode chip 3 can be fixed, and then inserted into the reflecting plate 2, the reflecting plate 2 is provided with at least one bowl-shaped reflecting surface 21 and Through-hole 22, the closer the through-hole 22 is to the bowl-shaped reflective surface 21, the better. The bowl-shaped reflective surface 21 is aligned with the light-emitting diode chip 3, and the electrode welding wire 31 of the light-emitting diode chip 3 is inserted into the through-hole 22. Fixed on the printed circuit board 1, the reflector 2 should not be too thick and its bowl-shaped reflective surface 21 can only surround the position where the light-emitting diode chip 3 is fixed, and separate the wiring 31 of the other electrode and fix it on the bowl Outside the reflective surface 21, the closer the distance d1 between the reflective surface 21 and the light-emitting diode chip 3 is, the better the effect is, so that the reflection of the light 4 emitted by the light-emitting diode chip 3 can obtain a good concentration effect (as shown in the accompanying drawing 2), it is a very ideal LED display.

Please refer to another schematic diagram of the reflector of the display shown in accompanying drawing 3, wherein the reflector 2 can also design its bowl-shaped reflective surface 21 into a mesh-shaped reflective surface, and the electrode welding wire 31 of the light-emitting diode chip 3 It can be arbitrarily fixed on the printed circuit board 1 outside the bowl-shaped reflective surface 21, and the bowl-shaped reflective surface 21 can also be roughly concave shape, and at least one or more light-emitting diode chips 3 can be fixed in the reflective surface.

In summary, a light-emitting diode display that can provide a good concentration effect and brightness, the display uses a small bowl-shaped reflective surface, which can only surround the fixed position of the light-emitting diode chip, and Separate and fix the welding line of the other electrode outside the bowl-shaped reflective surface, so that the distance between the reflective surface and the light-emitting diode chip can become very close, and the reflection of light can obtain a good gathering effect and brightness. The brightness of the point light source synthesized by the reflected upward light and the original upward light of the LED chip is almost the sum of the emitted light, and the loss is very small. With a simple lens combination, a good light can be achieved Operation control effect, so it is a very ideal LED display.

Claims (3)

1, a kind of light emitting diode indicator of architecture advances is characterized in that it comprises:

One light-emitting diode chip for backlight unit, this light-emitting diode chip for backlight unit upper end is provided with a strip electrode sealing wire;

One printed circuit board (PCB), this printed circuit board (PCB) are the base of solid outstanding light-emitting diode chip for backlight unit, can show light-emitting diode chip for backlight unit on it admittedly; And

One reflecting plate, this reflecting plate is provided with at least more than one bowl-shape reflecting surface and through hole, this through hole is near bowl-shape reflecting surface, its bowl-shape reflecting surface is that the alignment leds chip is inserted in, it is outstanding admittedly on printed circuit board (PCB) that the electrode sealing wire of this light-emitting diode chip for backlight unit penetrates through hole again, the bowl-shape reflecting surface of this reflecting plate only can surround the outstanding admittedly position of light emitting diode, and the sealing wire position of another electrode is separately solid outstanding outside bowl-shape reflecting surface, and reflecting surface is near light-emitting diode chip for backlight unit, so that the reflection of light that this light emitting diode is launched can obtain good congregational rate and brightness.

2, the light emitting diode indicator according to claim 1 is characterized in that can installing in the bowl-shape reflecting surface set on this reflecting plate at least more than one light-emitting diode chip for backlight unit.

3, the light emitting diode volumetric display according to claim 1, it is characterized in that this reflecting plate also can be designed to the net like reflecting surface with its bowl-shape reflecting surface, and the electrode sealing wire of light-emitting diode chip for backlight unit can be consolidated arbitrarily on the printed circuit board (PCB) of work outside bowl-shape reflecting surface.

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