CN2131166Y

CN2131166Y - Light-emitting diode display apparatus with improved structure

Info

Publication number: CN2131166Y
Application number: CN 92209430
Authority: CN
Inventors: 陈德忠
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-14
Filing date: 1992-05-14
Publication date: 1993-04-28
Anticipated expiration: 2002-05-14

Abstract

The utility model relates to a luminous diode display of an improved structure. The utility model is composed of a printed circuit board, a reflecting plate and a luminous diode chip. The printed circuit board acts as the fixed base, and then the printed circuit board is sheathed in the reflecting plate which is provided with more than one bowl-shaped reflecting surfaces; the bowl-shaped reflecting surfaces are aimed at and is sheathed in the chip; the electrode sealing wire of the chip is fixed to the printed circuit board; the too thick reflecting plate is inappropriate, and the bowl-shaped reflecting surfaces can only surround the position where the chip is fixed; the sealing wire of the other electrode is separately fixed outside the bowl-shaped reflecting surfaces. The nearer the distance between the reflection surface and the chip is, the better collecting effect and the brightness the light reflection can be obtained.

Description

Light-emitting diode display apparatus with improved structure

The utility model relates to a kind of light emitting diode indicator, particularly relates to a kind of improvement of light emitting diode indicator structure.

Existing light emitting diode indicator is to distinguish according to outstanding admittedly light-emitting diode chip for backlight unit (LED CHIP) base, can be divided into two kinds haply, a kind of is to be base with metal lead frame (LEAD FRAME), another kind is to be base with printed circuit board (PCB) (P.C.B), the former is difficult for coupling at brightness and color and luster higher because of assembly cost and each light emitting diode, so is lessly adopted by the people, lower, easily manufactured and brightness and color and luster coupling are easier and the latter is because of its cost, so more welcome employing.

But this light emitting diode indicator that is constituted by base with printed-wiring board (PWB) 10 (as shown in Figure 4), adopt a reflecting plate 11 it up to be reflected mostly to be used for reflecting each light-emitting diode chip for backlight unit 12 of gathering light all around, to improve brightness, also the characteristics of luminescence because of its light-emitting diode chip for backlight unit 12 is to have part light A up to launch, part light B is arranged then toward emission (shown in accompanying drawing 2 and 5) all around, and make progress through reflecting surface 14 reflections of reflecting plate 11 toward the light of emission all around, this is through the reflection light intensity i upwards and square being inversely proportional to apart from d2 of 12 of reflecting surface 14 and light-emitting diode chip for backlight unit, if d1＜d2 then i1＞＞i2, meaning is the reflecting surface 14 distances 12 near more then light strong more (as shown in Figure 5) of reflection, but existing reflecting plate 11 must be able to surround the solid work of work light-emitting diode chip for backlight unit 12 and the position of electrode sealing wire (WIRE BONDING) 13, making has bigger distance around light-emitting diode chip for backlight unit 12 reflecting

surface

14 and 12 of light-emitting diode chip for backlight unit all around, so that focusing effect and brightness that light 15 is up launched have been lost in difficult gathering of the light 15 that reflecting surface 14 is reflected and weakening, so be not a desirable light emitting diode indicator.

The creator is in view of above-mentioned known shortcoming, and improved, to develop a kind of light emitting diode indicator that good congregational rate and brightness can be provided, this display utilizes a less bowl-shape reflecting surface, this reflecting surface only can surround the outstanding admittedly position of light-emitting diode chip for backlight unit, and the sealing wire position of another electrode is separately solid outstanding outside bowl-shape reflecting surface, so the distance between reflecting surface and light-emitting diode chip for backlight unit can become very near, the reflection of light just can obtain good congregational rate and brightness, the light that its reflection makes progress and the brightness of the original pointolite that light synthesized that makes progress of light-emitting diode chip for backlight unit, almost be launch the sum total of light source, its loss is very little, cooperate a simple combination of lenses again, can reach good light operation control effect, so be a very desirable light emitting diode indicator.

For further understanding the purpose and the technology contents thereof of the utility model, special with preferred embodiment conjunction with figs. detailed description, relevant accompanying drawing:

Fig. 1 is the three-dimensional cut-away section synoptic diagram of the structural improvement of the utility model light emitting diode indicator;

Fig. 2 is that synoptic diagram is assembled in the light reflection of this display;

Fig. 3 is the another kind of reflecting plate synoptic diagram of this display;

Fig. 4 is the three-dimensional cut-away section synoptic diagram of the light emitting diode indicator of prior art; And

Fig. 5 is that synoptic diagram is assembled in the light reflection of the prior art display.

See also the three-dimensional cut-away section synoptic diagram of structural improvement of the light emitting diode indicator of the utility model shown in the accompanying drawing 1, wherein this display system is by a printed circuit board (PCB) (P.C.B) 1, reflecting plate 2 and light-emitting diode chip for backlight unit 3 constitute, this printed circuit board (PCB) 1 is the base of solid outstanding light-emitting diode chip for backlight unit 3, can show light-emitting diode chip for backlight unit 3 on it admittedly, be inserted in by reflecting plate 2 again, this reflecting plate 2 is provided with at least more than one bowl-shape reflecting surface 21 and through hole 22, this through hole 22 is good more the closer to bowl-shape reflecting surface 21, its bowl-shape reflecting surface 21 is that alignment leds chip 3 is inserted in, the electrode sealing wire 31 of this light-emitting diode chip for backlight unit 3 penetrates through hole 22 solid works again on printed circuit board (PCB) 1, this reflecting plate 2 should not be too thick and its bowl-shape reflecting surface 21 only can surround the positions of light-emitting diode chip for backlight unit 3 solid works, and wiring 31 positions of another electrode are separately solid outstanding outside bowl-shape reflecting surface 21, so 3 of reflecting surface 21 and light-emitting diode chip for backlight unit is good more near effect more apart from d1, make the reflection of light 4 that its light-emitting diode chip for backlight unit 3 is launched to obtain good congregational rate degree (as shown in Figure 2), so be a very desirable light emitting diode indicator.

See also the another kind of reflecting plate synoptic diagram of this display shown in the accompanying drawing 3, wherein this reflecting plate 2 also can be designed to the net like reflecting surface with its bowl-shape reflecting surface 21, and the electrode sealing wire 31 of light-emitting diode chip for backlight unit 3 can be consolidated on the printed-wiring board (PWB) 1 of work outside bowl-shape reflecting surface 21 arbitrarily, and this bowl-shape reflecting surface 21 also to can be roughly be the matrix shape, can show the above light-emitting diode chip for backlight unit 3 of a slice in its reflecting surface at least admittedly.

To sum up discuss, a kind of light emitting diode indicator that good congregational rate and brightness can be provided, this display system utilizes a less bowl-shape reflecting surface, this reflecting surface only can surround the outstanding admittedly position of light-emitting diode chip for backlight unit, and the sealing wire position of another electrode is separately solid outstanding outside bowl-shape reflecting surface, so the distance between reflecting surface and light-emitting diode chip for backlight unit can become very near, the reflection of light just can obtain good congregational rate and brightness, the light that its reflection makes progress and the brightness of the original pointolite that light synthesized that makes progress of light-emitting diode chip for backlight unit, almost be launch the sum total of light, its loss is very little, cooperate a simple combination of lenses again, can reach good light operation control effect, so be a very desirable light emitting diode indicator.

Claims

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.