CN2346025Y

CN2346025Y - Light emitting diode display device

Info

Publication number: CN2346025Y
Application number: CN 98231621
Authority: CN
Inventors: 陈兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-06
Filing date: 1998-11-06
Publication date: 1999-10-27
Anticipated expiration: 2008-11-06

Abstract

The utility model relates to a light emitting diode display device, comprising an LED crystal grain, a basal plate or an electric-conduction support frame, sealant resin and a shell. The utility model is characterized in that a display window is arranged on the surface of the shell, the LED crystal grain is positioned where a light emitting region is not aligned to the display window, and the inner wall of the light emitting region which is provided with the LED crystal grain is provided with a reflecting surface. The light emitting diode display device provided by the utility model has the advantages of thinner thickness and uniform high brightness.

Description

Light emitting display device

The utility model relates to light emitting display device.

With regard to the LCD device, its biggest advantage is power saving, but power saving must not have under the situation of backlight.As notebook computer can only use less than ten hours under the start situation; If using a couple of days without the situation of backlight is next.

Present colored TFLLCD device all must use backlight, and backlight mostly is to adopt cold-cathode tube (CCFL).And again with regard to luminescence efficiency, high-brightness LED is a times of CCFL.When with CCFL during as the LCD backlight, its last sent brightness only is original about 5%, and most of light is all by LCD material such as colored filter, and polaroid, diffusion sheet etc. absorb, so poor light emission efficiency.

The thickness of visible light LED crystal grain is about 200 μ m, long 300 μ m, and wide 300 μ m, LED crystal grain are little pointolites, if will allow it form the even light of strip, then must adopt the skill of leaded light and diffusion to form.For example traditional seven segmentations, 8 font displays, as shown in Figure 8, be that LED crystal grain is placed on substrate or the support, and over against display window, place in the middle of the luminous zone, the sealing resin that will include diffusant more directly pours in the luminous groove, utilize the refraction of the reflection of luminous cell wall and sealing resin and light is able to evenly, but its thickness is about 7-9mm.With regard to regard to the conventional art viewpoint, become strip and uniform light source with a light is former, and accomplish thickness again below 2mm, be not easy really, even can accomplish, its brightness is also very dark, promptly luminescence efficiency is not good.

It is high and even that the purpose of this utility model provides a kind of brightness, the light emitting display device of thin thickness.

The light emitting display device that the utility model provides comprises LED crystal grain, substrate or conducting bracket, sealing resin and shell, wherein case surface is provided with display window, and LED crystal grain is placed in the luminous zone not on the position of display window, and the luminous zone inwall of ccontaining LED crystal grain is provided with reflecting surface.

Describe its structure and beneficial effect in detail below in conjunction with the utility model embodiment.

Fig. 1 is LED crystal grain and a sealing resin structure synoptic diagram among the utility model embodiment 1;

Fig. 2 is sealing resin and a shell mechanism synoptic diagram among the utility model embodiment 1;

Fig. 3 is the utility model embodiment 1 last complete front elevation;

Fig. 4 is the combination assumption diagram of the utility model embodiment 1;

Fig. 5 is a single luminous zone cut-open view among the utility model embodiment 1;

Fig. 6 is a single luminous zone cut-open view among the utility model embodiment 2;

Fig. 7 is a single luminous zone cut-open view among the utility model embodiment 3;

Fig. 8 is the structural representation of the light emitting display device that provides in the prior art.

See also Fig. 1, LED crystal grain 1 is a side that is placed in luminous zone 2, with traditional mode LED crystal grain 1 is placed on the central different of luminous zone 2.As Fig. 2, shown in 3, be with shell 3 and front elevation after the structure shown in Fig. 1 combines, mainly utilize shell 3 that the part that does not show in the luminous zone 2 is covered.

Fig. 4 is the combination assumption diagram of the utility model embodiment 1.Be to utilize the die casting mode to form luminous zone 2 sealing resin and substrate 5 in the die casting mode in this diagram, shell 3 is closed gets final product again, only exposes the display window 21 of wanting luminous position and gets final product.

Fig. 5,6,7 are respectively

embodiment

1,2,3 single luminous zone cut-open view.As shown in Figure 5, the inwall of ccontaining luminous zone 2 is curved in shell 3, and its reflecting surface 31 can make light obtain preferable brightness and make light even through reflection.Be liquid sealing mode in the present embodiment, earlier LED crystal grain 1 be fixed on the substrate 5, and connect lead.Outermost at the shell 3 with 8 fonts touch its outlet with adhesive tape in addition, and the substrate of finishing with assembling 5 directly combines with shell 3 again, and oppositely places, and pours into and fill up whole pedestal luminous zone 2 with liquid sealing resin, the baking molding of heating again.

Fig. 6 is the utility model embodiment 2 single luminous zone cut-open views.Present embodiment is made in the die casting mode, and is identical with Fig. 4, can be considered the cut-open view of single luminous zone among Fig. 4.In order to make light more even, can be at the most surperficial last layer diffusion sheet 4 that adds, equally also be designed to curved reflecting surface 31 in a side of luminescent grain 1, in order to reflection of light and diffusion.

Fig. 7 is the cut-open view in 3 single light districts of the utility model embodiment.Different is that reflecting surface 31 adopts inclined-planes for itself and embodiment 1,2.Adopt multi-form reflecting surface, purpose is the light reflection that LED crystal grain can be sent and guides to display window.

The utility model is placed in LED crystal grain one side of wire display window, utilize the reflection of reflecting surface that luminous energy is sent equably from the front, and utilize covering and reflection of shell, and the light outside luminous point and the display window is covered and reflects, make display window brightness improve.Fill with the sealing resin more at last, and form relatively thin (thickness can less than 2mm), the light emitting display device of high uniform luminance.Single light-emitting diode tube display device can be formed English alphabet or other pattern, as animal, flower, direction board etc.

Claims

1. light emitting display device, comprise LED crystal grain, substrate or conducting bracket, sealing resin and shell, it is characterized in that case surface is provided with display window, and LED crystal grain is placed in the luminous zone not on the position of display window, and the luminous zone inwall of ccontaining LED crystal grain is provided with reflecting surface.

2. light emitting display device according to claim 1 is characterized in that also being provided with diffusion sheet outside shell.