CN2304222Y

CN2304222Y - Instrument display board

Info

Publication number: CN2304222Y
Application number: CN 97237206
Authority: CN
Inventors: 曹列
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-12
Filing date: 1997-06-12
Publication date: 1999-01-13
Anticipated expiration: 2007-06-12

Abstract

The utility model relates to an instrument display board. According to the principle of optical fibre conduction, a plurality of color luminous chips are used as a light source and are buried near the display region of the display plate having high refraction light density medium, connected with a silk-screen circuit, and form sealing integration with a compact structure. The display region of the plate is provided with a semi-through hole or a through hole used for pouring epoxy resin having fluorescence dispersive colors; the color light can in a diffuse reflection from the display region of the display plate; the accurate precision, reliability, and homogeneity of instrument display are enhanced. The utility model is an instrument lighting device.

Description

The instrument display panel

The utility model relates to a kind of instrument display panel, belongs to semiconductor light-emitting display device, can be used at dusk and need night the place of display graphics, character, also can make the original light source that the instrument intraoral illumination is the instrument back lighting.

The instrument intraoral illumination adopts bulb as original light source mostly in existing technology, and by the zone that light guide plate reflects, reflection is transmitted to demonstration, but bulb life is short, and poor reliability is fragile under the situation of vibration; Stopping of the concentrated relatively and meter movement of bulb luminosity, make the character of demonstration inhomogeneous; The light conducting plate structure complexity, technological requirement is higher, the noncontact conduction of bulb and light guide plate, the luminous energy loss is big, and caloric value is big, cause instrument indication value inaccurate, usually bulb is installed on the printed circuit board, needs die punching during installation, bulb is twisted be stuck on the printed circuit board, easily get loose poor reliability when the reed of bulb and printed circuit panel vibration.The utility model patent that " dial illumination device " arranged on patent documentation G12B11/00 class, though the problems referred to above have been done improvement, but this patent is arranged on optical plate side elevation place with the semiconductor light emitting chip, following deficiency is so just arranged: one, since the optical plate degree of purity do not reach the optical fiber level, the loss of light conduction is also bigger, in the inhomogeneities that causes demonstration from the far away and nearer viewing area of luminescence chip; Two, this patent changes the power that reflects bright dipping by the indentation depth on the optical plate, if the identical scale shade of light and shade will be caused in the dark viewing area of indentation, if indentation is more shallow, causes the brightness of viewing area not enough again.

The purpose of this utility model provides a kind of instrument display panel, the circuit of its display panel and light path are the solid envelope integral body of a compact conformation, the viewing area design of instrument display panel has half through hole or through hole and pours into the epoxy resin of the diffusing look of band fluorescence, bright, uniform light is come out from the viewing area diffuse reflection, improved the accurate precision of demonstration, the reliability of instrument, the uniformity of demonstration.

In order to achieve the above object, the utility model has adopted a plurality of greens or yellow luminescence chip directly to bury dress as light source and has been fixed near the viewing area in the instrument display panel, and the silk-screen circuit also is printed on the instrument display panel.Every group be two or more band look luminescence chips with silk-screen circuit coupled in series after in parallel again, the solid envelope integral body that makes circuit on the instrument display panel and light path become a compact conformation.The viewing area design of instrument display panel has half through hole or through hole, and pours into the epoxy resin of the diffusing look of band fluorescence, and bright uniform light is come out from the viewing area diffuse reflection of instrument display panel.Every optical cavity with opaque material (for example using black ABS material), built-in a plurality of redness or orange luminescence chip, aperture is arranged at the bottom every optical cavity, a plurality of redness or orange luminescence chip connector lug by aperture pass with the connector lug of silk-screen circuit earlier series connection back mode in parallel be connected, penetrate direction and the position that red or orange illumination light shows that Light conducting pointer rotates by placing every the red of optical cavity or orange luminescence chip.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the structure chart of instrument display panel.

Fig. 2 is that instrument has the chip connection in series-parallel of display panel to connect schematic diagram.

Fig. 3 is that the single chip of instrument display panel connects schematic diagram with the silk-screen circuit.

As shown in Figure 1: structure of the present utility model comprises: display panel 1, green or Yellow luminous chip 2, silk-screen circuit 3, pin Wire fastener 4 and 6, fluorescence loose colour circle epoxy resins 5, every optical cavity 7, red or orange luminescence chip 8, movement 9, Light conducting pointer 10, panel board 11.

As the basic principle of Fig. 2, the utility model shown in Figure 3 employing fiber optic conduction, the i.e. total reflection principle of light.Green or yellow luminescence chip 2 directly buries near the viewing area that is contained in the display panel 1 with high refraction optically denser medium as light source, and silk-screen circuit 3 is printed on the display panel 1.Green or Yellow luminous chip 2 and redness or orange luminescence chip 8 all adopt a plurality of and silk-screen circuit 3 to form corresponding several groups, every group is by two or more green or Yellow luminous chips 2 and redness or orange luminescence chip 8 and parallel connection again after silk-screen circuit 3 connect earlier respectively, draw respectively as positive and negative electrode with two single core plastic wires then, with pin Wire fastener 4 single condctor is fixed on the display panel 1, makes the circuit of instrument display panel and the solid envelope integral body that light path becomes a compact conformation.Design has half through hole or through hole and pours into the epoxy resin 5 of being with the diffusing look of fluorescence in the viewing area of display panel 1.Skin at display panel 1 has the lower optically thinner medium of refractive index, when the light that chip sends is injected optically thinner medium from the display panel 1 with high refraction optically denser medium, incidence angle is when facing Jie angle, light just carries out the total reflection conduction along two kinds of medium interfaces, and can not pass optically thinner medium, and the luminous energy loss is little, like this, bright, uniform light is come out from the viewing area diffuse reflection of display panel 1, improved the instrument display brightness, reliability and uniformity.

Make every the good opaque material of optical property every optical cavity 7 of, black ASB for example, built-in red or orange luminescence chip 8, embed in the display panel 1 every optical cavity 7, built-in a plurality of red or orange luminescence chip 8, every optical cavity 7 bottoms aperture is arranged, the connector lug of a plurality of redness or orange luminescence chip 8 passes with the connector lug of silk-screen circuit 3 fixing with pin Wire fastener 6 by aperture, and series connection back mode in parallel connects earlier then.Panel board 11 is fastened on the display panel 1, and display panel 1 and panel board 1 have the screw hole of two correspondences, connect by screw between them.On optical cavity 7, the needle shaft on the movement 9 refills Light conducting pointer 10 towards stretching out by the through hole in optical cavity 7 to movement 9 on the needle shaft, like this, formed non-contacting assembly structure every optical cavity 7 and Light conducting pointer 10 by screw.When Light conducting pointer 10 rotates around movement 9, place the red or orange luminescence light that reflects every the red of optical cavity 7 or orange luminescence chip 8 just can demonstrate the direction and the position of Light conducting pointer 10 rotations.

Green or Yellow luminous chip 2 adopts gallium phosphides to make, and red or orange luminescence chip 8 adopts gallium arsenide phosphides to make, and the former the green or yellow look of choosing any one kind of them is placed near the viewing area in the display panel 1; Red or the orange look of also choosing any one kind of them of the latter places every optical cavity.The color of band look luminescence chip also can be selected for use as required.

Advantage of the present utility model:

1. the utility model has adopted a plurality of green or Yellow luminous chips 2 directly to bury dress as light source to be enclosed in admittedly near the viewing area in the display panel 1, and silk-screen circuit 3 also is printed on the solid envelope integral body that the circuit that makes this plate on the display panel 1 and light path become a compact conformation.

2. the volume of luminescence chip is little, brightness is high, not fragile, life-span reaches 100,000 working hours; Simultaneously, luminescence chip belongs to athermic cold light source, and movement member is not on every side had the indicating accuracy that the thermal radiation influence has improved electrothermic instrument; Power consumption is little, only is 1/10th of bulb.

3. adopting the basic principle of fiber optic conduction is the total reflection principle of light, and optical energy loss is little, the bright position of band look, comes out from the viewing area diffuse reflection of instrument display panel uniformly, has improved the brightness and the uniformity of instrument demonstration.

Claims

1. the utility model is a kind of instrument display panel, comprise: display panel (1), green or Yellow luminous chip (2), silk-screen circuit (3), pin Wire fastener (4) and (6), fluorescence loose colour circle epoxy resins (5), every optical cavity (7), red or orange luminescence chip (8), movement (9), Light conducting pointer (10), panel board (11), it is characterized in that: a plurality of green or Yellow luminous chips (2) directly bury dress be fixed near the viewing area of display panel (1) be printed on display panel (1) on silk-screen circuit (3) be connected.

2. a kind of instrument display panel according to claim 1 is characterized in that: in the design of the viewing area of display panel (1) half through hole or through hole are arranged, and pour into the epoxy resin (5) of the diffusing look of band fluorescence.

3. a kind of instrument display panel according to claim 1 is characterized in that: use opaque material every optical cavity (7), be embedded in the display panel (1) built-in a plurality of red or Yellow luminous chips (8).