CN2049782U

CN2049782U - Liquid crystal character-shaped display board used in lightless conditions

Info

Publication number: CN2049782U
Application number: CN 89202113
Authority: CN
Inventors: 李景惠
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-01
Filing date: 1989-03-01
Publication date: 1989-12-20

Abstract

The utility model discloses a liquid crystal character-shaped display board used in lightless conditions, relating to the field based on a liquid crystal controlling the light polarizing device coming from an independent light source. The liquid crystal character-shaped display board of the design used in the lightless conditions is composed of a polarizing sheet (1), a glass sheet (2), a liquid crystal character-shaped sheet (3), a glass sheet or an organic glass sheet (4) and a fluorescent back bottom (6) which is adhered on the glass sheet or the organic glass sheet (4) by a glue with good transparence. The liquid crystal character-shaped display board of the design has good light reflecting ability in a normal light environment, and the character-shaped display effect of the design is approximate to the common liquid crystal character-shaped display board; under the lightless conditions, the liquid crystal character-shaped display board has bright and lasting fluorescence and clear character shape displaying, and people can clearly watch the character shape at the distance of the distinct vision of the people.

Description

Liquid crystal character-shaped display board used in lightless conditions

The utility model relates to based on the devices field of liquid crystal control from the light polarization of arbitrary source.At present common liquid crystal font display board generally is made up of polaroid and the liquid crystal font sheet that is clipped between two glass sheet, and in order to make clear display, most of display boards also are stained with reflective foil at the bottom of the back of the body of this display board.This display board shows that by liquid crystal font and polaroid polaroid can make natural light become the polarized light that only vibrates in its crystal orientation.Two polaroid stacks can be formed the polarization pair, and when the crystal orientation of this two polaroid was parallel, natural light can pass through this polarization pair; When both crystal orientation were vertical, natural light just can not see through this polarization pair.One of characteristic of liquid crystal is under effect of electric field, and its crystal orientation deflects, and makes the natural light by it become polarized light, and LCD panel has been utilized this characteristic just.But the liquid crystal font is with the injecting as the prerequisite that shows of light, when injecting light when strong, the black and white contrast at the font of demonstration and the back of the body end is just big, shows just clear; A little less than incident ray, then the font of Xian Shiing is just little with the black and white contrast at the back of the body end, therefore, shows just unclear; Just can't see in the font that does not have to show on the display board under the environment of light.Have a variety of electronic watches etc. to add a miniature bulb as light source in that LCD panel one side is auxilliary, so that liquid crystal shows font under no luminous environment, doing so also has shortcoming, must press the release knob of lampet in use with the another hand, uses cumbersome; Have, it is more to light the lampet power consumption again, and this is worthless to the used battery of display device such as electronic watch.

The purpose of this utility model is not add the font that miniature bulb also can make LCD panel and obtains showing under no luminous environment.

The purpose of this utility model is achieved in that thereby adhering to fluorescence back of the body end the purpose of this utility model at the bottom of the back of the body of display board has just reached fully.

Below by accompanying drawing the utility model LCD panel is elaborated:

Accompanying drawing 1 is the liquid crystal display situation that is stained with reflective foil at the bottom of showing backboard, and accompanying drawing 2 is structures of the utility model LCD panel; Accompanying drawing 3 is the utility model LCD panel liquid crystal display situations under no luminous environment.

Be made up of polaroid (1), glass sheet (2), liquid crystal font sheet (3), glass sheet or organic glass sheet (4) and the reflective foil back of the body end (5) from the liquid crystal font display board at the 1 visible band reflective foil back of the body end of accompanying drawing, circuit board omits.Three kinds of demonstration situations are arranged: accompanying drawing 1-a and 1-b as seen with the font that should show (7) on the liquid crystal font display board of reflective foil through the energising after, this font (7) is under electric field action, the deflection of liquid crystal crystal orientation, thereby become font with inclined to one side ability, these fonts and polaroid are formed the orthogonal polarization pair in crystal orientation, natural light can not be seen through, accompanying drawing 1-a is the situation that light passes through in LCD panel, arrow is represented the light travel direction, and the approach that on behalf of impervious trimmed book, dotted line should pass through, thereby these fonts (7) are just showed dark color, shown in accompanying drawing 1-b; The font (8) that should not show on accompanying drawing 1-C and the visible liquid crystal font of 1-d display board (font that will should show among 1-a and 1-b here is an example as the font that should not show) this liquid crystal font (8) after cutting off the power supply is not subjected to the action of a magnetic field, remain stationary in its crystal orientation, liquid crystal does not play inclined to one side ability, by its natural light without any variation, natural light is during by polaroid and these fonts, only through a polaroid, so transmitted light (being polarized light) is shown in Fig. 1-C, these fonts demonstrate the reflective foil back of the body light color at the end, see that accompanying drawing 1-d is in no liquid crystal font part (9), natural light is also only through a polaroid, so have light to pass through and reflect (being polarized light), see shown in the accompanying drawing 1-e that these parts also show the reflective foil back of the body light color at the end, shown in accompanying drawing 1-.The dark color that in accompanying drawing 1-b, should show font (7) the light color back of the body end to lining under especially eye-catching, thereby realized the demonstration of font, but can't show in that no luminous environment is next.

Owing to above reason, many timers that with the liquid crystal font are display device etc. can not use under no luminous environment easily.The utility model selects for use the fluorescence back of the body end to replace the reflective foil back of the body of the prior art end.The used reflective foil back of the body of prior art end ambient light power all can only reflect incident ray, and can there be dual-use function at the fluorescence back of the body end, promptly can reflect incident ray when light is strong.The fluorescence light can take place when time a little less than the light.Because regular meeting is exposed under the light during LCD panel, eye-catching fluorescence just can be sent in the fluorescence back of the body end under no luminous environment after irradiate light.Have at the bottom of the back of the body of this light, add that liquid crystal font and polaroid just can form bright dark clearly demarcated demonstration font.

The utility model liquid crystal font display board (seeing accompanying drawing 2) is by polaroid (1), and glass sheet (2), liquid crystal font sheet (3), glass sheet or organic glass sheet (4) and the fluorescence back of the body end (6) are formed.Compare with the font display board (seeing accompanying drawing 1～3) of prior art, the utility model just replaces the reflective foil back of the body end (5) with the light back of the body end (6), and its structure is seen accompanying drawing 2.The fluorescence back of the body end (6) will be used the demonstration color contrast of liquid crystal font sheet (3) big white or lurid fluorescent material, the same size of its size or slightly smaller with glass sheet or organic glass sheet (4), but can cover whole liquid crystal fonts at least, the side that it contacts with LCD plate will have reflective as well as possible, so that the ability of enough reflection incident raies is arranged, guarantee clear display when ambient light is strong.The organic glass of the fluorescence back of the body end (6) and LCD plate (3) back or glass sheet (4) in order to avoid the fluorescence back of the body end (6) is cracked because of vibrating, or damage the integrated circuit on its next door, all right simultaneously strong display effect with the good glue bond of transparency.

Accompanying drawing 3 is the design's liquid crystal font display board liquid crystal display situations under no luminous environment, accompanying drawing 3-a and 3-b are the occasion of font (10) energising that should show, under electric field action, the deflection of liquid crystal crystal orientation, make this font (10) become font with inclined to one side ability, these fonts and polaroid (1) have been formed an orthogonal polarization pair in crystal orientation, make any light comprise that fluorescence all do not pass by thoroughly, and the part that does not have font can see through fluorescence, thereby under no luminous environment, also can show bright dark clearly demarcated font, for example the font (10) that shows of 3～a; Accompanying drawing 3-C and 3-d are that (this font is at accompanying drawing 3-b the font that should not the show font (11) among the accompanying drawing 3-d for example

Claims

1, liquid crystal font display board, comprise polaroid (1), glass sheet (2), liquid crystal font sheet (3), glass sheet or organic glass sheet (4), it is characterized in that: adhere to the fluorescence back of the body end (6) at the bottom of the back of the body of said display board, the said fluorescence back of the body end (6) with the good glue bond of transparency on glass sheet or organic glass sheet (4).