RU2443026C2 - Visual display unit - Google Patents

Abstract

FIELD: electronics.

SUBSTANCE: visual display unit comprises translucent housing 1 with its external side having a blue-coloured layer 2 with a lumen 3 shaped as the first character. A second red-colored layer 4 with a lumen 5 shaped as the second character is applied to the interior side of housing 1. Two LEDs are located at the interior side of housing 1: a red one 6 and a blue one 7. The spectral radiation band of LED 6 coincides with the absorption band of layer 2 and the spectral radiation band of LED 7 coincides with the absorption band of layer 4. A register switchboard 8 is provided.

EFFECT: increased number of displayed characters.

11 cl, 1 dwg

Description

Technical field

The claimed invention relates to electrical engineering, and more specifically to devices for presenting and inputting discrete information, and can be used in computer keyboards, mobile phones, and other similar devices.

Characteristics of analogues

Known letter visual indicator of the keyboard (see patent RU No. 2235354), including a translucent key body, on the outer surface of which is made with a dye one letter designation.

The advantage of the analog indicator is the large size of the sign image and the ease of selecting the desired key.

The disadvantage of the analogue is the inability to use these keys to enter other characters, which leads to an increase in the number of necessary keys in the keyboard.

A visual indicator is also known, including a translucent casing of a mobile phone key (see, for example, the Internet site http://lori.ru/258648), on the outer surface of which a dye image of several characters is made, which reduces the number of necessary keys compared to the first analogue.

The disadvantage of the second analogue in comparison with the first analogue is the need to reduce the size of the sign, which affects the visual perception of the sign, and also causes additional stress for the operator associated with the selection of the desired key.

Prototype Characterization

As a prototype, the applicant adopted the indicator of one of the first keys K4 (see patent RU No. 2313903), including a translucent body, a layer with a lumen made in the form of a sign, a light source is placed on the inside of the key body, which, passing through the lumen, forms Retina operator eye image of one sign.

The prototype indicator, in addition to the advantages of the first analogue (the large size of the sign image and the simplicity of choosing the right key), allows you to select the desired key in the dark.

The disadvantage of the prototype is the same as that of the first analogue - receiving on one indicator image only one character.

Technical challenge

The technical problem arising from the prior art is to increase the number of images of characters obtained using a single indicator, in comparison with the prototype.

The problem is solved due to the fact that the inventive visual indicator "Dannfeld" includes a translucent body, a layer, for example, blue with a gap made in the form of the first sign. A light source, such as a blue light emitting diode (LED), is arranged on the inside of the housing.

Moreover, at least one more layer is made sequentially with the first layer, for example red, with a gap in the form of a second sign. A light source corresponding to this layer is also provided, for example in the form of a red light-emitting diode. The spectral emission band of the blue LED coincides with the absorption band of the red layer, and the spectral emission band of the red LED coincides with the absorption band of the blue layer.

The indicator works as follows. To obtain an image of the first character, a red LED is turned on, which emits red light towards the case. Red light passes freely through the red layer, then the case and falls on the blue layer, which absorbs red light. Part of the red light passes through the lumen to the outside, forming an image of the first red sign on the operator’s retina. To obtain an image of the second character, turn off the red LED and turn on the blue LED. Blue light first falls on the red layer, which is absorbed, with the exception of that part of the light flux that enters the lumen in the red layer, through which the blue flux forms an image of the second sign in blue. Then, the formed image freely passes through the indicator body, the red layer and enters the operator’s eye, forming an image of the second blue mark on the retina of the eye.

Thus, thanks to a new set of essential features in the claimed invention, the technical problem is solved - the increase in the number of images of characters obtained using a visual indicator, in comparison with the prototype.

Layers of chromoselective material are located on one side of the housing, which is one of the possible options for placing layers relative to the indicator housing.

Layers of chromoselective material are located on both sides of the housing, which is another possible option for placing layers relative to the indicator housing.

In series with the first layer, two successively arranged layers with gaps in the form of signs are made, which makes it possible to obtain three types of signs with the help of a single indicator.

Layers of chromoselective material are mounted on a translucent substrate and are equipped with a means of attachment to the body, which is one of the options for connecting the layers with the body.

Layers of chromoselective material are made in the form of an interference filter, which is one of the options for the implementation of the layer.

The interference filter is made on the Lippmann photosensitive layer, which is an embodiment of the interference filter.

A light emitting diode is used as a light source, which is one of the possible embodiments of a light source.

A laser diode is used as a light source, which is another embodiment of a light source.

The casing is made of a chromoselective material with a lumen in the form of a sign, which allows the casing to carry out an additional functional role of the layer.

The clearance is made in the form of a hole filled with translucent material, which is an embodiment of the lumen in the layer. Filling the opening with translucent material prevents contamination of the lumen.

The case is made in the form of a key (for example, a laptop or a mobile phone) and is one of the possible variants of the case.

The inventive indicator "Dannfeld" is a new device, because he is unknown from the prior art.

The invention has an inventive step, because it does not explicitly follow from the prior art for a specialist.

The drawing schematically shows a functional diagram of the inventive device.

Concrete example

The visual indicator includes a translucent body 1, made in the form of a laptop key. On the outside of the housing 1, a layer 2 of blue color is made with a lumen 3 made in the form of the first sign (for example, the Russian letter A). On the inside of the housing 1, a red layer 4 is made with a lumen 5 in the form of a second character (for example, the English letter F). On the inner side of the housing 1 there are two LEDs: red light 6 and blue light 7. A register switch 8 is also provided for switching from the Russian font to English and vice versa. The spectral emission band of the LED 6 coincides with the absorption band of the layer 2, and the spectral emission band of the LED 7 coincides with the absorption band of the layer 4.

The Dannfeld indicator works as follows. To obtain the image of the Russian letter A, the switch 8 is switched to the upper position (see drawing). In this case, the LED 6 emits red light towards the housing 1. Red light freely passes through the red layer 4, then the housing 1 and falls on the blue layer 2, which absorbs red light. Part of the red light passes through the lumen 3 to the outside, forming the Russian letter A in red on the retina of the operator (laptop user). To obtain the image of the English letter F, the switch 8 is switched to the lower position (not shown in the drawing). In this case, the red LED 6 goes out, and the blue LED 7 turns on. Blue light first enters the red layer 4, which is absorbed, with the exception of that part of the light flux that enters the lumen 5. Blue light, passing through the lumen 5, then freely passes through the housing 1 and the red layer 2 and enters the eye of the operator, forming on the retina, the English letter F is blue.

Thus, thanks to a new set of essential features of the claimed invention, the technical task posed by the prior art, the increase in the number of images of characters obtained using one visual indicator in comparison with the prototype, is completely solved and, therefore, it meets the criterion of "industrial applicability".

In addition, to date, a prototype of the inventive device has been manufactured. Successful tests have been carried out confirming the efficiency of the inventive device. Foreign patenting is planned.

Claims (11)

1. A visual indicator, including a translucent body, a layer with a clearance made in the form of a sign, a light source is placed on one side of the body, characterized in that at least one more layer with a clearance in the shape of a sign is made in series with the first layer, and a light source corresponding to this layer is also provided, layers with a sign-shaped lumen are made of chromoselective material, and the spectral emission band of the light source coincides with the absorption band of the layer. 2. The visual indicator according to claim 1, characterized in that the layers of chromoselective material are located on one side of the housing. 3. The visual indicator according to claim 1, characterized in that the layers of chromoselective material are located on both sides of the housing. 4. The visual indicator according to claim 1, characterized in that in series with the first layer there are two successive layers with gaps in the form of signs. 5. The visual indicator according to claim 1, characterized in that the layers of chromoselective material are mounted on a translucent substrate and are equipped with means for attaching to the body. 6. The visual indicator according to claim 1, characterized in that the layers of chromoselective material are made in the form of an interference filter. 7. The visual indicator according to claim 1, characterized in that a light emitting diode is used as a light source. 8. The visual indicator according to claim 1, characterized in that a laser diode is used as a light source. 9. The visual indicator according to claim 1, characterized in that the housing is made of a chromoselective material with a lumen in the form of a sign. 10. The visual indicator according to claim 1, characterized in that the lumen is made in the form of a hole filled with translucent material. 11. The visual indicator according to claim 1, characterized in that the housing is made in the form of a key.