KR200281787Y1 - Negative pattern display a traffic signal lamp with back light liquid crystal display - Google Patents

Abstract

The present invention uses a liquid crystal display and a color backlight to transmit a traffic light by reversed phase inversion so that the color or shape is displayed in a lit state, thereby eliminating shading shades, and reducing the power consumption of a backlight liquid crystal display (LCD). It relates to a reverse-phase display traffic signal having, the backlight panel 30 which is installed on the inner rear of the traffic light case 20, and located in front of the backlight panel 30 is inverted when a light signal is applied is reversed from the backlight panel 30 A color film that is interposed between the liquid crystal panel 40 transmitting the emitted light and the liquid crystal panel 40 interposed between the liquid crystal panel 40 and the backlight panel 30 to transmit the light emitted from the backlight panel 30 to the liquid crystal panel 40. 50) and a liquid crystal protective polycarbonate plate 60, which is provided on the front surface of the liquid crystal panel 40 and whose center is convex outward.

Description

Negative pattern display a traffic signal lamp with back light liquid crystal display}

The present invention relates to a reverse-phase display traffic signal having a backlight liquid crystal display (LCD) that can be applied to a vehicle or a pedestrian. More specifically, the liquid crystal display and a color backlight are used to transmit and display the signal by reverse phase inversion. The present invention relates to a reverse-phase display traffic signal lamp having a backlight liquid crystal display (LCD) to remove the shading shade and save power.

In general, traffic lights are used to indicate traffic conditions in color for safe traffic order. There are three colors, red, green, and orange, and red lights (hereinafter, "red lights"). ) Is a stop signal, green light (hereinafter referred to as "green light") is a progress signal, and orange light is indicated as a caution, but orange traffic (hereinafter referred to as "yellow light") is detoured on road traffic. Also used.

Such traffic lights are roughly classified into traffic lights using halogen lamps and traffic lights using light emitting diodes.

Among them, a reflector was installed at the rear of a halogen lamp as a light source, and a diffuser lens was installed at the front to diffuse light in various directions to reduce glare caused by the concentration of light.

In addition, a light shielding shade is installed above the diffusion lens to prevent sunlight from being reflected by a reflector installed therein, which makes it difficult to determine which signal light is turned on (phantom effect). It was supposed to prevent.

However, the conventional traffic light using such a halogen lamp has a problem that the surface of the diffusing lens should be cleaned regularly because of the shading shade cannot be expected to be natural, and therefore the maintenance cost for cleaning It was necessary.

That is, on the road, tire dust generated by friction between the tire and the road surface, carbides generated from exhaust gas, and various dusts blown while driving the vehicle are adsorbed on the surface of the diffusion lens, which reduces light transmittance. It can maintain the required light transmittance only by cleaning artificially or naturally, but in the past, the shading shade positioned above the diffusing lens blocks the rainwater, so natural washing could not be expected. There was a lesion at the surface where staining occurred.

In addition, even when the shading shade is installed, when the sunlight rays are shining toward the front of the traffic light, the faint phenomena, which are difficult to distinguish from the lit traffic light, are still generated because the light is transmitted inside and reflected by the reflector. .

Therefore, the shading shade must be installed for a longer time, and the long shading shade has a problem of lowering the recognition rate by blocking the light spreading to the side as well as blocking the light of the traffic light.

In addition, the lifespan of a signal lamp using a halogen lamp is very short, such as 5 months, which leads to a problem of high maintenance costs.In order to light a halogen lamp, a large current and a large voltage power supply are required. There was a problem of a possible safety accident.

On the other hand, in the case of a traffic light using a light emitting diode (LED), a large number of high brightness light emitting diodes are arranged on a printed circuit board at narrow intervals, and each light emitting diode has a current limiting resistor connected thereto. On the front was a transparent protective cover.

However, the conventional traffic light using such a light emitting diode also needs a shading shade like a traffic light using a halogen lamp, so natural cleaning by rainwater cannot be expected. Therefore, the surface of the transparent protective cover must be periodically cleaned. This required a maintenance fee for cleaning.

In addition, a signal lamp using a light emitting diode has a problem in that a plurality of light emitting diodes are arranged on a printed circuit board and a current limiting resistor is connected to each light emitting diode, so that the failure rate is high.

In addition, in the case of expressing a predetermined pattern (e.g. arrow shape, human walking, etc.) using a light emitting diode on a traffic light, the entire transparent protective cover is covered with an opaque sheet and the center is cut out to a desired shape to transmit light. Or an opaque sheet was attached to the center of the transparent protective cover, but there was a problem that the internal light emitting diode is visible through the transparent protective cover when turned off.

Conventional power consumption of the signal lamp using a halogen lamp is about 100 watts (W), the signal lamp using a light emitting diode has a problem that the power consumption is large because the power consumption is about 20 watts (W).

The present invention has been made to solve the above problems, the object of which is to prevent the phantom phenomenon by facilitating the distinction between the unlit signal lamp and the lit signal lamp even if the shade shade for blocking the sunlight is excluded. At the same time, it enables natural cleaning by rain water, makes the inside invisible when extinguished, extends the lifespan, makes the structure simpler, facilitates manufacturing, and enables the control of small current and small voltage. The present invention provides a reversed phase traffic signal having a backlight liquid crystal display (LCD) that reduces power consumption and makes control easier and prevents electric shock in case of a short circuit.

In order to achieve the object of the present invention, a backlight panel installed on the inner rear of the traffic light case, a liquid crystal panel positioned in front of the backlight panel and inverted when a lighting signal is applied to transmit the light emitted from the backlight panel, and the liquid crystal panel And a color film interposed between the backlight panel and the backlight panel to transmit light emitted from the backlight panel to the liquid crystal panel, and a polycarbonate plate for protecting the liquid crystal, which is installed on the front surface of the liquid crystal panel and is formed to be convex outward. A reversed phase traffic light having a backlight liquid crystal display is provided.

1 is a cross-sectional view showing the configuration of a reverse phase traffic light having a backlight liquid crystal display (LCD) according to the present invention.

Figure 2a is a view showing a state in which the red light of the traffic lights applied to the horizontal four-colored light according to the present invention.

Figure 2b is a view showing a state in which the yellow light of the traffic light applied to the horizontal four-way light according to the present invention.

Figure 2c is a view showing a state in which the direction indicator light of the traffic signal applied to the horizontal light in accordance with the present invention.

Figure 2d is a view showing a state in which the green light of the traffic lights applied to the horizontal four-way light according to the present invention.

Figure 3a is a view showing a state in which the red light of the traffic signal lamp applied to the vertical dichroic light according to the present invention.

Figure 3b is a view showing a state in which the green light of the traffic lights applied to the bell-shaped dichroic light according to the present invention.

Figure 4a is a view showing an example in which the number is displayed "19" seconds applied to the use for displaying the remaining time of the traffic lights according to the present invention.

Figure 4b is a view showing an example in which the number is displayed "0" is applied to the use for displaying the remaining time of the traffic lights according to the present invention.

* Explanation of Signs of Major Parts of Drawings *

20: traffic light case 30: backlight parallel 40: liquid crystal panel

42: light absorption background area 44: transmission pattern 46a, 46b: light transmission area

48a, 48b: Light blocking pattern 50: Color film 60: Polycarbonate plate for liquid crystal protection

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the backlight panel 30 installed on the inner rear of the traffic light case 20 and the backlight panel 30 are located in front of the backlight panel 30 and are inverted when a lighting signal is applied. A color film that is interposed between the liquid crystal panel 40 transmitting the emitted light and the liquid crystal panel 40 interposed between the liquid crystal panel 40 and the backlight panel 30 to transmit the light emitted from the backlight panel 30 to the liquid crystal panel 40. 50) and the polycarbonate plate 60 for liquid crystal protection provided in the front surface of the liquid crystal panel 40, and the center is formed convexly outward.

Here, the polycarbonate plate 60 for protecting the liquid crystal should be transparent, the center of which protrudes in the form of a dome (doom) toward the outside to be seen in the side direction.

In addition, the front surface of the traffic light case 20 is cut out in a circular or rectangular shape for the transmission of light, and a protective case 26 in which a power supply circuit and the like, such as a printed circuit board, can be mounted therein.

The backlight panel 30 may be configured of a well-known cold cathode fluorescent lamp (CCFL) having an electroluminescence (EL) element or a reflector, and may be configured as an array of high brightness light emitting diodes. It may also be configured as a halogen lamp provided with a reflector (not shown).

In addition, it may be installed in a signal lamp made of a conventional halogen lamp, which is to remove the magnifying lens of the signal lamp and then install the color film 50 and the liquid crystal panel 40 in front of the halogen lamp, the existing halogen lamp and reflector can be reused. Will be.

2a to 2d show an example in which the present invention is applied to a horizontal four-colored light, and as shown therein, a red traffic light 70, a yellow traffic light 72, and a direction indicator from the left side. 74, the green traffic light 76 is shown, and the red, yellow, green, and green color films 50 are inserted in each.

2A, 2B, and 2D, the red traffic light 70, the yellow traffic light 72, and the green traffic light 76 transmit light emitted from the backlight panel 30 by inversion. The lighting pattern is circular, and the remaining direction indicator light 74 is composed of a light absorption background region 42 in which the outer edge of the liquid crystal panel 40 is always kept in an opaque state as shown in FIG. 2C. In addition, an arrow-shaped transmission pattern 44 which is positioned at the center of the light absorption background region 42 and transmits light emitted from the backlight panel 30 while being inverted when a lighting signal is applied is formed to thereby generate green light. Will be emitted.

3A and 3B show an example in which the present invention is applied to a vertical dichroic lamp, and as shown therein, a red traffic light 80 at an upper side and a green traffic light 82 at a lower side thereof. In each case, the red and green color films 50 are inserted into each other, and an outer shape thereof is formed in a quadrangular shape. Each liquid crystal panel 40 is inverted when a light signal is applied and radiated from the backlight panel 30. Outer light transmission backgrounds 46a and 46b for transmitting light are formed, and are positioned in the center of the light transmission backgrounds 46a and 46b, and are always kept in an opaque state. Patterns 48a and 48b are formed.

That is, in the case of the red traffic light 80, as shown in FIG. 3A, the light blocking pattern 48a is formed by a standing pattern of a standing person. Block the light emitted from the backlight panel 30, and the remaining light transmission area 46a is in the "OFF" state to transmit a red light emitted from the backlight panel 30 to inform the signal to stop. It is configured to be.

In the case of the green traffic light 82, the light blocking pattern 48b is a walking pattern of a walking person, as shown in FIG. 3B. In this state, the light emitted from the backlight panel 30 is blocked, and the remaining light transmission area 46b is in the "OFF" state to transmit green light emitted from the backlight panel 30 to cross the crosswalk. It is configured to inform the signal.

On the other hand, Figures 4a and 4b is an example showing the applied to the down count traffic light indicating the remaining time of the traffic lights according to the present invention, as shown, for example, so as to represent a maximum of two digits 7 seven-segment reversed-phase display patterns 90 are formed in the portion representing the one-digit number on the liquid crystal panel 40, and the two-segment inverted phase for indicating only the number " 1 " The display pattern 92 is formed.

That is, the down count by the liquid crystal panel 40 is configured to display, for example, starting at 19 seconds, decreasing by 1 second, and finally displaying the number "0", and a 7-segment reverse phase display pattern to be turned on when down counting. 90 or the two-segment inverse display pattern 92 is turned "OFF" to be inverted to a transparent state, and the remaining seven-segment inverse display pattern 90 or two-segment inverse display pattern 92 to be turned off. The base portion is turned “ON” and remains opaque while the light emitted from the backlight panel 30 is transmitted through the inverted 7-segment inversion display pattern 90 or the two-segment inversion display pattern 92. It is configured to make it easier to recognize by the difference in brightness from the ground, and it is very easy to recognize at night.

4A shows that the number "19" is displayed in reverse phase through the liquid crystal panel 40, and FIG. 4B shows that the number "0" is displayed in reverse phase through the liquid crystal panel 40. FIG.

The traffic lights according to the present invention can be applied to horizontal dichroic lights, horizontal tricolor lights, vertical tricolor lights, vertical four color lights, etc. in addition to horizontal four-color lights and vertical two-color lights, and can be applied to variable lights, warning lights, and walking lights.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2A to 2D, when a lighting signal is applied to the corresponding traffic light, only the liquid crystal panel 40 of the traffic light is turned “OFF” while transmitting the light emitted from the backlight panel 30. To be turned on, and the remaining traffic lights are turned “ON” to block the light of the backlight panel 30 so as to be turned off.

That is, when the liquid crystal panel 40 is turned into an "ON" state and is in an opaque state, it blocks the transmission of sunlight from the outside and absorbs most of the liquid crystal panel 40 in the opaque state, thereby turning on a signal lamp that is turned on. Will make the distinction of.

In addition, since the liquid crystal panel 40, such as a signal lamp in a lit state, becomes transparent, even if sunlight passes through the transparent liquid crystal panel 40, the color film 50 or the backlight panel 30 is provided. Since the reflection is reflected by the reflector, the result is an increase in the amount of light of the traffic light, so that the lit traffic light appears brighter.

In the above state, the light emitted from the backlight panel 30 passes through the color film 50 positioned between the liquid crystal panel 40 and the backlight panel 30 to have a unique color (red, yellow, green). Then, the transparent polycarbonate plate 60 is visible through.

In this process, the convex portion formed in the polycarbonate plate 60 serves to see the lighting state of the traffic light in the lateral direction by scattering light to the side, and protects the liquid crystal panel 40 from rain, snow or hail. It will play a role.

On the other hand, when the traffic light according to the present invention as shown in the accompanying drawings, Figure 2a to 2d is applied to the horizontal four-way light (vehicle traffic lights), first, the process of turning on the red light 70 is shown in Figure 2a The liquid crystal panel 40 provided in the yellow light 72, the direction light 74, and the green light 76 is turned “ON” while being turned off by blocking the light of the backlight panel 30. In the first red light 70 only in the liquid crystal panel 40 is installed in the "OFF" state is transmitted through the light emitted from the backlight panel 30 is turned on.

In addition, as the yellow light 72 is turned on, as shown in FIG. 2B, the liquid crystal panel 40 provided in the red light 70, the turn indicator 74, and the green light 76 is “ON”. The light is turned off by blocking the light of the backlight panel 30 while the liquid crystal panel 40 installed therein is turned off from the backlight panel 30. Through the emitted light, it is turned on.

In addition, as shown in FIG. 2C, the turn indicator 74 is turned on as the liquid crystal panel 40 provided in the red light 70, the yellow light 72, and the green light 76 is “ON”. The light is turned off by blocking the light of the backlight panel 30 while the liquid crystal panel 40 installed inside only the third direction indicator 74 from the left is turned “OFF” and the backlight panel 30 is turned off. The light emitted from the light penetrates into a lit state.

At this time, the light absorption background region 42 formed at the outer side of the liquid crystal panel 40 of the direction indicator 74 is always in an opaque state, and is located in the center of the light absorption background region 42 and has an arrow shape. Only the transmission pattern 44 is inverted to the "OFF" state through which the light emitted from the backlight panel 30 is transmitted.

In other words, the light absorption based region 42 is not always transmitted by the voltage is applied to the "ON" state.

In addition, the process in which the green light 76 is turned on is as shown in FIG. The light is turned off by blocking the light of the backlight panel 30 while the liquid crystal panel 40 installed therein is turned off from the backlight panel 30. Through the emitted light, it is turned on.

At this time, only one signal light among the red light 70, the yellow light 72, the turn signal 74, and the green light 76 is in a lighting state that transmits light, and the remaining traffic lights do not transmit light. The light is turned off, and the contrasting light makes it possible to reliably distinguish a lit traffic light from a long distance.

On the other hand, as shown in Figures 3a and 3b of the accompanying drawings when the traffic light according to the present invention is applied to a vertical dichroic light (pedestrian traffic light), first, the process of turning on the red light 80 is shown in Figure 3a As described above, the liquid crystal panel 40 provided in the lower green lamp 82 is turned “ON” and is turned off by blocking the light of the backlight panel 30, and the liquid crystal panel installed in the upper red lamp 80. 40 is in the " OFF " state to transmit the light emitted from the backlight panel 30 to be in the lit state.

That is, the light transmission background region 46a formed outside the liquid crystal panel 40 of the red lamp 80 is inverted to the " OFF " state to transmit light emitted from the backlight panel 30, thereby turning on the liquid crystal panel. The light blocking pattern 48a having the shape of a granular pattern formed at the center is maintained in an opaque state at all times to block the light emitted from the backlight panel 30 from being transmitted to maintain a dark state.

In addition, the process of turning on the green light 82 turns off the light of the backlight panel 30 while the liquid crystal panel 40 provided in the upper red light 80 is turned “ON” as shown in FIG. 3B. As a result, the light is turned off, and the liquid crystal panel 40 installed inside the green light 82 at the lower side is turned “OFF” to transmit light emitted from the backlight panel 30 to be turned on.

That is, the light transmission background region 46b formed outside the liquid crystal panel 40 of the green lamp 82 is inverted to the "OFF" state to transmit light emitted from the backlight panel 30 to be in a lit state. The light blocking pattern 48b having a walking pattern shape formed at the center is maintained at an opaque state at all times to block the light emitted from the backlight panel 30 from being transmitted, thereby maintaining a dark state.

In addition, the traffic light according to the present invention is inverted to the "ON" state when the light is turned off, as well as blocking the light of the backlight panel 30 installed therein, as well as blocking the light transmitted from the outside, such as sunlight. Therefore, the phantom phenomenon can be prevented, and there is no need to install a shading shade.

As shown in FIGS. 4A and 4B, the current remaining time of the crosswalk passage time may be displayed as a number (for example, 19 seconds to 0 seconds) through the liquid crystal panel 40. When the control code is input to 40), the portion to be turned on in the 7-segment reverse phase display pattern 90 or the 2-segment reverse phase display pattern 92 on the liquid crystal panel 40 is turned "OFF" to be inverted to a transparent state. And the remaining 7-segment reverse display pattern 90 or 2-segment reverse display pattern 92 and the base portion are turned "ON" to remain opaque and emit light emitted from the backlight panel 30. Only the inverted 7-segment reverse display pattern 90 or the 2-segment reverse display pattern 92 is visible, and the light is not easily transmitted due to the difference in brightness from the background. .

That is, as shown in FIG. 4A, the device counts down by one second from the number “19” displayed through the liquid crystal panel 40, and as shown in FIG. 4B, the number “0” is displayed at the end so that the transverse walk time is increased. You will be notified that it is finished.

At this time, the person who is crossing the crosswalk or who is about to cross the crosswalk can easily see how much time is left in the current crosswalk, so that safety accidents can be prevented.

As described above, the present invention is because the liquid crystal panel is switched to a transparent state only when the traffic light is turned on, so when the sunlight is in front of the traffic light during the day, some of the color film at the rear thereof passes through the transparent liquid crystal panel. It is reflected from the surface, and the other part is transmitted through the color film and reflected by the reflector provided in the backlight (when the backlight panel is provided). Instead, the sunlight is piggybacked by the light emitted from the backlight. The synergistic effect is to reduce the power consumption caused by the backlight and to receive the help of natural light without power consumption.

In addition, when the traffic light is turned off, the liquid crystal panel is kept in an opaque state, so when sunlight is in front of the traffic light during the day, sunlight does not penetrate the liquid crystal panel, and most of it is absorbed by the opaque liquid crystal panel surface and appears black. Therefore, it is easy to discriminate from the lit traffic light, thereby improving the discriminating power of the traffic light.

This is because the distinction between the lit signal and the unlit signal lamp is clearly distinguished even if the shading shade, which was previously installed to block sunlight from the traffic light, is removed from the present invention, thus preventing the phantom phenomenon. have.

In addition, when applied to a signal lamp made of a conventional halogen lamp, without the separate backlight, take off the diffusion lens of the existing signal lamp and install the color film and the liquid crystal panel of the present invention in front of the halogen lamp, the existing halogen lamp and reflector Since it can be reused, resources can be recycled and the budget can be saved. Furthermore, when the signal light is turned off, the liquid crystal panel becomes opaque, so that sunlight or ambient light does not penetrate the liquid crystal panel. There is an effect that can eliminate the worry that can be reflected in the reflector installed inside.

In addition, since the shading shade for blocking the sun rays can be excluded, contaminants such as dust or dust adsorbed on the surface of the polycarbonate plate are naturally washed by rain water, thereby greatly reducing maintenance costs. Compared with conventional halogen lamps, the service life (half-permanent, CCFL is about 50,000 hours when the backlight panel is a high-brightness LED) can be greatly extended, and the structure is simple and easy to manufacture. Since the voltage is used, power [about 5 watts] can be greatly reduced, and an electric shock can be prevented in case of a short circuit.

Claims (3)

A backlight panel 30 installed at an inner rear of the traffic light case 20; A liquid crystal panel 40 positioned in front of the backlight panel 30 and inverted when a lighting signal is applied to transmit light emitted from the backlight panel 30; A color film 50 interposed between the liquid crystal panel 40 and the backlight panel 30 to transmit the light emitted from the backlight panel 30 to the liquid crystal panel 40; Reverse phase traffic light having a backlight liquid crystal display (LCD), which is provided on the front surface of the liquid crystal panel 40 and is composed of a polycarbonate plate 60 for protecting the liquid crystal, the center of which is convex outwardly. . The liquid crystal panel (40) according to claim 1, wherein the liquid crystal panel (40) is positioned at the center of the light absorption background region (42) which is always kept in an opaque state on the outside thereof, Reverse phase display traffic signal having a backlight liquid crystal display (LCD), characterized in that when applied is inverted and the transmission pattern 44 of a predetermined shape for transmitting the light emitted from the backlight panel (30). The liquid crystal panel of claim 1, wherein the liquid crystal panel 40 is inverted when a lighting signal is applied to transmit the light emitted from the backlight panel 30. Light blocking patterns 46a and 46b, and light blocking patterns 48a and 48b having a predetermined shape, which are located at the center of the light transmitting background areas 46a and 46b and are kept in an opaque state at all times, Reverse phase traffic light having a backlight liquid crystal display (LCD), characterized in that formed.