KR100540689B1 - On Screen Display System by using Rear Project Screen and Projector - Google Patents

Abstract

The present invention relates to a character display system using a projector and a rear projection screen for providing safe driving by providing character data information to a driver of a rear vehicle between a driving vehicle and a rear vehicle.

The system is attached to one or more sensors on one side of the rear of the vehicle, the detector 100 for detecting the light brightness (glare) of the rear vehicle at the vehicle distance and night driving, and a plurality of button switches on one side of the handle, An operation unit 110 for selectively outputting various character data information according to a driver's arbitrary operation, a multiplexer (MUX) 120 which detects input signals of the detector and the operation unit with priority and outputs them to the system control unit 130, A data memory 140 and an OSD processing unit 150 for storing and outputting predetermined character data information to display various character data information on the screen by the control unit, and driving the projector according to the command of the control unit A projector driving control unit 160 and a small projector 170 for projecting data information onto a screen, and receiving character data information of the projector Integrated rear projection screen 180 for directing characters to the rear of the screen, and interface unit 210 for easily connecting and connecting external devices by receiving input signals of the detector and the control unit and providing text data information related to vehicle safety. Characterized in that it comprises a system control unit 130 for controlling.

Detector, MUX, Mini Projector, Rear Projection Screen

Description

On Screen Display System by using Rear Project Screen and Projector}

1 is a block diagram showing an embodiment of a conventional character display system for a vehicle

Figure 2 is a block diagram showing an embodiment of a character display system using a projector and a rear projection screen of the present invention

Figure 3 is a block diagram showing an embodiment of a projector of the character display system using a projector and a rear projection screen of the present invention

Figure 4 is a block diagram showing an embodiment of the rear projection screen of the character display system using the projector and the rear projection screen of the present invention

Figure 5 is a block diagram showing an embodiment in which the character display system using the projector and the rear projection screen of the present invention installed on the rear window of the vehicle

Figure 6 is a block diagram showing an embodiment in which the character display system using the projector and the rear projection screen of the present invention moved to the vehicle front windshield

※ Explanation of codes for main parts of drawing

100: detector 100a ~ 100e: distance / luminance detection sensor

110: operation unit 120: multiplexer (MUX)

130: system control unit 140: data memory

150: OSD processing unit 160: projector driving control unit

170: small projector 180: rear projection screen

190: audio processor 200: speaker

210: interface 220: transceiver

230: GPS 240: camera

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character display system for a vehicle, and in particular, it uses a rear projection screen which receives a projection image from a small video projector (e.g., a projector) from the rear and reproduces the projection image on the observer side of the front of the opposite side The present invention relates to a character display system using a projector and a rear projection screen for providing safe driving by providing character data information to a driver of a rear vehicle between a vehicle in front and a rear vehicle.

In general, as shown in FIG. 1, a character display system for a vehicle is known from Korean Patent Publication No. 193-0005850, and the driving situation of the front vehicle between the front vehicle and the rear vehicle when the vehicle is driven is rear vehicle. In order to inform the driver of the driver, there is a character display device which is connected to the brake and outputs a corresponding character such as an emergency warning, troubleshooting, and left / right direction switching by the address latch only by the driver manual operation switch.

In addition, in the U.S. Open Utility Model Publication (U) Office 2000-0003290, when the driver presses the operation button, the wireless signal is sent to the rear display part by aligning the letter display words stored in the MICOM program to the rear display unit, and using the binary LED lighting method. Characters and figures are lit on the display.

All of these methods are binary lighting methods using matrix light emitting diodes (LEDs), which are expensive to install in large-sized display screens.In bright light such as sunlight, the viewer (rear vehicle driver) can see the reflection or external light on the glass surface. It can't resist the intensity and can't display clear text with low contrast.

In addition, it is not the automatic character display method by the detector but only the button switch method by the driver's manual operation, so the driver does not detect the room mirror or the rear mirror of the vehicle, If you overlook the situation, there is a problem that can not provide information to the rear vehicle driver.

The present invention has been devised to solve the problems of the conventional character display system as described above. The object of the present invention is to provide a driver of a rear vehicle with text data information between a driving vehicle and a rear vehicle to promote safe driving. The present invention provides a character display system using a projector and a rear projection screen.

In the character display system of the present invention for achieving the above object, as shown in FIGS. 2 and 6, the system is attached to one or more sensors on one side of the rear of the vehicle, the front vehicle and the rear vehicle when driving A sensor 100 having a distance sensor for detecting a safety distance between the vehicle and a luminance sensor for detecting glare (brightness) of a headlight or an uplight of a rear vehicle traveling near a front vehicle due to a traffic jam at night, and a steering wheel While installing a plurality of button switches on the side, the operation unit 110 for selecting and outputting the desired text data information by the driver's arbitrary operation, and the input signal of the detector and the operation unit to detect the priority to the system control unit 130 A multiplexer (MUX) 120 for outputting and predetermined characters for displaying various character data information according to a command of the controller; A data memory 140 and an OSD processing unit 150 for storing and outputting data information, a projector driving control unit 160 for controlling driving of the projector according to a command of the controller, and projecting various character data information onto a screen; Projector 170, a rear projection screen 180 for projecting the character data information from the projector to the front of the screen to direct the character data on the back of the screen, and the character data information related to vehicle safety by receiving input signals from the detector and the operation unit It is easy to provide a rear vehicle driver, and characterized in that the system control unit 130 for controlling the interface unit 210 for connecting and connecting external devices.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached FIGS. 2 to 6. First, FIG. 2 is an embodiment of a character display system using a projector and a rear projection screen of the present invention. As a block diagram showing the configuration means, the configuration means is a detector 100, an operation unit 110, a multiplexer (MUX; Multiplexer) (120), a system control unit 130, a data memory 140, an OSD processing unit 150, The projector driving control unit 160 and the small projector 170, the rear projection screen 180, the audio processing unit 190 and the speaker 200, the interface unit 210, and connected through the interface unit 210 The external device is configured to further include a transceiver 220, GPS 230, digital camera 240 and the like.

The detector 100 is attached to one side of the rear of the vehicle with one or more sensors, the distance detection sensor (100a ~ 100c) for detecting a safety distance between the front vehicle and the rear vehicle during driving and the rear following the front vehicle during night driving Luminance sensor (100d ~ 100e) for detecting the glare (brightness) of the headlights and the uplight of the vehicle is provided.

As a means for detecting a safety distance between the front vehicle and the rear vehicle, an infrared detection method for detecting engine heat (temperature) of a known vehicle in close proximity, an image detection method using a camera, and ultrasonic waves are reflected and returned from the subject. It consists of selecting and applying any one of the ultrasonic sensing methods using the Doppler effect to detect the incoming signal.

In addition, to detect the glare (brightness) of the headlights and the uplight of the rear vehicle, as a phototransistor (Photo-NPN), a lens and a transistor that amplifies the current generated by the light can be used as a sensor. This sensor is used when the light is increased according to the brightness of the headlight or the uplight of the SUV vehicle or the rear vehicle (large vehicle) such as a bus or truck that closely follows the front vehicle (small) due to the traffic jam at night. When the resistance value is small, while the illuminance is low, the resistance value is increased so that one or more sensors are installed as shown in FIG. 5 (100e, 100d) in order to detect a data value that changes according to the increase or decrease of the voltage and current.

The operation unit 110, with reference to FIG. 2 and FIG. 3, a plurality of button switches on the one side of the vehicle steering wheel configuration, the safety operation related button switch to selectively output various character data information by the driver's arbitrary operation Emergency warning button switch 110b for notifying an external driver, etc. of an emergency occurring suddenly while driving and P (Pan) -T (Tilt) -F (Focus) -Z of the small projector 170. Projector drive control button switch 110c for driving control (Zoom) function and the mode switching button switch (110d) to allow the driver to arbitrarily select and connect the external device connected via the interface unit 210.

The safety driving related button switch 110a is installed on one side of the handle so that the driver can arbitrarily select and operate according to the driving situation detected by the rearview mirror or the rearview mirror regardless of the control signal detected by the detector 100. It is done.

By operating the button button (110a) related to the safe driving, "Safe distance maintenance (1 time)", "Crash hazard (2 times)", "Because it is snowing, please turn off the headlight (or high light) for a while. Thank you Can be configured such that the driver arbitrarily selects and outputs a safety phrase according to the vehicle driving.

In addition, the emergency alarm button switch (110b), "in the vehicle trouble repair (one time), the display of the rescue request (two times) according to the emergency occurrence, etc., the external device connected to the interface unit 210 It can be implemented in conjunction with and can be configured to cope with any accident during driving.

In addition, the projector driving control button switch 110c is a P (Pan) -T (Tilt) -F (Focus) -Z (Zoom) function of the small projector 170 which is driven and controlled by the projector driving control unit 160. Driver operation switching means to perform the operation, the operation method can be configured in the same manner as the operation function of the switches (110a, 110b).

In addition, the mode switch button switch 110d, the signal output from the transceiver 220, GPS 230, the digital camera 240, and the like connected via the interface unit 210 to the small projector 170 Switch mode for input.

The functions of the operation units 110a to 110d read the corresponding characters through the data memory 140 and the OSD processing unit, and output them to the projector driving control unit 170.

The multiplexer (MUX) 120 is a selection circuit means for detecting input signals from the detector 100 and the operation unit 110 in priority order by address assignment and outputting them to the system control unit 130. Select the required data from the line and export it to one output line.

In order to easily provide the character data information related to the safety of the driving vehicle to the rear vehicle driver by receiving the input signal output from the system control unit 130 and the MUX 120, the character display system of the present invention will be described later. Control means for controlling each component, and also controls the integrated control unit interface unit 210 for connecting and connecting external devices.

The data memory 140 and the OSD processing unit 150 may transmit corresponding character or figure data information to the rear projection screen by a command of the system controller 130 according to signal detection of the detector 100 and the operation unit 110. It is means for storing predetermined data information for projecting and directing to the projector 180, and outputting the predetermined data information to the projector driving control unit 160.

The projector driving control unit 160 and the small projector 170 are the small projector 170 according to the command of the system controller 130 by the detection signal of the detector (100a ~ 100e) or the input signal of the operation unit (110c). Drive control and process the corresponding character data information through the small projector 170 to project onto the rear projection screen (180).

In the present invention, the projector driving control unit 160, P (Pan) -T (of the small projector 170 according to the command of the projector driving control button switch 110 c and the system control unit 130 of the operation unit 110 ( Tilt) -F (Focus) -Z (Zoom) function, and outputs the drive character to be projected on the screen input from the OSD processing unit 150 to the small projector 170.

In more detail with reference to FIGS. 2 and 3, the projector driving control unit 160 and the small projector 170 are installed to be mounted in the vehicle ceiling predetermined unit 260, and the projector is driven up and down. Up and down driving support part 171 to support and support the projector, a projection mirror 172 for projecting an optical image on the screen, and a projector rotation switch 173 for rotating the compact projector 170 180 degrees in front and rear of the vehicle. It is composed of a semi-circular dome-shaped protective cover 174 attached to the government and protects the small projector 170.

The rear projection screen 180 is a means for projecting the light source information to be projected on the front surface of the screen from the projection mirror 172 of the small projector 170 to produce an image on the rear of the screen. In detail, the rear projection screen 180 may include a plurality of triangular cross-sections attached to a transparent plate (transparent acrylic plate) 181 and a front surface that is the viewer 182 side of the vehicle rear windshield 250 '. A front transparent sheet 183 made of a lenticular lens having minute ribs and a rear surface which is an image projection side 184 of the transparent plate 181 are attached to face the front transparent sheet. It consists of fixing members 186a to 186n for fixing the rear projection screen 180 made of the wide-angle light diffusing sheet 185 to the rear rear window 250 'side.

Such a rear projection screen 180 is known from US Pat. No. 4,432,010 and has recently been widely used in video projection devices and the like. In particular, the lenticular rear projection screen method is a technique that improves the problems of the conventional LED method known and disclosed in PCT / JP2002-00144 of Arisa and Optics Co., Ltd., Japan.

The rear projection screen 180 employing the lenticular method as described above can obtain a black level high-definition color image with almost no reflective reflection on the surface of the screen at the observer 182 even under bright light.

In addition, since the screen of the large screen can be configured at a low price, the present invention intends to provide safe character data information by providing a screen to the driver of the rear vehicle by installing the screen on the rear window of the vehicle by using such a feature. have.

Meanwhile, referring to FIG. 2, the audio processor 190 and the speaker 200 receive input signals from the detector 100 and the operation unit 110 and output corresponding character data information to the rear projection screen 180. In addition, it is a warning sound generating means for outputting a separate warning sound if necessary.

In addition, the interface unit 210, the character display system using the small projector 170 and the rear projection screen 180 of the present invention and the external device transceiver 220, GPS 230 and the digital camera 240, etc. RS485 bidirectional communication connector is used as the interface means for connection.

In addition, as shown in Figures 3 and 5, in the present invention, the system control unit 130 is installed at the bottom of the vehicle seat, the small projector 170 is installed inside the vehicle ceiling and the sensor sensor is installed on one side of the rear of the vehicle ( 100a to 100e)) and the like according to the implementation means of the present invention it will be obvious that the connection connection by the RS232 one-way communication connector.

On the other hand, Figure 5 is a fixed projection of the rear projection screen 180 on the inner surface of the vehicle rear windshield 250 'for the character display system using the rear projection screen of the present invention to produce the character data information according to the driving situation Figure 1 shows an embodiment.

To describe this in more detail, a small space is built in the ceiling part 260 of the vehicle, so that the small projector 170 is built in, and the rear projection screen 180 is provided on the inner side of the rear window 250 'of the vehicle. The screen fixing members 186a to 186n and the auxiliary fixing members 186'a to 186'n are fixed to each other to project and direct various character data information according to the driving situation.

In the present invention, the rear projection screen 180 is fixedly attached to the inner surface of the vehicle rear windshield 250 'by the fixing members 186a to 186n and the auxiliary fixing members 186'a to 186'n, while the vehicle trunk is fixed. A separate drive motor (not shown) or a hydraulic device (not shown) is provided therein to be installed at a predetermined portion of the rear window glass shelf of the vehicle, and the driver can be installed by the driver operation unit 110 button switch.

Meanwhile, FIG. 6 is a diagram illustrating an embodiment in which a character display system using a rear transmissive screen of the present invention is installed on a vehicle front windshield, and the rear projection screen 180 is fixed to the front windshield 250 of the vehicle. The members 186a to 186n and the screen auxiliary fixing members 186'a to 186'n are configured to be variably installed.

In such a configuration, since the broadcast signal received through the TV receiving antenna 270 is processed by the video processing unit (not shown) to project an image or to project the signal input through the interface unit 210. It has characteristics that can be utilized in leisure culture such as camping grounds.

Hereinafter, the effects of the present invention will be described in more detail with reference to FIGS. 2 to 5, as shown in FIGS. 2 and 5, one or more detection sensors are attached to one rear side of the vehicle. In addition, the distance sensor (100a ~ 100c) for detecting the safety distance between the front vehicle and the rear vehicle when driving, and the luminance sensor for detecting the light glare (brightness) of the headlights or the uplight of the rear vehicle approaching the front vehicle due to the traffic jam at night ( The detector 100 having 100d to 100e and a plurality of button switches are provided on one side of the handle, and the signals of the operation unit 110 for selectively outputting desired text data information by the driver's arbitrary operation are outputted to the MUX 120. Detects.

The MUX 120 detects the input signals of the detector 100 and the operation unit 110 as priorities and outputs them to the system control unit 130. The system control unit 130 outputs the text data information corresponding to the input signal. The data memory unit 140 reads and instructs the OSD processing unit 150 to output the projector driving control unit 160.

On the other hand, the system controller 130 is a drive control signal to set the projection mirror 172 and the rear projection screen 180 of the small projector 170 from the driver operation unit 110 at the same time as the command to the OSD processing unit. Check P (Pan) -T (Tilt) -F (Focus) -Z (Zoom) and drive the small projector 170 built into the ceiling of the vehicle to project text data information onto the rear projection screen 180. .

In addition, the system controller 130 checks which input signal is present from the mode change switch 110d of the driver manipulation unit 110 to interface any one external device signal connected through the interface unit 210 to the The projector is directed to the rear projection screen 180 via the small projector 170 or controlled to perform a corresponding operation function.

It will be apparent to those skilled in the art that the present invention described above is capable of various substitutions, modifications, and alterations within the above-described embodiments and the appended ranges.

As described above, the present invention adopts the rear projection screen method, which improves the problems of the matrix LED method in the existing character display system, and enables the character display unit to be displayed on a large screen, thereby ensuring more visibility to the rear vehicle driver. It was designed to promote safe operation.

In addition, by attaching the distance sensor and the brightness sensor automatically outputs the character data information to the rear of the vehicle, the driving safety caused by the overlooked driver's operation has been increased. Leisure effects that can enjoy various video cultures by connecting devices are added.

Claims (11)

A text display system for providing text data information to a driver of a rear vehicle between a driving vehicle and a rear vehicle, The system is attached to one or more sensors on one side of the rear of the vehicle, the detector 100 for detecting the light brightness (glare) of the rear vehicle at the vehicle distance and night driving, A plurality of operation units 110 installed on one side of the vehicle handle and selectively outputting various character data information according to a driver's arbitrary operation; A MUX 120 which detects the input signals of the detector 100 and the operation unit 110 as priority and outputs them to the system controller 130; A data memory 140 and an OSD processing unit 150 for storing and outputting predetermined character data information for displaying various character data information on the screen by the controller; A signal is input by the detector 100 and the operation unit 110, and drives and controls the projector according to a control signal of the controller, and a projector driver control unit 160 and a small projector 170 for projecting various character data information onto a screen; , A rear projection screen 180 for directing character data information projected from the projector to the rear of the screen; The system control unit 130 receives the input signal from the detector 100 and the operation unit 110 to easily provide text data information related to the safe driving of the vehicle, and integrally control the interface unit 210 for connecting and connecting external devices. Character display system using a projector and a rear projection screen comprising a The rear projection screen 180 is variablely installed on the front windshield 250 of the vehicle by fixing members 186a to 186n and auxiliary fixing members 186'a to 186'n. Character display system using projector and rear projection screen The rear projection screen 180 is fixed to the rear windshield 250 'of the vehicle by fixing members 186a to 186n and auxiliary fixing members 186'a to 186'n. Character display system using projector and rear projection screen The projector of claim 1, wherein the rear projection screen 180 is mounted in a trunk of the vehicle and driven by a driver operating unit 110c and a driving motor or a hydraulic device to be installed at a predetermined portion of the rear window pane shelf. Display system using the projector and rear projection screen The projector of claim 1, wherein the small projector (170) is installed to be mounted in the in-vehicle ceiling predetermined unit (260), and is driven by the driver operating unit (110) and the projector driving control unit (160). Display system using the projector and rear projection screen The character display system using the projector and the rear projection screen according to claim 5, wherein the small projector (170) further includes a rotation switch (173) so as to be able to rotate 180 degrees in front and rear of the vehicle. The character display system using the projector and the rear projection screen according to claim 6, wherein the small projector (170) further includes an electric or hydraulic driving unit (171) to move up and down. The character display system according to claim 7, wherein the small projector 170 further includes a semicircular dome-shaped protective cover 174 that protects the small projector. The character display system according to claim 1, wherein the character display system further comprises an antenna 270 for receiving a TV on the ceiling of the vehicle 260. The interface unit 210 of claim 1, wherein the system controller 130 is installed at a lower portion of the driver's seat of the vehicle, and connects the transceiver 220, the GPS 230, the digital camera 240, and the like. Character display system using a projector and a rear projection screen, characterized in that it further comprises The system of claim 1, wherein the text display system receives input signals from the detector 100 and the operation unit 110, outputs corresponding text data information to the rear projection screen 180, and separates a beep sound when necessary. Character display system using a projector and a rear projection screen, characterized in that it further comprises an audio processing unit 190 and a speaker 200 which is a warning sound generating means for outputting

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