KR20150063857A

KR20150063857A - Curved display device

Info

Publication number: KR20150063857A
Application number: KR1020130148739A
Authority: KR
Inventors: 이종복
Original assignee: 현대자동차주식회사
Priority date: 2013-12-02
Filing date: 2013-12-02
Publication date: 2015-06-10

Abstract

A curved display device according to an exemplary embodiment of the present invention includes a curved screen, a camera that captures a curved screen, a projector that irradiates light according to a video signal to a curved screen by receiving a video signal, And a control unit for changing the value of the video signal corresponding to the coordinates according to the degree of discoloration and outputting the changed value to the projector.

Description

[0001] CURVED DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved display device, and more particularly, to a curved display device for accurately displaying the color of an image displayed by a curved display device.

As the functions of the vehicle are diversified and advanced, various input devices capable of inputting commands for various functions of the vehicle have been developed. Attempts have been made to apply touch screens to clusters of vehicles or AVN (Audio Video Navigation) to improve driver convenience.

Generally, in the case of a touch screen mounted on a vehicle, the space is not efficiently utilized because it is installed on the front of the driver's seat, and it is difficult to match with the curved design in the vehicle.

Since the curved display device is difficult to detect the touch input when compared with the conventional flat display device, a separate device for sensing the touch input of the user is required for efficient use of the curved display device. In order to meet such a demand, a technique of recognizing a touch of a user by using infrared rays has been conventionally used.

In order to support and enhance the function of such a curved display device, it may be considered to improve the structural and / or software parts of the curved display device.

The curved display device has a larger area exposed to direct sunlight or the like due to the three-dimensional shape of the curved display device, even when the same size image is displayed as compared with the conventional flat display device.

Therefore, there is a problem that a large area of the screen displaying the image of the curved display device is exposed to ultraviolet rays, direct sunlight or the like and discolored.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a curved display device for accurately displaying the color of an image displayed on a curved display device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, There will be.

According to an aspect of the present invention, there is provided a curved display device including a curved screen, a camera for photographing a curved screen, a projector for receiving a video signal and irradiating light according to a video signal to a curved screen, And a control unit for changing the value of the video signal corresponding to the coordinates according to the degree of discoloration and outputting the changed value to the projector .

The control unit can change the tone value of the video signal corresponding to the light irradiated in the coordinates of the curved screen.

The control unit can determine the degree of discoloration from the color difference between the color discrepancy area and the peripheral area of the discoloration area, and calculate the correction value from the color discrepancy, thereby changing the tone value.

The controller may generate a color fading detection video signal so that a notification window indicating that the color fading area is detected is displayed on the curved screen when the color fading area is detected.

The control unit may generate a color fading detection video signal such that an indicator indicating the fading degree or the fading area on the curved screen is displayed together with the notification window.

The curved screen may comprise an acrylic material.

The effect of the curved display device according to the present invention will be described as follows.

The curved display device according to the present invention has the effect of accurately displaying the color of a displayed image.

The curved display device according to the present invention has an effect of informing the user of discoloration of the curved screen.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a configuration diagram of a curved display device according to an embodiment of the present invention.
FIGS. 2 to 4 are exemplary views showing a curved screen of a curved display device in which a color fading area is detected according to an embodiment of the present invention.

Hereinafter, a curved display device according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

1 is a configuration diagram of a curved display device according to an embodiment of the present invention.

1, the curved display device may include a curved screen 10, a projector 20, an aspherical mirror 30, a reflective mirror 40, an RGB camera 60, a controller 70, have. The components shown in Fig. 1 are not essential, so that a curved display device having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The curved screen 10 can display an image. The curved screen 10 may comprise an acrylic plate and a rear projection film adhered to the acrylic plate. In order to install the curved screen 10 on the front portion of the vehicle, the outer edge of the curved screen 10 and the bezel are engaged to fix the bezel to the front portion of the vehicle.

The projector 20 is disposed behind the curved screen 10 and can project an image on the curved screen 10. [ The projector 20 may include, but is not limited to, a light source such as a lamp or an LED, a projection unit including a plurality of lenses for projecting an image onto a screen using a light source, and the like.

An aspherical mirror 30 and a reflection mirror 40 may be provided between the projector 20 and the curved screen 10. The aspherical mirror 30 reflects the image projected from the projector 20 and the reflecting mirror 40 can project the image reflected from the aspherical mirror 30 onto the curved screen 10. [

The RGB camera 60 can photograph the curved screen 10. The RGB camera 60 processes image frames such as still images or moving images obtained by the image sensor. The processed image frame can be output to the control unit 70. [

The control unit 70 can detect the discolored area of the curved screen 10 from the image frame output from the RGB camera 60. [ The controller 70 can detect the coordinates of a pixel having an RGB value out of a predetermined RGB value range as a color change area by using RGB values of a plurality of pixels included in an image frame.

The control unit 70 can determine the degree of discoloration of the discolored area according to the difference between the RGB values of the discolored area and the predetermined RGB value range. The control unit 70 may determine a discoloration degree by calculating a section corresponding to the difference value among a plurality of predetermined sections.

The control unit 70 can change the value of the video signal corresponding to the coordinates of the color-changing area according to the degree of discoloration and output the changed value to the projector 20. [ At this time, the tone value of the video signal can be changed in consideration of the tone value of the original video signal and the degree of discoloration of the curved screen 10.

The control unit 70 may determine the degree of discoloration from the difference between the RGB values of the peripheral region of the discolored area and the discolored area. At this time, the control unit 70 may calculate a value for correcting the tone value from the difference between the RGB values of the color change area and the surrounding area of the color change area, and change the tone value of the image signal corresponding to the color change area.

In addition, when the color-changing area is detected, the control unit 70 generates a color-change detection video signal including a notification window informing the user that a color-changing area is detected on the curved screen 10, an indicator indicating the degree of discoloration of the color- can do. Then, the projector 20 that has received the discoloration detection video signal can project the discoloration detection image to the curved screen 10.

Infrared rays 50 and 50 and infrared cameras 52 and 52 may be provided behind the curved screen 10 in order to sense the user's touch input to the curved screen 10. [ The infrared rays 50 and 50 can irradiate the infrared rays toward the curved screen 10 and can photograph the infrared rays reflected by the curved screen 10 using the infrared cameras 52 and 52. [ Then, the controller 70 analyzes the photographed infrared image and can detect a position and an area touched by the user.

Next, a method for changing the video signal corresponding to the color-changing area 80 by the curved display device will be described with reference to Fig.

FIGS. 2 to 4 are exemplary views showing a curved screen 10 of a curved display device in which a color fading area 80 according to an embodiment of the present invention is detected. As shown in FIG. 2, the curved screen 10 may be made of an acrylic material, and may be discolored as the external light source is irradiated.

Then, as shown in Fig. 3, the color change area 80 can be detected on the image displayed on the curved screen 10. [ 1, the control unit 70 detects the color change area 80 so that the user can not recognize the color change area 80 and can change the image signal according to the coordinates and the degree of discoloration of the color change area 80 have.

4, the control unit 70 includes an indicator 100 indicating the boundary between the color change area 80 and its peripheral area, a notification window 110 notifying that the color change area 80 is detected, The discoloration detection image including the notification window 120 may be displayed on the curved screen 10.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are illustrative and explanatory only and are intended to be illustrative of the invention and are not to be construed as limiting the scope of the invention as defined by the appended claims. It is not. Therefore, those skilled in the art can readily select and substitute it. Those skilled in the art will also appreciate that some of the components described herein can be omitted without degrading performance or adding components to improve performance. In addition, those skilled in the art may change the order of the method steps described herein depending on the process environment or equipment. Therefore, the scope of the present invention should be determined by the appended claims and equivalents thereof, not by the embodiments described.

10: Curved screen
20: Projector
30: Aspherical mirror
40: reflective mirror
50: Infrared lighting
52: Infrared camera
60: RGB camera
70:

Claims

Curved screen;
A camera for photographing the curved screen;
A projector for receiving a video signal and illuminating the curved screen with light according to the video signal; And
Detecting a color change area of the curved screen using an image photographed by the camera, determining coordinates of the color change area and a degree of discoloration, changing a value of the video signal corresponding to the coordinates according to the discoloration degree, A control unit for outputting the image data to a projector;
And the curved surface display device.

The method according to claim 1,
Wherein the control unit changes the tone value of the video signal corresponding to the light irradiated to the coordinates of the curved screen.

3. The method of claim 2,
Wherein the control unit determines the discoloration degree based on a color difference between the color change area and a surrounding area of the color change area and calculates a correction value from the color difference to change the tone value.

The method according to claim 1,
Wherein the control unit generates a color fading detection video signal such that a notification window indicating that the color fading area is detected is displayed on the curved screen when the color fading area is detected.

5. The method of claim 4,
Wherein the control unit generates the discoloration detection video signal so that an indicator for indicating the discoloration degree or the discoloration area is displayed together with the notification window on the curved screen.

The method according to claim 1,
Wherein the curved screen comprises an acrylic material.