KR20120129126A

KR20120129126A - Dual dispaly

Info

Publication number: KR20120129126A
Application number: KR1020110047189A
Authority: KR
Inventors: 서은성; 이세규
Original assignee: 엘지이노텍 주식회사
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-11-28

Abstract

Dual display according to an embodiment of the invention the light guide plate; A plurality of image light source units for injecting light into the light guide plate; A display unit formed on the light guide plate; And an optical separation unit disposed between the image light source unit and the display unit and separating the light emitted from the plurality of image light source units to each other.

Description

Dual display {DUAL DISPALY}

The present invention relates to a multiple-view directional display. Such a display can display a plurality of images at the same time, even when the display is viewed from different directions.

An observer looking at the display in one direction will see one image, and an observer looking at the display in the other direction will see a different, different image. The present invention relates to a dual display.

In-car navigation systems and in-car entertainment systems can be installed and used as accessories in the car. The display for this system is placed in or on top of the car dashboard.

Since the display is typically of a wide-viewing angle color liquid crystal type, both the front passenger and the driver can see the display. The display can be provided at any time to form part of the car's navigation system or part of the entertainment system.

Multi-visual directional displays may be included in the "bi-visual" display device. Dual-visual displays are similar in principle to auto-stereoscopic displays in that they display two or more images simultaneously while each image is displayed in a different direction.

Specifically, in an auto-stereoscopic display, two images are displayed as two components of a stereoscopic pair and only one observer can see each image with each eye, whereas in a dual-visual display the images are different. Displayed for viewing by observers and images cannot be connected to each other. The viewing windows produced by the dual-visual display are wide enough so that both eyes of the observer fit comfortably into the viewing window.

The dual-visual display can be installed in the dashboard of the vehicle. One image displayed on the dual-visual display may be a map, for example. It can also indicate the location of the car if the car is suitable for the GPS location system. This screen is visible to the driver of the vehicle.

Another image displayed by the dual-visual display may be an entertainment program such as a movie. This can be seen, for example, by the passenger in the front seat of the car. In particular, the application of dual-visual displays in automobiles is of increasing importance.

As shown in FIG. 1, in a vehicle equipped with a dual-visual display, for example, there may be a passenger 70 in the passenger seat or the rear seat of the vehicle in addition to the driver 50.

In the case of a car navigation and entertainment system, it is desirable for the driver 50 to see only the navigation information and the passenger 70 to see the entertainment only in consideration of safety, space and cost limitations. In other words, it is desirable for both passengers to be able to view different images from the same display.

In the conventional dual display, when a barrier method is used to separate an image into a left image and a right image, the resolution is reduced to half of the maximum resolution of the display.

That is, since the odd pixels in the horizontal pixel send the image to the driver 50, and the even pixels transmit the image to the passenger 70, the same pixels cannot be used at the same time. All 70s are viewed at half the maximum resolution.

In consideration of the fact that vehicle navigation is generally reproduced on a screen of 10 inches or less, the resolution reduction on a small screen may serve as a limiting factor for providing a clear image to a user.

According to the dual display of the present invention, the user can distinguish and enjoy both images with a clear screen without degrading the resolution.

According to an embodiment of the present invention, the driver may check the navigation information, and the passenger may separate and display the left and right images without reducing the resolution, such as watching a movie and news.

1 is a diagram illustrating a dual display device installed in an automobile.
2 and 3 are cross-sectional views illustrating an operation structure of a dual display according to an exemplary embodiment of the present invention.
4 is a graph illustrating an angle distribution of light emitted through a dual display according to an exemplary embodiment of the present invention.
5 is a graph illustrating an operating principle of a dual display according to an exemplary embodiment of the present invention.

In the description of the embodiment, when each component or the like is described as being formed "on" or "under", "on" and "under" are " Includes both directly and “indirectly” other components. In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

2 and 3 are cross-sectional views illustrating an operation structure of a dual display according to an exemplary embodiment of the present invention.

The display unit 100 according to the exemplary embodiment may include a first image light source 210 and a second image light source 220, a light guide plate 300, a light splitter 400, and a display 500.

The first image light source unit 210 and the second image light source unit 220 may be disposed on the side surface of the light guide plate 300, but the formation position is not limited thereto. A light emitting diode (LED) may be used as the first image light source 210 and the second image light source 220, and light may be injected into the light guide plate 300. Light may be incident on the front surface of the display 500 by the first and second image light source units 210 and 220 and the light guide plate 300.

Unevenness 310 may be formed on a bottom surface of the light guide plate 300. The unevenness 310 serves to uniformly reflect the light emitted from the first and second image light source units 210 and 220 to the light splitter 400.

The unevenness 310 may be uniformly formed in a predetermined pattern, or may be densely formed toward the central region of the light guide plate 300.

In the embodiment, the concave-convex 310 is formed in a pyramid shape that becomes narrower toward the top, but may be formed in a hemispherical shape, but is not limited thereto.

An angle α between the inclined surface of the uneven surface 310 and the upper surface of the light guide plate 300 may be formed to have a value of 90 degrees or less.

The light splitter 400 may be formed on the light guide plate 300. The optical separator 400 may include polycarbonate, and may be formed by injection.

The light reflected upward by the light guide plate 300 is incident on the light splitter 400, and the light splitter 400 adjusts the incident light at a predetermined angle to refracted the display 500. do.

That is, the light incident from the first image light source unit 210 is refracted at an angle α for viewing the first image, and the light incident from the second image light source unit 220 can watch the second image. It is refracted at an angle β. The angles α and β can be appropriately changed by the operation means.

In this case, when the first image light source unit 210 operates, the second image light source unit 220 does not operate. On the contrary, when the second image light source unit 220 operates, the first image light source unit 210 operates. it does not work.

When the first image light source unit 210 operates, the display 500 outputs an image corresponding to the first image, and when the second image light source unit 220 operates, the display 500 outputs a second image. The light source unit and the display operate at the same frequency to output an image corresponding to the image.

Accordingly, the direction of the light reflected by the light splitter 400 is changed. In this way, by alternately turning on and off the first and second image light source units 210 and 220 irrespective of the pixel, the dual image can be displayed on one display without degrading the resolution.

4 is a graph illustrating an angle distribution of light emitted through a dual display according to an exemplary embodiment of the present invention. 1 and 4, the angle at which the driver 50 views the display unit 100 and the angle at which the passenger 70 views the display unit 100 are different.

That is, since the first image should be seen only by the driver 50, the light should be almost not emitted at angles other than the driver's seat. In addition, since the second image should be shown only to the passenger 70 except for the driver 50, the light angle distribution should be concentrated in other parts except the position of the driver 50.

Since the driver's seat is concentrated on one side, the cutoff angle of the first image and the second image should be considerably biased to one side rather than 0 °.

In consideration of this, as shown in FIGS. 2 and 3, the protrusion 410 of the light separation unit 400 is not formed at a right and left uniform angle like the unevenness 31 of the light guide plate 300, and is biased to one side. Will be formed. Accordingly, the light is refracted at an angle α at which the first image can be viewed toward the driver 50 gathered on one side, and the angle β at which the second image can be viewed toward the passenger 70 in other regions. Will be refracted.

The projections 410 of the optical separation unit 400 may be formed at the same angle in all regions, and may be formed so that the angles change as they move away from the first and second light source units 210 and 220. That is, the angle formed by the first refraction surface 411, which refracts the light of the first light source unit 210 in the protrusion 410, with the top surface of the light guide plate 300, is the second light source unit in the region adjacent to the first light source unit 210. To 220).

Similarly, the angle formed by the second refracting surface 412, which refracts the light of the second light source 220 in the protrusion 410, with the top surface of the light guide plate 300 is the first light source in the region adjacent to the second light source 220. And to decrease toward 210.

5 is a graph illustrating an operating principle of a dual display according to an exemplary embodiment of the present invention. An operation period of the first and second image light source units 210 and 220 may be 120 Hz, for example. That is, while the first image light source unit 210 is operated for 1/120 second, the second image light source unit 220 is off, and then while the second image light source unit 220 is operated for 1/120 second. The first image light source unit 210 is turned off.

When the first image light source unit 210 is on, the second image light source unit 220 is turned off so that the navigation image is displayed on the display 500 so that only the driver 50 can view the second image light source unit. When 220 is on, the first image light source 210 is turned off so that another image (eg, a movie) is displayed on the display 500 so that only the passenger 70 can be watched.

The sound corresponding to the first image information for the driver and the sound corresponding to the second image information for the passenger can be output simultaneously or selectively according to a user's preference. Can be connected.

As discussed above, the driver 50 and the passenger 70 each display a clear screen without degradation of the resolution at 60 Hz by the process of alternately turning on and off the first and second image light sources 210 and 220 at 120 Hz. You can appreciate it.

In addition, the features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in each embodiment may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

Light guide plate;
A plurality of image light source units for injecting light into the light guide plate;
A display unit formed on the light guide plate; And
And a light separation unit disposed between the image light source unit and the display unit and separating the light emitted from the plurality of image light source units to each other.

The method of claim 1,
The light guide plate is a dual display in which unevenness is formed.

The method of claim 2,
The optical splitter is a dual display that is formed with a projection on the surface.

The method of claim 1,
The plurality of image light source units are formed on both side surfaces of the light guide plate.

The method of claim 3,
Dual display of the left and right inclined side of the protrusion is formed differently.

The method of claim 3,
The optical splitter is a dual display formed of polycarbonate.

The method of claim 1,
Displaying a first image along a first direction by the optical separation unit, displaying a second image along a second direction different from the first direction,
Dual display including a sound control unit for selectively outputting the sound corresponding to the first image and the second image.

The method of claim 3,
The angle at which the surface reflecting the light of the first light source unit with the upper surface of the light guide plate decreases toward the second light source in an area adjacent to the first light source, and the surface reflecting the light of the second light source at the protrusion is The dual display formed with an upper surface of the light guide plate is formed to decrease toward the first light source from an area adjacent to the second light source.

9. The method of claim 8,
The irregularities are densely formed toward the central area of the light guide plate.