KR102651806B1 - Display panel and multi-layer display device including the same - Google Patents

Abstract

An example of the present invention relates to a display panel that can accurately implement floating images and background images and is free from moiré phenomenon, and a multilayer display device including the same. The first display member according to an example of the present invention is provided with first patterns that display a first image. In one example of the present invention, a multi-layer display can be implemented with one display panel. Accordingly, the multilayer display device according to an example of the present invention does not cause moiré phenomenon or resolution degradation problems and has little luminance degradation. Additionally, the multilayer display device according to an example of the present invention can reduce costs compared to a stacked multilayer display structure. In addition, the multilayer display device according to an example of the present invention can implement a three-dimensional effect through the thickness of the light guide plate, so a separate gap glass is not required, and a slim design can be implemented compared to the stacked multilayer display structure.

Description

Display panel and multi-layer display device including the same {DISPLAY PANEL AND MULTI-LAYER DISPLAY DEVICE INCLUDING THE SAME}

One example of the present invention relates to a display panel and a multilayer display device including the same.

As we have recently entered the information age, the display field that displays video information has developed rapidly. In response to this, a variety of display devices have been developed and are receiving attention. Display device-related technologies relate to thinning, lightweighting, and reducing power consumption of display devices. As related technologies develop, the application fields of display devices continue to increase, and they are used as a user interface in most electronic devices and mobile devices.

Recently, a multi-layer display (MLD) structure has been developed as a technology for displaying three-dimensional images. One example of a multi-layer display structure is a multi-layer display structure with a stacked structure consisting of a front display panel and a rear display panel.

A multi-layer display structure with a stacked structure can express a three-dimensional effect by stacking two display panels to select and display images with different depth information. The image displayed on the front display panel is viewed as an image located at a relatively close distance, and the image displayed on the rear display panel is viewed as an image located at a relatively long distance. Accordingly, a floating image can be implemented with the front display panel, and a background image can be implemented with the rear display panel.

However, it is difficult to implement an accurate image between the front and rear display panels in the same area. When a black image is implemented on the front display panel, the image cannot be displayed on the rear display panel in the same area. When the front display panel and the rear display panel implement images of different colors, accurate expression does not occur due to color interference. The moire phenomenon occurs due to interference between the pixels of the front display panel and the pixels of the rear display panel.

Additionally, an upper polarizer and a lower polarizer are attached to the front display panel, and a lower polarizer is attached to the rear display panel. Accordingly, the light emitted from the back light unit on the back of the rear display unit passes through the three polarizing plates. Accordingly, the luminance of the rear display unit is lowered.

An example of the present invention is to provide a display panel that can accurately implement floating images and background images and is free from moiré phenomenon, and a multi-layer display device including the same.

A display panel according to an example of the present invention includes a first display member that displays a first image, a second display member that is disposed in front of the first display member and displays a second image, and a second display member that is disposed on the rear side of the first display member. Includes a light blocking member. The first display member according to an example of the present invention is provided with first patterns that display a first image.

A multilayer display device according to an example of the present invention includes a display panel according to an example of the present invention and a panel driver that drives the display panel.

In one example of the present invention, a multi-layer display can be implemented with one display panel. Accordingly, the multilayer display device according to an example of the present invention does not cause moiré phenomenon or resolution degradation problems and has little luminance degradation. Additionally, the multilayer display device according to an example of the present invention can reduce costs compared to a stacked multilayer display structure. In addition, the multilayer display device according to an example of the present invention can implement a three-dimensional effect through the thickness of the light guide plate, so a separate gap glass is not required, and a slim design can be implemented compared to the stacked multilayer display structure.

Figure 1 is a plan view showing a display panel according to an example of the present invention displaying a first image.
Figure 2 is a plan view showing a display panel according to an example of the present invention displaying a second image.
Figure 3 is a perspective view showing a display panel according to an example of the present invention that displays a three-dimensional image by combining a first image and a second image.
Figure 4 is a cross-sectional view of a display panel according to an example of the present invention.
Figure 5 is a cross-sectional view of a display panel according to another example of the present invention.
Figure 6 is an example diagram showing a display panel according to an example of the present invention displaying a first image.
Figure 7 is an example diagram showing a display panel according to an example of the present invention displaying a second image.
Figure 8 is a perspective view showing a display panel according to an example of the present invention displaying an image combining a first image and a second image.
Figure 9 is an exemplary diagram showing a method of manufacturing a first display member according to an example of the present invention.
Figure 10 is a plan view showing a first pattern on a first display member according to an example of the present invention.
Figure 11 is a block diagram showing a multi-layer display device according to an example of the present invention.

The advantages and features of the present application and methods for achieving them will become clear by referring to examples described in detail below along with the accompanying drawings. However, the present application is not limited to the examples disclosed below and will be implemented in various different forms, and only the examples of the present application are intended to ensure that the disclosure of the present application is complete and are within the scope of common knowledge in the technical field to which this application pertains. It is provided to fully inform those who have the scope of the invention, and this application is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are illustrative, and the present application is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present application, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the present application, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. In cases where a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present application.

“First horizontal axis direction”, “second horizontal axis direction” and “vertical axis direction” should not be interpreted as only geometric relationships in which the relationship between each other is vertical, and the scope in which the configuration of the present application can function functionally It can mean having a broader direction than within.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

Each feature of the various examples of the present application can be combined or combined with each other partially or entirely, and various technological interconnections and operations are possible, and each example can be implemented independently of each other or together in a related relationship. .

Hereinafter, a preferred example of a display device and an electronic device including the same according to the present application will be described in detail with reference to the attached drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings.

FIG. 1 is a plan view showing a display panel displaying a first image I1 according to an example of the present invention. FIG. 2 is a plan view showing a display panel according to an example of the present invention displaying a second image I2. Figure 3 is a perspective view showing a display panel according to an example of the present invention displaying a three-dimensional image by combining the first image I1 and the second image I2.

The display panel according to an example of the present invention displays the first image I1 and the second image I2 in the display area DA.

The first image I1 is visible to the user 500 to be located on the surface of the display area DA of the first display member 100. The first image I1 displays a background image representing the background or fixed objects.

The second image I2 is recognized by the user 500 as if it is located closer to the display area DA of the first display member 100. The second image I2 displays a floating image representing nearby objects or moving objects.

The user 500 recognizes the objects displayed in the second image I2 as nearby objects, and recognizes the objects displayed in the first image I1 as distant objects.

In order to recognize the objects displayed by the second image (I2) as objects located closer than the objects displayed by the first image (I1), the second image (I2) is presented to the user 500 more than the first image (I1). It must be displayed at a nearby location. Since the light emitted when displaying the second image (I2) at a location closer to the user 500 than the first image (I1) travels a shorter path, the light displayed as the second image (I2) Objects can feel like they are located nearby. Since the first image I1 and the second image I2 are viewed simultaneously, the user 500 can view an image with a three-dimensional effect.

Figure 4 is a cross-sectional view of a display panel according to an example of the present invention. Figure 5 is a cross-sectional view of a display panel according to another example of the present invention. A display panel according to an example of the present invention includes a first display member 100, a second display member 200, and a light blocking member 300.

The first display member 100 displays the first image I1. The first image I1 is a background image that displays the background or a fixed object. The first image I1 begins to emerge as light L from the back of the first display member 100. That is, the first image I1 is projected behind the front of the first display member 100 by an amount equal to the thickness of the first display member 100. On the front side, the first image I1 is viewed as being disposed behind the first display member 100 by the thickness of the first display member 100 .

First patterns 111 displaying the first image I1 are provided on the back of the first display member 100. The first patterns 111 are patterned on the display area DA in the same form as a background image representing the background or fixed objects. The first display member 100 displays a first image I1 of the same form as the first pattern 111.

The first image I1 displayed by the first display member 100 is a background image that represents display items that do not change under any circumstances, such as numbers and borders on the vehicle instrument panel, and instructions on the indicator board, or background or fixed objects. . Since the first image I1 is an image that does not change, a separate driver is not required to display the first image I1. The display panel according to an example of the present invention does not display the first image I1 displayed by the first display member 100 on a separate display panel, but displays the first pattern 111 in a layer within one display panel. By using the display panel, the overall thickness of the display panel can be thinned.

More specifically, the first display member 100 is a light guide plate that emits light L in the front direction. The light guide plate totally reflects light (L) internally in all directions except the front. The light guide plate emits light (L) to the front. The light guide plate guides and propagates light L as a waveguide, and then emits light L from a patterned portion provided on the back. The light guide plate is made of a material with a high refractive index in order to completely reflect light L inside. A first pattern 111 having holes, micro lenses, and other irregular irregularities for emitting light L in the front direction is patterned on the back of the light guide plate.

A light source 110 is disposed on the side of the light guide plate. The light source 110 supplies light to the light guide plate. The light source 110 can be implemented as a light emitting diode (LED), a fluorescent lamp, or any other type of device that can supply light.

When the first display member 100 is implemented with a light guide plate and a light source 110, the first pattern 111 is patterned on the back of the light guide plate, and when the light source 110 is turned on, the first pattern 111 is patterned on the back of the light guide plate. The first image I1 is displayed on the front of the light guide plate in the same form as . Accordingly, an example of the present invention presents a specific implementation method that can display the first image I1, which is a fixed background image, without a separate driver or control circuit.

Alternatively, as shown in FIG. 5, the first pattern 111 may be formed on the front surface of the first display member 100 of the present invention. In this case, the light L that is totally reflected inside the first display member 100 is emitted from the area where the first pattern 111 is provided on the front surface. In this case, a gap (GAP) having a predetermined thickness is formed between the first display member 100 and the second display member 200 to emit light L.

The second display member 200 is disposed in front of the first display member 100. The second display member 200 may be placed adjacent to the first display member 100 or may be placed at a predetermined distance from the first display member 100 . The second display member 200 displays the second image I2.

The second display member 200 is disposed closer to the user 500 than the first display member 100. Accordingly, the second image I2 displayed by the second display member 200 may be perceived by the user as an image depicting an object placed closer than the first image I1. When the second display member 200 is arranged to be spaced apart from the first display member 100 by a predetermined distance, the second image I2 will be displayed closer to the user, thereby further increasing the three-dimensional effect.

In order to display the second image I2 on the second display member 200, a gate driver and a plurality of source drive integrated circuits (hereinafter referred to as “ICs”) are provided around the display panel according to an example of the present invention. ), a plurality of flexible circuit films, a circuit board, and a timing controller may be further provided.

The second display member 200 according to an example of the present invention includes a plurality of gate lines and a plurality of data lines arranged to cross each other.

The plurality of gate lines extend long along the first horizontal axis direction of the second display member 200 and are spaced apart at regular intervals along the second horizontal axis direction that horizontally intersects the first horizontal axis direction.

The plurality of data lines intersect the plurality of gate lines, extend long along the second horizontal axis direction, and are spaced apart at regular intervals along the first horizontal axis direction.

Pixels are respectively disposed at intersections of data lines and gate lines. Each pixel is connected to a data line and a gate line. Each pixel includes a thin film transistor and a storage capacitor. The thin film transistor is turned on by the gate signal of the gate line. The turned-on thin film transistor supplies the data voltage of the data line to the pixel.

The second display member 200 includes a display area and a non-display area. In the display area, gate lines and data lines are arranged to cross each other. The intersection areas of the gate lines and data lines each define a pixel area.

The non-display area is placed outside the display area. More specifically, the non-display area refers to the remaining area of the second display member 200 excluding the display area. For example, the non-display area may be the upper, lower, left, and right edges of the second display member 200.

The gate driver generates a gate signal according to the gate control signal input from the timing controller and supplies it to the gate line. The gate driver according to an example of the present invention may be provided as a Gate in Panel (GIP) circuit in the non-display area of the second display member 200.

The GIP circuit is built into the non-display area of the second display member 200 along with the transistor of the pixel. For example, the gate driver consisting of a GIP circuit may be provided in a non-display area on one side and/or the other side of the display area, but is not limited to this and is provided in any non-display area that can supply a gate signal to the gate line. .

Each of the plurality of source drive ICs is mounted on a flexible circuit film, receives digital video data and data control signals supplied from the timing controller, converts digital video data into analog data voltage according to the data control signal, and supplies it to the data lines. do. When the source drive IC is manufactured as a driving chip, each source drive IC may be mounted on a flexible circuit film using a chip on film (COF) or chip on plastic (COP) method.

Each of the plurality of flexible circuit films is attached to a pad provided on the second display member 200. At this time, each of the plurality of flexible circuit films is attached to the pads using an anisotropic conducting film (antisotropic conducting film, ACF). Each of these plurality of flexible circuit films supplies the data voltage supplied from the source drive IC to the data line through the pad portion. Additionally, at least one of the plurality of flexible circuit films supplies a gate control signal supplied from the timing controller to the gate driver.

The circuit board is connected to a plurality of flexible circuit films. A circuit board supports multiple circuits implemented with driving chips. For example, a timing controller may be mounted on a circuit board. The circuit board may be a printed circuit board or a flexible printed circuit board.

The timing controller is mounted on a circuit board and receives digital video data and timing signals from an external system board. Here, the timing synchronization signals include a vertical sync signal that defines one frame period, a horizontal sync signal that defines one horizontal period, and a data enable signal that indicates whether or not data is valid. ), and a dot clock, which is a clock signal with a predetermined period.

The timing controller generates a gate control signal for controlling the operation timing of the gate driver and a data control signal for controlling the source drive ICs based on the timing synchronization signals. The timing controller supplies a gate control signal to the gate driver and a data control signal to a plurality of source drive ICs.

More specifically, the second display member 200 is a transparent organic light emitting device (OLED) layer. A transparent organic light emitting device can be formed by forming a transmission part in which pixels are not arranged between light emitting parts in which pixels are arranged. The transparent organic light emitting device layer can be implemented by using a transparent conductive layer such as ITO as the base layer of the thin film transistor layer.

When the second display member 200 is transparent, the light L emitted from the first display member 100 is not blocked, so the luminance of the first image I1 does not decrease. When the second display member 200 is formed of an organic light emitting device layer, the thickness of the second display member 200 can be reduced. Therefore, the thickness of the display panel can be reduced.

The second display member 200 preferably does not have flexibility. If the second display member 200 is flexible, the second display member 200 is bent and the second image I2 displayed by the second display member 200 is displayed on the first display member 100. There may be cases where the images are not aligned with the first image (I1) and are distorted. If the first image (I1) and the second image (I2) are not aligned and are distorted from each other, fatigue may be felt when viewing a 3D image. Additionally, color interference or moire phenomenon may occur. Therefore, it is preferable that the second display member 200 remains fixed at a certain distance and in a certain area where it is initially installed from the first display member 100.

The light blocking member 300 is disposed on the rear side of the first display member 100. The light blocking member 300 may be disposed adjacent to the first display member 100 or may be disposed at a predetermined distance from the first display member 100 . The light blocking member 300 blocks light L from passing through.

More specifically, the light blocking member 300 may be implemented as a black sheet. The black sheet is black on the entire front and back area, and absorbs all light (L) incident on the front and back. Accordingly, it is possible to block light L from leaking from the first display member 100 and the second display member 200 to the rear. In addition, the first display member 100 and the second display member 200 can emit light L to the front, or all background areas that do not emit light can be viewed as completely black.

FIG. 5 is an example diagram showing a display panel according to an example of the present invention displaying a first image I1.

One example diagram shows a vehicle instrument panel. On a vehicle instrument panel, there is information listed in text displays such as engine rotation speed, vehicle speed, and vehicle operating status. Information listing the engine rotation speed, vehicle speed, and vehicle operating status as text displays is always displayed in a fixed state. This information does not change and is displayed in the same location with the same content. This information can be displayed as the first image I1.

The first image I1 may be displayed on the first display member 100. Additionally, areas where the first image I1 is not displayed are viewed as black on the front side by the light blocking member 300. Accordingly, in the case of a vehicle instrument panel, all parts except for information listing the engine rotation speed, vehicle speed, and vehicle operating status in text display are recognized as black. In this case, the information to be displayed in the first image I1 can be better recognized.

Figure 6 is an example diagram showing a display panel according to an example of the present invention displaying a second image.

One example diagram shows a vehicle instrument panel. In a vehicle instrument panel, there is a display bar indicating the current engine rotation speed, a display bar indicating the current vehicle speed, a box indicating the current vehicle operating status, and a turn signal display. A display bar indicating the current engine rotation speed, a display bar indicating the current vehicle speed, a box indicating the current vehicle operating status, and a turn signal display change depending on the vehicle operating status. This information needs to be displayed separately from non-changing display items for better recognition. This information can be displayed as the second image I2.

The second image I2 may be displayed on the second display member 200. Additionally, areas where the second image I2 is not displayed are viewed as black on the front side by the light blocking member 300. Accordingly, in the case of the vehicle instrument panel, all parts except the display bar indicating the current engine rotation speed, the display bar indicating the current vehicle speed, the box indicating the current vehicle operating status, and the turn signal display are visible as black. In this case, the information to be displayed in the second image I2 can be better recognized.

FIG. 7 is a perspective view showing a display panel according to an example of the present invention displaying an image combining the first image I1 and the second image I2.

The first image I1 and the second image I2 can both be displayed on one display area. The first image I1 and the second image I2 may not overlap, or even if they overlap, the properties of the information they display are different, so they can be easily distinguished. The first image I1 displays information that always remains constant regardless of the passage of time or the state of the vehicle. The second image I2 displays information that changes over time or depending on the state of the vehicle.

The first image I1 always emits light only in a certain part, and its brightness is also maintained constant. The first display member 100 does not require a separate driver or control circuit. The first display member 100 designs the first pattern 111 to emit light only from a certain portion, and emits light in the same shape as the first pattern 111. For example, in the case of a vehicle instrument panel, the first pattern 111 displays information listing the engine rotation speed, vehicle speed, and vehicle driving status as text displays, that is, in the form of a circular plate, number, and driving status text display. It can be formed on the surface of the first display member 100. In this case, since the light L is emitted to the outside only from the first pattern 111, the first image I1 having the same shape as the first pattern 111 can be implemented.

Figure 8 is an exemplary diagram showing a method of manufacturing the first display member 100 according to an example of the present invention.

When the first display member 100 is a light guide plate, it is typically formed of polymethyl methacrylate. Polymethyl methacrylate is a representative methacrylic resin among polymer materials obtained by polymerizing methyl methacrylate (CH2＝C(CH3)COOCH3) and is usually abbreviated as PMMA. Among plastic materials, polymethyl methacrylate has excellent transparency and light resistance, and also has excellent mechanical strength and formability, so it is widely used as a material for light guide plates.

The first pattern 111 according to an example of the present invention is patterned in a negative manner on the back of the first display member 100. The portion where the first pattern 111 is patterned on the back of the first display 100 is etched, cut, or otherwise shaved so that it is deeper than other areas. Since total reflection cannot occur in the shaved portion and the light L traveling inside is transmitted, the light L may be emitted to the outside in the area where the first pattern 111 is provided.

In order to form the first pattern 111 in polymethyl methacrylate, a softened mold 800 on which a pattern of the same shape as the first pattern 111 is embossed is prepared. The soft mold 800 is a mold for molding plastic such as polymethyl methacrylate. It is easy to form a pattern in relief on the soft mold 800. The soft mold 800 has a unique shape and is generally used when multiple products of the same shape must be made.

To form the first pattern 111 on the soft mold 800, the Film Master Photo process method can be used. First, prepare a film master with uniformly arranged irregularities that can create a pattern, and apply photoresist material. Next, a photosensitive mask is applied to the area where the first pattern 111 is to be formed so as not to receive ultraviolet (UV) rays, and ultraviolet (UV) exposure is performed so that the remaining area receives ultraviolet (UV) rays. What remains after development is the soft mold 800 in which the first pattern 111 is formed.

The next step introduced in FIG. 8 is placing the soft mold 800, uniformly applying resin 700 on it, and then placing the first display member 100 to form the first pattern 111. It is done. In the display panel according to an example of the present invention, the first display member 100 will be arranged so that the first pattern 111 faces the rear. At this stage, ultraviolet rays (UV) are irradiated, and when irradiated with ultraviolet rays (UV), the first pattern 111 is formed on the first display member 100 in an intaglio, identical to the shape of the soft mold 800.

Figure 9 is a plan view showing the first pattern 111 on the first display member 100 according to an example of the present invention.

As an example, the first pattern 111 may be formed on the first display member 100 in a shape intended to display the first image I1. In FIG. 9 , the first pattern 111 is arranged in a P shape and is formed in the form of a fine horizontal groove on the surface of the first display member 100. However, it is not limited to this, and the first pattern 111 may be formed in the form of a fine vertical groove, or may be formed in the form of a fine circular or other groove shape.

When the first pattern 111 is formed, light L traveling inside the first display member 100 is emitted from the first pattern 111. Additionally, in areas where the first pattern 111 is not formed, the light L is not emitted but is totally reflected internally. Accordingly, the first image I1 can be displayed in the form of the first pattern 111.

Figure 10 is a block diagram showing a multi-layer display device according to an example of the present invention.

A multilayer display device according to an example of the present invention includes a display panel according to an example of the present invention, and a panel driver 400 that drives the display panel.

The panel driver 400 supplies power so that the display panel can be turned on. The panel driver 400 controls the brightness of the display panel and the displayed image according to the information to be displayed on the display panel. The panel driver 400 controls the first image I1 and the second image I2 to be displayed accurately without misalignment on the display panel.

The panel driver 400 includes a first power supply unit 410, a second power supply unit 420, and a control unit 430.

The first power supply unit 410 turns on the first display member 100. When receiving the first signal (SIG1), the first power supply unit 410 supplies the first power (Power1) to the first display member 100 to turn on the first display member 100.

The first signal (SIG1) is a signal for displaying the first image. The first signal SIG1 is supplied from the external system board 600 to the panel driver 400. The first signal (SIG1) is supplied to the control unit 430 inside the panel driver 400. When the first signal (SIG1) is supplied to the first power supply unit 410, the first power supply unit 410 supplies the first power (Power1) to the first display member 100. Accordingly, when turning on the first display member 100, the control unit 430 supplies the received first signal SIG1 to the first power supply unit 410.

The first image I1 displays information that does not change with the passage of time or the surrounding conditions of the multi-layer display device. There is no need to supply separate digital video data inside the multilayer display device to display the first image I1. Accordingly, the multilayer display device according to an example of the present invention turns on the first power supply unit 410 using the first signal SIG1 to supply the first power source Power1 to the first display member 100. The first image I1 can be displayed through a simple configuration provided.

The second power supply unit 420 turns on the second display member 200. The second power supply unit 420 receives second digital video data (DATA2). The second power supply unit 420 generates the second data voltage VD2 based on the second digital video data DATA2. The second power supply unit 420 supplies the second data voltage VD2 to the second display member 200.

The second digital video data (DATA2) is supplied from the system board 600. The second digital video data (DATA2) is supplied to the control unit 430 inside the panel driver 400. The second digital video data DATA2 includes image information for displaying the second image I2 on the second display member 200. When turning on the second display member 200, the control unit 430 supplies second digital video data DATA2 to the second power supply unit 420.

The second data voltage VD2 is supplied only to the second display member 200. Accordingly, it is possible to independently display the second image I2 on the second display member 200. In addition, it is possible to convert only the elements expressed in the second image I2 while maintaining the luminance or expression of the first image I1. Accordingly, various expressions are possible, such as a display that changes only the speed needle or a display that changes only the brightness of the speed needle, in the vehicle instrument panel introduced as an example.

The control unit 430 may selectively supply the first signal (SIG1) and the second digital video data (DATA2). The control unit 430 may simultaneously supply the first signal SIG1 and the second digital video data DATA2 to simultaneously display the first image I1 and the second image I2. However, it is not limited to this, and the control unit 430 may display only the first image (I1) by supplying the first signal (SIG1), and may display only the second image (I2) by supplying only the second digital video data (DATA2). It can also be displayed.

In one example of the present invention, a transparent OLED display is applied to the upper part of one display panel and a light guide plate with a specific pattern is combined to the lower part to implement a multi-layer display with high brightness, slim design, and price competitiveness.

In one example of the present invention, a light source is attached to the edge of a light guide plate, and light entering the light guide plate is emitted by a pattern inside. A black sheet is attached to the lower part of the light guide plate to improve the contrast ratio (CR) and visibility of information displayed by the light guide plate. Additionally, the present invention can selectively implement a multi-layer display mode or a single-layer display mode by turning on or off the light source.

In one example of the present invention, a multi-layer display can be implemented with one display panel. Accordingly, the multilayer display device according to an example of the present invention does not cause moiré phenomenon or resolution degradation problems and has little luminance degradation. Additionally, the multilayer display device according to an example of the present invention can reduce costs compared to a stacked multilayer display structure. In addition, the multilayer display device according to an example of the present invention can implement a three-dimensional effect through the thickness of the light guide plate, so a separate gap glass is not required, and a slim design can be implemented compared to the stacked multilayer display structure.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications, and changes are possible without departing from the technical details of the present application. It will be clear to those who have the knowledge of. Therefore, the scope of the present application is indicated by the claims described later, and the meaning and scope of the claims and all changes or modified forms derived from the equivalent concept should be interpreted as being included in the scope of the present application.

100: first display member 110: light source
111: first pattern 200: second display member
300: light blocking member 400: panel driving unit
410, 420: first and second power supply units 430: control unit
500: User 600: System board
700: Resin 800: Soft Mold
DA: Display area I1, I2: 1st and 2nd image

Claims (9)

a first display member displaying a first image;
a second display member disposed in front of the first display member to display a second image;
It includes a light blocking member disposed on the rear side of the first display member,
First patterns displaying the first image are provided on the first display member,
The first patterns are formed on the front surface of the first display member,
A display panel in which a gap having a predetermined thickness is formed between the first display member and the second display member to emit light. According to claim 1,
The first display member is a light guide plate that emits light in the front direction,
A display panel wherein a light source is disposed on a side of the light guide plate. delete The method of claim 1, wherein the second display member is:
A display panel, which is a transparent organic light-emitting element layer. The method of claim 1, wherein the light blocking member:
Black sheet, display panel. The display panel of any one of claims 1, 2, 4, and 5; and
A multilayer display device comprising a panel driver that drives the display panel. The method of claim 6, wherein the panel driver:
a first power supply unit that turns on the first display member; and
A multilayer display device comprising a second power supply that turns on the second display member. The method of claim 6, wherein the panel driver:
When displaying the first image, a multilayer display device that receives a first signal for displaying the first image from a system board and turns on the first display member according to the first signal. The method of claim 6, wherein the panel driver:
When displaying the second image, second digital video data for displaying the second image is supplied from the system board, and a second data voltage is generated based on the second digital video data to display the second display member. Supplied with multi-layer display devices.

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