KR101467192B1 - Displayer for Images Separator with Light control layer - Google Patents

Abstract

[0001] The present invention relates to an image separation display apparatus having a parallax barrier, A backlight for supplying a light source to the image display panel; A parabolic barrier disposed between the image display panel and the backlight to block or transmit light; And a light control layer formed on the parallax barrier and having a light collecting shape for condensing light onto a display panel.

According to the present invention, there is provided an image separation display device capable of realizing an epoch-making luminance improvement by changing the light path blocked by the blocking portion of the parasphere barrier to the transmission slit and increasing the light efficiency.

A parabolic barrier, an optical chair layer, an aspherical lens

Description

Dispersion for Images Separator with Light control layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image separation display device applied to a three-dimensional image display and a multi-view display using a parallax barrier method. More particularly, the present invention relates to an image separation display device capable of enhancing optical efficiency by condensing light from a light source that transmits a parallax barrier through a transmissive slit portion on a parabolic barrier in displaying image information displayed on a liquid crystal panel will be.

A brief description of the principle of feeling a three-dimensional feeling when a person views a specific object is as follows. The factors that people perceive stereoscopically through vision are very diverse and complex, but they can be divided into physiological factors and psychological memory factors. Physiologic factors include binocular convergence, binocular parallax, binocular parallax, and other perceptual factors such as lens accommodation, motion parallax, and binocular parallax. . On the other hand, psychological memory factors include geometric stereoscopic views such as size, height, superposition, and shape of objects, and optical stereoscopic views such as contrast, resolution, saturation, and color.

Among physiological and psychological memory factors described above, physiological factors of both eyes, such as binocular convergence angle and binocular disparity, are the greatest factors that cause three-dimensional feeling, and the technical field of the present invention is the shape of objects Dimensional image display device based on the principle of stereoscopic vision that a stereoscopic effect is felt because the stereoscopic images are different from each other.

In other words, when a person looks at an object using both left and right eyes, the left and right eyes are about 6.5 cm away from each other. Binocular parallax is called binocular parallax. The binocular disparity causes the brain to synthesize two different images received in the binocular by the binocular disparity, and the person feels a sense of depth and distance. do. In addition, since the left eye and the right eye are separated, when convergence angle, which is the angle formed by the line of sight between the eyes, is large when viewing an object close to the eye, and when looking at a distant object, the convergence angle becomes small. Because of the difference of angle, I feel three-dimensional feeling and distance feeling. Hereinafter, the stereoscopic image display device using the principle of stereoscopic viewing due to the binocular parallax will be described in more detail as follows.

That is, by using the principle that a person can feel a three-dimensional feeling when viewing different images in both eyes, an image constituting a specific object is constituted of a left-eye image felt by the left eye and a right-eye image felt by the right eye, , And only the right eye image is continuously displayed in the right eye, resulting in the same effect as viewing one stereoscopic image.

Such a stereoscopic image viewing method includes a method of wearing glasses according to whether the observer wears glasses or a method of not wearing glasses. The glasses are worn by anaglyph system which uses blue and red sunglasses in both eyes, a density difference system by which a filter with different transmittance is attached to the right and left glasses to obtain a three dimensional feeling, A polarizing glasses system, and a time division system in which glasses having a liquid crystal shutter that is periodically repeated and periodically synchronized with this period are used. However, there is a problem in wearing glasses because of the inconvenience of wearing glasses and wearing glasses, which hinders observation of objects other than stereoscopic images. Therefore, in recent years, studies on the non-eyeglass system which does not wear glasses have been actively conducted, and research and development for various uses are proceeding.

Representative examples of the spectacle-free spectacles that do not wear glasses include a lenticular system in which a lenticular lens plate in which cylindrical lens arrays are arranged vertically is installed in front of the image panel, and a parallax barrier system .

The stereoscopic image realization technique of the parallax barrier method described above is a representative example of the stereoscopic image realization technique for realizing a stereoscopic image by using the binocular parallax.

Referring to FIG. 1, FIG. 1 illustrates a conventional stereoscopic image display apparatus using a parallax barrier system.

In FIG. 1, a left eye pixel (L) for displaying an image through a pixel arrangement of R (Red) / G (Green) / B A liquid crystal panel (LCD panel) 110 alternately arranged with right eye pixels R for displaying right eye image information; a liquid crystal panel 110 disposed at a lower end of the liquid crystal panel 110, (120) formed by alternately alternately forming a transparent portion formed by a transparent slit (S) for allowing light emitted from the light source (R) to pass therethrough and a light shielding portion being a barrier (B) And a backlight 130 located under the parallax barrier 120 and being an artificial light source that emits light. At this time, both eyes of the observer, that is, the left and right eyes are located on the liquid crystal panel 110.

In the stereoscopic image display apparatus using the parabolic barrier system having the above-described configuration, light passing through the right eye pixel (R) of light passing through the transparent slit (S) of the parabolic barrier (120) And the light passing through the left eye pixel L reaches the observer's left eye. The barrier B of the parallax barrier 120 absorbs and blocks light so that the light generated from the backlight 130 can be distributed to the right eye pixel R and the left eye pixel L do. In this way, light having passed through the left eye pixel L is transmitted only to the left eye of the observer, and light passing through the right eye pixel R is transmitted only to the right eye of the observer. At this time, Sufficient parallax information is formed between the light and the light reaching the observer's right eye, and as a result, the observer can feel the three-dimensional stereoscopic image.

In the stereoscopic image display system using the conventional parallel barrier system, the liquid crystal panel 110 includes a color filter substrate including a first polarizing filter, a first glass substrate, a color filter, a counter electrode, and a first alignment layer, A structure in which an array substrate including a second alignment film, a pixel electrode, a TFT (Thin Film Transistor), a second glass substrate, and a second polarizing filter is bonded together under a liquid crystal layer including a spacer, The second polarizing filter is a filter for polarizing the light source supplied from the backlight 130. The counter electrode and the pixel electrode are driving electrodes for changing the molecular arrangement of the liquid crystal, And the spacer is a support for preventing warpage or the like of the first and second glass substrates, and the color filter is a device for displaying RGB colors.

The image separation display device using such a parallax barrier method has been applied to a multi-view display and a three-dimensional stereoscopic image display.

Multi-view display devices have been designed to allow multiple viewers to view images at the same time, and the characteristics of such display devices can be configured so that the viewer can view the same image at different angles to the display device And may be formed so that different images can be viewed from different angles. For example, a method of displaying the same image at different angles is effective when several users need the same information, such as departure information at airports and railway stations. In addition, a method of displaying different images at different angles can be usefully used in automobiles, for example. That is, the same display device allows the driver to view the satellite navigation data and the passenger to view the movie. The advantage to multi-view displays is that users can be independent of each other's eyes. As described above, it is well known that the parallax barrier system is applied to the stereoscopic image display in addition to the multi-view display.

However, in the conventional three-dimensional image display device using the parallax barrier system, since the barrier B region that can not transmit light in the parallax barrier 120 occupies about half of the entire parallax barrier 120 region, The light transmittance is lowered and the light efficiency is remarkably lowered due to the area of the light shielding portion, resulting in a problem that the luminance is lowered.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide an image display separating apparatus employing a parabarrier barrier method, in which, in order to solve the problem of low light transmittance, And a light control layer capable of changing into a slit portion so as to increase the light efficiency, thereby realizing an epoch-making brightness enhancement.

According to an aspect of the present invention, there is provided an image display apparatus comprising: an image display panel in which an image is implemented; a backlight for supplying a light source to the image display panel; A parabolic barrier disposed between the image display panel and the backlight to block or transmit light; And a light control layer formed on the parallax barrier and having a light collecting shape for condensing light onto a display panel. Here, the light control layer is formed by using a lens for condensing or an aspherical lens, so that the light efficiency can be increased and the brightness can be improved.

According to the present invention, there is an effect that it is possible to provide an image separation display device capable of realizing an epoch-making luminance improvement by changing the light path blocked by the blocking portion to the paraspace barrier to the transmission slit and increasing the light efficiency.

The present invention relates to an image display panel in which an image is implemented; A backlight for supplying a light source to the image display panel; A parabolic barrier disposed between the image display panel and the backlight to block or transmit light; And a light control layer formed on the parallax barrier and having a light collecting shape for condensing light onto a display panel, wherein the parasitic barrier layer The path of the light traveling to the barrier for blocking light can be changed to the transmission slit portion, thereby maximizing the light efficiency.

Further, the present invention provides a video separation display device characterized in that the paraplaid barrier comprises a transmission slit for transmitting light and a barrier for blocking light.

Further, according to the present invention, the light-converging shape of the light control layer is a light-converging shape having a curvature such that a path of light blocked by the barrier is focused by the transmissive slit, So that the luminance of the image separation display device can be improved.

In addition, the present invention provides an image separation display device characterized in that the light converging shape is formed of a lens.

In addition, the present invention can provide an image separation display device in which the light-converging shape is an aspherical lens, thereby realizing the efficiency of the light-converging structure.

Also, in the present invention, it is preferable that the light condensing shape is a structure in which spherical or aspheric lenses are arranged in a uniform or non-uniform manner, and it is possible to form a light control layer having various shapes, .

Further, the present invention provides an image separation display device, wherein the central axis of the light-converging shape is aligned with the center axis of the transmission slit.

In addition, the present invention provides an image separation display device characterized in that the barrier is made of black resin.

The black resin constituting the barrier of the present invention may be any one selected from among black carbon black, organic pigment mixed light-absorbing colorant, or hybrid type coloring material obtained by mixing carbon black and organic pigment mixed light- And a display unit for displaying an image.

In addition, the black component material constituting the black resin of the present invention is 20 to 50 wt% of the total proportion of the black resin.

In the present invention, the barrier may be formed by mixing inorganic materials in a metal or oxide system.

Hereinafter, the structure and function of the present invention will be described with reference to the accompanying drawings.

2 is a schematic view showing a structure for condensing light through a light control layer in a parabar barrier according to the present invention.

2 (a) shows a barrier 22 that acts as a light-shielding portion for shielding light from the transmission slit 21 of the parabarrier barrier 20 and the light projected from the light source L, The light passing through the light control layer 30 is changed into the transmission slit 21, as shown in FIG. FIG. 2 (b) shows the detailed structure of the light control layer 30. Symbols in the drawings are the same as in (a), and symbols X1, X2, and X3 are lines passing through the central axis of the transmission slit. As will be described later, it is preferable that the light-converging shape 34 changing the optical path is aligned so as to coincide with the central axis. A parallax barrier coupled with the backlight unit, and a light control layer will be described with reference to FIG.

As shown in FIG. 3, the present invention includes an image display panel 10 on which an image is implemented, and a backlight unit 40 for supplying a light source to the image display panel. Between the image display panel and the backlight unit is provided a parallax barrier 30 for blocking or transmitting light and a light control layer 30 for condensing light is provided under the mirror barrier.

The transmissive slit 22 and the barrier 22 are arranged so as to cross each other. The transmissive slit is a portion through which light is transmitted. The barrier acts as a portion where light is blocked, This is the part that functions to make it possible.

In particular, the barrier may be formed of a black resin. The black resin is basically composed of a base material, a surfactant, a black component, and the like. The black component may be formed by using a carbon black or an organic pigment mixed light-shielding colorant, or a mixture of carbon black and an organic pigment And a hybrid type coloring material in which a mixed light-blocking colorant is mixed. In this case, it is preferable that the hybrid type coloring material comprising carbon black, organic pigment, or a mixture of both is formed to contain 20 to 50 wt% of the total barrier. The base material may be a UV resin (polymer resin), and a silicone or fluorine (fluorine) material may be used as the surfactant.

As another example of the barrier, the barrier may be formed by mixing an inorganic material with a metal or oxide system.

The light control layer 30 is formed on the lower side of the parallax barrier and has a structure in which a predetermined light collecting shape 34 is formed on a transparent substrate. The light condensing shape may be directly formed on the transparent substrate, but it is preferably formed on the basic base films 32 and 33. The base film may be any film having a structure that does not impede the transmission of light.

In particular, the condensing shape 34 preferably has a curvature capable of condensing light having a convex structure, and the curvature can be adjusted so as to change the light path to the transmission slit. Particularly, such a light-condensing shape can be regularly or irregularly arranged using a lens, more specifically, a spherical or aspherical lens, so that light blocked at the barrier 22 portion can be changed to the transmissive slit 21 .

It is also possible to arrange the light-converging shapes by arranging only the spherical lens, or by arranging only the aspheric lens, or by arranging the spherical lens and the aspheric lens appropriately in an intersecting manner. Needless to say, it is also possible to arrange the spherical lens or the aspheric lens irregularly rather than the regular arrangement.

In addition, in the arrangement of the shape of the light-converging shape, it is basically arranged such that the central axes (X1, X2, X3) of the transmissive slit and the central axis of the light-converging shape coincide with each other Align) is preferable.

The effect of enhancing the light efficiency according to the present invention having such a light condensing shape will be described in more detail.

Basically, the parabolic barrier method exhibits a light efficiency proportional to the area ratio. Here, the area ratio refers to the ratio of the area of the transmission slit (transparent portion) divided by the total area (the sum of the transparent portion and the shield portion). In other words,

Area ratio = area of light transmitting portion / total area

(Here, the total area is the sum of the light transmitting portion + light shielding portion area)

If the area is differentiated, it is a function of the length of the two axes. therefore,

Light efficiency = length of light transmitting part / total length

(Where the total length is the sum of the length of the light-transmitting portion + the length of the light-shielding portion)

.

When calculating the light efficiency by measuring the brightness of a conventional parallax barrier sample using the BM-7A equipment, the area ratio of the transmission slit portion (transparent portion) and the barrier portion (light shield portion) in the parallax barrier is 1: 3 or 1: 4, and an area ratio of about 0.25 or 0.2 is obtained when the area ratio is calculated through the arithmetic calculation of the area ratio. In this case, the center luminance is only 9,888 nit in the backlight state, and the center luminance of 2,428 nit is calculated in the film type having the parabolic barrier. That is, the ratio of the area of the barrier to the transmission slit has a direct relationship with the optical efficiency, and the larger the area of the barrier, the lower the light efficiency.

That is, in order to increase the light efficiency at a given constant ratio, the present invention adds a light control layer having a condensing shape for condensing the light according to the present invention to a display panel in a parabar- .

The effect of the light efficiency according to the structure of the present invention is as follows. When the light intensity is 9888nit in the backlight state, the final center luminance after passing through the light control layer is 8009nit, and the light efficiency of about 80% can be obtained. Such an effect varies depending on the shape of the lens, and an optimum shape can be designed to have a light efficiency of at least 50% or more in accordance with the variation of the height ratio of the lens with respect to the length of the light shield.

An example in which the optimum optical efficiency is obtained in consideration of the variation of the ratio of the height of the lens to the length of the light-shielding portion will be described with reference to FIG.

4A is a graph showing the relationship between the number (A) of rays incident on a backlight unit and the number (B) of rays emitted after passing through a light control layer, (% B / A) of only the light control layer calculated by the number of rays (outgoing light from the backlight unit) calculated by the number of rays immediately before passing through the light control layer (that is, before entering the liquid crystal panel) Table. (Note that the number of light and the light efficiency in the table are measured by simulating the number of rays passing through the light control layer by irradiating 111 light rays to the light efficiency.)

As shown in the table, the portion (R) showing a significant increase in the light efficiency relative to the number of the constant rays passing through the backlight unit is determined by the light shape of the light control layer having the curvature of the aspherical lens according to the present invention, It can be confirmed that it is increased to 50 ~ 90%.

This effect depends on the shape of the lens, and higher efficiency can be realized according to the variation of the height ratio C of the lens with respect to the length of the light shield.

4A and 4B, the height ratio C of the lens with respect to the length of the light-shielding portion is the same as the center axis of the barrier (light-shielding portion) When considering the convex shape extending from the end portion a1 of the lens to the opposite end portion b1 of the lens through the central axis when the center axis of the lens of the shape is aligned, (H1, h2 ..) with respect to the lens height (h1, h2 ..). Considering this ratio, it is preferable to form the lens so that the ratio C of the height of the lens to the length of the light-shielding portion has a curvature at a ratio of 12 to 22%. (In this case, it is also conceivable to form the curvature of the lens flat in the case of the region having the lens shape but coinciding with the transmissive portion.)

It is also possible to set the curvature according to the ratio of the height of the lens according to the length of the light-shielding portion, but it is of course possible to set the curvature by numerical calculation for forming the aspheric lens. For example, in the case of forming a lens through an aspherical shape in forming a lens having a light-converging shape, a curve expressed by an aspherical surface and aspheric surface coefficients can be used. In particular, a bezier curve it is also possible to form the curvature of the unshaped shape. For example, it may be considered to provide a shape having a specific aspherical curvature on the basis of the starting point a1 and the end point b1 of the lens.

A process for manufacturing a parasitic barrier provided with a light control layer according to the present invention will be described with reference to FIG.

First, a master mold is fabricated so as to pattern the condensing shape of the light control layer (S 1). In this case, the master mold has a pattern for shaping the light-converging shape, and the pattern can be manufactured by a method such as machining, laser processing, or photolithography.

Next, a light condensing shape is formed on the transparent substrate or the base film. This can be formed by a stamp method, a heat transfer method, or a UV transfer method (S 2). Thereafter, the base film on which light condensation is formed is blanked (S3), and then laminated with a substrate of a film material to form a parabolic barrier (S 4). Forming a pattern of a transmissive slit (light-transmitting portion) and a barrier (light-shielding portion) on a substrate of a film material, which is a layer for forming a parallax barrier, by using lithography, screen printing or stamping, S 6).

The parabolic barrier provided with the optical control layer according to the present invention has a great degree of freedom in SAG, fill factor, pitch, shape control, etc., so that it is possible to form a lens according to various requests, .

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

1 is a conceptual diagram illustrating the operation of a conventional parabolic barrier.

2 and 3 are conceptual diagrams showing the structure of an image separation display device having a light control layer according to the present invention.

FIGS. 4A and 4B illustrate simulation results and optical curvature structures of a lens and a lens, respectively, in comparison of efficiency according to the shape of a lens, in a parabarrier barrier system having a light control layer according to the present invention.

5 shows a process for manufacturing a parallax barrier having a light control layer according to the present invention.

Claims (11)

An image display panel on which an image is implemented; A backlight for supplying a light source to the image display panel; A parallax barrier disposed between the image display panel and the backlight and including a transmission slit for transmitting light and a barrier for blocking light; And A light control layer coupled to the parallax barrier and having a condensing shape for condensing the light of the backlight into the transmissive slit by changing the path of light directed to the barrier to the transmissive slit; And a display unit for displaying the image. delete The method according to claim 1, Wherein the light converging shape of the light control layer has a curvature. The method of claim 3, Wherein the light converging shape is formed of a lens. The method of claim 4, Wherein the light converging shape is an aspherical surface lens. The method of claim 3, Wherein the light converging shape is a structure in which spherical or aspheric lenses are arranged uniformly or nonuniformly. The method according to any one of claims 4 to 6, And the central axis of the light-converging shape is aligned with the central axis of the transmission slit. The method according to claim 1, Wherein the barrier is made of black resin. The method of claim 8, Wherein the black resin is formed of any one of black color material selected from the group consisting of carbon black, an organic pigment mixed light-absorbing colorant, or a hybrid coloring material obtained by mixing carbon black and an organic pigment mixed light-absorbing colorant. Device. The method of claim 9, Wherein the black component material is 20 to 50 wt% of the total proportion of the black resin. The method according to claim 1, Wherein the barrier is formed by mixing an inorganic material with a metal or an oxide system.

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