KR20100038877A - Sunlight readable display module and method for fabricating the same - Google Patents

Abstract

PURPOSE: A display module and a manufacturing method thereof are provided to improve the brightness of the display module by reducing the intensity of light which is reflected to the front of the display panel using fillers. CONSTITUTION: A display module comprises a display panel(110), a bezel(120), an optical transmitting plate(130), and a filler(140). The bezel protects the circumference part of the front of the display panel and the side of the display panel. The optical transmitting plate is arranged on the front side of the display panel and the bezel. The filler is arranged between the front side of the display panel and the plate. A first polarizing plate(111) and a filler concentrates external light.

Description

Display module readable in strong sunlight and method for manufacturing the same

The present disclosure generally relates to a display module readable in strong sunlight and a method of manufacturing the same.

Recently, display modules have emerged as a medium for providing information outdoors such as outdoor billboards, aircraft navigation systems, and vehicle navigation systems. Due to the nature of being installed in a bright environment, high luminance is required compared to a TV.

When the display module operates in an environment where external light is strong, the display module according to the related art has a problem in that image quality deteriorates due to light reflected from the front of the display module.

The present invention is to provide a display module and a manufacturing method of a new structure different from the prior art.

In addition, the technical problem to be achieved by the present disclosure is to provide a display module with improved brightness and a method of manufacturing the same.

In addition, a technical object of the present disclosure is to provide a display module and a method of manufacturing the same that are easy to produce.

According to one embodiment, a display module is disclosed. The display module includes a display panel, a bezel surrounding the periphery and side surfaces of the display panel, a light transmissive plate disposed on the front surface and the bezel of the display panel, and a filler located in a space between the front surface and the plate of the display panel. It includes.

In addition, according to one embodiment, a display module manufacturing method is disclosed. The method of manufacturing a display module includes preparing a display panel, wrapping a periphery and side surfaces of the display panel with a bezel, forming a fill on the front surface of the display panel, and placing a light transmissive plate on the fill. Include.

The display module and its manufacturing method according to the present disclosure has the advantage that the brightness of the display module is improved.

In addition, the display module and the method of manufacturing the same according to the present disclosure are excellent in terms of productivity in that an existing display panel can be used as it is.

Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the technology of the present disclosure is not limited to the embodiments described herein and may be embodied in other forms. However, the embodiments introduced herein are provided to ensure that the disclosure and the spirit of the present disclosure are sufficiently delivered to those skilled in the art. In the drawings, widths, thicknesses, or shapes of structures are enlarged in order to clearly express various layers (or layers), regions, and shapes. The drawings have been described at the point of view of the observer, and in cases where parts such as layers, films, regions, etc. are expressed as being “above or above” other parts, in addition to being “on or directly above,” another in the middle Includes parts if present.

1 is a diagram illustrating a display module according to an exemplary embodiment. 1 shows a cross-sectional view of a display module. Referring to FIG. 1, the display module includes a display panel 110, a bezel 120, a plate 130, and a fill 140. In addition, the display module may further include a sealing layer 150, a primer 160, an optical film 170, a backlight unit 180, or a circuit board 190.

Various types of display panels may be used as the display panel 110. The display panel 110 is, for example, a liquid crystal display panel (hereinafter simply referred to as LCD), a plasma display panel (hereinafter referred to as PDP), and a field emission display panel (hereinafter referred to as "PDP"). Abbreviated as FED), electroluminescence display panel (hereinafter simply referred to as ELD), vacuum fluorescent display panel (hereinafter simply referred to as VFD), organic light emitting diode display (organic light emitting diode display) panel, hereinafter simply referred to as OLED) or a light emitting diode display panel (hereinafter referred to simply as LED).

In the figure, an LCD is represented as an example as the display panel 110. The LCD includes a first polarizer 111, a first substrate 113, a liquid crystal layer 115, a second substrate 117, and a second polarizer 119.

The first polarizer 111 is disposed between the first substrate 113 and the filler 140. Various kinds of materials may be used as the material of the first polarizing plate 111. The material of the first polarizing plate 111 may be, for example, a polyvinyl alcohol polymer film in which iodine (I ₂ ) is adsorbed. The first polarizing plate 111 may be composed of a multilayer composite film. The first polarizing plate 111 transmits light that vibrates only in a specific direction. The axis through which light passes through the polarizer is called the polarization axis. In addition, a haze surface treatment may be performed on the upper surface of the first polarizing plate 111 to diffusely reflect external light. Haze surface treatment means increasing the roughness of the surface of a polarizing plate. As an embodiment, when external light is incident on the upper surface of the first polarizing plate 111, the reflection of the external light may be concentrated in a specific area of the upper surface of the first polarizing plate 111. When the haze surface treatment is applied to the upper surface of the first polarizing plate 111, the reflection of external light intensively generated in the specific region of the upper surface of the first polarizing plate 111 may be dispersed to the entire upper surface of the first polarizing plate 111. Therefore, the effect of improving the luminance can be obtained. Various methods can be used as a method of haze surface treatment. The method of haze surface treatment may be, for example, a method of engraving a straight groove, a reticulated groove, or a hemi-sphere groove at regular intervals on the upper surface of the first polarizing plate 111. As another example, the method of haze surface treatment may be a method of arranging hemispherical protrusions at regular intervals on the upper surface of the first polarizing plate 111.

The first substrate 113 is disposed between the first polarizer 111 and the liquid crystal layer 115. A color filter array (not shown) is disposed on one surface of the first substrate 113. Various kinds of materials may be used as the material of the first substrate 113. The material of the first substrate 113 may be, for example, a glass or plastic substrate. The color filter array serves to implement colors of the LCD. The color of the LCD is represented by additive color mixing of three primary colors generated when white light of the backlight unit 180 passes through the color filter array.

The liquid crystal layer 115 is disposed between the first substrate 113 and the second substrate 117. Liquid crystal is a substance having a property in between liquid and solid. Various liquid crystals can be used as the liquid crystal. The liquid crystal may be, for example, a nematic liquid crystal, a smectic liquid crystal, or a cholesteric liquid crystal. The liquid crystal molecules forming the liquid crystal layer 115 may have various molecular arrangements. The molecular array can be, for example, a homogeneous array, a homeotropic array, a pretilted array, a twisted array or a hybrid array. Various kinds of materials may be used as the material of the liquid crystal layer 115. The material of the liquid crystal layer 115 may be, for example, a high molecular organic compound. The liquid crystal layer 115 may serve as a switch to block or pass light because optical or electrical characteristics change when a voltage is applied.

The second substrate 117 is disposed between the liquid crystal layer 115 and the second polarizing plate 119. A thin film transistor array (not shown) is disposed on one surface of the second substrate 117. Various kinds of materials may be used as the material of the second substrate 117. The material of the second substrate 117 may be, for example, a glass or plastic substrate. The thin film transistor array adjusts the voltage applied to the liquid crystal layer 115 to change the amount of light transmitted by changing the molecular arrangement of the liquid crystal. By adjusting the amount of light, various colors can be expressed.

The second polarizer 119 is disposed below the second substrate 117. Various kinds of materials may be used as the material of the second polarizing plate 119. The material of the second polarizing plate 119 may be, for example, a polyvinyl alcohol polymer film obtained by adsorbing iodine (I ₂ ). The second polarizing plate 119 may be composed of a multilayer composite film. The second polarizer 119 transmits light that vibrates only in one specific direction. The polarization axis of the second polarizer 119 may maintain a constant angle with the polarization axis of the first polarizer 111. In an embodiment, the polarization axis of the second polarizer 119 may be perpendicular to the polarization axis of the first polarizer 111.

The bezel 120 surrounds the periphery and the side of the front of the display panel 110. Various kinds of materials may be used as the material of the bezel 120. The material of bezel 120 may be, for example, reinforced plastic. The bezel 120 serves to fix the display panel 110. In the drawing, an example in which the bezels 120 are separately disposed is represented. As another example, unlike in the drawings, portions of the bezel 120 opposite to the surface facing the plate 130 may be connected to each other.

The plate 130 is disposed on the display panel 110 and the bezel 120. Various kinds of materials may be used as the material of the plate 130. The material of plate 130 may be, for example, glass or a polymeric compound. The plate 130 is light transmissive. In addition, the plate 130 may serve to reduce the intensity of external light (for example, sunlight) reflected from the front of the display panel 110. That is, the plate 130 may have an anti reflective function. In addition, the plate 130 may serve to protect the front surface of the display panel 110 from the external environment. In addition, the plate 130 may perform a function as an input device. The input device serves to input information to a driving circuit for driving the display panel 110. In one embodiment, a touch-screen panel may be used as the plate 130. The touch screen panel refers to a device that transmits information corresponding to the command to a driving circuit for driving the display panel 110 when the user places a hand or a special device on a specific command portion of the screen. Various types of touch screen panels may be used as the touch screen panel. The touch screen panel is, for example, a surface capacitive overlay method, a projected capacitive overlay method, a resistive overlay method, a surface acoustic wave method or an infrared beam method. It may be a touch screen panel.

The fill 140 is located in a space between the front surface of the display panel 110 and the plate 130. Various kinds of materials may be used as the material of the fill 140. The material of fill 140 may be, for example, optical silicone, optical polymer, or resin. The first polarizing plate 111 and the filler 140 treated with the haze surface may serve to condense the external light transmitted through the plate 130. In addition, the filler 140 may serve to reduce the intensity of light reflected from the front surface of the display panel 110. In addition, the filler 140 may serve to protect the front surface of the display panel 110 from an external environment. When the plate 130, the filler 140, the haze surface-treated first polarizing plate 111, or a combination thereof are used, a display module having improved luminance may be implemented. Luminance refers to the amount of light that passes through a certain area and enters a certain solid angle. In addition, the filler 140 may perform a function of adhering the plate 130 to the display panel 110 and the bezel 120. The method of arranging the filler 140 in the space between the front surface of the display panel 110 and the plate 130 may include, for example, placing the filler 140 over the front surface and the bezel 120 of the display panel 110 and filling the filler 140. ) May be disposed on the plate 130. When the filler 140 is disposed on the front surface of the display panel 110 and the bezel 120, the filler 140 may be disposed between the display panel 110 and the bezel 120. Can flow down the side. In order to prevent this, the sealing layer 150 may be disposed. The gap is caused by a free space (hereinafter, referred to as clearance) between the bezel 120 and the peripheral portion of the front surface of the display panel 110.

The sealing layer 150 is disposed in the gap located between the front surface of the display panel 110 and the bezel 120. Various kinds of materials may be used as the material of the sealing layer 150. The material of the sealing layer 150 may be, for example, silicone or polymer. When the bezel 120 is assembled to the display panel 110, play may occur. The sealing layer 150 serves to prevent the filler 140 from flowing down to the side of the display panel 110 through the gap. The drawing illustrates an example in which the sealing layer 150 is disposed in a gap located between the front surface of the display panel 110 and the bezel 120. In another embodiment, when the bezel 120 is assembled to the display panel 110, the sealing layer 150 may be omitted when the gap does not occur.

The primer 160 is disposed in a gap located between the front surface of the display panel 110 and the bezel 120. Various kinds of materials may be used as the material of the primer 160. The material of the primer 160 may be, for example, a material of silane, urethane, synthetic rubber, or synthetic resin. Primer 160 is used to improve the bonding between dissimilar materials. The primer 160 may be used to improve bonding between the bezel 120 and the sealing layer 150 and bonding between the sealing portion 150 and the periphery and side surfaces of the front of the display panel 110. In the drawing, an example in which the primer 160 is disposed in a gap located between the front surface of the display panel 110 and the bezel 120 is illustrated. In another embodiment, when the bezel 120 is assembled to the display panel 110, the primer 160 may be omitted when no play occurs. In another embodiment, the primer 160 is omitted when the bonding property between the bezel 120 and the sealing layer 150 and the bonding property between the periphery and side surfaces of the front surface of the display panel 110 and the sealing layer 150 are good. Can be.

The optical film 170 is disposed below the display panel 110. Various kinds of films may be used as the optical film 170. The optical film 170 may be, for example, a multi-condensing optical film. The multi-condensing optical film may be, for example, a multi-layer optical film. The multilayer optical film may be, for example, a DBEF (dual brightness enhancement film), a trade name of a multilayer optical film produced by 3M. External light is collected by the plate 130, the filler 140, and the haze-treated first polarizing plate 111 to be incident into the display panel 110. The optical film 170 may serve to return external light incident to the display panel 110. The external light returned can serve as a light source of the LCD. In addition, the optical film 170 may serve to improve the brightness of light emitted from the backlight unit 180. In the drawing, an example in which the optical film 170 is disposed below the display panel 110 is illustrated. As another embodiment, when the PDP, FED, ELD, VFD, OLED, or LED is used as the display panel 110, the optical film 170 may be omitted. In addition, an example in which the optical film 170 is disposed between the display panel 110 and the backlight unit 180 is illustrated in the drawing. In another embodiment, the optical film 170 may be attached to the lower portion of the second polarizing plate 119. That is, the second polarizing plate 119 may be a composite film including the optical film 170. In this case, the optical film 170 is integrated with the second polarizing plate 119. As another embodiment, the optical film 170 may be attached to an upper portion of the backlight unit 180. That is, the second polarizing plate 119 may include the optical film 170. In this case, the optical film 170 is integrated with the backlight unit 180.

The backlight unit 180 is disposed below the optical film 170. As the backlight unit 180, a backlight unit 180 having various structures may be used. The structure of the backlight unit 180 may be, for example, a direct method, a metering method, or a method using a prism plate. The backlight unit 180 functions to provide light to the non-light emitting display panel. The non-light emitting display panel may be, for example, an LCD. In another embodiment, when the PDP, FED, ELD, VFD, OLED, or LED is used as the display panel 110, the backlight unit 180 may be omitted.

The circuit board 190 is disposed under the display panel 110. The circuit board 190 may include a driving circuit for driving the thin film transistor. In addition, the circuit board 190 may include a circuit for controlling the input image information. In the drawing, an example in which the circuit board 190 is disposed below the display panel 110 is illustrated. In another embodiment, unlike the drawing, the circuit board 190 may be disposed on the side of the display panel 110.

In the drawing, an example in which the bezel 120 and the plate 130 are in direct contact is represented. As another example, unlike the drawing, the filler 140 may be located between the bezel 120 and the plate 130.

2 to 7 are diagrams illustrating each step of the display module manufacturing method according to an exemplary embodiment of FIG. 1. Each figure shows a cross-sectional view of the display module.

Referring to FIG. 2, first, a display panel 110, an optical film 170, a backlight unit 180, and a circuit board 190 are prepared. As described above, the display panel 110, the optical film 170, the backlight unit 180, or the circuit board 190 may have various materials, structures, or arrangements. In the drawing, an example in which the display panel 110, the optical film 170, the backlight unit 180, and the circuit board 190 are disposed is represented. As another embodiment, when the PDP, FED, ELD, VFD, OLED, or LED is used as the display panel 110, the optical film 170 and the backlight unit 180 may be omitted. In addition, an example in which the circuit board 190 is disposed below the display panel 110 is illustrated in the drawing. In another embodiment, unlike the drawing, the circuit board 190 may be disposed on the side of the display panel 110.

Referring to FIG. 3, the bezel 120 is attached to the edge of the display panel 110, the optical film 170, the backlight unit 180, and the circuit board 190. As described above, various materials may be used as the material of the bezel 120. Various methods can be used as a method of attaching the bezel 120. The method of attaching the bezel 120 may be, for example, a method using a polymer organic adhesive (eg, epoxy).

Referring to FIG. 4, a primer 160 is formed at a portion of the bezel 120 opposite to the periphery of the front surface of the display panel 110 and the periphery of the front surface of the display panel 110. As described above, various materials may be used as the material of the primer 160. Primer 160 may be formed in a variety of ways. The primer 160 may be formed by, for example, spray spraying or painting. In the drawing, an example in which the primer 160 is disposed in a gap located between the front surface of the display panel 110 and the bezel 120 is illustrated. As another embodiment, when the bezel 120 is assembled to the display panel 110, if the play does not occur, the forming of the primer 160 may be omitted. In another embodiment, the primer 160 is formed when the bonding property between the bezel 120 and the sealing layer 150 and the bonding property between the periphery and side surfaces of the front surface of the display panel 110 and the sealing layer 150 are good. The step may be omitted.

Referring to FIG. 5, the sealing layer 150 is formed on the primer 160. As described above, various materials may be used as the material of the sealing layer 150. The sealing layer 150 may be formed in various ways. The sealing layer 150 may be formed by, for example, spray spraying or painting. The drawing illustrates an example in which the sealing layer 150 is disposed in a gap located between the front surface of the display panel 110 and the bezel 120. In another embodiment, when the bezel 120 is not assembled when the bezel 120 is assembled to the display panel 110, the step of forming the sealing layer 150 may be omitted.

Referring to FIG. 6, the filler 140 is formed on the front surface of the display panel 110 and the bezel 120. As described above, various materials may be used as the material of the fill 140. The fill 140 may be formed in various ways. The filler 140 may be formed by, for example, spray spraying, spin coating, or dip-coating.

Referring to FIG. 7, the plate 130 is attached onto the fill 140. As described above, various materials may be used as the material of the plate 130. Various methods may be used as a method of attaching the plate 130. As a method of attaching the plate 130, for example, the plate 130 is first floated on the fill 140. Thereafter, a predetermined pressure is applied for an appropriate time to attach the plate 130 to the front surface of the display panel 110 and the bezel 120. Heat may be applied to shorten the attachment time.

Although various embodiments of the disclosed technology have been described in detail as described above, a person of ordinary skill in the art should understand the present invention without departing from the spirit and scope of the disclosed technology defined in the appended claims. It will be appreciated that various modifications may be made to the disclosed technology.

1 is a diagram illustrating a display module according to an exemplary embodiment.

2 to 7 are diagrams illustrating each step of the display module manufacturing method according to an exemplary embodiment of FIG. 1.

Claims (21)

Display panel; A bezel surrounding the periphery and the side of the front of the display panel; A light transmissive plate disposed on the front surface of the display panel and the bezel; And Filling disposed in the space between the front surface and the plate of the display panel Display module comprising a. The method of claim 1, The plate is a display module comprising a touch screen panel. The method of claim 1, The plate has a display module having a light reflection prevention function. The method of claim 1, And the filler comprises optical silicon or resin. The method of claim 1, And a sealing layer that prevents the filler from penetrating into the gap between the display panel and the bezel, the gap being caused by the gap between the bezel and the periphery of the front surface. The method of claim 5, And the sealing layer is disposed in the gap. The method of claim 5, The sealing layer comprises a silicon or resin. The method of claim 5, And a primer for allowing the sealing layer to adhere well to the gap. The method of claim 1, The display panel A first substrate having a color filter array disposed on one surface thereof; A second substrate having a thin film transistor array disposed on one surface thereof; A liquid crystal layer disposed between one surface of the first substrate and one surface of the second substrate; A first polarizer disposed on the other surface of the first substrate; And A second polarizing plate disposed on the other surface of the second substrate; Display module comprising a. 10. The method of claim 9, The display panel A circuit board driving the display panel; And And a backlight unit disposed under the display panel and configured to provide light to the display panel. The method of claim 10, The display panel further includes an optical film disposed between the second polarizing plate and the backlight unit, The display module has a haze surface treatment on the first polarizer. The method of claim 11, The optical film includes a multi-layer optical film. The method of claim 1, The display panel includes any one of a liquid crystal display panel, a plasma display panel, a field emission display panel, an electroluminescent display panel, a vacuum fluorescent display panel, an organic light emitting diode display panel and a light emitting diode display panel. (a) preparing a display panel; (b) surrounding the periphery and side surfaces of the display panel with a bezel; (c) forming a fill on the front surface of the display panel; And (d) placing a light transmissive plate over the fill Display module manufacturing method comprising a. The method of claim 14, The plate is a display module manufacturing method comprising a touch screen panel. The method of claim 14, (e) performed prior to step (c) to prevent penetration of the filling between the display panel and the bezel, the gap being caused by play between the bezel and the periphery of the front surface. And forming a sealing layer in the gap. The method of claim 14, Is performed before step (c), (e1) forming a primer on the periphery and the bezel portion of the front side of the display panel, wherein the bezel portion is a portion opposite the periphery of the front side of the display panel; And (e2) forming a sealing layer on the primer such that the filling does not penetrate into the gap between the display panel and the bezel, the gap being caused by the gap between the bezel and the periphery of the front surface. Display module manufacturing method further comprising. The method of claim 14, The display panel A first substrate having a color filter array disposed on one surface thereof; A second substrate having a thin film transistor array disposed on one surface thereof; A liquid crystal layer disposed between one surface of the first substrate and one surface of the second substrate; A first polarizer disposed on the other surface of the first substrate; And A second polarizing plate disposed on the other surface of the second substrate; Display module manufacturing method comprising a. The method of claim 18, The display panel A circuit board driving the display panel; And And a backlight unit disposed under the display panel to provide light to the display panel. The method of claim 19, The display panel further includes an optical film disposed between the second polarizing plate and the backlight unit, And a haze surface treatment on the first polarizing plate. The method of claim 20, The optical film is a display module manufacturing method comprising a multi-layer optical film (multi-layer optical film).

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