KR20080057891A - Display device - Google Patents

Abstract

A display device is provided to make the second polarizing member to correspond to the entire surface of an adhesive member, thereby stably fixing a display panel unit. A display device includes a display panel unit, a fixing member, and an adhesive member(28). The fixing member fixes the display panel unit. The adhesive member performs the mutual adhesion of the display panel unit and the fixing member. The display panel unit includes a polarizing member. The polarizing member covers the entire surface of the adhesive member.

Description

Display device {DISPLAY DEVICE}

1 is a schematic exploded perspective view of a display device according to an exemplary embodiment.

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 after combining the display device of FIG. 1.

The present invention relates to a display device capable of stably fixing a display panel unit.

Various types of display devices have been developed. Among various display devices, liquid crystal display devices (LCDs), which have improved performances due to rapidly developing semiconductor technologies, are widely used.

The liquid crystal display device can be miniaturized, lightweight, and low power, and thus can replace a conventional cathode ray tube (CRT). Therefore, the liquid crystal display device is used as a small product such as a mobile phone, a personal digital assistant (PDA), a portable multimedia player (PMP), and the like as well as a monitor and a TV which are medium and large products. On the other hand, since the liquid crystal display device is not a self-luminous device, a light source for supplying light is required.

SUMMARY A display device capable of stably fixing a display panel unit is provided.

A display device according to an embodiment of the present invention includes i) a display panel unit, ii) a fixing member for fixing the display panel unit, and iii) an adhesive member for adhering the fixing member to each other. The display panel unit includes a polarizing member, and the polarizing member covers the entire surface of the adhesive member.

The display panel unit may include a first panel to which the polarizing member is attached and a second panel positioned on the first panel. The first panel may not directly face the adhesive member by the polarizing member. The polarizing member may be attached to the edge of the first panel.

The display device may further include a light source unit for supplying light to the display panel unit and an optical sheet for condensing light emitted from the light source and supplying the light to the display panel unit, wherein the adhesive member may be positioned flat on the light source unit and the optical sheet. Can be.

The adhesive member may be a pressure sensitive adhesive (PSA). One edge of the polarizing member may correspond to one edge of the adhesive member. The display panel unit may include a liquid crystal display panel. The display device can be used for portable products.

With reference to the accompanying drawings, it will be described embodiments of the present invention to be easily implemented by those skilled in the art. As can be easily understood by those of ordinary skill in the art to which the present invention pertains, the following embodiments are merely illustrative of the present invention, and various forms without departing from the concept and scope of the present invention. It can be modified. Where possible the same or similar parts are represented with the same reference numerals in the drawings.

When a section is said to be "on top" of another section, it may be just above the other section or may be accompanied by another section in between. In contrast, when one part is mentioned “right above” another part, no other part is intervened.

It is to be understood that the terms first, second and third are used to describe various parts, components, regions, layers and / or sections, but are not limited to these. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first portion, component, region, layer or section described below may be referred to as the second portion, component, region, layer or section without departing from the scope of the invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite. As used herein, the meaning of “comprising” embodies a particular characteristic, region, integer, step, operation, element, and / or component, and other specific characteristics, region, integer, step, operation, element, component, and / or group. It does not exclude the presence or addition of.

Terms indicating relative space, such as "below" and "above", may be used to more easily explain the relationship of one part to another part shown in the drawings. These terms are intended to include other meanings or operations of the device in use together with the meanings indicated in the drawings. For example, turning the device in the figure upside down, certain parts described as being "below" of other parts are described as being "above" other parts. Thus, the exemplary term “down” includes both up and down directions. The device can be rotated 90 degrees or at other angles, the terms representing relative space being interpreted accordingly.

Unless defined otherwise, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Commonly defined terms used are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.

Embodiments of the invention described with reference to perspective and cross-sectional views specifically illustrate ideal embodiments of the invention. As a result, various modifications of the drawings, for example, manufacturing methods and / or specifications, are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture. For example, regions shown or described as flat may have properties that are generally rough and / or rough. Also, portions shown to have sharp angles may be rounded. Accordingly, the regions shown in the figures are only approximate in nature, and their forms are not intended to depict the exact form of the regions and are not intended to narrow the scope of the invention.

1 schematically illustrates an exploded view of a display device 100 according to an exemplary embodiment. The display device 100 can be used for portable products such as a mobile phone, a PDA, and a PMP.

The display device 100 includes a display panel unit 10 and a light source unit 12. The display device 100 further includes a light guide plate 14, a plurality of optical sheets 16, and a reflective sheet 18 in order to efficiently use the light emitted from the light source unit 12. In addition, a first fixing member 20, a second fixing member 22, and a third fixing member 24 are included to fix and support them.

The display panel unit 10 includes a display panel 101 and polarizing members 104 and 105. For example, the display panel 101 may use a liquid crystal display panel. Other light receiving display panels may be used. The display panel 101 includes a TFT (thin film transistor) panel 1011, a color filter panel 1012, and liquid crystal (not shown) injected between both panels. The TFT panel 1011 faces the color filter panel 1012, and a plurality of TFTs are formed in a matrix form. A data line is connected to the data terminal of the TFT panel 1011, and a gate line is connected to the gate terminal. In the drain terminal, a pixel electrode made of conductive and transparent indium tin oxide (ITO) is formed.

The data line and the gate line of the TFT panel 1011 are connected to the printed circuit board 26 located below the third fixing member 24 through the flexible printed circuit film 102. Therefore, when the electric signal is input from the printed circuit board 26, the electric signal is input to the source terminal and the gate terminal of the TFT. The TFT is turned on or off along the input of the electrical signal, and the electrical signal necessary for pixel formation is output to the drain terminal. The integrated circuit chip 103 is mounted on the TFT panel 1011 to control the display panel 101. The integrated circuit chip 103 generates a plurality of timing signals for applying the data driving signal and the gate driving signals at an appropriate time, and then applies them to the data line and the gate line of the display panel 101, respectively. A protective film 106 is coated around the integrated circuit chip 103 to protect the integrated circuit chip 103.

The color filter panel 1012 is disposed on the TFT panel 1011 opposite to the TFT panel 1011. The color filter panel 1012 is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process, and a common electrode made of ITO is coated on the entire surface thereof. When power is applied to the gate terminal and the source terminal of the TFT and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter panel 1012. The arrangement angle of the liquid crystal injected between the TFT panel 1011 and the color filter panel 1012 is changed by the electric field, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel. The polarizing members 104 and 105 are attached to both surfaces of the display panel 101 to polarize the light passing through the display panel 101. For convenience, the polarizing member positioned below the TFT panel 1011 is called the first polarizing member 104, and the polarizing member positioned above the color filter panel 1012 is called the second polarizing member 105.

The light source unit 12 includes a light source 121 (dotted line) and a flexible printed circuit film 122. The light source 121 provides light to the display panel unit 10. The light source 121 is mounted on the flexible printed circuit film 122 and electrically connected to a wiring pattern (not shown) formed on the flexible printed circuit film 122. The flexible printed circuit film 122 is connected to the printed circuit board 26. Therefore, the light source 121 is driven by receiving a voltage from the printed circuit board. A light emitting diode (LED) may be used as the light source 121. Since the light emitting diode is easily miniaturized, it is suitable for use as a portable product. Other types of light sources can be used.

Light emitted from the light source 121 is incident through the side surface of the light guide plate 14. Light incident on the light guide plate 14 is diffused and guided by the light guide plate 14 to be emitted toward the plurality of optical sheets 16. The plurality of optical sheets 16 straightens and equalizes the light emitted from the light guide plate 14. Reflective sheet 18 is provided below the light guide plate 14 to reflect light to minimize light loss.

As shown in FIG. 1, the first fixing member 20 covers the edge of the display panel unit 10. The second fixing member 22 accommodates the display panel unit 10, the light source unit 12, the light guide plate 14, the optical sheets 16, and the reflective sheet 18. The third fixing member 24 houses the second fixing member 22 and engages with the first fixing member 20.

As shown in FIG. 1, the display device 100 includes an adhesive member 28. The adhesive member 28 is positioned between the display panel unit 10 and the optical sheets 16. As the adhesive member 28, PSA (Pressure Sensitive Adhesive) can be used. Since the PSA is evenly spread by the pressure-sensitive adhesive material therein and becomes adhesive, the PSA is firmly bonded to the second fixing member 22 and the optical sheets 16 so that the display panel unit ( 10) to prevent lifting.

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 after combining the display device 100 of FIG. 1.

As shown in FIG. 2, since the adhesive member 28 is disposed flat on the light source unit 12 and the optical sheets 16, there are no wrinkles. Therefore, the display panel 101 is stably fixed by the adhesive member 28. Since the first polarizing member 104 is positioned on the adhesive member 28, the adhesive member 28 faces the first polarizing member 104. The first polarizing member 104 covers the entire surface of the adhesive member 28. Therefore, the TFT panel 1011 does not directly face the adhesive member 28 by the first polarizing member 104. Therefore, the display panel 101 does not have a portion floating on the adhesive member 28. As a result, the display panel 101 is stably attached onto the adhesive member 28 so that the display panel 101 does not flow well. Therefore, the display panel 101 can be fixed stably.

Furthermore, as shown in FIG. 2, when attaching the first polarizing member 104 to the edge 1011a of the TFT panel 1011, there is no space between the TFT panel 1011 and the adhesive member 28. The display panel 101 can be fixed stably. In addition, since the edge 104a of the first polarizing member 104 corresponds to the edge 281 of the adhesive member 28, the display panel 101 can be stored stably.

Since the second polarizing member corresponds to the entire surface of the adhesive member, the display panel unit can be stably fixed.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

Claims (8)

Display panel unit, A fixing member for fixing the display panel unit, and An adhesive member for bonding the display panel unit and the fixing member to each other Including, The display panel unit includes a polarizing member, and the polarizing member covers the entire surface of the adhesive member. The method of claim 1, The display panel unit, A first panel to which the polarizing member is attached, and A second panel positioned on the first panel And a first panel not directly facing the adhesive member by the polarizing member. The method of claim 2, The polarizing member is attached to the edge of the first panel. The method of claim 2, A light source unit supplying light to the display panel unit, and An optical sheet for condensing light emitted from the light source and supplying the light to the display panel unit The display device of claim 1, wherein the adhesive member is disposed flat on the light source unit and the optical sheet. The method of claim 1, And the adhesive member is a pressure sensitive adhesive (PSA). The method of claim 1, One edge of the polarizing member corresponds to one edge of the adhesive member. The method of claim 1, The display panel unit includes a liquid crystal display panel. The method of claim 1, The display device is used for a portable product.

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