JP2007192977A - Tiling display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology of processing joint portions in a way as to make these portions inconspicuous as there are cases where the joints are generated in a tiling display formed by lining up a plurality of unit panels in a tile form, and the degradation in display quality is resulted by the influence of non-display regions existing in the peripheral edges of the unit panels in the tiling display. <P>SOLUTION: Panels consisting of organic LEDs are installed to the join portions of the plurality of the unit panels. Since the material constituting the organic LEDs are all solids, sealing regions which are essential with liquid crystals etc., are not needed and the materials are merely necessitated to be so processed that the infiltration of the moisture being the factor for the deterioration of the organic LEDs can be suppressed. The pixels can be arranged up to the ends of the peripheral edges in this way and therefore, the effective concealing of the joints is possible. Further, when a number of sheets of the unit panels are used by providing gaps between the unit panels, the electrical connection between the unit panel in the central part and the peripheral circuit can be performed by passing the wiring of the central part in the gap between the unit panels. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tiling display configured by arranging a plurality of unit panels such as a plasma display panel, a liquid crystal display panel, a field emission display panel, and a CRT.

  In recent years, the demand for large-screen displays has been increasing, and accordingly, there has been a demand for larger screens for displays using display elements such as plasma displays, liquid crystal displays, field emission displays, and CRTs.

  When an attempt is made to realize a large screen display with a single display panel, problems such as mechanical strength and display unevenness due to an increase in electrode resistance occur. In order to cope with these problems, it is an effective method to realize a large screen by forming display elements in a panel shape and arranging a plurality of the display elements in a tile shape.

  In this case, for example, it is described in Patent Document 1 in order to enable display even in a non-display area portion that is formed to seal a liquid crystal material and is recognized as a seam, which is positioned at the peripheral portion of the liquid crystal. Thus, a structure is disclosed in which LEDs are arranged in the non-display area portion so as to match the display pitch in the panel portion, and the joint portion between tiles seen on the image is not conspicuous.

  In addition, as described in Patent Document 2, a unit panel is formed using an organic EL (organic LED), and a black matrix is arranged in a joint region between the unit panels, so that the tiles seen on the image can be seen. A method is disclosed in which the seam portion of the frame is made inconspicuous.

JP 2004-191487 A JP 2004-326130 A

  Here, when a tiling display is formed using the technique disclosed in Patent Document 1, when changing the screen size or the pixel pitch, for example, changing the arrangement of LEDs arranged in the non-display area portion, etc. It is necessary to make changes including the design of each unit panel itself, particularly the design of the peripheral part of the unit panel. For this reason, a large man-hour is required for changing the design of the unit panel. Therefore, it is practically difficult to change the area of the tiling display by changing the dimensions of the unit panel.

  Furthermore, since the LED is a point light source, a light diffusing portion is required to improve visibility, and problems such as increased process cost and increased cost due to process complexity are also included.

  Moreover, when forming a tiling display using the technique disclosed in Patent Document 2, it is necessary to use a large area organic LED panel as a unit panel and arrange it in a tile shape. In the organic LED, the area of the non-display portion generated at the peripheral portion of the unit panel can be suppressed to be negligible. However, in order to cope with a large area display using only the organic LED technology, the organic LED technology has technically unskilled points regarding, for example, suppression of point defects. It is difficult to form.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a technique for processing a seam portion inconspicuously using a technically mature display panel.

  <Configuration 1> In order to solve the above-mentioned problem, the tiling display of the present invention is a tiling display in which a plurality of unit panels each having a non-display area at the periphery are arranged in a tile shape, and adjacent to each other. A display sheet using an organic LED serving as a surface light source is disposed so as to cover the non-display area between the unit panels.

  According to this structure, the non-display part of the peripheral part of a unit panel can be covered with the display sheet using organic LED. Moreover, since the total display area by a non-display area | region is small compared with a display area, generation | occurrence | production of a defect can be suppressed even if it uses organic LED with a technically immature point as a display apparatus.

  In addition, since the organic LED is made of solid, the processing of the peripheral portion of the unit panel may be performed so as to be able to suppress the intrusion of moisture that causes deterioration of the organic LED. The non-display portion to be suppressed can be suppressed to an almost negligible amount. Therefore, the seam between the display sheet newly generated when covering the non-display portion and the unit panel can be reduced.

  Furthermore, since the organic LED is a surface light source, it is not necessary to place a diffusing device for scattering light on the organic LED when mounting, and the display sheet has a wide viewing angle characteristic with a small number of steps. Can do.

  In addition, even when the dimensions of the unit panel are changed, it is possible to cope with the change in the mask size used in the photolithographic process for forming the organic LED located at the peripheral edge of the unit panel according to the change ratio. The dimensions of the unit panel can be easily changed.

  <Configuration 2> The tiling display of the present invention is characterized in that the unit panel is any one of a plasma display, a liquid crystal display, a field emission display, and a CRT.

  According to this configuration, the organic LED is used to cover a non-display area around the unit panel that is generated parasitically when any of a plasma display, a liquid crystal display, a field emission display, and a CRT is used as the unit panel. By installing the display sheet, the visibility at the joint portion of each unit panel can be improved.

  <Configuration 3> The tiling display of the present invention described above is characterized in that the arrangement pitch of the light emitting portions of the organic LEDs arranged on the display sheet is aligned with the arrangement pitch of the unit display elements of the unit panel. To do.

  According to this configuration, since the arrangement pitch of the unit panel and the organic LED is made uniform, the image size between the unit panels and the image size in the display sheet can be made uniform. Accordingly, it is possible to suppress image distortion that occurs when an image spans between the unit panel and the display sheet.

  <Configuration 4> In addition, the tiling display of the present invention described above is the organic LED located in the display sheet region, or the wiring for connecting the unit panel and the drive circuit of the unit panel between the unit panels. And a gap for passing wiring for connecting the organic LED drive circuit to the organic LED drive circuit.

  According to this configuration, the wiring between the organic LED and the drive circuit for driving the organic LED can be connected through the gap between the unit panels. Therefore, it is possible to mount the display sheet without routing the wiring on the active surface side, which causes deterioration in image quality.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings.

(First embodiment)
In the first embodiment, FIG. 1 is a plan view of a unit liquid crystal panel comprising a liquid crystal color display constituting the tiling display according to the first embodiment of the present invention, and FIG. 2 is an A of the unit liquid crystal panel shown in FIG. It is sectional drawing which follows -A '.

  In a unit liquid crystal panel 10 using a color liquid crystal panel, a plurality of pixels 11 each having a set of red (R), green (G), and blue (B) are arranged in a matrix. On the active surface of the thin film transistor substrate 13, pixel electrodes 12a to 12i driven by thin film transistors or the like are formed in a matrix.

  A color filter substrate 15 on which the common electrode 16 and the color filters 18 a to 18 i are formed is provided so as to face the active surface of the thin film transistor substrate 13. A liquid crystal 44 is sealed between the thin film transistor substrate 13 and the color filter substrate 15.

  In order to seal the liquid liquid crystal 44, a sealing region 14 using a sealing material 19 such as a thermosetting resin is formed in the peripheral portion of the unit liquid crystal panel 10. Since the liquid crystal 44 does not exist in the sealing region 14, the pixel 11 is not formed.

  For this reason, when the unit liquid crystal panels 10 are arranged in a matrix, a region in which no pixels exist is generated.

  Further, when a plasma display panel, a field emission display type panel, or a CRT is used as a unit panel, a sealing region for maintaining a vacuum state is required at the peripheral portion. Therefore, as in the case where the unit liquid crystal panel 10 is used as the unit panel, a region where no pixel exists at the peripheral edge is formed.

  On the other hand, when an organic LED is used, since the materials constituting the organic LED such as a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer are all solid, there is almost no need for a sealing region. Since it is only necessary to be processed so as to suppress the intrusion of moisture as a factor, pixels can be arranged up to the edge of the peripheral edge.

  FIG. 3 is a plan view of a tiling display in which two unit liquid crystal panels are arranged, and FIG. 4 is a cross-sectional view taken along B-B ′ of the tiling display shown in FIG. 3.

  The organic LED panel 33 is disposed so as to be sandwiched between the liquid crystal display region 31 and the liquid crystal display region 32. Between the unit liquid crystal panel 41 using the color liquid crystal panel and the unit liquid crystal panel 42, a gap is formed as shown in FIG. The unit liquid crystal panel 41 and the unit liquid crystal panel 42 are configured to form an image by controlling the light transmittance by the liquid crystal 44 and the liquid crystal 45, respectively.

  By passing the wiring 43 for driving the organic LED panel 33 through this gap, it is possible to drive the organic LED panel 33 without generating shadows or the like due to the wiring in the display screen of the tiling display 30. Become.

  The thickness of the organic LED panel 33 is as thin as about 0.3 mm, for example, and shadows and the like are not noticeable even when viewed from an oblique direction, so that the image quality of the tiling display 30 can be kept high.

  Further, since the area displayed on the organic LED panel 33 is narrow, it is difficult for image quality degradation to occur due to wiring resistance or the like. Therefore, image quality can be maintained even when passive matrix driving with a simple wiring configuration is used, and a high yield can be secured when the organic LED panel 33 is formed. Further, when a higher image quality is desired, the organic LED panel 33 may be driven by an active matrix.

  In addition, when changing the dimensions of the unit liquid crystal panels 41 and 42, a photomask formed so as to match the change magnification of the unit liquid crystal panels 41 and 42 with the photomask used in the manufacturing process of the organic LED panel 33 is used. Yes. In this case, since the dimensions of the organic LED panel 33 can be changed without changing the manufacturing process, it is possible to flexibly cope with the change in the dimensions of the unit liquid crystal panels 41 and 42.

  In addition, it is preferable from the viewpoint of image quality that the arrangement pitch of the pixels 11 used in the unit liquid crystal panel 41 is equal to the arrangement pitch of the pixels used in the organic LED panel 33, and there is no problem at the boundary between the unit liquid crystal panel 41 and the unit liquid crystal panel 42. It is possible to provide the tiling display 30 with more ease of continuity.

(Second Embodiment)
As a second embodiment, an example in which a tiling display is configured by arranging nine unit liquid crystal panels composed of liquid crystal color displays in a matrix as shown in FIG.

  Here, it arrange | positions so that a space | gap may be formed between each panel of unit liquid crystal panel 51a-51i similarly to 1st Embodiment.

  When the unit liquid crystal panels 51a to 51i are arranged as shown in FIG. 5, the organic LED panel 52d or the organic LED panel that is not in contact with the periphery of the tiling display 50 among the organic LED panels 52a to 52h constituting the tiling display 50. 52g is generated.

  In this case, the wiring for connecting the organic LED panel 52d and its drive circuit is passed through the wiring by covering the organic LED panel 52a so as to sew the gap between the unit liquid crystal panel 51a and the unit liquid crystal panel 51b, for example. The tiling display 50 can be configured without creating a shadow. The organic LED panel 52g can be similarly processed.

  Further, by arranging the wirings of the organic LED panels 52a to 52h so as to sew the gaps of the unit liquid crystal panels 51a to 51i, the organic LED panels 52a to 52h and the unit liquid crystal panels 51a to 51i caused by the height of the wiring are arranged. A step can be suppressed.

  For this reason, even when the multi-unit liquid crystal panels 51a to 51i are used, the tiling display 50 is configured by suppressing the level difference from the organic LED panels 52a to 52h to the thickness (for example, about 0.3 mm) of the organic LED panels 52a to 52h. can do. Therefore, the display quality of the tiling display 50 can be maintained in a high state.

  Moreover, since the organic LED panels 52a to 52h are self-luminous devices, unlike the case of using a liquid crystal panel that operates as a light valve, it is not necessary to receive light from the inactive surface side of the organic LED panels 52a to 52h. . Therefore, for example, wiring or the like can be passed through the non-active surface side of the organic LED panels 52a to 52h without degrading the display quality of the tiling display 50.

  For example, the wiring for driving the unit liquid crystal panel 51e located at the center is arranged so that the gap formed between each of the unit liquid crystal panels 51a to 51i, or the region covered with the organic LED panels 52a to 52h. By arranging them in such a manner, generation of unnecessary shadows and the like can be prevented, and high display quality can be maintained.

  In addition, although the example which used the liquid crystal panel as a unit panel was demonstrated to 1st Embodiment and 2nd Embodiment so far, this is a unit panel using other techniques, such as a plasma display, a field emission display, and CRT. It may be used.

The top view of the unit liquid crystal panel which consists of a liquid crystal color display. Sectional drawing which follows A-A 'of the unit liquid crystal panel shown in FIG. The top view of a tiling display using two unit liquid crystal panels. Sectional drawing which follows B-B 'of the tiling display shown in FIG. The top view of the tiling display which has arrange | positioned nine unit liquid crystal panels in the matrix form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Unit liquid crystal panel, 11 ... Pixel, 12a-i ... Pixel electrode, 13 ... Thin-film transistor substrate, 14 ... Sealing area | region, 15 ... Color filter substrate, 16 ... Common electrode, 18a-i ... Color filter, 19 ... Sealing 30 ... Tiling display, 31 ... Liquid crystal display area, 32 ... Liquid crystal display area, 33 ... Organic LED panel, 41 ... Unit liquid crystal panel, 42 ... Unit liquid crystal panel, 43 ... Wiring, 44 ... Liquid crystal, 45 ... Liquid crystal, 50 ... Tiling display, 51a-51i ... Unit liquid crystal panel, 52a-52h ... Organic LED panel.

Claims (4)

A tiling display in which a plurality of unit panels having a non-display area at the periphery are arranged in a tile shape,
A tiling display comprising a display sheet using an organic LED serving as a surface light source so as to cover the non-display area between adjacent unit panels.   The tiling display according to claim 1, wherein the unit panel is one of a plasma display, a liquid crystal display, a field emission display, and a CRT.   3. The tiling according to claim 1, wherein an arrangement pitch of light emitting portions of the organic LEDs arranged on the display sheet is aligned with an arrangement pitch of unit display elements of the unit panel. display. A wiring for connecting the unit panel and the drive circuit of the unit panel or a wiring for connecting the organic LED located in the display sheet region and the drive circuit of the organic LED is passed between the unit panels. The tiling display according to any one of claims 1 to 3, wherein a gap portion is provided between the unit panels.

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