WO2003034376A1

WO2003034376A1 - Selfluminous display

Info

Publication number: WO2003034376A1
Application number: PCT/JP2002/010769
Authority: WO
Inventors: Masahiro Shioji
Original assignee: Sanyo Electric Co., Ltd.
Priority date: 2001-10-17
Filing date: 2002-10-16
Publication date: 2003-04-24
Also published as: JP2003122264A

Abstract

A selfluminous display comprising a flexible substrate connected with a terminal array arranged in the vicinity of the side edge of a selfluminous display panel. The terminal array is provided on the rear side of the selfluminous display panel and the flexible substrate extends inward directly from the joint with the terminal array substantially along the rear surface of the selfluminous display panel. With such an arrangement, a small and thin selfluminous display making the best use of the advantages of the selfluminous display panel is obtained.

Description

Self-luminous display device

Technical field

The present invention relates to a signal transmission joining with an electrode terminal row connected to a driver circuit.

The present invention relates to a self-luminous display device having a feature in the form of a flexible substrate for use.

Conventionally, a liquid crystal display device (6) using a liquid crystal display panel (61) shown in FIG. 5 has been frequently used as a thin display device used for image display in digital still cameras / video cameras and the like. In recent years, instead of the liquid crystal display panel (61), a self-luminous display device (2) having a self-luminous display panel (4) using an organic electroluminescent element (EL element) as shown in FIG. Are also used. Since the liquid crystal display panel (60 does not generate light, the liquid crystal display device (6) has a backlight (7) as a light source as shown in Fig. 5. The self-luminous display device (2) has Since such a backlight is not required, it is harmful that the self-luminous display device (2) can be configured to be lighter and thinner than the liquid crystal display device (6). The flexible substrate (5) prevents the self-luminous display device (2) from being thinned.

In the liquid crystal display device (6) shown in FIG. 5, an electrode terminal row (8) connected to a driver circuit for driving the liquid crystal display panel (61) is arranged near the side edge of the liquid crystal display panel (61). Have been. A flexible board (5) on which a plurality of lines for transmitting video signals, control signals, and the like to the liquid crystal display panel (61) is connected to the electrode terminal row (8). The flexible board (5) is on the side of the liquid crystal display panel (61) The back side of the backlight (7) is bent by approximately 180 degrees on the side so as to avoid the thickness of the backlight (7) from the joint (51) joined to the electrode terminal row (8). Has been drawn to.

As shown in FIG. 6, in the self-luminous display device (2), similarly to the liquid crystal display device (6), the electrode terminal row (8) connected to the driver circuit is on the side of the self-luminous display plate (4). It is located near the edge. Therefore, as in the case of the liquid crystal display device (6), the flexible substrate (5) is curved on the side of the self-luminous display panel (4), and the flexible substrate (5) is connected to the self-luminous display panel (4) from the joint (51). It is pulled out to the back.

The maximum thickness of the self-luminous display device (2) is determined by the diameter L of the arc-shaped curved portion (50) of the flexible substrate (5). In other words, the longer the diameter L, the thicker the housing for accommodating the self-luminous display device (2), or the larger the space occupied by the self-luminous display device (2) in the housing. Therefore, the diameter L of the curved portion (50) is preferably small. When the diameter L of the curved portion (50) decreases, the portion of the flexible substrate (5) protruding from the side of the self-luminous display panel (4) (downward in FIG. 6) also decreases. (2) is downsized.

However, if the diameter L of the curved portion (50) is too small, the stress applied to the printed wiring may increase, and the wiring may be disconnected. Therefore, there is a limit to reducing the diameter L of the curved portion (50). Under such restrictions, the advantage that the self-luminous display panel (4) is thin in the self-luminous display device (2) cannot be fully utilized. For example, if the liquid crystal display device (6) shown in FIG. 5 and the self-luminous display device (2) shown in FIG. 6 use a flexible substrate (5) having exactly the same configuration, the backlight (7) Regardless of the presence or absence of these, the thicknesses of these devices (2) and (6) are substantially the same.

As described above, the conventional self-luminous display device (2) is sufficiently thin and small. The thickness and size of the device were almost the same as those of the liquid crystal display device (6). The present invention provides a self-luminous display device that solves this problem. Disclosure of the invention

According to the present invention, in a self-luminous display device in which a flexible substrate is connected to a terminal row arranged near a side edge of the self-luminous display panel, the terminal row is provided on the back side of the self-luminous display panel. The flexible substrate extends substantially along the back surface of the self-luminous display panel directly and inward from a connection portion with the terminal row.

According to the present invention, the flexible substrate is drawn out to the back side of the self-luminous display panel without forming a curved portion. Therefore, the flexible substrate can be brought close to the back surface of the self-luminous display panel in the vicinity of the terminal row without causing disconnection of the wiring. In addition, since there is no curved portion, the flexible substrate does not protrude to the side of the self-luminous display panel. As described above, according to the present invention, a thin and small self-luminous display device utilizing the advantages of the self-luminous display panel can be obtained. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a video camera provided with the self-luminous display device of the present invention. FIG. 2 is a perspective view of an image display unit of the video camera shown in FIG.

FIG. 3 is a partial cross-sectional view of the self-luminous display device of the present invention,

FIG. 4 is a rear view of a self-luminous display device of the present invention and a peripheral portion thereof,

Fig. 5 is a side view of a conventional liquid crystal display,

FIG. 6 is a side view of a conventional self-luminous display device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a video camera provided with a self-luminous display device (2) of the present invention. The image display unit (11) displays an image obtained from the imaging unit (Π) during the imaging operation, a recorded image stored in a recording medium (not shown), and the like. As shown in FIG. 1, the image display section (11) is used in a state of being arranged substantially perpendicular to one side surface (14) of the main body section (1). Since the image display unit (11) is rotatably attached to the video camera body (1) via a hinge mechanism (13), the image display unit (11) is rotated about the vertical axis from the state shown in FIG. By rotating (11), the image display portion (11) can be stored in the concave portion (15) formed on the side surface (14). Further, a cylindrical member (35) described later is accommodated in the protruding portion (34) formed on the image display section (11), and the cylindrical member (35) includes a hinge mechanism (13). It is supported rotatably. Therefore, the image display section (11) can rotate around the horizontal axis.

FIG. 2 is a perspective view of the image display unit (11) viewed from the rear of the main unit (1). The image display section (11) includes a self-luminous display device (2) and a housing (3) for accommodating the display device. A rectangular opening (32) is opened in the housing (3), and the image display surface of the self-luminous display panel (4) is exposed from the opening (32).

FIG. 3 is a partial cross-sectional view of the image display unit (11) taken along a plane including the line AA shown in FIG. The self-luminous display device (2) includes a self-luminous display panel (4) using an EL element and a flexible substrate (5) connected thereto. The self-luminous display panel (4) is configured based on a transparent substrate (41) located on the side of the opening (32). On the transparent substrate (41), a plurality of transparent column electrodes (42) are formed in the vertical direction. A hole transport layer (43) is formed so as to cover the column electrode (42), and a light emitting layer (44) and an electron transport layer (45) are further laminated. On the electron transport layer (45), a plurality of row electrodes (46) are formed in a lateral direction. Then, cover the electron transport layer (45) and the brazing electrode (46). An insulating protective layer (47) is formed on the substrate.

When a voltage is applied between the column electrode (42) and the row electrode (46), holes are injected from the column electrode (42) into the light emitting layer (44) through the hole transport layer (43).電子 Electrons are injected from the electrode (46) into the light emitting layer (44) through the electron transport layer (45), and when these holes and electrons are combined in the light emitting layer (44), the light emitting layer (44) is formed. The excited molecules are excited and light is emitted when these molecules change from the excited state to the ground state, and the emitted light is emitted outside through the transparent substrate (41). The intersection of the row electrode (46) becomes a display pixel The row electrode (46) is sequentially scanned, and a voltage signal corresponding to each pixel on the scanned row electrode (46) is applied from the column electrode (42). Thus, the self-luminous display panel (4) displays an image.

In order to prevent the electrodes (42) and (46) from being oxidized and peeled by moisture in the atmosphere and from being damaged by impact, the laminated structure composed of the column electrode (42) and the protective layer (47) is made of metal. Protected with cap (48). The cap (48) is joined to the back of the transparent substrate (41) by a seal (49). The space inside the cap (48) is filled with nitrogen.

On the back surface of the transparent substrate (41), a terminal row (8) is provided near the lower side (41a) of the transparent substrate (41). Each terminal constituting the terminal row (8) is connected to a driver circuit (91) for driving a column electrode (42) or a driver circuit (92) for driving a row electrode (46) via a wiring (90). (See Figure 4). The end portion (51) of the flexible board (5) is joined to the terminal row (8). At this joint (51), each wiring (not shown) printed on the flexible substrate (5) is joined to one of the terminals constituting the terminal row (8).

The flexible substrate (5) is formed along the cap (48), that is, along the back surface of the self-luminous display panel (4), directly and inwardly from the joint (51) without forming a curved portion ( That is, the self-luminous display panel (4) directly from the joint (51) 9

6

Toward the center of the In FIG. 3, the flexible substrate (5) connected to the self-luminous display panel (4) as in the conventional device is indicated by a dashed line. As is clear from FIG. 3, the curved portion (50) of the flexible substrate (5) does not exist, and the flexible substrate (5) extends directly from the joint (51) toward the cap (48). The thickness of the self-luminous display device (2) to which the present invention is applied is reduced. Furthermore, the thickness of the housing (3) of the image display section (11) is also reduced. In addition, since the curved portion (50) does not protrude below the self-luminous display device (2), the vertical length of the self-luminous display device (2) and the vertical length of the housing (3) are further reduced. The length is getting shorter. As described above, according to the present invention, a thin and small self-luminous display device (2) utilizing the advantages of the self-luminous display panel (4) can be obtained.

FIG. 4 is a rear view of the self-luminous display device (2) as viewed from the front of the main body (1). This figure also shows the periphery of the self-luminous display device (2). For the sake of explanation, in the figure, the right portion of the cap (48) of the self-luminous display panel (4) is omitted. The flexible substrate (5) has a substantially L-shape. After extending upward from the joint (51) with the terminal row (8), the flexible substrate (5) faces the body (1) of the video camera. bent. The flexible board (5) is connected to the auxiliary flexible board (36) via the relay connector (55). The auxiliary flexible substrate (36) is fixed to the housing (3) of the image display unit U1), and is inserted into a cylindrical member (35) rotatably supported by the hinge mechanism (13). I have. The auxiliary flexible board (36) is connected to a control circuit board (not shown) of the self-luminous display device (2) arranged in the main body (1). Note that this control circuit board may be arranged in the housing (3). In other words, a configuration may be adopted in which the control circuit board and the terminal row (8) are connected using the first flexible board, and the control circuit board and the relay connector section (55) are connected using the second flexible board. . Even in this case, The benefits of Ming are still available.

In carrying out the present invention, the self-luminous display panel (4) is not limited to the type using the EL element. Further, the spontaneous optical display device (2) of the present invention is not limited to the image display unit (11) of the video camera as in the above-described embodiment, but also includes a display connected to a convenience store and information display of various electric devices. It may be used for parts, etc., and its use is not particularly limited. Industrial applicability

The self-luminous display device of the present invention is formed thin and small by taking advantage of the self-luminous display plate because no curved portion is formed on the flexible substrate connected to the device.

Claims

The scope of the claims

1. In a self-luminous display device in which a flexible substrate is connected to a terminal row arranged near a side edge of the self-luminous display panel,

The terminal row is provided on the back side of the self-luminous display panel,

The self-luminous display device is characterized in that the flexible substrate extends substantially along the back surface of the self-luminous display panel directly and inward from the joint with the terminal row.

2. The self-luminous display device according to claim 1, wherein the self-luminous display panel uses an EL element.

3. A video camera using the self-luminous display device according to claim 1 for an image display unit.