JPS59210477A - Panel type display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a wall-mounted panel type display device, and more particularly to a large panel type display device formed by combining a large number of display panels.

(Prior Art) Display devices using liquid crystal panels, discharge panels, fluorescent display tubes, EL, etc. have been proposed as flat image display means to replace cathode ray tubes.

These display devices usually employ a so-called dot matrix method in which a large number of column electrodes and row electrodes are arranged on a substrate, and signals are selectively applied to each of these electrodes to display the image to be displayed as dots. Therefore, the display panels used for these require space around the periphery to connect the column and row electrodes to external circuits, and those that use a liquid crystal display method require In addition to the above-mentioned space, a space for sealing the liquid crystal is required.Furthermore, in this type of display device, in order to reduce the voltage difference and maintain constant brightness, the drive duty can be lowered and the circuit There is also a design problem in that it is better not to make the display size too large since L simplifies the configuration.

Therefore, in order to obtain, for example, a meter-sized screen using this type of display means, it becomes necessary to arrange many display units in a tiled manner as shown in FIG. A problem arises in that the non-display part a, which is a connection part with an external circuit provided at the periphery of each unit, appears on the display panel like an eye on the board.

Of course, in order to eliminate this inconvenience, for example, the second
As shown in the figure, the connection terminals 2.4 for connecting the column electrodes 1 and the row electrodes 3 to the external electrodes are provided on the side surface of the glass substrate 5.6, while the sealing portion 7 of the liquid crystal 8 is narrowed by design. Then, the distance between the outermost electrodes 1 and 3 and the side edge of the panel is 1/1 of the gap between each electrode tube.
2, but this is difficult in practice. For example, advanced technology is required to pull out the Nesa film to the side of the substrate, or the sealing performance is impaired and the liquid crystal is damaged. This also causes other troublesome problems such as deterioration of characteristics.

(Purpose) The present invention has been made in view of the above problems, and its purpose is to simply add a simple optical member without making any changes to the display units themselves to be arranged. The object of the present invention is to provide a large panel display device that can be constructed as a single continuous image display surface by simply performing the following operations.

(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.

FIG. 3.4 shows an embodiment of the present invention configured as a translucent liquid crystal display panel, with reference numeral 20 in the figure.
2 is a light guiding panel which is a characteristic part of the present invention, and this panel 20 is disposed close to the light source 13, that is, on the front surface side of the liquid crystal panel IO so as to protect the surface thereof, and is described later. The light guide panel 20 is formed into a panel shape as an assembly of light guide tubes 21, and the light guide panel 20 has a side on the back side 24 facing the liquid crystal nozzle 10 having the same width as the effective front width d of the liquid crystal panel 10. Moreover, the side on the front surface 25 side is formed into a substantially trapezoidal shape so as to have the same width as the liquid crystal panel IO itself.

By the way, the light guide tube 21 described above has a column electrode 2 and a row electrode 4.
It is an optical member that guides the light from the light source 13 through the "pixel" and onto the display surface.As shown in Figure 4, it is an optical member with extremely high light transmittance such as high-purity methacrylic resin. It is formed by applying a resin layer or metal vapor deposition layer 23 having a different refractive index on the surface of a rod-shaped body 22 made of a material, and is further formed into a tapered shape with a cross-sectional area corresponding to the area of the horizontal pixel. By converging a large number of light beams, the trapezoidal light guide panel 20 as described above is constructed.

In the figure, reference numeral 11 is a circuit board, 12 is a driver, and 14 is a circuit board.
indicate the respective reflectors.

Therefore, according to the embodiment described above, the light from the light source 13 derived from each pixel is guided by a large number of light guides v21 that spread in a tapered shape toward the display surface, and reaches the display surface to form an image. However, the light guide panel 20 is formed into a trapezoid by these tapered light guide tubes 21, and its wide surface 25 is lined up with the adjacent light guide panels 20 without any gaps, so that the display surface of the panel is formed. Therefore, a continuous image is formed on the surface of the large panel.

FIG. 5 shows another embodiment of the above-described light guide panel and light guide tubes, in which a large number of light guide tubes 31 are connected in a length corresponding to the length of one side of the liquid crystal panel 10 in the column direction. Alternatively, the same figure (A) can be used without plate-shaped light guides 33 for one column in the row direction.
), and then a plurality of plate-shaped light guide tubes 3 formed in this way.
2 by an amount corresponding to the length of the other side of the liquid crystal panel 10, and the back side, that is, the side facing the front side of the liquid crystal panel 10, is compressed from the side in the direction of the arrow, so that the back side is used for effective display of the liquid crystal panel 10. According to this embodiment, the light guide panel 30 can be manufactured with great ease. Note that in this embodiment, the light guide tube 31
The light incident end surface 32 of the is formed into a lens shape.
Even if there is some misalignment between the positions of the pixel and the pixel, the light can be guided accurately.

Yet another embodiment of the invention is shown in FIG.

The light guide panel 40 is composed of optical fibers 41, and the optical fibers 41 are bound with a colorless binder 42.
The back side has the same area as the effective display area of the display panel 10', and the front side has the same area as the display panel 10' itself.According to this embodiment, the light guide panel 40 Manufacturing becomes easier.

(Effects) As explained above, according to the present invention, a panel-shaped optical member consisting of a large number of light guide elements is arranged so that the back surface is the same as the effective display area of the display unit, and the front surface is The entire display surface can be viewed as one continuous screen without making any changes to the individual display units that make up the panel display device. It is now possible to configure it as an image display surface, and since the plate-shaped optical member is superimposed on the display panel, it is possible to configure a large, durable display device by itself without the need for special reinforcing materials. .

[Brief explanation of drawings]

FIG. 1 is a side view of a device showing an embodiment of the present invention in which an example of a large panel type display device is applied to a liquid crystal display panel, and FIGS. 4(a) and 4(b) are light guide panels. 5(A) and 5(B) are a side view and a front view showing another embodiment of the light guide panel, and FIG. 6 is a side view and a front view showing another embodiment of the same panel. FIG. 1.2...Electrode 10...Display unit 20.30.40...Light guide panel 21.31...Light guide tube 41...Optical fiber dream/Fig. 2nd ward $3 figure year 4 figure

Claims (1)

[Claims] In a panel-type display device that uses a large number of display units that adopt an I. A plurality of the optical members are configured such that the front and back surfaces of the member have a size corresponding to the total surface area and effective display area of the display unit, respectively, and the back surface closely faces the front surface of the display unit. A panel type display device, characterized in that each of the panel type display devices is arranged on each of the above-mentioned display units.