JPH0367220A - Display device - 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 [Industrial Application Field] The present invention relates to display elements arranged in a matrix, for example, L
CD (liquid crystal element), EL (electroluminescence)
, a VFD (vacuum fluorescent display), an LBD (light emitting diode), and the like.

[Prior Art] As shown in FIG. 10, a display device having a conventional matrix panel has striped scanning electrodes xO to X3 and signals 1!1YO-Y3, scanning Thf!
D: Active pulses are applied sequentially from xO, and the signal @
Display data is added to iYo to Y3 in synchronization with the active pulse. By repeating this at high speed,
Data is displayed in time division on a matrix panel.

[All to be Solved by the Invention] Such a conventional device uses a two-dimensional, that is, a planar matrix, and when the number of scanning electrodes and signal electrodes is X and Y, respectively, The display of XXY segments (display elements) can be controlled using the control lines. However, in such a device, there is a problem in that as the number of segments increases, the number of control lines increases significantly, and therefore the number of driver terminals and the number of drivers that control the matrix increase.

An object of the present invention is to provide a display device that can control the display of a matrix having a large number of segments with a small number of control lines.

Means for Solving Problem 1] The object of the present invention is to provide display elements arranged in a matrix, signal electrodes provided in each row and connected to the display elements of the row, and a signal electrode arranged in each column. In a display device having scan electrodes provided and connected to the display elements of the column, the display device is divided into a plurality of blocks, and the scan electrodes of the columns corresponding to each other in each block are connected to each other. The signal electrodes in the corresponding rows of each of the display matrices are connected to a plurality of blocks via selection means, each of which becomes conductive when a matrix selection signal for selecting one of the display matrices is applied. This is achieved by a display device characterized in that the divided portions are time-divisionally operated and driven using fewer control lines.

[Operation] The device of the present invention combines a plurality of time-division display matrices and sequentially supplies display signals to each display matrix in a time-division manner, thereby displaying an extremely large number of display elements with a small number of control lines. segments can be controlled.

[Example] Next, examples of the present invention will be described.

A three-dimensional matrix as shown in FIG. 1 is constructed by adding a height in the ZIl11 direction to the conventional two-dimensional matrix extending in the X-axis direction and Y-axis direction shown in FIG. 10. In the example shown in Figure 1, 12 control lines result in 64
segments can be controlled.

FIG. 2 shows a matrix of four stacked blocks in FIG. A line is necessary.

In the example of FIG. 2, if Z matrices each having X scanning electrodes and Y signal electrodes are stacked, it is possible to control XxYXZ segments with X+y+z control lines. Fig. 3 shows a block diagram of Fig. 7, which is a two-dimensional matrix. Furthermore, the height direction is added to Fig. 3, and Fig. 4 shows a three-dimensional matrix arranged on the same plane.
FIG. 5 shows a four-dimensional matrix arranged on the same plane with the height direction added to the figure. In this way, by increasing the number of dimensions, it becomes possible to efficiently control a large number of segments using a small number of control lines. Table 1 and FIG. 6 show how the maximum number of segments that can be controlled when the total number of electrodes, that is, the total number of control lines is the same, changes depending on the number of dimensions of the matrix. In Table 1 and Figure 6, the number of dimensions of the conventional planar matrix is 2.
It is defined as

Table 1 FIG. 8 shows an example of the structure of the matrix shown in FIG. 2.

In the example of FIG. 8, the matrix has 16 segments, and these segments correspond to scan electrodes xO to x
The liquid crystal display panel is formed by combining four blocks of liquid crystal display matrices shown in FIG.

Figure 9 shows an example of the configuration of a liquid crystal display panel that uses TPT (thin film transistor) type to enable three-dimensional time-division operation. In Figure 0, 1 is a TPT, 2 is a capacitive liquid crystal element, One TPT and one liquid crystal element constitute one segment. Each T P has scanning electrodes xO to x3 for supplying scanning pulses supplied from the outside to the liquid crystal element.
connected to the source or drain of each TP
The gate of T is connected to the output of AND gate 3. This AND gate functions as a selection means for selecting one block of display matrices to which externally transmitted display data is to be supplied from among the four blocks of display matrices. The first input of each AND gate is connected to one of the voltages @ZO to Z3 for supplying an externally supplied matrix selection signal to the liquid crystal element, and the second input is connected to an externally supplied display signal. It is connected to one of the signal electrodes YO to Y3 for supplying data to the liquid crystal element. The matrix selection signals ZO to Z3 become high level in order, and when the matrix selection signal becomes high level, the AND gate passes the display data, but otherwise cuts it off. Therefore, display data can be displayed on a four-block display matrix in a time-division manner.

In this way, since each display matrix serves both as a signal electrode and a scanning electrode, the total number of electrodes in the liquid crystal display panel is 12, and therefore 64 segments can be displayed using 12 control lines. can be controlled.

The display elements that make up the matrix, LCD, EL
, VFD, LED, etc. can be used.

[Effects of the Invention] As explained above, in the display device of the present invention, the display device is divided into a plurality of blocks, and the scanning electrodes in corresponding columns of each block are connected to each other, and each display matrix A portion in which signals '@poles of mutually corresponding rows are divided into a plurality of blocks via selection means that respectively become conductive when a matrix selection signal for selecting one of the display matrices is applied. Because it operates in a time-division manner, the number of control lines between the display device and the external control device for supplying the necessary signals to the device can be reduced, and the number of control lines used in the control LSI used in the control device can be reduced. This has the effect of downsizing the entire device and reducing manufacturing costs by reducing the number of control LSIs used.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the three-dimensional matrix structure of the present invention,
Figure 2 is an explanatory diagram when the matrices in Figure 1 are arranged on the same plane, Figure 3 is a block diagram of a two-dimensional matrix,
Figure 4 is a block diagram of a three-dimensional matrix, Figure 5 is a block diagram of a four-dimensional matrix, and Figure 6 shows how the maximum number of segments that can be controlled by the number of dimensions of the matrix is determined when the total number of electrodes is the same. Figure 7 is an explanatory diagram of one block of TFT type liquid crystal display matrix, and Figure 8 is an explanatory diagram of a liquid crystal display panel formed by combining four blocks of the display matrix of Figure 4. 9 is a configuration example of the liquid crystal display panel shown in FIG. 8, and FIG. 10 is an explanatory diagram of a conventional two-dimensional matrix structure. xO~×3...Scanning electrode, YO~Y3...Signal electrode, ZO~Z3...Matrix selection electrode, 1...TP
T, 2...Liquid crystal element, 3...And gate.

Claims (1)

[Claims] Display elements arranged in a matrix, signal electrodes provided in each row and connected to the display elements in the row, and scanning electrodes provided in each column and connected to the display elements in the column. The display device is divided into a plurality of blocks, scanning electrodes in corresponding columns of each block are connected to each other, and signal electrodes in corresponding rows of each display matrix are connected to each other. When a matrix selection signal for selecting one of the display matrices is applied, the parts divided into a plurality of blocks are operated in a time-division manner and driven with a small number of control lines through selection means that become conductive. A display device characterized by: