JPS59193487A - Dot matrix display unit - 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 The present invention relates to a dot matrix display device.

Conventionally, the shape of the pixel which is a component of the display screen of a dot matrix display device has been rectangular or circular. For example, in a liquid crystal display panel, the X signal line is on the upper glass substrate, and the Y signal line is on the lower glass substrate. constitute a pixel piece. When displaying characters and graphics on such a dot matrix display device, there is a limit to the expressive power of the image display.

When the number "2" is expressed using a conventional dot matrix, the font will be as shown in FIG. 1(A).

(A) shows the assembly of a character using pixel pieces. (4J
is an expression in positive display, and (A') is an expression in negative display. As is clear from the example in FIG. 1, (A) (g).

Parts (A) and (T) are intended to express a curved line, but since the adjacent pixel pieces are connected by point contact, this is an undesirable expression from a design perspective. For example, in the case of positive display like (A'), (A), (
The result is that the discontinuity of the part (A “
), it will give the impression that the part (7) is cut off by the black part of the background.In order to improve the tethering property, as shown in JP-A-55-81387, [There have been attempts to shift the intersection angle of the X and Y signal lines, but the above problem has not been solved.

The present invention has been made in view of these points.An object of the present invention is to provide a dot matrix display device that can continuously express diagonally shaded portions of characters and figures.

Further, the dot matrix display device according to the present invention is composed of a large rectangular pixel piece, and the large pixel piece is composed of four triangular small pixel pieces divided by two diagonals of the rectangle. It is characterized by

FIG. 1(B) shows the configuration of each pixel piece when the number "2" is expressed using the dot matrix display device according to the present invention. (B') is a positive display, and (B'') is a negative display.As is clear from the drawing,
Compared to the case (A), the diagonal lines can be expressed continuously, resulting in a more beautiful font.

An embodiment in which the present invention is applied to a liquid crystal active panel will be described. Figure 2 shows the structure of a small pixel piece. The part surrounded by the broken line 01 corresponds to one small pixel piece, and 17.2 is a static memory circuit that holds the information to be displayed on that small pixel piece. A signal 6 for controlling the selection of this pixel and a data signal 4 to be written are input to this memory circuit. Specified information is written to each pixel by a command from an external circuit, and is held, and the data does not change until it is rewritten again. 5 is a circuit that uses data 6 from the memory circuit to control a signal applied to the liquid crystal drive electrode formed in the second part of each pixel; 7 is a drive signal guided to each pixel, and 8 is a control circuit. The signal is connected to the liquid crystal layer 9 above the pixel. 10 is an input signal to the upper panel.

An example of the overall configuration of a panel having such small pixel pieces will be explained with reference to FIG. The large square pixel pieces 11 arranged in a matrix form are made up of four triangles divided by their diagonals, and each triangle (12 parts) is a small pixel piece.The small pixel piece 12 is basically Generally, six input signals are required. As mentioned when explaining the pixels in FIG. 2, regarding the memory circuit, it is first necessary to select a pixel, and this is done by decoding the external signal 13 by the circuit 14 in FIG. A piece is selected. Further, the data signal input to the memory circuit of each pixel is input from the outside to the circuit 16 as shown in 15, and is sent to each pixel with the help of a signal 17 also from the outside. In this way, the pixels to be written are selected by the input signals 13 and 15, and the timing thereof is controlled by the clock signals 18 and 19. The circuit shown at 20 controls the signals routed to the drive signal control circuit within the pixel, and in its simplest form it sends the same signal to each pixel as is applied to the top panel.

Hereinafter, a specific circuit for displaying black and white binary values, which is most suitable for displaying character/graphic information, will be explained. 2
In order to display a value, it is sufficient to hold one bit of data in each pixel. Each small pixel piece is designated as rOJ or "1" by external writing, and this information is used to control the signal of the liquid crystal drive electrode. FIG. 4 shows the circuit structure of one large pixel piece, which consists of electrodes of four small square pieces numbered 21 to 24. 25 to 28 are data signal input signals, 29 is a large pixel piece selection signal,
This signal is used to control writing. Ro1
, 2 are a clocked inverter and an inverter that constitute a latch.

Next, a circuit for controlling drive electrode signals using the data of the above-mentioned memory circuit will be described.The broken line 33 is the common signal supply line. A 52 Hz square wave is normally used as this common signal. This signal is not only applied to transparent electrodes formed throughout the Dobe panel, but also not guided into each pixel. The input signals of the clocked inverters in filters 4 and 35 are controlled by the data in the memory circuit to open and close them. Based on the information written in Lunch, through Ro6's contact, 2
Either a common signal or an inverted common signal is supplied to the 'electrode of the 4th small pixel piece, and black and white of the liquid crystal is determined.

In this embodiment, a liquid crystal panel having a static memory circuit in each pixel has been described, but the present invention is also applicable to a liquid crystal panel having a simpler memory circuit. As stated in claim 1, the present invention is characterized in that a small pixel piece that is triangular in visual angle is used to represent a hatched part of a character or figure. It is not necessary that the pixel electrode be a mathematically accurate triangle; it is sufficient that the pixel electrode has a regular square shape when viewed visually.

As mentioned above, the essence of the present invention is to provide a new design to the shape and arrangement of pixel electrodes, and its application is not limited to liquid crystal active panels, but also electrochromic displays, plasma displays, It is applicable to all dot matrix display devices such as fluorescent display tubes, electroluminescent displays, and light emitting diodes.

In general, with dot matrix display devices, if the dot size is reduced, it becomes possible to express finer details, but this increases the cost due to the increase in the number of connections, and there are industrial limits to miniaturizing the display device. Conventionally, it has been difficult to improve the day-in performance of characters and graphics because of the problems associated with the dot matrix display device of the present invention. ′() makes it possible to efficiently improve design without the need to extremely miniaturize the dot size or increase the number of connections in proportion to the increase in the number of dots. It can provide high quality images for displaying kanji and animation.

[Brief Description of the Drawings] Figures 1 (A), (A'), (t,,'') are diagrams showing examples of display by a conventional dot matrix display device i''j, and Figure 1 (B), ( B') and (B") are diagrams showing display examples by the dot matrix display device according to the present invention, FIG. 2 is a block diagram of small pixel pieces of the dot matrix display device fl"ffi according to the present invention, and FIG. 4 is a block diagram of an embodiment of the dot matrix display device according to the present invention, and FIG. 4 is a circuit diagram of the embodiment of the dot matrix display device according to the present invention. 1 - Small pixel piece 2 - Static memory circuit B... Pixel selection control signal 4 - Data signal 5... Drive control circuit 6... Memory circuit Cheetah drive signal
8. Controlled signal 9. Liquid crystal layer 10... - Upper panel input signal 11... Large pixel piece 1'5... External signal 14...
-Decode circuit 15... -External signal 16...Data latch circuit 17...External signal 18.19...Clock signal 20...Common driver 21.22, 2, 24.Small pixel piece electrode 25. 26,
27.28...Data signal 29...Pixel selection control signal 60, Lo1...Clocked in park 32...Inharter 33, common signal 34, Lo5--Clocked inverter Lo6...Contact or more Applicant Suwa Seikosha Co., Ltd. Agent Patent Attorney
(B''Escoration 1 Figure 0 Fuzl 1917 Dete 1 ・1 (Table of A′1; 1・1i What:: 581 Shochu 1′ (Gan No. 679941
32 Dot matrix display device 3, the master of invention Representative Director Tsuneya Nakamura 4 Acting Director Tokyo (2-1 Jingumae, Tani-ku, Tokyo) No. 6, No. 8, No. 5
111'111-Instruction 111・y (Summon r:1s8i17/26[] Procedure Correction-!S-(Method) % expression% r(A'lf: Assertion 7 in Bonn display, (A") is The expression -1 in the i-ga display is corrected to r(B)+-goboji display, and (C) is corrected to j in the i-ga display.''!J[]4' 5 lines 1 from the bottom of page 3] [For example,
In the case of a positive display as in (A'), the word V 1 should be corrected to ``1'' for a positive display as in (B). 6 Specification II, 6th line from the bottom of page 3, `` In the case of negative display of (A"), vc hi, , l do.
``In the case of negative display of (C)''', the first line should be changed to ``In the case of negative display of (C)''. 1 (Dlfd,"). 5. Specification, page 4, 5th row from the bottom to II, 4th line "(
B) is a positive display, and (FI') is a negative display. " is corrected to "(E) is a positive display, and (F) is a negative display." 6 Ming, Book of ill, 7th line from the bottom of 9th line to 5th line of the same line “1st
Figures (A), (A'), (A' is a diagram showing an example of display by a conventional dot matrix display device, Figure 1 (B),
(13'), (B' is based on the present invention). Figure CD)
, (m), (F) (l-1: Corrected to "according to the present invention")
(, B”) is corrected, and the 11th evil (A) (B) (
C Small (D) (E) Attach as (F). (A) (B, 1) (E) (F) Figure

Claims (1)

[Claims] (1) In a matrix-like display device having a plurality of X lines and a plurality of Y lines intersecting the X lines, a pixel unit arranged at each intersection of the matrix , consisting of a relatively large pixel piece that is visually rectangular, which pixel piece is composed of a group of four relatively small pixel pieces that are visually triangular and divided by two diagonals of the rectangle. (2) The dot matrix display device according to claim 1, wherein the display device uses a liquid crystal display. (3) The dot matrix display device according to claim 1, wherein the display device uses an electrochromic display body (4) The above.
2. The dot matrix display device according to claim 1, wherein the display device uses a plasma display. (5) A node matrix display device according to claim 1, wherein the display device uses a fluorescent display tube. (6) The dot matrix display device according to claim 1, characterized in that the display device uses an electroluminescent display material.¥t0(7)
2. The tomatrix display device according to claim 1, wherein said display device uses a light emitting diode display.