JPS58172684A - 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 display device equipped with a liquid crystal display.

Conventional 5-digit matrix display of liquid crystal display pupils uses dynamic driving in which each digit is selected sequentially, but in this driving method, the operating margin α (effective value of voltage applied to display pixels/non-display pixels) is used. Since the effective value of the applied voltage (applied voltage effective value) is as low as 1.9, it was not possible to drive a guest-host type liquid crystal by 3 digits.Incidentally, in the guest-host type, the operating margin must be at least 20. Even with the twisted nematic liquid crystal that is used, the operating temperature range is narrow with the above operating margin.
There are problems such as not being able to obtain sufficient contrast and slow response. Therefore, the present invention provides a display device that can increase the operating margin by combining electrode wiring, and makes it possible to drive a guest-host type liquid crystal in six digits. KL provides high contrast and fast response over a wide temperature range even in nematic liquid crystals.

This is a friend - the following is the fruit of the present invention 111! iml will be explained based on the drawings. In Figure 1, seven pixels a-g, K constitute a number pattern, and the numbers 0 to 9 are displayed by selectively making each pixel responsive or non-responsive as shown in Figure 2. .

So, if we focus on pixels S, C, and CLK, these three th
There is no display mode in which water becomes non-responsive at the same time. In view of this point, the segment voltages Sb, Be, 84 of pixels C, A are set as shown in FIG.

Electrically connect ・For the remaining pixels, pixel a8g
Connect the segments of the segment electric day a, 8g comrades [1, - cumulative e,
Connect segment electrode Be of f, 8f, connect segment electrode 8P of 0 colon display and segment electrode 8e of alarm display, and connect segment electrode Be of 10 o'clock and F
Connect the segment electrodes Sm indicated by Mfi ◎ And to each other! #Continuous tAlso, three common electrodes 10 are connected so that each segment electrode faces a different common ms.
0M1, C0M2.00M3 are provided.0 Furthermore, the segment electrode and the common 11 space are filled with GH. Since the electrodes are wired together as described above, the common electrode and By applying voltage to the segment electrodes, all numbers can be displayed and the operating margin can be increased. In other words, the common electrode C0M1r has a common voltage drive circuit VD 'F.
1 to voltage 0h (0°V, 27,5V, 4V, 3V, 2
V, V), common voltage gcou2KId voltage Cs (0,
3V, 2V.

V, 4V, V, 2V, 5V), common voltage qILoOM3
has a voltage of 0 * (3V, V, 4V, V
,V,3V.

0.3V) is constantly supplied to the segment electrodes, and a voltage of 5i (0°0.3
V, 4V, 4V, 4V, V, O), voltage 8 m (0,
4V, 5V, 0, 4V, O, V,
4 V) Voltage Sm (3V, 0,3V, O,V, 4V
,V.

4v), electric FE8a (0, 2V, V, 2
V, 4V.

2V, 3V, 2V), voltage 86 (5V, 4V.

3V, 4V, V, O, V, O) selectively supplied.

With this, it is possible to make any NK response or non-response except when three pixels become non-responsive at the same time.
Since the two th elements select the segments that do not become non-responsive at the same time and connect their segment electrodes, all the displays can be performed.And looking at the operating margin, the non-responsive +1! +1
Raw voltage effective value K ~ r core 8. 1 of 1 ml of responses! Tami effect candy f ``i Ami Arike JT [1/8, so α
Medium 2゜5, much thicker than the conventional α medium 1゜9 (-
I can do a lot of things.

K indicating each number 0 to 9 is the voltage S1 to S in Fig. 4,
should be supplied to the segment electrodes as shown in FIG.
Segment 1 of pixel b*CId! Electron 5Ess is used for the pole,
A voltage E1m is applied to the segment electrodes of pixels a and g, and a voltage E1m is applied to the segment electrodes of pixels a and g.
, e is supplied with a voltage S or 83. On the other hand, the common electrode 00M1 of pixels S, a, f, pixels c, g,
Common electrode coM of e: and iih + common electrode 0 of element d
0M3 [each voltage 0. ,01.

C1 is supplied. c
.

d, a, f, e respond, Iil! When the element g becomes unresponsive, the number 0 is displayed. Other numbers, colons, alarms, and PM light display are displayed by selectively supplying electric power EEsi~S. Note that the above implementation or I Now, we connected the segment electrodes of pixels ibmc and a, but since pixels a, b, c and th elements, g, and e will not be hidden at the same time, we will connect the segment electrodes of these pixels. As is clear from the fifth example, there is no display mode in which two of the six pixels are non-responsive and the remaining one is responsive.

However, due to the voltage Bar in FIG. 4, pixels S and C do not respond, and In! ! It is possible to use cumulative d as a response.
Then, pixels a, f, e, and d respond to the alphabet 0, and pixels a, f * f3 e d * g respond to the alphabet 0) Elf indicates [7, It is possible to display an error ◎ However, if you want to display only numbers, the 6th and 1st
0 or common type iaoM1 which can make the operating margin larger by supplying a voltage like
ff voltage (0, V, 5 V, 4 V, 3 V, V), common type %00M2 voltage (0,5 V, V, 4 V, V, 5”
Jl, and the voltage (3V, V, V, V
, 3V.

Always supply 3V1 and turn on the segment voltage 1iff'#lL
Voltage day @ (0, 0, 4V, 4V, 4V, O)% voltage E?
t (0,4V, 0,4V,0.4V1
, voltage S@ f3V, O, O, V, 4V, 4V), voltage B@ (0,2V, 2V, 4V, 2V, 2V) and 1[FEBio(AV, 4'V, 4V, V, 0. 0)
(i') Selectively supply one of them. In this case, the effective voltage of the non-responsive pixel is J7A7,
The effective voltage value of the responsive pixel is fri7'-'i or ~β
Since it is 56/6-, the operating margin Vta can be very large as 50.The display pattern is 0 as shown in 9 above, which is not in the numerical or alphabetical display. According to the above, since the segment electrodes of three pixels that do not display at the same time are made IH, a very high operating margin can be obtained with %3-digit driving, high contrast display can be performed over a wide temperature range, and the response speed is Fast - In addition, it is now possible to drive guest-host liquid crystals in three digits, which was previously impossible, and provide high contrast.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of a display pattern, Fig. 2 is an explanatory diagram showing the states of pixels in each display mode of Fig. 1, and Fig. 3 is an explanatory diagram showing the '11L pole and FIG. 4 is a diagram showing an example of the voltage supplied to the electrode, and FIG. 5 is a diagram showing the voltage supplied to the electrode and the pixel in each display mode of the 1ili element in FIG. FIG. 6 is an explanatory diagram showing another example of the voltage supplied to the electrode. a-g-Fh*8 a-S-8g...Segment electrode 8p, El/,
Bm...Segment electrode C0M1.00M2.00M
3...Common electrical contact DR1...Common electrical contact drive homologous DR,...Segment electrodiagnostic drive circuit Eso soil patent applicant Seiko Co., Ltd. 1 figure 2 O1 8x; Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] A plurality of pixels are formed by a plurality of segment electrodes, an electro-optical display material, and five common electrodes, and the segment electrodes of three pixels that do not become non-responsive at the same time among each pixel are electrically connected to each other. Along with the connectors, the connected segment electrodes are respectively opposed to different common electrodes, and each common electrode KFi supplies a different electric signal,
A display device and a display device in which the segment electrodes are equipped with driving tautology that selectively supplies a plurality of electrical signals different from the above electrical signals depending on the displayed content.