JPH01170988A - Display device - Google Patents

Abstract

PURPOSE:To easily invert the right and left parts of an image by using a two- way signal shift register in a driving circuit for the display device which is scanned on a linear sequential basis, switching the input direction of a signal to left or right and also switching the signal moving direction in the signal shift register. CONSTITUTION:In the driving circuit 9 which makes a line sequential scan, switches 10 and 11 are operated associatively; when the switch 10 is connected to a line 13, the switch 11 is open to input a left right signal to the two-way shift register 2 from a line 12, and the two-way shift register 2 shifts the input signal from left to right. When the switch 10 is connected to a line 14, the switch 12 is closed to input a right left signal to the two-way shift register 2 from the line 12, and the two-way shift register 2 shifts the input signal from right to left. Consequently, the right and left parts of the image are easily inverted only by switching the switches.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a display device for a television receiver or a video monitor.

Conventional technology In recent years, there has been a demand for the left and right images of display devices to be reversed, and in display devices using conventional cathode ray tubes (CRTs), the waveform of the output current of the horizontal circuit cannot be reversed. The left and right sides of the displayed image were reversed.

Problems to be Solved by the Invention However, in the above-mentioned system, the CRT's horizontal circuit uses a large amount of power, so it requires duplicate parts dedicated to it, and circuits such as switching devices are required. This has the problems of complication and increased cost.

In view of the above-mentioned problems, the present invention aims to regularly use a display device that has a simple and inexpensive configuration and can reverse the left and right images.

Means for Solving the Problems In order to solve the above problems, the present invention provides a drive circuit to which vertical electrodes (for signals) for performing line sequential scanning are connected in a display device that scans in a line sequential manner. The signal shift register inside is bidirectional, with a switch for switching the input direction of the signal to the left or right, and a switch for switching the direction of movement of the signal inside the signal shift register.

Function The present invention can easily reverse the left and right sides of an image displayed on a display device using the above-described simple configuration.

Example An embodiment of the present invention will be described below with reference to the drawings.

Line sequential scanning will now be explained.

First, in Fig. 2, we will explain the drive circuit that performs line sequential operation.The signal for one scanning period is input as an input signal from the input signal line 1 to the left or right side of the bidirectional shift register 2 (not both at the same time). When data for one scanning period has been input, the latch circuit 3 latches all the data, and then a voltage is applied to the vertical electrodes 7 of the display section 6 by the decoder waveform adjustment circuit 4 and driver 5. , when the horizontal electrodes 8 of the display unit 6 are scanned, an image is displayed.

At this time, assuming that the signal shown in FIG. 3a is an input signal, if it is input from the right side of the bidirectional shift register 2, the image on the display section 6 will become as shown in FIG. However, if the input signal a is input from the left side of the bidirectional shift register 2, the image on the display section 6 becomes as shown in FIG. 3C, and the left and right sides are reversed.

FIG. 1 shows an embodiment of the present invention. First, switch 10
and switch 11 are interlocked, and when switch 10 is connected to line 13, switch 11 is in an open state, and a signal is sent from line 12 indicating that the signal direction of bidirectional shift register 2 is from left to right. is input to the bidirectional shift register 2, and the bidirectional shift register 2 shifts the input signal from left to right. Further, when the switch 10 is connected to the line 14, the switch 12 is closed, and a signal indicating that the signal direction is from right to left is input from the line 12 to the bidirectional shift register 2, and the bidirectional shift register 2 , shifts the input signal from right to left. Switch 1 above
You can easily flip the image left and right by just switching 0.11.

Effects of the Invention As described above, according to the present invention, in a display device using a bidirectional shift register, when it is desired to invert an image horizontally, the image can be inverted horizontally and horizontally, and the cost increase is kept to a minimum. Yes, the cost increase is less than that using CRT.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a display device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a line-sequential scanning drive circuit and the connection state with the electrode portion of the display device, and FIGS. 3a, b,
c is a diagram showing the relationship between signals and images in the line sequential scanning method. 1...Input signal line, 2...Bidirectional shift register, 3...Latch, 4...
・Decoder/waveform adjustment circuit, 5...driver, 6...display section, 7...vertical electrode (
signal electrode), 8...lateral electrode (scanning electrode),
9... Drive circuit, 10.11... Switch, 12... Bidirectional shift register left/right direction input signal line, 13.14... Signal line. Name of agent: Patent attorney Toshio Nakao and 1 other person 1--Figure 2

Claims (1)

[Claims] A shift register for signals for line sequential scanning of the drive circuit, which is provided with a vertical electrode and a horizontal electrode separated from the vertical electrode, is bidirectional, and is connected to the vertical electrode. 1. A display device comprising: a first switch for switching whether input is from the left side or from the left side; and a second switch for switching the moving direction of a signal within the shift register.