JPH10301540A - Liquid crystal television monitor provided with scan inverting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a liquid crystal television monitor provided with a function to change scanning separately in up-and-down and left-and-right directions and to cope with both of visual field angles of up and down directions with one kind of a liquid crystal panel by making the scanning direction of an inputted video signal to be inverted from upward to downward or in reverse and from left ward to right ward or in reverse while changing over scanning directions of the video signal. SOLUTION: Horizontal scanning directions of the video signal are changed by a horizontal scanning inverting switch 5 switching over the direction in which the transfer pulses to be applied to the source driver 2 of a liquid crystal panel 1 are transferred from the left of the screen of the panel to that from the right or in reverse. Similarly, vertical scanning directions are changed by a vertical scanning inverting switch 6 switching over the direction in which the transfer pulses to be applied to the gate driver 2 of a liquid crystal panel 1 are transferred from the upper side of the screen of the panel to that from the lower side of the screem or in reverse. Thus, inversion changeovers of scanning directions are made possible easily. Moreover, the monitor can cope with both of visual field angles of the up and down directions with kind of the liquid crystal panel 1 by constituting the monitor so as to be able to rotate 180 degrees with a tilt mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal television monitor having a scanning inversion function capable of switching between vertical and horizontal scanning directions.

[0002]

2. Description of the Related Art As a conventional technique, for example, a television monitor having a deflection inversion function using a cathode ray tube has been used as a television monitor used in an X-ray apparatus. The direction of current application is switched between the normal direction of the deflection yoke and the opposite direction. With this function, the problem that the image direction differs depending on the imaging direction of the X-ray apparatus is corrected on the television monitor. Further, the liquid crystal has a disadvantage that the viewing angle is narrow as a problem peculiar to the liquid crystal. In particular, the viewing angle in the vertical direction at 6 o'clock is currently only 10 degrees at the upper side / 30 degrees at the lower side. As described above, since the viewing angle is different between the upper and lower sides, the liquid crystal maker has two specifications of the 6 o'clock direction specification and the 12:00 direction specification.
They sell different types.

[0003]

In the above-mentioned prior art liquid crystal television monitor, since there is no internal inversion function,
It is necessary to perform an image inversion process on an input video signal and switch the scanning direction before inputting it to a television monitor. In addition, since the liquid crystal has a different viewing angle in the vertical direction, when using the liquid crystal, it is necessary to specify a 6 o'clock direction specification and a 12 o'clock direction specification depending on the application, and to purchase another specification. In order to eliminate the above-mentioned drawbacks, the present invention has a built-in scanning inversion function in a television monitor, and can switch the scanning direction individually for up, down, left, and right, and a single type of liquid crystal panel can handle both vertical and vertical viewing angles. It is an object of the present invention to provide a liquid crystal television monitor capable of performing the above.

[0004]

In order to achieve the above-mentioned object, the present invention is configured, for example, as shown in FIG. FIG. 1 is a block diagram showing the overall configuration of the present invention. In FIG. 1, in order to correctly display an input video signal on the liquid crystal panel 1, a horizontal scanning inversion switch 5 for switching whether a transfer pulse applied to the source driver 2 of the liquid crystal panel 1 is transferred from the left side of the screen or from the right side. In the same manner, the vertical scanning direction is switched by a vertical scanning inversion switch 6 for switching whether the transfer pulse to be applied to the gate driver 3 in the vertical direction is transferred from the upper side or the lower side of the screen. Switch. In addition, a tilt mechanism is provided, and the liquid crystal television monitor can be rotated by 180 degrees. As a result of this configuration, the horizontal scanning inversion switch 5 and the vertical scanning inversion switch 6 can easily switch the scanning direction inversion by switching the transfer pulse to the source or gate driver from up, down, left and right. Become. Also,
Since the liquid crystal television monitor 8 can be rotated by 180 degrees by the tilt mechanism, one type of liquid crystal panel can cope with both vertical and vertical viewing angles.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the liquid crystal television monitor with a scanning inversion function of the present invention is used as a television monitor for image observation of an X-ray apparatus will be described below with reference to FIG. In FIG. 2, when the human body 11 is photographed from both the upper and lower directions by the cameras 9 and 10, the input video signal is inverted on the liquid crystal television monitor 8 because the horizontal and vertical scanning directions are inverted by the cameras 9 and 10. The signal is decoded into a 1H inverted RGB signal by the liquid crystal decoder 7, and the source driver 2 is decoded by the timing controller 4.
And a transfer pulse for driving the gate driver 3 is created.
In the case of the main transfer pulse, the horizontal scanning inversion switch 5 switches between the left and right sides of the source driver 2 for the horizontal scanning, and the vertical scanning inversion switch 6 selects the upper or lower side of the gate driver 3 for the vertical scanning. By switching, the scanning direction is switched, and the scanning direction can be corrected to a fixed direction on the liquid crystal television monitor according to the scanning direction of the input signal.

Further, by attaching a tilt and pan mechanism as shown in FIG. 3 to the liquid crystal television monitor having the scanning direction switching function, the tilt and pan mechanisms rotate the liquid crystal television monitor by 180 degrees, respectively.
By reversing both the horizontal and vertical scanning directions, the liquid crystal of the 6 o'clock direction can be used as the liquid crystal of the 12 o'clock direction, and one type of liquid crystal panel can cope with both vertical and vertical viewing angles.

[0007]

As described above, according to the present invention, it is possible to switch the screen in the direction desired to be observed on the liquid crystal television monitor even when a video signal whose scanning in the horizontal and vertical directions is inverted is input. Becomes In addition, one type of liquid crystal panel can handle both the vertical viewing angle and the viewing angle direction can be selected according to the installation location of the liquid crystal television monitor and the image observation state.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of the present invention.

FIG. 2 is a diagram showing an embodiment in which the liquid crystal television monitor of the present invention is combined as a television monitor for image observation of an X-ray apparatus.

FIG. 3 is a view showing an example of a tilt pan mechanism of the present invention.

[Description of Signs] 1: Liquid crystal panel, 2: Source driver, 3: Gate driver, 4: Timing controller, 5: Horizontal scanning inversion switch,
6: vertical scanning inversion switch, 7: decoder circuit for liquid crystal, 8: liquid crystal television monitor, 9,
10: Camera, 11: Human body.

Claims (2)

[Claims] 1. A liquid crystal television monitor with a scanning inversion function, comprising: a scanning direction switching means for switching a scanning direction of an input video signal, wherein the scanning direction can be inverted vertically or horizontally. John Monitor. 2. A liquid crystal television monitor with a scanning inversion function according to claim 1, further comprising a tilt mechanism capable of rotating the liquid crystal screen by 180 degrees so that one type of liquid crystal can cope with any of the vertical viewing angles. A liquid crystal television monitor with a scanning inversion function, characterized in that: