KR100215975B1 - Display panel angle control equipment and control system of slim display equipment - Google Patents

Abstract

The present invention relates to a display panel angle adjusting device and a control method thereof of the thin film type display device. The present invention relates to a display panel angle adjusting device and a control method thereof.

The display panel angle adjusting device is applied to a thin film type display device used as a display device of a computer device or a display device of an image medium, and its main components are the vertical drive means 250, the lower limit switch 220, and the upper and lower limit switches. Switch 220, left and right driving means 150, left limit switch 125, right limit switch 130, up and down control key 310, left and right control key 320, A / D converter 340; In addition, by including the microcomputer 350, since the angle of the display panel can be adjusted as desired by the user in the thin film display device, an effect of improving the display contrast of the display device and obtaining excellent screen gradation is achieved. .

Description

Display panel angle adjusting device and control method of thin film display device

1 is a perspective view showing a schematic view of a notebook, wall-mounted or self-supporting thin film display device to which the present invention is applied;

FIG. 2 is a configuration diagram showing the configuration of main parts of the display panel angle adjusting device of the thin film display device constructed in accordance with the present invention. FIG. 2 (A) is a front view of the thin film display device, and FIG. 2 (B) is a thin film display device. 2 (C) is a cross-sectional view taken along the line A-A 'of FIG.

3 is a circuit diagram showing a schematic circuit configuration of a control circuit and a microcomputer according to the present invention;

4 is a flowchart illustrating an operation flow of a microcomputer to which a control method according to the present invention is applied.

Explanation of symbols for main parts of the drawings

100: thin film display device (main frame) 110: display channel

111: vertical axis of rotation 121: left and right axis of rotation

112: pinion 113: replacement car

130: right limit switch 150: left and right drive means

250: vertical drive means 151, 251: rotation axis

220: downward limit switch 230: upward limit switch

310: Up and down control keys 320: Left and right control keys

340: A / D converter 350: microcomputer

The present invention relates to a display panel angle adjusting device and a control method thereof of the thin film type display device. It relates to a display panel angle control device and a control method thereof.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display device which is used as a display device as a terminal of a computer device and also as a display device of an image device such as a television, a video recording player, or the like.

Conventionally, a cathode ray tube (CRT) display device has been widely used as the display device. However, due to its volume, power consumption, and weight, such a display device has a thin film type. The use of display devices is gradually increasing.

As a thin film type display device to which the present invention is applied, a schematic view of a notebook type 100, a wall type 102 or a self-supporting type 101 thin film display device is shown in FIG.

As such a thin film type display device, a liquid crystal display (LCD) or a plasma display panel (PDP) or the like is used.

The basic principle of the liquid crystal display device is to position the liquid crystal between two thin glass substrates on which the transparent conductive film is attached, and apply light to the liquid crystal film according to the change of the electric field by applying an electric field through an electrode formed in a matrix form on the transparent conductive film. By using the phenomenon of scattering, the liquid crystal film is irradiated with reflected light or transmitted light and displayed to the user.

In such a liquid crystal display, the difference in brightness between one pixel on and off is called contrast or contrast, and the contrast value is defined as the difference between two brightness values divided by the larger of the two values. The closer the contrast value is to 1, the better the display. Often, contrast ratios are used to characterize the liquid crystal display. This is defined as the larger of the two brightness values divided by the smaller one. The higher the contrast ratio, the better the display device.

In the liquid crystal display, the contrast ratio varies depending on the angle at which the display panel is viewed. Therefore, when the panel is viewed from the vertical front of the display panel of the liquid crystal display device and when the panel is viewed at an oblique side, the contrast is different, and thus the desired performance of the liquid crystal display device cannot be exhibited evenly. This exists.

In a liquid crystal display device using a thin film transistor (TFT) of the state of the art, the viewing angle having proper display performance is much wider than that of a conventional liquid crystal display device, but the problem still exists.

In addition, a cathode ray tube display device used in a conventional computer monitor includes a monitor portion in which a cathode ray tube and a circuit board are embedded, and a stand portion for supporting the monitor portion, and the connection portion between the stand portion and the monitor portion can be operated. The display screen of the monitor can be adjusted up, down, left and right so as to maintain an optimum angle according to the user's physical condition. However, the object of the present invention also has a problem in that the structure of the stand portion is different from the cathode ray tube display device in the thin film display device, the conventional angle adjustment method using the stand portion can not be applied as it is.

On the other hand, when the display device is stored in a desk having a transparent glass plate or the like, or when the display device is located in a high place in the case of a wall-mounted television, or when access to the display panel of the display device is difficult, the display device is manually operated. Since the angle of is not adjustable, the apparatus of the present invention is required.

[Technical problem to be achieved]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and the user's intention is to set the angle of the display panel of the thin-film display device in a desired time so that the user of the thin-film monitor can use the display quality of the display device in the best condition. An object of the present invention is to provide a display panel angle adjusting device and a control method of the thin film type display device.

[Configuration and Function of Invention]

In order to accomplish the above object, the present invention provides a thin film type display device having a display panel used as a display device of a computer device or a display device of an image medium, the user command to rotate the display panel in the vertical axis Up and down control keys as inputs; Left and right adjustment keys as an input of a control command for the user to rotate the display panel to the left and right axes; An upper limit switch for sensing a limit position of the rotation of the display panel when the display panel is rotated forward by the vertical driving means; A lower limit switch for sensing a limit position of the rotation when the display panel rotates in the reverse direction by the vertical driving means; A leftward limit switch for having a limit position of the rotation when the display panel rotates in the reverse direction by the left and right driving means; A right limit switch for sensing a limit position of the rotation when the display panel is rotated forward by the left and right driving means; An A / D converter which processes an input of a synchronization signal as a video signal input of the display device; Outputs a control signal for adjusting the display panel up, down, left, and right according to the input of the up, down, left and right control keys, and then, when the limit position of rotation is sensed through the up, down, left, and right limit switches, While outputting a control signal to stop the adjustment to the control panel, if there is no input of the synchronization signal through the A / D converter, the display panel is rotated in the reverse direction by adjusting the direction up, down, left, right A microcomputer for outputting a control signal for repositioning; Up and down driving means for rotating the display panel in a forward or reverse direction to adjust the up and down angle of the display panel according to the control signal of the microcomputer; And a left and right driving means for rotating the display panel in a forward or reverse direction to adjust the left and right angles of the display panel according to the control signal of the microcomputer. .

In addition, the present invention as a display panel angle control method of the display device for achieving the above object, has a vertical control key for adjusting the upper and lower angle of the display panel angle of the thin film display device and the left and right control keys for adjusting the left and right of the display panel angle A display panel angle control method for a display panel angle adjusting device, comprising: a key input determination step (ST11) for judging whether a key is pressed and performing step ST12 while the key is pressed; A forward driving reverse drive selection step (ST12) for determining whether the down and left limit switches are on or whether the up and right limit switches and the down and left limit switches are turned off; A forward drive control step (ST13) of driving the vertical, horizontal and horizontal drive means in the forward direction if the determination result in the forward drive reverse drive selection step (ST12) is YES; It is determined whether the upper and right limit switches are on. If NO, the forward driving control step ST13 is continued, and if yes, the forward limit switch determination step ST14 is performed to perform the driving means stop step ST18. ); It is determined whether the input level of the vertical synchronous signal electrically input to the display device is low and the input level of the horizontal synchronous signal is low, and if yes, the reverse driving control step (ST16) is performed. If no, the key input is performed. A synchronization signal input determination step ST15 for performing the determination step ST11; A reverse drive control step (ST16) for driving the up, down, left and right drive means in the reverse direction when the determination result of the forward drive reverse drive selection step (ST12) is NO; It is determined whether the lower and left limit switches are on. If NO, the reverse driving control step ST16 is continued, and if yes, the reverse limit switch determination step ST17 is performed to perform the driving means stop step ST18. ); And a driving means stop step (ST18) for stopping driving of the up, down, left and right driving means when the determination result of the forward limit switch determination step ST14 is YES or the determination result of the reverse limit switch determination step ST17 is YES. Provided is a display panel angle control method of a thin film type display device.

According to the above-described configuration of the present invention, a control action for the vertical and horizontal driving means for adjusting the vertical and horizontal angles of the display panel of the thin film display device is performed using the vertical and horizontal control keys and the vertical and horizontal control keys. The control key is installed in a device other than the display device to perform a remote control operation.

EXAMPLE

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

2 is a block diagram showing the configuration of main parts of a display panel angle adjusting device of a thin film display device constructed in accordance with the present invention.

FIG. 2 is a configuration diagram showing a main part of a display panel angle adjusting device of a thin film display device constructed in accordance with the present invention, and FIG. 2 (A) is a front view of the thin film display device.

In the thin film display device of the present invention, the display panel 110 on which the display screen is positioned, the vertical rotation axis 111 when the display panel rotates in the vertical direction, and the left and right sides when the display panel 110 is rotated in the horizontal direction. An intermediate frame 120 having a rotating shaft 121, and a main frame 100 supporting the left and right rotating shafts 121 of the intermediate frame 120.

Main components for driving the display panel include a vertical driving means 250, a lower limit switch 220, an upper limit switch 230, a left and right driving means 150, a right limit switch 130, a left direction Limit switch 125, up and down control keys 310, left and right control keys 320, and the microcomputer (350).

The left and right driving means 150 is mounted and fixed to the main frame 100, and the up and down driving means 250 is mounted and fixed to the intermediate frame 120.

As the vertical and horizontal driving means 250 and 150, a servo motor capable of forward rotation or reverse rotation according to an electrical control signal is preferably used.

FIG. 2 (B) is a detailed view showing the configuration of the up, down, left and right driving means of the thin film display device, and FIG. 2 (C) is a cross-sectional view taken along the line A-A 'of FIG.

A detailed operation of changing the display angle of the display panel by the driving of the vertical and horizontal driving means will be described with reference to FIGS. 2B and 2C.

Reference numeral 110 is a display panel of a thin film type display device. The display panel is a display unit which is provided with an LCD element or a PDP element depending on the device and displays the same to the user according to the change of the input image signal. In the upper direction of the display panel, a vertical rotation shaft 111 that is a center for rotating the angle of the display panel of the display panel 110 in the vertical direction is fixed.

Reference numeral 120 is an intermediate frame in which the vertical driving means 250 is fixed and supported. Two support means (not shown) of the vertical axis of rotation 111 to rotate the vertical display angle of the display panel 110 are installed at the upper left and right sides of the intermediate frame 120. When the up and down rotation shaft 111 of the panel 110 is supported and the up and down driving means 250 is driven through the up and down driving circuit, the pinion 112 connected to the rotation shaft 251 of the up and down driving means 250 is rotated so that the rack in The replacement vehicle 113 is moved. Since the replacement wheel 113 is fixed to the lower end of the display panel, as the pinion 112 rotates, the display panel 110 rotates about the vertical rotation shaft 111.

Here, the upper and lower limit switches 230 and 220 are fixed to the side of the substitute 113. Therefore, when the counterpart 113 is moved, the upward and downward limit switches 230 and 220 contact the protruding jaw 401 of the intermediate frame 120, so that the upward and downward directions are set at a predetermined angle. The contacts of the directional limit switches 230 and 220 may be connected to generate an electrical signal.

Since the angle conversion method in the vertical direction of the display panel 110 and the angle conversion method in the left and right directions of the display panel 110 as described above are the same, detailed description thereof will be omitted. However, the left and right driving means 150 is fixed to the main frame 100 of the thin film type display device. In addition, the middle frame 120 has a left and right rotating shaft 121 serving as a center for rotating the middle frame 120 viewed left and right on the upper and lower portions of the left and right.

As described above, when the left and right driving means 150 rotates through the left and right driving circuits, the middle frame 120 is connected to the rotating shaft 151 of the left and right driving means 150. It rotates about the left and right rotating shafts 121 with respect to the main frame 100.

The upper and right limit switches 230 and 130 and the lower and left limit switches 220 and 125 used in the present invention are the maximum when the display panel 110 of the present display device rotates along its rotation axis. It is installed to detect the rotation position.

Here, the forward limit switches (in detail, the upper and right limit switches 230 and 130) are installed to limit their rotation at the maximum position when the display panel 110 rotates in the forward direction. In addition, the reverse limit switch (in detail, the lower and left limit switches 220 and 125 are installed at the maximum position when the display panel 110 rotates in the opposite direction to the opposite side, so that the upper and lower sides of the display panel 110 can be installed). And a maximum value sensing means for blocking the rotational driving of the left and right driving means 250 and 150.

The upper and lower limit switches 230 and 220 are respectively installed on the upper and lower rotation shafts, and the left and right limit switches 125 and 130 are respectively installed on the left and right rotation shafts so that all four limit switches are used. do.

3 is a circuit configuration diagram showing a wiring configuration for controlling between a thin film display device and its associated circuits to which the method of the present invention is applied.

When the thin film display device of the present invention is used as a display device of a computer, the microcomputer 350, which is the core of the control function, can be configured using a central processing unit or the like in the computer. In addition, by adding the upper and lower keys and the left and right keys of the present invention in addition to the various keys as input means such as the existing keyboard of the computer, it is possible to remote control from a device other than the display panel. It may be formed using to have a second function.

Here, it is preferable to use a pushbutton key switch in which the contact points are connected only when the keys are pressed.

On the other hand, it may be configured by using a wireless keyboard device using an infrared method or by placing the control keys of the present invention in a transmitter having a remote control function of a conventional wireless infrared method.

The A / D converter 340 used in the present invention has a function of receiving a synchronization signal from a video device or a computer main body and detecting a signal level thereof.

The A / D converter 340 checks the frequency of the horizontal synchronization signal H. SYNC as the synchronization signal and the frequency of the vertical synchronization signal V. SYNC. In the case of H. SYNC, for example, it is checked whether the frequency is 10 KHz or less, and in the case of V. SYNC, it is checked whether the frequency is 40 Hz or less. The value of the frequency is the specified frequency as defined in the VESA regulation. When a synchronization signal of this frequency or higher is input, it can be determined that there is a normal signal input.

Therefore, when the input level of the synchronization signal is low, the display device is the same as the state where the display device is not used. Therefore, when the display device is not used, the angle of the display panel of the display device is retracted to a predetermined position. Let's do it.

4 is an operation flowchart showing the flow of operation to which the method of the present invention is applied.

In step ST10, the power of the computer device or the image display device is turned on to prepare for the operation.

The microcomputer 350 used in the present invention checks whether there is an input through the vertical and horizontal control keys 310 and 320 of the present invention at regular intervals.

The up, down, left and right control keys 310 and 320 are provided one by one with respect to one axis of the up, down, left and right rotation axes of the display panel 110. Therefore, according to the present invention, one channel for performing the up and down rotation operation and another channel for performing the left and right rotation operation are required. Since the operation of the up and down channels is the same as that of the left and right channels, the following description will be made based on one channel of the up and down channels.

The key input determination step ST11 determines whether the up and down control keys 310 of the key input means (for example, the up and down and left and right control keys 310 and 320) of the display panel 110 of the display device of the present invention are pressed. To perform the steps ST12 and subsequent only while the key is pressed, and to perform step ST15 while the key is not pressed.

In step ST12, the reverse limit switch (e.g., the lower limit switch 220 of the lower and left limit switches 220 and 125) is turned on or the forward limit switch (e.g., the upper and right limit switches). A forward driving reverse drive selection step of determining whether the upper limit switch 230 and the reverse limit switch (for example, the lower limit switch 220) of the switches 230 and 130 are turned off.

When the reverse limit switch (for example, the lower limit switch 220) is turned on in the forward driving reverse drive selection step (ST12), it means that the display panel 110 has the maximum angle in the reverse direction. . In addition, the fact that both forward and reverse limit switches (for example, the upper and lower limit switches 9230 and 220) are turned off means that the display panel 110 is in an intermediate position instead of being located at both ends. do.

Therefore, if the determination result in the forward driving reverse drive selection step ST12 is YES, the forward direction for driving the driving means (for example, the up and down driving means 250 among the up and down and left and right driving means 250 and 150) in the forward direction The drive control step ST13 is performed.

On the contrary, when the determination result in the forward driving reverse drive selection step ST12 is no, it means that the display panel 110 is positioned as maximum in the forward direction. At this time, a reverse driving control step ST16 for driving the driving means (for example, the vertical driving means 250) in the reverse direction is performed.

While the driving means (for example, the upper and lower driving means 250) rotates in the forward direction, in the forward limit switch determination step ST14, the forward limit switch (for example, the upper limit switch 230) is turned on. If it is determined that NO, the forward drive control step (ST13) is continued, and if yes, the driving means stop step (ST18).

In addition, while the driving means (for example, the up and down driving means 250) rotates in the reverse direction, in the reverse limit switch determination step ST17, the reverse limit switch (for example, the lower limit switch 220) is If it is determined to be ON, if NO, the reverse driving control step ST16 is continued, and if YES, the driving means stop step ST18 is performed.

Finally, in the driving means stop step ST18, when the determination result of the forward limit switch determination step ST14 is YES or when the determination result of the reverse limit switch determination step ST17 is YES, the driving means (e.g., the vertical drive) The drive of the means 250 is stopped.

In step ST15, a synchronization signal input determination step is performed to determine whether the input level of the vertical synchronization signal electrically input to the display device is low and whether the input level of the horizontal synchronization signal is low.

In step ST15, there is no retracting when the angle of the display panel returns to its original position when there is no key input and when no synchronization signal is input, that is, when the power supply of the computer device or video display device is turned off and there is no input of the video signal. retract) signal generation step. If the determination result of this step is YES, the reverse drive control step ST16 is performed. If NO, the key input determination step ST11 is performed.

Therefore, when there is no key input and no synchronization signal, that is, when the power supply of the computer device or the video display device is turned off and there is no input of the video signal, the display panel 110 of the device of the present invention is upward or downward. Rotate in the reverse direction as much as it is adjusted in the direction to return to the original position and then end the operation.

That is, the display panel 110 is controlled by storing the input through the up and down and left and right control keys 310 and 320 in the microcomputer 350 and controlling the up and down and left and right driving means 250 and 150 as opposed to the input up or down direction. Will be reset.

According to the method described above, the display panel of the thin film display device to which the present invention is applied is controlled by the user's key input to the desired position, and automatically returns when there is no synchronization signal as a video signal. .

[Effects of the Invention]

According to the configuration and operation of the present invention as described above, in the thin film type display device, the angle of the display panel can be adjusted as desired by the user, thereby achieving an effect of improving the display contrast of the display device and obtaining excellent screen gradation. do.

In addition, when the present invention is applied to a wall-mounted thin film display device, since the user can change the angle of the display panel as desired by the user at a remote location, there is an effect that can be variously utilized regardless of the installation position of the display device. .

When the limit position of the up, down, left, and right rotations is sensed through the up, down, left, and right limit switches, driving of the up, down, left, and right driving means is stopped to prevent overload of the up, down, left, and right driving means, When there is no input of the video signal, it is automatically determined to return the position of the display panel to the original position, thereby achieving the effect of convenience in the next use.

While the invention has been shown and described with respect to certain preferred embodiments, it will be appreciated that the invention can be modified and modified in various ways without departing from the spirit or scope of the invention as set forth in the claims below. One of ordinary skill in the art will readily know.

Claims (2)

In the thin-film display device provided with the display panel 110 used as a display device of a computer device or a display device of an image medium. An up and down adjustment key 310 as an input of a control command for the user to rotate the display panel 110 up and down; Left and right control keys 320 as an input of a control command for the user to rotate the display panel 110 to the left and right axes; An upper limit switch 230 for detecting a limit position of the rotation when the display panel 110 rotates forward by the vertical driving means 250; A lower limit switch 220 for detecting a limit position of the rotation when the display panel 110 rotates in the reverse direction by the vertical driving means 250; A leftward limit switch 125 for detecting a limit position of the rotation when the display panel 110 rotates in the reverse direction by the left and right driving means 150; A right limit switch 130 for detecting a limit position of the rotation when the display panel 110 rotates forward by the left and right driving means 150; An A / D converter 340 for processing an input of a synchronization signal as a video signal input of the display device; After outputting a control signal for adjusting the display panel 110 up, down, left and right according to the input of the up, down, left and right control keys 310 and 320, the up, down, left and right limit switches 230, 220, 25 When the limit position of rotation is sensed through 130, a control signal for stopping adjusting the display panel 110 up, down, left, and right is output, and there is no input of a synchronization signal through the A / D converter 340. In this case, the microcomputer 350 outputs a control signal for returning the display panel 110 to the display panel 110 by rotating the display panel 110 in the reverse direction by adjusting the up, down, left, and right directions; Vertical driving means (250) for rotating the display panel (110) in the forward or reverse direction to adjust the vertical angle of the display panel (110) by the control signal of the microcomputer (350); And It characterized in that it comprises a left and right drive means 150 for rotating the display panel 110 in the forward or reverse direction in order to adjust the left and right angle of the display panel 110 by the control signal of the microcomputer (350). Display panel angle control device for thin film display. Display panel for a display panel angle adjusting device having an up and down control key 310 for adjusting the up and down angle of the display panel 110 and a left and right adjustment key 320 for adjusting the left and right angles of the display panel 110 of the thin film display device. In the angle control method, A key input determination step (ST11) for determining whether the key has been pressed so as to perform step ST12 while the key is pressed; Forward driving to determine whether the lower and left limit switches 220 and 125 are on or both the upper and right limit switches 230 and 130 and the lower and left limit switches 220 and 125 are turned off. Reverse drive selection step ST12; If the result of the judgment in the forward drive reverse drive selection step ST12 is YES, the forward drive control step ST13 for driving the up, down, left and right drive means 250 and 150 in the forward direction ' It is determined whether the upper and right limit switches 230 and 130 are on, and if no, the forward drive control step ST13 is continued, and if yes, the forward limit step is performed to perform the driving means stop step ST18. Switch determination step ST14; It is determined whether the input level of the vertical synchronous signal electrically input to the display device is low and the input level of the horizontal synchronous signal is low, and if yes, the reverse driving control step (ST16) is performed. If no, the key input is performed. A synchronization signal input determination step ST15 for performing the determination step ST11; A reverse drive control step (ST16) for driving the up, down, left and right drive means (250, 150) in the reverse direction when the determination result of the forward drive reverse drive selection step (ST12) is NO; It is determined whether the lower and left limit switches 220 and 125 are on, and if it is no, the reverse driving control step ST16 is continued, and if yes, the reverse limit allowing the driving means stop step ST18 to be performed. Switch determination step St17; And Stop means for stopping the driving of the up, down, left and right drive means 250, 150 when the determination result of the forward limit switch determination step ST14 is YES or the determination result of the reverse limit switch determination step ST17 is YES. And a display panel angle control method of the thin film type display device.