KR19980038343A - Display panel angle adjusting device and control method of thin film display device - 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. In particular, the thin film type display device can be moved up and down according to input of up and down control keys and left and right control keys to have an optimal screen angle according to a user's intention. A display device adjustable left and right and a control method thereof.

The apparatus of the present invention 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, the main component of which is a vertical axis drive means 250, vertical limit switch 220, vertical direction Limit switch 220, left and right drive means 150, left and right limit switch 125, left and right limit switch 130, up and down control key 310, left and right adjustment key 320, A / D converter ( 340 and the microprocessor 350, the angle of the display panel can be adjusted as desired by the user in the thin-film display device, so that the display contrast of the display device can be improved and excellent screen gradation can be obtained. The effect can be achieved.

Description

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

The present invention relates to a display panel angle adjusting device and a control method thereof of the thin film type display device. In particular, the thin film type display device can be moved up and down according to input of up and down control keys and left and right control keys to have an optimal screen angle according to a user's intention. A display device adjustable left and right 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 used as the display device. However, due to the problems of volume, power consumption, and weight of the display device, the image display device of the related art has been used. The use of thin film 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, wall-mounted or self-supporting thin film display device is shown in FIG. 1.

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

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

In such a liquid crystal display, a difference in brightness between one pixel on and off is called contrast or contrast, and the contrast value is defined as a value obtained by dividing the difference between two brightness values by the larger of the two values. As the contrast value approaches 1, it is an excellent display device. Medium contrast contrast is also 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, contrast is different 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 surface, whereby the desired performance of the liquid crystal display device cannot be exhibited evenly. There is a problem.

In a liquid crystal display device using a thin film transistor (TFT) of the state of the art, a 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 and down, left and right so that the optimum angle is maintained according to the user's physical condition. However, in the thin film display device which is the object of the present invention, since the structure of the stand part is different from that of the cathode ray tube display device, there is also a problem that the conventional angle adjusting method using the stand part cannot be applied as it is.

On the other hand, if the display device is stored in a desk with a transparent glass plate or the like, or if the display device is located in a high place in the case of a wall-mounted television, or if it is difficult to access the display panel of the display device, Since the angle of the display device cannot be adjusted, the device of the present invention is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and the angle of the display panel of the thin film display device can be adjusted to a desired perspective so that the user of the thin film monitor can use the display quality of the display device in the best condition. It is an object of the present invention to provide a display panel angle adjusting device and a control method of the thin film type display device that can be adjusted according to the intention.

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 sectional view taken along the line A-A 'of FIG. 2 (B), showing the configuration of the display panel driving means 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 type display device (main frame) 110: display panel

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

112: pinion gear 113: replacement car

120: middle frame 125: left limit switch

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

250: drive means (up and down) 151,251: drive shaft

220: downward limit switch 230: upward limit switch

310: up and down adjustment keys 320: left and right adjustment keys

340: A / D converter 350: microprocessor

In order to accomplish the above object, the present invention provides a thin film type display device which is used as a display device of a computer device or a display device of an image medium, wherein the angle of the display panel is adjusted in order to adjust the upper and lower angles of the display panel of the thin film display device. Up and down axis direction driving means for rotating in the forward or reverse direction, up and down direction limit switch for detecting the limit position of the rotation when the display panel rotates in the reverse direction by the up and down axis direction driving means, The display panel is the up and down axis Up and down limit switches for detecting the limit position of the rotation when the direction is rotated by the direction drive means, and to rotate the angle of the display panel in the forward or reverse direction to adjust the left and right angles of the display panel of the thin film display device. Left and right axial drive means, the display panel is driven by the left and right drive means Left and right reverse limit switch for detecting the limit position of the rotation when rotating in reverse direction, left and right limit switch for detecting the limit position of the rotation when the display panel rotates forward by the left and right direction driving means, Up and down adjustment keys as inputs of a control command for rotating the display panel up and down, left and right adjustment keys as inputs of a control command for rotating the display panel left and right, and a synchronization signal as a video signal input of the display device. A / D converter for processing the input of a thin film type, characterized in that it comprises a microprocessor for receiving the input of the two control keys and controls the left and right drive means and the vertical drive means according to a predetermined algorithm A display panel angle adjusting device of a display device is provided.

In addition to the above configuration as a preferred embodiment of the display panel angle adjusting device of the thin film display device of the present invention, the up and down adjustment keys and the left and right adjustment keys may be configured to be remotely controlled by the winch control means. .

In addition, the present invention as a display panel angle control method of the display device for achieving the above object, it is determined whether the key is pressed, if the key is pressed to perform the following step ST12, if the key is not pressed, the following ST15 step Key input determination step (ST11) to perform, forward and reverse drive selection step of determining whether the reverse limit switch (125,220) is on or whether both the forward limit switch (130, 230) and the reverse limit switch (125,220) is off (ST12), if the determination result in the forward drive / reverse drive selection step (ST12) is YES, the forward drive control step (ST13) for driving the display panel drive means (150, 250) in the forward direction, the forward limit switch (130,230) If it is determined to be ON, and if NO, the forward drive control step ST13 is continued. If YES, the following drive means stop step ST17 is continued. In the case of the positive limit switch determination step (ST14) to be performed, the input of the vertical synchronous signal electrically input to the display device is at a low level and the input level of the horizontal synchronous signal is low. If no, the determination result of the synchronization signal input determination step (ST15), the forward drive / reverse drive selection step (ST12) to perform the key input determination step (ST11) is no, When the determination result of the synchronization signal input determination step ST15 is YES, it is determined whether the reverse driving control step ST16 for driving the driving means 150 and 250 in the reverse direction and the reverse limit switches 125 and 220 are turned on. In case of the above, the reverse drive control step ST16 is continued, and in the case of the case, the reverse limit switch judgment is made to perform the following drive means stop step ST18. When the determination result of the system ST17 and the forward limit switch determination step ST14 is YES or the determination result of the reverse limit switch determination step ST17 YES, the driving of the driving means 150 or 250 is stopped. It provides an angle control method comprising a driving means stop step (ST18).

According to the configuration of the present invention described above, the control action for the two driving means for adjusting the upper and lower angles and the left and right angles of the display panel of the thin film display device is made by using the up and down adjustment keys and the left and right adjustment keys, the control keys They are installed in devices 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.

Its main components as driving means for driving the display panel are the vertical axis direction driving means 250, the lower limit switch 220, the upper limit switch 230, the left and right axis driving means 150, the right direction The limit switch 125, the left limit switch 130, the up and down adjustment knob 310, the left and right adjustment knob 320, and the microprocessor 350.

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

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

FIG. 2B is a detailed view showing the configuration of the display panel driving means of the thin film display device, and FIG. 2C 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 driving the driving means will be described with reference to FIGS. 2B and 2C.

Reference numeral 110 denotes a display panel of the thin film display device. The display panel surface 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 in accordance with 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 400 is an intermediate frame 120 to which the vertical drive means 250 is fixed and supported. Two support means (not shown) of the up-and-down rotation shaft 111, which can 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, the pinion 112 connected to the rotation shaft 251 of the driving means is rotated, such that the counterpart 113 is rotated. Will move. Since the replacement wheel 113 is fixed to the lower end of the display panel, the display panel 110 rotates about the vertical rotation axis 111 as the pinion 112 rotates.

Here, two limit switches 130 and 230 are fixed to the side of the substitute 113. Accordingly, when the displacement 113 moves, the limit switches 130 and 230 come into contact with the protruding jaw 401 of the intermediate frame 120, so that the contacts of the switches are connected at a predetermined angle to generate electrical signals. Can be.

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. In this case, the left and right driving means 150 is fixed to the main frame 100 of the thin film display device. In addition, the intermediate frame 120 has a left and right support shaft 121 serving as a center for rotating the intermediate frame 120 seen left and right on the upper and lower portions of the upper and lower portions.

When the left and right driving means 150 rotates, the upper and lower frames 400 are rotated based on the main frame 100 of the thin film display device due to the action of the rack and the pinion as described above. Rotate around 121).

The forward limit switches 130 and 230 and the reverse limit switches 125 and 220 used in the present invention are installed to detect the maximum rotation position when the display panel 110 of the display device rotates along its rotation axis.

Here, the forward limit switches 130 and 230 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 switches 125 and 220 are installed at the maximum positions when the display panel 110 rotates to the opposite side, and the maximum limit switches 125 and 220 are used to block the rotation driving of the driving means 150 and 250 of the display panel 110. It acts as a value sensing means.

Since the limit switches are respectively installed with respect to the vertical axis of rotation, and are respectively installed with respect to the left and right axis of rotation, all four limit switches are used.

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 microprocessor 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 to the various keys as input means, such as an existing keyboard of the computer, by adding the up and down keys and the left and right keys of the present invention, 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 installing the control keys of the present invention in a transmitter having a remote control function of the existing 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 converter 340 checks the frequency of H. SYNC and the frequency of V. SYNC as a synchronization signal. 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 key input means of the present invention at regular intervals.

The keys in the key input means are provided one by one with respect to one axis of the up, down, left and right rotation shafts 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.

The key input determination step ST11 determines whether the up / down control key or left / right control key of the display panel 110 of the display device of the present invention is pressed, and performs the following steps ST12 and subsequent steps only while the key is pressed. While the key is not pressed, step ST15 is performed.

Step ST12 is a forward drive reverse drive selection step of the drive means 150, 250 for determining whether the reverse limit switch is on or whether both the forward limit switch and the reverse limit switch are off.

In this step, the reverse limit switch turned on means that the display panel 110 has the maximum angle in the reverse direction. In addition, the fact that both limit switches are off means that the display panel 110 is located at an intermediate position, not at both ends.

Therefore, if the determination result in the forward drive reverse drive selection step ST12 of the drive means is YES, the forward drive control step ST13 for driving the drive means in the forward direction 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 in the reverse direction is performed.

While the driving means rotates in the forward direction, in the forward limit switch determination step (ST14), it is determined whether the limit switch 130 is on, and if it is no, continue the forward drive control step (ST13). The driving means stop step ST18 is performed.

Further, while the driving means rotates in the reverse direction, in the reverse limit switch determination step (ST17), it is determined whether the limit switch 120 is on, and if no, continue the reverse drive control step (ST16). The following drive means stop step (ST18) to perform.

Finally, in the driving means stop step ST18, 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, the driving of the driving means is stopped. .

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

In this step, the display panel returns to its original position when there is no input of the control key and when no synchronization signal is input, 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. It is a step of generating a extract signal. If the determination result of this step is YES, the following reverse driving control step ST16 is performed. If NO, the key input determination step ST1 is performed.

Therefore, when there is no input of a control key and no input of a synchronous signal, that is, when the power supply of the computer device or the image display device is turned off and there is no input of the image signal, the display panel 110 of the device of the present invention is a reverse limit switch. The operation can be terminated as far as it can turn upside down.

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

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, so that the display contrast of the display device can be improved and an excellent screen gradation can be obtained. Is achieved.

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

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 (5)

In a thin film type display device used as a display device of a computer device or a display device of an image medium, the angle of the display panel 110 is rotated in a forward or reverse direction to adjust the angle of the display panel 110 of the thin film display device. Up and down axial drive means 250 and the vertical and reverse direction limit switch 220 for detecting the limit position of the rotation when the display panel 110 is rotated in the reverse direction by the up and down axial drive means 250, When the display panel 110 is rotated forward by the vertical axis driving means 250, the vertical limit switch 230 for detecting the limit position of the rotation, the display panel 110 of the thin film display device Left and right axial drive means 150 for rotating the angle of the display panel 110 in the forward or reverse direction to adjust the left and right angles, and the display panel 110 is the left and right drive means (1). 50) the left and right reverse limit switch 125 for detecting the limit position of the rotation when the rotation is reversed, the display panel 110 of the rotation when the forward rotation by the left and right drive means 150 Left and right limit switch 130 for detecting the limit position, up and down adjustment key 310 as an input of a control command for the user to rotate the display panel 110 in the up and down axis, the user to the display panel 110 Left and right adjustment key 320 as an input of a control command for rotating the left and right axes, an A / D converter 340 for processing an input of a synchronization signal as a video signal input of the display device, and the two adjustment keys 310. And a microprocessor 350 which receives the input of 320 and controls the left and right axis driving means 150 and the vertical axis driving means 250 according to a predetermined algorithm. A display panel an angle regulating apparatus of a display device. The display panel angle control device of claim 1, wherein the up and down control keys and the left and right control keys are controlled by a remote control means. The thin film type device of claim 1 or 2, wherein the microprocessor (350) further includes an input from an A / D converter 340 for processing an input of a synchronization signal as a video signal input of a display device. Display panel angle adjuster of display device. A device for allowing a user to adjust the angle of the display panel 110 of the thin film type display device 100. A key 310 for adjusting the top and bottom of the angle of the display panel 110, and a key for adjusting the left and right sides of the display panel angle. For the display panel angle adjusting device having the display panel 320, in the vertical or horizontal adjustment method of the angle of the display panel 110, it is determined whether the key is pressed, and the following step ST12 is performed while the key is pressed. Forward drive / reverse drive selection for determining whether the key input determination step (ST11), the reverse limit switch (125, 220) is on or whether both the forward limit switch (130, 230) and the reverse limit switch (125, 220) is off In step ST12, if the determination result in the forward drive / reverse drive selection step ST12 is YES, the forward drive control step ST13 for driving the display panel drive means 150, 250 in the forward direction, the forward limit switch 130 , If it is determined that 230 is ON, and if NO, the forward driving control step ST13 is continued, and if yes, the forward limit switch determination step ST14 to perform the following driving means stop step ST17, the forward direction When the determination result of the drive / reverse drive selection step ST12 is NO, it is determined whether the reverse drive control step ST16 for driving the drive means 150, 250 in the reverse direction and the reverse limit switches 125, 220 are on. If the judgment is No, the reverse drive control step (ST16) continues, and if yes, the reverse limit switch determination step (ST17) to perform the following drive means stop step (ST18), 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 for stopping the driving of the driving means 150 or 250 is positive. Display panel angle control method of a thin film display device comprising: a step (ST18). 5. The method of claim 4, wherein it is determined whether the input of the vertical synchronous signal electrically input to the display device is at a low level and the input level of the horizontal synchronous signal is low. If no, further comprising a synchronization signal input determination step (ST15) to perform the key input determination step (ST11), characterized in that it comprises the step of generating a retract signal when there is no synchronization signal input Display panel angle control method of a thin film type display device.