JPH0638136A - Screen angle variable type display device and method for adjusting its contrast automatically - Google Patents

Abstract

PURPOSE:To provide the screen angle variable type display device in which an angle of the screen is adjusted and a contrast optimum to the angle of the screen is automatically adjusted to reduce the time required for adjusting the screen. CONSTITUTION:An angle of a screen 3 with respect to a main body deice 2 is varied, a contrast control section adjusts the contrast of the screen 3, a screen angle detection switch 7 detects the variable angle of the screen 3, data of the contrast state corresponding to the variable angle of the screen 3 are stored in a storage means, and when the angle of the screen 3 with respect to the main body device 2 is varied, the contrast automatic adjustment means adjusts automatically the contrast of the screen 3 based on the result of detection from the screen angle detection switch 7 and the data stored in the storage means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable screen angle display device having an angle adjusting mechanism for changing the angle of the screen with respect to the main device, and a contrast control section for adjusting the contrast of the screen, and automatic contrast adjustment thereof. It is about the method.

[0002]

2. Description of the Related Art Conventionally, for example, a display device used in a small television, a word processor, a personal computer or the like, regardless of whether it is a liquid crystal display or a CRT, has an angle adjustment for varying the angle of the screen with respect to the main body device including the orientation. There is a variable screen angle display device that includes a mechanism and a contrast control unit that adjusts the contrast of the screen.

[0003]

By the way, in the screen angle variable type display device configured as described above, since the user can freely change the screen angle depending on the installation location or the like, the screen angle can be changed. It may be necessary to adjust the contrast corresponding to the angle of the screen at the same time as the adjustment.

Further, in the case of a liquid crystal screen, there is a method of making the screen easier to see by adjusting the angle of the entire display device or moving the user's own place because the viewing angle is narrow due to the characteristic of the liquid crystal. In particular, in a vehicle interior where the installation location is limited, the main device needs to be fixed due to the installation conditions, so the angle of the screen inevitably depends on the adjustment by the angle adjustment mechanism. If the screen is difficult to see even if the angle is adjusted within the above range, it is necessary to make the screen easy to see by adjusting the contrast, and it takes time to obtain the optimum legibility.

In view of the above situation, the present invention can reduce the time required for setting the screen by adjusting the angle of the screen and automatically adjusting to the optimum contrast corresponding to the screen angle. An object is to provide a variable angle display device.

[0006]

In order to achieve the object, an invention according to claim 1 is to provide an angle adjusting mechanism for changing an angle of a screen with respect to a main body device, and a contrast control section for adjusting a contrast of the screen. In a variable screen angle display device including: a screen angle detecting means for detecting a variable angle of the screen by the angle adjusting mechanism; and a contrast state of the contrast control unit corresponding to the variable angle of the screen is stored as data. The present invention is characterized by comprising storage means and automatic contrast adjustment means for automatically adjusting the contrast of the screen based on the detection result from the screen angle detection means and the data stored in the storage means. Is.

Further, the invention according to claim 2 is such that an angle adjusting mechanism for changing the angle of the screen with respect to the main device, a contrast control section for adjusting the contrast of the screen, and a variable angle of the screen by the angle adjusting mechanism. Screen angle detection means for detecting the following, a storage means for storing the contrast state of the contrast control section corresponding to a variable angle of the screen as data, a detection result from the screen angle detection means and the storage means. A contrast automatic adjusting means for automatically adjusting the contrast of the screen based on the data, and when the angle of the screen is adjusted, the screen angle detecting means detects it and corresponds to the angle of the screen after adjustment. The contrast data is read from the storage means to automatically adjust the screen, and after the automatic adjustment, the When the contrast of the surface is corrected by the contrast control unit, the correction data is output to the storage unit, and the correction data is newly stored corresponding to the screen angle detection unit by a predetermined operation of the storage unit. It is what is done.

[0008]

In the above-mentioned structure according to claim 1,
The angle of the screen with respect to the main unit is changed by the angle adjusting mechanism, and the contrast of the screen can be adjusted by the contrast control unit. Also, the plane angle detecting means detects the variable angle of the screen by the angle adjusting mechanism and Data of the contrast state of the contrast control unit corresponding to the variable angle is stored in the storage means. On the other hand, when the angle of the screen with respect to the main unit is changed by the angle adjusting mechanism, the contrast of the screen is automatically adjusted based on the detection result from the screen angle detecting unit and the data stored in the storing unit by the automatic contrast adjusting unit. Is adjusted to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the variable screen angle display device of the present invention is applied to a small liquid crystal television, and a description will be given based on FIGS.

FIG. 1 shows a variable screen angle display device according to the present invention. FIG. 1A is a perspective view showing the appearance of a small liquid crystal television.
(B) is an explanatory diagram of the angle detection switch, FIG. 2 is a block diagram showing a schematic configuration of the present invention, FIG. 3 is an explanatory diagram showing an example of a storage state of a storage means, and FIG. 4 is a flow chart showing an operation of the present invention. Is.

In FIG. 1 (A), reference numeral 1 is a small liquid crystal television, in which a main body device 2 and a screen 3 are connected via an arm 4 having a support shaft (not shown) as an angle adjusting mechanism.

The screen 3 includes a display section 3a, channels and audio volumes, and the UP / DOWN key 5 shown in FIG.
The contrast control unit 5 including a and 5b and the operation unit 3b such as the memory setting button switch 6 (MEMORY key) are provided. Further, the connecting portion between the screen 3 and the arm 4 is shown in FIG. As shown, an angle detection switch 7 as a screen angle detection means for detecting the angle of the screen 3 stepwise.
Is provided.

The contacts 7a, 7 of the angle detection switch 7
The position information from b ... 7f (for example, at 6 places) is output to the control device (CPU) 8.

The control device 8 outputs the detection data output from the contacts 7a, 7b ... 7f of the angle detection switch 7 to the storage means (memory) 9 and based on the contrast data stored in the storage means 9. An automatic contrast adjustment signal is output to a contrast adjustment driver (hereinafter simply referred to as “driver”) 10 as an automatic contrast adjustment means for automatically adjusting the contrast of the screen 3. Further, output signals from the UP / DOWN keys 5a and 5b and the memory setting button switch 6 are input to the control device 8.

As shown in FIG. 3, the storage means 9 has a memory address corresponding to each contact 7a, 7b ... 7f of the angle detection switch 7 on a one-to-one basis. The contrast suitable for the angle of the screen 3 corresponding to each contact 7a, 7b ... 7f is stored as contrast data.

The contrast data is UP /
When the contrast is newly set by pressing the DOWN keys 5a and 5b, the memory setting button switch 6
The correction operation is set so as to correspond to each memory address by pressing.

Next, the operation of the present invention will be described with reference to FIG.

(Step 1) In Step 1, any one of the contacts 7a, 7b ... 7f of the angle detection switch 7 is input to indicate that the screen 3 is in use.

(Step 2) In this Step 2, it is judged based on the output from the angle detection switch 7 whether or not the input from Step 1 has changed, that is, whether or not the angle of the screen 3 is variable. If it is determined that there is a change, the process proceeds to step 3, and if it is determined that there is no change, the process proceeds to step 4.
Transition to.

(Step 3) In Step 3, the contact 7 after changing out of the contrast data stored in the storage means 9 by the input from the contacts 7a, 7b ... 7f after changing.
a, 7b ... 7f based on the contrast data of the memory address corresponding to the memory address
It is output to 0 and the contrast of the screen 3 is automatically adjusted.

(Step 4) In step 4, after the contrast of the changed screen 3 is automatically adjusted,
Further, it is determined whether or not the UP key 5a has been pressed, that is, whether or not the contrast has been corrected in the bright direction. If there is correction, the process proceeds to step 5, and if there is no correction, the process proceeds to step 6. .

(Step 5) In step 5, the contrast is increased in the UP direction, that is, based on the pressing of the UP key 5a.
At the same time as changing to the bright direction, the contrast correction data is output to the storage means 9 and the process proceeds to step 8.

(Step 6) In step 6, after the contrast of the variable screen 3 is automatically adjusted,
Further, it is determined whether or not the DOWN key 5b has been pressed, that is, whether or not the contrast has been corrected in the dark direction. If there is correction, the process proceeds to step 7, and if there is no correction, the process loops to step 1. It

(Step 7) In Step 5, DOWN
The contrast is changed to the DOWN direction, that is, the dark direction based on the pressing of the key 5b, and at the same time, the contrast correction data is output to the storage means 9 and the process proceeds to step 8.

(Step 8) In Step 8, it is judged by pressing the memory setting button switch 6 whether or not the contrast correction data outputted from Step 5 or Step 7 should be newly stored in the storage means 9.

That is, since the contrast correction for the angle of the screen 3 by the UP / DOWN keys 5a and 5b pressed in step 4 or step 6 is temporary, the contrast data of the memory address stored in the storage means 9 Is not rewritten, and the contrast data of the memory address stored in the storage means 9 is rewritten in order to make the correction of the contrast fixed. When not rewritten, the memory setting button switch 6 Is not pressed, the process loops to step 1, and when rewriting, the memory setting button switch 6 is pressed, so the process proceeds to step 9.

(Step 9) In step 9, the contrast correction data is overwritten in the memory address of the storage means corresponding to the input position of the contacts 7a, 7b ... Contact 7a,
When the input from 7b ... 7f is changed to the input of the contact points 7a, 7b ... 7f, the contrast after correction is automatically adjusted. When the storage setting in the storage means 9 is completed, the process loops to step 1.

By the way, in the above-mentioned embodiment, the present invention is applied to the small-sized liquid crystal television 1 for a vehicle or the like, but it is needless to say that the present invention can be applied to all display devices whose screen angle and contrast can be adjusted. .

[0029]

As described above, according to the variable screen angle display device of the present invention, the screen angle is adjusted, and at the same time, the screen is automatically adjusted to the optimum contrast corresponding to the screen angle. It is possible to shorten the time required for setting.

[Brief description of drawings]

FIG. 1 shows a display device with variable screen angle according to the present invention,
(A) is a perspective view showing the external appearance of a small liquid crystal television, and (B) is an explanatory view of an angle detection switch.

FIG. 2 is a block diagram showing a schematic configuration of the present invention.

FIG. 3 is an explanatory diagram showing an example of a storage state of storage means of the present invention.

FIG. 4 is a flowchart showing the operation of the present invention.

[Explanation of symbols]

1 Small LCD TV (variable screen angle display device) 2 Main device 3 Screen 5 Contrast control section 7 Screen angle detection switch (screen angle detection means) 9 Storage means (memory) 10 Contrast adjustment driver (contrast automatic adjustment means)

Claims (2)

[Claims] 1. A screen angle variable type display device comprising an angle adjusting mechanism for changing an angle of a screen with respect to a main body device and a contrast control section for adjusting a contrast of the screen, wherein the screen is changed by the angle adjusting mechanism. Screen angle detection means for detecting an angle; storage means for storing the contrast state of the contrast control section corresponding to a variable angle of the screen as data; detection results from the screen angle detection means and the storage means And a contrast automatic adjustment means for automatically adjusting the contrast of the screen based on the data described above. 2. An angle adjusting mechanism for changing the angle of the screen with respect to the main body device, a contrast control section for adjusting the contrast of the screen, and a screen angle detecting means for detecting a variable angle of the screen by the angle adjusting mechanism. A storage unit that stores the contrast state of the contrast control unit corresponding to the variable angle of the screen as data, and the contrast of the screen based on the detection result from the screen angle detection unit and the data stored in the storage unit. A contrast automatic adjusting means for automatically adjusting, and when the angle of the screen is adjusted, the screen angle detecting means detects this and the contrast data corresponding to the angle of the screen after adjustment is stored from the storage means. The screen is automatically adjusted by calling and the contrast of the screen is adjusted after the automatic adjustment. When the correction data is corrected by the last control unit, the correction data is output to the storage unit, and the correction data is newly stored corresponding to the screen angle detection unit by a predetermined operation of the storage unit. And automatic contrast adjustment method.