JPH11298828A - Viewfield angle adjusting device and viewfield angle adjusting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically adjust the angle of viewfield of a display by deciding a voltage applied to the display based on the angle of viewfield of a detected viewer. SOLUTION: A viewfield angle detecting part 14 detects the angle of vidwfield of a viewer to a liquid crystal panel 23. When the part 14 detects the angle of viewfield of the viewer, a viewfield angle adjusting part 17 decides a contrast voltage and a brightness voltage which are applied to the panel 23 based on the angle of viewfield of the viewer when the angle of viewfield of the viewer is different from the last time. And, when the contrast voltage and the brightness voltage in which the temperature is corrected, are outputted from the part 17, a liquid crystal driving circuit 22 applies the contrast and brightness voltages to the panel 23 and adjusts the angle of viewfield of the panel 23. A voltage that is applied to the panel 23 is determined based on the angle of view field of the detected viewer by the part 14 in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viewing angle adjusting device and a viewing angle adjusting method for improving visibility of a display.

[0002]

2. Description of the Related Art FIG. 11 is a block diagram showing a conventional view angle adjusting device disclosed in, for example, Japanese Utility Model Application Laid-Open No. 6-15095. In FIG. A TV tuner that outputs a signal to the display 8, a data control unit 2 that outputs a computer video signal, a communication bus 3, an operation key 4 that selects a TV video or a computer video, and a data output unit 5 that is output from the data control unit 2 A microcomputer that transfers the video signal of the computer to the display 8 and adjusts the brightness of the display 8; 6, a memory that stores brightness data for television video; 7, a memory that stores brightness data for computer video; Is a display for displaying television images or computer images.

Next, the operation will be described. First, when displaying an image on the display 8, the viewer operates the operation key 4.
Is operated to select a television image, the television image signal received by the TV tuner 1 is output to the display 8, and the television image is displayed on the display 8.
At this time, the microcomputer 5 refers to the luminance data stored in the memory 6 and adjusts the luminance of the display 8 to a value suitable for a television image.

On the other hand, when a viewer operates the operation keys 4 to select a computer image when displaying an image on the display 8, a computer image signal output from the data control unit 2 is output to the display 8, and An image is displayed on the display 8. At this time, the microcomputer 5 refers to the luminance data stored in the memory 7 and adjusts the luminance of the display 8 to a value suitable for the computer image.

[0005] In addition to the above-mentioned conventional example, Japanese Patent Laid-Open Publication No. Hei 6 (1994) discloses a technique in which, when an adjustment volume of a display (liquid crystal panel) is operated, a contrast adjustment circuit and a brightness adjustment circuit are interlocked to adjust contrast and brightness in opposite directions. -22249. According to such a conventional example, when the viewing angle of the viewer with respect to the display 8 changes, the viewing angle of the display 8 can be adjusted. However, the viewing angle of the display 8 is not automatically adjusted. Need to be adjusted.

[0006]

Since the conventional viewing angle adjusting device is configured as described above, when an image object (television image or computer image) on the display 8 is selected, the brightness of the display 8 is changed to the image. Although the value is automatically adjusted to a value suitable for the object, even if the viewer's viewing angle to the display 8 changes and the visibility of the display 8 deteriorates, means for automatically adjusting the viewing angle of the display 8 is provided. Therefore, there is a problem that the visibility of the display 8 cannot be improved.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a viewing angle adjusting device and a viewing angle which can automatically adjust the viewing angle of a display when a viewer's viewing angle with respect to the display changes. The purpose is to obtain an angle adjustment method.

[0008]

SUMMARY OF THE INVENTION A viewing angle adjusting apparatus according to the present invention determines a voltage to be applied to a display based on a viewer's viewing angle detected by a viewing angle detecting means.

The viewing angle adjusting device according to the present invention determines the voltage to be applied to the display based on the type of the vehicle detected by the vehicle type detecting means.

[0010] The viewing angle adjusting apparatus according to the present invention determines the voltage to be applied to the display based on the viewer's seat specified by the specifying means.

[0011] The viewing angle adjusting device according to the present invention determines the voltage to be applied to the display based on the viewer's seat detected by the seat detecting means.

In the viewing angle adjusting apparatus according to the present invention, when the seat position of the viewer is adjusted, the voltage applied to the display is determined in consideration of the adjustment result.

The viewing angle adjusting device according to the present invention determines a voltage to be applied to a display in consideration of a type of an image.

The viewing angle adjusting device according to the present invention is configured to determine the voltage to be applied to the display based on the brightness of the display detected by the brightness detecting means.

The viewing angle adjusting device according to the present invention determines the voltage applied to the display in consideration of the temperature of the display.

The viewing angle adjusting device according to the present invention is adapted to determine the scanning direction of the video signal corresponding to the mounting angle of the display detected by the angle detecting means.

In the viewing angle adjusting method according to the present invention, when a viewer's viewing angle with respect to the display is detected, a voltage to be applied to the display is determined based on the viewer's viewing angle.

In the viewing angle adjusting method according to the present invention, when a type of a vehicle equipped with a display is detected, a voltage to be applied to the display is determined based on the type of the vehicle.

In the viewing angle adjusting method according to the present invention, when a seat of a viewer is designated, a voltage to be applied to a display is determined based on the seat of the viewer.

In the viewing angle adjusting method according to the present invention, when a seat of a viewer is detected, a voltage to be applied to a display is determined based on the seat of the viewer.

In the viewing angle adjusting method according to the present invention, when the brightness of the display is detected, the voltage to be applied to the display is determined based on the brightness of the display.

In the viewing angle adjusting method according to the present invention, when a mounting angle of a display is detected, a scanning direction of a video signal corresponding to the mounting angle of the display is determined.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 1 of the present invention. In the drawing, reference numeral 11 denotes operation keys for inputting various information, and 12 denotes a computer video signal (for example, a navigation video signal). A TV control unit that receives a TV video signal and outputs the TV video signal;
14 is, for example, an image of a viewer, its eyes and posture,
A viewing angle detection unit (viewing angle detection unit) that detects the viewer's viewing angle with respect to the liquid crystal panel 23 by detecting the position of the head or the like, or calculating from the adjustment position of the rearview mirror, the side mirror, or the seat. ) And 15 are image type detection units (image type detection means) for detecting the type of image displayed on the liquid crystal panel 23, and 16 is a temperature detection unit (temperature detection means) for detecting the temperature of the liquid crystal panel 23.

A viewing angle adjusting unit (voltage determining means) 17 determines a contrast voltage and a brightness voltage to be applied to the liquid crystal panel 23 based on the viewing angle of the viewer, the type of image, and the temperature of the liquid crystal panel 23. An input unit of the viewing angle adjustment unit 17; a memory 19 for storing a table indicating a correspondence relationship between a viewing angle of a viewer and a brightness voltage;
Is a CPU that determines a contrast voltage and a brightness voltage by referring to a table, 21 is an output unit of the viewing angle adjustment unit 17, and 22 is a unit that applies the contrast voltage and the brightness voltage determined by the viewing angle adjustment unit 17 to the liquid crystal panel 23. A liquid crystal drive circuit (applying means) 23 is a liquid crystal panel (display) for displaying television images or computer images. FIG. 2 is a flowchart showing a viewing angle adjusting method according to the first embodiment of the present invention.

Next, the operation will be described. First, the liquid crystal panel 23 is composed of a twisted cell in which liquid crystal is sealed between two glass substrates and a cell having a deflection angle different by 90 degrees from each other.
It is composed of two deflection plates. The liquid crystal molecules have a rod-like shape, and in a normally white liquid crystal panel, when no voltage is applied to the liquid crystal, the long axis of the liquid crystal molecules is parallel to the substrate of the twisted cell array. Become
Moreover, since the two substrates are sequentially arranged so as to be twisted by 90 degrees, the light turns and transmits through the two deflection plates.

When a voltage is applied to the liquid crystal, as the applied voltage increases, the long axes of the liquid crystal molecules rise from a plane parallel to each other, and the alignment is untwisted. Decrease. Thus, the liquid crystal panel 2
No. 3 can control the amount of light transmission by controlling the voltage applied to the liquid crystal. Therefore, in the range where the voltage applied to the liquid crystal can be controlled (the range in which the amount of light transmission can be adjusted), Is set so as to correspond to the white level of the image, while the maximum applied voltage is set so as to correspond to the black level of the image. indicate.

However, when the viewing angle of the viewer with respect to the liquid crystal panel 23 changes, the amount of light transmitted by the liquid crystal panel 23 to the viewer changes, so that depending on the viewing angle, a decrease in contrast, blackout, white spots, inversion, or the like may occur. Symptoms occur,
The visibility of the liquid crystal panel 23 deteriorates. Therefore, in the first embodiment, the viewing angle of the liquid crystal panel 23 is adjusted by adjusting the rising amount of the liquid crystal molecules in order to eliminate the deterioration of the visibility due to the change in the viewing angle. Here, the viewing angle means a range of the viewing angle at which an appropriate screen quality is obtained.

Specifically, first, since it is necessary to detect a change in the viewing angle of the viewer with respect to the liquid crystal panel 23, the viewing angle detection unit 14 detects the viewing angle of the viewer with respect to the liquid crystal panel 23 (step ST1). For example, if sensors for detecting the position of the viewer's seat, the inclination angle of the seat back, and the height of the top of the viewer's head are installed in an automobile or the like, the output of these sensors is used for the viewer. Detect the position of the eye. If the camera is installed in an automobile or the like, the position of the viewer's eyes may be detected from the video of the camera.

When the viewing angle detecting unit 14 detects the viewing angle of the viewer in this manner, the viewing angle adjusting unit 17 determines the viewing angle of the viewer based on the viewing angle of the viewer if the viewing angle is different from the previous viewing angle (step ST4). To determine the contrast voltage and the brightness voltage to be applied to the liquid crystal panel 23 (step ST
6). For example, in the case of a liquid crystal panel in which the viewing angle at which the contrast ratio of the liquid crystal panel 23 is maximized is in the upward direction, the contrast ratio is higher when the viewing angle is higher than the viewing angle at which the contrast ratio of the liquid crystal panel 23 is maximized. Is darker than when the liquid crystal panel 23 is viewed in the maximum state, so that the brightness voltage is lowered and the liquid crystal panel 2
The white level of No. 3 is emphasized (the lower the brightness voltage, the higher the black level and the lower the contrast ratio, so the contrast voltage is increased to emphasize black), and the viewing angle of the liquid crystal panel 23 is inclined upward.

On the other hand, when the liquid crystal panel 23 is viewed from below the viewing angle at which the contrast ratio of the liquid crystal panel 23 becomes maximum, the liquid crystal panel 23 has the maximum contrast ratio.
, The brightness level is increased, and the black level of the liquid crystal panel 23 is enhanced. (If the brightness level is increased, the white level is reduced and the contrast ratio is weakened. The voltage is lowered), and the viewing angle of the liquid crystal panel 23 is inclined downward.

More specifically, a table (table indicating the correspondence between the viewing angle of the viewer and the contrast voltage and the brightness voltage) in which the characteristics of the liquid crystal panel 23 are taken into consideration is stored in the memory 19 (see FIG. 3). The CPU 20 of the viewing angle adjustment unit 17 reads the contrast voltage and the brightness voltage corresponding to the viewing angle of the viewer from the memory 19, and determines the contrast voltage and the brightness voltage as the applied voltage of the liquid crystal panel 23.

However, the brightness of the image is usually different between the case where the image displayed on the liquid crystal panel 23 is a television image and the case where the image is a computer image. Unless the voltage applied to the liquid crystal panel 23 is adjusted, there is a problem that the viewing angle when displaying a television image and the viewing angle when displaying a computer image are different. Therefore, in the first embodiment, the CP of the viewing angle adjustment unit 17 is
As a table to be referred to by U20, a table for television images and a table for computer images are stored in the memory 19, so that a table to be referred to is selected according to the detection result of the image type detection unit 15 ( Steps ST2 and ST5).

When the liquid crystal panel 23 is, for example, a normally white liquid crystal panel, the liquid crystal panel 23 looks black when the temperature of the liquid crystal panel 23 rises. Temperature detector 1
The contrast voltage and the brightness voltage are corrected according to the detection result of step 6 (steps ST3 and ST7). For example,
As shown in FIG. 4, when the temperature of the liquid crystal panel 23 increases, the optimal brightness voltage decreases (the optimal contrast voltage increases), and when the temperature of the liquid crystal panel 23 decreases, the optimal brightness voltage increases (the optimal contrast voltage increases). If there is such a characteristic that the voltage decreases, the viewing angle adjustment unit 1
7, the contrast voltage and the brightness voltage read from the memory 19 are applied to the liquid crystal panel 2 respectively.
The contrast voltage and the brightness voltage are corrected by multiplying the temperature by 3 and the proportionality constant.

When the temperature-corrected contrast voltage and brightness voltage are output from the viewing angle adjusting unit 17, the liquid crystal drive circuit 22 applies the contrast voltage and brightness voltage to the liquid crystal panel 23, and Adjust the viewing angle of panel 23 (step ST1)
0).

When the viewing angle of the viewer is the same as the previous one, the previously determined contrast voltage and brightness voltage are used as the voltage applied to the liquid crystal panel 23 again.
Although the processing of steps ST5 to ST7 is not executed (step ST4), when the temperature of the liquid crystal panel 23 is different from the previous time, the contrast voltage and the brightness voltage determined last time are temperature corrected (steps ST8, ST9).

As is apparent from the above, the first embodiment
According to the configuration described above, the voltage applied to the liquid crystal panel 23 is determined based on the viewer's viewing angle detected by the viewing angle detection unit 14, so that the viewing angle of the liquid crystal panel 23 is automatically adjusted according to the viewer's viewing angle. An effect that can be adjusted is provided.

Embodiment 2 FIG. 5 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 2 of the present invention. In the drawing, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 24 denotes a vehicle type detection unit (vehicle type detection means) for detecting the type of vehicle on which the liquid crystal panel 23 is mounted.

Next, the operation will be described. In the first embodiment, the case where the voltage applied to the liquid crystal panel 23 is determined based on the viewing angle of the viewer has been described. However, when the liquid crystal panel 23 is mounted on an automobile or the like, if the type of the automobile is different, usually, Since the mounting position of the liquid crystal panel 23 is different,
The viewing angle of the viewer changes.

Therefore, in the second embodiment, when the vehicle type detecting unit 24 obtains, for example, the setting information of the vehicle type set in the navigation device and detects the type of the vehicle, the viewing angle adjusting unit 17 LCD panel 2 based on the type of
3 to determine a contrast voltage and a brightness voltage. More specifically, a table indicating the correspondence between the type of vehicle, the contrast voltage, and the brightness voltage (voltage set in consideration of the mounting position of the liquid crystal panel 23) is stored in the memory 19; 17 C
The PU 20 reads the contrast voltage and the brightness voltage corresponding to the type of the vehicle from the memory 19, and determines the contrast voltage and the brightness voltage as the voltage applied to the liquid crystal panel 23.

As is apparent from the above, the second embodiment
According to the configuration described above, the voltage applied to the liquid crystal panel 23 is determined based on the type of the vehicle detected by the vehicle type detection unit 24, so that it is possible to set an optimal viewing angle that matches the viewing angle of the viewer. The effect that can be performed.

Embodiment 3 FIG. 6 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 3 of the present invention. In the drawing, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 25 denotes a seat designation unit (designation means) for designating a seat of the viewer.

Next, the operation will be described. In the first embodiment, the case where the voltage to be applied to the liquid crystal panel 23 is determined based on the viewing angle of the viewer has been described. The viewer's viewing angle changes when sitting on a seat.

Therefore, in the third embodiment, when the viewer specifies a seat using the seat specifying unit 25, the viewing angle adjusting unit 17 adjusts the contrast voltage and the contrast voltage applied to the liquid crystal panel 23 based on the viewer's seat. Determine the brightness voltage. Specifically, since a table indicating the correspondence between the viewer's seat, the contrast voltage, and the brightness voltage (voltage set in consideration of the position of the seat) is stored in the memory 19, the viewing angle adjustment unit 17 The CPU 20 reads the contrast voltage and the brightness voltage corresponding to the seat of the viewer from the memory 19, and determines the contrast voltage and the brightness voltage as the voltages applied to the liquid crystal panel 23.

As is clear from the above, the third embodiment
According to the configuration, the voltage applied to the liquid crystal panel 23 is determined based on the viewer's seat specified by the seat specifying unit 25, so that the viewing angle of the liquid crystal panel 23 is automatically set according to the viewer's viewing angle. An effect that can be adjusted is provided.

Embodiment 4 FIG. 7 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 4 of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 26 denotes a seat detection unit (seat detection means) for detecting the seat of the viewer.

Next, the operation will be described. In the first embodiment, the case where the voltage to be applied to the liquid crystal panel 23 is determined based on the viewing angle of the viewer has been described. The viewer's viewing angle changes when sitting on a seat.

Therefore, in the fourth embodiment, when the seat detecting unit 26 detects the seat of the viewer by detecting the load of the seat, for example, the viewing angle adjusting unit 17 sets the liquid crystal based on the seat of the viewer. The contrast voltage and the brightness voltage applied to the panel 23 are determined. Specifically, since a table indicating the correspondence between the viewer's seat, the contrast voltage, and the brightness voltage (voltage set in consideration of the position of the seat) is stored in the memory 19, the viewing angle adjustment unit 17 The CPU 20 reads the contrast voltage and the brightness voltage corresponding to the seat of the viewer from the memory 19, and determines the contrast voltage and the brightness voltage as the voltages applied to the liquid crystal panel 23.

As is clear from the above, the fourth embodiment
According to the configuration, the voltage applied to the liquid crystal panel 23 is determined based on the viewer's seat detected by the seat detector 26, so that the viewing angle of the liquid crystal panel 23 is automatically set according to the viewer's viewing angle. An effect that can be adjusted is provided.

Embodiment 5 In the third and fourth embodiments, it is assumed that the position of the seat on which the viewer sits does not move, but when the seat position of the viewer is adjusted, the adjustment is applied to the liquid crystal panel 23 in consideration of the adjustment result. Determine the voltage. Specifically, when the position of the sheet can be adjusted stepwise, a plurality of tables corresponding to each position may be prepared, and the table corresponding to the position of the sheet may be selected.

When the position of the sheet can be continuously adjusted, a table corresponding to the reference position of the sheet is prepared, and the applied voltage obtained from the table is corrected based on the position of the sheet. Good (for example, the applied voltage obtained from the table is multiplied by the position of the sheet and the proportionality constant to correct the applied voltage). This provides an effect that the viewing angle of the liquid crystal panel 23 can be adjusted more accurately than in the third and fourth embodiments.

Embodiment 6 FIG. FIG. 8 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 6 of the present invention. In the drawing, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 27 denotes a brightness detection unit (brightness detection means) for detecting the brightness of the liquid crystal panel 23.

Next, the operation will be described. In the first embodiment, the case where the voltage applied to the liquid crystal panel 23 is determined based on the viewing angle of the viewer has been described. However, the brightness of the liquid crystal panel 23 varies depending on the image content (for example, when the background of the television image is night, The brightness differs between a ski area and a daytime ski area).

Therefore, in the sixth embodiment, when the brightness detector 27 detects the brightness of the liquid crystal panel 23, the viewing angle adjuster 17 controls the contrast voltage applied to the liquid crystal panel 23 based on the brightness of the liquid crystal panel 23. And the brightness voltage. Specifically, a table (table indicating the correspondence between the brightness of the liquid crystal panel 23, the contrast voltage, and the brightness voltage) in which the characteristics of the liquid crystal panel 23 are taken into consideration is stored in the memory 19. The CPU 20 reads a contrast voltage and a brightness voltage corresponding to the brightness of the liquid crystal panel 23 from the memory 19, and determines the contrast voltage and the brightness voltage as applied voltages of the liquid crystal panel 23.

As is clear from the above, the sixth embodiment
According to the configuration, since the voltage applied to the liquid crystal panel 23 is determined based on the brightness of the liquid crystal panel 23 detected by the brightness detection unit 27, the same viewing angle is maintained even if the brightness of the image changes. It has an effect that can be done.

Embodiment 7 FIG. FIG. 9 is a configuration diagram showing a viewing angle adjusting device according to Embodiment 7 of the present invention. In the drawing, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 28 denotes an angle detecting unit (angle detecting means) for detecting the mounting angle of the liquid crystal panel 23, and 29 denotes a direction determining unit for determining the scanning direction of the video signal corresponding to the mounting angle of the liquid crystal panel 23 detected by the angle detecting unit 28. (Direction determining unit), 30 is a direction control unit (oscillating unit) for instructing the oscillation of the video signal in the scanning direction determined by the direction determining unit 29.

Next, the operation will be described. In the above-described first to sixth embodiments, the case where the viewing angle of the liquid crystal panel 23 is adjusted has been described. Some people have better visibility when looking in from below than in looking from.

Therefore, in the seventh embodiment, the liquid crystal panel 23 is attached so that the liquid crystal panel 23 can be rotated. For example, when the visibility is not good when the mounting angle is 0 degree (see FIG. 10A), the liquid crystal panel 23 is rotated, the liquid crystal panel 23 is turned upside down, and the mounting angle is changed to 180 degrees. (See FIG. 10B). Thus, even if the posture of the viewer is constant, the viewing angle of the viewer changes (for example, the state changes from a state in which the viewer is looking from above to a state equivalent to a state in which the viewer is looking from below), and the visibility of the liquid crystal panel 23 is increased. Is improved.

However, if the rotation direction of the liquid crystal panel 23 is not changed and the scanning direction of the video signal is not changed, the image on the liquid crystal panel 23 will be upside down. , Direction determination unit 29
Determines the scanning direction of the video signal corresponding to the mounting angle of the liquid crystal panel 23 (in the case of FIG. 10, the scanning direction is reversed (see FIG. 10C)). And the direction control unit 30
When the direction determining unit 29 determines the scanning direction, the liquid crystal driving circuit 22 is instructed in the scanning direction of the video signal so that the video signal is oscillated in the scanning direction. This can prevent the image on the liquid crystal panel 23 from being inverted.

As is apparent from the above, the seventh embodiment
According to the configuration, since the scanning direction of the video signal corresponding to the mounting angle of the liquid crystal panel 23 detected by the angle detecting unit 28 is determined, when the liquid crystal panel 23 is rotated, the image on the liquid crystal panel 23 is inverted. Inconvenience can be avoided, and as a result, an effect is obtained that the liquid crystal panel 23 can be rotated to an angle that matches the viewing angle of the viewer.

Embodiment 8 FIG. In the above-described first to seventh embodiments, an example in which the visibility of the liquid crystal panel 23 is improved has been described. However, the present invention is not limited to this, and can be applied to a display having viewing angle dependence.

[0061]

As described above, according to the present invention, the voltage to be applied to the display is determined based on the viewer's viewing angle detected by the viewing angle detecting means. There is an effect that it can be automatically adjusted according to the visual angle of the person.

According to the present invention, since the voltage applied to the display is determined based on the type of the vehicle detected by the vehicle type detecting means, the optimum viewing angle that matches the viewing angle of the viewer is set. There is an effect that can be.

According to the present invention, since the voltage applied to the display is determined based on the viewer's seat specified by the specifying means, the viewing angle of the display is automatically set according to the viewer's viewing angle. There is an effect that can be adjusted.

According to the present invention, since the voltage applied to the display is determined based on the viewer's seat detected by the seat detecting means, the viewing angle of the display is automatically adjusted according to the viewer's viewing angle. This has the effect of being able to be adjusted dynamically.

According to the present invention, when the seat position of the viewer is adjusted, the voltage applied to the display is determined in consideration of the adjustment result, so that the viewing angle of the display is adjusted with high accuracy. There is an effect that can be.

According to the present invention, since the voltage applied to the display is determined in consideration of the type of image, the same viewing angle can be maintained even if the type of image changes. is there.

According to the present invention, since the voltage applied to the display is determined based on the brightness of the display detected by the brightness detection means, the same viewing angle is maintained even if the brightness of the image changes. There is an effect that can be.

According to the present invention, the voltage applied to the display is determined in consideration of the display temperature, so that the optimum viewing angle can be maintained even if the display temperature changes. There is.

According to the present invention, since the scanning direction of the video signal corresponding to the mounting angle of the display detected by the angle detecting means is determined, when the display is rotated, the image on the display is turned upside down. As a result, the display can be rotated to an angle that matches the viewing angle of the viewer.

According to the present invention, when the viewing angle of the viewer with respect to the display is detected, the voltage applied to the display is determined based on the viewing angle of the viewer. There is an effect that it can be automatically adjusted according to.

According to the present invention, when the type of the vehicle on which the display is mounted is detected, the voltage applied to the display is determined based on the type of the vehicle. Therefore, the optimum voltage matching the viewing angle of the viewer is obtained. There is an effect that the viewing angle can be set.

According to the present invention, when the seat of the viewer is designated, the voltage to be applied to the display is determined based on the seat of the viewer. Therefore, the viewing angle of the display is changed to the viewing angle of the viewer. There is an effect that it can be automatically adjusted according to.

According to the present invention, when the seat of the viewer is detected, the voltage applied to the display is determined based on the seat of the viewer. Therefore, the viewing angle of the display is changed according to the viewing angle of the viewer. There is an effect that can be adjusted automatically.

According to the present invention, when the brightness of the display is detected, the voltage applied to the display is determined based on the brightness of the display.
The same viewing angle can be maintained even when the brightness of an image changes.

According to the present invention, when the mounting angle of the display is detected, the scanning direction of the video signal corresponding to the mounting angle of the display is determined.
When the display is rotated, the inconvenience that the image on the display is inverted can be avoided, and as a result, there is an effect that the display can be rotated to an angle that matches the viewing angle of the viewer.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a viewing angle adjusting device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a viewing angle adjusting method according to the first embodiment of the present invention.

FIG. 3 is a table diagram showing a correspondence relationship between a viewing angle of a viewer, a contrast voltage, and a brightness voltage.

FIG. 4 is a graph showing a correspondence relationship between a temperature of a liquid crystal panel, a contrast voltage, and a brightness voltage.

FIG. 5 is a configuration diagram showing a viewing angle adjusting device according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram showing a viewing angle adjusting device according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram showing a viewing angle adjusting device according to a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram showing a viewing angle adjusting device according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a viewing angle adjusting device according to a seventh embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a relationship between a mounting angle and a scanning direction.

FIG. 11 is a configuration diagram showing a conventional viewing angle adjusting device.

[Explanation of symbols]

14 viewing angle detecting unit (viewing angle detecting unit), 15 image type detecting unit (image type detecting unit), 16 temperature detecting unit (temperature detecting unit), 17 viewing angle adjusting unit (voltage determining unit), 22
Liquid crystal drive circuit (applying means), 23 liquid crystal panel (display), 24 vehicle type detecting section (vehicle type detecting means), 25
Seat designating section (designating means), 26 seat detecting section (seat detecting means), 27 brightness detecting section (brightness detecting means), 28
Angle detector (angle detector), 29 direction determiner (direction determiner), 30 direction controller (oscillator).

Claims (15)

[Claims] 1. A viewing angle detecting means for detecting a viewing angle of a viewer with respect to a display; a voltage determining means for determining a voltage to be applied to a display based on the viewing angle of the viewer detected by the viewing angle detecting means; Means for applying the voltage determined by the means to the display. 2. A vehicle type detecting means for detecting a type of a vehicle equipped with a display; a voltage determining means for determining a voltage to be applied to the display based on the type of the vehicle detected by the vehicle type detecting means; Means for applying the voltage determined by the means to the display. 3. Designating means for designating a seat of the viewer, voltage determining means for determining a voltage to be applied to the display based on the seat of the viewer designated by the designating means,
A viewing angle adjustment device comprising: an application unit configured to apply the voltage determined by the voltage determination unit to a display. 4. A seat detecting means for detecting a seat of a viewer, a voltage determining means for determining a voltage to be applied to a display based on the seat of the viewer detected by the seat detecting means, and the voltage determining means. A viewing angle adjusting device including: an application unit configured to apply the determined voltage to the display. 5. The voltage determining means according to claim 3, wherein when the seat position of the viewer is adjusted, the voltage to be applied to the display is determined in consideration of the adjustment result. Viewing angle adjustment device. 6. The apparatus according to claim 1, further comprising an image type detecting unit for detecting a type of an image displayed on the display, wherein the voltage determining unit determines a voltage to be applied to the display in consideration of the type of the image. The viewing angle adjusting device according to claim 5. 7. A brightness detecting means for detecting the brightness of the display, a voltage determining means for determining a voltage to be applied to the display based on the brightness of the display detected by the brightness detecting means, and the voltage determining means. A viewing angle adjusting device comprising: an application unit for applying the applied voltage to a display. 8. A method according to claim 1, further comprising: temperature detecting means for detecting a temperature of the display, wherein the voltage determining means determines a voltage to be applied to the display in consideration of the temperature of the display. The viewing angle adjustment device according to any one of claims 1 to 7. 9. An angle detecting means for detecting a mounting angle of a display, a direction determining means for determining a scanning direction of a video signal corresponding to the mounting angle of the display detected by the angle detecting means, and the direction determining means. A viewing angle adjusting device comprising: an oscillating unit that oscillates a video signal in the determined scanning direction. 10. A viewing angle adjusting method for detecting a viewer's viewing angle with respect to a display, determining a voltage to be applied to the display based on the viewer's viewing angle, and applying the voltage to the display. 11. A viewing angle adjusting method for detecting a type of a vehicle equipped with a display, determining a voltage to be applied to the display based on the type of the vehicle, and applying the voltage to the display. 12. A viewing angle adjusting method for determining a voltage to be applied to a display based on a seat of a viewer when the viewer's seat is designated, and applying the voltage to the display. 13. A viewing angle adjusting method for detecting a seat of a viewer, determining a voltage to be applied to the display based on the seat of the viewer, and applying the voltage to the display. 14. A viewing angle adjusting method for detecting a brightness of a display, determining a voltage to be applied to the display based on the brightness of the display, and applying the voltage to the display. 15. A viewing angle adjusting method for detecting a mounting angle of a display, determining a scanning direction of a video signal corresponding to the mounting angle of the display, and oscillating the video signal in the scanning direction.