JPH05301543A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH05301543A
JPH05301543A JP10671892A JP10671892A JPH05301543A JP H05301543 A JPH05301543 A JP H05301543A JP 10671892 A JP10671892 A JP 10671892A JP 10671892 A JP10671892 A JP 10671892A JP H05301543 A JPH05301543 A JP H05301543A
Authority
JP
Japan
Prior art keywords
liquid crystal
driver
pixel
light
passenger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10671892A
Other languages
Japanese (ja)
Inventor
Masahisa Miyake
雅久 三宅
Original Assignee
Toshiba Corp
株式会社東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, 株式会社東芝 filed Critical Toshiba Corp
Priority to JP10671892A priority Critical patent/JPH05301543A/en
Publication of JPH05301543A publication Critical patent/JPH05301543A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To cause watching of an image by both a driver and a passenger on the assistant seat side during a stop and to prevent an image from being watched by the driver though the image is watched by the passenger on the assistant seat side during running. CONSTITUTION:During running, though an image signal for television broadcasting is written at a crystal cell 13L on the assistance seat side, nothing is written at a liquid crystal cell 13R on the driver's seat side. Thus, though light 32 from a back light transmits the liquid crystal cell 13L with a numerical aperture responding to an image signal for television broadcasting, the light 32 from the back light does not transmit the liquid crystal cell 13L. A primary color 32L emitted from the slope 16L of a filter 16 is progressed toward the assistant seat side through refraction but no light is progressed to a position within the field of view of a driver on the driver's seat side. This constitution causes watching of an image by both the driver and the passenger on the assistant seat side during a stop and causes watching the image by the passenger on the assistance seat side but prevents the image from being watched by the driver during running.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is provided in a vehicle,
The present invention relates to a liquid crystal display device that provides a driver with various kinds of information by video display, and more particularly, to a liquid crystal display device that enables the driver to stop the video display while traveling.

[0002]

2. Description of the Related Art In recent years, a liquid crystal display device has been installed inside a vehicle such as a passenger car so that a driver can watch a television broadcast.

FIG. 11 is a sectional view showing a liquid crystal panel in such a conventional liquid crystal display device.

In FIG. 11, reference numeral 91 is a liquid crystal panel, and the liquid crystal panel 91 has liquid crystal cells 93 formed at positions corresponding to pixels of a transparent plate member 92. The liquid crystal cell 93 has a structure in which a liquid crystal is inserted between two polarizing plates whose polarization directions are orthogonal to each other, and the aperture ratio can be adjusted by adjusting and applying a voltage to the liquid crystal. .. A color filter 94 is attached at a position corresponding to a pixel on the front side of the liquid crystal panel 91.
A black matrix 95 is formed between the color filters 94 using black metal such as chrome in order to prevent light leakage between pixels.

A backlight is provided on the back side of the liquid crystal panel 91, and light 96 from the backlight is transmitted by the liquid crystal cell 93 at an aperture ratio corresponding to the voltage applied to the liquid crystal and passes through the color filter 94. Is output as primary color light (for example, red light). In this case, the voltage applied to the liquid crystal is generated corresponding to the pixel data, so that the color filter 94 outputs monochromatic light corresponding to the pixel data.

Incidentally, the liquid crystal cell 93 and the color filter 94.
Corresponds to the color display, and is provided with three colors of red, green and blue arranged side by side.

In the liquid crystal display device using such a liquid crystal panel, the screen is small and the viewing angle range is narrow due to the characteristics of the liquid crystal, so that the driver on the driver's side and the passenger on the passenger's side can broadcast television, etc. The most suitable position for arranging so that the can be viewed is at the center of the instrument panel. With the liquid crystal display device arranged in this way, when the car is stopped, both the driver's side and the passenger's side can enjoy the video and audio of the television broadcast, but in this state the car is in a running state or at a certain level. When the speed reaches
In order to avoid the danger caused by the driver being distracted by the screen during driving, only the video display or both the video and audio display are stopped.

Therefore, in such a conventional liquid crystal display device, when a running state or a certain speed is reached, an occupant sitting in the passenger seat cannot view the image.

[0009]

In the above-described conventional vehicle-mounted liquid crystal display device, the image display is stopped in order to prevent the driver in the driver's seat from being distracted by the screen during traveling. However, this makes it impossible for the passenger sitting in the passenger seat to view the image.

The present invention eliminates the above-mentioned problems and allows both the driver and the passenger on the passenger seat side to see the image while the vehicle is stopped and shows the image to the passenger on the passenger side while the vehicle is running. However, it is possible to hide the image from the driver.

[0011]

A liquid crystal display device according to the present invention comprises a liquid crystal panel in which a plurality of liquid crystal cells driven independently of each other constitutes one pixel and a plurality of pixels are arranged. Illuminating means for transmitting light from the back surface of the liquid crystal panel to the liquid crystal cells, drive signal supplying means for giving drive signals for individually controlling aperture ratios of a plurality of liquid crystal cells forming the pixels, and a vehicle. When it is determined that the vehicle is traveling by the traveling state determination means for determining whether or not the vehicle is traveling, and the determination by the traveling state determination means,
The drive signal supply unit is controlled so that the aperture ratio of at least one liquid crystal cell that transmits light in the direction within the driver's field of view in the pixel is lower than that of other liquid crystal cells that form the same pixel. And a control means.

[0012]

According to this structure, the liquid crystal which allows the driving state determining means and the control means to transmit light to the drive signal supplying means in the direction within the driver's field of view within the pixel while the vehicle is running. Since the aperture ratio of at least one of the cells can be controlled to be lower than that of the other liquid crystal cells forming the same pixel, both the driver and the passenger on the passenger side can see the image while the vehicle is stopped. In addition, the image can be made invisible to the driver while the passenger on the passenger seat side can see the image while traveling.

[0013]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 is a sectional view of a liquid crystal panel showing an embodiment of the liquid crystal display device according to the present invention, which is provided inside a vehicle.

In FIG. 1, reference numeral 11 is a liquid crystal panel, and the liquid crystal panel 11 has left and right liquid crystal cells 13L and 13R arranged side by side at positions corresponding to pixels of a transparent plate member 12. The liquid crystal cells 13L and 13R are
It has a structure in which a liquid crystal is inserted between two polarizing plates whose polarization directions are orthogonal to each other. In addition, liquid crystal cells 13L and 13R
Are applied with individually adjusted voltages, and the aperture ratio can be controlled individually. A color filter 14 is attached at a position corresponding to a pixel on the front side of the liquid crystal panel 11. A black matrix 15 made of black metal such as chrome is formed between the color filters 14 in order to prevent light leakage between pixels.

A refraction filter 16 is attached to the front side of the color filter 14 and the black matrix 15. The filter 16 is for causing the light transmitted through the liquid crystal cells 13L and 13R to go into the driver's field of view on the left side in the figure and the passenger's view on the passenger side on the right side in the figure, respectively. The filter 16 is the black matrix 1
5, a rectangular groove is formed in the vertical direction of the screen so that the inclined surfaces 16L and 16R are formed on the left and right sides of the pixel.
Are formed. The inclined surface 16L is formed so as to incline to the left side by about 30 degrees and cover 7/10 of the liquid crystal cell 13L from the left side. The inclined surface 16R is formed so as to incline to the right by about 30 degrees and cover 7/10 of the liquid crystal cell 13L from the right. Between the inclined surfaces 16L and 16 is a parallel surface 16M parallel to the liquid crystal panel 11.

A backlight is provided as a lighting means on the back side of the liquid crystal panel 11, and light from the backlight is transmitted at an aperture ratio corresponding to the voltage applied to the liquid crystal by the liquid crystal cells 13L and 13R, It is output as primary color light (for example, red light) via the color filter 14. In this case, the voltage applied to the liquid crystal is generated corresponding to the pixel data, so that the color filter 14 outputs monochromatic light corresponding to the pixel data.

The liquid crystal cells 13L and 13R and the color filter 14 are provided with three colors of red, green and blue arranged side by side corresponding to color display.

FIG. 2 is a block diagram showing a circuit of the liquid crystal display device of FIG.

In FIG. 2, reference numeral 21 is an input terminal to which the television signal a from the antenna is guided, and the television signal a guided to the input terminal 21 is supplied to the television signal processing circuit 22. The television signal processing circuit 22 creates a video signal b and an audio signal c by performing channel selection, intermediate frequency amplification and detection of the supplied television signal a to generate the video signal processing circuit 23 and the audio signal processing circuit. Supply to 24. The audio signal processing circuit 24 amplifies the audio signal c and outputs it from the speaker.

On the other hand, the vehicle speed detection sensor 25 detects the speed of the vehicle and supplies the vehicle speed detection signal d, which is the detection result, to the video signal output switching circuit 26. The side brake operation detection circuit 27 detects whether or not the side brake is applied, and supplies the side brake operation signal e of the detection result to the video signal output switching circuit 26. The video signal output switching circuit 26 determines whether the vehicle is traveling from the vehicle speed detection signal d and the side brake actuation signal e.
Based on this determination result, the video signal output switching signal f is created and supplied to the video signal processing circuit 23.

The video signal processing circuit 23 is based on the judgment result of the video signal processing circuit 23, and the liquid crystal cells 13L, 1L of FIG.
The liquid crystal panel unit 30 in which a plurality of 3R pixels are arranged is driven. The video signal processing circuit 23 creates a video signal in which the polarity is inverted every horizontal period and every field from a polarity inversion signal g from an inversion signal generation circuit 27 and a video signal b from the television signal processing circuit 22 described later. However, when the video signal output switching signal f does not indicate output switching, the video signal whose polarity is inverted is directly used for the first and second video signals.
The video signals hL and hR are supplied from the first and second output terminals to the liquid crystal panel unit 30. When the video signal output switching signal f indicates output switching, the video signal processing circuit 23 outputs the video signal whose polarity is inverted as it is from the first output terminal as the first video signal hL.
The polarity inversion signal g from the inversion signal generation circuit 27 is used as the second video signal hL from the second output terminal to the liquid crystal panel section 30.
Supply to. Further, the video signal processing circuit 23 supplies the polarity inversion signal g from the inversion signal generation circuit 27 to the liquid crystal panel section 30 as the first and second common electrode drive signals gL and gR from the third and fourth output terminals. To do.

The liquid crystal panel section 30 supplies the horizontal and vertical synchronizing signals i in the video signal hL to the inversion signal generating circuit 27. The inversion signal generation circuit 27 creates a polarity inversion signal g in which the polarity is inverted for each horizontal period and each field from the horizontal and vertical synchronization signals i, and supplies the polarity inversion signal g to the video signal processing circuit 23 and the frame detection circuit 28. Frame detection circuit 28
By performing frame detection of the polarity inversion signal g,
A polarity inversion signal j whose polarity is inverted for each field is created and supplied to the liquid crystal panel unit 30.

The liquid crystal panel section 30 has a common electrode drive signal g.
The common electrode is inverted and driven based on L and gR, the address wiring output is inverted based on the polarity inversion signal j, and the video signals hL and hR whose polarities are inverted are written in the liquid crystal.

A backlight 31 is provided on the back side of the liquid crystal panel section 30, and light 32 from the backlight 31 passes through the liquid crystal panel section 30 to display an image. There is.

FIG. 3 is a block diagram showing an equivalent circuit of the liquid crystal panel section of FIG.

In FIG. 3, the liquid crystal panel section 30 includes thin film transistors (hereinafter referred to as TFTs) 52L and 52R.
The active matrix method using is used.

Video signals hL and hR from the video signal processing circuit 23 are guided to the input terminals 41 and 42, respectively. Video signals hL and hR guided to the input terminals 41 and 42
Are supplied to the hold circuits 43 and 44, respectively.

The frame detection circuit 28 is connected to the input terminal 45.
The polarity inversion signal j from is derived. The polarity inversion signal j guided to the input terminal 45 is supplied to the scanning circuits 47 and 48, respectively.

The hold circuit 43 creates video signals for a plurality of pixels based on the video signal hL and outputs the video signals from the data wiring. Further, the hold circuit 43 separates the horizontal and vertical synchronizing signals from the video signal hL, supplies the horizontal and vertical synchronizing signals to the scanning circuit 47, and leads them to the output terminal 46. The horizontal and vertical synchronizing signals i led to the output terminal 46 are supplied to the inverted signal generating circuit 27 shown in FIG.

The scanning circuit 47 creates ON signals of a plurality of signal lines 49, 49 ... Inverted for each field based on the horizontal and vertical synchronizing signals i and the polarity inversion signal j, and outputs the ON signals from the address wiring. It has become.

The hold circuit 44 creates video signals of a plurality of pixels based on the video signal hR and outputs the video signals from the data wiring, and separates the horizontal and vertical sync signals as the horizontal and vertical sync signals k, and the scanning circuit 47. Supply to.

The scanning circuit 48 generates ON signals of a plurality of signal lines 50, 50 ... Inverted for each field based on the horizontal and vertical synchronizing signals k and the polarity inversion signal j, and outputs the ON signals from the address wiring. It has become.

The liquid crystal cell 13L on the passenger side in one pixel (for example, the pixel D1) has a TFT 52L and a pixel electrode 55L.
And a liquid crystal (not shown). Hold circuit 4
3 is a pixel D1 in the horizontal direction from the input video signal hL,
The video signal of D2 ... Is sampled and sampled, and the video signals of the plurality of sampled pixels D1, D2 ... Are held for one horizontal scanning period based on the horizontal and vertical synchronizing signals, and are respectively output from the data lines XL1, XL2. Output.

The scanning circuit 47 has a horizontal and vertical synchronizing signal i.
On the basis of the above, in accordance with the output timing from the hold circuit 43, ON signals are sequentially output from the address lines YL1, YL2 ... To the gates G of the TFTs 52L, 52L ... Of the signal lines 49, 49. To do.

The data wirings XL1, XL2, ... Are respectively composed of the first to 480th pixels D1, D2 ,.
Are directly connected to the drains D of the TFTs 52L, 52L.

The address wirings YL1, YL2 ... Are respectively the first to 220th signal lines 49, 49 ...
Are directly connected to the gate G of the TFTs 52L, 52L.

The TFTs 52L, 52L ... Supply signals from the address wiring of the hold circuit 43 to the pixel electrodes 55L, 55L ... When the gate G is on. The pixel electrode 55L is composed of a display electrode 56L, a counter electrode 57L and a liquid crystal not shown. Source S of TFT 52L, 52L ...
Is connected to the common electrode drive signal input terminal 58L via the display electrode 56L and the counter electrode 57L, and
It is connected to a reference potential point via a capacitor CL1 which is a liquid crystal capacitance. Common electrode drive signal input terminal 5
The common electrode drive signal gL for inversion drive is supplied from the video signal processing circuit 23 to 8L.

The liquid crystal cell 13R on the driver side in one pixel (for example, the pixel D1) includes a TFT 52R and a pixel electrode 55R.
And a liquid crystal (not shown). More specifically, the hold circuit 44 controls the input video signal hR
The video signals of horizontal pixels D1, D2, ... Are sampled and sampled, and the plurality of sampled pixels D are extracted.
The video signals of 1, D2 ... Are held for one horizontal scanning period based on the horizontal and vertical synchronizing signals, and the data lines XR1
, XR2 ...

The data wirings XR1, XR2, ... Are respectively the first to 480th TFTs 52R, 5 in the row direction.
It is directly connected to the drain D of 2R.

The scanning circuit 48 uses the horizontal and vertical sync signals k.
On the basis of the above, in accordance with the timing of the output from the hold circuit 44, ON signals are sequentially output from the address lines YR1, YR2, ... To the gates G of the TFTs 52R, 52R. To do.

The TFTs 52R, 52R ... 52R are gates G
When is on, the signal from the address wiring of the hold circuit 44 is supplied to the pixel electrodes 55R, 55R ... Pixel electrode 55
R is composed of a display electrode 56R, a counter electrode 57R and a liquid crystal not shown. Sources S of the TFTs 52R, 52R ... Are connected to a common electrode drive signal input terminal 58R via a display electrode 56R and a counter electrode 57R, and are also connected to a reference potential point via a capacitor CR1 which is a liquid crystal capacitance. ing. The common electrode drive signal gR is supplied to the common electrode drive signal input terminal 58R.

Writing of pixels in the signal line 49 of the first row in the odd field of the liquid crystal display panel section in this case will be described.

The hold circuit 43 extracts the video signals to be displayed in the horizontal pixels D1, D2 ... From the input video signals hL and samples them. The sampled video signals of the pixels D1, D2 ... Are held for one horizontal scanning period, and the data lines XL1, XL are respectively held.
2 Output from ... On the other hand, all the TFTs 52L, 52L ... 52L in the first row are turned on by the high level "H" from the address wiring YL1 of the scanning circuit 47, that is, the selection level signal, and the signal input to the pixels on the signal line 49 in the first row. (Write) is on. Further, the common electrode drive signal gL from the common electrode drive signal input terminal 58L applied to the counter electrode 57L becomes high level. As a result, the signal voltage from the data lines XL1, XL2 ...
The liquid crystal capacitance (capacitor CL) is transmitted to the display electrodes 56L, 56L, ... Of the first row through the TFTs 52L, 52L ,.
The charge corresponding to the signal voltage is stored in 1). When the writing of the pixels of the first row is completed and the writing of the pixels of the second row is started, the potential from the address wiring YL1 of the scanning circuit 47 becomes the low level "L", that is, the non-selection level, and all the TFTs 52L, 52L. ... is turned off. The signal charge accumulated in the capacitor CL1 by this operation continues to be applied to the liquid crystal until the next writing is performed. Thereby, the pixel electrodes 55L and 55L of the liquid crystal cell 13L in the first row are
The video signal is displayed in L ... Until the next writing.

After the writing of the signal line 11 of the first row is completed,
The hold circuit 43 inverts and extracts the video signal for displaying in the horizontal pixels D1, D2 ... From the video signal hL of the second horizontal scanning period, samples, holds for one horizontal scanning period. , Each data wiring X1,
Output from X2. On the other hand, the TFTs 52L, 5 in the second row
2L ... Are turned on by a low level signal from the address wiring YL2 of the scanning circuit 47. Further, the common electrode drive signal gL applied to the counter electrode 57L becomes low level. As a result, the signal voltages from the data lines XL1, XL2 ...
56L through L to be transmitted to the display electrodes 56L, 56L ... 56L, and a charge corresponding to a signal voltage is accumulated in the liquid crystal capacitance (capacitor CL1). As a result, the pixel electrodes 55L, 55L ... 55L of the liquid crystal cell 13L in the second row display the video signal until the next writing is performed.

After the writing of the pixels on the signal line 49 of the second row is completed, the display pixels of the odd-numbered rows are written in the same manner as the first row, and the display pixels of the even-numbered rows are the same as the second row. Is written. After the writing of the odd field is completed, in the even field, the signals from the data lines XL1, XL2 ..., The address lines YL1, L2 ... And the common electrode drive signal gL from the common electrode drive signal input terminal 58L are inverted.

The signal line 50 of the liquid crystal display panel section in this case is also written with the video signal hR by the hold circuit 44 and the operation circuit 48 as in the case of the signal line 49.

FIG. 4 is a waveform diagram for explaining the operation of such an embodiment. FIG. 4 (a) shows the common electrode drive signal gR, FIG. 4 (b) shows the video signal hR, and FIG. 4C shows the common electrode drive signal gL, and FIG. 4D shows the video signal hL.
Is shown.

In FIG. 4A, the common electrode drive signal gR on the driver side is inverted every horizontal synchronization period (1H). On the other hand, as shown in FIG. 4B, the video signal hR on the driver's seat side becomes a video signal of a television broadcast that is inverted every 1H while the vehicle is stopped, and becomes the same as the common electrode signal gR during traveling. On the other hand, the common electrode drive signal gL on the passenger seat side is the same as the common electrode drive signal gR as shown in FIG. As shown in FIG. 4D, the image signal hR on the passenger seat side is an image signal that is inverted every horizontal synchronization period both while the vehicle is stopped and when the vehicle is running.

Liquid crystal cell 13R on the driver side of the liquid crystal panel
The driver side image signal hR and the common electrode drive signal gR.
Since the difference is written, the video signal of the television broadcast is written while the vehicle is stopped, and nothing is written while the vehicle is running. Since the difference between the image signal hL on the passenger side and the common electrode drive signal gL is written in the liquid crystal cell 13L on the passenger side, a television broadcast image signal is written while the vehicle is stopped or running.

FIGS. 5 and 6 are explanatory views for explaining the operation of such an embodiment. FIG. 5 shows that the vehicle is stopped and FIG. 6 shows that the vehicle is running.

In FIG. 5, the liquid crystal panel 1 is displayed while the vehicle is stopped.
Video signals of the same television broadcast are written in the liquid crystal cells 13L and 13R on the passenger side and the driver side. The light 32 from the backlight passes through the liquid crystal cells 13L and 13R at an aperture ratio corresponding to a video signal of television broadcasting,
The primary color lights 32L and 32R are incident on the filter 16 via the color filter 14. The primary color light 32L emitted from the inclined surface 16L of the filter 16 is refracted toward the passenger seat side, and the primary color lights 32L and 32R emitted from the parallel surface 16M of the filter 16 are directed toward the front side of the screen.
The primary color light 32R emitted from the inclined surface 16R of No. 6 is refracted and directed toward the direction within the visual field of the driver on the driver's seat side. As a result, the television broadcast image can be viewed on both the passenger side and the driver side.

In FIG. 6, while traveling, the liquid crystal panel 1
Although the video signal of the television broadcast is written in the liquid crystal cell 13L on the passenger side of No. 1, nothing is written in the liquid crystal cell 13R on the driver side of the liquid crystal panel 11. This allows
The light 32 from the backlight passes through the liquid crystal cell 13L at an aperture ratio corresponding to the video signal of the television broadcast, and enters the filter 16 as the primary color light 32L via the color filter 14, but from the backlight. The light 32 is hardly transmitted because the aperture ratio of the liquid crystal cell 13R becomes substantially zero.
32 L of primary color light emitted from the inclined surface 16 L of the filter 16
Is directed to the passenger side by refraction, and the primary color light 32L emitted from the parallel surface 16M of the filter 16 is directed to the front side of the screen, but almost no light is emitted from the inclined surface 16R of the filter 16. As a result, the passenger on the passenger side can see the image of the television broadcast, but the driver cannot see the image of the television broadcast.

According to such an embodiment, the television broadcast image can be seen from both the driver's seat side and the passenger's seat side while the vehicle is stopped, but while the vehicle is running, the television on the passenger's seat side can be seen. You can see the video of the broadcast, but the driver cannot see the video of the television broadcast. As a result, the driver on the driver's side can watch the television broadcast while the driver on the driver's side is not distracted by the screen while traveling. Also, in this embodiment, the inclined surface 16 of the filter 16 is
The refraction of the primary color lights 32L and 32R by the L and 16Rs also has an effect of expanding the viewing angle range while the vehicle is stopped.

In the embodiment shown in FIG. 1, the primary color light 32L emitted from the parallel surface 16M of the filter 16 may be directed to the driver's seat side to some extent. It can be solved by installing on.

FIG. 7 is a sectional view of a liquid crystal panel showing another embodiment of the liquid crystal display device according to the present invention.

In FIG. 7, the liquid crystal panel 11 is shown in FIG.
It is similar to the embodiment of. The difference in this embodiment is that the refraction filter 61 is composed of two layers of filters 62 having different refraction indexes.
It is formed by 63.

A filter 62 is attached to the front side of the color filter 14 and the black matrix 15.
In the filter 62, rectangular grooves having different inclination angles on the left and right in the vertical direction of the screen with the black matrix 15 as the apex are formed without leaving parallel surfaces, so that different inclined surfaces 62L and 62R are formed on the left side and the right side of the pixel. ing. The inclined surface 62L is formed so as to be inclined to the left side by about 20 degrees and covers the liquid crystal cell 13L and 2/10 of the liquid crystal cell 13L from the left side. The inclined surface 62R is formed so as to incline to the right side by about 30 degrees and cover 8/10 of the liquid crystal cell 13R from the right side. The back side of the filter 63 matches the front side of the filter 62, and the front side is a flat surface.

The operation of such an embodiment will be described. While the vehicle is stopped, the light 64 from the backlight is emitted from the liquid crystal cell 13.
L and 13R are transmitted with an aperture ratio corresponding to the video signal of the television broadcast, and the primary color light 6 is transmitted through the color filter 14.
The light enters the filter 62 as 4L and 64R. The primary color lights 64L and 64 emitted from the inclined surface 62L of the filter 62
The R goes toward the passenger seat side by the two-step refraction through the filter 63, and the primary color light 64R emitted from the inclined surface 62R of the filter 62 goes toward the driver seat side by the two-step refraction through the filter 63. As a result, the television broadcast image can be viewed on both the passenger side and the driver side.

While traveling, the light 64 from the backlight is transmitted through the liquid crystal cell 13L at an aperture ratio corresponding to the video signal of the television broadcast, and is converted into the primary color light 64L by the filter 62.
Incident on. However, since the light 64 from the backlight does not pass through the liquid crystal cell 13R, the light does not go to the driver's seat side.

According to this embodiment, the same effect as that of the embodiment of FIG. 1 is obtained, and the liquid crystal cell 13 on the driver's seat side is provided.
When the R image is switched, the brightness of the image on the passenger side is reduced, but the light is not directed to the front side, and the light is not wasted.

FIG. 8 is a sectional view of a liquid crystal panel showing another embodiment of the liquid crystal display device according to the present invention.

In FIG. 8, reference numeral 71 is a liquid crystal panel, and the liquid crystal panel 71 has left and right liquid crystal cells 73L, 7 of different lengths at positions corresponding to pixels of the transparent plate member 72.
3Rs are formed side by side. That is, the liquid crystal cell 73
L is formed to be longer than the liquid crystal cell 73R in the lateral direction, and the opening area at the maximum opening is larger than that of the liquid crystal cell 73R. The liquid crystal cells 73L and 73R have a structure in which a liquid crystal is inserted between two polarizing plates whose polarization directions are orthogonal to each other.
The structure is such that the liquid crystal cells 73L and 7L are rotated by 0 degrees.
The polarization directions of the lights emitted from 3R are orthogonal to each other.

The filter 76 has a polarizing plate 78 having the same polarization direction as the light emitted from the liquid crystal cell 73R on the inclined surface 77L and the parallel surface 77M of the filter 77 similar to the filter 16 of FIG.
L and 78M are provided, and a polarizing plate 78 having the same polarization direction as the light emitted from the liquid crystal cell 73R on the inclined surface 77R of the filter 77.
R is provided.

According to such an embodiment, the same effect as the embodiment of FIG. 1 is obtained, and the monochromatic light 79L emitted from the liquid crystal cell 73L is passed to the front passenger side and the front passenger side by the polarizing plates 78L and 78M. The light emitted from the liquid crystal cell 73R appears only on the driver's seat side by the polarizing plate 77R. As a result, the image of the television broadcast emitted from the liquid crystal cell 73R can be completely prevented from reaching the driver's seat side during traveling. Further, since the liquid crystal cell 73L is formed to be longer than the liquid crystal cell 73R in the lateral direction, the images of the passenger seat and the front side do not change even when the images of the liquid crystal cell 73 on the driver side are switched.

FIG. 9 is a constitutional view of an equivalent circuit of a liquid crystal panel showing still another embodiment of the liquid crystal display device according to the present invention.

In the embodiment shown in FIG. 9, one pixel 101 is divided into six and divided into six.
Two liquid crystal cells 111, 112, 113, 114, 11
5, 116, and liquid crystal cells 111, 112, 113, 1
14, 115 and 116 are individually controlled by the hold circuit 103 and the scanning circuit 104.

The hold circuit 103 is based on the supplied video signal, and the liquid crystal cells 111, 112, 113, 114,
Separate video signals are created for 115 and 116 and output from the data wiring.

The scanning circuit 104 uses the horizontal and vertical synchronization signals and the frame detection signal to generate liquid crystal cells 111, 112, 1
The ON signals of 13, 114, 115 and 116 are created and output from the address wiring.

Liquid crystal cells 111, 112, 113, 11
4, 115 and 116 are the liquid crystal cells 13L and 13R of FIG.
Similarly, the TFT 122, the pixel electrode 125, and a liquid crystal (not shown) are included. The capacitor C1 is a liquid crystal capacitance, and the common electrode drive signal input terminal 131 is supplied with the common electrode drive signal.

Although not shown in the figure, the liquid crystal panel is formed with 220 such pixels 101 in the vertical direction and 480 in the horizontal direction.

FIG. 10 is an explanatory view of the liquid crystal cell of FIG.

In FIG. 10, liquid crystal cells 111 and 11
116 are formed in a regular hexagonal shape, and two liquid crystal cells 111, 112, ... 116 are arranged in a regular hexagonal shape to form one pixel 101. 6
On the front side of each of the liquid crystal cells 111, 112, ...
Light from the six liquid crystals 111, 112, ... 116 goes in different directions. With respect to this direction, for example, when the liquid crystal display device is placed in front of the ceiling of the vehicle, the light from the liquid crystal cell 111 is directed toward the driver's seat side and the liquid crystal cell 11
The light from 2 is transmitted to the passenger side of the liquid crystal cell 113, 114, 11
The lights from 5, 116 are set so as to travel in four directions on the rear seat side. In this state, no image is displayed on the liquid crystal cell 111 while the vehicle is traveling. As a result, the same effect as the embodiment of FIG. 1 can be obtained. In addition, the remaining liquid crystal cells 112, 113, 114, 115, 116
By not displaying the video individually by key input, etc., if there is a passenger in the passenger seat or rear seat who does not want to watch TV broadcasting, do not display the video to that passenger be able to.

[0074]

According to the present invention, the image is shown to both the driver and the passenger on the passenger's side while the vehicle is stopped, and the image is shown to the passenger on the passenger's side while the vehicle is running. Since it can be hidden from the passenger, the driver on the driver's seat side is not distracted by the screen while the driver is running, and the passenger on the passenger's seat side can watch the video such as television broadcasting.

[Brief description of drawings]

FIG. 1 is a sectional view of a liquid crystal panel showing an embodiment of a liquid crystal display device according to the present invention.

FIG. 2 is a block diagram showing a circuit of the liquid crystal display device of FIG.

FIG. 3 is a configuration diagram showing an equivalent circuit of the liquid crystal panel unit of FIG.

FIG. 4 is a waveform diagram illustrating the operation of the embodiment of FIG.

FIG. 5 is an explanatory diagram for explaining the operation of the embodiment of FIG. 1 during a vehicle stop.

FIG. 6 is an explanatory view illustrating an operation during traveling of the embodiment of FIG.

FIG. 7 is a sectional view of a liquid crystal panel showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 8 is a sectional view of a liquid crystal panel showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 9 is a configuration diagram of an equivalent circuit of a liquid crystal panel showing still another embodiment of the liquid crystal display device according to the present invention.

10 is an explanatory diagram of the liquid crystal cell of FIG.

FIG. 11 is a cross-sectional view showing a liquid crystal panel in a conventional liquid crystal display device.

[Explanation of symbols]

 11 Liquid crystal panel 13L, 13R Liquid crystal cell 16 Filter

Claims (3)

[Claims]
1. A liquid crystal panel in which a plurality of liquid crystal cells that are driven independently of each other constitute one pixel, and a plurality of pixels are arranged, and light is emitted from the rear surface of the liquid crystal panel to the liquid crystal cell. Illuminating means for transmitting the light, driving signal supplying means for giving a driving signal for individually controlling the aperture ratios of the plurality of liquid crystal cells forming the pixel, and traveling state determination for determining whether or not the vehicle is traveling And the driving state determination means, when it is determined that the vehicle is traveling, the aperture ratio of at least one of the liquid crystal cells that transmits light in the direction of the driver's view within the pixel is the same. A liquid crystal display device, comprising: a control unit that controls the drive signal supply unit to be lower than the other liquid crystal cells that form the pixel.
2. The liquid crystal display device according to claim 1, further comprising an optical filter that guides light passing through a liquid crystal cell forming the pixel in individual directions.
3. The liquid crystal display device according to claim 1, wherein at least one of the plurality of liquid crystal cells forming the pixel has an opening area different from that of the other liquid crystal cells at the maximum opening.
JP10671892A 1992-04-24 1992-04-24 Liquid crystal display device Pending JPH05301543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10671892A JPH05301543A (en) 1992-04-24 1992-04-24 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10671892A JPH05301543A (en) 1992-04-24 1992-04-24 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH05301543A true JPH05301543A (en) 1993-11-16

Family

ID=14440738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10671892A Pending JPH05301543A (en) 1992-04-24 1992-04-24 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPH05301543A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007595A1 (en) * 1996-08-20 1998-02-26 Grundig Ag Process and device for modifying the function of a mobile apparatus
WO2006061971A1 (en) * 2004-12-06 2006-06-15 Fujitsu Ten Limited Display device
JP2006248513A (en) * 2006-02-23 2006-09-21 Fujitsu Ten Ltd Display device and display device for vehicle
JP2007139904A (en) * 2005-11-15 2007-06-07 Nec Corp Display element and display device equipped therewith
JP2009181097A (en) * 2008-02-01 2009-08-13 Nec Electronics Corp Multi-domain display device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007595A1 (en) * 1996-08-20 1998-02-26 Grundig Ag Process and device for modifying the function of a mobile apparatus
WO2006061971A1 (en) * 2004-12-06 2006-06-15 Fujitsu Ten Limited Display device
JP2006189782A (en) * 2004-12-06 2006-07-20 Fujitsu Ten Ltd Display device
JP2007139904A (en) * 2005-11-15 2007-06-07 Nec Corp Display element and display device equipped therewith
JP2006248513A (en) * 2006-02-23 2006-09-21 Fujitsu Ten Ltd Display device and display device for vehicle
JP4597069B2 (en) * 2006-02-23 2010-12-15 富士通テン株式会社 Display device and in-vehicle display device
JP2009181097A (en) * 2008-02-01 2009-08-13 Nec Electronics Corp Multi-domain display device

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