JPH08152619A - Liquid crystal display device and electronic equipment - Google Patents

Abstract

PURPOSE: To make a both-surface display without requiring mechanical structure or an optical panel by dividing each display unit area, and providing some divided areas with a light reflection part on the reverse surface side and the remaining areas with a light reflection part on the top surface side. CONSTITUTION: The reflection plates 3 and 4 are provided on the top and reverse surface sides of the display unit area 1, and the reflection plate 3 on the top surface side constitutes a white reflection surface 3a formed at the hatched lower half and a transmission surface 3b for transmitting light at the upper half. The reflection plate 4 on the reverse surface side, on the other hand, constitutes a white reflection surface 4a at the hatched upper half and a transmission surface 4b for transmitting light at the lower half. The display unit area 1 emits light A, reflected by the reflection surface 4a on the reverse surface side, to the top surface side through the upper part of a liquid crystal layer 2 and the transmission surface 3b when the liquid crystal layer 2 is in a light transmission state. The light reflected by the reflection surface 3a on the top surface side is emitted to the reverse surface side through the lower part of the liquid crystal layer 2 and the transmission surface 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device in which a display can be seen from both the front surface side and the back surface side, and an electronic apparatus equipped with the liquid crystal display device.

[0002]

2. Description of the Related Art A liquid crystal display device has electrodes formed on both sides of a liquid crystal layer, and a display state such as light transmission or non-transmission of the liquid crystal layer is changed to a dot region or a segment by a voltage applied between these electrodes. The display is performed by changing each area. Therefore, the electrodes on both sides of these liquid crystal layers are I
If the liquid crystal display device is formed of a transparent electrode made of TO ([Indium Tin Oxide]) or the like, the liquid crystal display device is capable of double-sided display in which the display can be seen from both the front surface side and the back surface side. .

However, if the light from the outside is directly transmitted as described above, the display becomes difficult to see unless the background is relatively bright and close to a solid state. Therefore, in an actual liquid crystal display device, a reflection plate is provided on the back surface side. Or a backlight is provided. For this reason, in a normal liquid crystal display device, the display cannot be seen from the back surface side because it is blocked by the reflection plate and the backlight, and a single-sided display is performed.

On the other hand, Japanese Patent Laid-Open No. 5-150233 discloses a liquid crystal display panel in which a reflecting plate is movable, so that a liquid crystal display can be displayed in accordance with the open / closed state of an operation lid incorporating the liquid crystal display panel. There have been described some of those which can be viewed from both the panel front surface side and the panel back surface side.

As one of them (first conventional example), there is one in which a sheet-shaped reflecting plate can be moved between a front surface side and a back surface side of a liquid crystal display device via a roller. In this example,
By interlocking with the opening / closing mechanism of the operation lid, when the operation lid is closed, the reflecting plate is moved to the back side, and when the operation lid is opened, the reflecting plate is moved to the front side, The double-sided display is realized by always arranging the sheet-like reflector behind the display side of the liquid crystal display device.

As another example (second conventional example), a large number of small piece-like reflectors that can be opened and closed are arranged on the front surface side and the back surface side of the liquid crystal display panel, and are linked to the opening / closing mechanism of the operation lid. , A double-sided display is realized by always opening the reflector on the side of viewing the display of the liquid crystal display panel and closing the reflector on the back side.

Further, in the above publication, optical panels using liquid crystal or the like whose entire panel surface is electrically switched between a light transmitting state and a light scattering or non-light transmitting state are arranged on the front surface side and the back surface side of a liquid crystal display device. The double-sided display is realized by interlocking with the opening / closing mechanism of the operation lid so that the optical panel on the side that always sees the display is in the light transmission state and the optical panel on the back side is in the light scattering or non-transmission state ( 3).

[0008]

However, in the above-mentioned first and second conventional examples, since the reflecting plate is mechanically moved or opened / closed, a complicated mechanical structure is required, and downsizing of the device is required. There is a problem that it becomes difficult and the cost of the product increases. Moreover, when changing the specifications of the conventional equipment from single-sided display to double-sided display, if such a complicated mechanical structure had to be added, a drastic design change would be necessary, and in reality there is no choice but to make a new design.
There was also the problem that it was difficult to add functions in the form of minor changes to existing products.

In the first conventional example, the reflector moves mechanically in conjunction with the opening and closing of the operation lid, so a certain amount of force is required to open and close the operation lid, and this is especially the case for equipment. When it is small, there is a problem that operability deteriorates. Further, in the second conventional example, when the operation lid is closed, the small-piece-shaped reflector plate arranged on the operation lid is opened and protrudes forward, which causes a problem that portability of the device is impaired. It was

Further, in the third conventional example, since it is necessary to provide optical panels made of liquid crystal or the like on both the front surface side and the back surface side of the liquid crystal display panel, not only the cost of the product is increased but also the device There is a problem that it is difficult to reduce the thickness.

Moreover, in all of the above-mentioned conventional examples, when the operation lid is opened, it is necessary to invert the display of the liquid crystal display device through a mirror provided in the main body of the device, and the display becomes difficult to see. There was also.

The present invention has been made to solve the above-mentioned conventional problems, and does not require a mechanical structure for making the reflector movable, or an optical panel made of liquid crystal or the like, It is an object of the present invention to provide a liquid crystal display device which can realize a display and an electronic device including the liquid crystal display device.

[0013]

In a liquid crystal display device according to the present invention (claim 1), transparent electrodes are arranged on both surfaces of a liquid crystal layer, and a voltage applied between the transparent electrodes on both surfaces of the liquid crystal layer causes A liquid crystal display device that changes a display state for each display unit area, wherein each display unit area is divided into two or more areas, and a light reflecting portion is provided on a back surface side in a part of the divided areas. The remaining area thus divided is provided with a light-reflecting portion on the front surface side, whereby the above object is achieved.

A liquid crystal display device according to the present invention (claim 2) is a liquid crystal display device for displaying numbers by 7 segments, and a 7-segment normal image and a mirror image are superposed on at least one surface of a liquid crystal layer. 7 in common segment shape
One transparent electrode is provided, and each display unit area formed in the liquid crystal layer by each of the seven transparent electrodes of the common segment shape corresponds to a first area corresponding to only a normal image segment and only a mirror image segment. The second region and the third region in which the normal image segment and the mirror image segment overlap each other are divided into three parts, and the first region is provided with a light reflecting portion on the back surface side.
In the area (1), a light reflecting portion is provided on the front surface side, the third area of each display unit area is divided into two or more areas, and a light reflecting portion is provided on the back surface side in some of the divided areas. The light-reflecting portion is provided on the surface side in the divided remaining area, and the above-mentioned object is achieved by this.

According to the present invention (claim 3), in each of the display unit areas, the light reflecting portions on the front surface side and the back surface side are viewed from the direction of the line of sight expected from the structure of the present liquid crystal display device. In this case, the light transmission portion on the front surface side and the light reflection portion on the back surface side are overlapped with each other, and the light reflection portion on the front surface side and the light transmission portion on the back surface side are overlapped with each other.

An electronic device according to the present invention (claim 4) is
The liquid crystal display device is attached to a device body so as to be openable and closable, and an open / close detecting means for detecting an open / closed state of the liquid crystal display device, a drive circuit for displaying the liquid crystal display device, And a display inversion circuit for inverting the display of the liquid crystal display device by the drive circuit when the open / close detection means detects one of the open / closed states, thereby achieving the above object. It

According to a fifth aspect of the present invention, in the electronic device, the open / close state is detected by the open / close detecting means.
It has a drive voltage adjusting means for adjusting the drive voltage of the drive circuit.

According to a sixth aspect of the present invention, in the electronic device, the drive circuit and the display inversion circuit are integrally provided in a unit of the liquid crystal display device.

[0019]

The display state of the liquid crystal layer includes not only the change from the light transmitting state to the light non-transmitting state or the light scattering state but also the case where the color density or hue changes. In addition, TN [Twisted Nemati
c] A liquid crystal or the like requires a polarizer to change these states. The display unit area is an area in the liquid crystal layer in which this display state always changes integrally. In the case of display by the dot matrix method, each dot portion becomes this display unit area, and in the case of display by the segment method. Each segment portion becomes this display unit area.

According to the first aspect of the present invention, each dot, segment or the like is divided, one side is provided with the light reflecting portion on the back surface side, and the other is provided with the light reflecting portion on the front surface side. Therefore, the light incident from the surface side of the liquid crystal display device is
After being reflected by the light reflecting portion on the back surface and returning to the front surface through a part of each dot, segment, etc., the display can be viewed from the front surface by this reflected light. Further, the light incident from the back surface side of the liquid crystal display device is reflected by the light reflecting portion on the front surface side, and then returns to the back surface side through the rest of each dot, segment, or the like. Can be seen.

Moreover, the light-reflecting portions on the front surface side and the back surface side can be provided by, for example, patterning a thin film on each of the front and back substrates sandwiching the liquid crystal layer. It is possible to form the liquid crystal display device with the same shape and size.

As a result, according to the first aspect of the invention, it is possible to realize the reflective double-sided display without adding a mechanical structure for moving the reflector to the liquid crystal display device or an optical panel. .

However, a part of the reflected light seen from the front side of the liquid crystal display device is masked by the light reflecting portion on the front side, and a part of the reflected light seen from the back side is also reflected by the light reflecting portion on the back side. Is masked, so each dot, segment, etc.
The display will be performed using only a part of the range. Therefore, particularly when dividing a segment, both of the divided regions must maintain the characteristics of the original segment shape. On the other hand, the dot division may be performed by simply dividing each dot into two vertically or horizontally. However, even in the case of such dots, in consideration of the continuity with the surrounding dots at the time of display, it may be divided into two by another method or further into three or more.

When the liquid crystal display device is a double-sided display, the display viewed from the back side is a mirror image of the display on the front side. For this reason, particularly in the case of the segment system in which the font is tilted for display, the tilt direction of the font is reversed on the back side, and the display looks unnatural.

The invention of claim 2 is to prevent such an unnatural display in a 7-segment liquid crystal display device displaying italicized numbers. That is, each display unit area has a shape in which a 7-segment normal image and a mirror image are superposed, and when this display unit area is viewed from the front surface side, only the mirror image segment area is completely covered by the light reflection portion on the front surface side. By obtaining the reflected light in the shape of the segment of the normal image by masking to the back side, when viewing from the back side, the area of only the segment of the normal image is completely masked by the light reflecting part on the back side to obtain a mirror image. The reflected light in the shape of the segment is obtained. Therefore, by utilizing the property that the light-reflecting portion on the front surface side serves as a mask when viewed from the front surface side and the light-reflecting portion on the back surface side functions as a mask when viewed from the back surface side, one of these front and back fonts is used. By masking the parts with each other,
You can match the inclination of the numbers on the front and back.

As a result, according to the second aspect of the invention, even when the italicized numbers of the 7-segment display are viewed from the back side,
The inclination of these numbers is not reversed, and the inclination can be made in the same direction as seen from the front side. The invention of claim 2 is a device devised in a way of dividing each display unit area, and is completely included in the invention of claim 1.

Since the liquid crystal layer forming each display unit area has a certain thickness, when each of these display unit areas is divided by a dividing surface orthogonal to the display surface, the viewing angle is inclined with respect to the display surface during use. In this case, the invisible part is masked by the light reflection part from either side of the front and back surfaces,
The range of each display unit area seen from the front and back sides may be too narrow.

On the other hand, as described in the invention of claim 3, by arranging the light-reflecting portions on the front surface side and the back surface side thereof in accordance with the direction of the line of sight expected in the structure of the present liquid crystal display device. As described above, it is possible to eliminate a portion which is masked and cannot be seen from either side of the front and back surfaces.

As a result, according to the third aspect of the present invention, the display of each dot or segment may be unclear even when the viewing angle in use is inclined with respect to the display surface of the liquid crystal display device. It can be lost.

According to a fourth aspect of the present invention, the liquid crystal display device is attached to an electronic device so as to be openable and closable. The display on the back side of this liquid crystal display device is a mirror image of the display on the front side as described above. However, according to the invention of claim 4, the open / closed state of the liquid crystal display device is detected, and the display itself of the liquid crystal display device is mirror-inverted according to the open / closed state. It is possible to control so that the display on the viewing side is always a normal image.

When the liquid crystal display device is attached to the electronic equipment so as to be openable and closable as described above, the ambient lighting condition may change depending on whether the liquid crystal display device is closed or opened.

Therefore, as shown in the fifth aspect of the invention, if the light and shade of the display is changed by adjusting the driving voltage of the liquid crystal display device according to the open / closed state, the optimum liquid crystal will be obtained in any case. It becomes possible to obtain the displayed density.

According to the invention of claim 6, the drive circuit for displaying the liquid crystal display device and the display inversion circuit for performing the mirror image inversion according to the open / closed state are integrally provided in the unit of the liquid crystal display device. Therefore, only by replacing the unit of the liquid crystal display device with the conventional unit, the specification of the electronic device can be changed from the single-sided display to the double-sided display with almost no other configuration change.

[0034]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

(Embodiment 1) FIGS. 1 to 15 show a first embodiment of the present invention. FIG. 1 is a perspective view showing one display unit area of a liquid crystal display device, and FIG. 2 is a dot matrix. 3 is a view of the display panel surface of the liquid crystal display device of the system, FIG. 3 is a view of the display panel surface at the time of the display of FIG. 2, and FIG. 4 is a view of the other display panel surface of the liquid crystal display device of the dot matrix system.
5 is a view of the display panel surface during display of FIG. 4, FIG. 6 is a view of still another display panel surface of the dot matrix type liquid crystal display device, and FIG. 7 is a view of the display panel surface during display of FIG. is there.

FIG. 8 is a partial vertical sectional view of the liquid crystal display device in consideration of the angle of view (viewing angle) for viewing the display surface. FIG. 9 is a diagram showing the shape of the segment electrodes in the segment type liquid crystal display device. FIG. 10 is a diagram showing a shape of a light reflecting portion (hereinafter, referred to as a reflecting surface) of FIG. 9.

FIG. 11 is a diagram showing the shape of an italicized segment electrode, FIG. 12 is a diagram showing the shape of an italicized segment electrode that can be shared by left-right inversion, and FIG. 13 is a diagram showing the shape of the reflecting surface of FIG. FIG. 14 is a diagram showing a shape of an italic numeral segment electrode which can be shared by being turned upside down, and FIG. 15 is a view showing a shape of a reflecting surface of FIG.

FIG. 1 schematically illustrates a rectangular display unit area 1 in a liquid crystal display device. The display unit area 1 is
A display unit area 1 is a part of the liquid crystal layer 2 and a range where transparent electrodes (not shown) arranged on both surfaces of the liquid crystal layer 2 face each other. Therefore, the display state of the liquid crystal in the display unit area 1 always changes integrally according to the voltage applied between the transparent electrodes on both surfaces. This display unit area 1 is
Various shapes other than the illustrated square are formed according to the shape of the transparent electrode.

However, the transparent electrode itself does not always have the same pattern as the display unit area 1. For example, in the case of the segment method or the active matrix method, the transparent electrode on either surface of the liquid crystal layer 2 is In general, a plurality of or all of the display unit regions 1 are commonly formed as a common electrode, and in the case of the simple matrix system, a plurality of strip-shaped transparent electrodes are formed on both surfaces of the liquid crystal layer 2 so as to be orthogonal to each other. Books are formed one by one, and each of these intersections becomes a display unit area 1.

Reflector plates 3 and 4 are arranged on the front and back sides of the display unit area 1, respectively. Front side reflector 3
, The lower half of which is hatched constitutes a white reflecting surface (light reflecting portion) 3a, and the upper half thereof constitutes a transmitting surface 3b which transmits light. Further, the reflecting plate 4 on the back surface side is a reflecting surface (light reflecting portion) 4 whose upper half is white with hatching.
A transparent surface 4b that constitutes a and has a lower half that transmits light.
Is composed. These reflection surfaces 3a and 4a are preferably surfaces that diffuse and reflect incident light as evenly as possible to the surroundings, and for this reason, here, they are white surfaces close to perfect diffuse reflection. Regarding the transmissive surfaces 3b and 4b, such a plate-shaped portion that transmits light is not actually required, and the substance does not have to exist.

That is, the reflectors 3 and 4 formed only of the white reflective surfaces 3a and 4a may be arranged only in the lower half and the upper half of the front and back sides of the display unit area 1, respectively. Further, these reflection plates 3 and 4 can also be configured by appropriately forming thin white films on the respective facing surfaces of a pair of glass substrates that sandwich the liquid crystal layer 2. Thus, in FIG.
The display unit area 1 is vertically divided into two by a horizontal division surface orthogonal to the display surface, and the reflection surface 4a is arranged on the back surface side of the upper half area and the reflection surface 3a is arranged on the front surface side of the lower half area. It has been done.

In the display unit area 1 having the above-mentioned structure, when the liquid crystal layer 2 is in the light transmitting state, the light A reflected by the reflecting surface 4a on the back side passes through the upper portion of the liquid crystal layer 2 and the transmitting surface 3b, and becomes the front surface. Emit to the side. Further, the light reflected by the reflecting surface 3a on the front surface side is emitted to the rear surface side through the lower portion of the liquid crystal layer 2 and the transmitting surface 4b. Therefore, the liquid crystal display device including such a display unit area 1 can display the change in the display state of each display unit area 1 on both the front and back sides as a reflective liquid crystal display, and the movable portion and the optical panel can be displayed. Both sides can be displayed without using. Moreover, since the reflecting surfaces 3a and 4a can be formed on a glass substrate or the like that holds the liquid crystal layer 2 therebetween, the reflecting surfaces 3a and 4a can have exactly the same shape and size as a conventional liquid crystal display device.

The dot matrix type liquid crystal display device is
The display unit area 1 is used as each display dot, and a large number of the display dots are arranged vertically and horizontally in a matrix. FIG. 2 illustrates the front and back display panel surfaces 5 of a liquid crystal display device of a dot matrix system of 8 × 8 dots. Here, the alternate long and short dash line on the display panel surface 5 indicates the boundary of each display dot. On the front surface side of the display panel surface 5, the lower half of each display dot indicated by hatching is masked by the reflecting surface 3a, and on the rear surface side, the upper half of each display dot indicated by hatching is masked by the reflecting surface 4a. Therefore, these reflecting surfaces 3a and 4a are formed by eight lateral strip-shaped patterns.

When the character "A" is displayed on the liquid crystal display device having the above structure with 5 × 7 dots, as shown in FIG. 3, on the front surface side of the display panel surface 5, the upper half of each display dot is replaced with the back surface side. A display pattern formed by the light reflected by the reflection surface 4a appears, and a display pattern formed by the light reflected by the reflection surface 3a on the front surface appears in the lower half of each display dot on the back surface side. Therefore, although the originally square display dots are transformed into a horizontally long rectangular pattern and a gap is formed between the upper and lower dots, the character "A" can be displayed on both sides of the front and back sides, respectively.

In the liquid crystal display device shown in FIGS. 2 and 3,
Similar to the case of FIG. 1, the case where each display unit area 1 is divided into two above and below the display dot is shown, but in FIG. 4, each display unit area 1 is divided into four corners of the display dot and the remaining central portion. An example of the case of dividing into 5 is shown below.

On the front surface side of the display panel surface 5, a square reflecting surface 3a is formed in which the central portion of each display dot is inclined by 45 °.
And the four corners of each display dot on the back side are masked by the triangular reflecting surface 4a. Then, when the character "A" is displayed on this liquid crystal display device with 5 × 7 dots, as shown in FIG. 5, on the front surface side of the display panel surface 5, the reflection surface 4a on the rear surface side is formed at the four corners of each display dot. The display pattern due to the reflected light appears, and the display pattern due to the light reflected by the reflecting surface 3a on the front surface appears at the central portion of each display dot on the back surface side. Therefore, in this case, the deformation of each display dot becomes inconspicuous, and double-sided display can be performed without forming a gap between the upper and lower dots.

FIG. 6 shows an example of an 8 × 8 dot liquid crystal display device in which each display unit area 1 is diagonally divided into two diagonally divided display dots.

On the front surface side of the display panel surface 5, the upper left half of each display dot is masked by the reflection surface 3a, and on the back surface side, the lower right half of each display dot is masked by the reflection surface 4a. And this liquid crystal display device has 5 × 7
When the character “A” is displayed by dots, as shown in FIG. 7, on the front surface side of the display panel surface 5, a display pattern by the light reflected by the reflection surface 4a on the back surface is formed in the lower right half of each display dot. On the rear surface side, a display pattern by the light reflected by the front surface-side reflective surface 3a appears on the upper left half of each display dot. Therefore, also in this case, double-sided display can be performed without forming a gap between the upper and lower display dots.
However, in the example of FIGS. 5 and 7, it is unavoidable that a gap is formed between the display dots that are diagonally adjacent to each other.

Although FIG. 1 shows the case where the display unit area 1 is vertically divided by the division surface orthogonal to the display surface, in an actual liquid crystal display device, the display is not always viewed from the direction orthogonal to the display surface. Instead, it is normal to view the display from an oblique direction. Therefore, when it is expected that the line of sight when using this liquid crystal display device will be inclined by an angle φ with respect to the normal line of the display surface, as shown in FIG.
The divided surface C of is inclined by the same angle φ as the line of sight. Then, when the thickness of the display unit region 1, that is, the thickness of the liquid crystal layer 2 is d, the reflection surfaces 3a and 4a on the front and back sides are respectively (d /
2) Since they will be arranged offset by tanφ,
There is no waste that the light A that is reflected by the reflection surface 4a on the back surface side and is emitted in the line-of-sight direction on the front surface side is blocked by the reflection surface 3a on the front surface side, and is reflected by the reflection surface 3a on the front surface side. The light B emitted in the direction of the line of sight is reflected by the reflecting surface 4 on the back side.
There is no waste of being blocked by a.

Here, the thickness of the reflecting surfaces 3a, 4a is sufficiently thin and can be ignored. Further, if these reflecting surfaces 3a and 4a are white surfaces of almost complete diffuse reflection as described above, there is no possibility that the amount of light emitted in the line-of-sight direction is particularly reduced due to the deviation between the front and back surfaces.

In the segment type liquid crystal display device, the rectangular display unit area 1 shown in FIG. 1 is transformed into the shape of the corresponding segment, and a plurality of segments constituted by the display unit area 1 of each shape are arranged at predetermined positions. It is configured by arranging in. FIG. 9 shows the shape of each segment electrode 6 when the numbers are displayed in 7 segments.

In order to divide the display unit area 1 having the shape of the segment electrode 6 as described above, the divided pattern must maintain the characteristics of the original segment shape. Therefore, for example, as shown in FIG. 10, the shape of each segment electrode 6 is divided into a peripheral edge portion and an inner central portion thereof, and the reflection surface 3a on the front surface side is divided into a peripheral edge portion having the shape of each segment electrode 6, respectively. By arranging and arranging the reflection surface 4a on the back surface at the center portion inside thereof, it is possible to display the elongated pattern of each segment electrode 6 on both the front and back surfaces and to recognize the numerical segment display. Further, in this case, it is also possible to simply divide the shape of each segment electrode 6 into two along the division surface in the longitudinal direction. Further, the shape of each segment electrode 6 is divided into a large number of areas by a large number of horizontal or vertical dividing surfaces having a fine pitch, and the reflecting surfaces 3a and 4a are alternately formed in stripes on the front and back sides of these areas. When they are arranged, they can be applied not only to such segment shapes, but also to segments of any shape.

In the liquid crystal display device for displaying the numbers in seven segments as described above, it is common to display the numbers in italics by forming each segment electrode 6 in a slightly inclined pattern as shown in FIG. Is. However,
The numbers in this type of italic display are unnatural as they are because the inclination of the pattern of each segment electrode 6 is reversed as shown when viewed from the back surface side.

Therefore, as shown in FIG. 12, the shape of each segment electrode 6 is divided into an original pattern of a normal image of the segment and a pattern of the segment electrode 6 viewed from the back side, that is, a pattern of a mirror image of the normal image in the left-right direction. By stacking them, italicized numbers can be tilted to the same side when viewed from both front and back sides. In this case, as shown in FIG. 13, the reflection surface 4a on the back surface side is arranged so as to entirely mask the back surface of the portion of only the pattern of the normal image in the shape of each segment electrode 6, and
A portion where the patterns of the normal image and the mirror image overlap each other is divided and arranged in a large number of horizontal stripes.

The surface-side reflecting surface 3a is arranged so as to mask the entire surface of the portion of only the mirror image pattern in the shape of each segment electrode 6, and the portion where the normal image and the mirror image pattern overlap. In regard to the above, a plurality of stripes are arranged in the lateral direction alternating with the reflecting surface 4a. In the liquid crystal display device configured as above, when the display is viewed from the front surface side, the pattern of only the unnecessary mirror image in the shape of each segment electrode 6 is masked by the reflection surface 3a, and the display is viewed from the back surface side. In this case, of the shapes of the segment electrodes 6, the pattern of only the unnecessary normal image is masked by the reflecting surface 4a. Therefore, in any case, italicized numbers on the same side can be displayed. it can.

FIG. 14 shows the shape of the segment electrode 6 in which the normal image pattern of the original segment and the vertical mirror image pattern are superposed on each other.
The arrangement of a and 4a is shown in FIG. Also in this case, the italicized numbers when viewed from the front side and when viewed upside down from the back side can have the same pattern. In this way, the distinction between the horizontal mirror image and the vertical mirror image is that each segment electrode 6 shown in FIG.
However, in order to make the numbers displayed thereby easier to see, the shapes of the end portions are slightly different from each other.

(Embodiment 2) FIGS. 16 to 20 show a second embodiment of the present invention. FIG. 16 is a perspective view of an electronic apparatus having a liquid crystal display device, and FIG. 17 is an electronic device of FIG. FIG. 18 is a side view showing the line of sight of the user of the electronic device, and FIG. 19 is a side view showing the line of sight of the user of the electronic device with the display panel unit closed. Two
Reference numeral 0 is a block diagram showing a circuit configuration of the liquid crystal display device.

The electronic equipment of this embodiment comprises the dot matrix type liquid crystal display device shown in the first embodiment.
As shown in FIGS. 16 and 17, this electronic device is composed of a device body 11 and a display panel section 12 attached to the device body 11 so as to be openable and closable. The dot matrix type liquid crystal display device 13 is mounted on the display panel unit 12 so that the display can be seen from both front and back sides.

Here, as shown in FIG. 16, the display surface of the liquid crystal display device 13 which is visible when the display panel section 12 is opened is the front side, and as shown in FIG.
The display surface of the liquid crystal display device 13 that can be seen in the closed state is the back surface side. In addition, the display panel section 12 includes a hinge section 14
A detection switch 15 is provided in the vicinity of so that the open / closed state of the display panel section 12 can be detected. The detection switch 15 is provided in the vicinity of the hinge portion 14 for the purpose of preventing the user from accidentally touching the detection switch 15 and accidentally detecting the open / closed state.

In the liquid crystal display device 13 of the electronic equipment, when the display panel section 12 is opened, as shown in FIG.
It is expected that the user will see the display with a line of sight inclined by an angle φ from the direction normal to the display surface. In addition, the display panel unit 1
It is expected that the user will see the display with the line of sight tilted in substantially the same manner as shown in FIG. Therefore, as shown in FIG. 8 of the first embodiment, by using the liquid crystal display device 13 in which the reflecting surfaces 3a and 4a are displaced by the angle of the line of sight, the inclination of the line of sight causes such an inclination of the line of sight from the front and back sides. It is possible to prevent the display of the item from becoming difficult to see.

The circuit configuration of the liquid crystal display device 13 is shown in FIG.
Shown in The liquid crystal display device 13 includes an LCD unit 16
And a segment drive circuit 17 and a common drive circuit 18. The LCD unit 16 has a liquid crystal layer sandwiched between a pair of glass substrates on which transparent electrodes are formed, and display dots of m × n dots are arranged in a matrix. The segment drive circuit 17 is a circuit that receives the supply of the LCD drive power supply VLCD and applies a data signal to the segment electrodes X1 to Xn of the LCD unit 16.
The common drive circuit 18 is a circuit which receives supply of the LCD drive power source VLCD and scans the common electrodes Y1 to Ym of the LCD unit 16. The LCD unit 16, the segment drive circuit 17, and the common drive circuit 18 are integrated as a unit of the liquid crystal display device 13 and incorporated in the display panel section 12.

The segment drive circuit 17 includes the device body 1
A data signal and a clock signal for sampling the data signal are sent from the control circuit 19 provided in FIG. This data signal is sent to the device body 1
The control circuit 19 sequentially reads from a VRAM 20 provided as a video RAM [Random Access Memory] in FIG. Further, a clock signal for performing scanning and a reset signal for initializing the scanning are sent from the control circuit 19 to the common drive circuit 18.

The detection switch 15 has a resistor R4 at one end.
Is pulled up to the power supply VCC through the other terminal and the other end is grounded. Then, one end of the detection switch 15 is also connected to the direction input terminal DIR of the common drive circuit 18. The direction input terminal DIR scans the LCD unit 16 in the direction of U → D in the drawing, that is, the common electrodes Y1 → Ym when the input is at the H level, and when the input is at the L level, the D → U direction, that is, the common. This is a switching direction switching terminal that scans in the reverse order of the electrodes Ym → Y1. Also,
As shown in FIG. 16, when the display panel unit 12 is open, the detection switch 15 is in an open state, so that the input of the direction input terminal DIR becomes H level and scanning is performed in the direction U → D shown in the figure. As shown in 17, when the display panel unit 12 is closed, the detection switch 15 is closed, so that the input of the direction input terminal DIR becomes L level and D →
The scan is in the U direction.

Therefore, the liquid crystal display device 13 of this embodiment is
Since only the scanning direction is reversed depending on the open / close state of the display panel unit 12, if the display panel unit 12 is open and a normal image is displayed, when the display panel unit 12 is closed, the normal image is displayed. A mirror image in which the image is vertically inverted (scanning direction) is displayed. Then, as shown in FIG. 16, the display of the normal image viewed from the front side in the state where the display panel unit 12 is opened, and the display panel unit 12 as shown in FIG.
The display of the mirror image seen from the back side is the same when is closed.

As shown in FIG. 20, the detection switch 1
One end of 5 is also input to the feedback circuit 21. The feedback circuit 21 outputs the voltage of the LCD drive power source VLCD, which is the output of the voltage regulator 22, to the resistors R1 to R3.
It is a circuit that divides the voltage by and feeds it back to the voltage regulator 22 as a reference voltage again. With this circuit, the voltage of the LCD drive power supply VLCD can be stabilized. However, when the detection switch 15 is in the open state, the transistor Q1 and the transistor Q2 are turned on, so that the resistor R1 is bypassed and the voltage division ratio is changed.

Therefore, the feedback circuit 21 includes a voltage regulator 22 according to the open / close state of the detection switch 15.
It also has a function of changing the voltage of the LCD drive power supply VLCD output by the device in two steps. The resistor RC in the feedback circuit 21 is the collector resistor of the transistor Q1, and the resistor RPU is the pull-up resistor of the base of the transistor Q2.

Here, as shown in FIGS. 18 and 19, when the display panel section 12 is opened or closed,
If the user's line of sight looking at the liquid crystal display device 13 is inclined with respect to the display surface by a substantially constant angle φ, the angle of this line of sight will be different from the horizontal plane. When the absolute angle of the line of sight differs according to the open / closed state of the display panel unit 12 as described above, the lighting state also changes, and thus the light and shade of the display of the liquid crystal display device 13 may appear different.

Therefore, as described above, the display panel section 12
If the voltage of the LCD drive power source VLCD output from the voltage regulator 22 is changed according to the open / closed state of the switch, that is, the open / closed state of the detection switch 15, it is possible to automatically control so as to eliminate the difference in shade of the display. Becomes However, in such control, the optimum setting changes variously according to the characteristics of the actual liquid crystal display device 13 and the usage conditions.
The configuration of the feedback circuit 21 here is not limited, and the voltage of the LCD drive power supply VLCD may be changed by another appropriate configuration.

As described above, the electronic apparatus according to the present embodiment displays the liquid crystal display device 13 mounted on the display panel section 12 on both sides of the display panel section 12 so that the display panel section 12 can be opened or closed. This liquid crystal display device 1
The display of 3 can be made visible. Moreover, the liquid crystal display device 1 is selected according to the open / close state of the display panel section 12.
Since the display of No. 3 is mirror-inverted, it is possible to control this display to be a normal image from the viewing direction. Further, since the LCD unit 16, the segment drive circuit 17, and the common drive circuit 18 are integrated as a unit, the liquid crystal display device 13 can be replaced with a conventional single-sided display liquid crystal display device and a simple design change can be made. You can change the specifications of electronic devices.

(Embodiment 3) FIGS. 21 and 22 show a third embodiment of the present invention. FIG. 21 is a perspective view of a digital timepiece having a liquid crystal display device, and FIG. 22 is a liquid crystal display device. It is a block diagram showing a circuit configuration.

In this embodiment, a digital timepiece which displays time in segments will be described.

The digital timepiece of this embodiment comprises the segment type liquid crystal display device shown in the first embodiment.
As shown in FIG. 21, this digital timepiece is composed of a timepiece body 31 and a display panel section 32 attached to the timepiece body 31 so as to be vertically openable and closable.
The segment type liquid crystal display device 33 is mounted on the display panel section 32 so that the display can be viewed from both front and back sides. In addition, the display panel unit 32
A detection switch 35 is provided in the vicinity of the hinge part 34 so that the open / closed state of the display panel part 32 can be detected. The timepiece main body 31 is provided with a timepiece control circuit and various operation switches (not shown).

Liquid crystal display device 33 of the display panel section 32
Indicates a 6-digit display, and a segment electrode 36 made of a transparent electrode is formed on each digit segment. Reflector plates 37 and 38 as shown in the drawing are attached to the front and back surfaces of the liquid crystal display device 33, respectively. The reflection plate 37 attached to the front surface side is a thin white plate,
A transmissive portion 37a (black portion in the drawing) that transmits light is formed at a position corresponding to the peripheral edge portion of each segment electrode 36 of the liquid crystal display device 33. Further, the reflection plate 38 attached to the back surface side is also a thin white plate similar to the reflection plate 37, and transmits the light to a position corresponding to the central portion inside each segment electrode 36 (a black portion in the figure). ) Has been formed.

However, at the position of the reflection plate 37 on the front surface side corresponding to the segment electrode 36 of the first digit, the transmissive portion 37a is formed in the character shape of "AM" and "PM", and the segment of the same first digit is formed. At the position of the reflecting plate 38 on the back surface side corresponding to the electrode 36, a transmitting portion 38a is formed in a letter shape in which "AM" and "PM" are turned upside down.

The circuit configuration of the liquid crystal display device 33 is shown in FIG.
Shown in The liquid crystal display device 33 includes a segment display unit 39 and a multiplexer 40. The segment display unit 39 is one in which a liquid crystal layer is sandwiched between a pair of glass substrates, and a segment electrode 36 can perform a six-digit segment display. In this segment display, the first digit (Dig1)
Display the letters "AM" and "PM" in the second digit (Dig2)
And the 3rd digit (Dig3) displays the time in 7-segment numbers,
The symbol ":" is displayed in the 4th digit (Dig4), and the 5th digit (Dig4)
5) and 6th digit (Dig6) indicate the number of minutes in 7 segments.

The digit scan input terminals Dig1 to Dig6 of the segment display unit 39 are connected to the digit scan output terminals Di of the display controller 41 provided in the watch control circuit of the watch body 31.
Scan signals from g1 to Dig6 are input. The data signal output from the segment data output terminals Sega to Segg of the display controller 41 is
The segment data is input to the segment data input terminals Sega to Segg of the segment display unit 39 via the multiplexer 40. When the selection control terminal SEL is at the H level, the multiplexer 40 has one input A1 ...
Connect A7 to outputs Y1 to Y7 and select control terminal SEL is L
In the case of the level, it is a circuit that connects the other inputs B1 to B7 to the outputs Y1 to Y7.

In the circuit through one of the inputs A1 to A7 and the outputs Y1 to Y7 of the multiplexer 40, the segment data output terminals Sega to S of the display controller 41 are used.
The data signal from egg is directly input to the segment data input terminals Sega to Segg of the segment display unit 39. Further, in the circuit via the other inputs B1 to B7 and the outputs Y1 to Y7, the data signals from the segment data output terminals Sega to Segg are transmitted to the segment Se.
ga and segment Segd, segment Segb and segment S
The egc, the segment Seg and the segment Segf are exchanged and input to the segment data input terminals Sega to Segg of the segment display unit 39.

Selection control terminal SEL of multiplexer 40
Is connected to one end of the detection switch 35.
The other end of the detection switch 35 is grounded, and the one end is pulled up to the power supply Vcc through the resistor R5. When the display panel section 32 is open,
Since this detection switch 35 is opened, the H level is input to the selection control terminal SEL, and the display controller 41
The data signals from the segment data output terminals Sega to Segg are directly input to the segment data input terminals Sega to Segg of the segment display unit 39. Further, when the display panel section 32 is closed, the detection switch 35 is closed, so that the L level is input to the selection control terminal SEL and a part of the data signal is exchanged, and the segment data input terminal of the segment display unit 39 is replaced. Sega ~ Segg
Is input to

As described above, the liquid crystal display device 33 of the present embodiment.
Is the first digit (Dig) when the display panel 32 is open.
During scanning of 1), the data signal of either the segment Sega or the segment Segd is turned on to "AM" or "P".
"M" is displayed and the second digit (Dig2) to sixth digit excluding the fourth digit
At the time of scanning the digit (Dig6), the data signals of the segments Sega to Seg are appropriately turned on to display the number of hours and minutes.
At the time of scanning the digit (Dig4), the data signal of the segment Sega is alternately turned on to blink the symbol ":". In the display of each digit, since the light reflected by the reflection plate 38 on the back surface side is seen through the transmissive portion 37a of the reflection plate 37 on the front surface side, only the peripheral edge portion of the shape of each segment electrode 36 is displayed. .

When the display panel unit 32 is closed, the scanning direction does not change, but the segment of the data signal is
Since Sega to Segg can be switched up and down, a vertical mirror image is displayed. In the display of each digit, since the light reflected by the front surface side reflection plate 37 is viewed through the transmissive portion 38a of the rear surface side reflection plate 38, each segment electrode 36 is displayed.
Only the central part inside the is displayed. However, since the mirror image display in this case is viewed from the back side of the liquid crystal display device 33, the hour and minute numbers are displayed in the correct character shape and line, and the first digit (Dig1) "AM" is displayed. Alternatively, the display of "PM" is also displayed correctly.

As a result, according to the present embodiment, even in the case of the segment type liquid crystal display device 33, the multiplexer 4 is used.
Since the display can be vertically mirror-inverted by 0, it is possible to always see the display of the normal image regardless of the open / close state of the display panel unit 32. In addition, the liquid crystal display device 33 includes reflectors 37 and 38 and a multiplexer 40.
If the and are integrated as a unit, the specification of the electronic device can be changed to the double-sided display only by replacing the conventional single-sided display liquid crystal display device with a simple design change.

When the numbers for 7-segment display in the liquid crystal display device 33 of this embodiment are italicized as shown in FIG. 11, the segment electrodes 6 as shown in FIG. As described in the first embodiment, it is sufficient to form the reflecting surfaces 3a and 4a having the pattern shown in FIG.

(Embodiment 4) FIGS. 23 and 24 show a fourth embodiment of the present invention. FIG. 23 is a perspective view of a digital timepiece having a liquid crystal display device, and FIG. 24 is a liquid crystal display device. It is a block diagram showing a circuit configuration. The constituent members having the same functions as those of the third embodiment shown in FIGS. 21 and 22 are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, a digital timepiece for displaying time in segments will be described. However, as shown in FIG. 23, unlike the case of the third embodiment, the display panel section 32 equipped with the segment type liquid crystal display device 33 is attached to the timepiece main body 31 so as to be openable and closable in the left-right direction. . The liquid crystal display device 33 displays six digits as in the third embodiment, but the segment electrode 36 of the first digit (Dig1) has a sixth digit (Dig6) in addition to the original position at the left end. Also, two places are formed on the right side of each. Reflector plates 37 and 38 attached to the front and back surfaces of the liquid crystal display device 33.
Is almost the same as that of the third embodiment, but the reflector 3 on the back side is
Transparent portion 38a of characters "AM" and "PM" in FIG.
Is formed at the position on the right side of the sixth digit (Dig6) with the character shape reversed to the left and right.

The circuit configuration of the liquid crystal display device 33 is shown in FIG.
Shown in The segment display unit 39 of the liquid crystal display device 33 is also capable of performing 6-digit segment display in order from the left by the segment electrode 36. However, the segment display unit 39 is further to the right of the sixth digit (Dig6) segment electrode 36. Is formed by adding a segment electrode 36 of the first digit (Dig1). Further, in the liquid crystal display device 33, a second multiplexer 42 is added in addition to the first multiplexer 40. The first multiplexer 40 is
Similar to the third embodiment, the data signals output from the segment data output terminals Sega to Segg of the display controller 41 are sent to the segments of the segment display unit 39 via the inputs A1 to A4 or the inputs B1 to B4 and the outputs Y1 to Y4. The data is sent to the data input terminals Sega to Segg.

However, in the circuit through the inputs B1 to B7 and the outputs Y1 to Y7, the segment data output terminals Sega to Seg.
The data signal from g is segment Segb and segment S
The egf, the segment Segc, and the segment Seg are exchanged with each other and input to the segment data input terminals Sega to Segg of the segment display unit 39.

The second multiplexer 42 inputs the scanning signals from the digit scanning output terminals Dig1 to Dig6 of the display controller 41 to the digits of the segment display unit 39 via the inputs A1 to A4 or the inputs B1 to B4 and the outputs Y1 to Y4. Scan input terminal Dig1
~ Send to Dig6. And one input A1-A4
And the outputs Y1 to Y4, the scanning signals from the digit scanning output terminals Dig1 to Dig6 of the display controller 41 are directly input to the digit scanning input terminal Dig1 of the segment display unit 39.
~ Input to Dig6. Further, in the circuit via the other inputs B1 to B4 and outputs Y1 to Y4, the scanning signals from the digit scanning output terminals Dig1 to Dig6 of the display controller 41 reverse the order of each digit other than the first digit (Dig1). The digit scan input terminals Dig1 to Di of the segment display unit 39
It is designed to be input to g6.

One end of the detection switch 35 is connected to the selection control terminal SEL of each of the multiplexers 40 and 42. Therefore, since the H level is input to the selection control terminal SEL when the display panel section 32 is open, the segment data output terminal of the display controller 41 is
Data signal from Sega ~ Segg and digit scan output terminal Dig1 ~
The scanning signal from Dig6 is directly input to the segment data input terminals Sega to Segg and the digit scanning input terminals Dig1 to Dig6 of the segment display unit 39. Further, when the display panel unit 32 is closed, the L level is input to the selection control terminal SEL, so that the scanning signals other than the first digit (Dig1) are sent in the reverse order and part of the data signal is replaced. .

As described above, the liquid crystal display device 33 of the present embodiment.
In the state where the display panel section 32 is opened, the same display as in the case of the third embodiment is performed. When the display panel unit 32 is closed, the first digit (Dig1) is "AM" or "PM".
Other than the display, the scanning direction is reversed and the segments Sega to Segg of the data signal are also interchanged, so that a mirror image in the left and right direction is displayed. However, the display of this mirror image is
Since it is viewed from the back side of the liquid crystal display device 33, the numerical display of hours and minutes is the same as that viewed from the front side, and the display of "AM" or "PM" of the first digit (Dig1) is also performed. Similarly, it is displayed correctly on the left side of the time.

As a result, according to this embodiment, even in the case of the segment type liquid crystal display device 33, the multiplexer 4 is used.
Since the display can be mirror-inverted in the left-right direction by 0 and 42, it is possible to always see the display of the normal image regardless of the open / closed state of the display panel unit 32. Further, since it is only necessary to attach the reflection plates 37 and 38 to both sides of the liquid crystal display device 33, it is possible to change the specifications of the electronic device by simply replacing the conventional single-sided display liquid crystal display device and making a simple design change. You can

When the 7-segment display numbers in the liquid crystal display device 33 of this embodiment are made italic as shown in FIG. 11, the segment electrodes 6 as shown in FIG. As described in the first embodiment, it is sufficient to form the reflecting surfaces 3a and 4a having the pattern shown in FIG.

[0092]

As is apparent from the above description, according to the liquid crystal display device of the present invention and the electronic equipment equipped with this liquid crystal display device, it is possible to perform double-sided display of a reflective liquid crystal display with a simple structure. . Moreover, since it is not necessary to provide a special mechanical structure or an optical panel for this double-sided display, it is possible to downsize the device using this liquid crystal display device and suppress the cost increase of the product. Furthermore, since the shape and size of the liquid crystal display device itself can be made the same as that of the conventional single-sided display, it is possible to easily change the specifications to double-sided display without changing the design of existing products. become.

Further, since the mirror image of the display is automatically detected by detecting the open / closed state of the liquid crystal display device, it is possible to eliminate the inconvenience of looking through the mirror when the display is viewed from either side.

[Brief description of drawings]

FIG. 1 is a perspective view showing one display unit area of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a view of a display panel surface of a dot matrix type liquid crystal display device according to a first embodiment of the present invention.

FIG. 3 shows a first embodiment of the present invention, and FIG.
It is a figure of a display panel surface at the time of display of.

FIG. 4 is a view of another display panel surface of the dot matrix type liquid crystal display device according to the first embodiment of the present invention.

FIG. 5 shows the first embodiment of the present invention, and FIG.
It is a figure of a display panel surface at the time of display of.

FIG. 6 is a view of still another display panel surface of the dot matrix type liquid crystal display device according to the first embodiment of the present invention.

FIG. 7 shows a first embodiment of the present invention, and FIG.
It is a figure of a display panel surface at the time of display of.

FIG. 8 is a partial vertical cross-sectional view of a liquid crystal display device having a tilted viewing angle according to a first embodiment of the present invention.

FIG. 9 is a view showing a shape of a segment electrode in a segment type liquid crystal display device according to a first embodiment of the present invention.

FIG. 10 is a view showing the first embodiment of the present invention and showing the shape of the reflection surface of FIG. 9.

FIG. 11 shows the first embodiment of the present invention and is a diagram showing the shape of italicized segment electrodes.

FIG. 12 shows the first embodiment of the present invention, and is a diagram showing the shapes of italicized segment electrodes that can be shared by left-right inversion.

FIG. 13 shows the first embodiment of the present invention and is a diagram showing the shape of the reflecting surface of FIG.

FIG. 14 shows the first embodiment of the present invention, and is a diagram showing the shape of italicized segment electrodes which can be shared by being turned upside down.

15 is a view showing the first embodiment of the present invention and is a view showing the shape of the reflection surface of FIG.

FIG. 16 is a perspective view of an electronic device including a liquid crystal display device according to a second embodiment of the present invention.

FIG. 17 is a perspective view showing a second embodiment of the present invention when the display panel section of the electronic device of FIG. 16 is closed.

FIG. 18 shows a second embodiment of the present invention and is a side view showing the line of sight of the user of the electronic device.

FIG. 19 is a side view showing a second embodiment of the present invention and showing a line of sight of a user of an electronic device with a display panel section closed.

FIG. 20 shows a second embodiment of the present invention and is a block diagram showing a circuit configuration of a liquid crystal display device.

FIG. 21 is a perspective view of a digital timepiece having a liquid crystal display device according to a third embodiment of the present invention.

FIG. 22 is a block diagram showing a circuit configuration of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 23 is a perspective view of a digital timepiece including a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 24 is a block diagram showing a circuit configuration of a liquid crystal display device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 display unit area 2 liquid crystal layers 3a, 4a reflective surface (light reflection part) 6 segment electrode 13 liquid crystal display device 15 detection switch 18 common drive circuit 21 feedback circuit 22 voltage regulator 35 detection switch 36 segment electrode 37, 38 reflector plate 40, 42 multiplexer

Claims (6)

[Claims] 1. A liquid crystal display device, wherein transparent electrodes are arranged on both surfaces of a liquid crystal layer, and a display state of the liquid crystal layer is changed for each display unit area by a voltage applied between the transparent electrodes on both surfaces. Each display unit area is divided into two or more areas, a light reflecting portion is provided on the back surface side in the divided partial area, and a light reflecting portion is provided on the front surface side in the remaining divided area. Liquid crystal display device. 2. A liquid crystal display device for displaying numbers by 7 segments, comprising 7 transparent electrodes of a common segment shape in which a 7 segment normal image and its mirror image are superposed on at least one surface of a liquid crystal layer. The display unit regions formed in the liquid crystal layer by the respective seven transparent electrodes of the common segment shape are provided as a first region corresponding to only the normal image segment and a second region corresponding to only the mirror image segment. And a third region in which the normal image segment and the mirror image segment overlap each other, and a light reflecting portion is provided on the back surface side in the first region, and a light reflecting portion is provided on the front surface side in the second region. Is provided, and the third area of each display unit area is divided into two or more areas, and a light reflecting portion is provided on the back surface side in some of the divided areas, and the remaining area is provided in the divided areas. Is a liquid crystal display with a light reflection part on the front side Location. 3. In each of the display unit areas, the light reflection portions on the front surface side and the back surface side of the display unit area of the front surface side when the display surface is viewed from the direction of the line of sight expected from the structure of the present liquid crystal display device. The liquid crystal display device according to claim 1 or 2, wherein the light transmitting portion and the back surface side light reflecting portion overlap each other, and the front surface side light reflecting portion and the back surface side light transmitting portion overlap each other. . 4. An electronic device having the liquid crystal display device according to claim 1, which is attached to a device body so as to be openable and closable, and an open / close detection device for detecting an open / closed state of the liquid crystal display device. Means, a drive circuit for displaying the liquid crystal display device, and a display for inverting the display of the liquid crystal display device by the drive circuit when the open / close detection means detects one of the open / closed states. An electronic device including an inverting circuit. 5. The electronic device according to claim 4, further comprising drive voltage adjusting means for adjusting the drive voltage of the drive circuit according to the open / closed state detected by the open / close detecting means. 6. The electronic device according to claim 4, wherein the drive circuit and the display inversion circuit are integrally provided in a unit of the liquid crystal display device.