JP2003149672A - Electro-optical device and electronic equipment provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new electro-optical device capable of being housed compactly in an electronic equipment when providing a plurality of electro-optical panels therein and making an electronic equipment small in size and thin in thickness. SOLUTION: A part of various signal lines constituted of a wiring member 105 is a common signal line used both as a signal line (1st signal line) to be connected with semiconductor chips 117, 118 packaged on a 1st liquid crystal panel and a signal line (2nd signal line) to be connected with a semiconductor chip 137 packaged on a 2nd liquid crystal panel (namely, display lines CD to be connected with display data input terminals C1-Cm of a 1st input terminal part 105, and signal lines to be connected with a high potential terminal VDD(L) arrayed in the 1st input terminal part 105e, a data discrimination terminal C0, a reference potential terminal GND, a read signal terminal RD, and a write signal terminal WR, respectively).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-optical device and electronic equipment, and more particularly to a structure of an electro-optical device including a plurality of electro-optical panels.

[0002]

2. Description of the Related Art Generally, a liquid crystal display device having a liquid crystal display panel, a light guide plate arranged behind the liquid crystal display panel, and a light source arranged on a side of the light guide plate facing the end face of the light guide plate is known. Are known. In this liquid crystal display device,
The light emitted from the light source enters the light guide plate from the end face, is refracted in the light guide plate, is irradiated from the front surface of the light guide plate to the liquid crystal display panel, passes through the liquid crystal display panel, and finally The light is emitted to the front side of the panel (observation side).

FIG. 8 is a schematic sectional view schematically showing the structure of a liquid crystal display device 10 as an example of a conventional liquid crystal display device. The liquid crystal display device 10 includes a support 11 made of synthetic resin, a light guide plate 12 engaged and fixed to the support 11, a reflection sheet 13 arranged behind the light guide plate 12, The light guide plate 12 includes a frame-shaped light-shielding sheet 14 arranged on the front surface (upper surface in the drawing) and a liquid crystal display panel 20 arranged on the front surface side of the light-shielding sheet 14.

The liquid crystal display panel 20 is formed by bonding substrates 21 and 22 made of glass or the like with a sealing material 23 and enclosing a liquid crystal 24 inside the sealing material 23. Polarizing plates 25 and 26 are attached to the outer surfaces of the substrates 21 and 22. A semiconductor chip 27 that constitutes a liquid crystal drive circuit is mounted on the end portion of the substrate 21.

A flexible wiring board 15 is connected to the liquid crystal display panel 20, and a wiring pattern (not shown) is formed on the flexible wiring board 15. As shown in FIG. The panel-side terminal portion 15a is conductively connected, and the input terminal portion 15b is conductively connected to a connector or the like installed inside an electronic device or the like. A light source 16 such as an LED (light emitting diode) which emits light to the light guide plate 12 is mounted on the flexible wiring board 15, and a power supply circuit 17 used for driving the liquid crystal display panel 110 and the like. Is configured.

By the way, in recent years, particularly in portable electronic devices (for example, mobile phones), the first liquid crystal display screen is arranged on the front surface side of the thin structure portion of the device, and the second liquid crystal display is arranged on the back surface side of the thin structure portion. Display screen may be arranged. In such a case, the first liquid crystal display device and the second liquid crystal display device are separately attached to the inside of the front surface side and the inside of the back surface side of the thin structure portion. For example, a circuit board is arranged inside the thin structure portion, the first liquid crystal display device is mounted on the front surface of the circuit board, and the second liquid crystal display device is mounted on the back surface of the circuit board.

[0007]

By the way, in recent years, there has been an increasing demand for miniaturization and thinning of portable electronic devices, and it is necessary to make the liquid crystal display device 10 thin. Not only the panel 20 but also the light guide plate 12 is becoming thinner. However, when it is attempted to incorporate the first liquid crystal display device and the second liquid crystal display device having the display screens on the front and back sides into the thin structure portion of the device, the thickness of at least one liquid crystal display device is Since it is doubled, there is a problem that it is difficult to sufficiently thin the thin structure portion.

Further, by incorporating the two liquid crystal display devices in the thin structure portion, it becomes necessary to connect the two flexible wiring boards 15 to the connectors on the equipment side, respectively, and therefore it is difficult to arrange the wiring members in the electronic equipment. Therefore, there is a problem that it is difficult to reduce the size, and if the size is forcibly reduced, the assembling work becomes difficult.

Therefore, the present invention solves the above-mentioned problems, and the problem is that when a plurality of electro-optical panels such as the above-mentioned liquid crystal display panel are provided, they can be compactly housed in an electronic device, It is an object of the present invention to provide a novel electro-optical device that can be made compact and thin.

[0010]

In order to solve the above problems, an electro-optical device according to the present invention controls or drives a first electro-optical panel, a second electro-optical panel, and the first electro-optical panel. Input terminal and a common input terminal that also serves as an input terminal for controlling or driving the second electro-optical panel.

According to the present invention, in the electro-optical device including the first electro-optical panel and the second electro-optical panel,
Reducing the number of input terminals by having a common input terminal that also serves as an input terminal for controlling / driving the first electro-optical panel and an input terminal for controlling / driving the second electro-optical panel. Since it is possible to reduce the size of the input terminal portion and the connector, the wiring between the electro-optical device and the device main body can be easily routed, which facilitates the assembly work and reduces the manufacturing cost. .

In the present invention, there is provided a first driving means for driving the first electro-optical panel and a second driving means for driving the second electro-optical panel, and the input terminal includes:
It may be provided with a first input terminal for supplying a first signal to the first driving means and a second input terminal for supplying a second signal to the second driving means.

In the present invention, it is preferable that the common input terminal is a display data input terminal for inputting display data to the first driving means and the second driving means.

According to the present invention, the first drive means and the second drive means
By making the display data input terminal for inputting display data to the driving means a common input terminal, a large number of display data input terminals for inputting display data are provided corresponding to the data lines or segment lines of the electro-optical panel. In many cases, the number of input terminals can be significantly reduced by making the display data input terminal a common input terminal.

In the present invention, the first input terminal and the second input terminal receive a switching signal for determining which of the first driving means and the second driving means is to be operated or not to be operated. It is preferable that the switching input terminal is included.

According to the present invention, by including the switching input terminal, the signal input to the common input terminal is
Since it becomes possible to select which of the electro-optical panel and the second electro-optical panel is used for driving, the switching signal input to the switching input terminal and various signals input to the common input terminal are associated with each other. By controlling, it becomes possible to freely drive the first electro-optical panel and the second electro-optical panel.

In the present invention, it is preferable that a common wiring member is connected to the first electro-optical panel and the second electro-optical panel, and the input terminal is formed on the wiring member.

According to the present invention, the number of parts can be reduced and the assembling work can be facilitated. At this time, the wiring member is preferably a wiring board, and particularly preferably a flexible wiring board.

Next, another electro-optical device according to the present invention comprises a first electro-optical device.
An electro-optical panel, a second electro-optical panel, a shared signal line that also serves as a signal line for controlling or driving the first electro-optical panel and a signal line for controlling or driving the second electro-optical panel. And are included.

According to the present invention, in the electro-optical device including the first electro-optical panel and the second electro-optical panel,
A signal line for controlling and driving the first electro-optical panel,
Since the number of signal lines can be reduced by having a shared signal line that also serves as a signal line for controlling and driving the second electro-optical panel, it is possible to reduce the area occupied by the wiring pattern. Therefore, the wiring portion can be downsized and the manufacturing cost can be reduced.

In the present invention, there is provided a first driving means for driving the first electro-optical panel and a second driving means for driving the second electro-optical panel, and the first driving means as the signal line. In some cases, a first signal line for supplying a first signal to the second drive line and a second signal line for supplying a second signal to the second drive means are provided.

In the present invention, it is preferable that the shared signal line is a display data signal line for transmitting display data to the first driving means and the second driving means.

According to the present invention, the first drive means and the second drive means
The display data signal line for inputting the display data to the driving means is a shared signal line, so that a large number of display data signal lines for inputting the display data are provided corresponding to the data lines or segment lines of the electro-optical panel. Since the display data signal line is a common signal line in many cases, the number of signal lines can be significantly reduced.

In the present invention, it is preferable that a common wiring member is connected to the first liquid crystal panel and the second liquid crystal panel, and the signal line is provided on the wiring member.

According to the present invention, the number of parts can be reduced and the assembling work can be facilitated. At this time, the wiring member is preferably a wiring board having the signal line as a wiring pattern, and in particular, a flexible wiring board in order to reduce the size and thickness of the electro-optical device or increase the flexibility of the structure. Is desirable.

In the present invention, a switching signal for deciding which of the first drive means and the second drive means to operate or not to operate is sent to the first signal line and the second signal line. It is preferable to include a switching signal line.

According to the present invention, by including the switching signal line, it is possible to select which of the first electro-optical panel and the second electro-optical panel the signal input to the shared signal line is used for driving. Since it becomes possible, the first electro-optical panel and the second electro-optical panel can be freely controlled by associating and controlling the switching signal transmitted through the switching signal line and various signals transmitted through the shared signal line. It becomes possible to drive to.

In the present invention, the first electro-optical panel and the second electro-optical panel are arranged so as to overlap each other in a plane, and the display surface of the first electro-optical panel and the second electro-optical panel are arranged.
It is preferable that the display surface of the electro-optical panel is formed on the opposite side to the front and back sides.

According to the present invention, when the first electro-optical panel and the second electro-optical panel are arranged so as to overlap each other in plan view and the device having the display surfaces on both front and back surfaces is constructed, the input terminal section is formed. The effects of the present invention are particularly remarkable because mutual interference between the connectors and connectors, and the entanglement of wiring between the electro-optical device and the device body are likely to occur, or the wiring occupying area of the wiring pattern of the wiring portion is likely to increase. Appears in.

In the present invention, it is preferable that the first electro-optical panel and the second electro-optical panel are directly or indirectly supported by a common support.

According to the present invention, since the first electro-optical panel and the second electro-optical panel are both supported by the common supporting member, the size of the panel module can be reduced as compared with the case where the panel modules are separately configured. The thickness can be reduced.

In the present invention, it is preferable that a common wiring member is connected to the first electro-optical panel and the second electro-optical panel, and the input terminal or the signal line is formed on the wiring member.

According to the present invention, the number of parts can be reduced and the assembling work can be facilitated. At this time, the wiring member is preferably a wiring board, and particularly preferably a flexible wiring board.

Next, the electronic equipment of the present invention is characterized by including the electro-optical device according to any one of the above, and a display control means for sending a display control signal to the electro-optical device.

According to the present invention, the electro-optical device can be downsized and the connection structure between the electro-optical device and the device body can be simplified, so that the electronic device can be downsized and thinned or assembled. The work can be facilitated.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of an electro-optical device and electronic equipment according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment] FIG. 1 is a schematic vertical sectional view showing a schematic configuration of a liquid crystal display device which is a first embodiment of an electro-optical device according to the invention. The liquid crystal display device 100 includes a first liquid crystal display panel 110 and a first liquid crystal display panel 110.
Second side placed back to back with the side opposite to the observation side
And a liquid crystal display panel 130.

The first and second liquid crystal display panels 110 and 13
0 is two substrates 11 each made of glass or the like
1,112,131,132 seal material 113,133
And the liquid crystal 1 inside the sealing materials 113 and 133.
14,134 is enclosed. Two boards 1
Electrode patterns are formed on inner surfaces of 11, 112, 131132 facing each other, and the liquid crystal 1 is formed according to a voltage applied between the electrodes facing each other with the liquid crystals 114, 134 interposed therebetween.
14,134 are configured to change the orientation state. The semiconductor chip 11 constituting the liquid crystal drive circuit is provided on the substrate overhanging portions of the substrate 111 and the substrate 131 (portions overhanging the outer shapes of the other substrates 112 and 132).
7, 118 (see FIG. 2) and 137 are mounted. A wiring pattern (not shown) is drawn out from the electrode patterns of the liquid crystal display panels 110 and 130, and the wiring pattern is conductively connected to the semiconductor chips 117, 118 (see FIG. 2) and 137.

First and second liquid crystal display panels 110 and 13
At 0, a wiring member 105 composed of a flexible wiring board or the like is conductively connected to the board extension portion. The semiconductor chip 11 is connected through the wiring member 105.
A signal is externally input to 7, 118 and 137. In addition, as described above, the liquid crystal panel 11
The semiconductor chip in which the liquid crystal drive circuit and the like are directly mounted is not mounted on 0 and 130, but the liquid crystal drive circuit may be configured (the semiconductor chip is mounted) on the wiring member 105. .

In this embodiment, a backlight is arranged behind the first liquid crystal display panel 110, and the backlight includes a light source (first light source) 121 composed of an LED (light emitting diode) and an acrylic resin. And a light guide plate (first light guide plate) 122. Also, the second
A backlight is also arranged behind the liquid crystal display panel 130, and this backlight includes a light source (second light source) 141 configured by an LED (light emitting diode) and a light guide plate (second light source) configured by an acrylic resin or the like. Light guide plate) 142. Here, a reflection sheet (light reflection layer) 102 is arranged between the light guide plates 122 and 142, and the reflection sheet 102 is emitted from the light sources 121 and 141 and is guided by the light guide plate 1.
The light propagating in the light guide plates 122 and 142 is reflected, the light in the light guide plate 122 is directed to the liquid crystal display panel 110, and the light in the light guide plate 142 is directed to the liquid crystal display panel 130.

The support 101 is formed by integral molding of synthetic resin or the like. The support 101 is the light guide plate 12
2 and the light guide plate 142 are configured to be engaged and held. A frame-shaped light-shielding sheet 103 is interposed between the light guide plate 122 and the first liquid crystal display panel 110. Further, a light shielding sheet 104 formed in a frame shape is interposed between the light guide plate 142 and the second liquid crystal display panel 130.

FIG. 2 is a schematic configuration diagram schematically showing the connection relationship between the wiring member 105 and the first and second liquid crystal display panels 110 and 130. The wiring member 105 is the first
First terminal portion 10 conductively connected to the liquid crystal display panel 110
5a and the first mounting portion 105b on which the light source 121 is mounted
A second terminal portion 105c conductively connected to the second liquid crystal display panel 130, a second mounting portion 105d on which the light source 141 is mounted, and a first input terminal portion connected to an internal connector or the like of an electronic device or the like. 105e and the second input terminal portion 105
f and.

In the present embodiment, the first liquid crystal display panel 110 uses a two-terminal element including a pixel (segment) electrode connected to a TFD (thin film diode) element and a common electrode facing the pixel (segment) electrode. The case where the second liquid crystal display panel 130 is an active matrix type liquid crystal panel and the second liquid crystal display panel 130 is a passive matrix type liquid crystal panel will be described below. However, the present invention is not limited to such a combination of liquid crystal panels.

FIG. 3 is a schematic configuration diagram schematically showing details of the wiring pattern formed on the wiring member 105. The first terminal portion 105 a of the wiring member 105 is provided with a segment terminal region S connected to the semiconductor chip 117 and a common terminal region C connected to the pair of semiconductor chips 118, 118. In the segment terminal area S, n display data terminals A1 to An connected to the data bus are formed so as to extend to the first input terminal portion 105e.
It is included. In addition, a logic output system potential terminal, a logic input system potential terminal, a liquid crystal drive system potential terminal, a liquid crystal drive system reference terminal for supplying a power source potential output from a power supply circuit configured by a semiconductor chip 107A mounted on the wiring member 105. It also has various power supply terminals such as potential terminals.

On the other hand, in the common area C, a plurality of liquid crystal drive potential terminals serving as internal logic potential terminals, reference potential terminals, liquid crystal drive circuit potential terminals, and liquid crystal drive power sources (V0, V1, V4, V5). And a shift clock terminal for outputting the shift clock of the display data, a data terminal for outputting the data of the shift register, a terminal for outputting the alternating signal of the liquid crystal drive output, and the like.

The second terminal portion 105c conductively connected to the semiconductor chip 137 is connected to the data bus m.
Display data terminals B1 to Bm are included. Also,
A logic output system potential terminal, a logic input system potential terminal, a liquid crystal drive system potential terminal, a liquid crystal drive system reference potential terminal that supplies a power supply potential output from a power supply circuit configured by a semiconductor chip 107B mounted on the wiring member 105. And so on.

The signal terminals arranged in the first terminal portion 105a are either extended directly from the first input terminal portion 105e or drawn from the power supply circuit 107A formed on the wiring member 105. It is connected to the signal line or is connected to the first input terminal portion 105e via an electronic component such as a resistor and a capacitor. Further, each signal terminal arranged in the second terminal portion 105c is directly extended from the second input terminal portion 105f or the first input terminal portion 105e, and further, the wiring is provided. It is connected to the signal line drawn from the power supply circuit 107B formed on the member 105, or is connected to the second input terminal portion 105f via an electronic component such as a resistor and a capacitor.

The first input terminal portion 105e includes n display data input terminals C1 to Cn connected to the data bus. The display data input terminals C1 to Cn are respectively connected to m display data lines AD connected to the display data terminals A1 to Am arranged on the first terminal portion 105a on the wiring member 105. It is directly connected to the input terminals C1 to Cm connected to the display data line (shared signal line) CD of the book and the display data line AD connected to the display data terminals Am + 1 to An arranged in the first terminal portion 105a. Input terminal Cm + 1
~ Cn are included. Here, the m display data lines CD are also connected to the m display data lines BD connected to the display data terminals B1 to Bm arranged in the second terminal portion 105c.

Further, the first input terminal portion 105e has a data identification terminal C0 for transmitting a data identification signal indicating whether the signals input from the display data input terminals C1 to Cn are display data or command data. A high potential terminal VDD (L) for supplying a high potential for internal logic and a reference potential terminal GND for supplying a reference potential (ground potential) are arranged. These are connected via a signal line branched on the wiring member 105 (it becomes a shared signal line up to the branch point).
The first terminal portion 105a and the second terminal portion 105c are connected to a corresponding data identification terminal (not shown), a high potential terminal for internal logic, and a reference potential terminal.

A switching signal terminal CS for sending a switching signal (chip select signal) to the first input terminal portion 105e.
And a reset terminal RES for inputting a reset signal for resetting the semiconductor chip and performing initialization. The switching signal terminal CS and the reset terminal RES are directly connected to the switching signal terminal and the reset terminal (not shown) arranged in the first terminal portion 105a via the signal line.

Further, light source potential lines OP2 and ON2 are arranged in the first input terminal portion 105e, respectively, and these light source potential lines OP2 and ON2 are conductively connected to the light source 121 mounted on the wiring member 105. Has been done. In addition, the second input terminal portion 105f has a light source potential line OP
4, ON4 are arrayed, and these light source potential lines OP4,
The ON 4 is conductively connected to the light source 141 mounted on the wiring member 105.

A switching signal terminal XCS for sending a switching signal (chip select signal) to the second input terminal portion 105f.
And a reset terminal XRES for inputting a reset signal for resetting the semiconductor chip and performing initialization. The switching signal terminal XCS and the reset terminal XRES are directly connected to the switching signal terminal and the reset terminal (not shown) arranged in the second terminal portion 105c via the signal line. Here, the switching signal terminal XCS is configured such that an inverted signal of the switching signal input to the switching signal terminal CS of the first input terminal portion 105e is applied from the device body described later. Further, the reset terminal XRES is connected to the reset terminal RES of the first input terminal section 105f from the device main body described later.
The inversion signal of the reset signal input to is applied.

Further, the read signal terminal RD is arranged in the first input terminal portion 105e, and the read signal line connected to this read signal terminal RD is branched halfway (it becomes a shared signal line up to the branch point). ) Both are connected to the read signal terminals provided in the first terminal portion 105a and the second terminal portion 105c, respectively. Further, a write signal terminal WR is arranged in the first input terminal portion 105e, and the write signal line connected to this write signal terminal WR is branched halfway (it becomes a shared signal line up to the branch point). ) Both are connected to the write signal terminals respectively arranged in the first terminal portion 105a and the second terminal portion 105c.

FIG. 4 shows semiconductor chips 117 and 118 conductively connected to the first terminal portion 105a of the wiring member 105.
3 is a configuration block diagram schematically showing the internal configuration of FIG. The semiconductor chip 117 is a segment driver chip of the liquid crystal display panel 110, and includes an input / output circuit 1171 connected to the first terminal portion 105a of the wiring member 105, an internal bus 1172 connected to the input / output circuit 1171, and an internal bus. An input / output buffer 1173 for temporarily storing display data received from 1172 and a display data RAM 1174 for storing display data received from the input / output buffer 1173.
And a PWM decoder circuit 1175 for generating a control signal based on the display data of the display data RAM 1174, and P
And a segment drive circuit 1176 which forms a liquid crystal drive signal (segment potential) according to a control signal of the WM decoder circuit 1175.

Further, a column address control circuit 117A for controlling the input / output buffer 1173 and a display data RAM
A page address control circuit 117B for controlling the 1174 is provided. Here, the input / output buffer 1173,
The column address control circuit 117A and the page address control circuit 117B are controlled by the MPU system control circuit 1179 which controls the input / output of commands and display data from the first terminal unit 105a. In addition, the driver system control circuit 1178 which operates by receiving the clock signal from the oscillation circuit 1177 has a page address control circuit 117.
It controls the B and PWM decoder circuits 1175.

In the above circuit configuration, the segment drive circuit 1176 has a segment potential on each of a plurality of wirings (for example, wirings connected to the TFD element) of the liquid crystal display panel 110 based on the display data received from the first terminal portion 105a. To supply.

On the other hand, in the semiconductor chip 118, a common control circuit 1181 for inputting a shift clock of display data and signals according to various control modes, and a bidirectional shift register for fetching and operating data according to the shift clock. 1182, an output control circuit 1183 for controlling the output of the bidirectional shift register 1182, and a level shifter 11 for receiving the output of the output control circuit 1183.
84, and a common drive circuit 1185 that receives the output of the level shifter 1184 and supplies a common potential to each of the common electrodes of the liquid crystal display panel 110.

FIG. 5 is a structural block diagram schematically showing the internal structure of the semiconductor chip 137 conductively connected to the second terminal portion 105c of the wiring member 105. A timing signal generating circuit 1371 is provided in the semiconductor chip 137. Further, a gradation signal generation that generates a gradation signal according to display data 1372 connected to the second terminal portion 105c and display data received from the display memory 1372, which operates according to the timing signal generated by the timing signal generation circuit 1371. A circuit 1373 and a data line driver 1374 for driving the data line of the liquid crystal display panel 130 by the grayscale signal of the grayscale signal generation circuit 1373 are included. Further, a selection signal generation circuit 1375 which operates according to a timing signal and a scanning line driver 1376 which operates according to the selection signal of the selection signal generation circuit 1375 and drives a scanning line of the liquid crystal display panel 130 are provided.

FIG. 6 schematically shows a schematic structure of a display system circuit (display control means) of the electronic equipment body which is conductively connected to the first input terminal portion 105e and the second input terminal portion 105f of the wiring member 105. It is a schematic block diagram. The display system circuit is an MPU (microprocessor unit) 301.
And an input / output circuit 302 and an input / output circuit 303 connected to the MPU 301. The input / output circuit 302 is connected to the first input terminal portion 105e, and the input / output circuit 303 is connected to the second input terminal portion 105f.

According to this embodiment having the above configuration, the MPU 3
01 outputs various display control signals to the first input terminal portion 105e of the wiring member 105 via the input / output circuit 302, and the wiring member 105 via the input / output circuit 303.
Various display control signals are output to the second input terminal portion 105f.

Here, the switching signal terminal CS becomes "H" and the switching signal terminal XCS becomes "H" by the operation of the MPU 301.
When the reset terminal RES is set to "H" and the reset terminal XRES is set to "L" as well as L ", the semiconductor chips 117 and 118 connected to the first terminal portion 105a are activated to turn on the liquid crystal display panel 110. , The second terminal portion 1
The semiconductor chip 137 connected to 05c stops, and the liquid crystal display panel 130 turns off. At this time, display data is output to the semiconductor chip 117 via a data bus composed of n display data lines CD and AD connected to the display data input terminals C1 to Cn of the first input terminal portion 105e. An image corresponding to the display data is displayed on the first liquid crystal display panel 110.

On the other hand, the switching signal line CS becomes "L" and the switching signal line XCS becomes "H", and the reset terminal RES becomes "L" and the reset terminal XRES becomes "L".
When it becomes H ″, the semiconductor chips 117 and 118 are stopped and the semiconductor chip 137 is activated.
Display data is output to the semiconductor chip 137 via a data bus composed of m display data lines CD and BD connected to the display data input terminals C1 to Cm, and an image corresponding to the display data is displayed on the second liquid crystal. It is displayed on the display panel 130.

In this embodiment, as described above, some of the various signal lines formed in the wiring member 105 are
First liquid crystal display panel 110 and semiconductor chips 117, 1
A signal line (first signal line) connected to 18 and a signal line (second signal line) connected to the second liquid crystal display panel 130 and the semiconductor chip 137. A display data line CD connected to the display data input terminals C1 to Cm of the terminal portion 105e,
High potential terminals VDD arranged in the first input terminal portion 105e
(L), the data identification terminal C0, the reference potential terminal GND, the read signal terminal RD, and the signal line respectively connected to the write signal terminal WR), the wiring area of the wiring member 105 can be reduced. Therefore, the wiring member 105 can be downsized. Also, the first input terminal portion 1
Since the number of terminals arranged on the 05e and the second input terminal portion 105f can also be reduced, the connector structure for connecting to the main body of the electronic device can be downsized, and the connection wiring can be easily handled. The occupied space in is also reduced. Further, the manufacturing cost can be reduced by downsizing the wiring member and the connector structure.

FIG. 7 is a schematic perspective view (a) and (b) showing the external appearance of a mobile phone 1000 as an example of an electronic apparatus incorporating the liquid crystal display device 100. The mobile phone 1000 has a main body 1001 provided with various operation buttons and a built-in microphone, and a display 1002 having a display screen and an antenna and a built-in speaker.
And the display unit 1002 are configured to be mutually foldable. The liquid crystal display device 10 described above is provided in the display unit 1002.
0 is built in, the display screen of the first liquid crystal display panel 110 is visible on the inner surface thereof, and the display screen of the second liquid crystal display panel 130 is visible on the outer surface thereof. ing.

In this embodiment, by opening the display unit 1002 from the main body unit 1001 as shown in FIG. 7A, the first liquid crystal display panel 110 is turned on by the switching signal applied to the switching signal terminal CS. , A predetermined image is displayed, and the second liquid crystal display panel 130 is turned off by the switching signal applied to the switching signal terminal XCS. Also, FIG.
By folding the display section 1002 on the main body section 1001 as shown in (b), the potential of the switching signal terminal CS is inverted and the liquid crystal display panel 110 is turned off. Instead, it is applied to the switching signal terminal XCS. The liquid crystal display panel 130 can be turned on and a predetermined image can be displayed by inverting the switching signal.

In the present embodiment, since the liquid crystal display device 100 is made thin as described above, the display unit 1002 can be made thin, and the internal structure thereof can be simplified, and the assembling can be performed. Work can be easily performed.

The electro-optical device and the electronic apparatus of the present invention are not limited to the above-mentioned illustrated examples, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, as an electro-optical device,
The invention is not limited to the liquid crystal display device including the liquid crystal display panel as described above, but may be one including an electroluminescence panel, a plasma display panel, or the like.

[0068]

As described above, according to the present invention,
It is possible to reduce the size of the electro-optical device, facilitate the assembling work, and reduce the manufacturing cost. Further, when the electro-optical device is built in the electronic device, the mounting work can be facilitated and the occupied space can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a schematic structure of a liquid crystal display device 100 which is an embodiment of an electro-optical device according to the invention.

2 is a schematic explanatory view schematically showing a corresponding structure of a liquid crystal display panel of the liquid crystal display device 100 and a wiring member. FIG.

3 is a schematic explanatory view schematically showing an outline of a wiring pattern on a wiring member of the liquid crystal display device 100. FIG.

4 is a schematic configuration diagram showing an internal configuration of semiconductor chips 117 and 118 mounted on the first liquid crystal display panel 110. FIG.

5 is a schematic configuration diagram showing an internal configuration of a semiconductor chip 137 mounted on a second liquid crystal display panel 130. FIG.

FIG. 6 is a schematic configuration diagram schematically showing a configuration of a display control system in a device body of an electronic device.

FIG. 7 is a mobile phone 100 as an embodiment of an electronic device.
It is a schematic perspective view (a) and (b) which shows the external appearance of FIG.

FIG. 8 is a schematic sectional view schematically showing a schematic structure of a conventional liquid crystal display device.

FIG. 9 is a schematic plan view showing an example of a planar shape of a wiring member (flexible wiring board) used in a conventional liquid crystal display device.

[Explanation of symbols]

100 ... Liquid crystal display device 101 ... Support 105: wiring member 105a: first terminal portion 105c ... second terminal portion 105e ... First input terminal portion 105f: second input terminal section 110 ... First liquid crystal display panel 130 ... second liquid crystal display panel 1000 ... mobile phone A1 to An, B1 to Bm ... Display data terminals C1 to Cn ... Display data input terminals AD, BD, CD ... Display data line VDD (L) ・ ・ ・ High potential terminal GND: Reference potential terminal C0 ... Data identification terminal RD: Read signal terminal WR: Write signal terminal CS, XCS ... Switching signal terminal RES, XRES ... Reset terminal

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Claims (13)

[Claims] 1. A first electro-optical panel, a second electro-optical panel, an input terminal for controlling or driving the first electro-optical panel, and an input terminal for controlling or driving the second electro-optical panel. An electro-optical device having a shared input terminal that also serves as a. 2. A first driving device for driving the first electro-optical panel.
A first input terminal for supplying a first signal to the first driving means as the input terminal, and a second driving means for driving the second electro-optical panel. The second input terminal that supplies a second signal to the electro-optical device according to claim 1. 3. The electro-optical device according to claim 2, wherein the shared input terminal is a display data input terminal for inputting display data to the first driving means and the second driving means. . 4. A switch for receiving a switching signal for determining which of the first drive means and the second drive means is to be operated or not to be operated, at the first input terminal and the second input terminal. The electro-optical device according to claim 1, further comprising an input terminal. 5. The wiring member common to the first electro-optical panel and the second electro-optical panel is connected, and the input terminal is formed on the wiring member. Item 5. The electro-optical device according to any one of items 4. 6. A first electro-optical panel, a second electro-optical panel, a signal line for controlling or driving the first electro-optical panel, and a signal line for controlling or driving the second electro-optical panel. An electro-optical device having a shared signal line that also serves as a. 7. A first driving the first electro-optical panel
A first signal line that supplies a first signal to the first driving unit as the signal line, and a second driving unit that includes a driving unit and a second driving unit that drives the second electro-optical panel. The second optical signal line for supplying a second signal to the electro-optical device according to claim 6. 8. The electro-optical device according to claim 7, wherein the shared signal line is a display data signal line for transmitting display data to the first driving unit and the second driving unit. 9. The wiring member common to the first liquid crystal panel and the second liquid crystal panel is connected, and the signal line is provided on the wiring member. The electro-optical device according to claim 1. 10. A switching signal for sending a switching signal to the first signal line and the second signal line to determine which of the first drive means and the second drive means is to be operated or is not to be operated. The electro-optical device according to any one of claims 7 to 9, wherein a line is included. 11. The display surface of the first electro-optical panel and the display surface of the second electro-optical panel are arranged such that the first electro-optical panel and the second electro-optical panel overlap each other in plan view. 11. The electro-optical device according to claim 1, wherein the electro-optical device is configured on the opposite side of the front and back sides. 12. The electro-optical device according to claim 11, wherein the first electro-optical panel and the second electro-optical panel are directly or indirectly supported by a common support. 13. The method according to any one of claims 1 to 12.
2. An electronic device comprising: the electro-optical device according to the item (2), and a display control unit that sends a display control signal to the electro-optical device.