JPH1165489A - Semiconductor device and information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To the semiconductor device suitable for a portable information processor which can speed up processing regarding the display of a liquid crystal display device and perform display processing with low power consumption. SOLUTION: The output of the memory cell 56 of a silicon substrate 52 which constitutes an RAM is connected to a pixel electrode 55 which makes a display in pixel units and when display data are written to the memory cell 56, its contents can be seen through a liquid crystal display body 51. Consequently, display data need not be transferred, so the system of the information processor can be simplified. The data transfer frequency for the display can be decreased, so the functions of the CPU, etc., are prevented put in charge of the processing to improve the throughput and also reduce the power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a semiconductor device having a display function using a liquid crystal display and an information processing apparatus.

[0002]

2. Description of the Related Art A liquid crystal display (LCD) is frequently used as a means for displaying an image. FIG. 9 shows a schematic configuration of an information processing apparatus 90 having a small display function using a developed view. The information processing device 90 includes an upper case 13 having a display window 11 and operation buttons 12, and a lower case 14 overlapping the upper case 13 to form a storage space.
And a battery 15 and a circuit board 16 are housed therein. Further, a liquid crystal panel (LCD panel) 17 is disposed above the circuit board 16 so as to overlap with the circuit board 16.
Connected through. An electrode 19 for connecting the operation button 12 and the connection member 18 is provided on the circuit board 16,
Components for connection, such as an external connector 23, and a plurality of control chips, for example, a one-chip CPU 20, a RAM
21, an LCD controller 22 and a display RAM 24 are mounted.

FIG. 10 shows a schematic configuration of an LCD panel 17 using a cross section. In the LCD panel 17, a driver 3 and a pixel electrode 2 connected to the driver 3 are provided on a glass plate 1 serving as a base, and a region of the pixel electrode 2 is a region where an image can be displayed. In a displayable region, a transparent electrode 6 and a glass plate 7 are laminated with a gap filled with liquid crystal 5 opened by a spacer 4, and a polarizing plate 8 is further superimposed on the surface.

[0004] FIG. 11 shows a schematic configuration of an information processing apparatus 90. The information processing apparatus 90 includes a one-chip CPU 20 mounted on a circuit board 16 and a CPU 25, an RO.
M26, a communication interface 27 and an input interface 28 are mounted, and these are connected by a CPU bus 29. The CPU bus 29 further includes a RAM
21 and an LCD controller 22 are also connected.
The CPU 25 performs various processes by reading and executing a program on the ROM 26. For example, CPU 25
Acquires external data from the communication line 30 via the communication connector 23 connected to the communication interface 27 and stores the data in the RAM 21. Then, the CPU 25 performs processing based on the stored data. The data is displayed by operating the operation keys 12 and the like as an input device connected to the input interface 28. CP
U25 reads the data stored in the RAM 21 and
By writing to the CD controller 22, the LCD controller 22 once saves the data in the display memory 24, and transfers the data to the LCD unit 17 at the same time. When the driver 3 having the memory function is employed, the data transferred to the LCD unit 17 is temporarily held in the driver, and the display is advanced by driving the pixel electrode 2 periodically.

FIG. 12 shows a schematic configuration of a compact personal computer (personal computer PC) 91 as an information processing apparatus for performing graphic display. The RAM 21 as a main memory is connected to the CPU 25 via a memory controller 34, and the display controller 32 is connected to the same bus 33 as the RAM 21. RA
Of course, a configuration in which the memory controller 34 is omitted so that high-speed data transfer can be performed at the speed of the CPU 25 with respect to M21 is also possible. The CPU 25 reads the data stored in the RAM 21 and writes display data to the display memory 31 via the display controller 32. Next, the display controller 32 operates the display memory 31 for each display cycle.
, And transfers the data to the display panel 17. Then, the driver 3 of the display panel 17 sequentially drives the pixel electrodes 2 according to the driving method.

[0006]

As described above, in order to display an image using an LCD, display data is temporarily stored on a memory device made of a semiconductor such as a RAM or a display memory, and is actually stored on an LCD panel. In order to display, the display data needs to be transferred to the LCD panel by the CPU or the display controller. Therefore, even if the processing for simply displaying the display data on the LCD panel is the CP
The function of U is split. In addition, since power is consumed by the CPU and the display controller only for transferring data to the LCD, power consumption cannot be reduced. A display controller is provided to reduce the load on the CPU and reduce the power consumption to some extent. However, since the CPU accesses the display memory via the display controller, the processing speed does not increase, and a sufficient effect is obtained. Can not do.

As disclosed in Japanese Patent Application Laid-Open No. 58-23091, an active matrix type LCD in which liquid crystal pixels have a memory function has been devised in recent years, and when display data is changed. Alternatively, the display data may be transferred only at an appropriate timing that requires a screen refresh, so that power consumption can be suppressed. However, when the display data is changed, the display data in another memory device needs to be transferred to the LCD panel by the CPU or the display controller, and the power consumption reduction efficiency is not so high.

Accordingly, it is an object of the present invention to provide a semiconductor device capable of displaying display data on an LCD panel at high speed and reducing power consumption. It is another object of the present invention to provide a semiconductor device having a display function capable of high-speed processing with low power consumption suitable for a small and compact information processing device suitable for carrying, such as an arm-mounted type or a notebook type.

[0009]

For this reason, in the semiconductor device of the present invention, a liquid crystal display device is formed by using a semiconductor substrate having a RAM so that display data written in the RAM can be displayed on the LCD as it is. I have to. That is, the semiconductor device of the present invention is a semiconductor device having a semiconductor substrate in which a memory region is formed at least in part, wherein at least one of a plurality of memory cells in the memory region is at least part of the surface of the semiconductor substrate. It is characterized in that it is connected to each of a plurality of pixel electrodes in a provided display area. Therefore, a semiconductor device having a display function can be provided by stacking a liquid crystal display in a display region.

In the semiconductor device of the present invention, since a memory region is formed on a silicon semiconductor substrate like a conventional RAM, data can be written or read at a speed similar to that of an SRAM or a DRAM. is there. Further, when data is written in the memory cell connected to the pixel electrode, the data can be visually seen from the outside through the liquid crystal display layer. Therefore, the contents can be displayed on the LCD simply by writing the display data into the memory. Therefore, the process of transferring the display data from the RAM to the LCD panel or the display memory becomes unnecessary, and the process of transferring the display data using the CPU can be omitted. This results in very fast display speeds,
Further, power consumption can be reduced. Further, circuits and components related to display control such as a display controller and a display memory can be omitted.

Further, since the LCD can be directly controlled for each pixel by the memory cell, a driver device provided on the LCD panel is not required. Therefore, circuit elements around the LCD can be significantly reduced, so that a semiconductor device having a small and compact display function and an information processing device using the same can be provided. In addition, the circuit elements around the LCD are taken into the pixels, thereby greatly reducing
Since the power for driving the driver device is also reduced,
A power-saving semiconductor device and an information processing device having a display function can be provided.

Further, since the pixel electrode is provided on the semiconductor substrate, a semiconductor manufacturing process capable of fine processing can be applied, and a small, high-resolution display using liquid crystal is provided at a low price. can do. Furthermore, by utilizing a semiconductor manufacturing process, it is possible to arrange a pixel electrode so as to overlap a memory area. Therefore,
At least part of the memory area and at least one of the display areas
A smaller and more compact semiconductor device can be provided by disposing the parts so as to overlap with each other. In addition, since the pixel electrode can be used as a reflection plate of the liquid crystal display layer, an LCD panel that is small and easy to assemble can be provided.

Further, it is also possible to provide a drive circuit for each pixel in the memory cell using a semiconductor manufacturing process, and to supply sufficient power by connecting the pixel electrode to the memory cell via a drive device. In both cases, processing such as polarity inversion can be performed. In the case of a static RAM, refreshing is not necessary, so that only the address at which data has changed need be rewritten, and the power consumption can be extremely small.

As described above, since the semiconductor device of the present invention has a function as a memory and a function as a display, a CPU area is provided on this semiconductor substrate and a bus is provided, or a memory controller area is provided. By connecting via a single chip, a one-chip high-performance semiconductor device having a function of low-power consumption and high-speed display can be provided. Further, the display device can be provided as a display semiconductor device independent of a CPU or the like, and a small information processing device capable of high-speed display with low power consumption can be provided by being connected to a CPU or the like.

A plurality of active elements for liquid crystal display may be provided on a semiconductor substrate, and a memory-type interface capable of connecting each of the plurality of active elements to a static RAM memory cell may be provided. It is possible. As described above, by providing a semiconductor device having only an active element without a read function among functions as a memory element, a circuit scale per pixel can be reduced, so that fine processing is not required, and manufacturing is facilitated. . Therefore, a semiconductor device having a large-size display function at low cost can be provided. Further, since the conventional static RAM can be used as the memory as it is, the system of the information processing apparatus can be constructed at a low price with little design change.

A semiconductor device having a display control area having only such a writing function can also be connected in parallel to a static RAM area provided on the same semiconductor substrate or to a static RAM and CPU of another unit. Since the display data written to each memory cell in the RAM is written as it is to the active element corresponding to the memory cell in the display control area, the display data can be visually recognized from the outside as it is. Therefore,
Since the display data in the RAM is displayed on the LCD, dynamic data transfer is not required, and high-speed image display with low power consumption can be performed in the same manner as described above.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of an information processing apparatus 10 having a small display function according to the present invention using a development view. The information processing apparatus 10 includes an upper case 13 having a display window 11 and an operation button 12, and a lower case 14 overlapping the upper case 13 to form a storage space, in which a battery 15 and a display function are provided. Is accommodated. further,
A connection member 18 using anisotropic conductive rubber for connecting the semiconductor device 50 to the battery electrode 15 a and the connector 23 provided in the lower case 14 is housed in the cases 13 and 14.

The semiconductor device 50 has a configuration in which a liquid crystal display section 51 having a liquid crystal layer and a semiconductor substrate 52 are stacked, and the semiconductor substrate 52 includes a CPU 25, a ROM 26, a communication interface 27, an input interface 28, and the like. Circuit blocks for realizing each function are formed. Further, on the semiconductor substrate 52, a display region 5 in which a plurality of pixel electrodes for controlling display in pixel units are arranged in a matrix.
3 is provided, and a memory area 54 having a function as a RAM is provided therebelow.

FIG. 2 shows a schematic configuration of a semiconductor device 50 of the present embodiment using a cross section. In the semiconductor device 50, a liquid crystal display layer 51 is laminated on a surface of a silicon semiconductor substrate 52 serving as a base. The liquid crystal display layer 51 has a display area 5
3 is provided with a transparent electrode 6 and a glass plate 7 which are stacked with a gap filled with liquid crystal 5 with a spacer 4 therebetween, and a polarizing plate 8 which is stacked thereon.

FIG. 3 shows a further enlarged configuration of the semiconductor device 50. The surface of the semiconductor substrate 52 made of silicon is a display region 53 on which a pixel electrode 55 is formed, and the lower layer is a memory region 54 in which circuit elements such as transistors are formed in the semiconductor substrate. The memory area 54 is divided into an area 54a as a main memory and an area 54b as a display memory, and a pixel electrode 55 is connected to each memory cell 56 of the display memory 54b. Since one pixel is formed by sandwiching the liquid crystal layer 5 between the pixel electrode 55 and the transparent common electrode 6, each memory cell 56 of the display memory 54b is formed.
The state of the corresponding pixel changes according to the data stored in the memory 54, and the display data written in the memory 54 can be visually grasped from the outside via the liquid crystal display 51.
That is, the memory cell 5 connected to the pixel electrode 55
By allocating the address of No. 6 as a memory area of the display data of the RAM 54, an image can be displayed on the liquid crystal display body 51 only by writing the display data to the RAM 54.

Further, in the semiconductor device 50 of this embodiment, since the liquid crystal display 51 is disposed on the silicon substrate 52, a reflection type liquid crystal display is formed. Therefore, by making the pixel electrode 55 of each pixel an appropriate area and shape,
A function as a reflector can be added, and a bright and easy-to-see liquid crystal display can be performed.

FIG. 4 shows a circuit configuration of each memory cell 56. The memory cell 56 of the present example has a static R by an inverter 61a, 61b, and 61c for writing and holding data, a holding capacitor 63, and an inverter 62 for reading held data.
A memory element 67 functioning as an AM is realized. Further, the output of the memory element 67 is a low-frequency (several tens Hz) frame clock 64a for polarity inversion.
Thus, the liquid crystal 5 is input to a drive circuit (exclusive OR gate) 64 capable of AC driving, and the output of the drive circuit 64 is supplied to the pixel electrode 55. Therefore, the active element 68 having a storage function for driving the liquid crystal 5 based on the input display data is provided by the inverters 61a, 61b and 6 capable of writing the display data.
1c and a drive circuit 64 for AC driving, and can include a storage capacitor 63 as necessary.

Further, the memory cell 56 of the present embodiment has an input circuit (input element) 6 having a photodiode 65.
9 is provided, and image data can be input using a space on the liquid crystal panel.

FIG. 5 shows a schematic configuration of the information processing apparatus 10 of the present embodiment. In the information processing apparatus 10, a CPU 25, a ROM 26, a communication interface 27, and an input interface 28 are mounted on a semiconductor device 50 housed in a case, and these are connected by a CPU bus 29. Further, the semiconductor device 50 is provided with a memory type display section 59 by a display area 53 and a liquid crystal display layer 51 arranged so as to overlap the RAM area 54, and is connected to the CPU bus 29. The CPU 25 reads a program from the ROM 26, acquires external data from the communication line 30 via the communication connector 23 connected to the communication interface 27, and performs processing such as storing the data in the RAM 54.

Display of data in the information processing apparatus 10 of this embodiment is performed when data is written into the display area 54b of the RAM 54 by the CPU 25. That is, the data stored in the display memory 54b of the RAM 54 is stored in the memory area 56 of the display memory 54b.
Are connected in pixel units to the pixel electrode 55
Displayed when data is stored in M54. As described above, since the RAM for accumulating the display data and the pixel electrode for performing the display for each pixel are connected one-to-one, the RAM or the semiconductor memory such as the display memory can be connected to the RAM in a conventional manner.
It is not necessary to perform a process of transferring data to the CD unit, and therefore, it is possible to prevent the capacity of the CPU from being devoted or the power from being consumed. Also, since the display data is displayed on the liquid crystal display layer 51 when the display data is stored in the RAM 54,
The display processing speed is also very fast.

Further, as in the semiconductor device 50 of this embodiment,
All function blocks such as a CPU are formed on a silicon substrate 52 in accordance with the evolution of the semiconductor process, and a memory type display section such as a memory function 67 and a drive circuit (buffer) 64 of the present invention is provided on a part of the substrate 52. It is possible to configure all 59 circuits. Therefore, almost all functions of the information processing apparatus can be stored in one semiconductor device 50, and an information terminal function can be realized by connecting a power supply and an operation function to the silicon substrate. Therefore, since a circuit board can be omitted, downsizing and weight reduction can be achieved, and assembling is simplified, so that a small and high-performance information processing terminal can be supplied at a low price. Further, since the memory-type display portion 59 can be formed using a semiconductor process capable of fine processing, a small-sized and high-resolution display device can be realized. Of course, the information processing terminal can be configured by mounting the CPU, the ROM, and the plurality of chips each having the function as the memory type display unit of the present invention on the circuit board shown in FIG.

FIG. 6 shows an example of a memory map of the CPU. The CPU 25 operates the RAM 54 by software operation.
There is no significant difference from the conventional information processing device when accessing on a memory map when accessing the information processing device. In the case of an information processing apparatus capable of displaying image data (bright), display data is often mapped on a memory, and is processed by a method of writing (transferring) data to an area arranged in a memory space. Therefore, when a part of the area 54b of the RAM 54 is allocated to the display memory, the display data is written to the display data area 54b in the area of the RAM 54 on the memory map in the information processing apparatus 10 of the present embodiment as in the related art. The other data is written to the area of the main memory 54a.

However, the hardware connection is different,
In this example, as described above, the display data area 54
When written in b, the display is performed as it is. On the other hand, in the conventional information processing apparatus 90 shown in FIG.
U writes display data to the LCD controller, and is displayed after the data is transferred from the LCD controller to the LCD unit. In the information processing apparatus 91 shown in FIG. 12, the CPU writes the data in the display memory via the display controller, and the data in the display memory is displayed after the display controller transfers the data to the LCD unit (display panel). Therefore, the processing time until the image is actually displayed on the liquid crystal display is long, and a correspondingly large amount of power is consumed. Further, since the destination where the CPU writes the display data is not the RAM which can be accessed at high speed, the processing time is long and the power consumption is also large.

On the other hand, in the semiconductor device 50 of the present embodiment, the display data may be written in the static RAM 54.
There is no need for access unless the display data changes. Further, when the memory function 67 is configured by CMOS, static driving is performed during a period in which a frame signal (clock) does not change, and further, processing from writing to the memory 54 to processing to be displayed is performed on the same silicon substrate. In addition, the driving voltage and the operation speed can be reduced as compared with the case where the display is performed on a conventional LCD including TFTs or the like using a display controller or the like, and the display can be performed with very little power consumption. As described above, by using the semiconductor device 50 of this example, a display controller and a driver device mounted on an LCD panel are not required, and all circuits related to the liquid crystal display can be configured on a silicon substrate. Is possible. Further, since these circuits and circuit blocks are not required, the size and weight of the semiconductor device and the information processing device can be significantly reduced.

[Second Embodiment] FIG. 7 shows a different embodiment according to the present invention. The information processing apparatus 10 of the present embodiment uses a semiconductor device 50 having only a function as an active element 68 that can hold input display data and drive the liquid crystal 5 as a display control function. The device 50 is the memory controller 34
Are connected in parallel with a general-purpose static RAM 21. The semiconductor device 50 of the present example can be regarded as a write-only memory type display device having no read function as compared with the semiconductor device described in the first embodiment. Therefore, the semiconductor device 5 of the present example
0 is the interface 21a of the static RAM 21
The same memory type interface 50a as
At least the number of active elements 68 corresponding to the display data area of the RAM 21 is provided. Therefore,
The CPU 25 is connected to the RAM 2 via the memory controller 34
When the display data is written in one display data area, the same data is written in the active element 68 of the semiconductor device 50 and is displayed on the liquid crystal display 51 as it is by the pixel electrodes 55 corresponding to one to one. On the other hand, at the time of reading, data is read from the general-purpose static RAM 21 and supplied to the CPU 25 via the memory controller 34.

Memory function 6 as static RAM
If the function as the drive circuit 64 is added to the circuit 7, the circuit scale becomes large, so that fine processing in pixel units is required.
The cost of a large-sized semiconductor device increases, for example, the yield decreases when microfabrication is performed. On the other hand, in the semiconductor device 50 of the present example, the circuit scale can be reduced by restricting functions only for writing, and a relatively large-sized semiconductor device can be manufactured at low cost without using fine processing. can do. Therefore, a semiconductor device having a large display screen can be provided. Further, by connecting in parallel with a general-purpose RAM, a function equivalent to that of the semiconductor device having a memory function described in the above embodiment can be realized. Further, by using a general-purpose RAM, hardware-related design changes from the conventional information processing apparatus are reduced, and it can be realized at low cost.

In the information processing apparatus 10 of this embodiment, the RA
The memory cells of the display memory on M are connected to the display pixels (pixel electrodes) substantially one to one, and the display memory is a part of the RAM. Therefore, a display controller and a driver for an LCD panel are not required. In addition, since the display memory is directly connected to the CPU via the bus (the memory controller in this example), writing to the display memory at high speed becomes possible. The data written in the display memory does not need to be retransmitted because the memory cells are connected for each pixel, and thus the circuit does not operate, so that power consumption can be reduced. Further, when writing from the CPU to the display memory, there is no need to be aware that the access speed of the display memory is low, and since the data is directly connected to the display at the time of writing to the display memory. The data bus from the CPU to the display becomes very short and the number of internal signals increases, but the functional circuit configuration can be simplified.

As described in the above embodiment, in the semiconductor device of the present invention, all circuits for performing liquid crystal display can be formed on a silicon substrate. Therefore, when microfabrication is used, various processing circuits can be provided for each pixel, and a circuit 69 for capturing an image can be added as described above. In a conventional liquid crystal display device,
The LCD driver circuit is configured by mounting an LCD driver manufactured on a silicon substrate on glass on which electrodes are formed. However, in the semiconductor device 50 of this example, a memory function or a write-only memory function is provided. A drive circuit (buffer) is formed for each pixel on a silicon substrate, and a function corresponding to a conventional driver is realized by one semiconductor device together with a function of holding display data.

As shown in FIG. 8A, it is also possible to assemble the information processing apparatus 10 by mounting the semiconductor device 50 of this embodiment on a glass substrate 71. By mounting the operation button electrode 19 and the battery electrode 15a on the glass substrate 71, it is possible to provide a simpler information processing terminal 10.

[0035]

As described above, in the semiconductor device of the present invention, the CPU and the memory cells of the RAM capable of transferring data at high speed are connected to the pixels of the liquid crystal display in a one-to-one correspondence. When the display data is written into the RAM, the contents can be viewed through the liquid crystal display. Therefore, the system constituting the information processing apparatus can be simplified, and the functional blocks related to display can be integrated in the semiconductor device, so that the number of components can be significantly reduced. Further, since the number of times of data transfer for display can be reduced, it is possible to prevent a function such as a CPU from being divided for the processing, thereby improving the processing capability and reducing the power consumption. Therefore, it is possible to provide an information processing apparatus having a display function of a small size and low power consumption suitable for carrying such as an arm-mounted type.

[Brief description of the drawings]

FIG. 1 is a development view showing a configuration of an information processing apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of the semiconductor device shown in FIG.

FIG. 3 is an enlarged sectional view showing a configuration of the semiconductor device shown in FIG. 2;

FIG. 4 is a diagram showing a circuit configuration of a memory cell of the semiconductor device shown in FIG. 1;

FIG. 5 is a block diagram illustrating a functional configuration of the information processing apparatus illustrated in FIG. 1;

6 is a diagram showing a memory map of the CPU shown in FIG.

FIG. 7 is a block diagram illustrating a functional configuration of an information processing apparatus according to a second embodiment of the present invention.

FIG. 8A is a developed view showing an information processing apparatus according to another embodiment of the present invention, and FIG. 8B is a view showing an appearance of the information processing apparatus.

FIG. 9 is an expanded view of a configuration example of a conventional information processing apparatus.

FIG. 10 illustrates an L used in the information processing apparatus illustrated in FIG. 9;
It is sectional drawing which shows the structure of a CD panel.

FIG. 11 is a block diagram illustrating a functional configuration of the information processing apparatus illustrated in FIG. 9;

FIG. 12 is a block diagram showing a different example of the conventional information processing apparatus.

[Explanation of symbols]

 Reference Signs List 4 spacer 5 liquid crystal layer 6 transparent electrode (common electrode) 7 glass 8 polarizing plate 10 information processing device 12 operation button (operation switch, input device) 13, 14 case 50 semiconductor device 51 liquid crystal display layer 52 semiconductor substrate 53 display area 54 memory Area 55 Pixel electrode 56 Memory cell 64 Drive circuit 67 Memory element 68 Active element 69 Input element

Claims (14)

[Claims] 1. A semiconductor device having a semiconductor substrate having a memory region formed in at least a part thereof, wherein at least a part of a plurality of memory cells in the memory region is provided on at least a part of a surface of the semiconductor substrate. A semiconductor device connected to each of the plurality of pixel electrodes in the display area. 2. The semiconductor device according to claim 1, wherein a liquid crystal display is stacked in the display area. 3. The semiconductor device according to claim 1, wherein at least a part of the memory area and at least a part of the display area overlap each other. 4. The semiconductor device according to claim 1, wherein the pixel electrode has a function as a reflector of a liquid crystal display laminated on the display area. 5. The semiconductor device according to claim 1, wherein the pixel electrode is connected to the memory cell via a driving device formed in the semiconductor substrate. 6. The semiconductor device according to claim 1, wherein said memory area is a static RAM. 7. The semiconductor device according to claim 1, wherein C
A PU area is provided, and the memory area and the CP
A semiconductor device, wherein the U region is connected via a bus or via a memory controller region on the semiconductor substrate. 8. A semiconductor device having a semiconductor substrate in which a display control region including a plurality of active elements for liquid crystal display is formed at least partially, wherein each of the plurality of active elements and a memory cell of a static RAM A memory type interface similar to a static RAM that can be connected correspondingly, wherein the plurality of active elements are respectively provided for a plurality of pixel electrodes of a display region provided on at least a part of a surface of the semiconductor substrate. A semiconductor device connected to the semiconductor device. 9. The semiconductor device according to claim 8, wherein a liquid crystal display is stacked in the display area. 10. The semiconductor device according to claim 8, wherein at least a part of the display control area and at least a part of the display area overlap each other. 11. The semiconductor device according to claim 8, wherein the pixel electrode has a function as a reflector of a liquid crystal display laminated on the display area. 12. The semiconductor device according to claim 8, wherein a CPU area and a static RAM area are provided on the semiconductor substrate, and the static RAM area and the display control area are connected to the CPU area via a bus or the semiconductor area. A semiconductor device connected via a memory controller area on a substrate. 13. The semiconductor device according to claim 1, further comprising:
U, wherein the CPU and the memory area are connected via a bus or a memory controller. 14. The semiconductor device according to claim 8, further comprising:
An information processing apparatus comprising a U and a static RAM, wherein the static RAM and the display control area are connected to the CPU via a bus or the memory controller.