JP2003098544A - Liquid crystal display devices and display devices - Google Patents

Abstract

(57) [Problem] To provide a liquid crystal display device which is provided with an icon display portion and a dot matrix display portion and which has been reduced in size. A backlight (2) is disposed on a back surface of a liquid crystal display panel which is disposed opposite to each other via a liquid crystal layer (15) and forms a display area.
And a dot matrix display section 3 and an icon display section 4 are provided in the display area of the liquid crystal display panel, and a dot matrix display section and an icon display section are provided on the back surface of the liquid crystal display panel corresponding to the icon display section 4. Drive I for
A liquid crystal display device 23 in which C7 is mounted, the icon display unit 4 is of a reflection type display, and the dot matrix display unit 3 is of a transflective type display.

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 having an icon display section and a dot matrix display section in a display area. Further, the present invention relates to a display device provided with the liquid crystal display device of the present invention.

[0002]

2. Description of the Related Art In electronic devices such as mobile phones, personal information terminals or order entry terminals, a monochrome liquid crystal display element has been the center of the prior art, but in recent years, there has been a trend toward colorization capable of increasing the amount of information. Is increasing.

Further, in addition to the normal display area, an area for displaying an icon for displaying a power-on state, an operation mode or a specific message is provided.

In addition, in the liquid crystal display element for the purpose of emphasizing portability, downsizing, low power consumption, and applicability for outdoor use are required.

In order to meet such market needs, a reflective color liquid crystal display device using a color filter has been proposed, and this device will be described with reference to FIGS. 5 and 6.

FIG. 5 shows a liquid crystal display device 1 used in a mobile phone.
FIG. 6 is a cross-sectional view showing an example of the color liquid crystal display device 2 when the liquid crystal display device 1 is used for color display.

According to the liquid crystal display device 1 shown in FIG. 5, a dot matrix display section 3 and an icon display section 4 are provided on the display screen.

The dot matrix display unit 3 is a simple matrix type display system, and is composed of a stripe-shaped signal electrode group 5 and a stripe-shaped scanning electrode group 6, and both electrode groups 5 and 6 are made orthogonal to each other. It is a configuration in which they face each other.

Each pixel is a portion (dot) where the signal electrode group 5 and the scanning electrode group 6 intersect, and a drive voltage is applied to a predetermined dot between the two electrode groups 5 and 6, It is turned on / off by application, and each pixel is turned on or off according to this, and information (data) such as abbreviated telephone number, transmission dial number, and message information is displayed by an aggregate of these dots.

Further, an IC 7 for driving the signal electrode group 5 of the dot matrix display section 3 is adjacent to the IC 7, and similarly, an IC 7 for driving the scanning electrode group 6 of the dot matrix display section 3 is driven.
C8 is adjacent.

Like the dot matrix display unit 3, the icon display unit 4 is a simple matrix type display system and is composed of a stripe-shaped signal electrode group 9 and a stripe-shaped scanning electrode group 10. This is a configuration in which the electrode groups 9 and 10 are opposed to each other while being orthogonal to each other.

A portion (dot) where the signal electrode group 9 and the scanning electrode group 10 intersect becomes each pixel, and a drive voltage is applied to a predetermined dot between both electrode groups 9 and 10, It is turned on / off by application of voltage, whereby each pixel is turned on or off, and a so-called pictogram or the like is displayed by the aggregate of the dots.

For example, the mobile phone is provided with a reception sensitivity display section 11 for displaying the reception sensitivity of the antenna and a battery capacity display section 12 for displaying the remaining capacity of the built-in battery.

In the liquid crystal display device 1 provided with the dot matrix display portion 3 and the icon display portion 4 as described above, a concrete colorized structure will be described with reference to the color liquid crystal display device 2 shown in FIG.

Two transparent substrates 13 and 14 are arranged so as to face each other, and a liquid crystal layer 15 is sealed between them by a sealing material 16 arranged in a frame shape to form a liquid crystal cell.

On the inner surface of the transparent substrate 13, a signal electrode group 9 for displaying an icon and a signal electrode group 5 for a dot matrix display are formed of ITO or the like, and an alignment film (not shown) is formed thereon. ) Is formed and the rubbing process is performed in a predetermined direction. Further, a polarizing plate 17 is arranged on the outer surface of the transparent substrate 13. A polarizing film, a retardation film or the like may be provided instead of the polarizing plate 17.

On the other hand, in the transparent substrate 14, the light semi-transmissive layer 1 made of a metal such as Al, Cr, or Ag is formed on the inner surface thereof.
8 and a color filter layer 19 (which is a colored layer composed of three layers of red (R), green (G), and blue (B) arranged side by side) are sequentially laminated, and ITO or the like is formed on the color filter layer 19. The scan electrode group 10 for displaying the icon and the scan electrode group 6 for the dot matrix display portion formed in 1 are formed. The signal electrode group 5 and the scanning electrode group 6 of the dot matrix display section 3 are arranged so as to be orthogonal to each other.

Then, the scan electrode group 1 of the icon display section 4
An alignment film (not shown) is formed on the scanning electrode group 6 of the dot matrix display unit 3 and 0.

According to the color liquid crystal display device 2 having the above-mentioned configuration, the icon display section 4 and the dot matrix display section 3 are provided on the display screen, and they are driven simultaneously or separately in a time division manner. In order to display both, a voltage is applied between the signal electrode group 5 and the scanning electrode group 6 in the dot matrix display section 3, and a voltage is applied between the signal electrode group 9 and the scanning electrode group 10 in the icon display section 4. By applying a driving voltage to each dot, an electric field is generated in the liquid crystal layer 15 to turn it on / off, and information (data) such as message information is displayed.

The scanning electrode group 10 of the icon display section 4 is FP
IC (not shown) driven via C (not shown)
Further, the signal electrode group 9 of the icon display unit 4 is connected to an IC (not shown) that drives the signal electrode group 9 via an FPC (not shown) or the like.

Further, instead of such an IC connection structure,
A technique has been proposed in which the signal electrode group 9 of the icon display section 4 and the signal electrode group 5 of the dot matrix display section 3 are made common to omit the drive circuit of the icon display section and to reduce the space other than the display area. (Japanese Patent Laid-Open No. 2000-10
530).

Furthermore, this color liquid crystal display device 2 is of the COG mounting type, and the signal electrode group 5 of the dot matrix display portion 3 is extended to the non-display area of the transparent substrate 13, but in this non-display area. Signal electrode driving I for driving the signal electrode group 5 of the dot matrix display portion 3
C7 is directly mounted on the transparent substrate 13 via an adhesive resin such as an epoxy resin.

The signal electrode driving IC 7 is connected to the electrode terminal portion 2 by a bonding wire 20 made of Al, Au or the like.
Connected with 1. Further, a resin 22 for protecting the driving IC 7 and the bonding wire 20 from an external force is coated.

There has also been proposed a face-down bonding method in which a driving IC is directly formed on a connection terminal without using a bonding wire, or a technique of mounting the IC by a TAB method.

[0025]

However, COG
In the mounting method, the driving IC is mounted in the non-display area of the glass substrate and the wiring is performed, so that the frame portion is widened and it is not possible to meet the demand for miniaturization.

According to the liquid crystal display device disclosed in Japanese Unexamined Patent Publication No. 2000-10530, space is saved, but on the other hand, signal driving is performed around the icon display area and the dot matrix display area. Since the ICs for scanning and the driving ICs for scanning are arranged, it is necessary to secure an area for mounting the driving ICs on at least one side of the peripheral portion of the icon display area and the peripheral portion of the dot matrix display area.
It can be said that it is difficult to achieve further miniaturization.

Moreover, in the liquid crystal display device of Japanese Patent Laid-Open No. 2000-10530, the icon display area is a static drive display, and only limited information such as so-called pictogram display is displayed, and the functionality is insufficient. .

The present invention has been completed in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device which has an icon display section and a dot matrix display section and is further miniaturized.

Another object of the present invention is to provide a high-performance display device equipped with the liquid crystal display device of the present invention.

[0030]

A liquid crystal display device according to the present invention is a liquid crystal display panel in which a pair of substrates in which an electrode and an alignment film are sequentially formed are opposed to each other via a liquid crystal layer to form a display area. The liquid crystal display panel is provided with a backlight disposed on the back surface thereof, and a dot matrix display section and an icon display section are further provided in the display area of the liquid crystal display panel, and
A drive IC for the dot matrix display section and / or for the icon display section is mounted on the back surface of the liquid crystal display panel corresponding to the icon display section, and the icon display section is a reflection type display. It is characterized by a semi-transmissive display.

The display device of the present invention is characterized by using the liquid crystal display device of the present invention.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view of the liquid crystal display device 23 as viewed from the display side, showing the arrangement of the dot matrix display section and the icon display section. FIG. 2 is a schematic cross-sectional view of the liquid crystal display device 23, which is a cross-sectional view taken along a section line in the X-axis direction in FIG. 3 is a schematic plan view of the display panel of the liquid crystal display device as viewed from the back side, and FIG. 4 is a schematic cross-sectional view taken along the line Y-axis in FIG. The same members as those in the liquid crystal display device shown in FIGS. 5 and 6 are designated by the same reference numerals.

In the liquid crystal display device 23 shown in FIGS. 1 and 2, reference numerals 13 and 14 denote transparent substrates as the pair of substrates, which are made of a glass material or synthetic resin, and between the transparent substrates 13 and 14. For example, a liquid crystal layer 15 made of a chiral nematic liquid crystal twisted at an angle of 200 to 270 ° is sealed by a frame-like sealing material 16, and thus a liquid crystal display panel is formed. A backlight 24 having a light source such as a cold cathode tube is arranged.

According to this liquid crystal display panel, the dot matrix display section 3 and the icon display section 4 are provided in the display area.
And are provided.

On the inner surface of the transparent substrate 13, a group of signal electrodes 26 made of ITO or the like is arranged in a stripe pattern, and this serves as signal electrodes for both icon display and dot matrix display. An alignment film (not shown) made of a polyamide resin or the like is formed on it, and a rubbing process is performed in a predetermined direction.

A polarizing plate 1 is provided on the outer surface of the transparent substrate 13.
7 are provided, for example, TN (twisted nematic) mode, STN (super TN) mode, D-ST
They are arranged in a predetermined direction according to an operation mode such as N (double-STN) mode or a type of normally white mode / normally black mode.

On the other hand, on the inner surface of the transparent substrate 14, a light semi-transmissive layer 18 and a color filter layer 19 are sequentially laminated, and on the color filter layer 19, an icon made of ITO, which is a stripe-shaped transparent electrode group, is formed. The scan electrode group 10 of the display unit 4 and the scan electrode group 6 of the dot matrix display unit 3 are formed. The scanning electrode group 6 and the scanning electrode group 10 are arranged so as to be orthogonal to the signal electrode group 26.

Further, an alignment film (not shown) made of polyamide resin or the like is formed on the scan electrode group 10 and the scan electrode group 6.

The light semi-transmissive layer 18 is made of, for example, Al or C.
It is composed of a conductive metal such as r or Ag or a dielectric material in a layered form, and by increasing the layer thickness, it becomes almost light reflective,
On the contrary, it becomes semi-transmissive by making it thinner. Further, the light semi-transmissive layer 18 may have a specular property or a scattering property,
In order to have a scattering property, provide an uneven shape with resin or the like,
The light semi-transmissive layer 18 is formed thereon.

The color filter layers 19 are arranged in stripes, and a large number of red (R) colored layers are arranged along the columns of pixels. Similarly, a large number of green (G) colored layers and a large number of blue (B) colored layers are formed. The layers are repeatedly arranged in that order. Then, one pixel of the dot matrix display portion 6 and the icon display portion 10 is represented by three dots of R, G and B.

Further, on the outer surface of the transparent substrate 14, a polarizing plate 2 is provided at a portion corresponding to the dot matrix display portion 3.
7 are provided.

According to the color liquid crystal display device 23 having the above construction, the icon display section 4 and the dot matrix display section 3 are provided on the display screen, and they are driven simultaneously or separately in a time division manner. In order to display both, a voltage is applied between the signal electrode group 26, which is also used for both the icon display and the dot matrix display, and the scanning electrode group 6 and the scanning electrode group 10. By applying a drive voltage to the dots, an electric field is generated in the liquid crystal layer 15 to turn ON / O.
FF and display information (data) such as message information.

The liquid crystal display device 2 having such a configuration
3, the thickness of the light semi-transmissive layer 18 is increased so that the light semi-transmissive layer 18 becomes substantially light-reflecting, whereby the icon display portion 4 can be made a reflection type display.

Incidentally, the area used as a reflection type has a small number of scanning lines in the icon display section and is driven by a low duty, whereby a sufficient reflectance can be secured as a reflection type display, and the icon display section is separately driven. given that,
Since the contrast is high, the visibility is ensured even in an outside light environment with a small amount of light.

On the other hand, by making the layer thickness of the light semi-transmissive layer 18 small, it becomes light semi-transmissive, and functions of both reflective display and transmissive display can be obtained, resulting in a semi-transmissive display. In the case of transmissive display, the backlight 24 is used.

Next, the mounting structure of the driving IC in the liquid crystal display device 23 of the present invention will be described with reference to FIGS.

The signal side driving IC 7 is fixed near the end of the transparent substrate 14 with an epoxy adhesive resin or the like (not shown). According to FIG. 4, the signal side driving IC 7 is arranged in the vicinity of the sealing material 16, but the present invention is not limited to this. It may be a part.

The output terminal of the signal side driving IC 7 is a connecting terminal 21 provided on the signal transparent electrode group 26 shared by the dot matrix display section 3 and the icon display section 4.
And a bonding wire 20 made of Al, Au, etc.
Connected via.

The connection terminal 21 is connected to the bonding wire 20 by forming a conductive metal such as Al, Cr, Ag or the like using a sputtering device or the like.

On the outer surface of the polarizing plate 27, a glass, a synthetic resin, an adhesive layer (not shown) having a light transmitting property,
A transparent substrate 28 made of ceramics or the like is attached, and a wiring pattern 29 made of ITO or the like is provided on the outer surface of the transparent substrate 28.

The bonding wire 20 made of Al, Au or the like is provided between the connection terminal 30 provided on the wiring pattern 29 and the terminal of the signal side driving IC 7.
Connected by. This connection terminal 30 is also made of Al, Cr,
A conductive metal such as Ag is formed by using a sputtering device or the like.

At the other end of the wiring pattern 29, a conductive connecting tape such as anisorum is used to connect the FPC3.
1 is pasted, and signals from the external liquid crystal drive circuit device are F
Signal side driving I through the PC 31 and the wiring pattern 29
Input to C7.

On the other hand, the scanning side driving ICs 32 of the icon display section 4 and the dot matrix display section 3 are previously mounted on the FPC 33 by wire bonding or flip chip based on the COF method.
The dot matrix display section scanning electrode group 6 and the icon display section signal electrode group 10 on the transparent substrate 14 are connected to each other via a conductive connecting tape (not shown) such as anisolum. The signals from the external liquid crystal drive circuit device are supplied to the FPC 33 to be supplied to the scanning side drive IC 32.
It is supplied from the input side terminal of. Instead of this COF method, a similar TAB mounting method may be used.

Scanning side driving ICs are separately provided for the icon display section 4 and the dot matrix display section 3.
It is also possible to separately drive by providing the above, and thereby to drive at a lower duty, and as a result, optical characteristics such as contrast and response speed may be improved.

Alternatively, the scanning side drive I of the icon display unit 4
Since C has a small circuit scale, it may be driven separately from the dot matrix display unit 3 and may not be COF mounted, but the external liquid crystal drive circuit device may have the function of the drive IC.
Furthermore, the FPC 31 and the FPC 33 may be designed to be shared by using the same member.

Thus, according to the liquid crystal display device 23 of the present invention, by making the light semi-transmissive layer 18 light-reflecting as in the above-mentioned configuration, the icon display portion 4 is made a reflective type display, and the light semi-transmissive layer is formed. By making 18 semi-transmissive to light, a semi-transmissive display having both functions of reflective display and transmissive display can be obtained. However, the signal side driving IC 7 is fixed near the back surface of the icon display section 4, and further dot By providing the wiring pattern 29 for input to the signal side driving IC 7 via the transparent substrate 28 on the back surface of the matrix display portion 3, the size can be reduced accordingly. As for the scanning side drive system, by using the COF system or the TAB system mounting, the structure is such that the frame is not increased, and in that respect, downsizing is also achieved.

The present invention is not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the scope of the present invention. For example, (1) For the polarizing plates 17 and 27, the transparent substrates 13 and 1
In providing No. 4, a retardation film may be interposed to further enhance the contrast and color tone.

(2) The above-mentioned liquid crystal display device can be applied not only to the simple matrix type, but also to an active type liquid crystal display device. In that case, both the icon display part and the dot matrix display part can be activated. Good.

(3) In the above-mentioned simple matrix type liquid crystal display device, the signal electrode group is formed on the transparent substrate 13 and the scanning electrode group is formed on the transparent substrate 14, but instead of this Then, the signal electrode group may be formed on the transparent substrate 14 and the scanning electrode group may be formed on the transparent substrate 13.
In this case, at the portion where the signal side driving IC 7 is arranged,
The scanning-side driving IC may be arranged, and the signal-side driving IC may be arranged at a portion where the scanning-side driving IC 32 is arranged.

Further, the scanning side driving IC may be arranged together with the signal side driving IC at the portion where the signal side driving IC 7 is arranged (on the back surface of the icon display portion).

(4) Further, according to the above liquid crystal display device,
Although an example in which drive ICs for the dot matrix display portion and the icon display portion are mounted on the back surface of the icon display portion has been described, instead of this, a drive IC applied to either one may be mounted. .

(5) Further, in the above-described simple matrix type liquid crystal display device, the color filter layer 19 is formed on the transparent substrate 14, but instead of this, the color filter layer is formed on the transparent substrate 13. You may.

(6) According to the liquid crystal display device 23,
Although the transparent substrate 28 is attached on the polarizing plate 27 and the wiring pattern 29 made of ITO or the like is provided on the outer surface of the transparent substrate 28, the wiring pattern 29 may be provided on the polarizing plate 27 instead. . Alternatively, a transparent and electrically insulating synthetic resin layer may be applied and formed on the polarizing plate 27, and the wiring pattern 29 made of ITO or the like may be provided on the resin layer.

(7) The backlight 24 is used for the dot matrix display section 3, but for the icon display section 4 which is a reflection type display, a front light using a white LED chip or the like is used as an auxiliary light source. May be provided.

Next, the structure of the light semi-transmissive layer 18 and the portable telephone and portable terminal as the display device of the present invention will be described.

(Regarding the light semi-transmissive layer 18) The light semi-transmissive layer 18 formed in the dot matrix display portion 3 has both the light transmissive property and the light reflective property, and moreover, between the two polarizing plates. Make sure there is no phase difference when sandwiched.

The light semi-transmissive layer 18 is a thin film made of a metal such as chromium, aluminum or silver as described above, but as the film thickness increases, the light transmissivity decreases and the light reflectivity increases. The thickness of such a metal thin film has a different light absorption coefficient depending on the type of metal, and is defined depending on which of the reflective and transmissive applications is required to have improved performance. Usually 50 to 5
00Å, preferably 100 to 400Å. As a result, the characteristics of a semi-transmissive liquid crystal display device having a reflectance of 30 to 65% and a transmittance of 15 to 50% can be obtained.

For example, the light semi-transmissive layer 18 has a film thickness of 250 Å
When the aluminum metal thin film is formed to have a thickness of, the reflectance is 65% and the transmittance is 15%.

The light semi-transmissive layer 18 may be formed of a dielectric half mirror instead of the metal thin film.
That is, a laminated structure in which the low refractive index layer and the high refractive index layer are alternately laminated in sequence may be adopted, whereby a part of the light incident through the liquid crystal layer 15 is reflected by the high refractive index layer and the other light. Light transmitted through the high-refractive index layer is reflected by the low-refractive index layer, and these reflected lights are interfered with each other, so that the reflection performance is significantly enhanced and so-called increased reflection occurs. Further, almost no light absorption (about 20% is absorbed in the visible light region in the case of an aluminum metal material) as occurs in the above-mentioned metal thin film, thereby improving both reflection performance and transmission performance. Thus, the characteristics of a semi-transmissive liquid crystal display device having a reflectance of 30 to 80% and a transmittance of 20 to 70% can be obtained.

The high refractive index layer and the low refractive index layer as described above
If there is a difference in refractive index between them,
Although it may be configured, for example, the range of the refractive index of the high refractive index layer
Is preferably 2.0 to 2.8, and TiO₂ , ZrO₂ , SnO
₂ It is good to configure with. The low refractive index layer
The range of the folding ratio is preferably 1.3 to 1.6, for example, SiO.
₂ , AlF₃ , CaF₂ , MgF₂ It will consist of
Yes.

The thickness range of the high refractive index layer is 25 to 2000.
Å By setting the thickness range of the low refractive index layer to 25 to 2000Å, the above-mentioned increased reflection becomes most remarkable. Further, by setting the thickness range of the light semi-transmissive layer 18 to be 50 to 12000Å, this increased reflection becomes remarkable.

Further, the light semi-transmissive layer 18 has a laminated structure in which low refractive index layers and high refractive index layers are alternately laminated in order,
The total number of layers is two, four, six, eight, ten or more.

Furthermore, in the case of such a laminated structure, the reflectance and the transmittance can be set as required by changing the number of laminated layers, and the design thereof is facilitated, so that the manufacturing yield is improved. It was improved and the production cost was reduced. S
consisting iO ₂ low refractive index layer (thickness: 940Å) and TiO
_In the case of a laminated structure in which a high refractive index layer consisting of ₂ (thickness: 630Å) is laminated alternately and the total number is 8 layers, the reflectance is 75% and the transmittance is 25%. .

Another example of the light semi-transmissive layer 18 will be described with reference to FIG. FIGS. 8A to 8E are plan views of respective dots,
The shaded portion is a portion which is made substantially light reflective by increasing the layer thickness, and this portion corresponds to the light semi-transmissive layer 18 used in the icon display portion 4.

In each of these figures, a part of the reflective layer is removed from each dot by using an etching technique or the like, and a light passage hole, a slit, or a hole corresponding to a blank part in the figure is provided by this.

Then, the reflectance and the transmittance of the reflective layer 10 are controlled by the area ratio between the shaded portion and the blank portion. By changing the ratio, a semi-transparent specification with emphasis on transmission or reflection is realized.

(Mobile Phone of the Present Invention) A mobile phone 34 equipped with the liquid crystal display device 23 will be described with reference to FIG. According to this mobile phone 34, the liquid crystal display device 2 is housed in a small housing 35.
3, the liquid crystal display device 23 includes a dot matrix display section 3 and an icon display section 4 in the display area. An antenna 36 for transmission and reception is provided on the upper part of the housing 35, and a receiver 37 and a microphone 38 are formed on the surface.

(Mobile Terminal of the Present Invention) A mobile terminal 39 provided with the liquid crystal display device 23 will be described with reference to FIG.

The mobile terminal 39 is shown as various information terminals other than the mobile phone 34. For example, clock, calculator,
Game console, pedometer (registered trademark), GPS, POS, handy terminal, industrial instrument, data-entry device,
There are, for example, a fish finder, but not limited to these. Also in this portable terminal 39, the liquid crystal display device 23 is arranged in the small casing 40.
Is composed of a dot matrix display section 3 and an icon display section 4 in the display area.

[0080]

As described above, according to the liquid crystal display device of the present invention, the dot matrix display section and the icon display section are provided in the display area of the liquid crystal display panel, and the liquid crystal display panel corresponding to the icon display section is provided. By mounting the driving IC for the dot matrix display section and / or the icon display section on the back surface of the, the icon display section is made a reflective display, and the dot matrix display section is made a semi-transmissive display. , Miniaturization was achieved.

Moreover, in the present invention, by using such a small-sized liquid crystal display device, the market needs for a small-sized display device can be sufficiently answered.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a liquid crystal display device 23 of the present invention.

FIG. 2 is a cross-sectional view of the liquid crystal display device of the present invention taken along the line X-axis in FIG.

FIG. 3 is a schematic plan view of the liquid crystal display device of the present invention viewed from the back side.

FIG. 4 is a schematic cross-sectional view of the liquid crystal display device of the present invention along the section line in the Y-axis direction in FIG.

FIG. 5 is a plan view of a conventional liquid crystal display device.

FIG. 6 is a cross-sectional view showing an example of a conventional liquid crystal display device.

7A to 7E are enlarged views of respective dots in the dot matrix display portion.

FIG. 8 is a front view showing an example of a mobile phone according to the present invention.

FIG. 9 is a front view showing an example of a mobile terminal according to the present invention.

[Explanation of symbols]

1, 2, 23 ... Liquid crystal display device 3 ... Dot matrix display 4 ... Icon display section 5, 26 ... Signal electrode group 6 ... Scanning electrode group for dot matrix display 7: Signal side driving IC 10 ... Scan electrode group of icon display section 13, 14 ... Transparent substrate 15 ... Liquid crystal layer 17, 27 ... Polarizing plate 18 ... Reflective layer 19 ... Color filter layer 24 ... Backlight 28 ... Transparent substrate 29: Wiring pattern 31, 33 ... FPC 32 ... Scanning side driving IC

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Claims (2)

[Claims] 1. A liquid crystal display panel in which a pair of substrates on which electrodes and an alignment film are sequentially formed are opposed to each other via a liquid crystal layer to form a display area, and a backlight disposed on the back surface of the liquid crystal display panel. A liquid crystal display device further comprising a dot matrix display section and an icon display section in a display area of the liquid crystal display panel, wherein the dot matrix display section is provided on the back surface of the liquid crystal display panel corresponding to the icon display section. A liquid crystal display device, characterized in that a drive IC for an icon display section is mounted, the icon display section is a reflective display, and the dot matrix display section is a semi-transmissive display. 2. A display device using the liquid crystal display device according to claim 1.