JPS6325625A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To attain display with different color tones by removing the uniformity of the numerical aperture of either one out of a stripe-like electrode and a stripe-like color filter which are opposed to each other in parallel and differenciating the leakage ratio of transmitted light. CONSTITUTION:The stripe-like electrodes 10, 11 are arranged on the inside of a glass plate and the stripe-like color filters (G)12, (R)13 corresponding to respective electrodes 10, 11 are formed on the electrodes 10, 11 oppositely to each other in parallel. The numerical aperture of a pattern is gradually reduced in the direction from the left side to the right side. Namely, the ratio of leaked transmitted light 23 to a lighting part transmitting light is increased in the direction to the right side. The light 23 shows blue by using a blue polarizing plate and blue is added to the lighting part transmitting light. When the lighting part transmitted color is green, the synthesized color becomes cyanine, and similarly in case of red and yellow, Magenta and white are synthesized respectively. The degree of color mixing can be determined by setting up the dimension of the numerical aperture. Simultaneously, display luminance also can be continuously changed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a transmissive color liquid crystal display device.

In particular, the present invention relates to a color liquid crystal display device in which a pattern is configured to be suitable for a variety of displays.

[Conventional technology]

As a transmission type liquid crystal display device, a configuration as shown in FIG. 3 can be considered. On the back side of the color liquid crystal display element 1, there is a light diffusing and transmitting plate 2 for diffusing the irradiated light from the fluorescent lamp 3, and a reflecting plate 4 is installed to cover the fluorescent lamp 3 from behind the fluorescent lamp 3. The color liquid crystal display element 1 is used as a transmission type device by forming a color filter on or under a transparent electrode in a liquid crystal cell.
In particular, here, one segment is constructed by two sets of fine striped transparent electrodes and corresponding striped color filters.

An example of the display contents of the color liquid crystal display element 1 is shown in FIG.

The number 188 in the center is a display figure of the speedometer display section 6, the left side of the speedometer display section 6 is the fuel remaining tillage display section 7, and the right side is the radiator water temperature display section 8.

Next, an example of the structure of the color liquid crystal display element 1 will be briefly explained in the fifth drawing. Striped transparent electrodes 10 and 11 are disposed inside the lower glass substrate 9, and corresponding striped color filters (G) 12 and (R) 13 are provided on the striped transparent electrodes 10 and 11, respectively.
is formed. Here, (G) and (R) are respectively green.

means red. On the other hand, transparent electrodes 15 each having a segment shape are formed inside the upper glass substrate 14 .

Furthermore, on the transparent electrodes on the upper and lower glass substrates,
An alignment control film 16 for aligning liquid crystal molecules in a certain direction is formed, and a TN liquid crystal 1 is formed between them.
7 is filled. Further, on the outside of the lower glass substrate 9 and the upper glass substrate 14, there are polarizing plates 18 and 1, respectively.
9 is attached.

Next, the sixth section briefly describes the driving method and its control circuit.
In the figure, two exclusive OR circuits 21.2
A rectangular pulse with a duty of 50% is commonly input to one input terminal of each of the control circuits 20 from the output terminal of the control circuit 20, and the pulse is also input to the application terminal A. The output terminals of the exclusive OR circuits 21 and 22 are connected to the application terminal B.
, C, respectively. Said exclusive jib OR
The other input terminals of the circuits 21 and 22 are connected to the output terminals E and F of the control circuit 20.
The data of rt 11F is output. As a result, from the output terminal of the exclusive OR circuit, #l O
If +1 is input, a pulse that is in phase with the input pulse, that is, in phase with application terminal A, is output, and conversely, 1'I
When the IF is applied, a pulse with an opposite phase is output.

Here, if a voltage of opposite phase is applied between the transparent electrodes 15-11 and 15-10, the liquid crystal will be in an ON state and will be transparent, and if they are in the same phase, it will be in an OFF state and will not be transparent, so the application terminal A
The phase of is 11011, and the phase of application terminal A and the opposite phase are #
When expressed as I It, display colors can be determined by phase combinations as shown in Table 1.

Table 1 By doing this, "O" and "1" of the application terminals B and C correspond to data "O" of the output terminals E and F of the control circuit 20.
, 1”.

Color display can be easily performed.

As a recent technology related to color liquid crystal displays,
A multicolor liquid crystal display element described in Japanese Patent No. 222877 is known. This known technology liquid crystal display element is a multicolor liquid crystal display element in which a color filter layer of a desired color is formed for each set, and each of the plurality of sets of electrodes is formed in a comb-like shape within a unit pixel for displaying an image. The patterns are arranged so that they do not overlap each other, but the proportion of the area between each pattern on the display area (
No consideration was given to partially changing the aperture ratio.

That is, in the prior art, in a color liquid crystal display device in which striped electrodes are formed in a comb-teeth shape and a striped color filter layer is provided opposite thereto, both the striped electrodes and the striped color filter are It was common sense and customary to make the aperture ratio constant and uniform.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, no consideration is given to setting the pattern aperture ratio differently within a single liquid crystal panel, so in completely static driving, the difference in color that occurs due to the colors of the formed color filters and their combinations. There was a problem in that it was not possible to display anything other than color.

The purpose of the present invention is to partially or continuously change the color tone of similar colors in addition to the colors produced by the formed color filter colors and their combinations when fully static driving is performed within one liquid crystal panel. It is an object of the present invention to provide a color liquid crystal display device which enables display with different characteristics and has excellent visibility and display quality.

[Means for solving problems]

First, the principle of the liquid crystal display device of the present invention created to achieve the above object will be briefly described.

The above purpose is to adjust the aperture ratio of multiple sets of fine striped electrodes formed for color display, or the aperture ratio of a striped color filter corresponding to the striped 'fl[, or both at the same time. Depending on the situation, this is achieved by partially or continuously different configurations. That is, in the color liquid crystal display device shown in FIG. 5, one display color is almost determined by the spectral characteristics of the color filters 12 and 13, but as shown in FIG. has a considerable influence.

In other words, since the leakage and transmitted light color is added to the color filter color of the lighting section, the actual display color varies greatly depending on the ratio of the leakage and transmission section to the area of the lighting section. As shown in Figure 2, if the lighting part stripe patterns R (red) or G (green) of width a are arranged alternately at intervals of width a, then the area of the lighting part relative to the total area is Considering the aperture ratio as a percentage, when R (red) is lit, it is a/2 (a + b), and when G (green) is lit, it is also a/2
(a+b), and when RG (yellow) is lit, (a
+ a ) / 2 (a + b ), so
It becomes a/(a+b).

The aperture ratio described above was set constant in the prior art, but the present invention breaks away from preconceptions and actively, consciously, and systematically changes the aperture ratio, thereby eliminating leakage. The display color tone is changed by changing the leakage state of transmitted light.

As a specific configuration for achieving practical effects based on the above-mentioned principle, the liquid crystal display device according to the present invention includes a liquid crystal display device on the liquid crystal side surface of one of a pair of parallelly opposing transparent substrates. A color liquid crystal display device in which a plurality of sets of striped electrodes are formed in a comb-teeth shape, and a striped color filter layer is provided on the other of the pair of transparent substrates.

The aperture ratio of at least one of the striped electrodes and the striped color filter is configured to be non-uniform, and the leakage rate of transmitted light is made different at locations where the aperture ratio is different, thereby making the displayed color tone different. shall be.

[Effect]

The color liquid crystal display device configured as described above has a pattern aperture ratio of multiple sets of fine striped transparent electrode patterns constituting one display and color filter patterns of multiple colors formed correspondingly above or below the electrode patterns. By partially changing the ratio of the light leaking from the gaps between the striped electrode patterns, which are normally non-lit parts, to the light in the lit parts, the ratio becomes different. As a result, the overall display color determined by the addition of the lit part color and the non-lit part color is
The color tone will differ depending on the difference in the ratio, so in addition to the color determined by the color filter color being used,
Display colors with different tones can be provided, and a wide variety of displays can be performed at low cost.

[Example] FIG. 1 is a schematic diagram of a plane pattern of a color liquid crystal display device according to the present invention, and shows a pergraph with two sets of striped fine patterns. Here, [just because]
As shown in Fig. 1, in the 6-pattern configuration in which the pattern widths of the striped transparent electrodes 10° 11 and the striped color filters 12 and 13 are the same, the pattern aperture ratio gradually decreases from the left side to the right side. There is. In other words, the ratio of the leaked transmitted light 29 to the light transmitted through the lighting section increases toward the right side. Now, if we use a polarizing plate for fruits and vegetables, this leaked transmitted light 23 becomes fruits and vegetables,
Blue will be added to the lighting part transmission color, so if the lighting part transmission color is green, it will be cyan, if it is red, it will be magenta, and if it is yellow, it will be white, but the size of the aperture ratio can be set. The degree can be determined by In the case of FIG. 1, since the display colors are changed gradually, the display colors can also be changed continuously as shown in the figure. At the same time, display brightness can also be changed in series.

Note that although the color filter colors are now two colors, green and red, the present invention is not limited to this. Furthermore, as for the background color, although a blue pigment polarizing plate is used, the liquid crystal material 17 may be mixed with a dichroic pigment of fruits and vegetables to further emphasize blue, and is not limited to fruits and vegetables.

In addition, in setting the aperture ratio, in this example, the width of the striped transparent electrode pattern and the color filter pattern were made the same, and the aperture ratio of both was configured to change in the same way. , color filter pattern aperture ratio, striped transparent electrode width, and striped transparent electrode aperture ratio can be set independently and considered in various combinations. In this case, if the aperture ratio of the color filter pattern is kept constant, there is an advantage that the entire display surface looks uniform when all the display parts are not lit.

According to this embodiment, with the same conventional color filter color,
In addition, completely static driving allows for more diverse displays, and if this is applied to a bar graph or the like as a series of display color changes, it can be particularly aesthetically pleasing and highly visible.

Next, another example will be shown. In the single color liquid crystal display element 1 shown in FIG. 4, there is a speedometer display section 6 that requires the highest visibility, and left and right fuel remaining amount display sections 7 and radiator water temperature display sections that do not require relatively high visibility. For example, if the aperture ratio of the latter is set larger than the former, and the tone of the display color is changed even though the same color filter is used. At the same time, it is also possible to provide a difference in brightness.

According to this embodiment, with the same color filter color as the conventional one,
In other words, it is possible to display a wider variety of displays at the same cost, and providing differences in display color tone, brightness, etc. between the important display area and the non-important display area is particularly effective in improving visibility.

In this embodiment, since it is possible to obtain display colors other than the single color filter color used for the two liquid crystal display elements and the display color produced by the combination thereof by static driving, the display brightness also differs at the same time. This makes it possible to display a variety of displays at the same cost as before, and these can be used in series in one display block, and the display block can be used fixedly as needed. It is also possible to implement the display in various ways to provide a display that is more aesthetically pleasing and has better visibility.

〔Effect of the invention〕

As detailed above, when the present invention is applied, when completely static driving is performed within one liquid crystal panel, colors other than those produced by the formed color filter colors and their combinations can be changed without increasing costs. It has an excellent practical effect of being able to display images in a wide range of colors, and greatly contributes to improving the display quality of color liquid crystal display devices, especially to improving visibility.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the configuration of striped transparent electrodes and color filter patterns in one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of the aperture ratio, Figure 3 is an explanatory diagram of the general configuration of a color liquid crystal display device, Figure 4 is a plan view showing an example of a color liquid crystal display, and Figure 5 is a diagram of a general color liquid crystal display element. A sectional view showing an example, and FIG. 6 is a circuit diagram showing a drive circuit. 1... Color liquid crystal display element, 1.0.11... Striped ttffl, 13... Color filter (R)
, 12... - 1-m-LCD display element

Claims (1)

[Scope of Claims] 1. A plurality of sets of stripe-like electrodes are formed in a comb-teeth shape on the liquid crystal side surface of one of the pair of parallelly opposed transparent substrates, and In a color liquid crystal display device in which a striped color filter layer is provided on the other of the transparent substrates, the aperture ratio of at least one of the striped electrodes and the striped color filter is configured to be nonuniform, and the aperture ratio is varied. What is claimed is: 1. A liquid crystal display device characterized in that the leakage rate of leaking and transmitted light is made different at the locations where the leakage occurs, thereby making the display color tone different. 2. The liquid crystal display device displays a bar graph, and the aperture ratio of at least one of the striped electrodes and the striped color filter is continuously and sequentially changed along the display progress direction of the bar graph. 2. A liquid crystal display device according to claim 1, wherein the liquid crystal display device is different in such a manner that the liquid crystal display device has the following characteristics. 3. The aperture ratio of the striped electrode is kept constant;
2. The liquid crystal display device according to claim 1, wherein only the aperture ratio of the striped color filter is changed either partially or continuously. 4. The aperture ratio of the striped color filter is constant, and only the aperture ratio of the striped electrode is changed either partially or continuously. The liquid crystal display device according to scope 1.