JPS58136081A - Liquid crystal display to be carried on vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device in which a meter panel is displayed using a liquid crystal cell. This invention relates to a liquid crystal display device for a vehicle that can be easily operated by painting.

2. Description of the Related Art Conventionally, there is a liquid crystal display device for a vehicle that uses a liquid crystal cell to display a meter panel, for example, as shown in FIG.

In FIG. 1, 1 is a meter panel, and the meter panel 1 includes a speed display liquid crystal cell 2, an engine rotation display liquid crystal cell 3, a warning and gauge display liquid crystal cell 4, and an automatic shift display liquid crystal cell 5. Each of the liquid crystal cells 2 to 5 is provided with electrode segments to form a predetermined display pattern (picture display, numerical display, graph display, etc.).

By the way, in a vehicle meter display using a liquid crystal cell in this way, it is necessary to color the display part for warning display, automatic shift display, etc. so that it can be easily distinguished from other parts.

For this reason, as shown in FIG. 2(a), taking the warning display liquid crystal cell 4 as an example, the color filter 7 (7a is red,
7b indicates yellow and 7c indicates blue), or a second
As shown in FIG. 3(b), holes are made in the semi-transparent plate 6 and color filters 1a to 7b are adhered to the holes, and as shown in FIG. The illumination light from 8 and the color filter I are used to color the display pattern of the liquid crystal cell 4, so that the display pattern of the liquid crystal cell 4 is highlighted in color. Note that the liquid crystal display is equipped with a backlight 11 (in addition to the bright light) from the light source 8, a semi-transparent plate is used to prevent external light entering through the display pattern (which becomes transparent upon application of a drive signal) portion of the liquid crystal cell 4 during the day. 6, and display brightness is obtained from the combined intensity of this reflected light and illumination light.

However, in such conventional liquid crystal display devices, all liquid crystal color display is performed using color filters, which increases the number of components for the color filters and also requires the use of liquid crystal cells that create display patterns. Color filters must be placed and adhered to the semi-transparent plate in alignment with the electrode segments of the color filter, and if there is a misalignment in the assembly of the color filter, a different color may bleed into other display patterns. Therefore, high positioning accuracy is required, and assembly is complicated, which tends to increase costs. 'The present invention has been made in view of the above,
In order to reduce the number of coloring steps required to display the liquid crystal display pattern in color, a paint corresponding to the displayed color is applied to the surface of a semi-transparent plate provided behind the liquid crystal cell.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 4 is an exploded view of a liquid crystal display device according to an embodiment of the present invention.

First, to explain the configuration, 10 is a liquid crystal cell, TN
('IVIistcd N'ematic) GH (Gest Ho5t) with liquid crystal mixed with dye at a predetermined ratio
It is constructed by sandwiching and sealing the liquid crystal between glass plates, and superimposing deflection plates 11 and 11' with the same polarization direction on both sides, and the display surface has a gauge display pattern 12 and a warning display/zeturn 13a. , 13b,
Segment electrodes forming 13C are disposed, and when a drive signal is applied to the segment electrodes, the electric portion becomes transparent, and a transparent display is performed with respect to the non-display portion, which is a black background, corresponding to the display pattern.

' A semi-transmissive plate 14 is provided behind the liquid crystal cell 10, which receives light from a light source 15 using a cold cathode tube or the like via a diffuser plate 16, and provides transmitted illumination to the liquid crystal cell 10. External light that enters through the transparent portion of the liquid crystal cell 10 is reflected by the semi-transmissive plate 14, and this reflected light is combined with illumination light from a light source 15 to perform a transmissive display with the intensity of the light.

On the other hand, as means for color displaying each of the warning display patterns 138 to 13C formed by the arrangement of segment electrodes on the liquid crystal cell 10, the warning display pattern 138
The surface of the semi-transparent plate 14 facing 13C is coated with a coating corresponding to the displayed color to create colored portions 18a, 181)
, forming 18 Cft. This colored part 18a-1
8C is determined according to the type of coloring display pattern, for example, the colored portion 18a is red, the colored portion 18
b is painted yellow, and colored part 18C is painted blue.

FIG. 5 shows the semi-transparent plate 14 in the embodiment shown in FIG. 4. The semi-transparent plate 14 has a milky white color and outputs the illumination light from the light source and the reflected light of external light as white light.
Therefore, the transparent display pattern of the liquid crystal cell corresponding to the painted portion of the semi-transparent plate 140 is displayed in white. On the other hand, for the colored portions 188 to 18C that have been colored, the colored portions 188 to 18C for the display pattern of the opposing liquid crystal cell.
Transparent color display is performed using colored light with 18C paint color. That is, as shown in the AA cross-sectional view of FIG.
The light from the light source outputs colored transmitted light by backlighting the colored parts 18a to 18C painted on the surface of the semi-transmissive plate 14, and the external light incident through the transparent part of the liquid crystal cell is transmitted to the colored parts 18a to 18C painted on the surface of the semi-transparent plate 14. Colored by reflection from 188-18C painted surface
Only the wavelength components 18a to 18c are reflected, and the color transmission display of the warning display pattern is performed using light having an intensity that is the sum of the transmitted light and the reflected light.

In addition, the work of forming the colored parts 188 to 18C on the semi-transparent plate 14 is as simple as partitioning the colored parts 188 to 18c with a masking pattern and applying a predetermined paint uniformly by spraying or the like. As the number of parts increases,
No processing of the semi-transparent plate is required.

Further, any color can be freely selected according to the display pattern of the liquid crystal cell, and as a result, one display pattern can be displayed in a plurality of colors to improve the perseverance.

As explained above, according to the present invention, the configuration is such that the liquid crystal display is used for displaying a color display using a transflective plate that transmits illumination light from an internal light source and reflected light from outside light to the liquid crystal cell as transmitted light. Because the colored part is formed by painting, the liquid crystal color display can be easily displayed with a simple configuration.・Since it can be achieved by painting, it does not require an increase in the number of parts or assembly man-hours, making it cheaper in terms of cost, and since the paint color can be freely selected, the LCD display can be colored as desired, improving recognition. can be achieved.

[Brief explanation of drawings]

Figure 1 shows an example of a conventional device; Figure 2 shows a conventional color display structure;
4 is an exploded view showing an embodiment of the present invention, FIG. 5 is a perspective view of the semi-transparent plate in the embodiment of FIG. 4, and FIG. 5 is a sectional view taken along line A-A in FIG. 5. FIG. 10...Liquid crystal cell 11, 11'...Polarizing plate 12...Gauge display patterns 13a-13C...Warning display pattern 14...
・Semi-transparent plate 15... Light source 16... Diffusion plate 18a to 18C... Colored part Patent applicant
1” San Jidosha Co., Ltd. Agent Patent Attorney Hao Tsuchihashi Figure 4 Figure 5 Figure 42 Seiya Procedural Amendment i! F (Method) % formula % 1. Indication of the case 1987+, Special Patent Application No. 18146 Bow 2 Title of the invention Liquid crystal display device for vehicles 3 Person making the amendment Relationship with the case Patent applicant I 1 Place Kanna, Yokohama City, Kanagawa System Yoku Takaracho 211 Pond',,
lJ tr old (name) (399) Nissan Motor Co., Ltd. 4
, Agent 105 [8680-8931 Homare 6
Number of inventions increased by amendment Procedural amendment (voluntary) January 22, 1980 Director-General of the Patent Office Kazuo Wakasugi 1, Indication of the case 1981 Patent Application No. 18146 2, Name of the invention Liquid crystal display for vehicles Device 3: Relationship with the case of the person making the amendment Patent applicant address: 2 Takaracho, Kanayō-ku, Yokohama, Kanagawa Prefecture Name (
399) Nissan Motor Co., Ltd. 4, Agent 105 Phone 580-8931 @Fli
6th floor, Mori Building, 1-17, 1-17, Toranomon, Minato-ku, Tokyo Name (7519) Patent attorney Tsuchihashi Akira 5, Subject of amendment (1) Patent claim in detail 1 of written amendment dated June 1988 The entire text of the scope column should be amended as shown in the attached sheet. (2) On page 1, lines 12-13 of the specification of the procedural amendment dated June n, 1981, [the liquid crystal cell for displaying the meter panel] was changed to "the liquid crystal cell for displaying vehicle information such as vehicle speed and engine speed. Correct to "cell". (3) June 1980 Otobi Visitor #*Details of Sode Masayoshi No. 1
In the 14th to 15th lines of the text, "provided semi-transparent plate" is supplemented with "one semi-transparent plate". (4) ``Meter panel display'' on page 1, line 17 of the procedurally amended specification dated June 1980 is corrected to ``vehicle information display on the instrument panel.'' (5) Details of June n, 1981 proceedings of the court order *1i8
Correct "Meter panel" in the additional row of page i and the first row of the second page to "Instrument panel". (6) ``Engine rotation display...display liquid crystal cell 5'' on page 2, lines 1 to 4 of the specifications of the June 1980 Otsuchi Kitte Makurasode Seisho [for engine rotation display] liquid crystal cell 3, warning and gauge display liquid crystal cell 4, automatic transmission shift display liquid crystal cell 5''. (P. 5, lines 9 to 10 of the specification of the Procedural Amendment dated June n, 1980, "Regarding automatic shift display, etc." is amended to "Regarding shift display, etc. of automatic transmission.") (8) Showa era Amend "7a-7b" in the 18th line of the second member of the specification of the procedural amendment dated June 1957 to "17a-7C". (9) Specification of the written amendment dated June 1980 Page 4, lines 1 to 4, the display pattern is...
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・・・・・・・・・・・・・・・・・・"In a device that displays a display pattern in color by backlighting the colored part of a semi-transparent plate placed behind the cell, in order to facilitate the formation of the colored part, the colored part of the semi-transparent plate is It is formed by coating the surface with a coating of a predetermined color.'' 00) Page 1, lines 12-13 of the specification of the amended procedure dated June 1980 [transparent...
...Display transparently. " is corrected to "The display pattern is transparently displayed in the non-display area that becomes transparent and has a black background." σ0 In the specification of the procedural amendment dated June n, 1980, page 5, line 4, "matched" is amended to "matched". 021 ``By colored light'' in page 6, line 4 of the procedural amendment of Suzume's specification dated June n, 1980 is amended to ``by colored light.'' α3) Amend ``g visibility'' to ``visibility'' on page 7, line 3 of the specification of the procedure dated June n, 1988, by Masayo Yu. 041) Specification No. 7 of the procedural amendment officer dated June 1983
Line 7 of the page, "For display on the transparent plate," 1 on the surface of the transparent plate,
”. αtsu Page 7, lines 13-14 of the specification of the amended proceedings filed on June n, 1980, ``It can be done arbitrarily...
··be able to. ” is corrected to “It has the effect of being able to do it arbitrarily.” qO Amendment dated June 1988 Figures 4, 5, and 6 of the attached drawings are amended as shown in the attached amended drawings. Claims (after amendment) In a device that displays a display pattern in color by backlighting a colored portion of a semi-transparent plate disposed behind a liquid crystal cell, the colored portion is placed on the surface of the semi-transparent plate in a predetermined manner. A liquid crystal display device for a vehicle that is characterized by being formed from a coating film coated with paint of the color of the vehicle. Figure 4 Figure 5 A'' Figure 6 4 B

Claims (1)

[Claims] In a device that displays colored portions of a semi-transparent plate disposed behind a liquid crystal cell in color using backlighting from a light source, a display pattern relative to the display pattern of the liquid crystal cell is used. 1. A liquid crystal display device for a vehicle, characterized in that a coating film of a predetermined color is formed on the surface of a semi-transparent plate.